異なる2つのインタースティシャルマクロファージ集団は,特定の亜組織ニッチで組織に共存する
Svetoslav Chakarov1, Hwee Ying Lim2, Leonard Tan1
1Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore.
まとめ
2つのインタースティシャルマクロファージ (IM) 亜集団,Lyve1loMHCIIhiとLyve1hiMHCIIloは,複数の組織で特定されました. 肺線維症が悪化すると 組織ホメオスタシスに影響します
科学分野:
- 免疫学
- 細胞生物学
- 組織 ホメオスタシス
背景:
- マクロファージは組織ホメオスタシスと炎症に不可欠です
- 組織パレンキマ内のインタースティシャルマクロファージ (IMs) は十分に理解されていません.
- 既存の研究は主に主要な組織在住マクロファージ集団に焦点を当てています.
研究 の 目的:
- ネズミの肺,脂肪,心臓,皮膚におけるインタースティシャル・マクロファージ (IM) 亜集団を定義し,特徴づけること.
- 異なる組織における IM 亜集団の機能的役割と保存を調査する.
- 肺線維症などの組織病変に対する特定のMIサブ集団の影響を調査する.
主な方法:
- ネズミの肺,脂肪,心臓,皮膚からのIMの比較分析.
- マーカー発現 (Lyve1,MHCII,CX3CR1) によるIMサブ集団の特定
- 機能的役割を評価するために,新しい誘導性マクロファージ枯渇マウスモデル (Slco2b1flox/DTR) を利用した.
主要な成果:
- 保存されている2つのIM亜群を特定しました. Lyve1loMHCIIhiCX3CR1hiとLyve1hiMHCIIloCX3CR1loです.
- これらのサブポピュレーションは,異なる遺伝子発現プロファイル,フェノタイプ,機能,組織部位を示しています.
- Lyve1hiMHCIIlo IMの枯渇は,実験的な肺線維症を著しく悪化させた.
結論:
- 複数の組織に2つの異なる保存されたインタースティシャルマクロファージ (IM) 亜集団が存在する.
- これらのIMは,ニッチ依存の機能プログラミングを持っています.
- MHCII IMは肺ホメオスタシスを維持し,線維症を予防する上で重要な役割を果たします.
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