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Hormonal Regulation01:40

Hormonal Regulation

37.6K
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.
37.6K
Feedback Loops01:01

Feedback Loops

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In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
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Hormonal Regulation01:33

Hormonal Regulation

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Regulation of Metabolism01:19

Regulation of Metabolism

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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
9.1K
Regulation of Hormone Secretion01:19

Regulation of Hormone Secretion

6.5K
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...
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Regulation of Food Intake01:30

Regulation of Food Intake

2.8K
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...
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Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
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エネルギーバランスを調節するホルモン依存モジュールです.

Biao Wang1, Noel Moya, Sherry Niessen

  • 1Peptide Biology Laboratories, The Salk Institute for Biological Studies, 10010 N. Torrey Pines Road, La Jolla, CA 92037, USA.

Cell
|May 14, 2011
PubMed
まとめ
この要約は機械生成です。

科学者たちは,空腹中のハエのエネルギーバランスを制御するSIK3とHDAC4を含む新しいホルモン調節経路を発見しました. この経路は,SIRT1経路と共に働き,脂肪とグルコースの代謝を管理する.

さらに関連する動画

Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
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Author Spotlight: Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator
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Last Updated: May 4, 2026

Mechanism of Regulation of Adipocyte Numbers in Adult Organisms Through Differentiation and Apoptosis Homeostasis
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Determining Basal Energy Expenditure and the Capacity of Thermogenic Adipocytes to Expend Energy in Obese Mice
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Author Spotlight: Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator
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Author Spotlight: Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator

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科学分野:

  • メタボリック調節 メタボリック調節
  • 分子内分泌学は分子内分泌学である.
  • ドロソフィラの遺伝学

背景:

  • メタゾアンは,エネルギーバランスを維持するために断食中に脂肪燃焼に移行します.
  • SIRT1がFOXOを脱酸化し,ストレスや栄養不足下でのカタボリック遺伝子発現を促進する.
  • FOXO脱酸化のホルモン調節は完全に理解されていません.

研究 の 目的:

  • ホルモン信号がFOXO脱酸化を調節するメカニズムを特定する.
  • エネルギーバランスにおけるホルモン依存モジュールの役割を明らかにする.

主な方法:

  • Drosophila melanogasterをモデル生物として利用しました.
  • Ser/ThrキナーゼSIK3とクラスIIaデセチラゼHDAC4.4の役割について調査しました.
  • FOXOの活性,リン酸化,および細胞下部局在性を分析した.
  • ハエの飢餓感度と脂質蓄積を評価した.

主要な成果:

  • FOXO活動を調節するホルモン依存モジュールとしてSIK3とHDAC4を特定しました.
  • SIK3のリン酸化物質と,栄養 (インスリン刺激) 中の細胞質のHDAC4を分離する.
  • 断食中のSIK3の不活性化により,HDAC4の核転位とFOXOの脱酸化が発生する.
  • SIK3変異のハエは,FOXO依存性脂解により飢餓感を示します.
  • HDAC4発現を減少させることで,SIK3変異のハエの脂質蓄積が回復した.

結論:

  • SIK3とHDAC4を含む新しいホルモン調節経路がFOXO活動とエネルギーバランスを制御します.
  • この経路はSIRT1経路と並行して機能する.
  • この発見は,断食中の代謝適応についての洞察を提供します.