Techniques and clinical significance of determination of drug resistance of hepatitis B virus
- VernacularTitle:乙型肝炎病毒耐药的检测方法与临床意义
- Author:
Dongping XU
- Publication Type:Journal Article
- Keywords:
hepatitis B virus;
mutation;
drug resistance,viral;
antiviral agents
- From:
Medical Journal of Chinese People's Liberation Army
1981;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Nucleoside analogs (NA) are currently the major anti-hepatitis B virus (HBV) agents in clinic. However,long-term use of NA may initiate a state of drug resistance due to HBV mutation. The genotyping and phenotyping are two basic methods for analysis of HBV drug resistance. Genotyping is done mainly by DNA sequencing and reverse hybridization line probe to detect the well-known drug-resistant mutations. Phenotyping is an essential tool used to identify "novel" and complex resistant mutations,and it is based on the comparison of HBV replication capacities of variants and wild-type counterparts by cell-transfer of individual viral genomes followed by quantitation of HBV replication intermediates in the presence of antivirals in different concentrations. Clinical choice of HBV resistance detection assays relies on their sensitivity,specificity and cost-effectiveness. In our recent studies,some novel HBV resistant features have been found,including multidrug-resistant strain with mutations due to the use of both entecavir and adefovir,association of HBV genotype/subgenotype with the resistant mutational patterns,transmission of the resistant HBV to cause acute hepatitis,replication compensation of rt229 variants,etc. These findings are important for better understanding the clinical features of HBV drug-resistant mutations and strengthening the management of HBV drug resistance in clinic.
