HIV and Viral Hepatitis - WordPress.com · anicteric. Moderate ascites was noted on exam. Liver was...
Transcript of HIV and Viral Hepatitis - WordPress.com · anicteric. Moderate ascites was noted on exam. Liver was...
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HIV and Viral Hepatitis
Brian Montague, DO MS MPH Assistant Professor of Medicine Division of Infectious Diseases
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Clinical Case
• 18 year old Ugandan female, no prior medical history presented with 3‐4 week history of increased abdominal girth and RUQ pain. She has no known hx of hepatitis. She was anicteric. Moderate ascites was noted on exam. Liver was grossly enlarged with marked firmness on palpation. Hepatitis B surface antigen was positive. Liver ultrasound confirmed presence of ascites, as well as a large mass in the liver.
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Outline
• Why focus on hepatitis • Burden of disease • Transmission • Prevention • Management of chronic viral hepatitis (B/C) • First steps
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Why Focus on Hepatitis?
• Liver disease leading cause of mortality amongst persons living with HIV – High rates of coinfection on those with hx of IVDU
– Acute outbreaks amongst MSM
– Advancing liver diseases complicates ART selection
Soriano et al.Antiviral Research 85 (2010) 303–315
Fig. 1. Estimated number of individuals with HIV, HBV and HCV worldwide
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Why Don’t We Focus on Hepatitis?
• Challenges discussing substance abuse
• For HCV: – treatment is long and difficult (and a money losing proposition)
– Difficulty implementing treatment in typical clinical practice
• For HBV: – complacency based on efficacy of ART against HBV – burden of disease is greatest in regions with least capacity to monitor treatment
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BURDEN OF DISEASE TRANSMISSION AND PREVENTION MANAGING CHRONIC HEPATITIS
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HIV and Viral Hepatitis
Hwang and Cheung NAJMS. 2011;4(1):7‐13 http://data.unaids.org/pub/globalreport/2008/2008_globalreport_graphics_presskit_en.pdf
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Disease Priorities: Where is Hepatitis? Recent “Priority” Areas • HIV • Malaria • TB
Neglected Tropical Diseases* • Buruli Ulcer • Chagas disease(American trypanosomiasis) • Cysticercosis • Dengue/dengue haemorrhagic fever • Dracunculiasis (guinea‐worm disease) • Echinococcosis • Fascioliasis • Human African trypanosomiasis • Leishmaniasis • Leprosy • Lymphatic filariasis • Onchocerciasis • Rabies • Schistosomiasis • Soil transmitted helminthiasis • Trachoma • Yaws • Podoconiosis • Snakebite • Other 'neglected' conditions:
NCDs • Ischaemic and hypertensive heart disease • Stroke • Rheumatic heart disease • DM • COPD • Cancers • Depression and major psychoses • Road traffic accidents • Maternal and perinatal mortality • Malnutrition • ...
*WHO
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Liver Disease Associated Mortality
Lim & Kim. Clinics in Liver Disease 2008; 12(4):L733-746
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Trends in Perimortal Diagnoses for Persons with HIV
Disease Pre‐HAART
Early HAART
Contemporary HAART
Septicemia 10.7 12.9 11.6
Kidney Disease 7.8 9.4 11.7
Liver Disease (excl viral hepatitis) 4.9 8 10.8
Viral Hepatitis 1.2 3.4 10.9
GI Bleed 1.5 2.1 1.8
Ischemic Cardiac Disease 0.7 0.9 1.9
• In US, impact is driven primarily by hepatitis C
Hooshyar. AIDS. 2007 Oct 1;21(15):2093‐100.
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Do Patients Live Long Enough to Experience Complications?
