comprehensive metabolomics analysis based on uplc-q/tof

25
Comprehensive metabolomics analysis based on UPLC-Q/TOF-MS E and the anti-COPD eect of dierent parts of Celastrus orbiculatus Thunb. Na Yang, a Han Wang, a Hongqiang Lin, a Junli Liu, a Baisong Zhou, a Xiaoling Chen, a Cuizhu Wang, ab Jinping Liu * ab and Pingya Li * a The root, stem and leaf of Celastrus orbiculatus Thunb. (COT) have all been used as Chinese folk medicine. Aiming at revealing the secondary metabolites and screening the anti-COPD eect of COT, the comprehensive phytochemical and bioassay studies were performed. Based on the ultra-high performance liquid chromatography combined with quadrupole time-of-ight mass spectrometry (UPLC-Q/TOF-MS E ), the screening analysis of components in COT was conducted with the UNIFI platform, the metabolomics of the three parts were analyzed with multivariate statistical analysis. Cigarette smoke extract (CSE)-stimulated inammatory model in A549 cells was used to investigate the biological eect of the three parts. A total of 120 compounds were identied or tentatively characterized from COT. Metabolomics analysis showed that the three parts of COT were dierentiated, and there were 13, 8 and 5 potential chemical markers discovered from root, stem and leaf, respectively. Five robust chemical markers with high responses could be used for further quality control in dierent parts of COT. The root, stem and leaf of COT could evidently reduce the levels of pro-inammatory factors in a dose-dependent way within a certain concentration range. The stem part had a stronger anti-COPD eect than root and leaf parts. This study claried the structural diversity of secondary metabolites and the various patterns in dierent parts of COT, and provided a theoretical basis for further utilization and development of COT. 1. Introduction Celastrus orbiculatus Thunb. (COT), belonging to the family Celastraceae and the genus Celastrus L., is widely distributed throughout China. 1 The parts including root, stem and leaf all could been used as Chinese folk medicine to treat rheumatoid arthritis, vomiting, abdominal pain, and snakebites. 2,3 The root of COT was reported to possess anti-tumor, 4 antiviral, 5 bacte- riostatic 6 and lipid-lowering 1 activities, and about 50 compounds, including triterpenes, sesquiterpenoids, steroids and organic acids, were isolated from the root or root bark. 3,79 The stem was also reported to have anti-inammation, 10 anti- cancer 11 and fatty liver amelioration 12 eects, and nearly 100 compounds including triterpenes, diterpenoids, steroids, avonoids, phenolics and benzoquinone were isolated. 1316 For the leaf part, previous studies have found that the extract of it had insecticidal eect and hypoglycemic eect, 17 while only a few avonoids were isolated. 18 It was revealed that there were signicant variation for the contents of celastrol or total alkaloids in dierent parts of COT. 19,20 Along with continuous expansion of the folk and clinical application of COT, an in- depth study on the chemical constituents in dierent parts of COT has attracted more and more attention. However, the comprehensive comparative study on the chemical composition between root, stem and leaf parts of COT has not been reported so far. Recently, the UPLC-Q/TOF-MS method has been innovatively used for screening and identifying chemical components in herbal medicines and traditional Chinese medicine. And the global proling of various metabolites were reported. As part of these research works, we reported this method to detect some natural products including Platycodon grandiorum and Ginseng root. 21,22 Our research results showed that this method is high throughput, comprehensive, simple and ecient. As far as we know, the UPLC-Q/TOF-MS method has not been reported to identify the components in COT. So, the study in this paper comparatively analyzes the phytochemicals of root, stem and leaf parts of COT by using the UPLC-Q/TOF-MS method for the rst time and nds out the similarities and dierences between them. Chronic Obstructive Pulmonary Disease (COPD), predicted to rank as the third leading cause of death in the world, 23 is mainly caused by signicant exposure to harmful gases or a School of Pharmaceutical Sciences, Jilin University, Fujin Road 126, Changchun 130021, Jilin, China. E-mail: [email protected]; [email protected]; Tel: +86-431-85619803 b Research Center of Natural Drug, Jilin University, Changchun 130021, Jilin, China Cite this: RSC Adv. , 2020, 10, 8396 Received 28th November 2019 Accepted 18th February 2020 DOI: 10.1039/c9ra09965d rsc.li/rsc-advances 8396 | RSC Adv. , 2020, 10, 83968420 This journal is © The Royal Society of Chemistry 2020 RSC Advances PAPER Open Access Article. Published on 26 February 2020. Downloaded on 4/29/2022 10:51:13 AM. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. View Article Online View Journal | View Issue

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Page 1: Comprehensive metabolomics analysis based on UPLC-Q/TOF

RSC Advances

PAPER

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View Article OnlineView Journal | View Issue

Comprehensive m

aSchool of Pharmaceutical Sciences, Jilin

130021, Jilin, China. E-mail: liuj

+86-431-85619803bResearch Center of Natural Drug, Jilin Univ

Cite this: RSC Adv., 2020, 10, 8396

Received 28th November 2019Accepted 18th February 2020

DOI: 10.1039/c9ra09965d

rsc.li/rsc-advances

8396 | RSC Adv., 2020, 10, 8396–84

etabolomics analysis based onUPLC-Q/TOF-MSE and the anti-COPD effect ofdifferent parts of Celastrus orbiculatus Thunb.

Na Yang,a Han Wang,a Hongqiang Lin,a Junli Liu,a Baisong Zhou,a Xiaoling Chen,a

Cuizhu Wang,ab Jinping Liu *ab and Pingya Li*a

The root, stem and leaf of Celastrus orbiculatus Thunb. (COT) have all been used as Chinese folk medicine.

Aiming at revealing the secondary metabolites and screening the anti-COPD effect of COT, the

comprehensive phytochemical and bioassay studies were performed. Based on the ultra-high

performance liquid chromatography combined with quadrupole time-of-flight mass spectrometry

(UPLC-Q/TOF-MSE), the screening analysis of components in COT was conducted with the UNIFI

platform, the metabolomics of the three parts were analyzed with multivariate statistical analysis.

Cigarette smoke extract (CSE)-stimulated inflammatory model in A549 cells was used to investigate the

biological effect of the three parts. A total of 120 compounds were identified or tentatively characterized

from COT. Metabolomics analysis showed that the three parts of COT were differentiated, and there

were 13, 8 and 5 potential chemical markers discovered from root, stem and leaf, respectively. Five

robust chemical markers with high responses could be used for further quality control in different parts

of COT. The root, stem and leaf of COT could evidently reduce the levels of pro-inflammatory factors in

a dose-dependent way within a certain concentration range. The stem part had a stronger anti-COPD

effect than root and leaf parts. This study clarified the structural diversity of secondary metabolites and

the various patterns in different parts of COT, and provided a theoretical basis for further utilization and

development of COT.

1. Introduction

Celastrus orbiculatus Thunb. (COT), belonging to the familyCelastraceae and the genus Celastrus L., is widely distributedthroughout China.1 The parts including root, stem and leaf allcould been used as Chinese folk medicine to treat rheumatoidarthritis, vomiting, abdominal pain, and snakebites.2,3 The rootof COT was reported to possess anti-tumor,4 antiviral,5 bacte-riostatic6 and lipid-lowering1 activities, and about 50compounds, including triterpenes, sesquiterpenoids, steroidsand organic acids, were isolated from the root or root bark.3,7–9

The stem was also reported to have anti-inammation,10 anti-cancer11 and fatty liver amelioration12 effects, and nearly 100compounds including triterpenes, diterpenoids, steroids,avonoids, phenolics and benzoquinone were isolated.13–16 Forthe leaf part, previous studies have found that the extract of ithad insecticidal effect and hypoglycemic effect,17 while onlya few avonoids were isolated.18 It was revealed that there weresignicant variation for the contents of celastrol or total

University, Fujin Road 126, Changchun

[email protected]; [email protected]; Tel:

ersity, Changchun 130021, Jilin, China

20

alkaloids in different parts of COT.19,20 Along with continuousexpansion of the folk and clinical application of COT, an in-depth study on the chemical constituents in different parts ofCOT has attracted more and more attention. However, thecomprehensive comparative study on the chemical compositionbetween root, stem and leaf parts of COT has not been reportedso far.

Recently, the UPLC-Q/TOF-MS method has been innovativelyused for screening and identifying chemical components inherbal medicines and traditional Chinese medicine. And theglobal proling of various metabolites were reported. As part ofthese research works, we reported this method to detect somenatural products including Platycodon grandiorum andGinseng root.21,22 Our research results showed that this methodis high throughput, comprehensive, simple and efficient. As faras we know, the UPLC-Q/TOF-MSmethod has not been reportedto identify the components in COT. So, the study in this papercomparatively analyzes the phytochemicals of root, stem andleaf parts of COT by using the UPLC-Q/TOF-MS method for therst time and nds out the similarities and differences betweenthem.

Chronic Obstructive Pulmonary Disease (COPD), predictedto rank as the third leading cause of death in the world,23 ismainly caused by signicant exposure to harmful gases or

This journal is © The Royal Society of Chemistry 2020

Page 2: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Paper RSC Advances

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particles.24 Cigarette smoking was the leading environmentalrisk factor for COPD around the world, and cigarette smokerswere more likely to develop respiratory symptoms and hada higher COPD mortality rate. Along with the progressive lunginammation, some pro-inammatory mediators such as IL-1b,IL-6 and TNF-a participated in the occurrence and developmentof COPD.25 Although the COT had been used in treating variousinammatory diseases, the effect on the cigarette smoke extract(CSE)-induced inammatory reaction has not been reported sofar.

