一个激发性副腹腔核到AgRP神经元电路,驱动饥饿感
Michael J Krashes1, Bhavik P Shah1, Joseph C Madara2
11] Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA [2] Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA (M.J.K.); National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224, USA (M.J.K.); Cardiovascular and Metabolic Diseases, Pfizer, 610 Main Street, Cambridge, Massachusetts 02139, USA (B.P.S.); Division of Pediatric Endocrinology, Departments of Pediatrics, University of Michigan, Ann Arbor, Michigan 48105, USA (D.P.O.); Cardiovascular and Metabolic Diseases, Novartis Institutes for BioMedical Research, 100 Technology Square, Cambridge, Massachusetts 02139, USA (L.V.). [3].
研究人员发现了控制饥饿的新大脑路径. 下丘脑中的特定神经元,表达甲状腺释放激素 (TRH) 和垂体腺酸环酶激活多 (PACAP),激活阿古蒂相关 (AgRP) 神经元来驱动养行为.
科学领域:
- 神经科学是一个神经科学.
- 神经内分泌学神经内分泌学
- 调节食欲 调节食欲是什么意思
背景情况:
- 饥饿是一种由特定的神经回路调节的重要生存机制.
- 弧形核 (ARC) 中的Agouti相关 (AgRP) 表达神经元是饥饿和养的关键调节者.
- 激发AgRP神经元的激发输入的来源,对于饥饿激活至关重要,以前未被确定.
研究的目的:
- 确定为AgRP神经元提供刺激输入的特定神经元群.
- 研究这些新发现的输入对调节饥饿和养行为的作用.
主要方法:
- 在小鼠中利用了支持Cre-重组酶的细胞特异性神经元映射技术.
- 使用化学遗传学来刺激和抑制特定的神经元群体.
- 监测养行为,以应对神经元操纵在两个和热量不足的状态.
主要成果:
- 鉴定出新的激发性输入到AgRP神经元,起源于下丘脑副腹腔核.
- 这些输入特别来自表达甲状腺释放激素 (TRH) 和垂体腺酸环酶激活聚 (PACAP) 的神经元子集.
- 这些TRH/PACAP神经元的化学遗传激活在足的小鼠中诱导了强烈的食,而抑制则减少了卡路里缺乏期间的食.
结论:
- 发现,在下丘脑前腔室核中的TRH和PACAP神经元为AgRP神经元提供了关键的刺激驱动.
- 这些发现揭示了一条以前未知的神经通路,该通路对于触发和调节饥饿至关重要.
- 促进了对控制食欲和激励状态的复杂神经回路的理解.
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