Abstract
Background
Daclatasvir and asunaprevir combination therapy has shown a high virological response for chronic genotype 1 hepatitis C virus (HCV)-infected patients. However, the safety and efficacy of the therapy for older patients are unknown.
Methods
One hundred seventy patients younger than 75 years and 139 patients aged 75 years or older with genotype 1 HCV infection were treated for 24 weeks with daclatasvir plus asunaprevir. Pretreatment drug-resistance-associated variants at NS5A-L31 and NS5A-Y93 were determined by the Invader assay. Virological response and adverse events according to age were analyzed.
Results
The sustained virological response (SVR) rate for older patients was similar to that for younger patients (97.1 and 92.4 % respectively). In multivariate regression analysis, prior simeprevir treatment (odds ratio 56.6 for absence; P < 0.001) was identified as a significant independent predictor of SVR. The SVR rate for patients with pretreatment resistance-associated variants (RAVs) at a low population frequency (less than 25 %) was similar to that for patients with no detectable RAVs. The frequency of adverse events was similar between younger and older patients. All 19 very elderly patients (85 years or older) completed the 24 weeks of treatment and achieved SVR.
Conclusions
Older patients have a virological response and tolerance of daclatasvir plus asunaprevir therapy similar to those of younger patients. Even though RAVs were detected, virological response similar to that for patients with no detectable RAVs may still be expected for patients with RAVs as long as the population frequency is low.
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Abbreviations
- DAA:
-
Direct-acting antiviral
- HCV:
-
Hepatitis C virus
- PEG-IFN:
-
Pegylated interferon
- RAV:
-
Resistance-associated variant
- SVR:
-
Sustained virological response
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Acknowledgments
The authors thank Rie Akiyama for her excellent technical assistance and Nobuko Yokoyama, Akemi Sada, and Emi Nishio for clerical assistance.
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Kazuaki Chayama has received honoraria from MSD, Bristol-Myers Squibb, Gilead Sciences, and AbbVie and research funding from Dainippon Sumitomo Pharma, TORAY, Eisai, Otsuka Pharma, Mitsubishi Tanabe Pharma, Daiichi Sankyo, and Bristol-Myers Squibb. Michio Imamura has received honoraria and research funding from Bristol-Myers Squibb. Masataka Tsuge has received research funding from Bristol-Myers Squibb.
Funding statement
This research is partially supported by research funding from the Research Program on Hepatitis from the Japan Agency for Medical Research and Development (Grant Number 15fk0210001h0002). The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. No additional external funding was received for this study.
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Morio, R., Imamura, M., Kawakami, Y. et al. Safety and efficacy of dual therapy with daclatasvir and asunaprevir for older patients with chronic hepatitis C. J Gastroenterol 52, 504–511 (2017). https://doi.org/10.1007/s00535-016-1255-4
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DOI: https://doi.org/10.1007/s00535-016-1255-4