Project description:Finding the differences in gene expression in three regions of the brai, basal ganglia, white matter, and frontal cortex, in normal, HIV infected, HIV inefected with neurocognitive impairment, and HIV infected with both neurocognitive impairment and encephalitis patients. We used microarrays to identify differentially expressed genes in normal, HIV infected, HIV inefected with neurocognitive impairment, and HIV infected with both neurocognitive impairment and encephalitis patients. Samples from three different brain regions from normal, HIV infected, HIV infected with neurocognitive impairment (HAD: HIV-associated dementia), and HIV infected with both neurocognitive impairment and encephalitis (HIVE: HIV encephalitis) patients were collected for RNA isolation and supsequent Affymetrix microarray analysis. We sought to obtain gene expression levels in different brain regions to find implication of HIV and the neurological impairment and inflammation associated with HIV infection.
Project description:Finding the differences in gene expression in three regions of the brain, basal ganglia, white matter, and frontal cortex, in normal, HIV infected, HIV infected with neurocognitive impairment, and HIV infected with both neurocognitive impairment and encephalitis patients.
Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
Project description:Objective: To elucidate molecular mechanisms of neurocognitive dysfunction in long-term HIV-infected individuals by assessing the microRNA (miR) profile and determining clinical and neurocognitive correlates to miR expression. Design: Analysis of miR profile in frontal cortex of retrospectively-identified autopsy cases of longitudinally-followed subjects with HIV-infection and age/sex-matched controls. HIV-subjects had semi-annual neuropsychiatric and clinical testing, at autopsy, tissue was archived. Methods: MiR repertoires were profiled from frontal cortices. Analysis of variance (ANOVA) and Tukey Honestly Sigificant Difference (HSD) tests with Benjamini-Hochberg correction for multiple comparisons were used to compare expression among the three groups. Pairwise correlations were used to identify neuropsychiatric variable that correlatee with expression of miRs. Results: MiRs were significantly different by HIV-status: miR-103, miR-125a, miR-380, miR-422a, miR-515, miR-520b, miR0618, miR-886, and miR-9. Many miRs correlated with neuropsychiatric outcomes like Learning, Memory, Executive, Verbal, and Motor deficit scores. Conclusions: MiRs are clearly dysregulated in the frontal cortex of HIV-positive individuals. Only a few miRs were significantly dysregulated in only the methamphetamine group. Our study identifies miRs that form rational targets for further inquiry on biochemical mechanisms of HIV-related neurocognitive deficits. Learning deficit score correlates with expression of more miRs than other parameters. A total of 11 HIV positive individuals were analyzed, 5 of which had a past history of methamphetamine ABUSE, and 5 age-matched HIV-negative normal Controls. Technical duplicates are included. Included are clinical and neuropsychiatric data from most recent visit before time of death. This is a retrospective autopsy study of longitudinally-followed subjects on miRNA levels in the frontal cortex.