treatment of hepatitis b and c - escmid
TRANSCRIPT
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Treatment of hepatitis B and C
Jürgen RockstrohDepartment of Medicine I,
University of Bonn
7th ESCMID Summer School, Regensburg, Germany, 19-25
July
2008
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Global Disease Burden from Bloodborne Viral Infections
HBV 370 million
HCV 130 million
HIV 33 millionHIV/HBV (2-4 million)HIV/HCV (4-5 million)
Estimated no.chronic infections
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Geographic Distribution of Chronic HBV Infection
HBsAg Prevalence>8% - High 2-7% - Intermediate <2% - Low
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Hepatitis B: Genotypes
05
10152025303540
A 34% B 15% C 40% D 6%
North America05
10152025303540
A 40% B 4% C 15% D 35%
North- & Middle-Europe
0
10
20
30
40
50
A 9% B 42% C 46% D 3%
Asia
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Acutehepatitis B
Anti-HBsAnti-HBc
ChronicHBsAg
Anti-HBe HBeAg
HBV-DNAneg
HBV-DNApos
Immune response Immune tolerance
95%
reactivation
clearance
5%
clearance
CirrhosisLiver decompensation
Liver cancer
Natural history of HBV infection
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chronic hepatitis
cirrhosis HCC
HBV infection
5-10% of all infected adults
30%
470.000 deaths yearly
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Treatment Objectives
Improve disease free survival
Prevent liver decompensation and HCC
Prevent progression to cirrhosis
Obtain durable suppression of HBV replication
Treatment endpoints in practiceDecrease serum HBV DNANormalize serum ALT Induce HBeAg/HBsAg loss or seroconversion
Keeffe EB, Dieterich DT et al. 2006;4(8):936-62;
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Chronic Hepatitis B cut-off HBV DNA Viral load
Chen et al. JAMA 2006, Iloeje et al. Gastroenterology 2006
REVEAL Study (prospective cohort study, Tawain)
Persons from 7 cities in Taiwan (30-65 years, n = 89.293)
Inclusion criteria(HBsAg+, HBV DNA Test, no HCC, no HCV: n=3.653)
(in addition no cirrhosis: n=3.582)
Voluntary participation(n = 23.820)
Recruitment
1991 / 1992
Follow-up / AnalysesJuni 2004
Analyses evaluating occurance of cirrhosis/ HCC
(Ultrasound Liver)Restrictions: peri-/postnatal Infection, GT: B/C
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Chronic Hepatitis B cut-off HBV DNA Viral Load
Iloeje,U.H. et al. Gastroenterology 2006
REVEAL Study: cumulative incidence cirrhosis
4,5%5,9%
9,8%
23,5%
36,2%
105-106 cop/ml
>106 cop/ml
<104 cop/ml
104-105 cop/ml
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Chronic Hepatitis B cut-off HBV DNA Viral Load
Chen et al. JAMA 2006
REVEAL Study: cumulative incidence HCC
1,3-1,4%
4%
12%
15%
105-106 cop/ml
>106 cop/ml
<104 cop/ml
104-105 cop/ml
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Chronic Hepatitis B cut-off HBV DNA Viral Load
Chen et al. JAMA 2006
REVEAL Study: cumulative incidence HCC
0,9%
3%
8%
14%
105-106 cop/ml
>106 cop/ml
<104 cop/ml
104-105 cop/ml
HBeAg neg., normal ALT,No cirrhosis
0,7%
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Indication for chronic Hepatitis B Therapy
DGVS and GfV, Consensus Conference, Göttingen 2007
HBsAg positive chronische Hepatitis B
HBsAg positive chronic Hepatitis B
Severe Fibrosis / cirrhosis ?
HBV-DNA ≥104 copies/ml (2 x 10³ IU/ml) Nachweisbare HBV- DNA (PCR)?detectable HBV - DNA (PCR)
yesno
no yes
-
3 (ALT >1.0 ULN),
No therapy -Check every 3 mths
Otherwise every 6 mths
ALT ? 2.0 ULN oderHistologie >geringe
Entzü ndung/geringeFibrose ?
