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Roadmap for Management of Patients with Chronic Hepatitis B (CHB) Prof. Xinxin Zhang Rui Jin Hospital Jiao Tong University 1 2 Contents Introduction Presentation Objectives Data Review: Associations of HBV DNA with Outcomes i. Natural history studies ii. Impact of treatment Key role of HBV DNA in On-Treatment Management i. Timing and magnitude of HBV DNA suppression On-Treatment Roadmap Concept Summary and Conclusions 3 Introduction Treatment challenges highlight need for new management approach Treating hepatitis B virus (HBV) infection continues to be a challenge for physicians due to – Complications arising from chronic HBV (CHB) – The increasing number of available therapeutic options Treatment guidelines recognize the importance of monitoring and evaluation of treatment response; however, a standard on-treatment management approach does not exist To establish a new treatment paradigm, we should ask – Does long-term suppression of HBV replication achieve the goals of treatment in CHB? – Can the degree of on-treatment viral suppression predict outcomes? – Does profound, early viral suppression at week 24 predict clinical outcomes? – Can a Roadmap concept help achieve the goals of treatment in CHB? 4 Presentation Objectives To explore the association between persistent viraemia and hepatitis disease progression To assess the relationship between the degree of viral suppression and clinical outcome To assess the role of early and effective viral load reduction and the association with clinical outcomes* To review an on-treatment management strategy – the roadmap concept – that may offer a valuable opportunity for enhanced treatment response * For safety information on the products referred to, please refer to the Product Information. 5 Data Review: Associations of HBV DNA with Outcomes i. Natural history studies Correlation Between HBV DNA and Histologic Activity Index (HAI) in Untreated Patients HAI at baseline 12 10 8 6 4 r=0.78; P=0.0001 2 0 0 2 4 6 8 10 12 Baseline HBV DNA level, log10 copies/mL Review of 26 prospective clinical trials found a statistically significant correlation between viral load level and histological grading Mommeja-Marin et al 2003 6 7 Cirrhosis: Association with Baseline HBV DNA Taiwan natural history study Cumulative incidence of cirrhosis, % 40 Multivariate adjusted hazard ratio HBV DNA at entry, copies/mL: >1,000,000 10,000–999,999 1000–9999 300–999 P<0.001 (log-rank test) <300 30 6.5 20 5.6 10 2.5 1.4 1.0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Year of follow-up Iloeje et al 2006 8 Hepatocellular Carcinoma (HCC) Association with baseline HBV DNA: Taiwan natural history study Cumulative incidence of HCC, % 20 HBsAg-positive, untreated participants (n=3,653) 14.9 15 12.2 10 5 3.6 1.3 1.4 <300 300–103 0 103–104 104–106 >106 HBV DNA at baseline, copies/mL Chen et al 2006 Evidence for Association Between HBV DNA and Clinical Outcomes Natural history studies demonstrate – Lower HBV DNA levels are associated with better underlying histology – High HBV DNA may be an independent predictor for cirrhosis and HCC – Sustained suppression of HBV may reduce long-term risk of cirrhosis and HCC Hypothesis needs to be proven prospectively 9 10 Data Review: Associations of HBV DNA with Outcomes ii. Impact of treatment Correlation Between HBV DNA and Histologic Activity Index (HAI) in Treated Patients HAI improvement from baseline 5 4 3 2 r=0.96; P<0.000003 1 0 –1 1 2 3 4 5 –2 Median HBV DNA level decrease from baseline, log10 copies/mL Consistent relationship in treated and untreated patients HBV DNA could be used as a marker of efficacy Mommeja-Marin et al 2003 11 Viral Suppression at Week 72 is Associated with Histologic Improvement Patients with histological response at week 72, % 100 HBeAg-negative patients (n=537) treated with lamivudine, peg-interferon alfa-2a, or both combined for 48 weeks 80 P<0.001 60 56 40 32 20 0 116/208 105/329 <20,000 ≥20,000 HBV DNA at week 72, copies/mL