hbv, hcv / hiv coinfection · coinfection rate 0.02% 0 3.7% karuru .j and lule g n eamj april 2005...
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HBV, HCV / HIV Coinfection
衛生署 疾病管制局
中區傳染病防治醫療網
王任賢 指揮官
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Epidemiology
• HBV endemic in Africa/Asia/South America• low prevalence in the west
• HCV high prevalence in Europe/USA/North and South Africa• increasing incidence in some regions of
sub-Saharan Africa
• HIV global epidemic • sub Saharan Africa worst hit
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Liver disease: a major cause of death in the HAART era
1. Rosenthal E, et al. AIDS 2003; 17: 18032. Puoti M, et al. JAIDS 2000; 24: 211
3. Martín-Carbonero L, et al. AIDS Res Human Retrovirus 2001; 17: 14674. Soriano V, et al. Eur J Epidemiol 1999; 15: 1
5. Bica I, et al. Clin Infect Dis 2001; 32: 492
Mortality from end-stage liver disease as a percentage of all deaths among HIV patients
0
10
20
30
40
50
60
Mor
talit
y (%
)
Italy (Brescia)2 Spain (Madrid)3,4 USA (Boston)5
13%
35%
5%12%
45%50%
Pre-HAART eraHAART era
France (Nice)1
1.5%
14%
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Routes of Transmission
Blood/ Blood products
Mother to child
Sexual
Hep B +++ ++ ++
Hep C +++ + +
HIV +++ +++ +++
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Transmissibility throughcontaminated injections
• HBV 30%
• HCV 3%
• HIV 0.3%
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Hepatitis B Virus
• Member of Hepadnaviridae that primarily infectsliver cells
• Known carcinogen • 100 times more infectious than HIV• 10 times more infectious than HCV
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Name Abbreviation Definition/Comment
Hepatitis B Surface Antigen HBsAg Antigen indicating infection
HBV Deoxyribonucleic Acid HBV DNA Indicates active viral replication
Alanine Aminotransferase ALTAn enzyme produced in the liver.
Increases in ALT levels are often associated with liver cell inflammation or liver cell injury
Hepatitis B Core Antibody anti-HBc
Appears at the onset of symptoms in acute hepatitis B
and persists for life. The presence of anti-HBc indicates previous or ongoing infection with hepatitis B virus (HBV) in
an undefined timeframe.
Hepatitis B Surface Antibody anti-HBs Usually indicates immunity
Hepatitis B e Antigen HBeAgAntigen correlating with HBV replication and infectivity, but low or undetectable in patients with precore or core mutation
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HBV Disease
• ACUTE HBV• CHRONIC HBV (6months)
All HBsAg POSITIVE ---HBeAg positive---HBeAg negative
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Chronic Hepatitis B: Definition
Diagnosis made based on supportive clinical and laboratory features.
HBsAg-Positive≥6 months
The EASL Jury. J Hepatol 2003; 39:S3–S25Keeffe EB, et al. Clin Gastroenterol Hepatol 2006; 4:936–962.
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Geographic Distribution of Chronic HBV Infection
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HBV Genotypes
This is an oversimplification as populations are not static…
F
CD
E
A
DD
D
C
Ba
F
A,B,C,D
Bj
A,B,C,D
F
AD
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Chronic HBV: Clinical Features • Symptoms
– General: fatigue, anorexia, arthralgia, nausea– Advanced: ascites, edema, bleeding GE varices, bruising, enlarged
spleen, jaundice, spider nevi, muscle wasting
• Symptoms may not correlate with liver biopsy findings
HBV DNA HBsAg HBeAg ALT (U/L)
+ + +/– Normal to ↑
Dienstag, et al. In: Harrison’s Principles of Internal Medicine, 15th ed. Chap 297.Mahoney. Clin Microbiol Rev. 1999;12:351-366.McMahon. Semin Liver Dis. 2004;24:17-21. CDC. Epidemiology and Prevention of Vaccine-Preventable Diseases. Atkinson W, et al, eds. 9th ed. 2006.
Anti-HBc (IgM) and Anti-HBs will also be negative for patients with chronic hepatitis B.