ALT ≥ 2.0 ULN orHistology > low
inflammation /lowFibrosis
Check HBV DNA+ Transaminases
every 3-6 months
Indicationfor therapy
Risk factorsofor HCCother Indications(i.e. extrahepaticmanifestations)?
no yes
no no yes
yes
Indication for therapy
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Before Therapy / Therapy controlRecommendation:In case an indication for HBV therapy exists the following investigations are
recommended to be carried out prior to therapy as well as monitoring of therapy outcome [B]:
Prior to Therapy:• HBV-DNA quantitative• HBV-Genotyping (in case of therapeutic relevance)• clinical-chemical Lab testsDuring Therapy:• HBeAg every 3 Monate, in case of loss of HBeAg control for Anti-HBe• HBV-DNA quantitative (Viremia) after 4-6 weeks and after 12 weeks,
thereafter every 3-6 Months• Under therapy with Nukleos(t)ideanalogues: increase in HBV viremia despite
drug intake (adherence) or in case no initial response is observed Determination of resistance conferring mutations in the HBV Polymerase- Gene
• clinical chemistry every 3 months• HBsAg / Anti-HBs after loss of HBeAg and / or persistent decrease in HBV-
DNA (<103 copies / ml)DGVS and GfV, Consensus Conference, Göttingen 2007
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Treatment algorithm
DGVS und GfV, Consensus Conference, Göttingen 2007
Biochemisches und virologisches Ansprechen nach 6 Monaten ?
(Peg-)Interferon ?yes
no
Nukleod(t)idanalogonmit hoher Resistenzbarriereoder Kombinationstherapie
Jedes zugelassene Nucleos(t)idanalogonAuswahl u.a . nach Viruslast und Komorbiditäten
No cirrhosis Cirrhosis
Therapieweiter
Therapieanpassung je nach Substanz und Biochemie
MonitoringALT und HBV-DNA
alle 3 Monate
HBV-DNA < 200 IU/ml
(1000 Kop/ml)
HBV-DNA > 200 IU/ml
(1000 Kop/ml)
Bei HBV-DNA Anstieg >1log über Nadir
oder persistierendeVirämienach 12 Monaten
Therapieansprechen ?
Therapie 6-12 Monate
yes MonitoringAlle 3-6 Monate
no
Biochemical and virological response after 6 months ?
(Peg-)Interferon ?
Nukleos(t)ideanaloguewith high resistance barrier
or combination therapy
Any licensed Nucleos(t)ideanalogueSelection based on VL and comorbidities
Continue therapy
Adaptation of therapy according toDrug and biochemistry
Monitoringof ALT and HBV-DNA
every 3 mths
HBV-DNA < 200 IU/ml
(1000 cop/ml)
HBV-DNA > 200 IU/ml
(1000 cop/ml)
In case of HBV-DNA increase > 1 log-Over nadir
or persistent viremia > 10³ cop./mlafter 12 months
Therapysuccess ?
Therapy6-12 months
Monitoringevery-3-6 months
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Treatment of HBV
• Interferon
• Lamivudine
• Emtricitabine
• Adefovir dipivoxil
• Tenofovir fumarate disoproxil• Entecavir
•Telbivudine
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Therapy of chronic Hepatitis B with PEG-IFN-α
2b HBeAg pos.
