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Cholesterol Efflux Assay
Published on: March 6, 2012
在人类血小板中,胆固醇硫转移酶 (SULT2B1b) 的表达
Hidekatsu Yanai1, Norman B Javitt, Yuko Higashi
1Section on Steroid Regulation, Endocrinology, and Reproduction Research Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Md 20892-4510, USA.
Circulation
|December 17, 2003
概括
对于血液循环至关重要的硫酸胆固醇在人体血小板中受到SULT2B1b.b酶的调节. 高密度脂蛋白是一种高密度脂蛋白.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 血液学 血液学 血液学
背景情况:
- 胆固醇硫酸盐是人类循环中的一个关键的硫酸固醇.
- 它调节了血液凝固,纤维素分解和血小板聚合.
- 胆固醇硫酸盐存在于人类血小板中.
研究的目的:
- 为了确定负责人类血小板中的胆固醇硫化酶.
- 研究血脂蛋白对这种酶的表达和活性的影响.
- 了解血小板中胆固醇硫酸盐生产的调节.
主要方法:
- 使用逆转录-聚合酶链反应 (RT-PCR) 检测SULT2B1b mRNA.
- 使用实时PCR对SULT2B1bmRNA水平的量化.
- 评估SULT2B1b蛋白水平和酶活性.
- 评估脂蛋白对mRNA稳定性和酶活性的影响 (HDL,LDL).
主要成果:
- 人类血小板仅表达SULT2B1b,即胆固醇硫转移酶.
- 在37°C时,SULT2B1b mRNA水平显著下降,但由HDL稳定.
- 高密度胆固醇的稳定作用是由其阿波利波蛋白AI (apoA-I) 组成部分介导的.
- 血小板SULT2B1b的mRNA和蛋白质水平与酶活性和胆固醇硫酸盐的产生直接相关.
结论:
- 人类血小板表达生理学胆固醇硫转移酶,SULT2B1b.
- 血小板中SULT2B1bmRNA和蛋白质的稳定性是由HDL的apoA-I.I.调节的.
- 这一发现突出了血小板中胆固醇硫酸盐生产的新型调节机制.
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