In the present study, the main medicinal parts of COT (root,stem and leaf) were chosen as the test sample. On one hand, thesimilarities and differences of phytochemicals in three partswere analyzed by using UNIFI platform and untargeted metab-olomics based on UPLC-Q/TOF-MSE. The components andpotential chemical markers to prole diverse classications ofmetabolites of three parts were investigated. On the other hand,the effects on CSE-induced inammatory reaction of these threeparts were explored in A549 cells. The anti-COPD activity ofdifferent parts was preliminarily discussed. This comprehensivestudy could reveal the structural diversity of secondary metab-olites and the different patterns of main medicinal parts ofCOT, and provide the data for further clinical application inanti-COPD. The study on the phytochemistry and the pharma-cological activity of various parts were both signicantly valu-able to the research and development of COT.

2. Experiment2.1. Materials and reagents

A total of 10 batches of fresh COT were collected from differentgrowth areas in China (Table 1). All herbs were authenticated bythe authors according to Hunan Province Local Standard forTraditional Chinese Medicine (2009 edition) for “Celastrusorbiculatus Thunb.”. The corresponding specimens had beendeposited in the Research Center of Natural Drug, JilinUniversity, China.

Methanol and acetonitrile were of LC/MS grade purchasedfrom Fisher Chemical Company. Formic acid was bought fromSigma-Aldrich Company, St. Louis, MO, USA. Deionized waterwas puried by Millipore water purication system (Millipore,Billerica, MA, USA). All other chemicals were analytically pure.Cigarettes for bioassay analysis were Xiongshi cigarette (China

Table 1 The detail information of the collected COT samples

No. Source

COT 01 Yichun city, Heilongjiang provinceCOT 02 Changchun city, Jilin province, ChCOT 03 Huhhot city, Inner Mongolia autonCOT 04 Lanzhou city, Gansu province, ChCOT 05 Taian city, Shandong province, ChCOT 06 Xi'an city, Shanxi province, ChinaCOT 07 Zhengzhou city, Henan province,COT 08 Chengdu city, Sichuan province, CCOT 09 Changsha city, Hunan province, CCOT 10 Jinhua city, Zhejiang province, Ch

This journal is © The Royal Society of Chemistry 2020

Tobacco Zhejiang Industrial Co., Ltd, Hangzhou, China), eachcigarette contained 11 mg of tar, 0.7 mg of nicotine, and 13 mgof carbon monoxide. Human lung carcinoma A549 cells wereobtained from the Department of Pathogen Biology, BasicMedical College, Jilin University. ELISA kits were bought fromNanjing Jiancheng Bio-engineering Institute.

2.2. Sample preparation of three parts of COT

Took the whole fresh COT, and separated the root, stem and leafpart respectively to get 30 test samples including root part (R1–R10) samples, stem part (S1–S10) samples and leaf part (L1–L10)samples. The aforementioned parts were air-dried, grinded andsieved with Chinese National Standard Sieve No. 3, R40/3 seriesto obtain the homogeneous powder respectively. Each powderwas weighted (2.0 g) accurately and extracted thrice (3 hours pertime) with 100 mL of 80% methanol at 80 �C, cooled, ltered,collected and combined the ltrate of each sample, concen-trated and evaporated to dryness.

For metabonomics analysis, each residue (all approximately2.0 mg) was dissolved in 1.0 mL of 80% methanol respectively,aer being ltered with a syringe lter (0.22 mm), 30 test solu-tions (RM1–RM10, SM1–SM10 and LM1–LM10) were obtained, whichwas injected into the UPLC system directly. Furthermore, toensure the suitability consistency and the stability of MS anal-ysis, a sample for quality control (QC) was prepared by pooling20 mL from every test solution, namely containing all of theconstituents in this analysis.

For screening analysis, the test solutions of root part (RS),stem part (SS) and leaf part (LS) were prepared by pooling 100 mLfrom RM1–RM10, SM1–SM10 and LM1–LM10 solutions, respectively.

For bioassay analysis, the test samples (Rbio, Sbio and Lbio) ofroot part, stem part and leaf part were prepared by combiningeach residue of R1–R10, S1–S10 and L1–L10, respectively. Then,Rbio, Sbio and Lbio were dissolved in water at the concentration of3.2 mg mL�1 to get the stock solutions stored in 4 �C.

2.3. Ultra-high performance liquid chromatographycombined with quadrupole time-of-ight tandem massspectrometry (UPLC-Q/TOF-MSE)

The separation and detection of components were performedon the UPLC system combined with Xevo G2-XS Q/TOF mass

Collection time

, China 12th August, 2017ina 3rd August, 2017omous region, China 10th August, 2017ina 13th August, 2017ina 5th July, 2017

14th July, 2017China 15th July, 2017hina 7th July, 2017hina 27th July, 2017ina 2nd July, 2017

RSC Adv., 2020, 10, 8396–8420 | 8397

Page 3: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

Compoundsidentifiedfrom

theroot,stem

andleaf

ofCOTbyUPLC

-QTOF-MSE

a

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

10.59

C29H

28O

850

4.18

2850

4.18

43�2

.754

9.18

10[M

+H

�COO]�,3

82.140

0[M

�H

�C7H

5O2]�,3

11.085

7[M

�H

�C11H

12O

3]�

Interiotherin

AR

33

2#1.23

C19H

20O

634

4.12

5634

4.12

60�1

.136

7.14

86[M

+Na]

+,3

27.118

5[M

+H

�H

2O]+,

315.07

07[M

+H

�2�

CH

3]+,2

38.059

1[M

+H

�C7H

7O]+,2

24.034

1[M

+H

�C8H

9O]+

5,7-Dihyd

roxy-6,8-

dimethyl-3(S)-3-(3-

methoxy-40-hyd

roxybe

nzyl)

chroman

-4-one

S—

32.43

C9H

12O

418

4.07

2818

4.07

36�4

.418

5.07

91[M

+H]+,1

67.058

4[M

+H

�H

2O]+,

136.05

93[M

+H

�H

2O

�CH

2OH]+

Euc

ommidiol

R,S

34

43.60

C16H

18N

2O3

286.13

2828

6.13

173.5

309.12

20[M

+Na]

+,2

42.084

1[M

+H

�3�

CH

3]+,

225.09

89[M

+H

�2�

OCH

3]+

PicrasidineB

S,L

a

53.64

C22H

28O

11

468.16

1646

8.16

32�3

.446

9.16

60[M

+H]+,2

90.103

6[M

+H-Glu]+,2

32.069

1[M

+H

�C3H

7O-Glu]+

Cim

icifug

aglycoside

R35

63.66

C19H

30O

838

6.19

2538

6.19

41�4

.240

9.18

11[M

+Na]

+,2

26.012

4[M

+H

�C6H

9O5]+,

178.08

37[M

+H

�2�

CH

3-Glu]+,1

90.125

5[M

+H

�H

2O-Glu]+

Roseo

side

R,S

,L36

73.97

C25H

28O

642

4.19

0142

4.18

863.6

447.18

12[M

+Na]

+,4

07.122

6[M

+H

�H

2O]+,

303.05

39[M

+H

�C9H

14]+,1

76.053

3[M

+H

�H

2O

�C9H

14�

C6H

5O2]+

Norku

rarinon

eR

37

84.17

C19H

20O

634

4.12

4434

4.12

60�4

.734

5.13

16[M

+H]+,2

22.053

0[M

+H

�CH

3�

C7H

7O]+,1

53.051

1[M

+H

�C11H

12O

3]+

2,3-Dihyd

ro-5,7-dihyd

roxy-

8-methoxy-3-[(4-

methoxyp

hen

yl)m

ethyl]-6

-methyl-4H-1-ben

zopy

ran-4-

one

S38

94.44

C15H

18O

832

6.09

9332

6.10

02�2

.932

5.08

70[M

�H]�,1

28.042

6[M

�H

�H

2O-Glu]�,

100.04

09[M

�H

�HCOOH-Glu]�,7

5.05

70[M

�H

�C3H

3O2-Glu]�

Glucosido

-p-cou

maric

acid

Rs

104.60

C20H

20O

534

0.12

9534

0.13

11�4

.534

1.13

55[M

+H]+,2

56.064

1[M

+H

�C5H

9O]+,

238.06

92[M

+H�H

2O�C5H

9O]+,1

93.071

3[M

+H

�C9H

7O2]+

PsorachalconeA

S—

11※

5.02

C32H

34O

12

610.20

4861

0.20

50�0

.460

9.14

46[M

�H]�,5

41.201

1[M

�H

�O

�C2H

3O]�,3

71.189

8[M

�H

�O

�2�

C5H

3O3]�

Orbiculin

IL

125.28

C27H

36O

13

568.21

3956

8.21

56�2

.859

1.20

31[M

+Na]

+,3

59.145

9[M

+H

�CH

2OH-

Glu]+,3

45.125

1[M

+H

�CH

3�

C11H

13O4]+

CitrusinB

S,L

s

135.39

C15H

10O

730

2.04

1530

2.04

27�4

.130

3.04

84[M

+H]+,1

78.032

0[M

+H

�C6H

5O3]+,

108.02

86[M

+H

�H

2O

�C9H

5O4]+

Isoe

tin

Ss

14※

5.53

C27H

30O

16

610.15

3961

0.15

340.9

611.16

13[M

+H]+,4

32.104

0[M

+H-Glu]+,2

53.038

8[M

+H

�2�

Glu]+

Luteolin

7,40-diglucoside

L39

155.65

C24H

32O

10

480.20

0748

0.19

962.3

503.18

99[M

+Na]

+,3

86.151

7[M

+H

�2�

H2O

�COOCH

3]+,3

60.142

6[M

+H

�C8H

9O]+,1

91.071

5[M

+H

�C8H

9O

�C9H

13O3]+

Ilexin

L3S

165.66

C20H

24O

737

6.15

0537

6.15

22�4

.539

9.13

88[M

+Na]

+,3

16.121

7[M

+H

�2�

CH

3�

CH

2OH]+,3

10.132

0[M

+H

�2�

H2O

�CH

3O]+,

138.05

97[M

+H

�C12H

15O

5]+

Vladinol

CR

40

175.74

C15H

10O

730

2.04

1830

2.04

27�2

.930

3.04

91[M

+H]+,2

85.036

3[M

+H

�H

2O]+,

110.02

81[M

+H

�C9H

5O5]+

Que

rcetin

Sb

8398 | RSC Adv., 2020, 10, 8396–8420 This journal is © The Royal Society of Chemistry 2020

