光生物调节通过内皮氧化合成酶抑制缺血诱导的大脑内皮衰老
Yu Feng1,2, Zhihai Huang1,2, Xiaohui Ma2
1Institute for Cerebrovascular and Neuroregeneration Research, Shreveport, LA 71103, USA.
Antioxidants (Basel, Switzerland)
|June 27, 2024
概括
光生物调节疗法 (PBMT) 通过激活内皮氧化合成酶 (eNOS),减少血管衰老和改善中风后内皮细胞健康来增强脑血管功能.
科学领域:
- 神经科学是一个神经科学.
- 生物医学工程 生物医学工程
- 血管生物学 血管生物学
背景情况:
- 光生物调节疗法 (PBMT) 对脑血管疾病显示出有前途.
- 对于PBMT对血管的益处的确切机制尚不清楚.
- 内皮氧化合成酶 (eNOS) 对于缺血后的血管功能至关重要.
研究的目的:
- 研究eNOS在PBMT对脑血管功能影响中的作用.
- 确定PBMT是否影响内皮细胞衰老.
- 探索PBMT对缺血性脑血管疾病的治疗潜力.
主要方法:
- 使用了老鼠光血栓性 (PT) 卒中和体外氧气-葡萄糖剥夺 (OGD) 模型.
- 给药PBMT (808nm) 时间为7天.
- 评估了血管透性,内皮衰老标志物 (衰老绿色,p21),内静止素和-eNOS (Ser1177).
- 评估了带有和没有氧化合成酶 (NOS) 抑制剂的PBMT效应.
主要成果:
- 在PT中风模型中,PBMT显著降低了血管透率.
- PBMT降低了内皮衰老标志物和内静止素,同时增加了心脏梗塞周围区域的-eNOS.
- 在体外,PBMT逆转了OGD诱导的p21,内静止素和DNA损伤 (γH2AX) 的增加.
- 一种NOS抑制剂减弱了PBMT的有益作用.
结论:
- eNOS在PBMT对脑血管衰老和内皮功能障碍的保护作用中发挥着关键作用.
- 在脑血管疾病中,PBMT显示出作为改善内皮功能治疗策略的潜力.
- 这些发现阐明了PBMT在缺血性中风恢复中的新机制.
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