کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6276973 | 1295746 | 2010 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultraviolet irradiation of the eye and Fos-positive neurons induced in trigeminal brainstem after intravitreal or ocular surface transient receptor potential vanilloid 1 activation
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کلمات کلیدی
c-fosUVRTRGc-Fos immunohistochemistryIVTTBNCtrigeminal brainstem nuclear complexNTSVc/C1CGRPTRPV1PBSFos-LI - FOS-LIUltraviolet irradiation - اشعه ماوراء بنفشUV irradiation - اشعه ماوراء بنفشOcular inflammation - التهاب چشمtrigeminal subnucleus interpolaris - اینترنالالری زیر هسته سه گانهintravitreal - داخل شیشهTrigeminal subnucleus caudalis - ساب گلبول قرمز Trigeminal caudalisPhosphate buffered saline - فسفات بافر شورnucleus tractus solitarius - هسته دستگاه انفرادیTransient receptor potential vanilloid 1 - پتانسیل گیرنده گذرا وانیلیوئید 1calcitonin gene-related peptide - پپتید مرتبط با ژن کلسی تونینtrigeminal root ganglion - گانگلیون ریشه سه حلقه ای
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The interior structures of the eye are well supplied by the trigeminal nerve; however, the function of these afferent fibers is not well defined. The aim of this study was to use c-fos like immunohistochemistry (Fos-LI) to map the trigeminal brainstem complex after intravitreal microinjection or ocular surface application of capsaicin, a selective transient receptor potential vanilloid 1 (TRPV1) agonist in male rats under barbiturate anesthesia. The effect of ocular inflammation on Fos-LI was tested 2 or 7 days after UV irradiation of the eye. In non-inflamed controls, intravitreal capsaicin produced peaks of Fos-LI at the trigeminal subnucleus interpolaris/caudalis (Vi/Vcvl) transition and in superficial laminae at the caudalis/upper cervical cord (Vc/C1) junction regions. At the Vc/C1 junction intravitreal capsaicin induced Fos-LI in a dose-dependent manner, while at the Vi/Vcvl transition responses were similar after vehicle or capsaicin injections. Two days, but not 7 days, after UV irradiation intravitreal and ocular surface capsaicin-evoked Fos-LI at the Vc/C1 junction and nucleus tractus solitarius (NTS) were markedly enhanced, whereas the responses at the Vi/Vcvl transition were not different from non-inflamed controls. More than 80% of trigeminal ganglion neurons labeled after intravitreal microinjection of Fluorogold also expressed immunoreactivity for the TRPV1 receptor. These findings suggested that most intraocular trigeminal sensory nerves serve as nociceptors. The similar pattern and magnitude of Fos-LI after capsaicin suggested that TRPV1-responsive trigeminal nerves that supply intraocular and ocular surface tissues form a unified integrative circuit in the caudal brainstem. Intensity coding of capsaicin concentration and facilitation of Fos-LI expression after UV irradiation strongly supported the hypothesis that the Vc/C1 junction was critical for nociceptive processing related to ocular pain, whereas the Vi/Vcvl transition region likely served other functions in ocular homeostasis under naïve and inflamed conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience - Volume 170, Issue 2, 13 October 2010, Pages 678-685
Journal: Neuroscience - Volume 170, Issue 2, 13 October 2010, Pages 678-685
نویسندگان
Z. Chang, K. Okamoto, A. Tashiro, D.A. Bereiter,