関連する実験動画
Updated: Jul 21, 2026
07:42
The CApillary FEeder Assay Measures Food Intake in Drosophila melanogaster
Published on: March 17, 2017
栄養センサーメカニズムは,ドロソフィラの成長を制御する
Julien Colombani1, Sophie Raisin, Sophie Pantalacci
1Institute for Signaling, Developmental Biology and Cancer Research, UMR6543 CNRS-Parc Valrose, 06108, Cedex 2, Nice, France.
Cell
|September 25, 2003
まとめ
ドロソフィラの脂肪体は栄養センサーとして作用し,生物の成長を調整します. この臓器におけるスリムファストアミノ酸トランスポーターのダウンレギュレーションは,体内のシグナル伝達を通じて,全身的な成長欠陥を誘発する.
科学分野:
- 発達生物学 発達生物学について
- 栄養素センシング 栄養素センシング
- エンドクリノロジー エンドクリノロジー
背景:
- 生物の成長には,栄養素の利用可能性に対する細胞の反応の調整が必要です.
- 昆虫の脂肪体は,内分泌と貯蔵の役割を含む,脊椎動物の肝臓と機能的類似性を共有しています.
研究 の 目的:
- 栄養分レベルに応じて生物の成長を調整するドロソフィラの脂肪体の役割を調査する.
- この調整に関与する遺伝子とシグナル伝達経路を特定する.
主な方法:
- ドロソフィラの成長変形剤の遺伝子スクリーニング.
- 遺伝子機能の分析 (slimfast) は,特に脂肪の体内のRNA干渉 (RNAi) を使用します.
- TSC/TORとPI3-キナーゼを含む下流信号伝達経路の調査.
主要な成果:
- アミノ酸トランスポーターであるスリムファストを,重要な成長変容体として特定.
- 脂肪の体内のスリムファストのダウンレギュレーション フェノコピー 栄養不足下で観察される生物の成長欠陥.
- 脂肪体におけるTSC/TORシグナル伝達と,外周組織におけるPI3-キナーゼシグナル伝達の遠隔抑制に関する証拠.
結論:
- ドロソフィラの脂肪体は,中央の栄養センサーとして機能します.
- 生物の成長は,体脂肪から発生するユーモラルメカニズムによって調節されます.
- 脂肪体は,栄養素を感知し,全身信号伝達経路を調節することにより,成長を調整します.
関連する概念動画
02:36Meristems and Plant Growth
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
02:35Key Elements for Plant Nutrition
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the atmosphere, the...
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
01:19Regulation of Metabolism
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...
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
01:30Regulation of Food Intake
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...