Cysteine-Rich Whey Protein Isolate (CR-WPI) Ameliorates Erectile Dysfunction by Diminishing Oxidative Stress via DDAH/ADMA/NOS Pathway.

Cysteine-Rich Whey Protein Isolate (CR-WPI) Ameliorates Erectile Dysfunction by Diminishing Oxidative Stress via DDAH/ADMA/NOS Pathway.
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富含半胱氨酸的乳清分离蛋白 (CR-WPI) 通过 DDAH/ADMA/NOS 途径减少氧化应激,从而改善勃起功能障碍

DOI:
10.1155/2022/8151917
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发表时间:
2022
影响因子:
--
通讯作者:
Liu S
Liu S
中科院分区:
生物学2区
文献类型:
--
作者:
Li K;Zhu A;Gutman J;Fu Q;Liu S

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氧化应激(OS)诱导的一氧化氮合酶(NOS)依赖性内皮功能障碍在糖尿病相关勃起功能障碍(DMED)的发病机制和进展中起着关键作用。富含半胱氨酸的乳清蛋白分离物(CR-WPI)是一种广泛使用的蛋白质补充剂,并已被证实通过增加细胞抗氧化剂谷胱甘肽(GSH)来减少活性氧(ROS)。然而,目前尚不清楚CR-WPI是否在DMED中具有治疗效果。在这里,我们提供了糖尿病大鼠与CR-WPI,以确定其对DMED的影响和潜在的机制。结果表明,CR-WPI补充增加GSH的生物合成和减少ROS含量,同时上调二甲基精氨酸二甲氨基水解酶(DDAH)/不对称二甲基精氨酸(ADMA)/一氧化氮合酶(NOS)代谢途径。海绵体内压(ICP)的评价也显示了CR-WPI治疗大鼠阴茎勃起功能的改善。体外细胞培养结果显示,谷胱甘肽预处理可通过降低Caspase 9和Caspase 3的表达,保护阴茎海绵体平滑肌细胞(CCSMC)免受H2 O2诱导的凋亡。这些结果很好地预示了饮食CR-WPI补充剂用于治疗糖尿病勃起功能障碍的潜在治疗应用。
Nitric oxide synthase- (NOS-) dependent endothelial dysfunction induced by oxidative stress (OS) is assumed to play a pivotal role in the pathogenesis and progression of diabetes mellitus-related erectile dysfunction (DMED). Cysteine-rich whey protein isolate (CR-WPI) is a widely used protein supplement and has been confirmed to reduce reactive oxygen species (ROS) by increasing cellular antioxidant glutathione (GSH). However, it is currently unknown whether CR-WPI elicits therapeutic effects in DMED. Here, we provide diabetic rats with CR-WPI to determine its effect on DMED and the underlying mechanisms. The results suggest that CR-WPI supplementation increased GSH biosynthesis and reduced ROS content and simultaneously upregulated the dimethylarginine dimethylaminohydrolase (DDAH)/asymmetrical dimethylarginine (ADMA)/nitric oxide synthase (NOS) metabolic pathway. Evaluation of intracavernous pressure (ICP) also showed an improvement of penile erectile function in CR-WPI-treated rats. The results of the vitro cell culture showed that glutathione pretreatment protected corpus cavernosum smooth muscle cells (CCSMC) from H2O2-induced apoptosis by decreasing Caspase 9 and Caspase 3 expressions. These results augur well for the potential therapeutic application of dietary CR-WPI supplementation for treating diabetic erectile dysfunction.
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