激活NMDA类型的谷氨酸受体促进血管重塑和肺动脉高血压
Sébastien J Dumas1,2, Gilles Bru-Mercier1,2, Audrey Courboulin1,2
1INSERM UMR-S 999, Hôpital Marie Lannelongue, Le Plessis-Robinson, France (S.J.D., G.B.-M., A.C., M.Q., C.R.-M, F.A., M.K.N., B.R., E.G., M.-C.V., M.V., N.R., P.D., E.F., F.P., M.H., S.C.-K.).
肺动脉高血压 (PAH) 涉及由代谢变化驱动的血管重塑. 这项研究揭示了谷氨酸-N-甲基-D-酸盐受体 (NMDAR) 轴在PAH中失调,这表明NMDARs是抗重塑治疗的潜在治疗标.
科学领域:
- 心血管生物学 心血管生物学
- 肺高血压研究 肺高血压研究
- 神经药理学神经药理学
背景情况:
- 肺动脉高血压 (PAH) 的特点是血管重塑,导致心力衰竭和死亡.
- 代谢重编程,特别是增加的谷氨酸溶解,可能会推动PAH的血管重塑.
- 在血管细胞和PAH中,N-甲基-D-酸盐受体 (NMDAR) 是神经元中的谷氨酸受体,其作用尚不清楚.
研究的目的:
- 在患有PAH的患者的肺动脉中研究谷氨酸-NMDAR轴.
- 确定血管NMDARs在肺高血压病变的作用.
- 探索NMDARs作为PAH抗重塑治疗的潜在治疗点.
主要方法:
- 评估了人类PAH肺动脉中谷氨酸-NMDAR轴的状态,使用质谱成像,西部涂抹和免疫组织化学.
- 在培养的肺血管细胞中测量了谷氨酸释放和NMDAR酸化.
- 评估了NMDAR阻塞对人类肺动脉平滑肌肉细胞增殖和肺高血压的小鼠/大鼠模型的影响.
主要成果:
- 在人类的PAH肺动脉中观察到谷氨酸积累,NMDAR上调和增加的NMDAR活性 (GluN1酸化).
- 确定了谷氨酸-NMDAR轴和PAH相关通路 (内素,PDGF) 之间的交叉.
- 滑动肌肉NMDAR缺乏在小鼠减弱低氧诱导的血管改造;NMDAR阻塞改善了小鼠PAH模型中的血管改造.
结论:
- 在患有PAH的患者的肺动脉中,谷氨酸-NMDAR轴的调节失调.
- 血管NMDAR在肺高血压和血管改造的发展中发挥着重要作用.
- 血管NMDARs在PAH中代表了新型抗重塑疗法的有希望的目标.
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