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Genetic Subtypes and Natural Resistance Mutations in HCV Genotype 4 Infected Saudi Arabian Patients
Viruses ( IF 5.818 ) Pub Date : 2021-09-14 , DOI: 10.3390/v13091832
Mariantonietta Di Stefano 1 , Mona H Ismail 2, 3 , Thomas Leitner 4 , Giuseppina Faleo 1 , Saada A Elmnan Adem 3 , Mohamed O M E Elamin 2, 5 , Obeidi Eltreifi 2, 6 , Marwan J Alwazzeh 2, 7 , Jose R Fiore 1 , Teresa A Santantonio 1
Affiliation  

This study aimed to characterize the HCV genetic subtypes variability and the presence of natural occurring resistance-associated substitutions (RASs) in Saudi Arabia patients. A total of 17 GT patients were analyzed. Sequence analysis of NS3, NS5A, and NS5B regions was performed by direct sequencing, and phylogenetic analyses were used to determine genetic subtypes, RAS, and polymorphisms. Nine patients were infected by GT 4a, two with GT 4o and three with GT 4d. Two patients were infected with apparent recombinant virus (4a/4o/4a in NS3/NS5A/NS5B), and one patient was infected with a previously unknown, unclassifiable, virus of GT 4. Natural RASs were found in six patients (35%), including three infected by GT 4a, two by GT 4a/GT 4o/GT 4a, and one patient infected by an unknown, unclassifiable, virus of GT 4. In particular, NS3-RAS V170I was demonstrated in three patients, while NS5A-RASs (L28M, L30R, L28M + M31L) were detected in the remaining three patients. All patients were treated with sofosbuvir plus daclatasvir; three patients were lost to follow-up, whereas 14 patients completed the treatment. A sustained virological response (SVR) was obtained in all but one patient carrying NS3-RAS V170I who later relapsed. GT 4a is the most common subtype in this small cohort of Saudi Arabia patients infected with hepatitis C infection. Natural RASs were observed in about one-third of patients, but only one of them showed a treatment failure.

中文翻译:

沙特阿拉伯 HCV 基因 4 型感染患者的遗传亚型和自然耐药突变

本研究旨在表征沙特阿拉伯患者的 HCV 遗传亚型变异性和自然发生的耐药相关替代 (RAS) 的存在。共分析了 17 名 GT 患者。NS3、NS5A 和 NS5B 区域的序列分析通过直接测序进行,系统发育分析用于确定遗传亚型、RAS 和多态性。9 名患者被 GT 4a 感染,2 名患者被 GT 4o 感染,3 名患者被 GT 4d 感染。两名患者感染了明显的重组病毒(NS3/NS5A/NS5B 中的 4a/4o/4a),一名患者感染了以前未知的、无法分类的 GT 4 病毒。在 6 名患者(35%)中发现了天然 RAS ,包括感染 GT 4a 的 3 人,感染 GT 4a/GT 4o/GT 4a 的 2 人,以及感染未知、无法分类的 GT 4 病毒的 1 名患者。特别是,NS3-RAS V170I 在三名患者中得到证实,而在其余三名患者中检测到 NS5A-RAS(L28M、L30R、L28M + M31L)。所有患者均接受索非布韦加达卡他韦治疗;3名患者失访,14名患者完成治疗。除了一名后来复发的携带 NS3-RAS V170I 的患者外,所有患者都获得了持续的病毒学应答 (SVR)。GT 4a 是这一小群感染丙型肝炎感染的沙特阿拉伯患者中最常见的亚型。在大约三分之一的患者中观察到天然 RAS,但其中只有一名显示治疗失败。而14名患者完成了治疗。除了一名后来复发的携带 NS3-RAS V170I 的患者外,所有患者都获得了持续的病毒学应答 (SVR)。GT 4a 是这一小群感染丙型肝炎感染的沙特阿拉伯患者中最常见的亚型。在大约三分之一的患者中观察到天然 RAS,但其中只有一名显示治疗失败。而14名患者完成了治疗。除了一名后来复发的携带 NS3-RAS V170I 的患者外,所有患者都获得了持续的病毒学应答 (SVR)。GT 4a 是这一小群感染丙型肝炎感染的沙特阿拉伯患者中最常见的亚型。在大约三分之一的患者中观察到天然 RAS,但其中只有一名显示治疗失败。
更新日期:2021-09-14
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