CD14 and plasma cell myeloma: In this study, we have used U133P 2.0 Affymetrix microarrays to analyse the expression of a large panel of MGF in BM aspirates from MM patients, in purified cell subpopulations present in the BM of those patients, i.e CD138+ multiple myeloma cells (MMC), CD14+ monocytes, CD15+ polymorphonuclear neutrophils (PMN) and CD3+ T cells, as well as in in vitro-generated bone marrow stromal cells (BMSC) and osteoclasts.