肝臓のサイトクロームP450の神経内分泌の調節は,下垂体におけるパラベントリキュラおよびアーキュア核のN-メチル-D-アスパルテート受容体によって行われます
Renata Pukło1, Ewa Bromek1, Agnieszka Basińska-Ziobroń1
1Department of Pharmacokinetics and Drug Metabolism, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland.
まとめ
視床下にあるN-メチル-D-アスパルテート (NMDA) 受容体のGluN2Bサブユニットを阻害すると,肝臓のP450 (P450) 酵素に悪影響を及ぼす. この神経内分泌の調節効果は,薬物の代謝に不可欠であり,臨床実務において考慮されるべきである.
科学分野:
- 神経内分泌学
- 薬理学について
- ヘパトロジー
背景:
- N-メチル-D-アスパルテート (NMDA) 受容体のGluN2Bサブユニットは,様々な生理学的プロセスに関与しています.
- 以前の研究では,GluN2BアンタゴニストであるCP-101,606が,全身投与後に肝細胞クロームP450 (P450) の活性に影響することが示された.
- P450酵素の中央神経内分泌調節は,まだ完全に理解されていません.
研究 の 目的:
- 肝臓P450の中枢神経内分泌の調節にGluN2B抗体CP-101,606を下垂体パラベントリキュール (PVN) と弧状核 (ARC) に投与した影響を調査する.
- PVNとARCにおけるNMDA受容体のP450発現と活性制御における役割を明らかにする.
主な方法:
- 男性ラットは5日間連続してPVNまたはARCにCP-101, 606の双方向脳内注射を受けた.
- 下垂体,下垂体,血清ホルモンのレベルを測定した.
- 肝臓のP450酵素発現 (mRNAとタンパク質) と活性が評価されました.
主要な成果:
- CP-101,606を脳内PVNに投与すると,ソマトスタチン,成長ホルモン (GH),コルチコステロン,T3レベルが変化し,複数の肝臓CYPイソフォーム (CYP1A1/ 2,CYP2A1/ 2,CYP2B1/ 2,CYP2C11,CYP3A) の発現と活性が低下した.
- ARCへの投与は,GHを放出するホルモン,GH,およびコルチコステロンのレベルに影響を与え,CYP1A1/ 2,CYP2C11の発現/活性,およびCYP3A2のmRNAレベルを低下させた.
- PVNとARCの両方の標的投与は,肝臓のP450調節にCP-101, 606の負の効果を示した.
結論:
- 下垂体PVNとARCのNMDA受容体は肝臓P450酵素の中央神経内分泌の調節に重要な役割を果たします.
- GluN2BアンタゴニストであるCP-101,606は,この調節経路に負の影響を及ぼします.
- これらの発見は,NMDA受容体抗剤が薬物代謝酵素に及ぼす影響を考慮する重要性を強調しています,特に神経学的または精神学的治療において他の薬剤と併用された場合です.
関連する概念動画
Regulation of Food Intake
350
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...
350
Regulation of Hormone Secretion
4.0K
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...
Humoral...
4.0K
Diencephalon: Hypothalamus and Coordination
2.2K
The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
2.2K
Hormonal Regulation
44.2K
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.
44.2K
Neural Regulation of Blood Pressure
3.4K
The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
3.4K
Regulation of the Digestive System
928
Digestive activity regulation hinges on three primary components. Activation is prompted by a multitude of mechanical and chemical indicators, primarily detected by receptors within the stomach and intestines' walls. These receptors predominantly respond to factors such as mechanical stretching of the organ walls, changes in pH and osmolarity, and the presence of digesting materials and their by-products.
The effectors in this regulation system are glands and smooth muscles. Activation of...
The effectors in this regulation system are glands and smooth muscles. Activation of...
928


