相关实验视频
Updated: Jul 5, 2025

04:48
Control of Eating Behavior Using a Novel Feedback System
Published on: May 8, 2018
11.0K
POMC神经元 BBSome 体重的调节是独立于其功能
Deng-Fu Guo1,2, Paul A Williams1, Connor Laule1
1Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
Function (Oxford, England)
|January 15, 2024
概括
巴德特-比德尔综合征 (BBS) 蛋白BBS1,但不是BBS3,通过影响神经元功能,调节能量和葡萄糖平衡. 与BBS3不同,BBS1影响线粒体动力学和受体定位,而BBS3则影响线粒体动力学和受体定位.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 神经内分泌学神经内分泌学
- 细胞生物学 细胞生物学
背景情况:
- 包括BBS1和BBS3在内的BBSome复合体对于乳毛功能和调节参与代谢控制的细胞膜受体至关重要.
- 虽然BBSome在乳毛贩运中的作用已知,但其在神经元内的代谢调节中的特定功能仍然不太了解.
研究的目的:
- 调查BBS1和BBS3在POMC神经元中在调节能量和葡萄糖恒温中的不同作用.
- 阐明BBS1和BBS3影响POMC神经元中代谢过程的分子机制.
主要方法:
- 在小鼠的POMC神经元中,Bbs1和Bbs3的诱导性基因删除.
- 评估体重,脂肪量,耐葡萄糖和胰岛素敏感性.
- 对胺5-HT2C受体 (5-HT2C R) 和神经Y2受体 (NPY2R) 局部化的分析.
- 评估线粒体动力学和动胺类蛋白1 (DRP1) 活性.
主要成果:
- 在POMC神经元中选择性删除Bbs1导致体重增加,脂肪量增加,葡萄糖不耐受和胰岛素不敏感.
- 在POMC神经元中的Bbs3缺失没有显著影响体重或脂肪,只有轻微的葡萄糖处理障碍.
- 缺乏BBS1改变了5-HT2C R的血局部和NPY2R的纤维运输,破坏了线粒体动力学,并降低了DRP1的活动.
- BBS3 缺陷主要影响NPY2R的纤维运输,而不会影响5-HT2C R局部或线粒体动力学.
- 在BBS1缺乏细胞中恢复DRP1活动,使线粒体动力学和受体局部化正常化.
结论:
- BBS1,但不是BBS3,在通过POMC神经元调节能量和葡萄糖平衡中起着至关重要的作用.
- 在POMC神经元中,BBS1的代谢调节功能至少在一定程度上独立于其正规的状细胞贩运作用.
- 线粒体动力学和DRP1活动是BBS1在POMC神经元内的代谢调节中的关键下游影响者.
相关概念视频
Regulation of Food Intake
233
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
233
Brainstem: Control Centers of Medulla
1.6K
The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
1.6K
Hormonal Regulation
43.5K
Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
43.5K
Diencephalon: Hypothalamus and Coordination
1.5K
The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
1.5K
Neural Regulation
39.4K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.4K
GPCRs Regulate Adenylyl Cylase Activity
5.6K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.6K

