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Development of persistent HCV genotype 3a infection cell culture model in huh-7 cell
Sultan Asad1, Bushra Ijaz, Waqar Ahmad
1Applied and Functional Genomics Lab, Centre of Excellence in Molecular Biology, 87-West Canal Bank Road, 53700 Lahore, Pakistan.
Insights
Researchers developed a persistent Hepatitis C virus (HCV) genotype 3a cell culture model. This model consistently replicates HCV genotype 3a for over a month, aiding further research.
Area of Science:
- Virology
- Cell Biology
- Hepatitis C Research
Background:
- Hepatitis C virus (HCV) poses a global health challenge, with genotype 3a being most common in Pakistan.
- Limited small animal models and genomic replicons hinder understanding of HCV genotype 3a's life cycle, pathogenesis, and treatment.
- Development of a persistent HCV genotype 3a infectious cell culture model is crucial.
Purpose of the Study:
- To establish a reliable and persistent cell culture model for Hepatitis C virus (HCV) genotype 3a.
- To facilitate in-depth studies on HCV genotype 3a replication, pathogenesis, and therapeutic strategies.
Main Methods:
- Huh-7 cells were inoculated with HCV genotype 3a serum.
- Cells and supernatant were collected up to 40 days post-infection.
- Infectivity of the supernatant on naive Huh-7 cells was assessed.
Main Results:
- HCV replication confirmed via Real-Time RCR and Western blot (HCV core).
- Intracellular HCV RNA detected from day 1 to day 40; HCV core protein from day 2 to day 40.
- Supernatant demonstrated infectivity for naive cells; siRNA confirmed replication persistence.
Conclusions:
- A persistent cell culture model for HCV genotype 3a replication was successfully developed.
- The model consistently replicates HCV genotype 3a for over one month.
- This model provides a valuable tool for studying HCV genotype 3a.
Background:
Hepatitis C virus (HCV) is one of the major health concerns globally, with genotype 3a as the most prevalent in Pakistan. Lack of efficient HCV genotype 3a small animal models as well as genomic replicons has hampered the complete understanding of its life cycle, pathogenesis and therapeutic options. In this study we aimed to develop a persistent HCV genotype 3a infectious cell culture model.
Methods:
We inoculated Huh-7 cells with HCV genotype 3a serum. Cells and media supernatant were collected at different time periods up to 40th day post infection. Culture media supernatant was also collected to find out its ability to infect naive Huh-7 cells.
Results:
HCV replication was confirmed at both RNA and protein level through Real Time RCR and western blot using HCV core as marker. In order to validate the persistence of our model for HCV genotype 3a replication we inhibited the HCV replication through core specific siRNAs. The HCV RNA was detected intracellularly from the day one post infection up till 40th day, while HCV core protein was detected from the second day up to 40th day consistently. In culture media supernatant HCV RNA was also actively detected conferring its ability to infect the naive Huh-7 cells. Furthermore, core specific siRNA showed significant inhibition at 24th hour post transfection both at RNA and protein level with progressive increase in the expression of core gene after 3rd day. It clearly depicts that the Huh-7 successfully retained the HCV replication after degradation of siRNA.
Conclusion:
Finally, we report that our persistent infection cell culture model consistently replicate HCV genotype 3a for more than 1 month.
