関連する実験動画
Updated: Jul 8, 2026

08:33
An Ex vivo Culture System to Study Thyroid Development
Published on: June 6, 2014
甲状腺ホルモンは,呼吸制御の調整,成熟,アデニンヌクレオチドトランスロケータの発現を心臓で in vivo で調整する
1Division of Cardiology, Department of Pediatrics, University of Washington School of Medicine, and Children's Hospital and Regional Medical Center, Seattle, WA 98105-0371, USA. mportm@chmc.org
Circulation
|September 12, 2000
まとめ
甲状腺ホルモンは,ミトコンドリアのアデニンヌクレオチドトランスロケータ (ANT) レベルを増やすことによって心臓の成熟を調節します. このシフトは,子羊の産後発達中のADP媒介の呼吸制御を減少させます.
科学分野:
- 心血管生理学 心血管の生理学
- ミトコンドリア生物学
- エンドクリノロジー エンドクリノロジー
背景:
- 心臓のエネルギー代謝は,産後発達中に大きな変化を経験します.
- ミトコンドリアアデニンヌクレオチドトランスロケータ (ANT) の蓄積は,呼吸制御と関連しています.
- 甲状腺ホルモンは,これらの発達変化を調節すると仮定されています.
研究 の 目的:
- 心臓のエネルギー代謝の産後成熟を調節する甲状腺ホルモンの役割を調査する.
- 甲状腺ホルモンがANT発現に影響を与え,呼吸制御に与える影響を判断する.
主な方法:
- (31) P MRスペクトロスコーピーは,甲状腺切除と対照羊の心筋高エネルギーリン酸と酸素消費量を評価するために使用されました.
- 西部と北部のブロッティングは,ANTとβ-F(1)-ATPaseのタンパク質とmRNAレベルを定量化するために使用されました.
主要な成果:
- 甲状腺切除手術を受けた子羊は,対照群と比較して,より低いピーク酸素消費と,高エネルギーリン酸維持機能の低下を示した.
- 甲状腺切除された子羊において,細胞溶性ADP濃度の上昇が観察されました.
- コントロールの心臓は,甲状腺切除された子羊と比較して,有意に高いANT mRNA (2倍) とタンパク質 (4倍) のレベルを示しました.
結論:
- 甲状腺ホルモンは,心臓におけるADP媒介の呼吸制御からの成熟のシフトの重要な調節因子である.
- 甲状腺ホルモンは,ANT mRNAとタンパク質のレベルの増加によって示される翻訳前のレベルでのANT発現に影響を与えます.
関連する概念動画
Transducer Mechanism: Enzyme-Linked Receptors
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:
The Thyroid Gland
The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
Synthesis and Regulation of Thyroid Hormones
Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
Functions of Thyroid Hormones
The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase
Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
Hyperthyroidism II: Pathophysiology
Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...

