کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4313671 | 1290006 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Nuclear factor-kappa B mediates TRPV4–NO pathway involved in thermal hyperalgesia following chronic compression of the dorsal root ganglion in rats Nuclear factor-kappa B mediates TRPV4–NO pathway involved in thermal hyperalgesia following chronic compression of the dorsal root ganglion in rats](/preview/png/4313671.png)
The aim of this study was to test the hypothesis that nuclear factor-kappa B (NF-κB) is involved in TRPV4–NO pathway in thermal hyperalgesia following chronic compression of the dorsal root ganglion (DRG) (the procedure hereafter termed CCD) in rat. Intrathecal administration of two NF-κB inhibitors, pyrrolidine dithiocarbamate (PDTC; 10−1 to 10−2 M) and BAY (100–50 μM), both induced significantly dose-dependent increase in the paw withdrawal latency (PWL) and decrease in nitric oxide (NO) content in DRG when compared with control rats. Pretreatment with 4α-phorbol 12,13-didecanoate (4α-PDD, transient receptor potential vanilloid 4 (TRPV4) synthetic activator, 1 nm) attenuated the suppressive effects of PDTC (10−1 M) and BAY (100 μM) on CCD-induced thermal hyperalgesia and NO production. In addition, Western blot analysis indicated that CCD rats exhibited nuclear NF-κB protein expression and low levels of cytoplasmic inhibitory-kappa B (I-κB) expression; the increase in NF-κB expression and decrease in I-κB expression were reversed after intrathecal injection of PDTC. In conclusion, our data suggested that NF-κB could be involved in TRPV4–NO pathway in CCD-induced thermal hyperalgesia.
► NF-κB inhibitors, PDTC and BAY, increased the PWL and decreased NO content in CCD.
► The effects of NF-κB inhibitors were attenuated by TRPV4 activator, 4α-PDD.
► TRPV4 induced NO production through activation of NF-κB pathway in the CCD rats.
Journal: Behavioural Brain Research - Volume 221, Issue 1, 1 August 2011, Pages 19–24