title: [Effect of mesenchymal stem cells on multiple myeloma cells growth and inhibition of bortezomib induced cell apoptosis].
abstract: OBJECTIVE
  To investigate the role of mesenchymal stem cells (BMSCs) in multiple myeloma (MM) bone marrow (BM) microenrivonment and their effect on myeloma cells survival and bortezomib induced apoptosis.
  
  
  METHODS
  BMSCs were derived from BM of untreated myeloma patients (MM-BMSCs) and healthy donors (HD-BMSCs), respectively. The phenotype, proliferation time and cytokine secretion of MM-BMSCs were detected and compared with HD-BMSCs. Then BMSCs were co-cultured with myeloma cell line NCI-H929 and bortezomib in vitro. The NCI-H929 cells proliferation and bortezomib induced cell apoptosis were investigated.
  
  
  RESULTS
  MM-BMSCs and HD-BMSCs were isolated successfully. The phenotype of MM-BMSCs was similar to that of HD-BMSCs. Expressions of CD73, CD105, CD44 and CD29 were positive, but those of CD31, CD34, CD45 and HLA-DR (< 1%) negative. The proliferation time of MM-BMSCs was longer than that of HD-BMSCs (82 h vs 62 h, P < 0.05). Moreover, over-expressions of IL-6 and VEGF in MM-BMSCs culture supernatant were detected as compared with that in HD-BMSCs [(188.8 ± 9.4) pg/ml vs (115.0 ± 15.1) pg/ml and (1497.2 ± 39.7) pg/ml vs (1329.0 ± 21.1) pg/ml, respectively]. MM- BMSCs supported survival of the myeloma cells NCI-H929 and protected them from bortezomib induced cell apoptosis.
  
  
  CONCLUSIONS
  MM-BMSCs is benefit for myeloma cells proliferation and against cell apoptosis induced by bortezomib. Over-expression of IL-6 and VEGF maybe play a critical role in these effects.
authors.affiliation: State Key Laboratory of Experimental Hematology, Institute of Hematology & Blood Diseases Hospital, CAMS & PUMC, Tianjin 300020, China.
authors.forename: Mu
authors.initials: M
authors.lastname: Hao
authors.forename: Zhen-Qing
authors.initials: ZQ
authors.lastname: Xie
authors.forename: You-Jin
authors.initials: YJ
authors.lastname: Han
authors.forename: Gang
authors.initials: G
authors.lastname: An
authors.forename: Heng-Xing
authors.initials: HX
authors.lastname: Meng
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.forename: Chang-Hong
authors.initials: CH
authors.lastname: Li
authors.forename: De-Hui
authors.initials: DH
authors.lastname: Zou
authors.forename: Lu-Gui
authors.initials: LG
authors.lastname: Qiu
mesh_terms: D017209:Apoptosis / Q000187:drug effects; D001854:Bone Marrow Cells / Q000166:cytology; D000069286:Bortezomib; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000378:metabolism; D009101:Multiple Myeloma / Q000378:metabolism
chemical_list: D000069286:Bortezomib