通过AAV5介导的胆脉中胰岛素表达的操纵具有长期的代谢和行为后果
Caio Henrique Mazucanti1, Vernon Kennedy1, Hasitha U Premathilake1
1Laboratory of Clinical Investigation, National Institute on Aging, Intramural Research Program, Baltimore, MD 21224, USA.
Cell reports
|July 29, 2023
概括
冠状动脉产生的胰岛素,影响食欲和焦虑. 这种大脑胰岛素会影响下丘脑神经元,突出其在中枢神经系统功能中的作用.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
背景情况:
- 胸膜 (CP) 提供了对大脑发育和功能至关重要的营养因子.
- 胰岛素是在CP的上皮细胞 (EChP) 内产生,分泌由Htr2c信号调节.
研究的目的:
- 研究CP衍生的胰岛素在调节中枢神经系统功能中的作用.
- 确定调节CP中的胰岛素表达对养行为和焦虑的影响.
主要方法:
- 腺相关病毒血清型5 (AAV5) 用于脑内静脉内注射,以调节EChP胰岛素表达.
- 分析了食物摄入量,焦虑行为和下丘脑的转录组变化.
- 研究了CP中的Gq信号的激活以及随后的神经元信号的激活.
主要成果:
- 在CP中过度表达胰岛素减少了食物摄入量和焦虑行为.
- 在CP中抑制胰岛素增加了食物摄入量.
- 转录组分析揭示了下丘脑突触相关过程中的变化.
- 激活Gq信号诱导了弧形核神经元中的Akt酸化,表明直接的胰岛素作用.
结论:
- 冠状动脉是中枢神经系统中胰岛素的重要来源.
- CP衍生的胰岛素直接影响下丘脑神经元,影响养行为和焦虑.
- 这些发现强调了在脑胰岛素信号研究中考虑CP衍生胰岛素的重要性.
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