Efficacy of 8 weeks elbasvir/grazoprevir regimen for naïve-genotype 1b, HCV infected patients with or without glucose abnormalities: Results of the EGG18 study

2021 ◽  
Author(s):  
Vincenza Calvaruso ◽  
Salvatore Petta ◽  
Donatella Ferraro ◽  
Claudia La Mantia ◽  
Gerlando Gibilaro ◽  
...  
Keyword(s):  
Genotype 1B ◽  
Glucose Abnormalities

New Epidemiologic Data Regarding Hepatitis C Virus Infection in Romania

2017 ◽  
Vol 26 (4) ◽  
pp. 381-386
Author(s):  
Mircea Manuc ◽  
Carmen M. Preda ◽  
Corneliu P. Popescu ◽  
Cristian Baicuș ◽  
Theodor Voiosu ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Drug Users ◽  
Antiviral Agent ◽  
Virologic Response ◽  
Advanced Fibrosis ◽  
Direct Acting Antiviral ◽  
Genotype 1B ◽  
Direct Acting ◽  
End Stage

Background & Aims: Literature data suggest that HCV genotype-1b is present in 93-99% of the Romanian patients infected with hepatitis C virus (HCV). We present the genotyping tests recently performed on patients with HCV and advanced fibrosis eligible for the Direct-Acting Antiviral (DAA) therapy, as well as the prevalence of these cases across Romania.Methods: The genotyping method was performed on 7,421 HCV patients with advanced fibrosis. The detection method was automatic real time PCR platform M2000 (Abbott). Every subject was introduced into a database including age, sex, county and address.Results: Genotype 1b was almost exclusively present: 7,392/7,421 (99.6%). Genotype 1b patients were 19.6% from Bucharest, 49% were males, with a median age of 60 years. Genotype non-1b was encountered in 29/7,421 subjects (0.4%), 62% were males, 69% from Bucharest and the median age was 52 years. Most of the subjects (75%) were in the 6th and 7th age decade. The prevalence of these cases varied significantly across Romanian counties: the highest was in Bucharest (61.3/105), Bihor (47/105), Iasi (46/105) and Constanța (43/105), and the lowest in Ilfov (2.8/105), Harghita (3.7/105), Covasna (5.4/105) and Maramureș (8.8/105) (p<0.001).Conclusions: Genotype 1b is encountered in 99.6% of patients with chronic hepatitis C and advanced fibrosis from Romania. The presence of genotypes non-1b is more common in Bucharest, in males and at a younger age. There are significant differences regarding the distribution of these cases across Romania: the highest rates are in Bucharest, Bihor, Iasi and Constanta.Abbreviations: BMI: body mass index; DAA: direct-acting antiviral agent; GT: genotype; HBV: hepatitis B virus; HCC: hepatocellular carcinoma; HCV: hepatitis C virus; IDU: intravenous drug users; MELD: model for end stage liver disease; NASH: non-alcoholic steatohepatitis; SVR; sustained virologic response.

scholarly journals Genetic Determinants in a Critical Domain of NS5A Correlate with Hepatocellular Carcinoma in Cirrhotic Patients Infected with HCV Genotype 1b

Viruses ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 743
Author(s):  
Mohammad Alkhatib ◽  
Velia Di Maio ◽  
Valentina De Murtas ◽  
Ennio Polilli ◽  
Martina Milana ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Multivariable Analysis ◽  
Viral Fitness ◽  
Cellular Proteins ◽  
Genetic Determinants ◽  
Hcv Genotype ◽  
Genotype 1B ◽  
Oncogenic Pathways ◽  
Cirrhotic Patients ◽  
Cycle Regulation