RSC Advances Paper

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Page 4: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

185.87

C19H

18O

431

0.11

9331

0.12

05�3

.830

9.12

66[M

�H]�,2

79.082

1[M

�H

�2�

CH

3]�,

278.09

77[M

�H

�OCH

3]�,1

73.053

2[M

�H

�OCH

3�

C8H

9]�,1

04.070

3[M

�H

�C11H

9O4]�

6,7-Dim

ethoxy-2-

phen

ethylch

romon

eS

s

195.96

C10H

10O

317

8.06

2317

8.06

30�3

.917

9.06

87[M

+H]+,1

64.037

4[M

+H

�CH

3]+,

120.04

91[M

+H

�COOCH

3]+,8

6.03

07[M

+H

�C6H

5O]+

Methyl-p-cou

marate

R41

206.75

C17H

14O

834

6.06

8834

6.06

89�0

.134

7.07

61[M

+H]+,3

29.062

9[M

+H

�H

2O]+,

298.06

88[M

+H

�H

2O�

OCH

3]+,2

19.046

0[M

+H

�H

2O

�C6H

5O2]+

Aksilarin

Rs

217.22

C14H

16O

424

8.10

4024

8.10

49�3

.524

9.11

05[M

+H]+,2

06.087

7[M

+H

�CH

3CO]+,

193.10

07[M

+H

�C3H

4O]+

Evodinnol

R42

227.58

C21H

22O

637

0.14

1037

0.14

16�1

.737

1.14

83[M

+H]+,220

[M+H�C9H

11O2]+,152

[M+

H�

C12H

11O

4]+

(+)-7,8-

Dideh

ydroarctigen

inR

43

237.73

C17H

20O

428

8.13

6028

8.13

62�0

.531

1.12

52[M

+Na]

+,2

74.109

0[M

+H

�CH

3]+,

238.08

42[M

+H

�2�

H2O

�CH

3]+

(+)-Celap

han

olA

R,S

s

248.47

C34H

44O

14

676.27

3867

6.27

311.0

677.28

11[M

+H]+,5

85.239

0[M

+H

�H

2O�CH

3�

C2H

3O2]+,5

56.265

0[M

+H�C7H

5O2]+,4

41.199

7[M

+H

�4�

C2H

3O2]+

Celan

gulinIV

S,L

258.57

C22H

24O

740

0.14

0740

0.15

22�3

.840

1.15

59[M

+H]+,3

83.062

3[M

+H

�H

2O]+,

365.21

18[M

+H

�2�

H2O

]+,2

34.076

3[M

+H

�C9H

11O3]+

Aschan

tin

R,S

44

268.83

C20H

20O

534

0.12

9534

0.13

11�4

.534

1.13

55[M

+H]+,3

26.064

1[M

+H

�CH

3]+,

299.05

62[M

+H

�C3H

7]+,1

50.056

2[M

+H

�C4H

7

�C8H

7O2]+

Corylifol

BS

45

278.94

C20H

18O

533

8.11

4333

8.11

54�3

.333

9.12

09[M

+H]+,2

18.094

5[M

+H

�C8H

7O]+,

176.07

35[M

+H

�H

2O

�C9H

7O2]+

Dem

ethoxycurcu

min

R46

288.95

C20H

20O

635

6.12

4735

6.12

60�3

.635

7.13

20[M

+H]+,2

45.082

0[M

+H

�CH

3�

C6H

5O2]+,9

6.03

46[M

+H

�H

2O

�C14H

11O

4]+

Leachianon

eG

Rs

298.96

C18H

20O

531

6.13

1731

6.13

111.8

339.12

09[M

+Na]

+,2

51.062

4[M

+H

�2�

H2O�

2�

CH

3]+,1

74.090

0[M

+H

�2�

H2O

�C7H

7O]+

(3R-cis)-3,4-Dihyd

ro-3,4-

diol-7-m

ethoxy-3-[(4-

methoxyp

hen

yl)m

ethyl]-

2H-1-ben

zopy

ran

R,S

30#

8.98

C22H

28O

842

0.17

9942

0.17

843.4

443.16

96[M

+Na]

+ ,20

5.08

43[M

+H

�2�

CH

2OH

�C8H

9O3]+,1

67.066

4[M

+H

�C13H

18O

5]+

(+)-Lyon

iresinol

S47

319.81

C24H

26O

844

2.16

1144

2.16

28�3

.844

3.16

75[M

+H]+,3

84.146

6[M

+H

�C2H

3O2]+,

381.12

68[M

+H

�2�

CH

3O]+,3

07.073

1[M

+H

�CH

3�

2�

CH

3O

�C2H

3O2]+

Interiorin

CR,S

3210

.35

C20H

18O

432

2.12

1832

2.12

054.0

323.12

91[M

+H]+,2

68.100

4[M

+H

�C4H

7]+,

254.08

34[M

+H

�C5H

9]+

Neo

bavaiso

avon

eR

48

3311

.39

C18H

34O

533

0.23

9233

0.24

06�4

.035

3.22

84[M

+Na]

+,2

77.212

9[M

+H

�3�

H2O]+,

150.11

00[M

+H

�2�

H2O

�C8H

17O2]+,8

1.05

69[M

+H

�H

2O

�C4H

7O2�

C8H

17O2]+

9-Octad

ecen

oicacid

R,S

s

3413

.75

C18H

20O

430

0.13

4830

0.13

62�4

.332

3.12

40[M

+Na]

+,1

38.055

6[M

+H

�C10H

11O2]+,

107.04

65[M

+H

�CH

3O

�C10H

11O2]+

tran

s-3,30,5,5

0 -Tetramethoxystilben

eS

35*

14.06

C30H

48O

650

4.34

4850

4.34

51�0

.6Virga

ureagenin

GR

49

This journal is © The Royal Society of Chemistry 2020 RSC Adv., 2020, 10, 8396–8420 | 8399

Paper RSC Advances

Ope

n A

cces

s A

rtic

le. P

ublis

hed

on 2

6 Fe

brua

ry 2

020.

Dow

nloa

ded

on 4

/29/

2022

10:

51:1

3 A

M.

Thi

s ar

ticle

is li

cens

ed u

nder

a C

reat

ive

Com

mon

s A

ttrib

utio

n 3.

0 U

npor

ted

Lic

ence

.View Article Online

Page 5: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

549.34

17[M

+HCOO]�,2

63.342

3[M

�H

�C14H

24O

3]�,2

39.323

9[M

�H

�C16H

24O3]�

3614

.33

C28H

42O

545

8.30

5345

8.30

324.6

457.29

81[M

�H]�,3

44.332

1[M

�H

�2�

H2O

�HCOOH

�CH

2OH]�,2

33.295

7[M

�H

�C13H

20O

3]�,

3b,4b,23-Trihyd

roxy-24,30

-dinorolean-12,20

(29)-dien-

28-oic

acid

R50

3715

.19

C28H

46O

546

2.33

4946

2.33

450.8

461.32

76[M

�H]�,4

25.327

0[M

�H

�2�

H2O]�,

193.23

96[M

�H

�C17H

32O

2]�

Polypo

rusteron

eF

R51

3815

.26

C39H

54O

661

8.39

2661

8.39

201.0

641.38

57[M

+Na]

+,5

33.334

4[M

+H

�C3H

4�

HCOOH]+,3

98.248

6[M

�2�

CH

3�

C3H

4�

C8H

7O3]+

Lup-20

(29)-en-28-oic-3b

-yl

caffeate

Rs

39*

15.47

C30H

40O

446

4.29

3446

4.29

271.5

509.25

51[M

+HCOO]�,3

86.269

3[M

�H

�H

2O�

C2H

3O2]�,1

99.222

8[M

�H

�C17H

28O

2]�

Pristimerin

R52

40※

15.84

C33H

38O

957

8.25

3557

8.25

163.3

577.26

83[M

�H]�,5

61.268

0[M

�H

�O]�,

547.21

87[M

�H

�2�

CH

3]�,5

34.217

6[M

�H

�C2H

3O]�

Orbiculin

AR,L

s

4116

.28

C30H

46O

447

0.33

9947

0.33

960.6

469.33

26[M

�H]�,4

54.315

7[M

�H

�CH

3]�,

451.33

03[M

�H

�H

2O]�,3

42.352

2[M

�H

�C8H

15O]�

11-Oxoka

nsenon

olR

53

4216

.52

C30H

46O

650

2.33

1550

2.32

944.1

547.33

26[M

+HCOO]�,4

55.323

6[M

�H

�HCOOH]�,4

01.350

5[M

�H

�3�

H2O

�HCOOH]�

Esculen

ticacid

Rs

4316

.66

C31H

44O

651

2.31

1851

2.31

38�3

.951

1.30

45[M

�H]�,4

95.292

9[M

�H

�O]�,

467.24

12[M

�H

�CO2]�,2

33.253

5[M

�H

�C17H

26O

3]�

Paeo

nen

olideG

R,L

54

4416

.79

C32H

40O

855

2.27

1755

2.27

23�1

.159

7.26

99[M

+HCOO]�,4

87.225

0[M

�H

�H

2O�

CH

3�

CH

3O]�,1

93.106

5[M

�H

�C21H

26O

5]�

Sauc

erneo

lA

R,S

,L55

4516

.80

C27H

44O

849

6.30

5549

6.30

363.8

541.30

50[M

+HCOO]�,4

61.302

6[M

�H

�2�

H2O]�,3

78.287

6[M

�H

�C6H

13O2]�

Turke

steron

eR,L

56

4616

.81

C30H

50O

244

2.39

0744

2.38

11�0

.944

1.37

13[M

�H]�,4

23.328

6[M

�H

�H

2O]�,

233.34

56[M

�H

�C14H

24O

]�Olean

olic

alcohol

S,L

57

4717

.06

C20H

34O

433

8.24

6133

8.24

571.1

361.23

53[M

+Na]

