食事の摂取のホルモンによるコントロール
Anthony P Coll1, I Sadaf Farooqi, Stephen O'Rahilly
1Department of Clinical Biochemistry, Cambridge Institute for Medical Research, Addenbrooke's Hospital, Cambridge CB2 2XY, United Kingdom.
Cell
|April 24, 2007
まとめ
ペプチドやステロイドのような体内のホルモンは,脳の重要な領域に作用することによって食欲を調節します. このレビューは,脂肪細胞,腸,および臓からのこれらのホルモンが食物摂取にどのように影響するかの証拠を合成しています.
科学分野:
- エンドクリノロジー エンドクリノロジー
- 神経科学は神経科学である.
- メタボリズムは
背景:
- 食欲の調節は,多数の内生シグナル伝達分子によって影響される複雑なプロセスです.
- ホルモンは,エネルギーバランスと食物の摂取を媒介する上で重要な役割を果たします.
- 主な調節部位には,下垂体,脳幹,および自律神経系が含まれています.
研究 の 目的:
- 食欲制御における循環ホルモンの役割に関する最近の科学的証拠を合成する.
- 脂肪細胞,消化器系,および臓から発生するホルモンの概要.
- これらのホルモンが食物摂取に影響を与えるメカニズムを解明する.
主な方法:
- 最近の科学出版物の文献レビュー.
- 実験的および観察的研究からの証拠の合成.
- 食欲調節に関与するホルモン経路の分析.
主要な成果:
- 循環するペプチドとステロイドは食欲の重要な調節因子である.
- 脂肪組織,消化管,および臓からのホルモンは,食物の摂取に大きく影響します.
- これらのホルモンは,脳と自律神経系の神経経路を通じて効果を発揮します.
結論:
- ホルモンシグナル伝達は,食欲の生理学的コントロールの中心にある.
- これらのホルモンの作用を理解することは,代謝障害に対処するために非常に重要です.
- これらの経路に関するさらなる研究は,食欲管理のための治療的標的を明らかにする可能性があります.
関連する概念動画
Hormonal Regulation
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.
Feedback Loops
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
Hormonal Regulation
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
Regulation of Hormone Secretion
Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction.
Humoral stimuli,...
Humoral stimuli,...
Regulation of Food Intake
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...
Hormonal Control of the Ovarian Cycle
The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...


