Bone marrow mesenchymal stromal cells in multiple myeloma: Their role as active contributors to myeloma progression

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Abstract

Multiple myeloma (MM) is a hematological malignancy of plasma cells that proliferate and accumulate within the bone marrow (BM). Work from many groups has made evident that the complex microenvironment of the BM plays a crucial role in myeloma progression and response to therapeutic agents. Within the cellular components of the BM, we will specifically focus on mesen-chymal stromal cells (MSCs), which are known to interact with myeloma cells and the other components of the BM through cell to cell, soluble factors and, as more recently evidenced, through extracellular vesicles. Multiple structural and functional abnormalities have been found when characterizing MSCs derived from myeloma patients (MM-MSCs) and comparing them to those from healthy donors (HD-MSCs). Other studies have identified differences in genomic, mRNA, mi-croRNA, histone modification, and DNA methylation profiles. We discuss these distinctive features shaping MM-MSCs and propose a model for the transition from HD-MSCs to MM-MSCs as a con-sequence of the interaction with myeloma cells. Finally, we review the contribution of MM-MSCs to several aspects of myeloma pathology, specifically to myeloma growth and survival, drug re-sistance, dissemination and homing, myeloma bone disease, and the induction of a pro-inflamma-tory and immunosuppressive microenvironment.

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Maiso, P., Mogollón, P., Ocio, E. M., & Garayoa, M. (2021, June 1). Bone marrow mesenchymal stromal cells in multiple myeloma: Their role as active contributors to myeloma progression. Cancers. MDPI. https://doi.org/10.3390/cancers13112542

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