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Effects of HIV-1 tat on secretion of TNF-α and IL-1β by U87 cells in AIDS patients with or without AIDS dementia complex / 生物医学与环境科学(英文)
Biomedical and Environmental Sciences ; (12): 111-117, 2014.
Article in English | WPRIM | ID: wpr-247077
ABSTRACT
<p><b>OBJECTIVE</b>To explore the role of HIV-1 tat gene variations in AIDS dementia complex (ADC) pathogenesis.</p><p><b>METHODS</b>HIV-1 tat genes derived from peripheral spleen and central basal ganglia of an AIDS patient with ADC and an AIDS patient without ADC were cloned for sequence analysis. HIV-1 tat gene sequence alignment was performed by using CLUSTAL W and the phylogentic analysis was conducted by using Neighbor-joining with MEGA4 software. All tat genes were used to construct recombinant retroviral expressing vector MSCV-IRES-GFP/tat. The MSCV-IRES-GFP/tat was cotransfected into 293T cells with pCMV-VSV-G and pUMVC vectors to assemble the recombinant retrovirus. After infection of gliomas U87 cells with equal amount of the recombinant retrovirus, TNF-α, and IL-1β concentrations in the supernatant of U87 cells were determined with ELISA.</p><p><b>RESULTS</b>HIV-1 tat genes derived from peripheral spleen and central basal ganglia of the AIDS patient with ADC and the other one without ADC exhibited genetic variations. Tat variations and amino acid mutation sites existed mainly at Tat protein core functional area (38-47aa). All Tat proteins could induce U87 cells to produce TNF-α and IL-1β, but the level of IL-1β production was different among Tat proteins derived from the ADC patient's spleen, basal ganglia, and the non-ADC patient's spleen. The level of Tat proteins derived from the ADC patient's spleen, basal ganglia, and the non-ADC patient's spleen were obviously higher than that from the non-ADC patient's basal ganglia.</p><p><b>CONCLUSION</b>Tat protein core functional area (38-47aa) may serve as the key area of enhancing the secretion of IL-1β. This may be related with the neurotoxicity of HIV-1 Tat.</p>
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Pathology / Physiology / Spleen / Basal Ganglia / Virology / Virulence / Molecular Sequence Data / Gene Expression Regulation, Viral / Genes, tat / Neuroglia Limits: Adult / Humans Language: English Journal: Biomedical and Environmental Sciences Year: 2014 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Pathology / Physiology / Spleen / Basal Ganglia / Virology / Virulence / Molecular Sequence Data / Gene Expression Regulation, Viral / Genes, tat / Neuroglia Limits: Adult / Humans Language: English Journal: Biomedical and Environmental Sciences Year: 2014 Type: Article