首页> 外文期刊>The journal of sexual medicine >Functional characterization of nonadrenergic noncholinergic neurotransmitter release via endocannabinoids: an in vitro study in rabbit corpus cavernosum.
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Functional characterization of nonadrenergic noncholinergic neurotransmitter release via endocannabinoids: an in vitro study in rabbit corpus cavernosum.

机译:通过肾上腺素释放非肾上腺能非胆碱能神经递质的功能表征:兔海绵体的体外研究。

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INTRODUCTION: Corporal smooth muscle relaxation is mediated mainly but not completely by nitric oxide. Endocannabinoids modulate the various neurotransmitter systems. AIM: In the present study, a possible role of endocannabinoids on non-nitrergic nonadrenergic noncholinergic (NANC)-mediated relaxations was investigated. METHODS: In precontracted tissues, control electrical field stimulation (EFS)-induced NANC relaxation responses were obtained using varying frequencies of stimulation in the presence of L-arginine methyl ester (L-NAME), guanethidine, and atropine. To investigate the effects of cannabinoids on EFS-evoked non-nitrergic NANC relaxation responses, a similar experimental procedure was applied in the presence of cannabinoid receptor antagonists AM251 or AM630; vanilloid receptor antagonist capsazepine; or cannabinoid receptor agonists anandamide, arachidonyl-2-chloroethylamide (ACEA), or JHW015. MAIN OUTCOME MEASURES: Effects of cannabinoid receptor antagonists and agonists on EFS-evoked non-nitrergic NANC relaxation responses. RESULTS: L-NAME abolished EFS-induced relaxation responses at lower frequencies (2-4 Hz) and inhibited the relaxation responses at higher frequencies (8-32 Hz). AM251 and AM630 either together or separately inhibited, whereas anandamide, ACEA, and JHW015 enhanced non-nitrergic NANC relaxation responses. Anandamide did not alter EFS-induced non-nitrergic NANC relaxations in the presence of AM251 and AM630. Capsazepine enhanced non-nitrergic NANC relaxation responses. CONCLUSION: These results suggest that non-nitrergic NANC relaxations may be mediated partially by cannabinoid-like neuronal factors acting at both cannabinoid CB(1) and cannabinoid CB(2) receptors.
机译:简介:躯体平滑肌松弛主要由一氧化氮介导,但不完全。内源性大麻素调节各种神经递质系统。目的:在本研究中,研究了内源性大麻素对非硝化非肾上腺素能非胆碱能(NANC)介导的舒张作用的可能作用。方法:在预收缩的组织中,在存在L-精氨酸甲酯(L-NAME),胍乙啶和阿托品的情况下,使用变化的刺激频率,获得了控制电场刺激(EFS)诱导的NANC松弛反应。为了研究大麻素对EFS诱发的非硝态性NANC舒张反应的影响,在存在大麻素受体拮抗剂AM251或AM630的情况下,采用了类似的实验步骤。香草类受体拮抗剂卡塞平;或大麻素受体激动剂anandamide,arachidonyl-2-chloroethylamide(ACEA)或JHW015。主要观察指标:大麻素受体拮抗剂和激动剂对EFS诱发的非硝化NANC松弛反应的影响。结果:L-NAME消除了低频(2-4 Hz)时EFS引起的弛豫响应,而抑制了高频(8-32 Hz)时的弛豫响应。 AM251和AM630一起或分别抑制,而anandamide,ACEA和JHW015增强了非硝态性NANC松弛反应。在AM251和AM630存在下,阿南酰胺不会改变EFS诱导的非硝化NANC弛豫。辣椒素增强了非硝化NANC舒张反应。结论:这些结果表明非硝化的NANC弛豫可能部分由同时作用于大麻素CB(1)和大麻素CB(2)受体的类大麻素神经元因子介导。

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