Xu. Shanghai Hepatitis Cohort Journal of Gastroenterology and Hepatology (2003) 18, 1345–1352
• Shanghai Hepatitis B Cohort • Mean age of diagnosis 34 without cirrhosis 37.9 with cirrhosis • > 10 years follow‐up
Events occuring on average in age group 50‐60 years
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Shanghai Hepatitis B Cohort
Xu. Shanghai Hepatitis Cohort Journal of Gastroenterology and Hepatology (2003) 18, 1345–1352
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Hepatitis C
• Natural History – Approximately 85% of those infected remain chronically infected
– Median time to cirrhosis 30 years with significant variability based on lifestyle and other factors
• In most parts of the world infection happening in teens to early adult years based on risk fctors
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Survival Impact of Hepatitis C
Niederau eta l. HEPATOLOGY Vol. 28, No. 6, 1998
? Slower disease progression in children but studies in this area are sorely lacking
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Increased Rates of Progression with HIV
Benhamou HEPATOLOGY October 1999
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Geographic Variability
Asia • Largely vertical transmission
of Hepatitis B • Iatrogenic transmission of
Hepatitis C
Africa • Significant early childhood
transmission of Hepatitis B • Iatrogenic transmission of
Hepatitis C
• Earlier onset of hepatocellular carcinoma – Assoc with environmental
aflatoxin exposure
Natural history data from Africa is very limited.
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BURDEN OF DISEASE
TRANSMISSION AND PREVENTION MANAGING CHRONIC HEPATITIS
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Transmission of Hepatitis
• Fecal/Oral – Hepatitis A – Hepatitis E
• Vertical – Hepatitis B, less commonly D
• Close Contacts/Sexual – Hepatitis B, D, less commonly C
• Iatrogenic (injections, transfusions) – Hepatitis B and C
Sanitation and hygeine
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WHO Global Database on Blood Safety
Africa • 95% of African countries were testing 100% of units for HIV • 83% of countries were testing for HBV • 53% for HCV,
• Goal is to have 100% of the blood screened by 2012 for all of these TTI
markers – Of the 155 countries that reported performing 100% screening for HIV, only 71
screen in a quality‐assured manner defined as: • laboratories follow documented standard operating procedures • Employment of an external quality assessment scheme.
Asia • In Asia all blood is 100% tested for HIV and HBV (except in Indonesia
which tests 97%) • HCV testing has not been initiated in all countries
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Screening Strategies
Vermeulen & Reddy ISBT Science Series (2010) 5, 308–313
• Serology Positive, NAT negative: 22 samples for HIV, 71 for HBV, 86 for HCV
• Additional diagnoses by NAT: 84 HIV, 232 HBV, 4 HCV
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Infections Attributable to Unsafe Injections
Kane et al. Bull WHO 199 77(10)
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Vaccination • Hepatitis B
– Effective vaccine with 3 dose series – Standard and accelerated vaccine schedules – Birth dose vaccine
• Limitations
– Potential reduced efficacy in immunocompromised and ESRD patients – Cold chain – Out of hospital births
• In Development
– Trials double dose vaccine – Vaccines with increased immunogenicity
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Immunogenicity of HepB Vaccine in Patients with HIV
Parischa et al. BMC Infectious Diseases 2006, 6:65
•Study of antibody response to hepatitis B vaccine comparing patients with “high” CD4 count (>200) to low CD4 count (<200). No protective response noted in any persons with CD4 < 50
Therapeutic titers defined as > 100
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Vaccines in Development • Hepatitis E
– No currently approved vaccine – Trial Nepal 2007 showed efficacy in predominantly young male cohort – Chinese vaccine in phase 3 trials
• Hepatitis C
– Genetic diversity and mutability of virus has hindered vaccine development
• Hepatitis D – Limited study – Given that infection requires preexisting hep B, hep B vaccination
primary prevention target
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BURDEN OF DISEASE TRANSMISSION AND PREVENTION
MANAGING CHRONIC HEPATITIS
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Clinical Case
• 38 year old HIV + man, diagnosed with hepatitis B 2 years prior. Patient symptomatic with RUQ pain, no jaundice. At time of dx, elevation in ALT noted at 146. Patient started on ART with AZT, 3TC and nevirapine. ALT improved to 46 at recheck after 1 year and patient experienced some symptomatic improvement. On f/u today, he has mild RUQ pain, ALT 92. No jaundice. No stigmata of cirrhosis.
• What do you do now?
