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• W2021061796 abstract "Abstract With the increasing prevalence of HIV‐associated neurocognititve disorders (HAND), understanding the mechanisms by which HIV‐1 induces neuro‐inflammation and subsequent neuronal damage is important. The hallmark features of HIV‐encephalitis, the pathological correlate of HIV‐associated Dementia (HAD), are gliosis, oxidative stress, chemokine dysregulation, and neuronal damage/death. Since neurons are not infected by HIV‐1, the current thinking is that these cells are damaged indirectly by pro‐inflammatory chemokines released by activated glial cells. CXCL10 is a neurotoxic chemokine that is upregulated in astroglia activated by HIV‐1 Tat, IFN‐γ, and TNF‐α. In this study we have demonstrated that HIV‐1 Tat increases CXCL10 expression in IFN‐γ and TNF‐α stimulated human astrocytes via NADPH oxidase. We have shown that the treatment of astrocytes with a mixture of Tat and cytokines leads to a respiratory burst that is abrogated by apocynin, an NADPH oxidase inhibitor. Pretreatment of Tat, IFN‐γ, and TNF‐α stimulated astrocytes with apocynin also resulted in concomitant inhibition of CXCL10 expression. Additionally, apocynin was also able to reduce Tat and cytokine‐mediated activation of the corresponding signaling molecules Erk1/2, Jnk, and Akt with a decrease in activation and nuclear translocation of NF‐κB, important regulators of CXCL10 induction. Understanding the mechanisms involved in reducing both oxidative stress and the release of pro‐inflammatory agents could lead to the development of therapeutics aimed at decreasing neuro‐inflammation in patients suffering from HAD. © 2009 Wiley‐Liss, Inc." @default.
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• W2021061796 date "2009-11-25" @default.
• W2021061796 modified "2023-10-16" @default.
• W2021061796 title "Cooperative induction of CXCL10 involves NADPH oxidase: Implications for HIV dementia" @default.
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• W2021061796 doi "https://doi.org/10.1002/glia.20949" @default.
• W2021061796 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2820595" @default.
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