Construction of recombinant adenovirus containing TK gene and its effect against human liver cancer cells / 南方医科大学学报

<p><b>OBJECTIVE</b>To construct a replication-defective adenovirus containing TK gene and investigate the killing effects of TK gene against human liver cancer cells SMMC-7721.</p><p><b>METHODS</b>The recombinant adenovirus ADV-TK was constructed using homologous recombination in the cells. SMMC-7721 cells transfected with recombined adenovirus were exposed to GCV, and the cell viability was measured by MTT assays.</p><p><b>RESULTS</b>The recombinant adenovirus containing TK gene was successfully constructed. Transfection by the recombinant adenovirus ADV-TK and GCV exposure significantly suppressed the growth of SMMC-7721 cells.</p><p><b>CONCLUSION</b>A replication-defective adenovirus containing TK gene has been successfully constructed, and in combination with GCV, the recombinant adenovirus produces significant killing effect against SMMC-7721 cells in vitro.</p>

HLA-B Alleles Associated with Susceptibility or Resistance to Human Immunodeficiency Virus Type 1 in a Xinjiang Uygur Population, China / 中国病毒学

Host genetic factors, such as human leukocyte antigen (HLA) alleles, are important in Human immunod-eficiency virus (HIV) infection and its progression to AIDS. HLA class I genes, especially highly polymorphicHLA-B genes, are involved in the activation of HLA-restricted cytotoxic T lymphocytes (CTLs) against HIV, andthus control susceptibility to or protect against this virus. The present study was aimed to determine the distributionof HLA-B alleles in the Chinese Uygur ethnic group and its association with HIV infection. One hundred ten healthycontrol (HIV negative) and 128 HIV positive Chinese Xinjiang Uygur ethnic individuals were used in this study.HLA typing for B allele was performed by polymerase chain reaction (PCR) with sequence-specific primers (SSP).Hardy-Weinberg equilibrium was calculated using POPGENE software for the healthy control group. The HLA-Bfrequency of each allele was compared between the patients and the controls using the chi-square test. In HIV-1-pos-itive group, gene frequency of allele B * 4901 was significantly higher compared to the healthy control subjects (P=0.02, OR=3.06, 95%CI=1.16～8.10 forB*4901). In contrast, the gene frequency of B * 40 in healthy controlswas significantly higher than in the HIV-positive patients (P=0.02, OR=0.39, 95%CI=0.07～0. 92 for B* 40).In this study, HLA allele B * 4901 may be associated with increased susceptibility to HIV-1 infection, whereas the B* 40 allele may be associated with resistance to H HIV-1 infection.

Genetic polymorphism of human immunodeficiency virus coreceptor CCR5Delta32 and CCR2-64I alleles in Chinese Yi Ethnic group in Sichuan / 中华流行病学杂志

<p><b>OBJECTIVE</b>To explore genetic polymorphisms CCR5 of HIV coreceptor and CCR2 in Chinese Yi Ethnic group in Sichuan.</p><p><b>METHODS</b>Genomic DNA samples were obtained from 119 healthy individuals and 88 HIV-1 infected individuals of Chinese Yi Ethnic group in Sichuan. Polymerase chain reaction (PCR), cloning and gene sequencing techniques were employed to identify the genotype of CCR5Delta32; PCR-restriction fragment length polymorphism (RFLP) and gene sequencing were employed to identify the CCR2-64I alleles.</p><p><b>RESULTS</b>At CCR5 locus, 2 heterozygotes (CCR5-wt/Delta32) and none homozygote (CCR5-Delta32/Delta32) were observed in 119 healthy individuals, allelic frequency of CCR5-Delta32 was 0.84%; No mutant was found in 88 HIV-1 infected individuals. At CCR2 locus, 26 heterozygotes (CCR2-64V/64I) and two homozygotes (CCR2-64I/64I) were observed in healthy individuals but the allelic frequency CCR2-64I was 12.61%. Among infected individuals, 12 heterozygotes (CCR2-64V/64I) and 7 homozygotes (CCR2-64I/64I) were observed and the allelic frequency CCR2-64I was 13.27%. Statistical analysis revealed that the differences of both loci between healthy and infected individuals were insignificant. Both loci were consistent with the Hardy-Weinberg equilibrium in the two different groups.</p><p><b>CONCLUSION</b>The polymorphism of CCR5Delta32 and CCR2-64I alleles from Chinese Yi Ethnic group was detected which was of significance for the evaluation of genetic resistance to HIV-1 infection in Chinese population.</p>

Association of HLA-B alleles with human immunodeficiency virus type 1 infection in the Yi ethnic group in Sichuan province / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To determine the distribution of HLA-B alleles in the Chinese Yi ethnic group and its association with HIV infection.</p><p><b>METHODS</b>One hundred and six unrelated healthy HIV negative and 73 HIV positive Chinese Yi ethnic individuals were typed by PCR-SSP.</p><p><b>RESULTS</b>The frequency of alleles B*07, Bx 35, and B*46 were increased in HIV-1-positive subjects, whereas the alleles B*55, B*44 and B*78 were absent in the HIV-infected persons studied. The B*46 allele was present in a significantly higher gene frequency among HIV-1-positive individuals (P=0.02, OR=3.32, 95% CI=1.13-9.78) compared with control subjects.</p><p><b>CONCLUSION</b>HLA-B*46 may be associated with its susceptibility to HIV-1 infections.</p>