05
10
15
2025
30
35
40
HBeAg - HBV DNA <200.000 GPT normal
35%36%
Res
pons
e ra
te F
U24
[%]
PEG2b+ Plac
PEG2b+ Lami
HBeAg pos.n=266, 52 Weeks
32%27%
35%32%
Janssen et al., Lancet 2005
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IFN Therapy in HBeAg+ Hepatitis B Relevance of different HBV Genotypes
0
10
20
30
40
50
60
A B C D
Janssen,Lancet 2005Erhardt, Gut2005Lau, NEJM2005Wai, Hepatol2002Kao, JHepatol 2000
HBV-Genotype
Resp
on
se r
ate
[%
]
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Favorable Factors for Interferon Therapy
HBV Genotype A
Low viral load (< 106 copies/ml)
Higher liver enzyme elevations
Previously untreated patients
Pegylated Interferon is the preferred interferon
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Therapy of chronic Hepatitis B with PEG-IFN-α
2a HBeAg neg
05
1015202530354045
29%
43% 44%da
uerh
afte
s Ans
prec
hen
[%]
HB
V-D
NA
<20
.000
Kop
/ml
Lami PEG2a PEG2a+ LamiHBeAg neg.
n=537, 48 WeeksMarcellin et al., NEJM 2004
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Placebo (n=215) Lamivudine (n=436)
Liaw YF, et al. N Engl J Med. 2004;351:1521-1531.
0 6 12 18 24 30 36
Dis
ease
Pro
gres
s (%
)
Time to Disease Progression (months)
Lamivudine
Placebo
0
5
10
15
20
25
P=.001
Effect of Rx (lam) on Disease Progression in Patients with Advanced Fibrosis
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Liaw YF, et al. N Engl J Med. 2004;351:1521-1531.
Months
Placebo
Dia
gnos
is o
f HC
C (
%)
10
P = .047
Lamivudine0
60 12 18 24 30 36
Effect of Rx (lam) on Incidence of HCC in Patients with Advanced Fibrosis
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Development of antiviral resistance
0
20
40
60
80
100
Time Time
WildtypeMutant
Start of therapy
Mutation- detection
virological Breakthrough
Histological progression
Trans- aminases
Viral load
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Therapy of chronic HBV with Polymersase Inhibitors
HBeAg neg.: genetic Barrier
10-32
Res
ista
nce
afte
r1 to
5 y
ears
(%)
Lai et al., AASLD 2005 van Bömmel et al., Hepatology 2004Marcellin et al., NEJM 2003 Lai CL et al., NEJM 2006 Colonno et al. EASL 2007
1 2 3 4 5 years
22-4253
70
< 1%3-5%
9-22%
0%3-20%
11%18%
29%
65
0
10
20
30
40
50
60
70
80
Lamivudine Entecavir Telbivudine Adefovir
1 2 3 4 5 years
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low high
antiv
iral P
oten
cy
genetic Barrier
low
high
Lam
LdT
ETVTDF
ADV
Nukleoside-Analogue Nukleotide-Analogue
middle
mod
erat
e
Characteristics of different Nukleos(t)ide- Analogues
(Hepsera®)
(Viread®) (Baraclude®)
(Sebivo®)
(Zeffix®)
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Antiviral potency of different Nucleos(t)ide- Analogues in HBV
8 7 6 5 4 3
log HBV DNA decrease (1 year)
Lamivudine
Entecavir
Telbivudine
Tenofovir
Pradefovir*
Emtricitabine
Valtorcitabine (Day 28)
ANA380*
Clevudine(Week 24)
Adefovir
= Nukleoside Analogue
= Nukleotide Analogue
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ADV vs TDF in HIV/HBV co-infected patients Mean serum HBV DNA
•
↑48
Peters M et al. CROI 2005
N=25N= 27
- 3.12
- 4.03
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Nukleos(t)id-Analogue Resistance-associated Mutations
V84M/S
85A
A181V
/T
V214A
/Q21
5S
N236T
S202I
M250V
M204V
/I
Telbivudine
L180
M
Adapted from: Locarnini S. Monothematic Conference, Istanbul, Turkey, 6-8 October 2005. Yuen M-F & Lai C-L. Expert Rev Anti Infect Ther. 2005;3:489-94. Adapted from: Locarnini S, et al. Antivir Ther. 2004;9:679-93
T184G
/S
Mutations associated with virological breakthrough
Entecavir
Emtricitabine
additional (compensatory) Mutations
Lamivudine
Adefovir/TDF
+or or
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3/50
12/50
29/50
42/50
1/25
9/25
14/25
19/25
0
20
40
60
80
100
HBV-DNA<1000copies/ml
AST<45 U/L loss of HBe-antigen
loss of HBs-antigen
Patie
nts
(%)
TDF TDF+3TC
Tenofovir vs. Tenofovir + Lamivudin (HBV/HIV-coinfection)
Schmutz G. et al. AIDS 2006
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Lamivudin-Resistence Switch to Adefovir versus Add-on
0
20
40
60
80 59%74%
HB
V D
NA
33
Mo.