+,2

67.223

9[M

+H

�4�

H2O]+,

262.16

73[M

+H

�CH

3�

2�

CH

2OH]+,2

78.012

4[M

+H

�C3H

5O2]+

Hallol

Ra

4817

.22

C18H

28O

227

6.20

8627

6.20

89�1

.027

7.21

41[M

+H]+,2

48.219

7[M

+H

�C2H

5]+,

222.15

20[M

+H�C4H

7]+,6

7.05

79[M

+H�C2H

5�

C11H

17O

2]+

6,9,12

,15-

Octad

ecatetraen

oicacid

R58

4917

.23

C16H

30O

225

4.22

4925

4.22

461.2

277.21

41[M

+Na]

+,1

25.116

0[M

+H

�C4H

9�

C3H

5O2]+,1

12.080

4[M

+H

�H

2O

�C9H

17]+

Oleop

almitic

acid

R,S

,L59

50*

17.25

C30H

44O

446

8.32

2546

8.32

40�3

.246

7.24

41[M

�H]�,4

34.290

5[M

�H

�H

2O

�CH

3]�,4

23.332

0[M

�H

�CO2]�

3b-H

ydroxy-2-oxoolean-12-

ene-22

,29-actone

R—

51*

17.30

C27H

40O

646

0.28

3346

0.28

251.7

483.27

51[M

+Na]

+,3

61.235

5[M

+H

�C6H

12O

]+,

417.22

82[M

+H

�CO2]+,3

19.248

0[M

+H

�C8H

14O2]+

Lucide

nic

acid

NR

60

52#

17.38

C27H

44O

443

2.32

2343

2.32

40�3

.8Chlorogenin

R,S

,La

8400 | RSC Adv., 2020, 10, 8396–8420 This journal is © The Royal Society of Chemistry 2020

RSC Advances Paper

Ope

n A

cces

s A

rtic

le. P

ublis

hed

on 2

6 Fe

brua

ry 2

020.

Dow

nloa

ded

on 4

/29/

2022

10:

51:1

3 A

M.

Thi

s ar

ticle

is li

cens

ed u

nder

a C

reat

ive

Com

mon

s A

ttrib

utio

n 3.

0 U

npor

ted

Lic

ence

.View Article Online

Page 6: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

431.22

17[M

�H]�,3

97.342

8[M

�H

�O�

H2O]�,

395.32

58[M

�H

�2�

H2O]�,2

49.101

9[M

�H

�C11H

18O

2]+

5317

.56

C20H

22O

432

6.15

1532

6.15

18�0

.832

7.15

88[M

+H]+,3

12.129

5[M

+H

�CH

3]+,

256.10

67[M

+H

�2�CH

3�C3H

5]+,2

03.223

7[M

+H

�C7H

8O2]+

Deh

ydrodiisoe

ugen

olR

61

54※

17.62

C30H

48O

548

8.35

2348

8.35

024.4

487.29

17[M

�H]�,4

69.324

0[M

�H

�H

2O]�,

433.32

97[M

�H�3�H

2O]�,4

11.103

3[M

�H

�2

�CH

3�

HCOOH]+,4

05.302

9[M

�H

�2�

H2O�

HCOOH]�

Orthosph

enic

acid

R,S

,La

5517

.80

C35H

40O

757

2.27

8857

2.27

742.4

571.27

38[M

�H]�,5

55.282

6[M

�H

�O]�,

331.23

34[M

�H

�O

�C6H

5�

C9H

7O2]�

CelastrineB

R,S

,L—

5617

.84

C30H

46O

345

4.34

4545

4.34

47�0

.545

5.34

92[M

+H]+,408

.343

5[M

+H�H

2O�CHO]+,

325.22

91[M

+H

�CH

3�

C6H

11O

]+(13a

,14b

,17a

,20S

,24Z

)-La

nosta-26-hyd

roxy-3-oxo-

7,24

-dien-21-al

R,S

a

57*

18.02

C27H

44O

748

0.31

0648

0.30

874.0

479.24

39[M

�H]�,4

64.290

3[M

�H

�CH

3]�,

461.29

34[M

�H

�H

2O]�,4

14.277

9[M

�H

�H

2O

�C2H

7O]�,2

02.023

9[M

�H

�C11H

22O3]+

Viticosterone

R,S

,L62

5818

.11

C30H

46O

345

4.34

6445

4.34

473.8

453.34

14[M

�H]�,4

35.360

8[M

�H

�H

2O]�,

409.33

19[M

�H

�CO2]�,3

76.371

6[M

�H

�H

2O

�CH

3�

CO2]�,2

23.210

0[M

�H

�C15H

18O

2]�

WilforlideA

Rs

5918

.20

C28H

48O

241

6.36

3641

6.36

54�4

.146

1.36

18[M

+HCOO]�,2

65.259

1[M

�H

�C9H

10O2]�,1

49.230

9[M

�H

�C19H

38]�

g-Tocop

herol

R63

6018

.24

C30H

38O

11

574.24

2357

4.24

141.5

597.23

15[M

+Na]

+,3

95.189

7[M

+H

�C2H

3O2�

C7H

5O2]+,3

39.172

4[M

+H

�4�

C2H

3O2]+

Ejap3

R,L

a

61#

18.38

C16H

32O

225

6.23

9325

6.24

02�3

.727

9.23

03[M

+Na]

+,1

99.178

7[M

+H

�C4H

9]+,

69.055

3[M

+H

�2�

CH

3�

C9H

17O2]+

Methyl

(12S

)-12

-methyltetrad

ecan

oate

Sa

6218

.41

C32H

44O

855

6.30

1655

6.30

36�3

.655

5.29

10[M

�H]�,4

63.260

4[M

�H

�H

2O�

CH

3

�C2H

3O2]�,3

13.228

5[M

�H

�H

2O�

C7H

13O2�

C5H

3O2]�

14,15-Epo

xy-14H

-cyclop

enta

[a]

phen

anthrene,

bufa-20,22

-dien

olidede

riv.

R—

63*

18.46

C30H

42O

751

4.29

3151

4.29

310.1

515.30

17[M

+H]+,4

69.285

9[M

+H

�HCOOH]+,

417.26

08[M

+H

�C6H

10O]+,3

77.229

7[M

+H

�C9H

14O]+

Gan

oderen

icacid

AR

60

64#

18.67

C30H

48O

345

6.35

8345

6.36

04�4

.745

7.36

75[M

+H]+,4

39.352

0[M

+H

�H

2O]+,

424.26

88[M

+H

�H

2O�CH

3]+,3

30.246

5[M

+H

�C8H

15O]+

Kan

senon

olS

64

6518

.69

C16H

32O

225

6.23

9425

6.24

02�2

.730

1.23

76[M

+HCOO]�,9

7.09

91[M

�H

�C6H

13�

C3H

5O2]�,6

8.05

54[M

�H

�CH

3�

C8H

17�

C2H

3O2]�

4,8,12

-Trimethyltridecan

oicacid

S65

6618

.69

C18H

30O

227

8.22

3327

8.22

46�4

.527

9.22

92[M

+H]+,2

61.235

3[M

+H

�H

2O]+,

72.055

4[M

+H

�C11H

19�

C2H

3O2]+

Gam

olen

icacid

R,S

66

6718

.74

C30H

46O

447

0.33

9947

0.33

960.6

469.33

26[M

�H]�,4

54.315

7[M

�H

�CH

3]�,

451.33

03[M

�H

�H

2O]�,4

07.372

6[M

�H

�H

2O

�CO2]�,2

61.410

2[M

�H

�C14H

24O

]�

3b-H

ydroxy-11a

,12a

-epo

xy-

13b,28-ursolide

Ra

This journal is © The Royal Society of Chemistry 2020 RSC Adv., 2020, 10, 8396–8420 | 8401

Paper RSC Advances

Ope

n A

cces

s A

rtic

le. P

ublis

hed

on 2

6 Fe

brua

ry 2

020.

Dow

nloa

ded

on 4

/29/

2022

10:

51:1

3 A

M.

Thi

s ar

ticle

is li

cens

ed u

nder

a C

reat

ive

Com

mon

s A

ttrib

utio

n 3.

0 U

npor

ted

Lic

ence

.View Article Online

Page 7: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

6818

.83

C28H

36O

748

4.24

5848

4.24

61�0

.646

9.25

97[M

�OH]+,3

63.235

0[M

+H

�C7H

6O2]+,

345.18

52[M

+H

�H

2O�

C7H

6O2]+,2

18.170

8[M

+H

�2�

H2O

�C7H

6O2�

C6H

5O2]+

ScutelloneI

R67

6918

.94

C30H

46O

447

0.33

9947

0.33

960.6

471.33

26[M

+H]+,4

25.315

7[M

+H

�HCOOH]+,

289.32

41[M

+H

�C11H

18O

2]+,2

49.338

3[M

+H

�C14H

22O

2]+

Hed

erag

onic

acid

R68

7018

.97

C30H

48O

345

6.36

0645

6.36

040.5

457.36

78[M

+H]+,4

39.223

1[M

+H

�H

2O]+,

249.34

37[M

+H

�C14H

24O

]+,2

03.165

3[M

+H

�C14H

24O

�HCOOH]+

Ursolic

acid

R,S

,L69

7119

.00

C18H

30O

329

4.21

8429

4.21

95�3

.631

7.20

60[M

+Na]

+,2

77.211

5[M

+H

�H

2O]+,

172.08

63[M

+H

�C9H

15]+,1

24.108

1[M

+H

�C9H

15O3]+

9-Oxooctade

ca-10,12

-dien

oicacid

R,S

70

7219

.13

C30H

42O

751

4.29

3151

4.29

310.1

515.30

04[M

+H]+,4

54.266

0[M

+H

�CH

3�

HCOOH]+,4

15.267

6[M

+H

�C6H

12O]+,3

21.239

3[M

+H

�C11H

14O

3]+

Gan

oderen

icacid

BR

60

73*

19.30

C11H

14O

217

8.10

0117

8.09

944.2

201.08

86[M

+Na]

