Extracellular vesicle cross-talk in the bone marrow microenvironment: implications in multiple myeloma.
2016
// Jinheng Wang 1,* Sylvia Faict 1,* Ken Maes 1 , Elke De Bruyne 1 , Els Van Valckenborgh 1 , Rik Schots 2 , Karin Vanderkerken 1,* and Eline Menu 1,* 1 Department of Hematology and Immunology, Myeloma Center Brussels, Vrije Universiteit Brussels (VUB), Brussels, Belgium 2 Department of Clinical Hematology, Universitair Ziekenhuis Brussel, Brussels, Belgium * These authors have contributed equally to this work Correspondence to: Eline Menu, email: // Keywords : extracellular vesicle; exosome; multiple myeloma; bone marrow microenvironment; cross-talk Received : December 21, 2015 Accepted : February 21, 2016 Published : February 29, 2016 Abstract The bone marrow (BM) represents a complex microenvironment containing stromal cells, immune cells, osteoclasts, osteoblasts, and hematopoietic cells, which are crucial for the immune response, bone formation, and hematopoiesis. Apart from soluble factors and direct cell-cell contact, extracellular vesicles (EVs), including exosomes, were recently identified as a third mediator for cell communication. Solid evidence has already demonstrated the involvement of various BM-derived cells and soluble factors in the regulation of multiple biological processes whereas the EV-mediated message delivery system from the BM has just been explored in recent decades. These EVs not only perform physiological functions but can also play a role in cancer development, including in Multiple Myeloma (MM) which is a plasma cell malignancy predominantly localized in the BM. This review will therefore focus on the multiple functions of EVs derived from BM cells, the manipulation of the BM by cancer-derived EVs, and the role of BM EVs in MM progression.
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