<40
0 co
p/m
l[%
]an
d B
reak
thro
ugh
[%]
Lampertico et al. AASLD 2006
- HBe-Ag neg.- n=588- Lam.-Resistance- switch vs. add-on- Mean follow-up
33 Months- Kreatinine increase
in 8% of casesAdefovir mono
(n=303)Adefovir+Lamivudine
(n=285)
24%
5%
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Treatment goal and durationIFN: treatment length 48 weeks for PEG INF; goal HBe and HBs-Ag seroconversionfor the nucleoside analogues: HBsAgseroconversion + 6-12 mths.anti-HBV therapy may be stopped cautiously in HBeAg+ patients who have achieved HBe-seroconversion or HBs-seroconversion for at least six monthsThe treatment duration in HBe-Ag negative patients is still not well defined and in mostcases is an ongoing therapyAny oral antiviral HBV herapy can be stoppedonce HBs-Ag seroconversion and anti-HBsTiter > 100 IU/L have been achieved
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The most successful intervention against HBV is the HBV vaccination
Nach Lok et al. Gastroenterology 2004
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Natural Course of Hepatitis C Infection
1640 20 24 28 32 50 75 100128
Weeks
HCV- Infection
Anti-HCV
HCV-RNA
Hepatitis
Transaminases
Normal range for transaminases
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Symptoms of Hepatitis C
FatiqueInefficiencyAbdominal pain or discomfortArthritis
Mostly mild and unspecific
AST / ALT
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50-80% chronicInfection
ChronicHepatitis with
Fibrosis50%
ChronicHepatitis without
Fibrosis 50%
3-5 % / Year
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Extrahepatic Manifestations of Hepatitis C Essential mixed cryoglobulinemia
Palpable PurpuraArthralgiaweakness
Involvement of nerves and kidneypossible
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Distribution of HCV
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Hepatitis C -Possible transmission risk factors
Niederau: Dtsch. Med. Wochensch 2000;127;563-566
No known risk factors39%
Origin from endemic area8%
Intravenous drug use
23%
Doctors/nurses/lab pers.4%
Blood-products 21%
msmGV 3%
Heterosexual contact/ Family contact
2%
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Hepatitis C Distribution of HCV-Genotypes
Simmonds- Classification
41/2/6
3
1/2/3
41
1/2
1/2/31/2/3
1/2 1/2/6
5
1/3
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5´NCR 3´NCRC E2E1 p
7 NS2 NS3 4A 4B 5A 5B
Capside
Envelope
Protease
Protease / RNA Helicase
NS3 Protease Cofactor
RNA Polymerase??
