کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9425652 | 1295885 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new role for the renin-angiotensin system in the rat periaqueductal gray matter: Angiotensin receptor-mediated modulation of nociception
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کلمات کلیدی
PBSRASPAGTail flick test - آزمون تلخ تلخAngiotensin receptor antagonists - آنتاگونیست گیرنده آنژیوتانسینangiotensin - آنژیوتانسینangiotensin type 1 receptor - آنژیوتانسین نوع 1 گیرندهAng - اینanalysis of variance - تحلیل واریانسANOVA - تحلیل واریانس Analysis of variancebaseline - خط مقدمtail-flick latency - زمان تاخیر دمRenin–angiotensin system - سیستم رنین-آنژیوتانسینPeriaqueductal gray matter - ماده خاکستری پرایاکوداکتPhosphate-buffered saline - محلول نمک فسفات با خاصیت بافریAT1 receptor - گیرنده AT1AT2 receptor - گیرنده AT2angiotensin type 2 receptor - گیرنده نوع 2 آنژیوتانسین
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A new role for the renin-angiotensin system in the rat periaqueductal gray matter: Angiotensin receptor-mediated modulation of nociception A new role for the renin-angiotensin system in the rat periaqueductal gray matter: Angiotensin receptor-mediated modulation of nociception](/preview/png/9425652.png)
چکیده انگلیسی
Renin-angiotensin (Ang) system (RAS) peptides injected into the periaqueductal gray matter (PAG) elicit antinociception. Saralasin blocks Ang II-elicited antinociception. Thus, it is possible that endogenous RAS peptides could participate on the modulation of nociception in the PAG. This possibility was tested here injecting, in the PAG, the specific Ang type 1 and type 2 receptor (AT1 receptor and AT2 receptor) antagonists losartan and CGP42,112A, respectively, either alone or before Ang II. The effects of Ang II, losartan and CGP42,112A on nociception were measured using the tail flick test and the model of incision allodynia. Ang II increased tail-flick latency, an effect inhibited by both losartan and CGP42,112A. Ang II reduced incisional allodynia. Either losartan or CGP42,112A alone increased incision allodynia, suggesting that endogenous Ang II and/or an Ang-peptide participates in the control of allodynia by the PAG. AT1 and AT2 receptors were immunolocalized in neuronal cell bodies and processes in the ventrolateral PAG. Taken together, the antinociceptive effect of Ang II injection into the ventrolateral PAG, the increase of allodynia elicited by injecting either losartan or CGP42,112A alone in the PAG, and the presence of AT1 and AT2 receptors in neurons and neuronal processes in the same region, represent the first evidence that part of the tonic nociceptive control mediated by the PAG is carried out locally by endogenous Ang II and/or an Ang-peptide acting on AT1 and AT2 receptors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience - Volume 132, Issue 2, 2005, Pages 453-463
Journal: Neuroscience - Volume 132, Issue 2, 2005, Pages 453-463
نویسندگان
A. Pelegrini-da-Silva, A.R. Martins, W.A. Prado,