関連する実験動画
Updated: Jun 17, 2025

04:48
Control of Eating Behavior Using a Novel Feedback System
Published on: May 8, 2018
10.9K
PTERは,栄養と肥満を調節するN-アセチルタウリンヒドローラーゼである
Wei Wei1,2, Xuchao Lyu1,2,3, Andrew L Markhard1,2
1Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA.
Nature
|August 7, 2024
まとめ
研究者らは,N- アセチルタウリンを代謝する酵素として,フォスフォートリエステラゼ関連 (PTER) を特定した. この発見は,N-アセチルタウリンとPTERが体重とエネルギーバランスを調節する新たな役割を明らかにしています.
科学分野:
- 生物化学
- メタボリズム
- 内分泌学
背景:
- タウリンは複雑な内生代謝を持つ重要なアミノ酸です.
- N- アセチルタウリンは既知の代謝産物ですが,その代謝酵素と機能は以前は知られていませんでした.
- タウリンの代謝を理解することは,代謝の健康にとって極めて重要です.
研究 の 目的:
- N-アセチルタウリンの水解を起こす酵素を特定する.
- N-アセチルタウリンの生理学的役割とその代謝経路を解明する.
- N-アセチルタウリンのエネルギーバランスと体重調節への関与を調査する.
主な方法:
- リコンビナント・フォスフォトトリエステラゼ関連 (PTER) による酵素活性測定法
- プターノックアウトマウスの生成と分析
- 食物摂取量,体重,グルコースホメオスタシスを含むマウスの代謝表型決定.
- 野生型のマウスにN-アセチルタウリンの投与
主要な成果:
- PTERは,N- アセチルタウリンをタウリンおよびアセテートに変換する生理学的N- アセチルタウリンヒドローラーゼとして特定されました.
- Pter ノックアウトマウスは,N- アセチルタウリンの水解が完全に失われ,全身のN- アセチルタウリンの濃度が上昇した.
- Pterノックアウトマウスは,食事による肥満に対する抵抗,およびグルコースホメオスタシスの改善を示した.
- N- アセチルタウリンを肥満マウスに投与すると,GFRALに依存した方法で食物の摂取量と体重が減少しました.
結論:
- PTERは二次性タウリン代謝における重要な酵素である.
- N-アセチルタウリンは,体重とエネルギーバランスの制御に重要な役割を果たします.
- この研究は肥満や代謝障害に 影響を及ぼす新しい代謝経路を発見した.
関連する概念動画
Regulation of Food Intake
208
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...
208
Hormonal Regulation
43.2K
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.
43.2K
PI3K/mTOR/AKT Signaling Pathway
3.5K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.5K
Transducer Mechanism: Enzyme-Linked Receptors
2.4K
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
2.4K
cAMP-dependent Protein Kinase Pathways
6.2K
Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
6.2K
Enzyme-linked Receptors
77.8K
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
77.8K

