Biosci Rep:麦角钙化固醇可改善轻度尿毒症大鼠内皮血管舒张和血管收缩功能

2020-02-27 不详 网络

在患有心血管疾病(CVD)和慢性肾脏病(CKD)的患者中普遍存在内皮功能障碍和维生素D缺乏症。两者都是CKD患者心血管事件的危险因素。当血管内皮更适合这种治疗时,尚无研究探究维生素D营养形式对CKD早期阶段内皮功能的影响。本研究中,我们探究了麦角钙化固醇在轻度尿毒症的临床前模型中的作用。雄性Wistar大鼠进行了5/6次肾切除术或假手术。手术最后阶段结束后的四个星期,这两组被随机分配到安慰剂组,或

在患有心血管疾病(CVD)和慢性肾脏病(CKD)的患者中普遍存在内皮功能障碍和维生素D缺乏症。两者都是CKD患者心血管事件的危险因素。当血管内皮更适合这种治疗时,尚无研究探究维生素D营养形式对CKD早期阶段内皮功能的影响。本研究中,我们探究了麦角钙化固醇在轻度尿毒症的临床前模型中的作用。

雄性Wistar大鼠进行了5/6次肾切除术或假手术。手术最后阶段结束后的四个星期,这两组被随机分配到安慰剂组,或在处死前第7天和第2天口服1000 IU麦角钙化甾醇。在主动脉环中确定了对乙酰胆碱,精胺NONOate和去氧肾上腺素的血管反应。所有组均测量血压,钙,磷酸盐和甲状旁腺激素。

麦角钙化固醇显著改善了对乙酰胆碱的内皮依赖性反应,并克服了尿毒症动物中对苯肾上腺素的收缩反应的减弱。麦角钙化固醇可改善尿毒症动物对氯化钾的收缩反应,但不能改善假动物。所有影响均独立于钙,磷酸盐,甲状旁腺激素和收缩压的变化而发生。精氨酸NONOate的内皮依赖性舒张没有差异。

总之,在轻度尿毒症模型中,麦角钙化固醇可改善血压舒张剂和血管收缩剂的张力,而与血压和骨矿物质参数无关,表明麦角钙化醇对内皮有直接作用。

原始出处:

Gavin Dreyer, Julius Kieswich, et al., Ergocalciferol improves endothelial vasodilatory and vasoconstrictor function in an in vivo model of mild uraemia. Biosci Rep. 2019 Dec 20; 39(12): BSR20190711. doi: 10.1042/BSR20190711

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    2020-11-20 sunylz
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    2020-02-29 tcm99hq