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AASLD Guidelines: Eag Positive
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AASLD Guidelines: Eag Negative
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HIV and Hepatitis B Coinfection
• Key antiretrovirals have activity against hepatitis B – Lamivudine (resistance mutations emerge after median 18m)
– Tenofovir use increasing (durable response though breakthroughs may occur)
• Limited screening, does it change management? – Earlier ART? – Earlier HCC screening?
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Is There a Role for Interferon?
• HBV genotypes A & B more responsive • May be considered if no indication for HIV treatment
• As we treat HIV earlier, role for interferon may be reduced
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Monitoring Hep B on HAART • HBV DNA at baseline
• Follow‐up HBV DNA until suppression (3m, 6m then q6m)
• HCC Screening (ultrasound) 2005 guidelines
– Subsaharan Africans from age 20 – Asian males >40 females >50 – Caucasians >50 – Cape Verde? Immigrants from Asia in childhood? African Americans?
• Revised criteria based on risk in any given population exceeding threshold. How do you know?
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Defining Treatment Response
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Adapting for Resource Limited Settings
• Standard Protocols – ALT monitoring feasible – HBV DNA cost prohibitive and rarely used ($150‐$200)
– Lamivudine 1st line, but response not durable – Interferon feasible, but monitoring much less strict (and may be more expensive)
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Impact of HDV on Outcome HIV/HBV
Sheng et al. HIV/AIDS • CID 2007:44
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Considerations for Tx HDV
• 3TC shows little activity against HDV • TDF/FTC may reduce HDV replication somewhat • Interferon, TDF/FTC combinationreported • HDV viral load available for monitoring
Lau et al. HEPATOLOGY Vol. 30, No. 2, 1999
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Hepatitis C • Criteria for Treatment
– Detectable HCV RNA – Active inflammation as measured by transaminitis or biopsy
• Treatment – Pegylated interferon + ribavirin (+/‐ small molecules)
• Monitoring with treatment – CBC, LFTs monthly – TSH q12 w – HCV RNA baseline, +/‐ 4w, 12w, q12w until tx complete – More frequent lab tests may be necessary if significant cytopenias or
hepatic inflammation develops
• Counseling regarding ETOH use, pregnancy risk and ribavirin, etc.
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Monitoring IFN/RBV Treatment
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Risks Associated with Treatment
• Autoimmune thyroiditis (~15%) • Cytopenias
– Anemia (RBV) – Thrombocytopenia (IFN) – Neutropenia (IFN)
• Decompensated Cirrhosis • Depression/Mania • Severe infections
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Adapting for Resource Limited Settings
• HCV quantitative RNA, if available, is expensive. Cost $160‐$200.
• How often will patient be seen? • There are 50 patients behind them in line, how much counseling will they receive?
• Can they afford the lab tests, much less the medications?
• Do the risks of treatment outweigh the benefits?
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Hepatitis C Treatment Response
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Treatment Decision Tree HIV/Hep C
V. Soriano et al. / Antiviral Research 85 (2010) 303–315
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Impact of HIV Response to Tx
V. Soriano et al. / Antiviral Research 85 (2010) 303–315
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Anticipating Small Molecules
Seden et al. J Antimicrob Chemother 2010; 65: 1079–1085
• Concern for interactions regarding boceprevir/telaprevir and Pis, NNRTIs, Maraviroc
• May provide rationale for early treatment with deferred ART if cases identified early enough
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Considerations for ART in Cirrhotics
• Abacavir CP 5‐6 dose adjust >6 contraindicated
• Nevirapine contraindicated • Fosamprenavir only PI not contraindicated with advanced cirrhosis
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Clinical Case
• 18 year old female, biopsy was performed, pathology showed HCC
• Palliative care team in hospital visited the patient and gave support
• She was discharged home without further treatment
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One Step at a Time Strategies • Blood bank safety • Safe injection technologies • Education to family contacts regarding transmissability of
Hep B and Hep C • Counsel patients regarding ETOH and herbal medicine use • Maternal screening for Hep B and birth dose vaccine
– Monovalent vaccine for household contacts +/‐ with prescreening
• Targeting tenofovir roll out where supplies are limited to those who are HBV positive
Prevention is Key!
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QUESTIONS? [email protected]