کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4344026 1615149 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
CGRP inhibits norepinephrine induced apoptosis with restoration of Bcl-2/Bax in cultured cardiomyocytes of rat
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
CGRP inhibits norepinephrine induced apoptosis with restoration of Bcl-2/Bax in cultured cardiomyocytes of rat
چکیده انگلیسی


• Norepinephrine increases apoptosis of cardiomyocytes.
• Norepinephrine increases Bax and reduces Bcl-2 and ratio of Bcl-2/Bax.
• CGRP increases Bcl-2 and ratio of Bcl-2/Bax in cardiomyocytes.
• CGRP attenuates norepinephrine induced apoptosis of cardiomyocytes.

Calcitonin gene related peptide (CGRP) and norepinephrine (NE) may interact in acute myocardial ischemia, protecting cardiomyocytes but the underlying mechanism is unclear. Here we investigated the correlation of the anti-apoptotic effect of CGRP with the change of Bcl-2/Bax. Cultured cardiomyocytes were divided into four groups: (1) control group (no treatment with any test agent), (2) NE group (treated with 10−5 mol/L of NE), (3) CGRP + NE group (treated with 10−8 mol/L of CGRP and NE at 10−5 mol/L) and (4) CGRP8-37 + CGRP + NE group (treated with 10−7 mol/L of CGRP8-37, a specific antagonist of CGRP receptor, CGRP at 10−8 mol/L and NE at 10−5 mol/L). Apoptosis ratio was analyzed by flow cytometry. Bcl-2 and Bax and the coding mRNA were examined. It was found that the apoptosis ratio in NE group (29.4 ± 1.8%) was significantly greater (P < 0.05) than that of the control group (10.1 ± 1.7%). The effect of NE was attenuated by CGRP (18.7 ± 2.1%), which was reversed by CGRP8-37 (24.9 ± 2.9%). NE treatment resulted in reductions in the ratio of Bcl-2/Bax (by 33%) and their mRNA (by 53%). CGRP restored the level of Bcl-2/Bax, which was abolished by CGRP8-37. Current study suggests that norepinephrine inhibits synthesis of Bcl-2 and increases Bax and apoptosis of cardiomyocytes. CGRP restores the ratio of Bcl-2/Bax and attenuates the apoptosis induced by NE, via specific CGRP receptor.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 549, 9 August 2013, Pages 130–134
نویسندگان
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