申请人:——
公开号:US20020062020A1
公开(公告)日:2002-05-23
A method for producing a S-nitrosylated species is provided. The method comprises: (a) providing a deoxygenated, alkaline aqueous solution comprising a thiol and a nitrite-bearing species; (b) acidifying the solution by adding acid to the solution while concurrently mixing the solution (e.g., by vigorously stirring the solution) to produce the S-nitrosylated species; and (c) isolating the S-nitrosylated species. The nitrite-bearing species can be, for example, an inorganic nitrite, such as an alkali metal nitrite, or an organic nitrite, such as an alkyl nitrite (e.g., ethyl nitrite, amyl nitrite, isobutyl nitrite or t-butyl nitrite). The thiol is preferably a thiol-containing polysaccharide, a thiol-containing lipoprotein, a thiol-containing amino acid or a thiol-containing protein, and more preferably a thiol-containing polysaccharide such as thiolated cyclodextrin. In many preferred embodiments, the S-nitrosylated species is insoluble in the acidified solution, precipitating upon formation. The S-nitrosylated species can be isolated, for example, by a process in which the precipitate is removed from the solution (e.g., by centrifugation) and the aqueous solvent remaining in the precipitate is sublimated (e.g., by freezing the precipitate and subjecting it to a vacuum). The isolated S-nitrosylated product is preferably protected from heat, light, moisture and oxygen.
本发明提供了一种生产 S-亚硝基化物的方法。该方法包括:(a) 提供包含
硫醇和
亚硝酸盐的脱氧碱性
水溶液;(b) 通过向溶液中添加酸来酸化溶液,同时搅拌溶液(例如,剧烈搅拌溶液)以产生 S-亚硝基化物;以及 (c) 分离 S-亚硝基化物。例如,含
亚硝酸盐的物质可以是无机
亚硝酸盐,如碱
金属
亚硝酸盐,或有机
亚硝酸盐,如烷基
亚硝酸盐(如
亚硝酸乙酯、亚
硝酸戊酯、
亚硝酸异丁酯或
亚硝酸叔丁酯)。
硫醇优选为含
硫醇的
多糖、含
硫醇的脂蛋白、含
硫醇的
氨基酸或含
硫醇的蛋白质,更优选为含
硫醇的
多糖,如
硫醇化的
环糊精。在许多优选的实施方案中,S-亚硝基化物不溶于酸化溶液,在形成后沉淀。S 亚硝基化物可通过以下方法分离出来:例如,将沉淀从溶液中去除(如通过离心),然后将沉淀中残留的
水溶剂升华(如通过冷冻沉淀并将其置于真空中)。分离出的 S-亚硝基化产物最好能避开热、光、湿气和
氧气。