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Abdelbaset-Ismail A, Cymer M, Borkowska-Rzeszotek S, Brzeźniakiewicz-Janus K, Rameshwar P, Kakar SS, Ratajczak J, Ratajczak MZ. Bioactive Phospholipids Enhance Migration and Adhesion of Human Leukemic Cells by Inhibiting Heme Oxygenase 1 (HO-1) and Inducible Nitric Oxygenase Synthase (iNOS) in a p38 MAPK-Dependent Manner. Stem Cell Rev Rep 2020; 15:139-154. [PMID: 30302660 PMCID: PMC6366663 DOI: 10.1007/s12015-018-9853-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Bioactive phospholipids, including sphingosine-1-phosphate (S1P), ceramide-1-phosphate (C1P), lysophosphatidylcholine (LPC), and its derivative lysophosphatidic acid (LPA), have emerged as important mediators regulating the trafficking of normal and cancer cells. While the role of S1P in regulating migration of hematopoietic cells is well established, in this work we compared its biological effects to the effects of C1P, LPC, and LPA. We employed 10 human myeloid and lymphoid cell lines as well as blasts from AML patients. We observed that human leukemic cells express functional receptors for phospholipids and respond to stimulation by phosphorylation of p42/44 MAPK and AKT. We also found that bioactive phospholipids enhanced cell migration and adhesion of leukemic cells by downregulating expression of HO-1 and iNOS in a p38 MAPK-dependent manner but did not affect cell proliferation. By contrast, downregulation of p38 MAPK by SB203580 enhanced expression of HO-1 and iNOS and decreased migration of leukemic cells in vitro and their seeding efficiency to vital organs in vivo after injection into immunodeficient mice. Based on these findings, we demonstrate that, besides S1P, human leukemic cells also respond to C1P, LPC, and LPA. Since the prometastatic effects of bioactive phospholipids in vivo were mediated, at least in part, by downregulating HO-1 and iNOS expression in a p38 MAPK-dependent manner, we propose that inhibitors of p38 MAPK or stimulators of HO-1 activity will find application in inhibiting the spread of leukemic cells in response to bioactive phospholipids.
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Affiliation(s)
- Ahmed Abdelbaset-Ismail
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY, 40202, USA.,Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Monika Cymer
- Center for Preclinical Research and Technology, Department of Regenerative Medicine, Warsaw Medical University, Warsaw, Poland
| | | | | | | | - Sham S Kakar
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY, 40202, USA
| | - Janina Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY, 40202, USA
| | - Mariusz Z Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, 500 S. Floyd Street, Rm. 107, Louisville, KY, 40202, USA. .,Center for Preclinical Research and Technology, Department of Regenerative Medicine, Warsaw Medical University, Warsaw, Poland.
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Adamiak M, Abdel-Latif A, Ratajczak MZ. Purinergic signaling regulates mobilization of hematopoietic stem cells. Oncotarget 2018; 9:36052-36054. [PMID: 30546825 PMCID: PMC6281409 DOI: 10.18632/oncotarget.26290] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 10/26/2018] [Indexed: 12/19/2022] Open
Affiliation(s)
- Mateusz Adamiak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA; Department of Regenerative Medicine Warsaw Medical University, Warsaw, Poland
| | - Ahmed Abdel-Latif
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA; Department of Regenerative Medicine Warsaw Medical University, Warsaw, Poland
| | - Mariusz Z Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA; Department of Regenerative Medicine Warsaw Medical University, Warsaw, Poland
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