Conditional expression of HIV-1 tat in the mouse alters the onset and progression of tonic, inflammatory and neuropathic hypersensitivity in a sex-dependent manner.
Conditional expression of HIV-1 tat in the mouse alters the onset and progression of tonic, inflammatory and neuropathic hypersensitivity in a sex-dependent manner.
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HIV-1 TAT在小鼠中的有条件表达改变了以性依赖性方式的增强性,炎症性和神经性超敏反应的发作和进展。
DOI:
10.1002/ejp.1618
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发表时间:
2020-09
期刊:
影响因子:
--
通讯作者:
Damaj MI
中科院分区:
文献类型:
--
作者:
Bagdas D;Paris JJ;Carper M;Wodarski R;Rice ASC;Knapp PE;Hauser KF;Damaj MI
At least one third of HIV-1-afflicted individuals experience peripheral neuropathy. Although the underlying mechanisms are not known, they may involve neurotoxic HIV-1 proteins. We assessed the influence of the neurotoxic HIV-1 regulatory protein, Tat, on inflammatory and neuropathic nociceptive behaviors using transgenic male and female transgenic mice that conditionally expressed (or did not express) HIV-1 Tat1–86 in glial fibrillary acidic protein-expressing glia in the central and peripheral nervous systems. Tat induction significantly attenuated the time spent paw-licking following formalin injection (2.5%, i.pl.) in both male and female mice. However, significant sex differences were observed in the onset and magnitude of inflammation and sensory sensitivity following complete Freund’s adjuvant (CFA) injection (10%, i.pl.) after Tat activation. Unlike female mice, males showed a significant attenuation of paw swelling and an absence of mechanical/thermal hypersensitivity in response to CFA after Tat induction. Male Tat(+) mice also showed accelerated recovery from chronic constrictive nerve injury (CCI)-induced neuropathic mechanical and thermal hypersensitivity compared to female Tat(+) mice. Morphine (3.2 mg/kg) fully reversed CCI-induced mechanical hypersensitivity in female Tat(−) mice, but not in Tat(+) females. The ability of Tat to decrease edema, paw swelling, and limit allodynia suggest a sequela of events in which Tat-induced functional deficits precede the onset of mechanical hypersensitivity. Moreover, HIV-1 Tat attenuated responses to inflammatory and neuropathic insults in a sex-dependent manner. HIV-1 Tat appears to directly contribute to HIV sensory neuropathy and reveals sex differences in HIV responsiveness and/or the underlying peripheral neuroinflammatory and nociceptive mechanisms.
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