Journals / Türk Mikrobiyoloji Cemiyeti Dergisi / 2019 / Cilt: 49 - Sayı: 1

Nucleos(t)ide Resistance Mutations in Chronic HBV Patients with Treatment Failure

Tedavi Başarısızlığı Olan Kronik HBV Hastalarında Nükleoz(t)id Direnç Mutasyonları

Pages
41–46
Publication Date
2022-11-05
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Especially in cases such as treatment failures suggestive of the presence of resistance, more extensive mutation analysis should be performed and treatment regimens should be continuously updated depending on the presence of these mutations.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Hepatitis B infection is not actually a curable disease, and the goal is only repression of viral replication and therefore often requires lifelong treatment.
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Key Findings & Data:Method: In this study; the results of HBV drug resistance of 120 patients with CHB who were followed-up in various clinics of Inonu University Medical Faculty between 2006-2018 were evaluated retrospectively.
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Conclusion & Impact:Especially in cases such as treatment failures suggestive of the presence of resistance, more extensive mutation analysis should be performed and treatment regimens should be continuously updated depending on the presence of these mutations.
🔬Design:Research Article
📍Scope:2006-2018 Verileri
⚙️Variables:Domain Parameters

Abstract

Objective: Hepatitis B infection is not actually a curable disease, and the goal is only repression of viral replication and therefore often requires lifelong treatment. Long-term antiviral therapy leads to the emergence of resistant mutant viruses. Mutations in the reverse transcriptase gene region, which is the main target region of the nuleos(t)ide analogues, is the biggest problem in the treatment. The aim of this study was to evaluate the nucleos(t)ide resistance mutations in patients with chronic hepatitis B (CHB) treatment failure. Method: In this study; the results of HBV drug resistance of 120 patients with CHB who were followed-up in various clinics of Inonu University Medical Faculty between 2006-2018 were evaluated retrospectively. In determining the drug resistance; commercial reverse hybridizationbased tests and pyrosequencing method were used. Results: Approximately 52% of single and 48% of multiple base mutations were detected in 120 patients included in the study. In addition to various primary mutations leading to adefovir resistance such as rtA181T/V and rtN236T, compensatory mutations such as rtL180M, rtL80V/I and rtV173L have also been found most of which are responsible for lamivudine/telbivudine resistance. rtM204V/I (34.16%) was the most common among single base mutations and rtM204V/I+rtL180M (18.33%) was the most common among multiple base mutations. Results: HBV resistance mutations should be monitored long-term and permanently. Especially in cases such as treatment failures suggestive of the presence of resistance, more extensive mutation analysis should be performed and treatment regimens should be continuously updated depending on the presence of these mutations.

Özet

Amaç: Hepatit B enfeksiyonu aslında tedavi edilebilir bir hastalık değildir ve amaç yalnızca viralreplikasyonun baskılanması olup, bu nedenle de çoğu kez yaşam boyu tedavi gerektirir. Uzun süreliantiviral tedavi beraberinde dirençli mutant virüslerin ortaya çıkışına neden olmaktadır. Nüleoz(t)idanaloglarının ana hedef bölgesi olan revers transkriptaz gen bölgesindeki mutasyonlar tedavidekien büyük sorundur. Bu çalışmada, kronik hepatit B tedavi başarısızlığı gösteren hastalardakinükleoz(t)id direnç mutasyonlarının restrospektif olarak değerlendirilmesi amaçlanmıştır.Yöntem: Bu çalışmada, 2006-2018 yılları arasında, İnönü Üniversitesi Tıp Fakültesi çeşitli kliniklerinde takip edilen ve tedavi başarısızlığı gösteren, toplam 120 kronik hepatit B hastasına ait HBVilaç direnci sonuçları retrospektif olarak değerlendirilmiştir. İlaç direncinin belirlenmesinde, ticariters hibridizasyon temelli testler ve pirosekanslama yöntemi kullanılmıştır.Bulgular: Çalışmaya dâhil edilen 120 hastanın yaklaşık %52’sinde tekli ve %48’inde çoklu bazmutasyonu belirlenmiştir. Çoğunluğu lamivudin/telbivudin direncinden sorumlu olmak üzere,rtA181T/V ve rtN236T gibi adefovir direncine neden olan çeşitli primer mutasyonların yanı sırartL180M, rtL80V/I ve rtV173L gibi kompensatuvar mutasyonlar da saptanmıştır. Tekli baz mutasyonlarından en sık rtM204V/I (%34.16) ve çoklu baz mutasyonları içerisinde ise en sık rtM204V/I+rtL180M (%18.33) görülmüştür.Sonuç: HBV direnç mutasyonlarının uzun süreli ve kalıcı olarak izlenmesi gerekmektedir. Özellikletedavi başarısızlığı gibi direnç düşünüldüğü durumlarda daha geniş çaplı mutasyon analizlerininyapılması ve tedavi rejimlerinin bu mutasyonların varlığına bağlı olarak sürekli güncellenmesigerekmektedir.

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Cite This Article

OTLU, B., BAYINDIR, Y., GÜRSOY, N. C., YAKUPOĞULLARI, Y., YENER, Ö., TEKEREKOĞLU, M. S., HARPUTLUOĞLU, M. (2022). Nucleos(t)ide Resistance Mutations in Chronic HBV Patients with Treatment Failure. Türk Mikrobiyoloji Cemiyeti Dergisi, Cilt: 49 - Sayı: 1, 41–46. https://ajindex.com/articles/635823

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