+,164

.073

9[M

+H

�CH

3]+,

107.05

89[M

+H

�CH

3O�

C3H

5]+,7

6.05

07[M

+H

�2�

CH

3O

�C3H

5]+

Isoh

omog

enol

R71

7419

.35

C29H

48O

242

8.36

7542

8.36

544.7

451.35

68[M

+Na]

+,4

11.244

9[M

+H

�H

2O]+,

274.22

05[M

+H

�C10H

19O

]+,2

56.226

0[M

+H

�H

2O

�C10H

19O]+

Seringo

sterol

R,L

72

7519

.46

C30H

44O

751

6.30

8051

6.30

87�1

.351

5.30

07[M

�H]�,5

00.286

5[M

�H

�CH

3]�,

497.33

83[M

�H

�H

2O]�,3

22.176

7[M

�H

�2�

H2O

�C8H

13O

3]�

Gan

oderic

acid

AR

73

7619

.72

C22H

30O

435

8.21

3235

8.21

44�3

.338

1.20

24[M

+Na]

+,3

16.206

3[M

+H

�C2H

3O]+,

273.16

48[M

+H

�C3H

7�

C2H

3O2]+

(3S,4a

S,10

aS)-3-(Acetyloxy)-

2,3,4,4a

,10,10

a-hexah

ydro-

6-hyd

roxy-1,1,4a-trim

ethyl-

7-(1-m

ethylethyl)-9(1H

)-ph

enan

threnon

e

Rs

7719

.73

C30H

50O

650

6.36

3250

6.36

074.9

505.35

59[M

�H]�,4

3.39

09[M

�H

�4�

H2O]�,

431.28

34[M

�H

�CH

3�

C3H

7O]�

13b,17b

-Epo

xyalisol

AR

s

7819

.89

C30H

46O

345

4.34

3845

4.34

47�2

.045

5.34

92[M

+H]+,4

09.343

5[M

+H

�HCOOH]+,

391.15

17[M

+H

�H

2O�

HCOOH]+,2

49.331

7[M

+H

�C14H

22O

]+

Olean

onic

acid

R,S

74

7920

.05

C30H

46O

548

6.33

3448

6.33

45�2

.448

7.34

06[M

+H]+,4

41.334

4[M

+H

�HCOOH]+,

413.34

36[M

+H

�H

2O

�CH

3�

HCOOH]+,

395.32

78[M

+H

�2�

HCOOH]+,2

49.535

8[M

+H

�C14H

22O3]+

Ceanothic

acid

Ra

80*

20.24

C28H

42O

647

4.29

8647

4.29

811.0

497.29

08[M

+Na]

+,4

57.234

2[M

+H

�H

2O]+,

411.23

24[M

+H

�H

2O�

CH

3�

CH

3O]+,2

85.039

9[M

+H

�H

2O

�C9H

16O3]+

Methyl

lucide

nateQ

R75

8120

.36

C29H

34O

851

0.22

5651

0.22

540.3

533.21

48[M

+Na]

+,4

10.176

0[M

+H

�C2H

3O

�C3H

6O]+,2

68.145

5[M

+H

�C2H

3O

�C7H

5O

�C5H

3O2]+

Orbiculin

BR

8220

.36

C30H

48O

345

6.36

1745

6.36

043.0

Olean

olic

acid

R,S

,L74

8402 | RSC Adv., 2020, 10, 8396–8420 This journal is © The Royal Society of Chemistry 2020

RSC Advances Paper

Ope

n A

cces

s A

rtic

le. P

ublis

hed

on 2

6 Fe

brua

ry 2

020.

Dow

nloa

ded

on 4

/29/

2022

10:

51:1

3 A

M.

Thi

s ar

ticle

is li

cens

ed u

nder

a C

reat

ive

Com

mon

s A

ttrib

utio

n 3.

0 U

npor

ted

Lic

ence

.View Article Online

Page 8: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

455.35

44[M

�H]�,3

91.344

0[M

�H

�H

2O

�HCOOH]�,1

49.370

7[M

�H

�H

2O

�C18H

27O2]�

8321

.14

C19H

38O

433

0.27

7033

0.27

700.1

353.26

32[M

+Na]

+,3

13.216

0[M

+H

�H

2O]+,

300.04

86[M

+H

�CH

3O]+,2

40.067

9[M

+H

�C3H

7O3]+

b-M

onop

almitin

S,L

76

84#

21.46

C39H

54O

661

8.39

4961

8.39

204.6

619.40

02[M

+H]+,5

65.412

6[M

+H

�3�

H2O]+,

472.35

57[M

+H

�C9H

7O2]+,4

56.344

3[M

+H

�C9H

7O3]+,4

11.135

6[M

+H

�C14H

24O]+

27-p-E-

Cou

maroyloxyursolicacid

S77

85#

21.49

C30H

46O

243

8.34

8543

8.34

98�2

.943

9.35

59[M

+H]+,4

21.343

2[M

+H

�H

2O]+,

390.11

26[M

+H

�H

2O�

CH

3O]+,2

50.344

3[M

+H

�C13H

17O]+

5-Deh

ydroka

roun

idiol

S—

86*

21.72

C13H

12O

220

0.08

3420

0.08

31�3

.320

1.08

86[M

+H]+,1

86.059

7[M

+H

�CH

3]+,

165.09

96[M

+H

�2�

H2O

]+,1

40.053

3[M

+H

�C2H

5O2]+

Safynol

R78

87*

22.03

C12H

16O

219

2.11

5719

2.11

503.7

215.10

45[M

+Na]

+,1

63.049

0[M

+H

�2�

CH

3]+,

150.17

39[M

+H�C3H

7]+,135

.217

3[M

+H�CH

3�

C3H

7]+,1

19.069

5[M

+H�CH

3�C2H

3O2]+,9

1.05

56[M

+H

�C3H

7�

C2H

3O2]+

Carvacryl

acetate

Ra

88*

22.04

C29H

38O

445

0.27

6645

0.27

70�0

.945

1.28

44[M

+H]+,4

33.259

1[M

+H

�H

2O]+,

405.27

71[M

+H

�HCOOH]+,2

15.362

1[M

+H

�C15H

24O

2]+,2

00.091

7[M

+H

�CH

3�

C15H

24O

2]+

Celastrol

R,S

,L79

8922

.05

C9H

10O

134.07

3713

4.07

323.4

157.06

32[M

+Na]

+,1

20.117

3[M

+H

�CH

3]+,

106.07

04[M

+H�C2H

5]+,7

7.04

77[M

+H�C2H

5�

CHO]+

4-Ethylbe

nzaldeh

yde

R80

90*

22.22

C29H

36O

444

8.26

0944

8.26

14�1

.044

9.26

79[M

+H]+,4

34.254

8[M

+H

�CH

3]+,

403.26

06[M

+H

�HCOOH]+,2

67.331

5[M

+H

�C12H

6O2]+

25-(9/

8)Abe

o-24

-nor-

friede

lan-2,3-dioxo-

1(10

),4,6,9(11)-tetraen

-29-

oicacid

R—

9122

.46

C38H

44N

2O6

624.32

0062

4.32

203.2

647.31

13[M

+Na]

+,5

03[M

+H�C8H

9O]+,3

14.139

5[M

+H

�CH

3�

C18H

16N

O2]+,2

97[M

+H

�C7H

7O

�C11H

17O2N]+,2

66.079

0[M

+H

�CH

3�

C8H

9O�

C13H

18N

O2]+

Neferin

R81

9222

.78

C32H

48O

551

2.34

8651

2.35

02�3

.151

1.34

13[M

�H]�,4

93.243

6[M

�H

�H

2O]�,

465.10

23[M

�H

�HCOOH]+,4

34.237

9[M

�H

�H

2O

�C2H

3O2]�,3

70.249

1[M

�H

�C8H

13O2]�

Gan

oderic

acid

XR

82

9322

.80

C12H

16O

219

2.11

5919

2.11

504.2

215.10

52[M

+Na]

+,1

78.089

3[M

+H

�CH

3]+,

107.51

47[M

�C5H

11O]+,7

8.05

71[M

+H

�C6H

11O2]+

Amyl

benzoate

Rs

9422

.81

C30H

52O

346

0.39

2046

0.39

170.8

483.38

13[M

+Na]

+,4

07.359

3[M

+H

�H

2O]+,

368.30

12[M

+H

�H

2O�

C3H

7O2]+,2

53.015

4[M

+H

�C14H

24O

]+

Oliba

num

olH

S,L

83

9522

.82

C30H

48O

447

2.35

4347

2.35

53�2

.147

3.36

15[M

+H]+,4

55.348

3[M

+H

�H

2O]+,

427.35

61[M

+H

�HCOOH]+,3

33.152

7[M

+H

�C9H

16O]+,2

90.014

6[M

+H

�CH

3�

C11H

20O]+

Ech

inocysticacid

R,S

84

9622

.83

C16H

32O

225

6.23

9025

6.24

02�4

.5Methyl

pentade

canoa

teR,S

,Ls

This journal is © The Royal Society of Chemistry 2020 RSC Adv., 2020, 10, 8396–8420 | 8403

Paper RSC Advances

Ope

n A

cces

s A

rtic

le. P

ublis

hed

on 2

6 Fe

brua

ry 2

020.

Dow

nloa

ded

on 4

/29/

2022

10:

51:1

3 A

M.

Thi

s ar

ticle

is li

cens

ed u

nder

a C

reat

ive

Com

mon

s A

ttrib

utio

n 3.

