nuevos mecanismos y nuevos tratamientos€¦ · insuficiencia hepatica aguda nuevos mecanismos y...
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![Page 1: NUEVOS MECANISMOS Y NUEVOS TRATAMIENTOS€¦ · INSUFICIENCIA HEPATICA AGUDA NUEVOS MECANISMOS Y NUEVOS TRATAMIENTOS Andres T Blei Northwestern University Feinberg School of Medicine](https://reader030.vdocuments.site/reader030/viewer/2022011901/5f08aace7e708231d4232350/html5/thumbnails/1.jpg)
INSUFICIENCIA HEPATICA AGUDAINSUFICIENCIA HEPATICA AGUDANUEVOS MECANISMOS Y NUEVOS TRATAMIENTOSNUEVOS MECANISMOS Y NUEVOS TRATAMIENTOS
Andres T Blei
Northwestern University Feinberg School of Medicine
XXVII Jornadas de la Sociedad Canaria de Patologia Digestiva
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ACUTE LIVER FAILURE STUDY GROUPACUTE LIVER FAILURE STUDY GROUPFunded by NIH R03, FDA Orphan Grant,
R01 (‘00-’05), now U-01 (‘05-10)
• 14 sites initially 1998, now 23
• Also 25 pediatric sites, since 2000
• 1,050 cases in adult, 500 in pediatric registry
• Prospective clinical data, serum, DNA, tissue
• Therapy trial: NAC for non-APAP ALF
• Numerous ancillary studies in progress
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INSUFICIENCIA HEPATICA AGUDAINSUFICIENCIA HEPATICA AGUDA
• Etiologia
• Mecanismos de injuria hepatica
• Manejo de la Insuficiencia Hepatica Aguda
• Tratamiento
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INSUFICIENCIA HEPATICA AGUDAINSUFICIENCIA HEPATICA AGUDA
• Etiologia
• Mecanismos de injuria hepatica
• Manejo de la Insuficiencia Hepatica Aguda
• Tratamiento
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117
72
3053
3616 9 7
46
139
0
30
60
90
120
150
180
210
240
270
300
330
360
390
420
A
ETIOLOGY OF ALF IN THE USA:ETIOLOGY OF ALF IN THE USA:Adult Registry (n = 973)Adult Registry (n = 973)
ACM Drug HepB IschemicHepA AIH Wilson’s Budd-Chiari
IndeterPreg-nancy
Other
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83/68
55/26
31/49
11.8/19.7
2622/1740
52/50
3.0/6.0
48/48
48.0/41.0
HepA/HepBn=29/69
78576774Sex (% F)
3541429Transplant (%)
15.822.720.94.5Bili (median)
6748995864248ALT (median)
42493952Coma ¾ (%)
6.08.08.00.0Jaundice (Days)(median)
60636471Overall Survival (%)
30262563Spontaneous Survival (%)
42.038.042.036.0Age (median)
All Othersn=159
Indeterminaten=131
Drugn=111
ACMn=407
COMPARISON OF DIFFERENT ALF ETIOLOGY GROUPSCOMPARISON OF DIFFERENT ALF ETIOLOGY GROUPS
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Cytochrome p450 2E1
(phase I)
OH
HNC
CH3
O
Sulfation
Glucur
onida
tion
(phase II)
Nontoxic Metabolites
NC
CH3
O
O
GSH
glutathione-S-transferase
HNC
CH3
O
OHSG
Mercapturic Acid(nontoxic)
NAPQI(highly reactiveintermediate) Hepatocyte Damage
• Covalent binding to cellproteins, including enzyme itself
• ADDUCTS
CYTOCHROME P450 LEADS TO THE FORMATION OF UNSTABLE COMPOUNDS!
