Deng Haijun, Huang Yong, Long Quanxin, et al. S gene variations of hepatitis B virus in children with vaccination failure[J]. Journal of Chongqing Medical University, 2016,41(1):76-80.
Deng Haijun, Huang Yong, Long Quanxin, et al. S gene variations of hepatitis B virus in children with vaccination failure[J]. Journal of Chongqing Medical University, 2016,41(1):76-80. DOI: 10.13406/j.cnki.cyxb.000803.
Objective:To determine variations of ‘major hydrophilic region’(MHR)and ‘a determinant region’in S gene of hepatitis B virus(HBV)in children with vaccine immunized failure. Methods:Serum samples from HBV vaccine immunized failure child and non-immunized child were collected;HBV S gene was amplified
sequenced
and compared with the consensus sequence of different genotype HBV genomes. Results:Nucleotide mutation ratio of ‘a determinant region’in HBV patients with vaccine immunized failure was obviously higher than that of vaccine navie patients(31.7% vs. 10.0%
P=0.044). Vaccine immunized failure patients with mutation in MHR or a determinant had a obviously lower viral DNA loading compared with that of mutation free patients(MHR:log106.9±1.8 vs. log107.7±1.8
P=0.000;a determinant:log107.1±1.6 vs. log107.6±1.9
P=0.000). In addition
vaccine immunized failure patients with MHR mutation also had higher ALT value(67.1±58.8 vs. 56.5±51.8
P=0.018). Totally 145 amino acid variation types were detected in vaccine immunized failure patients
including several ‘hot mutations’ :I110L(6)
K122R(15)
T126A(18)
I126T(14)
M133L(7)
G145R(6)and Y161F(12).Patients with G145 R and Y161 F had obviously lower serum viral loading(log106.8±1.1 vs. log107.5±1.8
P=0.048;log105.0±2.6 vs. log107.3±1.8
P=0.000
respectively). Conclusion:In general
vaccine immunized failure children have a higher mutation rate in MHR region and a determinant region
which correlate with lower viral loading and higher ALT value.
关键词
乙型肝炎病毒疫苗保护失败儿童病例病毒变异
Keywords
hepatitis B virusvaccination failurechild patientsvirus variations