Hypervariable Region
Structure of the Hepatitis C Virus
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Drugs for treatment of Hepatitis C
Pegylated Interferon alfa
1 x weekly
Ribavirin
2 x daily
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Detection limit
Therapy phase
RVR
4 Weeks
cEVR
12
ETR
SVR
GT1/4 12 MonthsGT2/3 6 Months 6 Months
pEVR
2 log-decrease
12 Weeks
HCV Therapy
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Interferon and Ribavirin for treatment of Hepatitis C
0%
10%
20%
30%
40%
50%
60%
70%
Zeuzem1999
(N=267)
Fried2001
(N=453)
Hadziyannis2002
(N=436)
39% 56% 61%54%
Manns 2001
(N=511)
PEG-IFNα-2a
PEG-IFNα-2a+RBV
PEG-IFNα-2a+ RBV
PEG-IFNα-2b+RBV
McHutchison
1998(N=912)IFNα-2b+RBV
Lindsay2001
(N=1219)
PEG-IFNα-2b
36%24%16%
IFNα
Res
pons
e ra
tes(
SVR
)
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Chronic Hepatitis C
Genotype-Determination GT2/3GT1/4-6
Therapy for24 Weeks
HCV quantitative
HCV quantitativedecrease 2 log
Therapy for12 Weeks
HCV PCRqualitative
Therapy forfurther 12 Weeks
Therapy forfurther 24 Weeks
yes
yes
Discontinuation
no
no NPV: 98%
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Individualisied HCV-TherapyShortened treatment duration in the presence of RVR
and/or low baseline viral loadGenotype 1:
Genotypes 2/3:
Genotype 4:
Zeuzem et al. J Hepatol 2006 24 vs. 48 W 89%
Dalgard et al. Hepatology 2004 14 vs. 24 W 90%v. Wagner et al. Gastroenterology 2005 16 vs. 24 W 92% (GT2)
hohe VL (>600KU/ml) 59% (GT3)niedrige VL (<600KU/ml) 85% (GT3)
Mangia et al. N Engl J Med 2005 12 vs. 24 W 87% (GT2)77% (GT3)
Yu et al. Gut 2006 16 vs. 24 W 94% (GT2)
Kamal et al. Gut 2005 36 vs. 48 W 66%
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Individualised HCV-TherapyProlonged treatment duration
in the presence of delayed response
Berg et al. Gastroenterology 2006; 130: 1086 Sanchez-Tapiaz et al. Gastroenterology 2006; 131: 451
p = 0.04
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Adapted from Manns MP et al. Nat Rev Drug Discovery. 2007;6:991-1000.
New Oral Small Molecule Antivirals in Development for the Treatment of HCV
Drug name Drug class Preclinical Phase I Phase II Phase IIIMK-0608 (Merck)
R7128 (Pharmasset & Roche)
NIM811 (Novartis)
ITMN-191 (InterMune & Roche)
MK-7009 (Merck)
BI12202 (Boehringer)
R1626 (Roche)
DEBIO-025 (Debiopharm)
BI 1220 (Boehringer)
Telaprevir (Vertex Pharmaceuticals)
Boceprevir (Schering-Plough)
TMC435350 (Tibotec & Medivir)
Nucleoside polymerase inhibitor
Nucleoside polymerase inhibitor
Cyclophilin inhibitorProtease inhibitor
Protease inhibitor
Protease inhibitor
Nucleoside polymerase inhibitor
Cyclophilin inhibitor
Nucleosite polymerase inhibitor
Protease inhibitor
Protease inhibitor
Protease inhibitor
XX
X
XXXX
XX
XXX
X
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Conclusion:Therapy of Hepatitis C
Presence: Individualized Therapy depending on genotype and kinetics of HCV viral load under combination therapy
Future: Intensified Therapy with use of new HCV drugs targeting specific enzymes in the HCV replication life-cycle
Interferon-Ribavirin combination therapy is the current gold
standard
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Chemoprophylaxis and HCC in Hepatitis C
Meta-Analyses:Larsson
& Wok 2007 (240 000 Persons)
43% Risk
reduction
if
> 2 cups/d
Bravi
et al. 2007 (3800 Patienten)30% Risk
reduction
if
1 cup
/d
55% Risik
reduction
if
>2 cups/ d
Wakai
et al. 2007 (111 000 Persons)Risik
reduction:
1 cup
/d
21%
38%
>2 cup
/d
61%
37%
HCV+
HCV-