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Natural Progression of CHB
Adapted from: Fattovich, et al. Gastroenterology. 2004;127:S35-S50. Torresi, et al. Gastroenterology. 2000;118:S83-S103. Fattovich, et al. Hepatology. 1995;21:77-82. Perrillo, et al. Hepatology. 2001;33:424-432.
Chronic Infection Cirrhosis
Liver Failure
Liver Cancer (HCC)
Death30%
23% in 5 yr
Liver Transplantation
Acute flare
10%–15% in 5 yr
5%–10%
15%–40% of CHB patients may experience disease progression
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Factors Influencing Natural History
Fattovich. Semin Liver Dis. 2003;23:47-58.Chen, et al. JAMA. 2006;295:65-73.
Age at infection
Viral mutations
GenderHBV viral
load Host immune
status
Co-infection withHCV or HIV
HBeAgstatus
Alcoholuse
Disease progression
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HBV and HIV Coinfection
• 70-90% of HIV patients have evidence of past or active HBV infection.
• HBsAg chronic carriage varies with regions but ranges from 1.9% to over 40% 1
• Lodenyo et al in S.Africa found HBV/HIV coinfection of 41% 2
• Similar studies from Kenya report equally high figures (Ogutu et al, Lule et al, Okoth et al)
Ref: 1. Sinicco A, et al. Coinfection and superinfection of hepatitis B virus in patients infected with HIV. Scand J Infect Dis 1997: 29:111-52. Lodenyo H, et al. Hepatitis B and C virus infections and liver function in AIDS patients at Chris Hani Baragwanath Hospital, Johannesburg. EAMJ Vol 77 No. 1 January 2000, p13
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Influence of HBV on HIV
CONFLICTING DATA• Increased rate of HIV progression to AIDS? 1
• No change in progression? 2
• Cohort studies suggest that HBV does not appear to influence the progression of HIV.
Ref : 1.Eskild A, Magnus P, et al. Hepatitis B antibodies in HIV-infected homosexual men are associated with more rapid progression to AIDS. Aids 1992:6:571-42. Diamondsstone LS, Blakly SA, et al. Prognostic factors for all-cause mortality among hemophiliacs infected with human immunodeficiency virus. Am J Epidemiol 1995:142:304-13
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Influence of HIV on HBV
• Lower rates of clearance of HBeAg• Increased serum HBV DNA viral load 1
• Reactivation of hepatitis in asymptomatic carriers
• Increased liver injury• Faster fibrosis cirrhosis and HCC• Higher mortality and morbidityRef: 1. Perillo RP, Regenstein FG, et al. Chronic hepatitis B in asymptomatic homosexual men with
antibody to the human immunodeficiency virus. Ann Intern Med 1986:105:382-3
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HIV Co-infection Increases the Risk ofEnd-Stage-Liver-Disease (ESLD) due to HBV
• MACS, 4,967 men – HIV, 47%– HBV, 6% (n=326)– HIV/HBV, 4.3% (n=213)
• HIV/HBV: 17-fold higher risk of liver death compared to HBV alone
• Alcohol and low CD4 even increase the risk
Liver Mortaility by HIV and HBV Status
0 0.8 1.7
14.1
0
5
10
15
No HIVor HBV
HBVonly
HIVonly
HIVandHBV
Thio C et al. Lancet 2002;360:9349.
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Relevant Investigations
• When to screen?• What to screen for?
