1 Ocak 2018 Dergi makalesi Açık Erişim

Kose, Sevil; Aerts-Kaya, Fatima; Kopru, Cagla Zubeyde; Nemutlu, Emirhan; Koskonmaz, Baris; Karaosmanoglu, Beren; Taskiran, Ekim Zihni; Altun, Belgin; Cetinkaya, Duygu Uckan; Korkusuz, Petek

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    <subfield code="a">Granulocyte colony-stimulating factor (G-CSF) is a well-known hematopoietic stem cell (HSC)mobilizing agent used in both allogeneic and autologous transplantation. However, a proportion of patients or healthy donors fail to mobilize a sufficient number of cells. New mobilization agents are therefore needed. Endocannabinoids (eCBs) are endogenous lipid mediators generated in the brain and peripheral tissues and activate the cannabinoid receptors CB1 and CB2. We suggest that eCBs may act as mobilizers of HSCs from the bone marrow (BM) under stress conditions as beta-adrenergic receptors (Adr beta). This study demonstrates that BM mesenchymal stem cells (MSCs) secrete anandamide (AEA) and 2-arachidonylglycerol (2-AG) and the peripheral blood (PB) and BM microenvironment contain AEA and 2-AG. 2-AG levels are significantly higher in PB of the G-CSF-treated group compared with BM plasma. BM mononuclear cells (MNCs) and CD34 HSCs express CB1, CB2, and Adr beta subtypes. CD34+ HSCs had higher CB1 and CB2 receptor expression in G-CSF-untreated and G-CSF-treated groups compared with MSCs. MNCs but not MSCs expressed CB1 and CB2 receptors based on qRT-PCR and flow cytometry. AEA- and 2-AG-stimulated HSC migration was blocked by eCB receptor antagonists in an in vitro migration assay. In conclusion, components of the eCB system and their interaction with Adr beta subtypes were demonstrated on HSCs and MSCs of G-CSF-treated and G-CSF-untreated healthy donors in vitro, revealing that eCBs might be potential candidates to enhance or facilitate G-CSF-mediated HSC migration under stress conditions in a clinical setting. (C) 2018 ISEH Society for Hematology and Stem Cells. Published by Elsevier Inc. All rights reserved.</subfield>
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    <subfield code="a">Kose, Sevil</subfield>
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    <subfield code="a">Human bone marrow mesenchymal stem cells secrete endocannabinoids that stimulate in vitro hematopoietic stem cell migration effectively comparable to beta-adrenergic stimulation</subfield>
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