HCV is an important cause of hepatocellular carcinoma (HCC). HCV NS5A domain-1 interacts with cellular proteins inducing pro-oncogenic pathways. Thus, we explore genetic variations in NS5A domain-1 and their association with HCC, by analyzing 188 NS5A sequences from HCV genotype-1b infected DAA-naïve cirrhotic patients: 34 with HCC and 154 without HCC. Specific NS5A mutations significantly correlate with HCC: S3T (8.8% vs. 1.3%, p = 0.01), T122M (8.8% vs. 0.0%, p < 0.001), M133I (20.6% vs. 3.9%, p < 0.001), and Q181E (11.8% vs. 0.6%, p < 0.001). By multivariable analysis, the presence of >1 of them independently correlates with HCC (OR (95%CI): 21.8 (5.7–82.3); p < 0.001). Focusing on HCC-group, the presence of these mutations correlates with higher viremia (median (IQR): 5.7 (5.4–6.2) log IU/mL vs. 5.3 (4.4–5.6) log IU/mL, p = 0.02) and lower ALT (35 (30–71) vs. 83 (48–108) U/L, p = 0.004), suggesting a role in enhancing viral fitness without affecting necroinflammation. Notably, these mutations reside in NS5A regions known to interact with cellular proteins crucial for cell-cycle regulation (p53, p85-PIK3, and β-catenin), and introduce additional phosphorylation sites, a phenomenon known to ameliorate NS5A interaction with cellular proteins. Overall, these results provide a focus for further investigations on molecular bases of HCV-mediated oncogenesis. The role of theseNS5A domain-1 mutations in triggering pro-oncogenic stimuli that can persist also despite achievement of sustained virological response deserves further investigation.

scholarly journals Resistance Analysis of the Hepatitis C Virus NS3 Protease Inhibitor Asunaprevir

2012 ◽  
Vol 56 (7) ◽  
pp. 3670-3681 ◽  
Author(s):  
Fiona McPhee ◽  
Jacques Friborg ◽  
Steven Levine ◽  
Chaoqun Chen ◽  
Paul Falk ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Protease Inhibitor ◽  
Clinical Studies ◽  
Replication Capacity ◽  
Replication Complex ◽  
Hcv Genotype ◽  
Genotype 1A ◽  
Genotype 1B ◽  
Ns3 Protease

ABSTRACTAsunaprevir (BMS-650032) is a potent hepatitis C virus (HCV) NS3 protease inhibitor demonstrating efficacy in alfa interferon-sparing, direct-acting antiviral dual-combination regimens (together with the NS5A replication complex inhibitor daclatasvir) in patients chronically infected with HCV genotype 1b. Here, we describe a comprehensivein vitrogenotypic and phenotypic analysis of asunaprevir-associated resistance against genotypes 1a and 1b using HCV replicons and patient samples obtained from clinical studies of short-term asunaprevir monotherapy. During genotype 1a resistance selection using HCV replicons, the primary NS3 protease substitutions identified were R155K, D168G, and I170T, which conferred low- to moderate-level asunaprevir resistance (5- to 21-fold) in transient-transfection susceptibility assays. For genotype 1b, a higher level of asunaprevir-associated resistance was observed at the same selection pressures, ranging from 170- to 400-fold relative to the wild-type control. The primary NS3 protease substitutions identified occurred predominantly at amino acid residue D168 (D168A/G/H/V/Y) and were associated with high-level asunaprevir resistance (16- to 280-fold) and impaired replication capacity. In asunaprevir single-ascending-dose and 3-day multiple-ascending-dose studies in HCV genotype 1a- or 1b-infected patients, the predominant pre-existing NS3 baseline polymorphism was NS3-Q80K. This substitution impacted initial virologic response rates in a single-ascending-dose study, but its effects after multiple doses were more ambiguous. Interestingly, for patient NS3 protease sequences containing Q80 and those containing K80, susceptibilities to asunaprevir were comparable when tested in an enzyme assay. No resistance-associated variants emerged in these clinical studies that significantly impacted susceptibility to asunaprevir. Importantly, asunaprevir-resistant replicons remained susceptible to an NS5A replication complex inhibitor, consistent with a role for asunaprevir in combination therapies.

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