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CHRONIC HBV PATIENTS WHO SWITCHED TO TENOFOVIR ALAFENAMIDE (TAF) AFTER EITHER 2 OR 3 YEARS OF PRIOR TENOFOVIR DISOPROXIL FUMARATE (TDF) TREATMENT DEMONSTRATED IMPROVEMENT IN BONE AND RENAL SAFETY
Maria Buti, Namiki Izumi, Young-Suk Lim, Harry L. Janssen, Jia-Horng Kao, AdrianStreinu-Cercel, Elena Nurmukhametova, Xiaoli Ma, Omer Tabak, Maciej Jablkowski,Vithika Suri, John F. Flaherty, Audrey H. Lau, Anuj Gaggar, Shuyuan Mo, Abhijit Choudhury, Scott Fung, Wan-Long Chuang, Edward GaneBackground and Aims:TAF, a novel prodrug of tenofovir, has shown similar efficacy toTDF in Phase 3 studies with less bone and renal effects. As part of a protocol amendment to extend double blind (DB) treatment for 1 additional year (Week 96 to Week 144), only~50% consented in time for this change; the remainder had already been receiving open-label (OL) TAF after Week 96. Here, we evaluate the 4 year (Week 192) safety and efficacy of switching to OL TAF in patients who had received DB TDF treatment for either 2 or 3years.Method:In 2 identically-designed studies, 1298 HBeAg-negative and HBeAg-positive CHB patients (873 TAF, 425 TDF) were randomized and treated with either TAF or TDF.In the TDF group, 180 patients were switched to OL TAF at Week 96 (OL TAF 96 Wk),while 202 patients switched from DB TDF to OL TAF at Week 144 (OL TAF 48 Wk). Safety assessments including changes in bone (hip and spine BMD) and renal (CrCl by Cockcroft-Gault [eGFRCG]) parameters, viral suppression, and biochemical responses were assessed at week 192 using the time of rollover to TAF as the respective OL baseline (BL). Withingroup changes in bone and renal parameters were assessed by paired t test or Wilcoxonsigned rank test. Results: Patient characteristics were similar for those receiving OL TAF for 1 or 2 years following DB TDF treatment. Significant increases in eGFRCGfrom OL BL were observed within each group at Week 192 (Table). Significant increases in hip and spine BMD from OL BL occurred within each group, the magnitude was greater after 2 years of OL TAF only for hip BMD. Within each group, virologic suppression (HBV DNA<29IU/mL) was maintained from OL BL to Week 192 in patients who remained on TAF treatment(OL TAF 96 Wk group: 88% and 88%; OL TAF 48 Wk group: 94% and 93%, respectively),while at Week 192, within each group the rate of ALT normalization by 2018 AASLD criteria increased from OL BL after switching to TAF (55% OL TAF 96 Wk and 37% OL TAF 48Wk).Conclusion:In CHB patients treated with TDF for 2 or 3 years, recovery of renal and bone parameters occurred at Year 4 suggesting reversibility of these parameters. Virologiccontrol was maintained and ALT normalization increased following the switch from TDF to TAF.作者: StephenW 时间: 2019-5-20 16:43
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改善TENOFOVIR DISOPROXIL FUMARATE(TDF)治疗2或3年后慢性HBV患者的骨和肾安全性改为TENOFOVIR ALAFENAMIDE(TAF)
Maria Buti,Namiki Izumi,Young-Suk Lim,Harry L. Janssen,Jia-Horng Kao,AdrianStreinu-Cercel,Elena Nurmukhametova,Xiaoli Ma,Omer Tabak,Maciej Jablkowski,Vithika Suri,John F. Flaherty,Audrey H. Lau, Anuj Gaggar,Shuyuan Mo,Abhijit Chowdhury,Scott Fung,Wan-Long Chuang,Edward GaneBackground和Aims:TAF是替诺福韦的一种新型前药,在3期研究中显示出与TDF相似的疗效,具有较少的骨和肾效应。作为协议修订的一部分,双盲(DB)治疗延长了1年(第96周至第144周),只有约50%同意时间的变化;其余的人在96周(OL)TAF后接受了开放标签。在这里,我们评估了接受DB TDF 2或3年的患者转换为OL TAF 4年(第192周)的安全性和有效性。方法:在相同设计的2项研究中,1298名HBeAg阴性和HBeAg阳性CHB患者(873名TAF,425名TDF)随机分组并接受TAF或TDF治疗。在TDF组中,180名患者在第96周转为OL TAF(OL TAF 96 Wk),而202名患者在第144周从DB TDF转为OL TAF(OL TAF 48 Wk)。安全性评估包括骨(髋骨和脊柱骨)密度)和肾脏的变化(Crcr by Cockcroft-Gault [eGFRCG]),,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, DBF治疗后1年或2年TAF,患者特征相似。在第192周,在每组中观察到来自OL BL的eGFRCG显着增加(表)。 OL BL的髋部和脊柱骨密度在每组中均显着增加,仅在髋部BMD的2年OL TAF后。在每组中,对于仍然接受TAF的患者,在TAF 96 Wk组中从OL BL维持病毒学抑制(HBV DNA <29IU / mL)至192周:88%和88%; OL TAF 48 Wk组:分别为94%和93%),在第192周,在每组中,2018年AASLD标准的ALT标准化率从OL BL变为TAF后增加(55%OL TAF 96 Wk和37 %OLTAF 48Wk)结论:接受TDF治疗2年或3年的CHB患者的肾脏和骨骼参数在4年时恢复,表明这些参数是可逆的。随着从TDF切换到TAF,维持病毒学控制和ALT正常化。作者: V友 时间: 2019-5-21 10:35