Inhibitory effect of resveratrol against enterovirus type 71 in vitro / 南方医科大学学报

<p><b>OBJECTIVE</b>To observe the inhibitory effect of resveratrol against the cytopathogenicity of enterovirus type 71.</p><p><b>METHODS</b>The cytotoxicity of resveratrol on Vero cells was detected using cell counting kit-8 (CCK-8). The antiviral activity of resveratrol in different stages of infection, with ribavirin as the control, was evaluated by determining the virus inhibition rate, medium effective concentration (IC(50)), and selection index (SI).</p><p><b>RESULTS</b>Resveratrol was nonpoisonous to Vero cells with an median toxic concentration (TC50) of 307.6 mmol/L. Resveratrol produced an obvious inhibitory effect against enterovirus type 71 only before the cell infection by the virus (IC(50)=20.2 mmol/L , SI=15.2), and once the cells were infected, resveratrol no longer had such antiviral effect.</p><p><b>CONCLUSIONS</b>Resveratrol may offer some protection against enterovirus type 71 in vitro.</p>

Association of CCR5, CCR2 and SDF1 gene polymorphisms with HIV-1 infection in Chinese population: a meta-analysis / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the association of CCR5δ32, CCR2-64I and SDFl-3 A gene polymorphisms with HIV-1-infection in Chinese population.</p><p><b>METHODS</b>A meta-analysis was performed to identify case-control studies of CCR5δ32, CCR2-64I and SDFl-3 A polymorphisms from the literatures.</p><p><b>RESULTS</b>Fourteen studies of CCR5δ32 were found, involving a total of 1607 cases and 1632 controls. Compared with the wild-type homozygote wt/wt, the pooled odds ratios (95%CI) of wt/mt, mt/mt, and wt/mt+mt/mt genotypes of CCR5δ32 gene polymorphisms were 1.156 (0.808, 1.654), 0.997 (0.198, 5.022), and 1.149 (0.808, 1.634), respectively. Twelve studies of CCR2-64I were identified, including 1415 cases and 1239 controls. Compared with the wild-type homozygote wt/wt, the pooled odds ratios (95%CI) of wt/mt, mt/mt, and wt/mt+mt/mt genotypes of CCR2-64I gene polymorphisms were 1.005 (0.844, 1.197), 1.191 (0.808, 1.754), and 1.028 (0.870, 1.214), respectively. Ten studies of SDFl-3 A were found, involving 1179 cases and 1003 controls. Compared with the wild-type homozygote wt/wt, the pooled odds ratios (95%CI) of wt/mt, mt/mt, and wt/mt + mt/mt genotypes of SDF1-3 A gene polymorphisms were 1.010 (0.830, 1.228), 1.188 (0.860, 1.643), and 1.038 (0.861, 1.250).</p><p><b>CONCLUSION</b>CCR5δ32, CCR2-64I and SDFl-3 A gene polymorphisms do not show strong correlations to HIV-1-infection in Chinese population. These 3 genes may not have protective effect against HIV-1 infection in Chinese population, suggesting the susceptibility of Chinese population to the infection.</p>

Study on serum p53 protein in cops in Guangzhou city / 中华流行病学杂志

<p><b>OBJECTIVE</b>Serum p53 protein overexpression was detected in population exposed to traffic exhaust gas to study the relation between traffic exhaust gas and the increased risk in p53 gene mutation.</p><p><b>METHODS</b>Serum p53 protein expression was measured by enzyme-linked immunosorbent assay. Relationship between different types of job and serum p53 protein overexpression were studied by pearson Chi-square tests.</p><p><b>RESULTS</b>Results on serum p53 protein overexpression on jobs outside of office (5.74%) were not significantly higher than jobs inside the office. However, it suggested that traffic police men (12.12%) working outside of office, with whose length of service longer than 30 years had a significant overexpression of serum p53 protein than the others (5.36%) whose length of service was less than 30 years (P < 0.05, OR = 2.43, 95% CI: 1.11 - 5.33). Overexpression rate of p53 protein appeared to be 6.89% in the group whose average weekly exposure hours were more than 40 hours, which was significant higher than the group whose exposed hours were less than 40 hours (P < 0.05, OR = 1.71, 95% CI: 1.03 - 2.81).</p><p><b>CONCLUSION</b>The result suggested that traffic exhaust gas was likely to cause mutation of p53 gene and increasing the incidence of lung cancer.</p>