– LFTS, HBsAg, HBeAg,– HBV-DNA
• On indication– Imaging– Liver biopsy– (Fibroscan)
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When to Treat
HBV DNA (IU/mL)• HBeAg + 20,000• HBeAg – 2,000
1 IU/mL = 5 to 6 copies/mL
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Nucleoside/nucleotideanalogues
Interferon-alfa
Treatment Options for CHB
Antiviral action
Antiviral action
Immunomodulatory action
T helper cell
Natural killer cell
Cytotoxic T cell
Antigen presenting cell
B cell
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Treatment Options
AVAILABLE DRUGS
• Nucleoside/ nucleotide analogues– LAM(3TC), ADV, ETV, FTC, TDF
• Newer agentsTELBUVIDINE (LdT),CLEVUDINE, PREDOFOVIR
• Interferons - conventional-pegylated
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Aims of Therapy forHBeAg-positive CHB
• Short-term measurable ‘surrogate’ markers of treatment efficacy– recommended endpoint: HBeAg seroconversion1
– other endpoints: HBV DNA suppression, ALT normalisation
• Long-term goals– prevent/stop/reduce
• liver necrosis• progression to cirrhosis, decompensated cirrhosis or HCC
• Ultimate goal– HBsAg seroconversion– prolong ‘event-free’ survival
1. Lok, McMahon. Hepatology 2004 (AASLD Guidelines)
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Treatment of HBeAg-Negative Chronic Hepatitis B
• With nucleotide/nucleoside analogs• With interferons (conventional/pegylated)
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Challenges Of Therapy
• Rational drug use– Both require treatment– Treat HBV alone or treat HIV alone
• Screening?• Liver biopsy?• Treatment complications and their
management• Viral resistance
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Lamivudine (LAM,3TC) Monotherapy for HBV• Resistance rates (HBV)1st year - 15 – 32%2nd year - 38%3rd year - 56%4th year - 67%
Emergence of mutants associated withphenotypic resistance, viral breakthrough, with frequent hepatic failure.
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Adefovir (ADV)Monotherapy for HBV
• Resistance rates (HBV)• 70 HBeAg negative patients 5 years of therapy
with ADV1 year - 0%2 years - 3%3 years - 11%4 years - 18%5 years - 29%Hadziyannis et al Hepatology 2005; 42:754
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Combination Therapy
• NUCLEOS(T)IDES? – TRUVADA
• NUCLEOS(T)IDE + PEGYLATED INF– PEGaLAM STUDY
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Treatment Goals in CHB: RemissionDifferences between the two strategies
Maintained Remission
=
Reduction in viraemia
ALT normalisation
Continued need for antiviral drugs
VIRAL CONTROL ONLY
Sustained Remission
=
Reduction in viraemia
ALT normalisation
No need for antiviral drugs
IMMUNE CONTROL
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Local Experience
• LAM MONOTHERAPY• OTHER NUCLEOTIDE ANALOGUES• PEGYLATED INTERFERONS
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U/UCIRES
ssARN +, 9.5 kb
Hepatitis C Virus
55-65 nm
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Weekly Epidemiological Record. N° 49, 10 December 1999, WHO
>170 Million Infected Worldwide 3-4 Million New Cases/Year
NORTH & SOUTH
AMERICA 13 M
AFRICA 32 M
EASTERN MEDITERRANEAN
21 M
SOUTHEAST ASIA 32 M
AUSTRALIA 0.2 M
EUROPE 9 M
WESTERN PACIFIC
62 M
Hepatitis C: A Global Health Problem
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Hepatitis C Genotypes
- In Europe. 20 %- i.v. drugs- India >80%- Thailand >70%
-In Europe <10%- in US >15%
5
2
1ca
b
3a
b
b
ca
4
6South-East-
Asia>30% in some
areas
South Africa (>50%)
Middle East : >80%
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HCV
• Lule et al in 1995 found the prevalencerate of HCV to be 2.8% among patientswith chronic liver disease in KenyattaNational Hospital.
• Mwangi (1998), found a prevalence rate of1.8% in blood donors.