0 U

npor

ted

Lic

ence

.View Article Online

Page 9: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

279.22

76[M

+Na]

+,1

55.123

0[M

+H

�C5H

11�

CH

3O]+,8

5.04

88[M

+H

�C10H

21�

OCH

3]+

9723

.02

C22H

36O

436

4.26

0136

4.26

14�3

.736

5.26

65[M

+H]+,2

66.219

0[M

+H

�C6H

11O]+,

219.17

49[M

+H

�H

2O

�C2H

3O2�

C5H

9O]+

VitetrifolinE

S85

9824

.29

C12H

16O

219

2.11

5919

2.11

504.2

215.10

52[M

+Na]

+,1

64.089

3[M

+H

�CH

3]+,

136.05

87[M

+H

�C4H

9]+,7

8.05

71[M

+H

�C6H

11O2]+

Isop

entylbe

nzoate

Rs

9924

.31

C11H

14O

217

8.10

0317

8.09

944.7

201.08

95[M

+Na]

+,1

47.044

1[M

+H

�CH

3]+,

136.04

91[M

+H

�C2H

3O]+,1

22.047

7[M

+H

�C3H

5O]+,7

7.01

46[M

+H

�CH

3O

�C4H

7O]+

Anisylaceton

eR

86

100#

24.51

C30H

52O

346

0.38

9846

0.39

17�4

.148

3.36

82[M

+Na]

+,4

25.332

5[M

+H

�2�

H2O]+,

336.24

43[M

+H

�C9H

17]+,2

95.035

7[M

+H

�C12H

22]+

Neo

panaxad

iol

S87

101

24.71

C30H

48O

244

0.36

5644

0.36

540.3

441.37

29[M

+H]+,4

23.361

1[M

+H

�H

2O]+,

259.16

87[M

+H

�C11H

18O

2]+,2

19.031

2[M

+H

�C14H

22O

2]+

Daturan

olon

eR,S

88

102

24.94

C30H

48O

424.37

0142

4.37

05�1

.042

5.37

74[M

+H]+,4

07.363

3[M

+H

�H

2O]+,

392.34

59[M

+H

�H

2O�CH

3]+,2

18.192

6[M

+H

�C14H

23O

]+

Olean

-9(11),12-dien

-3b-ol

R,S

s

103*

25.48

C21H

24O

434

0.16

7234

0.16

75�0

.836

3.15

73[M

+Na]

+,1

89.071

1[M

+H

�CH

3�

C8H

9O2]+,1

73.093

9[M

+H

�CH

3O

�C8H

9O2]+,

107.04

94[M

+H

�CH

3O

�C13H

15O2]+

Deh

ydrodiisoe

ugen

olmethyl

ether

R89

104

25.67

C30H

46O

447

0.33

7247

0.33

96�4

.147

1.34

45[M

+H]+,4

56.201

6[M

+H

�CH

3]+,

398.51

07[M

+H�C3H

5O2]+,3

79.031

7[M

+H�2�

HCOOH]+,3

12.237

0[M

+H

�H

2O�

C8H

13O

2]+,

234.45

81[M

+H

�CH

3�

C3H

5O2�

C8H

13O

2]+

Nigranoicacid

Ra

105

25.70

C37H

42O

13

694.28

0169

4.27

783.6

695.28

73[M

+H]+,5

15.220

1[M

+H

�3�C2H

4O2]+,

393.22

28[M

+H

�3�

C2H

4O2�

C7H

6O2]+,

331.01

67[M

+H

�2�

C2H

4O2�

C7H

6O2�

C7H

5O2]+

Celah

inD

S,L

s

106

25.91

C28H

48O

400.36

9840

0.37

05�1

.642

3.35

91[M

+Na]

+,3

86.263

8[M

+H

�CH

3]+,

326.28

23[M

+H

�H

2O

�CH

3�

C3H

7]+,2

54.226

6[M

+H

�H

2O�

C8H

17O]+,2

13.225

2[M

+H

�H

2O

�C11H

22O]+

Fungisterol

R,S

a

107

25.93

C27H

44O

384.33

9038

4.33

92�0

.638

5.34

63[M

+H]+,3

67.041

7[M

+H

�H

2O]+,

256.25

47[M

+H

�H

2O�

C8H

15]+,2

15.241

5[M

+H

�H

2O

�C11H

20]+

(E)-22

-Deh

ydroch

olesterol

R90

108

25.96

C29H

48O

412.36

8641

2.37

05�4

.641

3.37

46[M

+H]+,2

60.220

4[M

+H

�CH

3�

C10H

19]+,2

57.215

1[M

+H

�H

2O

�C10H

19]+

28-Isofucosterol

R,S

a

109

26.22

C30H

48O

345

6.35

8845

6.36

04�3

.545

7.36

51[M

+H]+,4

39.214

2[M

+H

�H

2O]+,

411.35

84[M

+H

�HCOOH]+,2

65.181

2[M

+H

�C13H

20O

]+

Maytenoicacid

Rs

110

26.28

C29H

48O

412.37

0241

2.37

05�0

.841

3.37

75[M

+H]+,3

95.367

6[M

+H

�H

2O]+,

256.22

75[M

+H�H

2O�C10H

19]+,2

18.721

8[M

+H

�CH

3�

C13H

24]+

Chon

dryllasterol

R91

8404 | RSC Adv., 2020, 10, 8396–8420 This journal is © The Royal Society of Chemistry 2020

RSC Advances Paper

Ope

n A

cces

s A

rtic

le. P

ublis

hed

on 2

6 Fe

brua

ry 2

020.

Dow

nloa

ded

on 4

/29/

2022

10:

51:1

3 A

M.

Thi

s ar

ticle

is li

cens

ed u

nder

a C

reat

ive

Com

mon

s A

ttrib

utio

n 3.

0 U

npor

ted

Lic

ence

.View Article Online

Page 10: Comprehensive metabolomics analysis based on UPLC-Q/TOF

Tab

le2

(Contd.)

No.

t R(m

in)

Form

ula

Calcu

lated

mass(D

a)Theo

retical

mass(D

a)Masserror

(ppm

)MSE

frag

men

tation

Iden

tication

Source

Ref.

111

26.31

C18H

36O

228

4.27

2428

4.27

152.7

307.26

16[M

+Na]

+,1

40.131

2[M

+H

�2�

CH

3�

C6H

11O2]+,7

0.05

83[M

+H

�2�

CH

3�

C11H

21O2]+

Hexad

ecan

oicacid

Rs

112

26.62

C30H

48O

424.36

8642

4.37

05�4

.442

5.37

47[M

+H]+,4

10.358

4[M

+H

�CH

3]+,

367.30

99[M

+H�CH

3�C3H

7]+,273

.312

0[M

+H�

C11H

20]+

Fernen

one

R,L

92

113

26.83

C30H

48O

244

0.36

5644

0.36

540.3

441.37

29[M

+H]+,4

23.361

1[M

+H

�H

2O]+,

412.01

47[M

+H

�CHO]+,2

33.189

0[M

+H

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04.316

7[M

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Olean

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27.08

C28H

48O

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6.36

6741

6.36

542.9

439.35

59[M

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+,1

92.121

2[M

+H

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151.07

31[M

+H

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Cum

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R93

115

27.25

C24H

38O

439

0.27

5239

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3.26

44[M

+Na]

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79.080

9[M

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9

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9[M

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17�

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77.021

6[M

+H

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Flexim

elR,S

,Lb

116

27.52

C30H

48O

424.37

0942

4.37

050.9

425.37

82[M

+H]+,4

10.357

2[M

+H

�CH

3]+,

259.21

41[M

+H

�C11H

18O

]+,2

21.193

9[M

+H

�C14H

20O

]+

b-Amyron

R,S

,L94

117※

27.84

C36H

44O

962

0.30

0362

0.29

852.9

621.30

83[M

+H]+,5

62.285

1[M

+H

�C2H

3O2]+,

461.23

03[M

+H�C2H

3O2�C5H

9O2]+,2

91.208

8[M

+H

�C2H

5�

C2H

3O2�

2�

C7H

5O2]+

Celafolin

D-3

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s

118

27.88

C30H

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0.36

5644

0.36

540.3

441.37

29[M

+H]+,4

23.361

1[M

+H

�H

2O]+,

398.53

59[M

+H

�C3H

7]+,2

88.228

8[M

+H

�C11H

21]+,2

47.011

7[M

+H

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26]+

Polasterol

AR,S

,La

119

28.10

C29H

46O

410.25

3541

0.25

49�3

.441

1.35

99[M

+H]+,3

93.369

6[M

+H

�H

2O]+,

272.22

61[M

+H

�C10H

19]+,2

31.208

4[M

+H

�C13H

24]+

Corbisterin

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95

120

28.49

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50O

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2.38

1344

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110.5

465.37

05[M

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+,4

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291.35

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51.513

3[M

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3-Oxo-11b

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orbiculatusThun

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theleaf

ofCelastrus

orbiculatusThun

b.

This journal is © The Royal Society of Chemistry 2020 RSC Adv., 2020, 10, 8396–8420 | 8405

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spectrometer (Waters Co., Milford, MA, USA) with an electro-spray ionization (ESI) interface.

The ACQUITY UPLC BEH C18 column (100 mm � 2.1 mm,1.7 mm) was bought from Waters Corporation (Milford, MA,USA). The moving phrase was consisted of eluent A (0.1%methanoic acid in water, v/v) and eluent B (0.1%methanoic acidin acetonitrile, v/v) in a liner gradient program (0–2 min, 10% B;2–26 min, 10 / 90% B; 26–28 min, 90% B; 28–28.1 min, 90 /

10% B; 28.1–40 min, 10% B) with a ow rate of 0.4 mL min�1.Set the temperature of column and the sample manager at 30 �Cand 15 �C, respectively. 10% and 90% acetonitrile in aqueoussolution were used as weak and strong wash solventsrespectively.

