人間の胎児の骨髄とダウン症候群における血液と免疫の発達
Laura Jardine1,2, Simone Webb1, Issac Goh1
1Biosciences Institute, Newcastle University, Newcastle upon Tyne, UK.
Nature
|September 30, 2021
まとめ
胎児の骨髄 (BM) は第2 trimesterの初期に血液と免疫細胞の完全な範囲を急速に形成します. この研究は胎児のBM発達と ダウン症候群におけるその変化を明らかにした.
科学分野:
- 発達生物学
- 血液学
- 免疫学
背景:
- 骨髄における血液形成は,血液と免疫細胞の生成に不可欠です.
- 胎児の骨髄 (FBM) の発達と胎児と新生児の健康におけるその役割はほとんど不明である.
- FBMの発達を理解することは,初期のヒトの血液形成の理解の鍵です.
研究 の 目的:
- 胎児の骨髄 (FBM) の発達経路を調査し,そのストロマ成分を含む.
- 初期の人類の発達期におけるFBMのマルチオームの風景を特徴づける.
- FBM,胎児の肝臓,帯血の血液生成原体の違いを特定する.
主な方法:
- FBMにおけるmRNAと多重化タンパク質エピトープ発現のマルチオーム評価
- 胎児の肝臓,FBM,帯血からの血液生成原体の比較分析
- FBM内の血管構造と微小環境の調査
主要な成果:
- 血液と免疫細胞の完全なレパートリーは,FBMで第2 trimesterの6〜7週間のウィンドウ内で確立されます.
- FBMは,新しい粒細胞,エオシノフィール,およびデンドリット細胞サブセットを含む広範な骨髄細胞多様化をサポートします.
- 胎児の肝臓と比較して,FBMにおけるBリンパ球の有意な膨張; 明確な血管区画化が観察されました.
- 血液生成原体は組織特有の転写および機能的違いを示します.
- ダウン症候群 (トリソミー21) は,内在的および外在的要因によるBリンパ球,赤血球および骨髄細胞の発達障害と関連しています.
結論:
- 胎児の骨髄 (FBM) は妊娠初期に急速で包括的な発達を経て,血液と免疫細胞の完全なスペクトルを確立します.
- FBMの独特の細胞および微環境特性は,胎児および新生児の血液形成に寄与する.
- ダウン症候群 (トリソミー21) で観察された血液学的異常には,FBMの発達と微小環境の変化が関係しています.
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