کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2200689 1099960 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
β-Funaltrexamine inhibits chemokine (CXCL10) expression in normal human astrocytes
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
β-Funaltrexamine inhibits chemokine (CXCL10) expression in normal human astrocytes
چکیده انگلیسی

Neuroinflammation is an integral component of neurodegenerative disorders, CNS infection and trauma. Astroglial chemokines, such as CXCL10, are instrumental in neuroinflammatory signaling as well as neurotoxicity. We have utilized proinflammatory-induced CXCL10 expression in normal human astrocytes (NHA) as a model in which to assess the anti-inflammatory actions of the selective, mu-opioid receptor (MOR) antagonist, β-funaltrexamine (β-FNA). Interferon (IFN)γ + HIV-1 Tat-induced CXCL10 expression (secreted protein and mRNA) was inhibited by co-treatment with β-FNA. Neither the MOR-selective antagonist, D-Phe-Cys-Tyr-D-Trp-Arg-Pen-Thr-NH2 (CTAP) nor the nonselective opioid receptor antagonist, naltrexone inhibited IFNγ + HIV-1 Tat-induced CXCL10 expression. Furthermore, co-treatment with excess CTAP or naltrexone did not prevent β-FNA mediated inhibition of IFNγ + HIV-1 Tat-induced CXCL10 expression. Additionally, we utilized an inhibitor of NF-κB activation (SN50) to demonstrate that IFNγ + HIV-1 Tat-induced CXCL10 expression is NF-κB-dependent in NHA. Subsequent experiments revealed that β-FNA did not significantly affect NF-κB activation. Interestingly, we discovered that β-FNA inhibited p38 activation as indicated by decreased expression of phospho-p38. Together, these findings suggest that the inhibitory actions of β-FNA are MOR-independent and mediated, in part, via a transcriptional mechanism. These findings add to our understanding of the mechanism by which chemokine expression is inhibited by β-FNA. In conjunction with future investigations, these novel findings are expected to provide insights into the development of safe and effective treatments for neuroinflammation.


► IFNγ + HIV-1 Tat induces CXCL10 expression in human astrocytes.
► β-FNA inhibits IFNγ + HIV-1 Tat induced CXCL10 expression.
► Inhibitory actions of β-FNA are not mediated through the mu-opioid receptor.
► β-FNA does not inhibit IFNγ + HIV-1 Tat induced NF-κB activation.
► β-FNA inhibits IFNγ + HIV-1 Tat induced p38 activation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurochemistry International - Volume 62, Issue 4, March 2013, Pages 478–485
نویسندگان
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