The optimized MS parameters were as follows: sourcetemperature (150 �C), desolvation temperature (400 �C), conevoltage (40 V), capillary voltage at 2.6 kV (ESI+) and 2.2 kV (ESI�),cone gas ow (50 L h�1) and desolvation gas ow (800 L h�1).MSE mode was chosen with low energy of 6 V and high energy of20–40 V.26,27 The mass spectrometer was calibrated with sodiumformate in the range of 100 to 1200 Da in order to ensure themass reproducibility and accuracy. Leucine enkephalin (m/z556.2771 in ESI+ and 554.2615 in ESI�) was used as externalreference for Lock Spray™ injected at a constant ow of 10mL min�1. The QC sample was injected randomly 4 timesthroughout the whole work list. All of the volume injection ofthe samples and QC was 5 mL per run. During data acquisition,the data for screening analysis was performed in MSE

continuum mode, the data for metabolomics analysis was per-formed in MSE centroid mode. Data recording was performedon MassLynx V4.1 workstation (Waters, Manchester, UK).

2.4. Screening analysis of components in three parts of COTby UNIFI platform

UNIFI 1.7.0 soware (Waters, Manchester, UK) was used fordata analysis.28,29

Firstly, in addition to the internal Traditional MedicineLibrary on UNIFI platform, the chemical constituent investiga-tion was conducted. As the result, a self-built database ofchemical compounds isolated from the genus of Celastrus L.was established by searching the online databases includingWeb of Science, Medline, PubMed, ChemSpider and ChinaNational Knowledge Infrastructure (CNKI). The compoundname, molecular formula and chemical structure of compo-nents were obtained in the database.

Secondly, the raw data obtained from Masslynx workstationwere compressed by Waters Compression and Archival Toolv1.10, then were imported into the UNIFI soware.

Thirdly, the compressed data were processed by thestreamlined work ow of UNIFI soware in order to quicklyidentify the chemical compounds which were matched thecriteria with Traditional Medicine Library and self-built data-base. The main parameters of processed method were as follow:2D peak detection was set to 200 as the minimum peak area. Inthe 3D peak detection, the peak intensity of high energy and lowenergy was taken more than 200 and 1000 times as theparameter respectively. Selected +H and +Na as positive adducts

8406 | RSC Adv., 2020, 10, 8396–8420

and +COOH and –H as negative adducts. Leucine enkephalinwas used as reference compound in order to get exact massaccuracy, with [M + H]+ 556.2766 for positive ion and [M � H]�

554.2620 for negative ion. As a result, the comprehensivechemical constituents screening list was accomplished.

Finally, a lter was set to rene the results, with the masserror between �5 and 5 ppm and response value over 5000.Each compound was veried by compared with the character-istic MS fragmentation patterns reported in literature or theretention time of the reference substances.

2.5. Metabolomics analysis of three parts of COT

The raw data acquired by Masslynx workstation was processedon MakerLynx XS V4.1 soware (Waters, Milford, CT, USA).Firstly, the raw data were processed with alignment, decon-volution, and data reduction, etc. The main parameters of theprocess method were as follows: retention time (0–28 min),retention time window (0.20), mass (100–1200 Da), masstolerance (0.10), mass window (0.10), minimum intensity(5%), marker intensity threshold (2000 counts) and noiseelimination (level 6). As a result, the list with mass andretention time corresponded to the responses based on all thedetected peaks from each data le were shown in ExtendedStatistics (XS) Viewer. Secondly, multivariate statistical anal-ysis, both principle component analysis (PCA) and orthogonalprojections to latent structures discriminant analysis (OPLS-DA), were performed on the MakerLynx soware to analyzethe resulting data.

PCA, a classical unsupervised low dimensional patternrecognition model, was used to show pattern recognition andmaximum variation, and the overview and classication wereobtained. OPLS-DA was used to obtain the maximum separationbetween two different groups. S-plots, which could providevisualization of the OPLS-DA predictive results, were created toexplore the potential chemical markers which contributed tothe differences.

Meanwhile, metabolites with VIP value > 4.0 and p-value <0.001 were considered as potential chemical markers.30,31

Futhermore, permutation test was also performed to providea reference distribution with the R2/Q2 values to indicatestatistical signicance. Finally, the analysis results were shownin Simca 15.0 soware (Umetrics, Malmo, Sweden).

2.6. Bioassay analysis of three parts of COT

2.6.1 Preparation of cigarette smoke extract. The prepara-tion of the cigarette smoke extract (CSE) was basically the sameas previous reports.32 Put the smoke from one cigarette into20 mL culture medium (300 s per cigarette). The CSE solutionwas incubated at 37 �C for 30 min aer being ltered with a 0.22mm sterile lter. The CSE solution was prepared freshly and wasused within 30 min. This prepared CSE solution was consideredto have the highest concentration (100%).

2.6.2 Cell viability assay. The nal concentrations (20.0,40.0, 80.0, 160.0, 320.0 mg mL�1) of each test samples (Rbio, Sbioand Lbio) were acquired by diluting the stock solutions withDulbecco's Modied Eagle Medium (DMEM). A549 cells were

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cultured in 96-well plates at a density of 5 � 105 cells per welltreated with CSE (0%, 5%, 10%, 20%, 30% and 40%) for 18 h, ortreated with Rbio, Sbio and Lbio solutions (0.0, 20.0, 40.0, 80.0,

Fig. 1 The base peak intensity (BPI) chromatograms in root, stem and le

This journal is © The Royal Society of Chemistry 2020

160.0, 320.0 mg mL�1) for 24 h. The growth-inhibition effect ofCSE and the effect of the drugs on viability of A549 cells wereevaluated by MTT assay.

af of COT in ESI+ and ESI�.

RSC Adv., 2020, 10, 8396–8420 | 8407

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2.6.3 Drug treatment. For all groups, A549 cells werecultured in 96-well plates at a density of 5 � 105 cells per mL for18 h. In CSE group, the cells were treated with a certain dose of

Fig. 2 Chemical structures of compounds identified in the root, stem a

8408 | RSC Adv., 2020, 10, 8396–8420

CSE without drug intervened. In drug groups, the cells weretreated with both CSE and drugs (Rbio, Sbio or Lbio). In controlgroup, A549 cells were cultured normally without the CSE or

nd leaf of COT.

This journal is © The Royal Society of Chemistry 2020

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Fig. 2 (contd.)

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Fig. 2 (contd.)

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drugs. In positive group, the cells were treated with both CSEand dexamethasone (5 mg mL�1).

2.6.4 Enzyme-linked immunosorbent assay. The contentsof IL-1b, IL-6 and TNF-a in the cell culture supernatant weredetermined with ELISA kits. All procedures were performedaccording to the manufacturer's instructions.

2.6.5 Statistical analysis. Statistical analysis was performedon Graphpad Prism 6.0 soware (CA, USA). The results wereexpressed as mean� SD. Two tailed test or a one-way analysis ofvariance (ANOVA) was used to calculate statistical signicantdifference (p < 0.05).

8410 | RSC Adv., 2020, 10, 8396–8420

3. Results and discussion3.1. Screening analysis of components of three parts of COT

A total of 120 compounds, including 91 in ESI+ mode and 29 inESI� mode, were identied or tentatively characterized fromthree parts of COT (Table 2). The base peak intensity (BPI)chromatograms were shown in Fig. 1. The chemical structureswere shown in Fig. 2, the results showed that COT was rich innatural components with various structural patterns. On onehand, according to the reference, there were nearly 50, 100, 10compounds were reported from the root, stem, leaf parts of COT,

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Fig. 2 (contd.)

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respectively. While in this study, there were 92, 56 and 32components were identied or tentatively characterized fromroot part, stem part and leaf part of COT, respectively. And mostof the components were identied from COT for the rst time.Various kinds of structures, including triterpeniods,

This journal is © The Royal Society of Chemistry 2020

sesquiterpenoids, steroids, avonoids, organic acid and organicacid esters, phenylpropanoids, diterpeniods, monoterpenoids,alkaloid and others, were contained in each part of COT. Thenumbers (% of the total identied components in each part) andstructural types of compounds identied from root, stem and leaf

RSC Adv., 2020, 10, 8396–8420 | 8411

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Fig. 4 The PCA of root (R), stem (S), leaf (L) groups in ESI+ and ESI�. QC: quality control.

Fig. 3 The numbers (% of the total identified components in each part) and structural types of compounds identified from root, stem and leaf ofCOT. R: the root of Celastrus orbiculatus Thunb.; S: the stem of Celastrus orbiculatus Thunb.; L: the leaf of Celastrus orbiculatus Thunb.

Fig. 5 OPLS-DA plots/permutation tests/S-plots between R and S&L. R: the root of Celastrus orbiculatus Thunb.; S: the stem of Celastrusorbiculatus Thunb.; L: the leaf of Celastrus orbiculatus Thunb.

8412 | RSC Adv., 2020, 10, 8396–8420 This journal is © The Royal Society of Chemistry 2020

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Fig. 6 OPLS-DA plots/permutation tests/S-plots between S and R&L. R: the root of Celastrus orbiculatus Thunb.; S: the stem of Celastrusorbiculatus Thunb.; L: the leaf of Celastrus orbiculatus Thunb.

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of COT were shown in Fig. 3. There were 34, 18 and 10 triterpe-niods identied from root, stem and leaf, respectively, accountedfor 37%, 32% and 31% of the total components in each part. So,

Fig. 7 OPLS-DA plots/permutation tests/S-plots between L and R&S.orbiculatus Thunb.; L: the leaf of Celastrus orbiculatus Thunb.

This journal is © The Royal Society of Chemistry 2020

it was concluded that triterpeniods were the major constituentsin three parts of COT. Moreover, according to each percentage,the root part of COT was also rich in organic acid and organic

R: the root of Celastrus orbiculatus Thunb.; S: the stem of Celastrus

RSC Adv., 2020, 10, 8396–8420 | 8413

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Fig. 8 Heat-map visualizing the intensities of the potential chemicalmarkers.

Fig. 9 The cytotoxicity effects of different concentrations of cigarettesmoke extract (CSE) on A549 cells. **p < 0.01, compared with 0% CSEgroup.

Fig. 10 The cell viability effects of different concentrations of Rbio, Sbiogroup.

