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Stem Cell Rev. 2016 Dec;12(6):613-620.

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

Author information

1
Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 South Floyd Street, Louisville, KY, 40202, USA.
2
Division of Cardiovascular Medicine, Gill Heart Institute, University of Kentucky, Lexington, KY, USA.
3
Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 South Floyd Street, Louisville, KY, 40202, USA. mzrata01@louisville.edu.
4
Department of Regenerative Medicine, Warsaw Medical University, Warsaw, Poland. mzrata01@louisville.edu.

Abstract

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.

KEYWORDS:

C1P; HO-1; PLC-β2; S1P; SDF-1; Stem cell homing

PMID:
27704316
PMCID:
PMC5106505
DOI:
10.1007/s12015-016-9689-x
[Indexed for MEDLINE]
Free PMC Article

Conflict of interest statement

The authors declare no potential conflicts of interest.

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