Arvind R. Murali, MD Assistant Professor of Medicine Gastroenterology & Hepatology Organ Transplant Center UIHC, Carver College of Medicine

Transcription

1 Arvind R. Murali, MD Assistant Professor of Medicine Gastroenterology & Hepatology Organ Transplant Center UIHC, Carver College of Medicine

2 No financial disclosures No conflicts of interest No affiliations with any pharmaceutical company Recommendations on HCV treatment regimens are based on AASLD/IDSA guidelines

3 Epidemiology of HCV infection Who to screen for HCV infection? Clinical Manifestations of HCV Factors influencing treatment of HCV Treatment of HCV HCV in pregnancy Acute HCV infection

4 56 yo male with past history of HCV infection is referred to you for evaluation. Hepatitis C antibody test is positive AND hepatitis C RNA test is negative. What is the next step? a. Start Sofosbuvir-Ledipasvir for 12 weeks b. Start Sofosbuvir and ribavirin for 24 weeks c. Check hepatitis C genotype to help determine anti-viral regimen d. No evidence of current HCV infection and no treatment is required

5 All but which of the following patients should be offered one-time HCV testing? a. All persons born between 1965 and 1985 b. 45-yo male using intravenous drugs c. 55 yo female on maintanence hemodialysis d. Child born to a HCV-infected mother

6 A 26 year old pregnant woman at 28 weeks gestational age is noted to have positive hepatitis C RNA. HCV genotype is 1b. What is your next step in management? a. Start elbasvir/grazoprevir for 12 weeks b. Start glecaprevir/pibrentasvir for 8 weeks c. Start sofosbuvir/velpatasvir for 12 weeks d. Treatment is not recommended during pregnancy

7 You see a 55 yo old male with history of IVDU in your clinic. HCV antibody is positive and HCV PCR indicates high viral load. You obtain a liver ultrasound which shows a 2cm liver lesion. What do you do next? 1. Repeat Ultrasound in 6 months. 2. Start treatment for hepatitis C. 3. Obtain MRI and if suggestive of HCC refer to a transplant center. 4. Start treatment for HCV, obtain MRI, and refer to a transplant center.

8 HCV - One of the main causes of chronic liver disease worldwide Long-term impact of HCV infection on liver disease is highly variable ranging from minimal histological changes extensive fibrosis and cirrhosis hepatocellular carcinoma (HCC)

9 About 180 million chronically infected persons worldwide An estimated 3.5 million persons in the United States are HCV-infected 2.7 million in the general non-institutionalized population 800,000 - incarcerated, institutionalized, or homeless Most people infected with HCV are unaware of their infection - In the US, about half of all infected people are unaware they are infected

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12 In 2012, CDC recommended to offer a one-time HCV test to all persons born from 1945 through 1965, without prior ascertainment of HCV riskfactors. Reasoning? Persons in the 1945 to 1965 birth cohort accounted for nearly three-fourths of all HCV infections, a five-time higher HCV prevalence (3.25%)

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14 All persons requiring HCV testing should first be tested for HCV antibody (anti-hcv) using an FDAapproved test A positive test result for anti-hcv usually but not always imply current infection Positive HCV antibody test indicates either current (active) HCV infection (acute or chronic) past infection that has resolved, or a false-positive test result

15 All patients with HCV antibody positive HCV nucleic acid test (NAT) to detect viremia to confirm current (active) HCV infection In patients with negative anti-hcv ab test but are immunocompromised (HIV, chronic hemodialysis) exposure to HCV within the last six months To detect re-infection in persons after previous spontaneous or treatment-related viral clearance Get HCV RNA directly in these patients

16 An FDA-approved quantitative or qualitative NAT with a detection level of 25 IU/mL or lower should be used to detect HCV RNA Positive HCV viral load confirms current infection Positive anti-hcv test and negative HCV RNA PCR No evidence of current (active) HCV infection, additional HCV testing is typically unnecessary Only when there is a high index of suspicion for recent infection, HCV RNA test can be repeated (3-6 months)

17 Hepatic Acute hepatitis, cirrhosis, HCC Non-hepatic manifestations Mixed Cryoglobulinemic Syndrome B-Cell Non-Hodgkins Lymphoma Type 2 MPGN Sicca Syndrome Porphyria Cutanea Tarda Lichen Planus Moorens Corneal Ulcers

18 MCS is a small to medium vessel vasculitis characterized by production of cryoglobulins Cryoglobulins - immune complexes of polyclonal immunoglobulin (Ig)G and monoclonal or polyclonal IgM with rheumatoid factor that precipitate at lower temperatures Fix complement - lead to endothelial tissue damage and vasculitis As high as 90 % of cases of MCS are associated with chronic HCV

19 Dermatological manifestations palpable purpura Other manifestations Arthritis Non-healing ulcers Peripheral neuropathy Central nervous involvement, and Glomerulonephritis Diagnosis confirmed by the presence of - cryoglobulins - elevated rheumatoid factor & - immunofluorescence of complement fixing IgM in tissues

