イシズ　アヤコ   Ishizu Ayako   石津　綾子    所属   医学部 医学科    職種   教授・基幹分野長
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Megakaryocytes are essential for HSC quiescence through the production of thrombopoietin.
掲載誌名	正式名：Biochemical and biophysical research communications 略　 称：Biochem Biophys Res Commun ISSNコード：10902104/0006291X
掲載区分	国外
巻・号・頁	454(2),pp.353-7
著者・共著者	Nakamura-Ishizu Ayako, Takubo Keiyo, Fujioka Masato, Suda Toshio
発行年月	2014/11
概要	Tissue homeostasis demands regulatory feedback, suggesting that hematopoietic stem cell (HSC) activity is controlled in part by HSC progeny. Yet, cell extrinsic HSC regulation has been well characterized only in niche cells of non-hematopoietic origin. Here we identify feedback regulation of HSCs by megakaryocytes (Mks), which are mature hematopoietic cells, through production of thrombopoietin (Thpo), a cytokine pertinent for HSC maintenance. Induced ablation of Mk cell population in mice perturbed quiescent HSCs in bone marrow (BM). The ablation of Mks resulted in decreased intra-BM Thpo concentration presumably due to Thpo production by Mks. Thpo administration Mk ablated mice restored HSC functions. Overall, our study establishes Mk as an essential cellular component of the HSC niche and delineates cytokine-oriented regulation of HSCs by their own progeny.
DOI	10.1016/j.bbrc.2014.10.095
PMID	25451253