کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
914581 | 1473244 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hyperalgesia induced by spinal and peripheral hydrogen sulfide: Evidence for involvement of Cav3.2 T-type calcium channels
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب سلولی و مولکولی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hyperalgesia induced by spinal and peripheral hydrogen sulfide: Evidence for involvement of Cav3.2 T-type calcium channels Hyperalgesia induced by spinal and peripheral hydrogen sulfide: Evidence for involvement of Cav3.2 T-type calcium channels](/preview/png/914581.png)
چکیده انگلیسی
Hydrogen sulfide (H2S), a gasotransmitter, facilitates membrane currents through T-type Ca2+ channels, and intraplantar (i.pl.) administration of NaHS, a donor of H2S, causes prompt hyperalgesia in rats. In this context, we asked whether intrathecal (i.t.) administration of NaHS could mimic the hyperalgesic effect of i.pl. NaHS in rats, and then examined if Cav3.2 isoform of T-type Ca2+ channels contributed to the pro-nociceptive effects of i.t. and i.pl. NaHS. Either i.t. or i.pl. administration of NaHS rapidly decreased nociceptive threshold in rats, as determined by the paw pressure method. The hyperalgesia caused by i.t. and i.pl. NaHS was abolished by co-administration of mibefradil, a pan-T-type Ca2+ channel inhibitor, and also suppressed by pretreatment with i.t. and i.pl. zinc chloride, known to preferentially inhibit Cav3.2 among T-type Ca2+ channel isoforms, respectively. Repeated i.t. administration of antisense oligodeoxynucleotides (ODNs) targeting rat Cav3.2, but not mismatch ODNs, caused silencing of Cav3.2 protein in the dorsal root ganglia and spinal cord, and then attenuated the hyperalgesia induced by either i.t. or i.pl. NaHS. Our findings thus establish that spinal and peripheral NaHS/H2S activates or sensitizes Cav3.2 T-type Ca2+ channels expressed in the primary afferents and/or spinal nociceptive neurons, leading to sensitization of nociceptive processing and hyperalgesia.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pain - Volume 142, Issues 1â2, March 2009, Pages 127-132
Journal: Pain - Volume 142, Issues 1â2, March 2009, Pages 127-132
نویسندگان
Yumi Maeda, Yuka Aoki, Fumiko Sekiguchi, Maho Matsunami, Tomoko Takahashi, Hiroyuki Nishikawa, Atsufumi Kawabata,