Marcellin et al 2004 12 13 Viral Suppression Significantly Impacts Disease Progression Patients with disease progression, % HBeAg-positive patients (n=651) treated with lamivudine or placebo 25 20 Placebo Lamivudine – YMDDm Lamivudine – Wild type 15 21% 13% 10 5% 5 0 0 6 12 18 24 30 36 Months Liaw 2005 14 Viral Suppression Improves Outcomes Studies reporting associations with outcomes Outcome Citation(s) Improved clinical outcomes after response to interferon alfa (HBeAg+ or HBeAg-) – Niederau et al 1996 – Papatheodoridis et al 2001 – van Zonneveld et al 2004 – Lin et al 2005 Improved clinical outcomes with lamivudine long-term viral suppression – DiMarco et al 2004 – Liaw et al 2004 – Papatheodoridis et al 2005 Decreased clinical events, improved Child-Pugh scores, decreased HCC in patients with advanced liver disease treated with lamivudine – Liaw et al 2004 Improved virological, biochemical, and clinical parameters in lamivudine-resistant patients with decompensated cirrhosis treated with adefovir – Schiff et al 2004 15 Key Role of HBV DNA in On-Treatment Management i. Timing and magnitude of HBV DNA suppression Rapid and Profound HBV Suppression: a Critical Goal of Therapy Primary goal of treatment Outcomes Sustained suppression of HBV replication to the lowest possible level Delay in progression to cirrhosis and HCC Improved survival Reduced resistance Increased seroconversion Improved liver histology Normalised alanine aminotransferase (ALT) levels Fontana 2003; Gauthier et al 1999; Keeffe et al 2006; Liaw et al 2004; Liaw et al 2005; Mommeja-Marin et al 2003; Niederau et al 1996; Yuen et al 2001 16 17 Viral Suppression with Peg-Interferon alfa-2a Association with subsequent HBV DNA response Patients with HBV DNA <20,000 copies/mL at 72 weeks (%) 100 HBeAg-negative patients (n=176) treated with peg-interferon alfa-2a for 48 weeks 80 61 P<0.001 60 40 31 20 0 <400 ≥400 Serum HBV DNA level at 12 weeks, copies/mL Farci et al 2005 18 Profound, Early Viral Suppression Week 24 viral load and 2-year outcomes† with telbivudine and lamivudine HBeAg-positive (n=921) HBeAg-negative (n=446) PCR-negative at 2 years, % 100 100 82 80 73 80 61 60 Telbivudine Lamivudine 88 78 68 60 60 63 60 40 40 40 28 25 20 20 0 7 203 146 ≤QL 57 63 300– 3 log 83 79 3–4 log 107 165 >4 log 20 20 5 0 178 157 18 ≤QL 20 300– 3 log 16 24 3–4 log 10 20 >4 log HBV DNA at week 24, copies/mL QL=quantification limit (polymerase chain reaction (PCR)-undetectable at <300 copies/mL by COBAS® Amplicor™) †Preliminary data from locked database Di Bisceglie et al 2006 19 Profound, Early Viral Suppression Week 24 viral load and 1-year outcomes with entecavir HBeAg-positive HBeAg-negative PCR-negative at week 48, % 100 96 100 97 95 84 82 80 80 60 60 40 40 40 40 25 20 20 0 153/195 28/34 47/118 6/15 ≤400 400– 3 log 3–5 log >5 log 0 240/247 ≤400 20/21 400– 3 log 32/38 3–5 log 1/4 >5 log HBV DNA at week 24, copies/mL BMS Entecavir AVDAC Briefing Document 2005 20 Magnitude of Viral Response to Lamivudine Association with higher rates of HBeAg seroconversion Median HBV DNA, log10 copies/mL 10 Median <104 (n=12) Median >104 (n=11) 8 6 HBeAg seroconversion occurred only in this group 4 2 Baseline 8 16 24 32 40 48 56 64 72 Weeks Potential assessment of early virological response to predict outcome Gauthier et al 1999 21 Early Viral Suppression with Telbivudine Association with 2-year HBeAg seroconversion† Seroconversion at 2 years, % 50 HBeAg-positive patients 46 39 40 30 21 20 10 6 n=183 n=54 n=81 n=107 <QL QL–3 3–4 >4 0 Serum HBV DNA level at 24 weeks, log10 copies/mL †Preliminary data from locked database Han et al 2007 22 Early Viral Suppression with Entecavir Association with 1-year HBeAg seroconversion† Seroconversion at 48 weeks, % HBeAg-positive patients 50 40 30 30 24 20 12 13 10 47/159 8/34 14/117 2/15 <400 400–3 log 3–5 log >5 log 0 HBV DNA at 24 weeks, copies/mL BMS Entecavir AVDAC Briefing Document 2005 Profound, Early Viral Suppression Correlates with Lower Risk of Resistance Patients with