david j.a. jenkins - livestockresearch.ca€¦ · david j.a. jenkins department of nutritional...
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The implications of Gut Health - Why the Food Supply Chain needs a concerted approach in
dealing with one of to-days most pressing health issues!
David J.A. Jenkins
Department of Nutritional Sciences, Faculty of Medicine, University of Toronto;
Clinical Nutrition & Risk Factor Modification Center, St. Michael’s Hospital;
Toronto, Ontario, Canada
Conflict of Interest
C = Consultancies; H = Honorarium; SAB = Scientific Advisory Boards; G = Grants
• Barilla, Italy – A general food company. Producer of pasta and baked goods. G
• Solae, St. Louis – The major US producer of soy protein isolate. C,G • Unilever, Vlaardigen,Netherlands – Major margarine producers
including Becel and Take Control (plant sterol enriched margarine). G, GP
• Haine Celestial, CA – One of the largest Health Food companies in the US. G
• Loblaws Supermarkets – Canada’s largest supermarket chain. G, SAB
§ Sanitarium Company, Sydney, Australia – Australia’s largest health food manufacturing company and soy food producer. G, SAB
Conflict of Interest
§ Herbalife International, Century City, CA – A nutraceutical company with an emphasis on sourcing plant derived components for weight loss. SAB
§ Nutritional Fundamentals for Health, Montreal, QE – A new nutraceutical company exploring and aiming to market food derived components for health. SAB
§ Pacific Health Laboratories INC, Matawan, NJ – a nutrition technology company with functional food and nutraceutical products researched and commercialized for sports performance weight loss and type 2 diabetics which can be marketed without prior approval of the FDA. SAB, Stock
§ Metagenics/MetaProteomics, Gig Harbor WA – a company assessing natural products from hops which will positively impact individuals with specific genetic susceptibilities for chronic disease. SAB
C = Consultancies; H = Honorarium; SAB = Scientific Advisory Boards; G = Grants
Conflict of Interest
§ Bayer Consumer Care, Springfield NJ – Marketing of nutritional supplements/nutraceuticals. SAB
§ Oldways Preservation Trust, Boston, MA – A not for profit organization promoting traditionally “healthy” ways of eating (eg. Mediterranean Diet, etc.) H
§ Almond Board of California, Modesto, CA – A branch of the USDA (therefore “not for Profit”) to promote the use of almonds. C,H,G
§ The California Strawberry Commission, Watsonville, CA – Another USDA not for profit group to explore possible health benefits and to promote the use of strawberries. SAB
§ Orafti, Tienen, Belgium Development of prebiotics for modification of colonic microflora. SAB, G
C = Consultancies; H = Honorarium; SAB = Scientific Advisory Boards; G = Grants
Conflict of Interest
§ Unilever - Canada – Guidelines for the management of hyperlipidemia. G,C,H
§ Agriculture and Agrifoods Canada (AAFC) – SAB § Canadian Agriculyure Policy Institute (CAPI) – SAB § White wave- Dean Foods, Colorado – SAB, C, H § Orafti, Tienen, Belgium Development of prebiotics for modification of
colonic microflora. SAB, G § Wife and is a Director of Glycemic Index Laboratories, Toronto, CA
– Financial relationship of a spouse § Kellogg’s, Canada – C, H, SAB § Quaker Oats, Canada-C, H, SAB
C = Consultancies; H = Honorarium; SAB = Scientific Advisory Boards; G = Grants
Conflict of Interest
§ The Coco Cola sugar Advisory Board . C, H,SAB § Griffin Hospital, New Haven- For the development of the Nuval
System. C, H, SAB § Abbott Laboratories, Algorithms for Diabetes Management. C, H,
SAB § The Canola & Flax Councils of Canada. C, H,SAB § Pulse Canada - SAB § Saskatchewan Pulse Growers – SAB § Canadian Institute of Health Research (CIHR) – G § Canadian Foundation for Innovation (CFI) –G § Ontario Research Fund (ORF) – G § Advanced Foods and material Network (AFMNet) – G § International Tree Nut Council Nutrition Research and
Education Foundation and the Peanut Institute – G, H § Alpro Soy Foundation - H
C = Consultancies; H = Honorarium; SAB = Scientific Advisory Boards; G = Grants
Physiological Effects Low vs. High GI Foods:
Colon Fiber CH2O Sugar etc
↓
0
5
10
15
20
Test Food Groups
Car
bohy
drat
e Lo
sses
(%)
whi
te b
read
othe
rs
oat b
ran
& ba
rley
legu
mes
p<0.001
p<0.01
ns
p<0.001
ns
p<0.001
0
5
10
15
20
0 5 10 15 20 25 30 35
Fiber per 80 g carbohydrate portion (g)
Car
bohy
drat
e lo
sses
(g)
romano beans kidney beans
chick peas
oat bran barley lentils pumpernickel b
bread
pumpernickel a bread
wholemeal bread long grain rice
bulgur rye bread
rice chex corn chex
spaghetti white bread
macaroni instant potato instant rice parboiled rice
0
50
100
150
0 5 10 15 20 25
% Carbohydrate malabsorbed
Gly
cem
ic in
dex,
pub
lishe
d va
lues
rice chex
instant potatocorn chex
wholemeal breadwhite bread
oat branbulgur
rye bread
canned romano beans
canned chick peaslentils
pearl barleycanned kidney beans
Dimpflmeier pumpernickel breadKasseler pumpernickel bread
macaroni
long grain rice
spaghettiparboiled rice
instant rice
Delayed Absorption
Delayed Absorption
↑ Colonic Fermentation
Colon
Small Intestine
Humans: What Gets into the Colon
g/day Fiber (NSP)1 8-18 Starches/Sugars2 5-20% Resistant Starches3 8-40 Inulin 4 1-4 Protein5 3-9 Energy ~5-10%
1 Englyst et al, 1988, 1989; Bingham et al, 1990; 2 Cummings, 1995; 3 Englyst & Cummings, 1987; 4 Roberfroid, 2005; 5 Gibson et al, 1976; Chacko & Cummings, 1988
SCFA
Formate (1-2 mmol/L) Acetate 60 % Systemic Buytrate 20 % Luminal Propionate 20 % Hepatic
Mechanism of SCFA Absorption
Cummings et al, 1995, pg 141.
