1,25-二基维生素D3通过调节内源性副甲状腺激素相关的分泌来增加体外血管化
1Second Department of Internal Medicine, Osaka City University Medical School, Osaka 545, Japan.
Circulation
|September 30, 1998
概括
1alpha,25-dihydroxyvitamin D3 (1,25(OH) 2D3) 通过抑制平滑肌肉细胞中的副甲状腺激素相关 (PTHrP) 来促进血管化. 这种维生素D代谢物还增加性酸酶和骨质,有助于沉积.
科学领域:
- 心血管生物学 心血管生物学
- 内分泌学 在内分泌学.
- 矿物质的新陈代谢.
背景情况:
- 血管化与骨质疏松症有关,强调了平衡的作用.
- 甲状腺激素相关 (PTHrP) 可能会影响血管化.
- 假设1alpha,25-dihydroxyvitamin D3 [1,25(OH) 2D3]会影响血管光滑肌细胞的调节.
研究的目的:
- 在实验室中研究1,25(OH) 2D3对血管化的直接作用.
- 确定PTHrP在1,25(OH) 2D3诱导的血管化中的作用.
主要方法:
- 牛血管光滑肌细胞 (BVSMCs) 用不同度的1,25(OH) 2D3.3进行了治疗.
- 测量了化,性酸酶活性和PTHrP分泌/基因表达.
- 评估了外源PTHrP对1,25(OH) 2D3处理的BVSMCs的影响.
- 分析了 osteopontin 的基因表达.
主要成果:
- 1,25(OH) 2D3剂量依赖增加了BVSMC化和性酸酶活性.
- 1,25(OH) 2D3在BVSMCs中降低了PTHrP分泌和基因表达.
- 外源PTHrP对抗了1,25(OH) 2D3.3.的促进化的作用.
- 1,25(OH) 2D3在BVSMC中增加了骨质素基因表达.
结论:
- 1,25(OH) 2D3通过抑制BVSMCs内源性PTHrP表达来刺激血管化.
- 性酸酶活性增加和骨质素表达量增加1,25(OH) 2D3有助于血管化.
- 这些发现阐明了维生素D在促进血管化的直接机制.
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