We report a case of successful treatment of chronic hepatitis C infection with telaprevir-based triple therapy in a patient with hemophilia A complicated by factor Ⅷ inhibitor. A twenty-two years old male with heredi...We report a case of successful treatment of chronic hepatitis C infection with telaprevir-based triple therapy in a patient with hemophilia A complicated by factor Ⅷ inhibitor. A twenty-two years old male with hereditary hemophilia A and high-titer factor Ⅷ inhibitor was taking maintenance doses of recombinant factor Ⅷ. He visited our clinic for treatment of his chronic hepatitis C with the newly instituted protease inhibitor based therapy. He was diagnosed with hepatitis C genotype 1a at one year of age. He was initiated on telaprevir, ribavirin and peg-interferon for treatment of hepatitis C and qualified for response-guided therapy. He completed treatment at 24 wk with minimal adverse effects. Notably, after 4 wk of hepatitis C treatment, his factor Ⅷ inhibitor screen was negative and the dose for recombinant factor Ⅷ decreased by half of the initial dosing before he was treated for hepatitis C. We suspect that suppressing hepatitis C may help decrease factor Ⅷ inhibitor level and the need for recombinant factor Ⅷ.展开更多
目的初步研究具有自主知识产权的重组表达人凝血因子(rFⅧ)在研品种的临床前药代动力学。方法建立并优化生色底物活性检测方法,用于测定血浆样品中FⅧ活性浓度(FⅧ∶C);选择市售进口的同类药物Xyntha为参比药物,对只敲除了FⅧ基因的...目的初步研究具有自主知识产权的重组表达人凝血因子(rFⅧ)在研品种的临床前药代动力学。方法建立并优化生色底物活性检测方法,用于测定血浆样品中FⅧ活性浓度(FⅧ∶C);选择市售进口的同类药物Xyntha为参比药物,对只敲除了FⅧ基因的模型小鼠(HA小鼠)分组(n=18)单次尾静脉注射280 IU·kg-1受试药rhFⅧ或参比药Xyntha,在0、0.083、1、3、6、9、24、36和48 h采集血浆样品(30μL/只,每个时间点6个样品),测定其FⅧ∶C并计算药代动力学参数。结果受试rhFⅧ组和参比药Xyntha组给药后,0.083、1、3、6、9、24、36和48 h的血浆FⅧ∶C(IU·mL-1)分别为3.218±1.511 vs 3.616±1.504、2.089±0.593 vs 2.786±1.157、1.953±0.546 vs1.942±0.807、0.613±0.360 vs 1.025±0.321、0.515±0.370 vs 0.894±0.297、0.187±0.082 vs 0.310±0.108、0.061±0.038 vs 0.115±0.040、0.043±0.042 vs 0.023±0.012(P>0.05);主要药代动力学参数:t1/2(h)分别为8.83 vs9.15,AUC0-t(h·IU·mL-1)分别为19.67 vs 27.70,Vd(mL·kg-1)分别为176.37 vs 132.00,CL(mL·h-1·kg-1)分别为13.85 vs 10.00,MRT0-t(h)分别为8.64 vs 9.62。结论受试rhFⅧ单次HA小鼠尾静脉给药280 IU·kg-1后在小鼠体内的药代动力学过程与市售同类进口药物Xyntha基本一致。展开更多
文摘We report a case of successful treatment of chronic hepatitis C infection with telaprevir-based triple therapy in a patient with hemophilia A complicated by factor Ⅷ inhibitor. A twenty-two years old male with hereditary hemophilia A and high-titer factor Ⅷ inhibitor was taking maintenance doses of recombinant factor Ⅷ. He visited our clinic for treatment of his chronic hepatitis C with the newly instituted protease inhibitor based therapy. He was diagnosed with hepatitis C genotype 1a at one year of age. He was initiated on telaprevir, ribavirin and peg-interferon for treatment of hepatitis C and qualified for response-guided therapy. He completed treatment at 24 wk with minimal adverse effects. Notably, after 4 wk of hepatitis C treatment, his factor Ⅷ inhibitor screen was negative and the dose for recombinant factor Ⅷ decreased by half of the initial dosing before he was treated for hepatitis C. We suspect that suppressing hepatitis C may help decrease factor Ⅷ inhibitor level and the need for recombinant factor Ⅷ.
文摘目的初步研究具有自主知识产权的重组表达人凝血因子(rFⅧ)在研品种的临床前药代动力学。方法建立并优化生色底物活性检测方法,用于测定血浆样品中FⅧ活性浓度(FⅧ∶C);选择市售进口的同类药物Xyntha为参比药物,对只敲除了FⅧ基因的模型小鼠(HA小鼠)分组(n=18)单次尾静脉注射280 IU·kg-1受试药rhFⅧ或参比药Xyntha,在0、0.083、1、3、6、9、24、36和48 h采集血浆样品(30μL/只,每个时间点6个样品),测定其FⅧ∶C并计算药代动力学参数。结果受试rhFⅧ组和参比药Xyntha组给药后,0.083、1、3、6、9、24、36和48 h的血浆FⅧ∶C(IU·mL-1)分别为3.218±1.511 vs 3.616±1.504、2.089±0.593 vs 2.786±1.157、1.953±0.546 vs1.942±0.807、0.613±0.360 vs 1.025±0.321、0.515±0.370 vs 0.894±0.297、0.187±0.082 vs 0.310±0.108、0.061±0.038 vs 0.115±0.040、0.043±0.042 vs 0.023±0.012(P>0.05);主要药代动力学参数:t1/2(h)分别为8.83 vs9.15,AUC0-t(h·IU·mL-1)分别为19.67 vs 27.70,Vd(mL·kg-1)分别为176.37 vs 132.00,CL(mL·h-1·kg-1)分别为13.85 vs 10.00,MRT0-t(h)分别为8.64 vs 9.62。结论受试rhFⅧ单次HA小鼠尾静脉给药280 IU·kg-1后在小鼠体内的药代动力学过程与市售同类进口药物Xyntha基本一致。