人免疫缺陷病毒对不同黏膜上皮细胞系的感染能力的研究

目的 研究人免疫缺陷病毒(HIV-1)对不同黏膜上皮细胞系的感染能力.方法 用实验室株HIV-1 SF33和2株原代HIV-1(02010561,02010141)分别感染Caco-2、T斟和HeLa 3株黏膜上皮细胞和MT-4细胞.接种病毒后间隔3～4 d采集培养上清检测Ir24并用实时定量RT-PCR检测病毒载量;采集细胞提取DNA并用PCR法检测感染细胞中病毒DNA和整合入细胞基因组内的捕綝NA.结果 所用3株病毒都可以产毒性地感染阳性对照细胞MT-4,对整合病毒DNA的PCR检测发现它们均能够整合到MT-4细胞基因组内;实验室适应株HIV-1 SF33 虽然能够感染所有3株上皮细胞,但它不能整合入Cacoo2细胞的基因组中;虽然2株原代分离病毒均能感染T-84细胞,但只有HIV-1 02020141能够整合入T-84细胞的基因组中,原代分离病毒HIV-1 02010561能够感染HeLa细胞,但不能整合到其基因组中.结论 虽然HIV-1的实验室毒株和原代分离毒株都可能感染黏膜上皮细胞,但它们在黏膜上皮细胞中建立稳定产毒性感染(感染并产生病毒)的能力因细胞和毒株不同而异.

Infectivity of different human immunodeficiency virus strains for mucosal epithelial cell lines

Objective To compare the infectivity between laboratory adapted human inununodefi- ciency virus(HIV-1) and primary HIV-1 isolates for different mucosal epithelial cell lines. Methods Mu-cosal epithelial cells Caco-2, T-84, HeLa and lymphocyte MT-4 were infected with laboratory adapted HIV-1 SF33 and 2 primary HIV-1 isolates (02010561, 02010141). Culture supernatant and cells were collected respectively on 3-4 days interval after virus inoculation. The former was tested for HIV-1 antigen P24 level and viral load, and the latter was tested for total viral DNA and integrated viral DNA. Results All 3 virus strains could infect MT-4 cells and integrate into their genome. Only HIV-1 SF33 could infect Caco-2 cells but could not integrate into their genomic DNA. Both HIV-1 SF33 and 02010561 infected HeLa cells but only integration of HIV-1 SF33 was detected. All the 3 HIV-1 strains infected T-84 cells but only the integra-tion of HIV-1 SF33 and 02010141 was observed. Conclusion Although laboratory adapted and primary HIV-1 strains are able to infect human mucosal epithelial cell lines, transient or productive infection estab-lished in different mucosal epithelial cells is dependent on the character of cells and virus strains.