相关实验视频
Updated: Jan 10, 2026

05:57
Fat Preference: A Novel Model of Eating Behavior in Rats
Published on: June 27, 2014
13.7K
偏差的组胺信号选择性地进入脂肪偏好门
Yanrong Zheng1, Jie Liao2, Zhuowen Fang3
1Zhejiang Key Laboratory of Neuropsychopharmacology, School of Pharmaceutical Sciences, First Affiliated Hospital of Zhejiang Chinese Medical University, Zhejiang Chinese Medical University, Hangzhou 310053, Zhejiang, China.
Neuron
|November 27, 2025
概括
科学家们发现了一种特定的大脑电路在副腹腔丘脑 (PVT),控制高脂肪饮食 (HFD) 的偏好. 在PVT神经元上的组胺H3受体 (H3R) 是调节脂肪消耗的关键.
科学领域:
- 神经科学是一个神经科学.
- 饮食科学 饮食科学
- 分子生物学分子生物学
背景情况:
- 饮食脂肪在健康饮食中存在挑战,因为它具有可口性和能量密度.
- 了解调节脂肪偏好的分子机制对于饮食管理至关重要.
研究的目的:
- 确定特定的神经元群体和参与调节高脂肪饮食 (HFD) 偏好的分子标.
- 为了研究下垂体丘脑 (PVT) 在控制脂肪消耗方面的作用.
主要方法:
- 神经元活动依赖的标签,以区分对饮食反应的神经元.
- 翻译核糖体亲和力净化测序和in situ杂交以识别分子标记物.
- 在PVT中操纵组胺H3受体 (H3R) 表达和组胺作用途径.
- 电生理学分析以评估神经元活动和信号通路.
主要成果:
- 在PVT中观察到HFD和高糖饮食 (HSD) 敏感的神经元群体之间存在明显的分离.
- 鉴定了组胺H3受体 (H3R) 作为对HFD响应的PVT神经元 (PVT HFD) 的标记物.
- 在PVT中调节H3R特别改变了HFD消耗,表明其在调节脂肪摄入中的作用.
- 通过基因组胺介导的H3R激活通过G12/13信号增强了PVT HFD神经元的刺激性.
结论:
- 在控制脂肪偏好方面,PVT起着重要作用.
- 在PVT中的H3R-G12/13信号轴代表了控制脂肪消耗的新目标.
相关概念视频
Regulation of Food Intake
2.2K
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...
2.2K
GPCRs Regulate Adenylyl Cylase Activity
7.2K
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...
7.2K
Hormonal Regulation
47.7K
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.
47.7K
Sympathetic Signaling
2.1K
Sympathetic signaling, a vital part of the autonomic nervous system, plays a crucial role in mobilizing the body's resources in response to stress or emergencies. It involves the transmission of nerve impulses from sympathetic preganglionic fibers to postganglionic fibers. This results in the release of specific neurotransmitters and activation of adrenergic receptors.
Sympathetic preganglionic fibers release the neurotransmitter acetylcholine (ACh) onto the ganglionic neurons in the...
Sympathetic preganglionic fibers release the neurotransmitter acetylcholine (ACh) onto the ganglionic neurons in the...
2.1K
Adrenergic Receptors: β Subtype
3.4K
β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
β1-adrenoceptors: β1-adrenoceptors...
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
β1-adrenoceptors: β1-adrenoceptors...
3.4K

