核受体Nur77由6-mercaptopurine的激活可以防止Neointima的形成
Nuno M M Pires1, Thijs W H Pols, Margreet R de Vries
1Gaubius Laboratory, TNO-Quality of Life, Leiden, The Netherlands.
Circulation
|January 24, 2007
概括
6 - 默卡普图 (6-MP) 通过激活核受体Nur77.7来抑制血管光滑肌肉细胞的增殖和复原. 这种激活减少了DNA合成和neointima形成,提供了潜在的治疗本体静止.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 药理学 药理学 是一个学科.
背景情况:
- 静脉复杂症是穿皮冠状动脉干预的并发症,涉及过度的血管光滑肌肉 (SMC) 细胞增殖.
- 核受体Nur77已被确定为对SMC丰富的病变形成的保护因素.
- 已知6 - 墨卡普图 (6-MP) 可以增强Nur77的活性.
研究的目的:
- 通过激活Nur77.7来研究6-MP通过激活Nur77.7来抑制neointima形成的假设.
- 阐明6-MP与Nur77活动相关的分子机制,从而影响SMC增殖和neointima形成.
主要方法:
- 评估了6-MP对Nur77活性和培养SMC中的DNA合成的影响,使用小干扰RNA进行Nur77敲击.
- 利用一种由袖口诱导的新密性形成的小鼠模型来研究6-MP的体内效应.
- 在野生型和Nur77-转基因小鼠中通过药物释放袖口局部施用6-MP.
主要成果:
- 6-MP在培养的SMC中增加了Nur77的活性,减少了DNA合成,这种效果被Nur77的敲击部分逆转.
- 在体内,局部的6-MP输送通过减少增殖细胞核抗原和增加p27 (Kip1) 水平,显著抑制了野生类型小鼠的新密度形成.
- 在过度表达Nur77的小鼠中观察到加强了neointima形成的抑制,而在具有主导负Nur77的小鼠中,6-MP没有影响,这证实了Nur77的作用.
结论:
- 6-MP通过增强Nur77的活性来保护SMC的扩散和新密的形成.
- 激活Nur77核受体代表了治疗静脉静脉复缩的有前途的治疗策略.
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