Direct-Acting Antiviral Treatment for Hepatitis C Genotypes Uncommon in High-Income Countries: A Dutch Nationwide Cohort Study

Abstract Background The majority of hepatitis C virus (HCV) infections are found in low- and middle-income countries, which harbor many region-specific HCV subtypes. Nevertheless, direct-acting antiviral (DAA) trials have almost exclusively been conducted in high-income countries, where mainly epidemically spread HCV subtypes are present. Recently, several studies have demonstrated suboptimal DAA efficacy for certain nonepidemic subtypes, which could hamper global HCV elimination. Therefore, we aimed to evaluate DAA efficacy in patients treated for a nonepidemic HCV genotype infection in the N... Mehr ...

Verfasser: Isfordink, Cas J
van de Laar, Thijs J W
Rebers, Sjoerd P H
Wessels, Els
Molenkamp, Richard
Knoester, Marjolein
Baak, Bert C
van Nieuwkoop, Cees
van Hoek, Bart
Brakenhoff, Sylvia M
Blokzijl, Hans
Arends, Joop E
van der Valk, Marc
Schinkel, Janke
Willemse, Sophie
Erken, Robin
Bomers, Marije
Ramsoekh, Dewkoemar
Amsterdam, U M C
de Knegt, Rob
de Man, Rob
Rijnders, Bart
Erasmus, M C
van Soest, Hanneke
Haaglanden, M C
Koek, Ger
Posthouwer, Dirk
Koc, Ozgür
Maastricht, U M C
Burger, David
van Dijk, Marleen
Drenth, Joost
von den Hoff, Daan
Radboud, U M C
Brouwer, Johannes
de Graaf Gasthuis, Reinier
Boland, Greet
van Erpecum, Karel
Utrecht, U M C
Dokumenttyp: Artikel
Erscheinungsdatum: 2021
Reihe/Periodikum: Open Forum Infectious Diseases ; volume 8, issue 2 ; ISSN 2328-8957
Verlag/Hrsg.: Oxford University Press (OUP)
Schlagwörter: Infectious Diseases / Oncology
Sprache: Englisch
Permalink: https://search.fid-benelux.de/Record/base-26664203
Datenquelle: BASE; Originalkatalog
Powered By: BASE
Link(s) : http://dx.doi.org/10.1093/ofid/ofab006

Abstract Background The majority of hepatitis C virus (HCV) infections are found in low- and middle-income countries, which harbor many region-specific HCV subtypes. Nevertheless, direct-acting antiviral (DAA) trials have almost exclusively been conducted in high-income countries, where mainly epidemically spread HCV subtypes are present. Recently, several studies have demonstrated suboptimal DAA efficacy for certain nonepidemic subtypes, which could hamper global HCV elimination. Therefore, we aimed to evaluate DAA efficacy in patients treated for a nonepidemic HCV genotype infection in the Netherlands. Methods We performed a nationwide retrospective study including patients treated with interferon-free DAAs for an HCV genotype other than 1a/1b/2a/2b/3a/4a/4d. The genotype was determined by NS5B region phylogenetic analysis. The primary end point was SVR-12. If stored samples were available, NS5A and NS5B sequences were obtained for resistance-associated substitutions (RAS) evaluation. Results We included 160 patients, mainly infected with nonepidemic genotype 2 (41%) and 4 (31%) subtypes. Most patients were from Africa (45%) or South America (24%); 51 (32%) were cirrhotic. SVR-12 was achieved in 92% (140/152) of patients with available SVR-12 data. Only 73% (8/11) genotype 3–infected patients achieved SVR-12, the majority being genotype 3b patients with 63% (5/8) SVR. Regardless of SVR, all genotype 3b patients had 30K and 31M RAS. Conclusions The DAA efficacy we observed in most nonepidemic genotypes in the Netherlands seems reassuring. However, the low SVR-12 rate in subtype 3b infections is alarming, especially as it is common in several HCV-endemic countries. Alongside earlier results, our results indicate that a remaining challenge for global HCV elimination is confirming and monitoring DAA efficacy in nonepidemic genotypes.