Control of NO Concentration in Solutions of Nitrosothiol Compounds by Light

Control of NO Concentration in Solutions of Nitrosothiol Compounds by Light
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光控制亚硝基硫醇化合物溶液中 NO 浓度

DOI:
10.1111/j.1751-1097.1998.tb05200.x
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发表时间:
1998
影响因子:
3.3
通讯作者:
D. Godwin
D. Godwin
中科院分区:
生物学3区
文献类型:
--
作者:
V. Zhelyaskov;K. Gee;D. Godwin

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我们研究了两种 S-亚硝基硫醇、S-亚硝基谷胱甘肽 (GSNO) 和 S-亚硝基-N-乙酰青霉胺 (SNAP) 在水或丙醇溶液中的热分解和光分解。通过改变 pH 值、硝化血管舒张剂的浓度和光源的强度,可以在封闭体积中实现“浓度钳”(作为时间函数的相对恒定的 NO 浓度)。根据条件的不同,光会刺激 NO 释放或急剧降低测试溶液中的 NO 浓度。 GSNO 溶液吸收光谱的变化被监测为曝光量的函数。 S-亚硝基硫醇的光解反应和 NO 的进一步氧化所产生的超氧化物是光抑制 NO 浓度的最可能的机制。
We studied the thermal and photolytic decomposition of two S‐nitrosothiols, S‐nitrosoglutathione (GSNO) and S‐nitroso‐N‐acetylpenicillamine (SNAP), in water or propanol solutions. A "concentration clamp" (relatively constant concentration of NO as a function of time) could be implemented in a closed volume by varying the pH, concentration of nitrovasodilator and intensity of the light source. Depending on the conditions, the light either stimulated NO release or sharply decreased NO concentration in the test solutions. Changes in the absorption spectra of GSNO solutions were monitored as a function of light exposure. Generation of superoxide as a product of a photolytic decomposition reaction of S‐nitrosothiols and further oxidation of NO is the most likely mechanism for light suppression of NO concentration.
DOI: 10.1126/science.7690156
发表时间: 1993-09-10
期刊: SCIENCE
影响因子: 56.9
作者:
KARUPIAH, G;XIE, QW;MACMICKING, JD
通讯作者: MACMICKING, JD
DOI: 10.1126/science.1378650
发表时间: 1992-07-17
期刊: SCIENCE
影响因子: 56.9
作者:
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通讯作者: SNYDER, SH
DOI: 10.1073/pnas.88.24.11285
发表时间: 1991-12-01
影响因子: 11.1
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通讯作者: ARANCIO, O