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Hepatology 2006; 44: 765-768
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INDETERMINATE ALF
• Occult hepatitis B• Parvovirus B19• SEN virus• CMV• EBV• Herpes virus 6• Unsuspected acetaminophen
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Gender M:F 30:68 (69% F)Mean Age 44 yrsRace/Ethnicity:Cauc/AA/Hisp/Other 54/17/16/11
Causality: High prob/Prob/Poss 44/38/16
Outcomes:Survive w/o Transplant 23%Transplanted 41%Died 36%
SPECTRUM OF DRUGSPECTRUM OF DRUG--RELATED ALF: N=98RELATED ALF: N=98
Reuben A, (in preparation)
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Anti-TB drugs: 168 INH without other anti-TB drugs5 INH + rifampin + pyrazinamide1 INH + ethambutol2 rifampin + pyrazinamide
Sulfa-related drugs : 6TMP/SMX, sulfadiazine, sulfasalazine
Other antibiotics: 81 Amox-clavulanate, 6 nitrofurantoin, 1 ciprofloxacin,1 doxycycline, 1 itraconazole
SPECTRUM OF DRUGSPECTRUM OF DRUG--RELATED ALF: N= 98RELATED ALF: N= 98
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Miscellaneous:• Phenytoin 6; Valproate 1; PTU 4; Disulfiram 4
• Statins : 1 Atorvastatin; 2 Cerivastatin
• Herbals and/or dietary supplements: 9 –including 2 Kava-Kava
• HAART: 2• Halothane/Isoflurane: 2• Bromfenac (Duract®): 4Troglitazone (Rezulin®): 4
SPECTRUM OF DRUGSPECTRUM OF DRUG--RELATEDRELATEDACUTE LIVER FAILURE: IIACUTE LIVER FAILURE: II
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DIAGNOSIS OF FULMINANT WILSONDIAGNOSIS OF FULMINANT WILSON
• Markers of copper metabolism: Low specificity– Ceruloplasmin– Serum copper– 24 hr urine copper
• Standard liver chemistries– BR/Alk phos ratio– AST/ALT ratio
Schilsky et al, submitted
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166650N =
Wilson DiseaseNon-acetaminophen
Acetaminophen
Ser
um C
oppe
r µg/
dL450
400
350
300
250
200
150
100
50
0
Schilsky M, submitted
SERUM COPPER SERUM COPPER AND THE DIAGNOSIS OF FULMINANT WILSONAND THE DIAGNOSIS OF FULMINANT WILSON’’S DISEASES DISEASE
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166951N =
Wilson DiseaseNon-acetaminophen
Acetaminophen
Alk
alin
e P
hosp
hata
se:T
otal
Bilir
ubin
100
90
80
70
60
50
40
30
20
100
167151N =
Wilson DiseaseNon-acetaminophen
AcetaminophenA
ST:
ALT
ratio
20
15
10
5
0
ROUTINE LIVER CHEMISTRIESROUTINE LIVER CHEMISTRIES
AND THE DIAGNOSIS OF FULMINANT WILSONAND THE DIAGNOSIS OF FULMINANT WILSON’’S DISEASES DISEASE
Schilsky M, submitted
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INSUFICIENCIA HEPATICA AGUDAINSUFICIENCIA HEPATICA AGUDA
• Etiologia
• Mecanismos de injuria hepatica
• Manejo de la Insuficiencia Hepatica Aguda
• Tratamiento
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DIFFERENT PATHWAYS TO CELL DEATH
AASLD, Post Graduate Course 2006
Necrosis(e.g. reperfusion injury,hypoxia, cholestasis)
Paraptosis
Anoikis(caused by hepatocyte
detachment)
Death Stimulus
Apoptosis(e.g. FHF, (N)ASH, cholestasis)
Autophagy(e.g. reperfusion injury)
Mitoticcatastrophe
e.g. death receptor ligands, TNF,bile acids, ischemia/reperfusion, ROS
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TWO PATHWAYS TO APOPTOSISTWO PATHWAYS TO APOPTOSIS
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SPECIFIC ENTITIESSPECIFIC ENTITIES
• Hepatic ischemia– Ischemia-reperfusion: Necrosis/autophagy
• Hepatitis B– Effector-cells
• CTL, NK, NKT cells
• Acetaminophen– Metabolic activation– Innate immune system
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MECHANISM OF HEPATOCYTE DEATHMECHANISM OF HEPATOCYTE DEATHIN VIRAL HEPATITISIN VIRAL HEPATITIS
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OVAL CELLS OVAL CELLS ACETAMINOPHENACETAMINOPHEN--INDUCED ALFINDUCED ALF
CK-18 (+) staining of oval cells after APAP injury
Hepatology 2005; 41:1252-60
Sham PBS APAP
8.077.60
9.65
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INSUFICIENCIA HEPATICA AGUDAINSUFICIENCIA HEPATICA AGUDA
• Etiologia
• Mecanismos de injuria hepatica
• Manejo de la Insuficiencia Hepatica Aguda
• Tratamiento
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MANEJO DE MANEJO DE LA INSUFICIENCIA HEPATICA AGUDALA INSUFICIENCIA HEPATICA AGUDA
• Terapeuticas especificas
• Multiples complicaciones
• Trials clinicos de sistemasartificiales/bioartificiales
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N-ACETYLCYSTEINE
Acetaminophen -induced ALF
• Controlled trial• ↑ survival vs. controls • 48% (12/25) vs.
