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Published on: June 9, 2022
A novel candidate hepatitis C virus genotype 4 subtype identified by next generation sequencing full-genome
Mariantonietta Di Stefano1, Mona H Ismail2,3, Thomas Leitner4
1Section of Infectious Diseases, Department of Clinical and Surgical Sciences, University of Foggia, Foggia, Italy.
Insights
Researchers discovered a new Hepatitis C virus (HCV) subtype within genotype 4. This finding enhances understanding of HCV diversity and has implications for diagnostics and treatment strategies.
Area of Science:
- Virology
- Genomics
- Public Health
Background:
- Hepatitis C virus (HCV) infection is a significant global health issue, leading to chronic liver diseases.
- HCV is categorized into 8 genotypes and 93 subtypes, with distinct geographical prevalence.
- Hepatitis C virus genotype 4 is prevalent in the Middle East and Eastern Mediterranean.
Purpose of the Study:
- To fully characterize the Hepatitis C virus genome using next-generation sequencing.
- To identify and classify novel subtypes within Hepatitis C virus genotype 4.
Main Methods:
- Whole-genome sequencing was employed to analyze the complete genome of the 141-HCV isolate.
- Phylogenetic reconstructions were performed on the entire genome of Hepatitis C virus genotype 4 strains.
Main Results:
- The 141-HCV isolate formed a distinct cluster within the Hepatitis C virus genotype 4 classification.
- Phylogenetic analysis provided new insights into the genetic variability of Hepatitis C virus.
Conclusions:
- A novel, unclassified subtype of Hepatitis C virus genotype 4 was identified.
- This discovery highlights the ongoing evolution and diversity of Hepatitis C virus.
- Understanding subtype variations is crucial for developing effective diagnostic and therapeutic strategies due to potential differences in drug sensitivity and resistance profiles.
Background And Aim:
Hepatitis C virus (HCV) infection is a major global public health concern, being a leading cause of chronic liver diseases such as chronic hepatitis, cirrhosis, and hepatocellular carcinoma. The virus is classified into 8 genotypes and 93 subtypes, each displaying distinct geographic distributions. Genotype 4 is the most predominant in the Middle East and Eastern Mediterranean and is associated with high rates of hepatitis C infection worldwide. This study used next-generation sequencing to fully characterize the HCV genome and identify a novel subtype within genotype 4 isolated from a 64-year-old Saudi man diagnosed with hepatitis C.
Methods:
We analyzed the complete genome of the 141-HCV isolate using whole-genome sequencing.
Results:
Our phylogenetic reconstructions, based on the entire genome of HCV-4 strains, revealed that the 141-HCV isolate formed a distinct group within the genotype 4 classification, providing valuable new insights into the variability of HCV.
Conclusion:
This discovery of a previously unclassified HCV subtype within genotype 4 sheds light on the ongoing evolution and diversity of the virus. Such knowledge has significant implications for diagnostic and therapeutic approaches, as different subtypes may exhibit varying drug sensitivities and resistance profiles.
