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Updated: Aug 10, 2026
Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
Published on: July 16, 2012
[Genotyping of HCV isolates from different populations in Shanghai by using second generation line probe assay]
Insights
Hepatitis C virus (HCV) genotypes 1b and 1a were most prevalent in patients and intravenous drug users in Shanghai, respectively. This study identified seven HCV subtypes across four genotypes, with subtypes 2b, 3a, 3b, and 6a newly discovered in the region.
Area of Science:
- Virology
- Epidemiology
- Public Health
Context:
- Hepatitis C virus (HCV) infection remains a significant global health concern.
- Understanding HCV genotype distribution is crucial for effective treatment and prevention strategies.
- Limited data exists on HCV genotype prevalence in specific populations within Shanghai.
Purpose:
- To determine the distribution and frequency of HCV genotypes in patients with hepatitis C (PHCs), blood donors (BDs), and intravenous drug abusers (IVDAs) in Shanghai.
- To identify newly emerging HCV subtypes within these populations.
Summary:
- A study genotyped 109 HCV isolates from PHCs (n=81), BDs (n=7), and IVDAs (n=21) using RT-nested PCR and the INNO-LIPA HCV II assay.
- HCV genotype 1b was predominant in PHCs (87.6%) and BDs (71.4%).
- In IVDAs, genotype 1a (38.1%) and 1b (23.8%) were most common, with a higher diversity of subtypes including 1a, 2a/2c, 3a, 3b, and 6a, and newly identified subtypes 2b, 3a, 3b, and 6a.
Impact:
- This research provides critical epidemiological data on HCV genotypes in Shanghai, informing public health interventions.
- The identification of specific genotype prevalence in different risk groups aids in targeted screening and treatment efforts.
- Findings highlight the importance of monitoring HCV trends, particularly among high-risk populations like IVDAs.
Objective:
To investigate the distribution and frequency of various genotypes in different populations in Shanghai.
Methods:
109 HCV isolates by using RT-nested PCR including 81 from patients with hepatitis C (PHCs), 7 from blood donors (BDs) and 21 from intravenous drug abusers (IVDAs) were genotyped by using recently improved second generation line probe assay (INNO-LIPA HCV II innogenetics N.V.Belgium).
Results:
Among 81 HCV isolates from PHCs, there were 71 (87.6%) genotype 1b, 4(4.9%)2a, 2(2.5%)3b, 1(1.2%)6a, 2(2.5%) mixed genotypes (1 for 2a or 2c + 2b + 1, 1 for 1b + 6a) and 1 (1.2%) undeterminable respectively, and among 7 from BDs, there were 5 1b and 2 genotype 2a. But among 21 from IVDAs, there were 8(38.1%) genotype 1a, 5(23.8%)1b, 2(9.5%)2a or 2c, 2(9.5%)3a, 1(4.8%) 3b and 3(14.3%) mixed genotypes (1 for 1a + 2a or 2c, 1 for 1b + 2a or 2c + 6a and 1 for 1a + 1b + 3b) respectively.
Conclusion:
(1) 7 HCV subtypes (1a, 1b, 2a, 2b, 3a, 3b and 6a) belonging to 4 HCV genotypes (1, 2, 3, 6) were present in different populations in Shanghai. Of them, 2b, 3a, 3b and 6a were first found. (2) HCV genotype 1b was most commonly found in PHCs and BDs. 1a and 3a were only found in IVDAs. (3) The fact that more HCV subtypes were found in IVDAs in this city.