20% (5/25)p = 0.037, [95% CI 3% to 53%]
BMJ. 1991; 303:1026-9
Mechanism of benefitMice:Improves mitochondrial tricarboxylic acid (TCA) cycle metabolism by stimulation of carbon flux through PDH
Hepatology 2006; 43:454-63
Humans:Better hemodynamics/ O2 transport
But, ↓ Systemic Vasc Resist.
Improved cerebral oxygenation But, contradictory results
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TREATMENT FOR OTHER ETIOLOGIESTREATMENT FOR OTHER ETIOLOGIES
• Herpetic hepatitis– 141 cases identified– 37% treated with iv
acyclovir, 4.2±1.8 days after symptom onset
– Death• Treated: 47%• Non-treated: 70%
– OLT• 4 died• 1 recurrent HSV
Levitsky J, Blei AT (submitted)
• Acute fatty liver of pregnancy– Delivery
• Amanita phalloides– Charcoal– Iv Penicillin
• Autoimmune hepatitis– ? Role of steroids
• Hepatitis B– ? lamivudine
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MANEJO DE MANEJO DE LA INSUFICIENCIA HEPATICA AGUDALA INSUFICIENCIA HEPATICA AGUDA
• Terapeuticas especificas
• Multiples complicaciones
• Trials clinicos de sistemasartificiales/bioartificiales
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Management of ALFRecommendations of the ALF Group
• NOT RECOMMENDED– For Bleeding Prophylactic
FFP– For Circulatory dysfunction Vasopressin
(submitted for publication)
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TERLIPRESSIN IN ALFTERLIPRESSIN IN ALF
• Intracranial Pressure • Cerebral Blood Flow
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Management of ALFRecommendations of the ALF Group
• NOT RECOMMENDED– Bleeding Prophylactic
FFP– Circulatory dysfunction Vasopressin
– Cerebral edema Corticosteroids
– Renal failure IntermitentHemodialysis
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Management of ALFRecommendations of the ALF Group
• RECOMMENDED– Surveillance cultures/empiric antibiotics
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US ACUTE LIVER FAILURE STUDY GROUPInfection and HE in Acute Liver Failure
Gastroenterology 2003;125:760-66
▲ and ● = pts with infection prior to worsening of HE,suggesting a pathogenic role for infection.
and = pts in whom infection was a later eventGastroenterology 2003;125:755-64
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MANAGEMENT OF ALFRECOMMENDATIONS OF THE ALF GROUP
• RECOMMENDED– Surveillance cultures/empiric antibiotics– Enteral nutrition– Gastric anti-secretory agents– Correction of hypo/hyperglycemia– Norepinephrine for circulatory dysfunction– Continuous renal replacement– Adrenal insufficiency
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CIRCULATORY SUPPORTAdrenal Insufficiency
-200
0
200
400
600
800
1000
1200
Baseline Increment Peak
Cor
tisol
/ nm
ol/L
SurvivorsNon survivors
P < 0.002 P < 0.001
SST response abnormal in non-survivors.
Hepatology 2002:36:395-402
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BRAIN EDEMA IN ALF
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CONTROVERSIES IN BRAIN EDEMAICP MONITORING
Bernuau J, Durand F Wendon J, Larsen F
Hepatology August 2006 Hepatology August 2006
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CORRECTING THE COAGULOPATHYCORRECTING THE COAGULOPATHYRecombinant factor VIIRecombinant factor VII
• However,– 2/6 bleeds in the ALF
report occurred on rFVII
– Thromboticcomplications reported (n=4)
Can J Anesth 2005
– Insufficient data to recommend routine use of rFVII
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INDUCING HYPERNATREMIA INDUCING HYPERNATREMIA TO PREVENT TO PREVENT ↑↑ ICPICP
Increase in serum sodium Reduction of ICP
Murphy et al, Hepatology 2004; 39:464-70
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WHO GETS BRAIN EDEMA ?WHO GETS BRAIN EDEMA ?
• Hyperacute Liver Failure
• Concomitant role of other osmotic challenges– Hyponatremia– Hyperglycemia
• Increased cerebral blood flow– Terlipressin experience– Measures that reduce CBF reduce ICP
• Indomethacin administration• Mild hypothermia
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0 4 8 120
10
20
30
40
5032 C
Intr
acra
nial
Pre
ssur
e (m
mHg
)
Time (hours)
TEMPERATURE AND ICPTEMPERATURE AND ICPNOTNOT--CANDIDATES FOR OLT CANDIDATES FOR OLT
Jalan et al. 1999 and 2004
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PROS AND CONS OF MILD HYPOTHERMIA
• Pros– Animal studies show
prevention of brain edema
– Animal studies show ↑ survival in models of ALF
– Wider use in ICU: Standard of care as neuroprotectant after cardiac arrest
• Cons– Cannot be used at
early stage of ALF– Concern with
possible side effects• Infection• Pancreatitis
– Concern with possible impairment of hepatic regeneration
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MANEJO DE MANEJO DE LA INSUFICIENCIA HEPATICA AGUDALA INSUFICIENCIA HEPATICA AGUDA
• Terapeuticas especificas
• Multiples complicaciones
• Trials clinicos de sistemasartificiales/bioartificiales
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“Well, I do have this recurring dream that one day I might see results.”
