N G-nitro-l-arginine methyl ester-induced norepinephrine release from cardiac sympathetic nerve endings in anesthetized cats

N G-nitro-l-arginine methyl ester-induced norepinephrine release from cardiac sympathetic nerve endings in anesthetized cats
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N G-硝基-L-精氨酸甲酯诱导麻醉猫心脏交感神经末梢释放去甲肾上腺素

DOI:
10.1016/j.neulet.2003.09.048
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发表时间:
2003
影响因子:
2.5
通讯作者:
K. Sunagawa
K. Sunagawa
中科院分区:
医学4区
文献类型:
--
作者:
Y. Takauchi;T. Yamazaki;T. Akiyama;K. Sunagawa

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使用麻醉猫的心脏透析技术,我们检查了 NG-硝基-L-精氨酸甲酯(L-NAME,一种一氧化氮 (NO) 合酶抑制剂,100 mM)对交感神经调节的影响。局部施用 l-NAME 会导致透析液去甲肾上腺素 (NE) 水平增加,而添加 ω-芋螺毒素 GVIA 对此没有影响。添加 l-NAME 可抑制高钾(高 K+)引起的透析液 NE 水平升高。为了确认 NO 参与 NE 释放作用,我们比较了施用 l-NAME 或 d-NAME 期间的透析液 NE 水平,结果发现它们之间没有显着差异。 l-NAME 诱导自发的非胞吐 NE 释放,但通过高 K+ 抑制胞吐 NE 释放。 l-NAME可以与NE传输和NE释放机制相互作用。然而,NO 对 l-NAME 释放的 NE 量贡献不大。
Using the cardiac dialysis technique in the anesthetized cat, we examined the effects of NG-nitro-l-arginine methyl ester (l-NAME, a nitric oxide (NO) synthase inhibitor, 100 mM) on sympathetic modulation. Local administration of l-NAME induced increases in dialysate norepinephrine (NE) levels, which were not affected by the addition of ω-conotoxinGVIA. High-potassium (high K+)-evoked increases in dialysate NE levels were suppressed by addition of l-NAME. To confirm the involvement of NO in the NE releasing action, we compared dialysate NE levels during the administration of l-NAME or d-NAME and no significant differences between them. l-NAME induces spontaneous non-exocytotic NE release but suppresses exocytotic NE release by high K+. l-NAME may interact with both NE transport and NE release mechanisms. However, NO may contribute little to the amounts of NE released by l-NAME.
DOI: 10.1161/01.res.77.4.841
发表时间: 1995-10-01
影响因子: 20.1
作者:
SCHWARZ, P;DIEM, R;FORSTERMANN, U
通讯作者: FORSTERMANN, U
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