β-ヒドロキシブチラートシャント経路は,抗肥満ケトン代謝産物を生成する
Maria Dolores Moya-Garzon1, Mengjie Wang2, Veronica L Li3
1Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA; Sarafan ChEM-H, Stanford University, Stanford, CA, USA; Wu Tsai Human Performance Alliance, Stanford University, Stanford, CA, USA.
Cell
|November 13, 2024
まとめ
科学者は,アミノ酸結合を含むベータ-ヒドロキシブチラート (BHB) の新しい代謝経路を発見しました. この経路は BHBアミノ酸と呼ばれる 抗肥満メタボリットを生成し エネルギーバランスや食生活に影響します
科学分野:
- 代謝経路
- 生物化学
- 内分泌学
背景:
- ベータ・ヒドロキシブチラート (BHB) は,確立された代謝作用を持つ主要なケトン体である.
- 既存のBHBの代謝は主にエネルギー中間物質との相互変換を含んでいます.
- BHBの新たな二次代謝経路は以前は特定されていなかった.
研究 の 目的:
- BHBの代謝経路を特定し特徴づけること
- BHBの代謝におけるCNDP2の役割を調査する.
- 新しいBHB-アミノ酸代謝物の生成と機能を調査する.
主な方法:
- マウスにおけるCNDP2の遺伝的消去
- 組織のアミノ酸BHB-イレーション活性分析
- BHBアミノ酸の濃度と,その影響の評価
- 外因的なケトンエステルサプリメントとケトンダイエットの投与.
主要な成果:
- CNDP2依存のBHBとアミノ酸の結合による新しいBHB二次代謝経路が特定されました.
- この経路は,抗肥満BHB-アミノ酸代謝産物を生成する.
- CNDP2のノックアウトマウスは,BHBの酸化が低下し,食物の摂取が増加した.
- 豊富なBHB-アミノ酸であるBHB-Pheはニューロンを活性化し 栄養を抑制します
- 経路とメタボリットはヒトで保存されます.
結論:
- 酵素アミノ酸BHB-イレーションは新しいケトンシャント経路を定義する.
- BHBアミノ酸は,エネルギーバランスを影響する生物活性代謝産物です.
- CNDP2は,この新発見された代謝経路において重要な役割を果たします.
関連する概念動画
01:02Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids
3.1K
Carboxylic acids, upon heating, undergo a decarboxylation reaction by releasing carbon dioxide gas. Monocarboxylic acids do not undergo decarboxylation easily. However, a silver salt of carboxylic acid reacts with bromine or iodine under high temperature to release carbon dioxide gas and forms halide with one less carbon. This reaction is called the Hunsdiecker reaction.
3.1K
01:28Overview of Fatty Acid Metabolism
30.2K
Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
30.2K
01:26Respiration Pathways
1
Cellular respiration is a fundamental metabolic process that enables organisms to generate energy from organic molecules. One of its central pathways is the tricarboxylic acid (TCA) cycle, also known as the Krebs cycle, which plays a crucial role in energy production and biosynthetic processes.Conversion of Pyruvate to Acetyl-CoAThe pyruvate generated from glycolysis undergoes oxidative decarboxylation by the pyruvate dehydrogenase complex, producing acetyl-CoA, one molecule of NADH, and one...
1
01:22Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
4.0K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is...
The carbonyl center is...
4.0K
03:08Hydroboration-Oxidation of Alkenes
7.9K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
7.9K
01:07Alkylation of β-Ketoester Enolates: Acetoacetic Ester Synthesis
3.3K
Acetoacetic ester synthesis is a method to obtain ketones from alkyl halides and β-keto esters. The reaction occurs in the presence of an alkoxide base that abstracts the acidic proton of the β-keto esters. The step results in an enolate ion which is doubly stabilized. The enolate then reacts with an alkyl halide via the SN2 process to produce an alkylated ester intermediate with a new C–C bond. The hydrolysis of the intermediate, followed by acidification, results in an...
3.3K