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Cholesterol Efflux Assay
Published on: March 6, 2012
通过AIBP介导的胆固醇外流来控制血管生成
Longhou Fang1, Soo-Ho Choi, Ji Sun Baek
1Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
Nature
|May 31, 2013
概括
ApoA-I结合蛋白 (AIBP) 增强了内皮细胞的胆固醇排放,调节了血管生成. 这一过程对于适当的血管形成和功能至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 血管生物学 血管生物学
背景情况:
- 胆固醇对细胞结构和功能至关重要,但过量可能导致疾病.
- ATP结合盒 (ABC) 载体促进胆固醇流向高密度脂蛋白 (HDL).
- 胆固醇流出在血管生成及其调节者的作用仍然不清楚.
研究的目的:
- 为了研究apoA-I结合蛋白 (AIBP) 在胆固醇排泄和血管生成中的作用.
- 为了确定内皮细胞中胆固醇排放的局部调节者.
主要方法:
- 研究了AIBP对胆固醇从内皮细胞流向HDL的影响.
- 评估胆固醇减少对血管内皮生长因子 (VEGF) 诱导的血管新生 in vitro 和 ex vivo 的影响.
- 使用斑马鱼模型 (缺少Aibp和Abca1/Abcg1的胚胎) 来研究体内血管生成.
主要成果:
- AIBP加速胆固醇从内皮细胞流入高密度胆固醇.
- 通过AIBP和HDL降低胆固醇,可以抑制VEGFR2信号传递和血管生成.
- 斑马鱼中的Aibp调节血管脂质秩序,并且非细胞自主控制血管生成.
- 抑制Aibp会导致血管新生失调,而过度表达Aibp会抑制血管新生.
- 缺乏Aibp和缺乏Abca1/Abcg1的胚胎中的胆固醇调节失调会影响血管生成.
结论:
- 分泌的AIBP积极调节内皮细胞的胆固醇排放.
- 有效的胆固醇流出对于适当的血管生成至关重要.
- AIBP是胆固醇平衡和血管发育的关键调节者.
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