Cocaine serves as a cofactor for susceptibility to HIV infection and AIDS progression. Cocaine also increases HIV-1 replication in peripheral blood mononuclear cells and enhances viral load in animal models. Furthermore, HIV positive cocaine users have lower CD4+ T cell counts and have a significant acceleration of decline of CD4+ T cells. Since CD4+ T cells are primary targets for HIV-1 infection and replication in vivo, it is imperative to understand the effects of cocaine on CD4+ T cell biology. This application proposes a potentially novel mechanism by which cocaine may increase HIV-1 replication. It has been proposed that cocaine enhances HIV-1 replication by regulating viral entry. Our preliminary data suggest modulation of HIV-1 post entry steps by cocaine. Our data also reveal that cocaine down regulates two anti-HIV cellular microRNAs (miRNAs), miR-125b and miR-328 in primary CD4+ T cells. Since these miRNAs target the 3'UTR of HIV-1 mRNA, we believe cocaine may target post-transcription steps of HIV-1 replication. Therefore, we hypothesize that enhanced HIV-1 replication and increased viral load by cocaine is mediated by down regulation of cellular anti-HIV miRNAs. Since HIV infected cocaine users have higher viral loads and increased risk of progression to AIDS, our findings will have far reaching implications in drug use and HIV biology. We will test our hypothesis by focusing on two aims.
Aim 1 : Determine effects of cocaine-induced down-regulation of anti-HIV cellular miRNAs on HIV-1 replication.
Aim 2 : Examine whether cocaine-induced down-regulation of anti-HIV cellular miRNAs activate latently infected HIV-1.

Public Health Relevance

Drug use remains the second most common mode of exposure to HIV and illicit drugs serve as cofactors for susceptibility to HIV infection and disease progression. Although cocaine has been shown to enhance HIV infection and replication, the underlying mechanism remains unclear. Therefore, the focus of this proposal is to delineate the mechanism by which cocaine contributes to HIV/AIDS.

National Institute of Health (NIH)
National Institute on Drug Abuse (NIDA)
Small Research Grants (R03)
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Special Emphasis Panel (ZRG1-AARR-D (58))
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Pollock, Jonathan D
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Meharry Medical College
Internal Medicine/Medicine
Schools of Medicine
United States
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Dash, Sabyasachi; Balasubramaniam, Muthukumar; Dash, Chandravanu et al. (2018) Biotin-based Pulldown Assay to Validate mRNA Targets of Cellular miRNAs. J Vis Exp :
Dong, Xin-Hong; Ho, Meng-Hsuan; Liu, Bindong et al. (2018) Role of Porphyromonas gingivalis outer membrane vesicles in oral mucosal transmission of HIV. Sci Rep 8:8812
Balasubramaniam, Muthukumar; Zhou, Jing; Addai, Amma et al. (2018) PF74 Inhibits HIV-1 Integration by Altering The Composition of the Preintegration Complex. J Virol :
Balasubramaniam, Muthukumar; Pandhare, Jui; Dash, Chandravanu (2018) Are microRNAs Important Players in HIV-1 Infection? An Update. Viruses 10:
Welch, Jennifer L; Madison, Marisa N; Margolick, Joseph B et al. (2017) Effect of prolonged freezing of semen on exosome recovery and biologic activity. Sci Rep 7:45034
Dash, Sabyasachi; Balasubramaniam, Muthukumar; Rana, Tanu et al. (2017) Poly (ADP-Ribose) Polymerase-1 (PARP-1) Induction by Cocaine Is Post-Transcriptionally Regulated by miR-125b. eNeuro 4:
Balasubramaniam, Muthukumar; Davids, Benem; Addai, Amma B et al. (2017) Measurement of In Vitro Integration Activity of HIV-1 Preintegration Complexes. J Vis Exp :
Swepson, Chelsie; Ranjan, Alok; Balasubramaniam, Muthukumar et al. (2016) Cocaine Enhances HIV-1 Transcription in Macrophages by Inducing p38 MAPK Phosphorylation. Front Microbiol 7:823
Kaneshiro, Bliss; Edelman, Alison; Dash, Chandravanu et al. (2016) Effect of oral contraceptives and doxycycline on endometrial MMP-2 and MMP-9 activity. Contraception 93:65-9
Beni, Yousef; Dash, Chandravanu; Parang, Keykavous (2015) Synthesis of ?-triphosphotriester pronucleotides. Tetrahedron Lett 56:2247-2250

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