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成人T細胞の祖先は,骨髄性潜在力を保持しています
Haruka Wada1, Kyoko Masuda, Rumi Satoh
1Laboratory for Lymphocyte Development, RIKEN Research Center for Allergy and Immunology, Yokohama 230-0045, Japan.
Nature
|April 11, 2008
まとめ
血液形成の古典的なモデルは,新しい発見によって挑戦されています. 早期成人のチムスの祖先は,骨髄性潜在性を保持し,胎児および成人の血液形成の両方の骨髄性ベースのモデルをサポートします.
科学分野:
- 免疫学 免疫学とは
- 発達生物学 発達生物学について
- ヘマトポエーシス (血液形成) とは
背景:
- 血液形成は,幹細胞が様々な血統に微分化することを意味します.
- クラシックモデルでは,共通リンパ性原始体 (CLP) と共通骨髄性赤血球原始体 (common myelo-erythroid progenitors) が区別されている.
- 以前の研究で,胎児マウスにおける"骨髄膜基"モデルが提案され,古典的な見解に異議を唱えた.
研究 の 目的:
- 成人マウスのミエロイドベースの血液形成モデルの妥当性を調査する.
- 成人チムスの初期の祖先集団の微分化可能性を特定する.
- T細胞の祖先が vivo で他の骨髄性系統を生成できるかどうかを決定する.
主な方法:
- 早期成人のチムスの細胞集団のクローン分析.
- T細胞,B細胞,NK細胞,デンドリット細胞,およびマクロファージのプロジェニータの可能性の評価.
- 胸膜環境内のT細胞の祖先のインビボ研究.
主要な成果:
- 早期成人のチムスの祖先は,B細胞の可能性の喪失を示した.
- これらの祖先は,マクロファージ,T細胞,NK細胞,およびデンドリット細胞のための重要な可能性を保持しました.
- T細胞の原始体は, in vivo で成人のチムス内のマクロファージに微分することが示されました.
結論:
- 発見は,T細胞がCLPからのみ発生する古典的なモデルに異議を唱える.
- この結果は,成人幹細胞の分化に適用される"ミエロイドベースの"血液形成モデルを支持する.
- この研究は,成人の血液形成における早期リンパ球発作の原始体における骨髄性潜在的持続性に関する証拠を提供します.
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