20 HCV RNA viral load HCV genotype Co-existing HIV infection Co-existing Hepatitis B infection Presence or absence of cirrhosis If cirrhosis, compensated or decompensated Do they have CKD/ESRD Presence of HCC Transplant Candidate

21 There are currently 11 different genetic strains (genotypes) of hepatitis C virus (HCV) in the world Highest prevalence is seen with genotypes 1 through 7 Testing for HCV genotype helps to guide selection of the most appropriate treatment regimen

22 Genotype 1 is the most common HCV genotype in North America and Europe Accounts for nearly 80% of all infections in the U.S HCV genotype 1 - subtypes 1a, 1b, and 1c Genotype 2 is the second most common HCV genotype in the U.S. About 10% of all infection Genotype 2 - subtypes 2a, 2b, and 2c

23 Genotype 3 endemic to southeast Asia and some parts of Australia, and India HCV genotype 3 - about 6% of Americans Genotype 3 - two main subtypes: 3a and 3b Genotype 4 - Africa, Middle East, Egypt Genotype 5 Southern Africa Genotype 6 China, Hong Kong Genotype 7 Thailand, Congo

24 All patients considered for HCV treatment must have testing hepatitis B surface antigen and surface antibody hepatitis B core antibody HbsAg positive treat HBV prior to starting HCV treatment HbsAg and HbsAb are negative but HBV core Ab positive significant risk of re-activation of hepatitis B while on treatment for HCV HBV re-activation can lead to liver failure and death. 24 cases of re-activation were identified by FDA 2 deaths and 1 LT Closely monitor liver enzymes and liver function tests while on HCV treatment

25 Severity of liver disease - A key factor in determining treatment and follow up evaluation of patients with HCV Patients with advanced liver disease may have a lower response to HCV therapy but they are the most likely to derive the greatest survival benefit A liver biopsy is the gold standard in estimating the severity of liver inflammation/fibrosis but is rarely used due to risk of complications

26 Blood tests platelet count, INR, APRI index Liver imaging (eg, ultrasound, CT scan) can be used to assess liver surface nodularity and spleen size Serum fibrosis marker panels such as Fib4, Fibrospect Liver Elastography measurement (Fibroscan/US/MRI) provides instant information regarding liver stiffness can reliably distinguish patients with a high versus low likelihood of cirrhosis

27 ***If there is a liver lesion on ultrasound and HCC is suspected, do not start treatment for HCV. Patients with suspected HCC should be referred to a transplant center for evaluation and management of HCC.

28 Sustained Virological Response (virologic cure) continued absence of detectable HCV RNA for at least 12 weeks after completion of therapy SVR durable in more than 99% of patients followedup for 5 years Patients in whom SVR is achieved have HCV antibodies but no longer have detectable HCV RNA in serum, liver tissue, or mononuclear cells

29 SVR is associated with Substantial improvement in liver histology, decrease in the risk of progression to cirrhosis >70% reduction in the risk of liver cancer (hepatocellular carcinoma [HCC]) 90% reduction in the risk of liver-related mortality and liver transplantation

30 Reduces symptoms from cryoglobulinemic vasculitis, a condition affecting 10% to 15% of HCV-infected patients HCV-infected persons with non-hodgkin lymphoma and other lymphoproliferative disorders achieve complete or partial remission in up to 75% of cases Substantially improved quality of life, which spans their physical, emotional, and social health Persons who have successfully achieved SVR (virologic cure) no longer transmit the virus to others

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32 1. NS3/4A Protease Inhibitors - Inhibits cleavage of polyprotein - Ends with previr 2. NS5A Inhibitors - Blocks virus protein NS5A needed for virus reproduction and infection Ends with asvir 3. NS5B polymerase Inhibitors - Inhibits RNA polymerase NS5B thus preventing virus replication - Ends with buvir

33 Elbasvir-Grazoprevir (Zepatier) Genotypes 1, 4 (12 weeks *no cirrhosis/comp cirrhosis) Ledipasvir-Sofosbuvir (Harvoni) Geno 1, 4, 5, 6 (12 weeks *no cirrhosis/comp cirrhosis) Glecaprevir-Pibrentasvir (Mavyret) Geno 1-6 (8 wks no cirrhosis, 12 wks comp cirrhosis) Sofosbuvir-Velpatasvir (Epclusa) Genotypes 1-6 (12 wks *no cirrhosis/comp cirrhosis) *All treatment naïve

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41 Treatment experienced Peg-interferon/ribavirin experienced NS3 protease inhibitor (telaprevir, boceprevir, simeprevir) NS5B inhibitors (eg: sofosbuvir) NS5A inhibitors (eg: ledipasvir, elbasvir, daclatasvir) HCV/HIV co-infection Post-Liver Transplant Chronic Kidney disease HCV in Pregnancy

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45 Acute HCV infection - defined as presenting within 6 months of the exposure Both HCV antibody and HCV RNA testing are recommended when acute HCV infection is suspected Pre-exposure or post-exposure prophylaxis with antiviral therapy is not recommended 20% to 50% chance of spontaneous clearance of the infection in 6 months