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LARGE CLINICAL TRIALS
COMPLETED• BioArtificial Liver
– 171 pts US, Europe– 11 sites Commercial sponsor
IN PROGRESS• NAC for non-Acetaminophen induced ALF
– Aims at ~ 200 pts US– 19 sites Sponsored by NIH
• Large volume plasmapheresis in ALF– Aims at ~ 180 pts Europe– 3 sites No commercial sponsor
• MARS for severe ALF– Aims at 110 pts France– 16 sites Sponsored by French Ministry
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DIFFICULTIES WITH TRIALS IN ALF
• Large number of centers but relatively few patients each
• Control group: Standard Medical Therapy– Management protocols not well defined– Control of multiple variables– No Sham therapy
• Liver Transplantation, a major modifier• Lumping or splitting the disease ?
NEED FOR LIVER SUPPORT SYSTEMS HAS NEVER BEEN GREATER
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NONNON--ACETAMINOPHEN ACETAMINOPHEN -- INDUCED ALFINDUCED ALFNAC TRIALNAC TRIAL
• Double-blind Randomized Controlled Trial • 3 days of iv NAC (150 mg/day) vs placebo• Wide range of etiologies• 175 patients entered• DSMB overview
– Discontinued November 23, 2006 – Futile to continue the study
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PRINCIPLES OF BALPRINCIPLES OF BAL
CharcoalColumn
Plasma Separator
Pump
Reservoir
Oxygenator/Heater
Bioreactorwith
Hepatocytes
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SURVIVAL WITHSURVIVAL WITHBIOARTIFICIAL LIVERBIOARTIFICIAL LIVER
Ann Surg 2004;239:664
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RANDOMIZED CONTROLLED TRIAL RANDOMIZED CONTROLLED TRIAL HIGH VOLUMEHIGH VOLUME PLASMAPHERESIS
begun 1998; 2nd interim analysis; n=120; P=0.06 by COX analysis)
FS Larsen et al. Unpublished data[145 of 182 patients enrolled 10/1/2006]
0 7 14 21 28 35 42 49
Time (days)
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
nonHVP/nonLTx (n=31)
HVP/nonLTx (n=51)
nonHVP/LTx (n=20)
HVP/LTx (n=16)
CumulativeProportionSurviving
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THREE TYPES OFTHREE TYPES OFALBUMIN DIALYSISALBUMIN DIALYSIS
Am J Gastroenterol. 2005 Feb;100(2):468-75
Single Pass Albumin Dialysis (SPAD)
Prometheus
Molecular Adsorbents Recirculating System(MARS)
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SURVIVAL WITH MARSSURVIVAL WITH MARSACUTEACUTE--ONON--CHRONIC LIVER FAILURECHRONIC LIVER FAILURE
0
0,2
0,4
0,6
0,8
1
0 10 20 30
Cumulativesurvival
Hospital days
SMT (n=11)
SMT + MARS (n=12)
p<0.05
Hepatology 2002; 36:949-958
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MARS FOR HEPATIC ENCEPHALOPATHY MARS FOR HEPATIC ENCEPHALOPATHY IN ACUTEIN ACUTE--ONON--CHRONIC LIVER FAILURECHRONIC LIVER FAILURE
NS31 ± 231 ± 2 MELD
NS13 ± 113 ± 1Child-Pugh
1219HE Grade 4NS
1920HE Grade 3
p valueSMT n=31
MARSn=39
Hassanein et al, Submitted for publication
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PRIMARY ENDPOINT (ITT)PRIMARY ENDPOINT (ITT)Improvement in HEImprovement in HE
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
0 12 24 36 48 60 72 84 96 108 120
hours
cum
mea
n nu
m im
prov
emen
ts
MARS
SMTp = 0.044
n = 70
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WHAT DO WE DO IN 2006 ?WHAT DO WE DO IN 2006 ?
