1. Morphine counteracts the antiviral effect of antiretroviral drugs and causes upregulation of p62/SQSTM1 and histone-modifying enzymes in HIV-infected astrocytes.
- Author
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Rodriguez M, Lapierre J, Ojha CR, Pawitwar S, Karuppan MKM, Kashanchi F, and El-Hage N
- Subjects
- Acetyltransferases genetics, Acetyltransferases metabolism, Astrocytes metabolism, Astrocytes virology, Atazanavir Sulfate pharmacology, Chromosomal Proteins, Non-Histone genetics, Chromosomal Proteins, Non-Histone metabolism, Dideoxynucleosides pharmacology, Drug Combinations, Emtricitabine pharmacology, HIV-1 drug effects, HIV-1 growth & development, HIV-1 pathogenicity, Histone Deacetylases genetics, Histone Deacetylases metabolism, Host-Pathogen Interactions drug effects, Host-Pathogen Interactions genetics, Humans, Lopinavir pharmacology, Lysosomes drug effects, Lysosomes metabolism, Lysosomes virology, Membrane Proteins genetics, Membrane Proteins metabolism, Mitochondria drug effects, Mitochondria metabolism, Mitochondria virology, Nuclear Proteins genetics, Nuclear Proteins metabolism, Primary Cell Culture, Protein-Arginine N-Methyltransferases genetics, Protein-Arginine N-Methyltransferases metabolism, Raltegravir Potassium pharmacology, Ritonavir pharmacology, Sequestosome-1 Protein agonists, Sequestosome-1 Protein metabolism, Signal Transduction, Trans-Activators genetics, Trans-Activators metabolism, Virus Replication drug effects, Anti-HIV Agents pharmacology, Astrocytes drug effects, Gene Expression Regulation drug effects, Morphine adverse effects, Narcotics adverse effects, Sequestosome-1 Protein genetics
- Abstract
Accelerated neurological disorders are increasingly prominent among the HIV-infected population and are likely driven by the toxicity from long-term use of antiretroviral drugs. We explored potential side effects of antiretroviral drugs in HIV-infected primary human astrocytes and whether opioid co-exposure exacerbates the response. HIV-infected human astrocytes were exposed to the reverse transcriptase inhibitor, emtricitabine, alone or in combination with two protease inhibitors ritonavir and atazanavir (ERA) with and without morphine co-exposure. The effect of the protease inhibitor, lopinavir, alone or in combination with the protease inhibitor, abacavir, and the integrase inhibitor, raltegravir (LAR), with and without morphine co-exposure was also explored. Exposure with emtricitabine alone or ERA in HIV-infected astrocytes caused a significant decrease in viral replication and attenuated HIV-induced inflammatory molecules, while co-exposure with morphine negated the inhibitory effects of ERA, leading to increased viral replication and inflammatory molecules. Exposure with emtricitabine alone or in combination with morphine caused a significant disruption of mitochondrial membrane integrity. Genetic analysis revealed a significant increase in the expression of p62/SQSTM1 which correlated with an increase in the histone-modifying enzyme, ESCO2, after exposure with ERA alone or in combination with morphine. Furthermore, several histone-modifying enzymes such as CIITA, PRMT8, and HDAC10 were also increased with LAR exposure alone or in combination with morphine. Accumulation of p62/SQSTM1 is indicative of dysfunctional lysosomal fusion. Together with the loss of mitochondrial integrity and epigenetic changes, these effects may lead to enhanced viral titer and inflammatory molecules contributing to the neuropathology associated with HIV.
- Published
- 2019
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