46 Counsel patients with acute HCV infection to avoid hepatotoxic insults - hepatotoxic drugs (eg, acetaminophen) and alcohol consumption Counseling to reduce the risk of HCV transmission Referral to an addiction medicine specialist is recommended for patients with acute HCV infection related to substance use Repeat HCV RNA in 6 months to determine if spontaneous clearance of HCV has occurred If HCV RNA is persistent beyond 6 months after diagnosis of acute HCV then patient has chronic HCV and needs to be treated

47 A vast number of people infected with HCV are unaware of their infection Patients born between 1945 to 1965 should be screened for HCV even without any risk factors Patients with anti HCV antibody positive should receive HCV RNA test to confirm current infection. No treatment indicated if HCV RNA is negative Provide recommendations for counseling those with active HCV infection

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49 Several DAA regimens are available to treat HCV. Treatment should be based on HCV viral load, genotype, presence or absence of cirrhosis and if they treatment naïve or experienced HCV treatment is recommended before considering pregnancy if possible, avoid during pregnancy 20-50% spontaneous clearance of HCV after acute infection, do not treat unless the HCV RNA is persistent at 6-12 months (chronic HCV)

50 56 yo male with past history of HCV infection is referred to you for evaluation. You obtain hepatitis C antibody test and it is positive but the hepatitis C RNA test is negative. What is the next step? a. Start Sofosbuvir-Ledipasvir for 12 weeks b. Start Sofosbuvir and ribavirin for 24 weeks c. Check hepatitis C genotype to help determine anti-viral regimen d. Inform patient that there is no evidence of current HCV infection and no treatment is required

51 All but which of the following patients should be offered one-time HCV testing? a. All persons born between 1965 and 1985 b. 45-yo male with history of intravenous drug abuse c. 55 yo female on hemodialysis d. Child born to a HCV-infected mother

52 A 26 year old pregnant woman at 28 weeks gestational age is noted to have positive hepatitis C RNA. HCV genotype is 1b. What is your next step in management? a. Start elbasvir/grazoprevir for 12 weeks b. Start glecaprevir/pibrentasvir for 8 weeks c. Start sofosbuvir/velpatasvir for 12 weeks d. Inform patient that treatment is not recommended during pregnancy due to lack of safety and efficacy data

53 You see a 55 yo old male with history of IVDU in your clinic. HCV antibody is positive and HCV PCR indicates high viral load. You obtain a liver ultrasound which shows a 2cm liver lesion. What do you do next? 1. Repeat Ultrasound in 6 months 2. Start treatment for hepatitis C and repeat Ultrasound in 3-6 months 3. Obtain MRI and if suggestive of HCC refer to a transplant center 4. Start treatment for HCV, obtain MRI, and refer to a transplant center

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56 Alcohol HCV patients be counseled regarding the deleterious effects of alcohol Strong association between use of excess alcohol and the development of/progression of liver fibrosis and HCC in patients with HCV infection Daily consumption of more than 50 grams of alcohol has a high likelihood of worsening fibrosis

57 Hepatitis B virus (HBV) infection and human immunodeficiency virus-1 (HIV) co-infection - associated with poorer prognosis of HCV Persons with HCV should be tested for HIV antibody and hepatitis B surface antigen (HBsAg)/ core antibody using standard assays for screening Counseled on how to reduce their risk of acquiring these infections, including through HBV vaccination

58 Patients with obesity and metabolic syndrome having underlying insulin resistance are more prone to have nonalcoholic fatty liver disease NAFLD is a risk factor for fibrosis progression in HCV-infected persons HCV-infected persons who are overweight (BMI> 25 kg/m 2 ) or obese (BMI > 30 kg/m 2 ) be counseled regarding strategies to reduce weight and improve insulin resistance via diet, exercise, and/or medical therapies

59 Patients with HCV infection and hyperlipidemia or cardiovascular comorbidities may also benefit from various hypolipidemic drugs Prospective studies - demonstrated the safety and efficacy of statins in patients with chronic HCV even in those with compensated cirrhosis Statins and other hypolipidemic agents should not be withheld in HCV-infected patients

60 Persons with HCV infection should be counseled to avoid sharing toothbrushes and dental or shaving equipment, and be cautioned to cover any bleeding wound to prevent the possibility of others coming into contact with their blood. Persons should be counseled to stop using illicit drugs and enter substance abuse treatment. Those who continue to inject drugs should be counseled to avoid reusing or sharing syringes, needles, water, cotton, and other drug preparation equipment; use new sterile syringes and filters and disinfected cookers; clean the injection site with a new alcohol swab; and dispose of syringes and needles after one use in a safe, puncture-proof container. Persons with HCV infection should be advised not to donate blood and to discuss HCV serostatus prior to donation of body organs, other tissue, or semen. Persons with HIV infection and those with multiple sexual partners or sexually transmitted infections should be encouraged to use barrier precautions to prevent sexual transmission. Other persons with HCV infection should be counseled that the risk of sexual transmission is low and may not warrant barrier protection. Household surfaces and implements contaminated with visible blood from an HCV-infected person should be cleaned using a dilution of 1 part household bleach to 9 parts water. Gloves should be worn when cleaning up blood spills.