A comprehensive HBV array for the detection of HBV mutants and genotype

Area of Science:

• Virology
• Molecular Biology
• Genetics

Background:

• Hepatitis B virus (HBV) infection is a global health concern.
• Accurate detection of HBV genotypes and mutations is crucial for effective treatment and management.
• Existing methods may lack the capacity for simultaneous comprehensive analysis.

Purpose of the Study:

• To develop a novel HBV array for simultaneous detection of HBV genotypes and key gene mutations.
• To assess the performance of the developed array compared to existing methods.

Main Methods:

• Oligonucleotides for normal and mutant HBV sequences were spotted onto glass slides.
• HBV gene fragments from patient serum DNA were amplified using two-stage PCR.
• Allele-specific arrayed primer extension with fluorescent labeling was employed for detection.

Main Results:

• The array identified additional mutations in 44 out of 100 samples compared to a commercial kit, confirmed by sequencing.
• Analysis of 381 patient samples revealed enhanced sensitivity in detecting drug-resistant mutations earlier than clinical relapse.
• The assay demonstrated a low detection limit of 28 copies/mL.

Conclusions:

• The developed HBV array provides simultaneous genotype and mutation data in a single assay.
• This array offers superior performance compared to many existing methods for HBV analysis.
• The array has significant potential for improved clinical monitoring of HBV infection and antiviral therapy.