lamivudine resistance , % 100 80 HBeAg-positive patients (n=159), median 30 months follow up 64 60 20 0 Patients with ADV resistance at week 192, % 100 80 HBeAg-negative patients (n=125) 60 40 32 8 1/12 <200 3/23 20 13/41 49 40 13 76/118 <3 log <4 log >4 log HBV DNA level at week 24, copies/mL 23 6 0 <3 log >3 log HBV DNA level at week 48, copies/mL Hadziyannis et al 2006; Yuen et al 2001 24 Early Viral Suppression with Telbivudine Association with resistance† Patients with telbivudine resistance week 92, % 100 80 HBeAg-negative patients 60 60 40 20 n=178 20 12 2 n=18 ≤300 300–3 log10 n=16 n=10 0 3 log10–4 log10 >5 log10 HBV DNA level at week 24, copies/mL †Preliminary analysis of patients with viral rebound at week 92 Di Bisceglie et al 2006 Early Viral Suppression Can Be a Signpost for Future Therapeutic Response HBeAg-positive Reduce serum HBV DNA Normal ALT PCR negative HBeAg loss Signpost Start Rx. Anti-HBeAg seroconversion HBsAg loss Goals of HBV therapy a) Prevent cirrhosis, liver failure and HCC b) Improve survival HBeAg-negative Reduce serum HBV DNA PCR negative Normal ALT Signpost Liver inflammation and fibrosis HBsAg loss 25 26 On-Treatment Roadmap Concept Potential Foundation for Building a CHB Therapeutic Roadmap On-treatnent early virological response monitoring Can help to identify suboptimal responders Provides opportunities to modify treatment to enhance antiviral efficacy Can help support individualised treatment maps Has the potential to improve long-term outcomes Response markers act as signposts for clinical management Additional interventions required Chosen therapy is effective and well tolerated 27 28 Proposed New Treatment Algorithm for CHB Recent expert panel and Roadmap publication ?? Unresolved questions What When What Which Is the best on-treatment marker? Is the best timing for decision points? Cut-off level for on-treatment decisions? Type of initial/add-on therapy? Expert panel convened to evaluate evidence and develop treatment recommendations Report of an International Workshop: Roadmap for Management of Patients Receiving Oral Therapy for Chronic Hepatitis B Keeffe EB et al. Clinical Gastroenterology and Hepatology 2007 Keeffe et al 2007 29 Roadmap Concept Management algorithm according to 12-week virologic response Start treatment Week 12: assessment for primary non-response ≥1 log 10 copies/mL decrease from baseline: primary response Continue <1log10 copies/mL decrease from baseline: primary failure Non-compliant Compliant Counsel Change Tx Keeffe et al 2007 30 Roadmap Concept On-treatment responses Start treatment Week 12: assessment for primary non-response Week 24: early predictors of efficacy Complete response PCR negative† †Defined as <300 copies/mL Partial response Inadequate response ≥60–<2000 IU/mL or ≥300–<10,000 copies/mL >2000 IU/mL or ≥10,000 copies/mL Keeffe et al 2007 31 Roadmap Concept Management algorithm for complete response at 24 weeks Week 24: early predictors of efficacy Complete response PCR negative† Continue Monitor 6-monthly †Defined as <300 copies/mL Definition of complete response: PCR negative (≤300 copies/mL) Interval for monitoring can be prolonged to every 6 months In patients with more advanced disease, monitoring every 3 months or more frequently Keeffe et al 2007 32 Roadmap Concept Management algorithm for partial response at 24 weeks Week 24: early predictors of efficacy Partial response ≥60–<2000 IU/mL or ≥300–<10,000 copies/mL Add another drug without crossresistance or continue Monitor 3-monthly Keeffe et al 2007 33 Roadmap Concept Management algorithm for inadequate response at 24 weeks Week 24: early predictors of efficacy Inadequate response ≥2000 IU/mL or ≥10,000 copies/mL Adapt regimen Complete response †Defined as <300 copies/mL Partial response Inadequate response Keeffe et al 2007 34 HBV Roadmap Proposal: Monitoring Monitor every 3 months If patient achieves complete response by 48 weeks, follow monitoring recommendation (6-monthly) If patient shows continuous decline up to 48 