細胞酸塩変換は,サイトカインの指示的な作用によってリンパ性結合の原始体の細胞酸塩変換である
M Kondo1, D C Scherer, T Miyamoto
1Department of Pathology, Stanford University School of Medicine, California 94305-5324, USA. motonari.kondo@stanford.edu
Nature
|October 3, 2000
まとめ
サイトカインは,血液の発達における細胞の運命決定を指示することができます. インターレウキン-2とGM-CSFはリンパ性原始体を骨髄性系統にリダイレクトし,血液形成における重要なサイトカインシグナル伝達役割を明らかにした.
科学分野:
- ヘマトポエーシス (血液形成) とは
- 細胞および分子生物学
- 免疫学 免疫学とは
背景:
- サイトカインは,血液細胞の成長と生存を調節することが知られている.
- 血球形成細胞系統へのコミットメントを指示するサイトカインの指導的な役割は,まだあまり理解されていません.
研究 の 目的:
- 血液形成細胞の運命を指揮するサイトカインの指導的役割を調査する.
- 共通リンパ性祖先が,サイトカイン刺激によって他の系統にリダイレクトできるかどうかを判断する.
主な方法:
- 共通リンパ性原始体におけるインタールユーキン-2 (IL-2) と花粉細胞/マクロファージコロニー刺激因子 (GM-CSF) 受容体の外因発現.
- 異なるシグナリングドメインを特定するために,IL-2受容体のβ鎖変異体の分析.
- 血液形成性幹細胞および先駆体における内生性サイトカイン受容体発現の評価.
主要な成果:
- 共通リンパ性原始体は,IL-2とGM-CSFによる刺激により,骨髄性系統に微分化させることができる.
- IL-2受容体の異なった細胞質ドメインは,粒細胞と単細胞の分化信号を媒介し,分離可能な経路を示しています.
- 内生的なGM-CSFおよびM-CSF受容体は,IL-2-誘発の骨髄分化後の先駆体で上調される.
結論:
- サイトカインシグナル伝達は,血液形成の過程で細胞命運決定を積極的に調節する.
- 骨髄系を駆動するサイトカイン受容体のダウンレギュレーションは,リンパ系へのコミットメントにおいて決定的な役割を果たす可能性があります.
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