ObjectiveTo investigate the relationship between the G196A and C270T polymorphism and epilepsy.MethodsDatabase including PubMed, EMbase, the Cochrane Library, CNKI and Wan fang data were retrieved upto September, 2017 to collect the case-control study concerning BDNF two polymorphisms G196A/C270T and epilepsy. Two reviewers independently screened the literature, extracted the data, and assessed the quality of methodology. Then Meta-analysis was performed using RevMan 5.2 software.Results①A total of 9 studies were included in the Meta-analysis between BDNF G196A and epilepsy. The studies included 1841 epilepsy patients and 6467 healthy control subjects. The G allele increase the risk of epilepsy[OR=1.13, 95%CI (1.06–1.21), P=0.0001]. When stratified by Asian and western subgroup, a similar trend of associated was detected with Asian epilepsy patients [OR=1.13, 95%CI (1.05–1.20), P=0.0004]. When stratified by epilepsy type, the G allele increase the risk of temporal lobe epilepsy [OR=1.18, 95%CI (1.04–1.34), P=0.008]. ② The Meta-analysis between BDNF C270T and epilepsy included 4 studies, 594 epilepsy patients and 738 healthy control subjects. The result suggested the frequency of the CT genotype and of the C270T T allele was not associated with epilepsy.ConclusionsBDNF G196A polymorphism is a susceptibility locus for temporal lobe epilepsy and Asian epilepsy patients.
ObjectiveTo explore the single locus mutation that related to hepatitis B virus (HBV) co-infection by means of genome-wide association study (GWAS) in Chinese Han patients with pulmonary tuberculosis (TB).MethodsA total of 946 patients with pulmonary TB enrolled between March 2013 and March 2018 were genotyped by Illumina Human Omni Express gene chip. After quality control, 389 972 single nucleotide polymorphisms (SNPs) of 703 patients with single TB infection and 53 patients with TB-HBV co-infection were included in the follow-up association analysis.ResultsThe SNP with the strongest statistical correlation signal was rs118122819 (P=2.923×10−12, odds ratio=7.933) located on chromosome 8p23.1. Other potential susceptibility genes included CDH4 (rs73309833), MARCH1 (rs3797020), and DNER (rs13393112), etc. In addition, a strong linkage imbalance between rs118122819 and rs4840365 (D’=0.88, r2=0.76) was found, while rs4840365 was located in the MFHAS1 gene region.ConclusionsThis study provides evidence for the presence of susceptibility gene locus for HBV co-infection in pulmonary TB patients, and provides important clues for the mechanism research, disease prevention, and treatment of co-infection. But these associations must be replicated and validated in larger studies.