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Updated: May 7, 2026

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Quantification of Efferocytosis by Single-cell Fluorescence Microscopy
Published on: August 18, 2018
フォスファティジルセリン特異的なアポプトシス細胞のクリアランスの受容体
V A Fadok1, D L Bratton, D M Rose
1Department of Pediatrics, National Jewish Medical and Research Center, Denver, Colorado 80206, USA. fadokv@njc.org
Nature
|May 16, 2000
まとめ
科学者たちは,リンパ球がフォスファティジルセリン経由でアポプトシス細胞を認識し,吸収することを可能にする新しい遺伝子を特定しました. この発見は,細胞死体除去と炎症調節の保存されたメカニズムに光を当てています.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
背景:
- アポプトシスは,プラズマ膜のフォスフォリピド非対称性の喪失を伴うもので,フォスファティディルセリンは外部に露出する.
- フォスファティディルセリンは,特にアポプトティック細胞のファゴサイトーシスを阻害し,その認識を示す.
- これは,特定の受容体が,アポプトシス細胞におけるフォスファティディルセリンの認識を媒介することを示唆しています.
研究 の 目的:
- アポプトティック細胞におけるフォスファティディルセリンの認識を担う遺伝子を特定し,特徴づけること.
- 免疫細胞の認識とアポプトティック細胞の吸収におけるこの遺伝子の機能を調査する.
- このフォスファティディルセリン受容体の炎症を調節する役割を探求するために.
主な方法:
- ファージディスプレイは,フォスファディチルセリンを認識する遺伝子をクローンするために使用されました.
- BおよびTリンパ球への遺伝子転移は,アポプトシス細胞の認識と吸収を評価するために行われます.
- フローサイトメトリーとモノクローナル抗体分析により,タンパク質の発現と機能を決定する.
主要な成果:
- リンパ球がリンパ細胞を認識し,フォスファティジルセリン特異的な方法でアポプトティック細胞を吸収することを可能にする遺伝子がクローン化されました.
- このタンパク質はマクロファージ,線維芽細胞,上皮細胞で発現する.
- 抗体とフォスファディチルセリンのリポソームは,ファゴシトーシスを阻害し,マクロファージの抗炎症状態を誘発した.
結論:
- フォスファティディルセリンの受容体候補が特定され,アポプトシス細胞の特定の認識とクリアランスを媒介する.
- この受容体は,ファゴシトーシス中の炎症反応を調節する役割を果たします.
- C. elegansとD. melanogasterの遺伝子の高い同質性は,種間のアポプトティック細胞除去のための保存されたメカニズムを示唆しています.
関連する概念動画
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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
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Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...

