The Involvment of Hematopoietic-Specific PLC -β2 in Homing and Engraftment of Hematopoietic Stem/Progenitor Cells

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• 作者：Mateusz Adamiak ; Malwina Suszynska ; Ahmed Abdel-Latif…
• 关键词：PLC ; β2 ; Stem cell homing ; HO ; 1 ; SDF ; 1 ; S1P ; C1P
• 刊名：Stem Cell Reviews and Reports
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：12
• 期：6
• 页码：613-620
• 全文大小：1,910 KB
• 刊物主题：Cell Biology;
• 出版者：Springer US
• ISSN：1558-6804
• 卷排序：12

文摘

Migration and bone marrow (BM) homing of hematopoietic stem progenitor cells (HSPCs) is regulated by several signaling pathways, and here we provide evidence for the involvement in this process of hematopoietic-specific phospholipase C-β2 (PLC-β2). This enzyme is involved in release of intracellular calcium and activation of protein kinase C (PKC). Recently we reported that PLC-β2 promotes mobilization of HSPCs from BM into peripheral blood (PB), and this effect is mediated by the involvement of PLC-β2 in the release of proteolytic enzymes from granulocytes and its role in disintegration of membrane lipid rafts. Here we report that, besides the role of PLC-β2 in the release of HSPCs from BM niches, PLC-β2 regulates the migration of HSPCs in response to chemotactic gradients of BM homing factors, including SDF-1, S1P, C1P, and ATP. Specifically, HSPCs from PLC-β2-KO mice show impaired homing and engraftment in vivo after transplantation into lethally irradiated mice. This decrease in migration of HSPCs can be explained by impaired calcium release in PLC-β2-KO mice and a high baseline level of heme oxygenase 1 (HO-1), an enzyme that negatively regulates cell migration.