SCFA/HCO3-
exchange
Diffusion
Fate of SCFA
Acetate
Propionate
Butyrate
Glucose
Colonic Epithelium
Colon
Nitrogen Cycle
↓ N (Urea)
Urea
NH3 + SCFA Urease bacteria
Colon
NH3
↓ N, ↓ pH
↑ Bacterial N + ↑ NH4+
Diet Cells Fiber CH2O
NH4+
Encephalopathy
↑ Bacteria
Feces
Colonic Treatment of Chronic Renal Failure
Week Urea
Arabinogalactan 6 ↓ 11% (15 g bid) Ispaghula (Fibrogel) 8 ↓ 19% (3.5 g bid)
Do the Microflora count? Colonic Microflora and LDL-cholesterol
Jenkins et al., Metabolism. 2005 Jan;54(1):103-12.
Acetate and Lipids (Wolever et al., 1989)
Higher serum cholesterol
(90 mins)
Higher triglyceride
(60 mins)
n=6
TC=5.17 (0.41)
Propionate and Lipids (Wolever et al., 1991)
↓ Total-C
(p=NS)
↓ LDL-C
(p=NS)
↓ TG
(p=NS)
n=6
TC=3.85 (0.56)
Biotransformation of Soy Isoflavones Equol Production: CHO Fermentation
In vitro metabolism of daidzein in a colonic model of fermentation of human fecal flora showing the influence of a high CHO milieu on the rate of conversion of daidzein to the intestinal bacterially derived metabolite equol.
Cassidy, 1991
Hypothesis Equol Production
Daidzein
Equol
Carbohydrate Fermentation
↓ LDL
Colonic Microflora
(Bifidobacteria?)
Soy ± FOS Mean LDL Cholesterol
FOS control soy control FOS & soy
N = 23
* Significantly different from FOS control, P<0.05.
Mean LDL Cholesterol
-10 -8 -6 -4 -2 0 2 4 6
0 2& 4
Weeks
% c
hang
e fr
om b
asel
ine
*
Cancer: Butyrate Paradox
• ↑ cell proliferation in colonic crypt
• ↓ proliferation of colon adenocarcinoma cells
Scheppach & Weiler, Curr Opin Clin Nutr Metab Care 2004;7:763-7.
Butyrate:
Colitis: Butyrate Irrigation Study Disease Effect P-value
Harig et al, 1989 DC ↓(5/5) case study
Guellemot et al, 1991 DC ↔ Breuer et al, 1991 UC ↓ ≤ 0.002
Scheppach et al, 1992 UC ↓ <0.01 Breuer et al, 1997 UC ↓ (NS) Steinhart et al, 1996 UC ↔ Cummings, 1997 (review) UC ↔
DC = diversion colitis, UC = ulcerative colitis
Osteoporosis: Rectal Infusion & Ca2+ Absorption
Trinidad TP et al., Am J Clin Nutr 1996;63:574-8.
□ Control (Ca2+ + NaCl)
■ Treatment (Ca2+ & acetate, propionate, or both)
Lactobacillus Therapy for Acute Infectious Diarrhea in Children: A Meta-analysis
Van Niel et al. Pediatrics 2002;109:678-684
C difficile Probiotic (Actimel, Danone) to prevent antibiotics
associated diarrhoea: A randomized double-blind placebo controlled trial (N=134)
Hickson et al. BMJ 2007;335:80
Walkerton. 2000: Animal Husbandry routine antibiotic use for optimal growth = bacterial resistance esp.
E Coli 0157:H7
Antibiotics used in Intensive Animal Husbandry
Lagoons of Fecal effluent from Intensive Animal Husbandry
Summary
• Alterations in colonic fermentation affects lipid metabolism, biomarkers of colon cancer, immune function and calcium absorption
• Probiotics are effective in the treatment of infectious and antibiotic associated diarrhea