TMEM132B-GABAA受容体は,脳内のアルコール作用を制御する
Guohao Wang1, Shixiao Peng1, Miriam Reyes Mendez1
1Synapse and Neural Circuit Research Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.
Cell
|October 2, 2024
まとめ
研究者は,TMEM132Bを新しいGABA-A受容体 (GABA-A R) の補助サブユニットとして特定しました. このタンパク質はアルコールに影響を与えます
科学分野:
- 神経科学
- 分子生物学
- 薬理学について
背景:
- アルコールは広く消費される 精神活性物質ですが 脳の正確な分子標的とメカニズムは 完全に理解されていません
- アルコールがニューロンの機能と行動に 影響を及ぼすことを理解することは アルコール乱用や関連する障害に対処するために 極めて重要です
研究 の 目的:
- アルコールが脳に作用する 新しい分子標的を特定するためです
- 特定のタンパク質がGABA-A受容体と関連する行動に及ぼす影響を解明する.
主な方法:
- TMEM132Bの機能を研究するために,ノックアウト (KO) とノッキン (KI) モデルを含むマウスの遺伝子操作を使用した.
- TMEM132BとGABA-A受容体 (GABA-A R) の間の相互作用を,海馬の神経細胞の電気生理学的記録を用いて調査した.
- 遺伝子組み換えマウスの不安解消,鎮静,アルコールの消費パターンを含むアルコールによる行動効果を評価した.
主要な成果:
- GABA-A R補助サブユニットとして TMEM132Bが発見され,アルコールの受容体に対するアロステリック効果を高める.
- TMEM132B機能の喪失は,神経細胞におけるGABA-A R電流のアルコール誘発的増強を減少させることが示された.
- 機能的なTMEM132Bが欠けていたマウスでは,アルコールによる抗不安薬と鎮静剤の効果が減少し,アルコール依存症が増加した.
結論:
- TMEM132BはGABA-A R機能の重要なレギュラーであり,脳内のアルコールの重要な分子標的である.
- TMEM132B-GABA-A R複合体は,神経伝達と複雑な行動に対するアルコールの影響に関するメカニズム的な洞察を提供します.
- この発見は アルコール関連疾患の理解と 治療の新たな道を開きます
キーワード:
AUDGABA についてGABA (A) 受容体についてGABAアレルギー性TMEM132 についてTMEM132Bアルコールアルコール使用障害アルコールアルコール依存症ディアゼパム薬物乱用ヒポカンプス抑制するシナプス伝達人身売買さらに関連する動画
09:29Investigating Drivers of Antireward in Addiction Behavior with Anatomically Specific Single-Cell Gene Expression Methods
Published on: August 4, 2022
2.1K
07:28An Inexpensive, Scalable Behavioral Assay for Measuring Ethanol Sedation Sensitivity and Rapid Tolerance in Drosophila
Published on: April 15, 2015
10.2K
関連する概念動画
01:27CNS Depressants: Alcohol and Nicotine
179
Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
179
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.2K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.2K
01:18Antiepileptic Drugs: GABAergic Pathway Potentiators
341
γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
341
01:19Ligand-gated Ion Channels
12.2K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
12.2K
01:28Depressants
101
Depressant drugs, including alcohol and sedative-hypnotics, diminish central nervous system activity by enhancing the action of gamma-aminobutyric acid (GABA), a neurotransmitter that reduces brain activity and promotes relaxation. These substances can have various therapeutic uses but also pose significant risks, especially when misused or combined.
Alcohol is a common depressant that can induce a sense of relaxation and reduced inhibition at low doses. Contrary to its occasional...
Alcohol is a common depressant that can induce a sense of relaxation and reduced inhibition at low doses. Contrary to its occasional...
101
01:00Enzyme-linked Receptors
77.5K
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...
77.5K