8414 | RSC Adv., 2020, 10, 8396–8420

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acid esters, steroids and phenylpropanoids. The stem part wasalso rich in organic acid and organic acid esters, and avonoids.The leaf part was also rich in steroids, and sesquiterpenoids. Thepercentage of avonoids in the total identied components instem was higher than the percentages in root part or in leaf part.The percentages of sesquiterpeniods and steroids in the totalidentied components in leaf was higher than the percentages inroot part or in stem part. On the other hand, the sharedcomponents (30 for root and stem, 22 for root and leaf, 23 forstem and leaf, 15 for root, stem and leaf) were also found in ourstudy. As shown in Fig. 3, the structures of shared componentswere various, while triterpeniods held themajority. Celastrol, oneof the triterpeniods, was shown to distribute in root, stem andleaf, which was consistent with the ref. 19. So our research workcould provide the scientic data to clarify the chemical compo-sition of COT, particularly for the root and the leaf parts.

Although the study provided evidences to elucidate thechemical composition of COT, there were still some unresolvedissues. For example, as shown in BPI chromatograms, therewere some unidentied components. Further research shouldbe carried on the identication of these unknown compounds.

3.2. Metabolomics analysis of three parts of COT

PCA score 2D plots in both ESI+ and ESI� were established asshown in Fig. 4. The QC samples were clustered tightly and were inthemiddle of the three groups in PCA, which indicated the systemhad satisfactory stability. The samples from root of COT wereclearly gathered together, which indicated there was a goodsimilarity among them, and this phenomenon was also observedin stem and leaf of COT. Meanwhile, the root, stem and leafgroups were easily divided into three clusters, indicating that thesethree parts of COT could be differentiated in both ESI+ and ESI�.

In order to further distinguish one part from the other twoparts, OPLS-DA plots, S-plots, permutation tests, and VIP valueswere obtained to see which variables were responsible forsample separation97 (Fig. 5–7). In OPLS-DA plots, each spotrepresented a sample. From the perspective of OPLS-DA, onepart was clearly separated from the other two parts. Theparameters such as R2 and Q2 indicated the model had good

and Lbio solution on A549 cells. **p < 0.01, compared with 0 mg mL�1

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ability of prediction and reliability in both ESI+ and ESI�modes.The permutation plots showed the original point on the rightwas clearly higher than all Q2-values (blue) on the le, whichindicated the original models were valid. To identify themetabolites contributing to the discrimination, S-plots weregenerated under OPLS-DA model. Each spot in S-plots repre-sented a variable. The variables with VIP > 4 and p < 0.001 wereconsidered as potential chemical markers. The possiblemolecular formula of the markers were calculated by high-accuracy quasi-molecular ion with mass error between�5 ppm. A total of 26 robust known chemical markers (markedin Table 2) enabling the differentiation between one part withthe other two parts were identied and marked in S-plots.

Fig. 11 The effects of inflammatory cytokine IL-1b, IL-6 and TNF-a on rcells. ##p < 0.01, compared with control group; *p < 0.05, compared w

This journal is © The Royal Society of Chemistry 2020

According to the reference, it was revealed that there wassignicant variation for the contents of celastrol or total alkaloidsin different parts of COT. While in this study, there were 13, 8 and5 potential chemical markers including celastrol discovered fromroot, stem and leaf, respectively. The markers in root including 8triterpenoids (35, 39, 50, 51, 63, 80, 88, 90), 1 steroids (57), 1organic acid esters (87), 1 phenylpropanoids (103) and 2 othercompounds (73, 86). The markers in stem including 4 triterpe-noids (64, 84, 85, 100), 1 avonoids (2), 1 phenylpropanoids (30), 1steroids (52) and 1 organic acid esters (61). The markers in leafincluding 3 sesquiterpenoids (11, 40, 117), 1 avonoids (14) and 1triterpenoids (54). Additionally, among these potential chemicalmarkers, the contents of 57 and 88 in root, 52 in stem, 40, 54 and117 in leaf were much higher than in the other two parts (p <

oot, stem and leaf (20–160 mg mL�1) of COT in CSE-stimulated A549ith CSE group; **p < 0.01, compared with CSE group.

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0.001). While components 35, 39, 50, 51, 63, 73, 80, 86, 87, 90 and103 were detected only in root, components 2, 30, 61, 64, 84, 85and 100 were detected only in stem, components 11 and 14 weredetected only in leaf part under the detect condition.

The detected result of 88 (celastrol) in our study, with muchhigher contents in root than in stem and leaf, was consistentwith the ref. 19. While there were a few differences between ourresults and the references. In the present study, compound 39(pristimerin) was only detected in root, and 11 (orbiculin I) wasonly detected in leaf. According to the reports, 39 was onceisolated from stem14 though mainly from root,98,99 and 11 iso-lated from root.3 The reason was the concentrations of themwere lower than the lowest detection limits. It was worthmentioning that some chemical markers with high responses inUPLC-MS, two triterpenoids (39 and 88) in root, one avonoids(2) in stem and two sesquiterpenoids (11 and 40) in leaf, couldbe used for further quality control of three parts of COTrespectively.

In order to systematically evaluate the chemical markers,a heat-map was generated. The hierarchical clustering heatmap, intuitively visualizing the difference level of potentialchemical markers in different parts, was shown in Fig. 8. Thehigher values were indicated by red squares, the lower valueswere indicated by green squares.

3.3. Bioactivity evaluation

3.3.1 Cytotoxicity of CSE and the three parts of COT on theviability of A549 cells. The results of MTT showed that theviability of A549 cells was obviously affected (p < 0.01) by 30% or40% CSE (Fig. 9). Therefore, 20% CSE was chosen as stimulus inthe following experiments. Additionally, as shown in Fig. 10, theviability of A549 cells were not signicantly affected by the Rbio,Sbio and Lbio solutions at 20–160 mg mL�1. So we evaluated theeffects of Rbio, Sbio and Lbio solutions at 20–160 mg mL�1 on CSE-stimulated A549 cells.

3.3.2 Effect of root, stem and leaf of COT on CSE-stimulated pro-inammatory cytokine levels in A549 cells.The inammatory development was characterized by the releaseof pro-inammatory mediators such as interleukin-1b (IL-1b),interleukin-6 (IL-6) and tumor necrosis factor-a (TNF-a).Whether the root, stem and leaf of COT could inhibit the releaseof IL-1b, IL-6 and TNF-a in CSE-stimulated lung epithelial cellswas investigated in this paper. As shown in Fig. 11, theproduction of IL-1b, IL-6 and TNF-a in A549 cells was obviouslyincreased aer treated with CSE (p < 0.01). However, treatedwith the Rbio, Sbio and Lbio solutions could evidently decreasethe levels of pro-inammatory factors in a good dose-dependentway with a certain range of 20–160 mg mL�1 in CSE-stimulatedcells. The Rbio solution could signicantly decrease the levelsof IL-1b, TNF-a (80 mg mL�1, p < 0.05; 160 mg mL�1, p < 0.01) andIL-6 (40 and 80 mg mL�1, p < 0.05; 160 mg mL�1, p < 0.01). TheSbio solution could signicantly decrease the levels of IL-1b,TNF-a (40 mg mL�1, p < 0.05; 80 and 160 mg mL�1, p < 0.01) andIL-6 (20 and 40 mg mL�1, p < 0.05; 80 and 160 mg mL�1, p < 0.01).The Lbio solution could signicantly decrease the levels of IL-6(80 mg mL�1, p < 0.05; 160 mg mL�1, p < 0.01) and TNF-a (80

8416 | RSC Adv., 2020, 10, 8396–8420

and 160 mgmL�1, p < 0.05), but showed no signicantly effect onIL-1b. The above results showed that the Sbio solution hada stronger anti-inammation effect than Rbio and Lbio. It issuggested that to explore the anti-COPD effect of the COT stemin vivo is meaningful in further research. The different activitiesof root, stem and leaf of COT might be caused by the variousphytochemicals in these three parts of COT. The phytochemicalstudy showed that three parts of COT were differentiated. Thebioassay study showed that three parts of COT could reduce thelevels of pro-inammatory factors to varying degrees. And thestem part had a stronger anti-COPD effect than root and leafparts. As we all know, the material basis of different pharma-cological activities is the different chemical composition. Theresults of the two parts of our study showed that the differentactivities of root, stem and leaf of COT might be caused by thevarious phytochemicals in these three parts of COT.

4. Conclusions

In conclusion, for screening analysis, a total of 120 compounds(15 shared components), including 92 from root, 56 from stemand 32 from leaf, were identied or tentatively characterizedfrom COT. Each part of COT was rich in various kinds ofstructures, especially triterpeniods held the majority. Formetabolomic analysis, the root, stem and leaf of COT weredifferentiated in both ESI+ and ESI� modes. There were 13, 8and 5 potential chemical markers identied from root, stemand leaf, respectively. Among the above robust markers, 5robust chemical markers with high responses in UPLC-MS, 2triterpenoids (pristimerin and celastrol) in root, 1 avonoids{5,7-dihydroxy-6,8-dimethyl-3(S)-3-(3-methoxy-40-hydrox-ybenzyl) chroman-4-one} in stem and 2 sesquiterpenoids(orbiculin I and orbiculin A) in leaf, could be used for furtherquality control in three parts of COT respectively. For bioassayanalysis, the root, stem and leaf of COT could evidently reducethe levels of pro-inammatory factors in a dose-dependent waywithin a certain range of 20–160 mg mL�1 in CSE-induced A549cells. The results showed that the stem part had a stronger anti-COPD effect than root and leaf parts. The different activitiesmight be caused by the various phytochemicals in these threeparts of COT. This comprehensive phytochemical studyrevealed both the structural diversity of secondary metabolitesand the different distributions in different parts of COT. Itcould provide a theoretical basis for further utilization anddevelopment of COT. And the identication of anti-COPDcomponents from COT will be explored deeply in the futurebased on the current results of this study.

Conflicts of interest

The authors declare no conicts of interests.

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