- 现金
- 62111 元
- 精华
- 26
- 帖子
- 30437
- 注册时间
- 2009-10-5
- 最后登录
- 2022-12-28
|
本帖最后由 StephenW 于 2012-5-22 02:00 编辑
Efficacy of 5 Years of Tenofovir Disoproxil Fumarate (TDF) in Chronic Hepatitis B Patients With High Viral Load (HBV DNA >=9 Log10 Copies/Ml) Sa1046 |
Stuart C. Gordon1, Patrick Marcellin2, Zahary Krastev3, Andrzej Horban4, Jörg Petersen5, Jan Sperl6, Phillip Dinh7, Eduardo B. Martins7, Leland J. Yee7, John F. Flaherty7, Kathryn M. Kitrinos7, Nika Berger7, Vinod K. Rustgi8, E. Jenny Heathcote9 Affiliation
1Henry Ford Medical Center, Detroit, MI; 2Hopital Beaujon, University of Paris, Clichy, France; 3University Hospital, St. Ivan Rilsky, Sofia, Bulgaria; 4Warsaw Medical University, Warsaw, Poland; 5Liver Unit Asklepios Klinik St. Georg, Hamburg, Germany; 6Institute for Clinical and Experimental Medicine, Prague, Czech Republic; 7Gilead Sciences, Inc., Foster City, CA; 8Metropolitan Research, Fairfax, VA; 9University of Toronto, Toronto, ON, Canada
Abstract:
Background: TDF is a potent antiviral with activity against hepatitis B virus. Year 4 data demonstrated 97-99% of HBeAg+ and HBeAg− patients on treatment at week(W)192 achieved HBV DNA <400 copies (c)/mL (69 IU/mL). Whether patients with extremely high baseline levels of viremia respond less well than those with lower viral levels remains unclear.
Goal: To evaluate the antiviral response over 5 years in both HBeAg− and HBeAg+ patients with markedly high baseline viral load, as defined by HBV DNA ≥9 log10 c/mL (8.24 log10 IU/mL).
Methods: 129 chronic hepatitis B (CHB) patients (11 HBeAg− and 118 HBeAg+) with high viral load were enrolled across the pivotal studies GS-US-174-0102 and GS-US-174-0103 and were randomized to TDF 300 mg (n=82) or adefovir dipivoxil (ADV) 10 mg (n=47). After W48, eligible patients (with a W48 liver biopsy) initiated open-label TDF for 7 additional years. On or after W72, patients with a confirmed HBV DNA ≥400 c/mL had the option to add emtricitabine (FTC) at the discretion of the investigator.
Results: Overall, approximately 20% (129/641) of patients enrolled in studies 102 and 103 had an HBV viral load ≥9 log10 c/mL. Baseline disease and demographic characteristics were: median age 32 years, 74% male, 67% Caucasian, 22% Asian, median baseline HBV DNA 9.52 log10 c/mL (9.01-10.92), and median ALT 111 U/L (30-670). Ninety-six percent of patients on treatment at W240 achieved HBV DNA <400 c/mL (66% by intent-to-treat analysis). Twenty-nine patients (out of 36 who were eligible) opted to add FTC between W72 and W240: 15 successfully achieved HBV DNA <400 c/mL at W240, 2 had HBV DNA ≥400 c/mL at W240, and 12 did not complete W240 (4 of whom had HBV DNA <400 c/mL at the last time point). Additionally, of the 7 patients who were eligible but did not add FTC, 6 achieved HBV DNA <400 c/mL by W240. For patients on study at W240, median (range) HBV DNA was 2.23 log10 c/mL (2.23, 3.82) and median decline from baseline was 7.26 log10 c/mL. Median (range) ALT was 30 U/L (13, 329) and 70% of patients normalized ALT. At W240, 38% of HBeAg+ patients achieved HBeAg loss with 30% seroconversion to anti-HBe. Cumulatively, 17 (15.2%) HBeAg+ patients lost HBsAg (Kaplan-Meier estimate). There were no patients with persistent viremia in the entire cohort. Resistance analyses showed no amino acid substitutions that could be associated with TDF resistance in patients with detectable HBV DNA at W240, discontinuation, or when FTC was added.
Conclusion: TDF is highly efficacious in patients with high baseline HBV viral load ≥9 log10 c/mL. Greater than 95% of patients achieved HBV DNA <400 c/mL, high rates of HBeAg and HBsAg loss were achieved, and no TDF resistance was observed.
Disclosure(s):
Stuart C. Gordon - Advisory Committees or Review Panels: Merck & Co, Gilead Sciences Inc; Consulting: Achillion Pharmaceutical, CVS-Caremark; Speaking and Teaching: Merck & Co, Gilead Sciences Inc, Vertex Pharmaceuticals
Patrick Marcellin - Consulting: Roche Pharma AG, MSD, Gilead Sciences Inc, BMS, Vertex Pharmaceuticals , Novartis Pharmaceuticals, Pharmasset, Inc., Janssen-Cilag, Boehringer Ingelheim GmbH, Abbott Laboratories, Pfizer Inc ; Grant/Research Support: Roche Pharma AG, MSD, Gilead Sciences Inc, Janssen-Cilag, Echosens; Speaking and Teaching: Roche Pharma AG, MSD, Gilead Sciences Inc, BMS, Vertex Pharmaceuticals , Novartis Pharmaceuticals, Pharmasset, Inc., Janssen-Cilag, Abbott Laboratories
Zahary Krastev - Grant/Research Support: biolex therapeutics inc, Gilead Sciences Inc
Jörg Petersen - Advisory Committees or Review Panels: Roche Pharma AG, MSD, Gilead Sciences Inc, Novartis Pharmaceuticals, Bristol-Myers Squibb Co. , Janssen-Cilag, Merck & Co; Grant/Research Support: GlaxoSmithKline ; Speaking and Teaching: Abbott Laboratories
Jan Sperl - Speaking and Teaching: Roche, Schering-Plough
Phillip Dinh - Employment: Gilead Sciences Inc
Eduardo B. Martins - Employment: Gilead Sciences Inc
Leland J. Yee - Employment: Gilead Sciences Inc
John F. Flaherty - Employment: Gilead Sciences Inc; Stock Shareholder: Gilead Sciences Inc
Kathryn M. Kitrinos - Employment: Gilead Sciences Inc, Gilead Sciences Inc, Gilead Sciences Inc, Gilead Sciences Inc
Nika Berger - Employment: Gilead Sciences Inc , Gilead Sciences Inc
Vinod K. Rustgi - Consulting: Vertex, Merck; Grant/Research Support: Anadys , Genentech, Schering-Plough Corp., Bristol-Myers Squibb Co. , Abbott Labs, Boehringer-Ingelheim; Speaking and Teaching: OnyxPharmaceuticals , Roche
E. Jenny Heathcote - Advisory Committees or Review Panels: Gilead Sciences Inc, Hoffman-LaRoche; Consulting: Gilead Sciences Inc, Hoffman-LaRoche, Merck & Co, Tibotec; Grant/Research Support: Axcan Pharma Inc., Boehringer Ingelheim GmbH, Bristol-Myers Squibb Co. , Gilead Sciences Inc, Hoffman-LaRoche, Merck & Co, Tibotec, Vertex Pharmaceuticals ; Speaking and Teaching: Gilead Sciences Inc, Hoffman-LaRoche, Merck & Co
The following people have nothing to disclose: Andrzej Horban
|
|