weeks, but still has higher viral load than a complete responder, continue to monitor every 3 months If patient shows an increase or ‘plateauing’ of viral level, they should be treated based on roadmap recommendation for inadequate or non-responder In patients with more advanced disease, more frequent monitoring may be indicated Keeffe et al 2007 35 Summary and Conclusions Importance of early monitoring of virologic response to therapy Early and sustained viral suppression has been associated with prevention of disease progression HBV DNA is a critical signpost in the on-treatment management of CHB On-treatment management offers opportunities to optimise treatment response – Essential to identify suboptimal responses – Modify management to enhance antiviral efficacy – Potential to improve long-term outcomes 36 How should the roadmap be applied to telbivudine? 37 Conclusion from Report of an International Workshop: Roadmap for Management of Patients Receiving Oral Therapy for Chronic Hepatitis B Early monitoring of the virologic response to therapy in chronic hepatitis B treated with oral nucleos(t)ides is essential… Use of this roadmap should permit improved individualized ontreatment management designed to enhance long-term patient outcomes 1.Keeffe EB, Zeuzem S, Koff RS, Dieterich DT, Esteban-Mur R, Gane E, Jacobson IM, Lim SG, Naoumov NN, Marcellin P, Piratvisuth T, Zoulim F. Clin Gastroenterol Hepatol. In press. 37 How May the HBV Treatment Roadmap be Applied to Telbivudine Treatment? 38 Start Telbivudine Assessment of Primary Response at week 12 Early Virologic Response Efficacy at Week 24 PCR Negative (<300 copies/mL) HBV DNA 300 copies/mL to 10,000 copies/mL HBV DNA > 10,000 copies/mL Maintain Telbivudine Adapted form: Keeffe EB, Zeuzem S, Koff RS, Dieterich DT, Esteban-Mur R, Gane E, Jacobson IM, Lim SG, Naoumov NN, Marcellin P, Piratvisuth T, Zoulim F. Clin Gastroenterol Hepatol. In press. 38 39 Viral Load Achieved by Week 24: Telbivudine vs. Lamivudine HBeAg Positive HBeAg Negative 100% 100% 36% 80% 18% 60% 17% 13% 40% 20% 14% 45%* % of patients PCR non-detectable % of patients PCR non-detectable 24% 5% 7% 9% 8% 11% 80% 9% 60% 40% 80%* 71% 20% 32% 0% 0% Telbivudine, n=450 Lamivudine, n=453 <QL QL-3 Log Telbivudine, n=222 3-4 Log Lamivudine, n=221 >4 Log * P < 0.05 Di Bisceglie A, et al. Presented at AASLD 2006 39 40 Telbivudine Is A Good Option for Therapy for HBeAg-Positive Patients Baseline ALT ≥ 2 x ULN N=558 49% of Telbivudine Treated Patients Achieve PCR Negativity (≤300 copies/mL) at Week 24 86% 49% 85% 2% PCR Negative Week 104 Seroconversion Week 104 ALT Normalization Week 104 Resistance Week 92 40 41 Telbivudine Is A Good Option for Therapy for HBeAg-Negative Patients All telbivudine-treated HBeAg-Negative Patients N=588 80% of Telbivudine Treated Patients Achieve PCR Negativity (≤300 copies/mL) at Week 24 88% PCR Negative Week 104 N=78/86 49% Seroconversion Week 104 2% Resistance at 92 weeks 41 How May the HBV Treatment Roadmap be Applied to Telbivudine Treatment? 42 Start Telbivudine Early Virologic Response Efficacy at Week 24 HBV DNA PCR Negative (<300 copies/mL) HBV DNA ≥300–<10,000 copies/mL HBV DNA > 10,000 copies/mL Maintain Telbivudine Week 52 - Monitor HBV DNA closely If PCR Negative Maintain Telbivudine Monotherapy If PCR Positive revise treatment strategy Adapted form: Keeffe EB, Zeuzem S, Koff RS, Dieterich DT, Esteban-Mur R, Gane E, Jacobson IM, Lim SG, Naoumov NN, Marcellin P, Piratvisuth T, Zoulim F. Clin Gastroenterol Hepatol. In press. 42 How May the HBV Treatment Roadmap be Applied to Telbivudine Treatment? 43 Start Telbivudine Assessment of Primary Response at week 12 Early Virologic Response Efficacy at Week 24 PCR Negative (<300 copies/mL) HBV DNA ≥300–<10,000 copies/mL HBV DNA > 10,000 copies/mL Revise treatment strategy Adapted form: Keeffe EB, Zeuzem S, Koff RS, Dieterich DT, Esteban-Mur R, Gane E, Jacobson IM, Lim SG, Naoumov NN, Marcellin P, Piratvisuth T, Zoulim F. Clin Gastroenterol Hepatol. In press. 43 44 44