脑下马拉酸脱酶2通过催产素介导的热生成调节全身葡萄糖代谢
Ting Yao1, Guoming Wu2, Yu Zeng2
1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China; Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China.
腹腔外科手术是什么意思
科学领域:
- 代谢性疾病研究研究.
- 神经内分泌学神经内分泌学
- 肥胖和糖尿病的研究研究.
背景情况:
- 腹腔外科手术有效地治疗肥胖和2型糖尿病 (T2D) 的高血糖症.
- 这些代谢改善的核心机制在很大程度上是未知的.
- 确定T2D的新型治疗点是一个至关重要的未满足的需求.
研究的目的:
- 阐明腹部手术改善葡萄糖平衡的核心机制.
- 在中枢神经系统内识别新型分子点,以调节代谢.
- 研究酸脱酶2 (MDH2) 在中央血糖控制中的作用.
主要方法:
- 在老鼠中进行脑脊液蛋白质分析.
- 使用选择性抗剂 (LW6) 阻断中心MDH2的药理学阻断.
- 催产素神经元的化学遗传操纵在下丘脑侧心室核 (PVN).
- 评估葡萄糖平衡,交感神经系统 (SNS) 活动和棕色脂肪组织 (BAT) 热生成.
- 在小鼠中PVN特定的Mdh2基因缺失.
- 在T2D的小鼠模型中评估LW6.
主要成果:
- 降低的中心MDH2水平与手术诱导的正常血糖相关.
- 通过LW6减弱的高血糖抑制中心MDH2,独立于酶活性.
- 抑制MDH2激活了PVN催产素神经元,增强了SNS向BAT的外流.
- PVN催产素神经元的激活模仿了LW6降血糖的作用.
- 沉默催产素神经元或阻断催产素受体取消了LW6的好处.
- 特定于PVN的Mdh2删除损害了LW6降糖功效.
- 在T2D小鼠模型中,LW6表现出持续的降血糖效应.
结论:
- 酸脱酶2 (MDH2) 是葡萄糖代谢的关键中央调节剂.
- 中央MDH2的抑制促进通过氧化素-SNS-BAT轴的葡萄糖处置.
- MDH2代表了一种新的治疗点,用于管理T2D的高血糖症.
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