[Establishing a new genotyping method of hepatitis B virus by polymerase chain reaction- restriction fragment length polymorphism (PCR-RFLP) to analysis on S region and its application].
OBJECTIVE
To establish a new polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method of genotyping HBV using Mbo I, BsTN I, BsmA I, Hpa II and investigate the relationship between genotype and clinical spectrum of hepatitis B.


METHODS
124 full-genomic HBV sequences and 13 S-genomic sequences were analyzed, genotype specific regions were identified by the restriction enzymes Mbo I, BsTN I, BsmA I, Hpa II. And 176 samples from different kinds of hepatitis B were genotyped by this method. Five samples had been randomly selected and directly sequenced their S gene, to assess the accuracy.


RESULTS
In 176 serum samples of patients with hepatitis B from Guizhou area, genotype B and C were found in 56.8% and 43.2% respectively. The proportions of genotype B and C in ASC were 40.0% and 15.7% (chi-square = 12.16, P < 0.005); and they were 31.6% and 14.0% in CHB (chi-square = 7.88, P < 0.005).


CONCLUSIONS
Genotyping HBV, based on S gene RFLP seems to be highly sensitive, differential and accurate and could be used in large-scale surveys. HBV genotype B and C are existed in Guizhou area.
Peng
Liang
L
Department of Infectious Diseases, Guiyang Medical College, Guiyang 550004, China.
Ding
Jing-Juan
JJ
Zhang
Li-Sha
LS
D005838:Genotype; D006509:Hepatitis B / Q000821:virology; D006515:Hepatitis B virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D014759:Viral Envelope Proteins / Q000235:genetics*
C118669:S envelope protein, hepatitis B virus; D014759:Viral Envelope Proteins