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Acute Hepatitis C
Chronic Hepatitis 75%-85 %
Cirrhosis 20 %
10-20 years
Hoofnagle JH Hepatology. 1997;26 (suppl 1): 15S-20SDi Bisceglie, Hepatology, 2000
Natural History of Hepatitis C
Most patients with chronic HCV infection are asymptomatic
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HCV HIV Co-infection
• Worldwide 170 Million Chronic HCV Carriers• Estimated global prevalence 3% with
regional differences up to 40%• In specific populations
– IDUS coinfected 50-90% 2
– Hemophiliacs coinfected 85% 1
Ref: 1. Dieteich DT, et al. Activity of combination therapy with interferon alfa-2b plus ribavarin in chronic hepatitis c patients co-infected with HIV. Semin Liver Dis 1999:19. Suppl 1:87-942. Huemer HP, et al. Correlation of hepatitis c virus antibodies with HIV-1 seropositivity in intravenous drug addicts. Infection 1990:18:122-3
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Worldwide prevalence of HCVin patients with HIV infection
Asia26%
Europe3
34%*75%†
Spain4
69%*88%†
USA1,2
16%*89%†
Australia5
13%*
30% of patients with HIV infection are co-infected with HCV; among HIV-infected intravenous drug users (IVDUs), this figure rises to 75–90%
* General HIV-infected population
† IVDU population
1. Sherman K, et al. Clin Infect Dis 2002; 34: 8312. Strasfeld L, et al. J Acquir Immune Defic Syndr 2003; 33: 356 3. Rockstroh J, et al. 9th European AIDS Conference 2003; Abstract F12/44. Roca B, et al. J Infect 2003; 47: 1175. Dore G and Sasadeusz J, ed. Australasian Society for HIV Medicine 2003
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HCV/HIV in Kenya
POPULATION STUDIED
• 6184 blood donors• 353 VCT attendants• 458 medical inpatients
COINFECTION RATE
0.02%0
3.7%
Karuru .J and Lule G N EAMJ April 2005 Vol 82 No4
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Impact of Co-infection• HIV accelerates the clinical course of HCV-related liver
disease:– Faster time to cirrhosis1–2
– Faster time to HCC3
– More patients develop cirrhosis within a given time frame– Alcohol has an additional aggravating effect
• HCV co-infection:– Increases the risk of antiretroviral drug-associated hepatotoxicity– Dampens the CD4 response to antiretroviral therapy during
treatment4
1. Soto B, et al. J Hepatol 1997; 26: 12. Mohsen A. Gut 2003; 52: 10353. Giordano T, et al. 2nd IAS Conference on HIV Pathogenesis and Treatment 2003; Abstract 2134. Braitstein P, et al. 2nd IAS Conference on HIV Pathogenesis and Treatment 2003; Abstract 214
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Investigations
• Liver function tests• Screening test for HCV antibody• HCV viral load• HCV genotype• ?liver biopsy/fibroscan/imaging
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Indications for HCV Treatment
• Well-controlled HIV (ART or CD4 ›350 cells/mm³)
• Histological evidence of advanced Hepatitis C-related liver disease (fibrosis or cirrhosis)
• HIV therapy interrupted by recurrentART-induced hepatotoxicity
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Available Treatment
Combination therapy:
• Interferons (pegylated)
• Ribavirin
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Predictors of Success of Treatment
• Rapid virological response (RVR) (4 weeks)
• Early virological response (EVR) (12 to 16 weeks)
• Sustained virological response (SVR) (6 months after stopping treatment)
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Genotype and Response to Therapy in HCV (PegIFN + RBV)
GENOTYPE DURATION OF TREATMENT
SUSTAINED VIRAL RESPONSE (SVR)
2 and 3 SHORT (78-81%)4,5,6 LONG ONGOING TRIALS1 LONG 70%
• IN ALL GROUPS RVR HAVE HIGHER SVR RATES
• THE LOWER THE HCV RNA, THE HIGHER THE SVR
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12%
n=285
20%
n=286
40%
n=289
Combination Therapy Superior
p=0.008
p<0.001
p<0.001
SVR defined as <50 IU/mL HCV RNA at week 72; ITT
SVR
(%)
0
10
20
30
40
50
60
Conventional INF+ RBV
PEG-IFN+ placebo
PEG-IFN+ RBV
Torriani F, et al. N Engl J Med 2004; 351: 438
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Future Treatments
• Enzyme Inhibitors- HCV-RNA polymerase inhibitor- HCV-Protease Inhibitor
• Combinations With Each Other and/or PEG-INF + RBV
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Challenges
• Screening issues• Complications and management
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Drug interactions in Co-infection
• DDI and D4T plus interferon/ribavirin cause mitochondrial toxicity(Avoid in HCV/HIV)
• ZIDOVUDINE with ribavirin associated with higher anemia rates.
• SOME NRTIs,all NNRTIS and PIs are hepatotoxic requiring frequent LFTs.
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Take Home• HBV/HCV + HIV is common• Screen For HBV in HIV infection• HBV vaccination for all HIV+ patients who are HBsAg-• Treat HBV where indicated and carefully select your
nucleotidesScreen for HCV in selected patients locally
• Treat HCV where indicated/possible• Beware of hepatotoxicity and dangerous
combinations
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THANK YOU!