OPTIMIZE INTENSIVE CARE
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IT TAKES A VILLAGE TO BUILD A LIVERIT TAKES A VILLAGE TO BUILD A LIVER
BLOODIn Flow
ScaffoldProteins
Stem cells
HedgehogNotchWnt Signaling
Factors
Nutrients
Nature Biotech 2005;23:1237-9
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PROMETHEUS AND THE EAGLE
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ACETAMINOPHEN (APAP) ADDUCTS ASSAYACETAMINOPHEN (APAP) ADDUCTS ASSAY
• HPLC-EC detects APAP-cysteine residues
• Highly sensitive and specific
• Remains positive up to 9 days after ingestion
• Present in 20% of indeterminate cases, peds and
adults
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Davern TJ, et al. Gastroenterology 2006;130:687-94
A B C D E
nmol
AP
AP
-CY
S /
mg
prot
ein
0.0
0.5
1.0
1.5
2.0
2.5
3.0A
ceta
min
ophe
n-C
YS (u
mol
/L)/m
g pr
otei
n
Patient Group
Known APAP
Other ALF
APAPNo tox
Indeterminate with adducts
n=7
Indeterminaten=29
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ACETAMINOPHEN ADDUCTS ACETAMINOPHEN ADDUCTS IN VIRAL HEPATITIS ALFIN VIRAL HEPATITIS ALF
• 72 patients with ALF due to HAV or HBV; 10 + APAP controls
• All patients were anti-HBc or HAV IgM positive
• 9/72 (12%) overall (17% HAV and 10% HBV)
• 8/9 had a history of APAP ingestion (all < 4 gm/d)
• Adduct levels: APAP 5.58 nmol/mL vs AVH-APAP 0.45 nmol/mL (AVH-APAP levels are 1/10 APAP OD)(Pos adducts = > 0.02 nmol/mL)
Polson J, et al. Poster DDW: May 2006
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HERPETIC HEPATITISHERPETIC HEPATITIS
• Herpetic hepatitis– 141 cases identified– 37% treated with iv acyclovir, 4.2±1.8 days after
symptom onset– Death
• Treated: 47%• Non-treated: 70%
– OLT• 4 died• 1 recurrent HSV
Levitsky J, Blei A (submitted)
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ACETAMINOPHEN ADDUCTS ACETAMINOPHEN ADDUCTS IN VIRAL HEPATITIS ALFIN VIRAL HEPATITIS ALF
The admission serum ALT and total bilirubinlevels differed among the 3 groups (p<0.002).
ALT T Bili Died*(IU/L) (mg/dl)
AVH only 1,580 19.8 27%APAP-AVH 2,658 9.7 67%APAP 5,570 5.0
* P = 0.017
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BINDING TO DEATH RECEPTORSBINDING TO DEATH RECEPTORS
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THE BRAIN IN ALFTHE BRAIN IN ALFFOUR CLINICAL SCENARIOSFOUR CLINICAL SCENARIOS
• Development of HE– Search for precipitants !– Insufficient data lactulose/ non-absorbable
ATB• Agitation
– Will culminate in intubation– Propofol
• Short half-life• < cerebral vasodilatation
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THE BRAIN IN ALF # 3 – SUBCLINICAL SEIZURE ACTIVITY
• Controlled trial of phenytoin
• Randomized controlled trial of phenytoin
7/10(70%)
2/11(22%)
BE at autopsy
50%25%Pupil ab-normal
40%15%SCSeizure
Control(n=22)
Phen(n=20)
Hepatology. 2000; 32:536-41
68%70%Death
12/2210/22Mech.Ventil.
15/2216/22Brain edema
25%22%SCSeizure
Control(n=22)
Phen(n=22)
J Hepatol 2004; 41:89-96
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BRAIN EDEMA IN ALF
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ALF Study GroupMONITORING OF ICP
SURVIVAL POST-OLT
Liver Transplantation 2005; 11:1581-9
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UNRECOGNIZED BRAIN EDEMAIN PATIENTS LISTED FOR OLT
Liver Transplantation 2005; 11:1581-9
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WHO GETS BRAIN EDEMA ?WHO GETS BRAIN EDEMA ?
• Hyperacute Liver Failure
• Concomitant role of other osmotic challenges– Hyponatremia– Hyperglycemia
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MILD HYPOTHERMIA FOR BRAIN EDEMAMILD HYPOTHERMIA FOR BRAIN EDEMARats after PCA receiving an NHRats after PCA receiving an NH33 infusioninfusion
OSMOTIC DISTURBANCE
↑ CBF
GLYCOLYSISOXIDATIVE STRESS
CYTOKINE BINDING TO E.CELLSX
X
X
Cooling
X
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MILD HYPOTHERMIA IMPROVES SURVIVAL IN ACETAMINOPHEN (APAP) - MICE
Gastroenterology (in press)