title: [Identification of mesenchymal stem cells derived from rheumatoid arthritis synovial fluid and their regulatory effect on osteoblast formation].
abstract: This study was purposed to investigate the influence of inflammatory microenvironment on mesenchymal stem cells (MSCs) and regulatory effect of MSCs on osteoblast formation. The MSCs were isolated from synovial fluid of patients with rheumatoid arthritis (RASF-MSCs) and were cultured, the immunotypes of RASF-MSCs were detected by flow cytometry, the ability to differentiate RASF-MSCs into osteoblasts and adipocytes was determined by means of osteogenic and adipogenic induction, the regulatory effect of RASF-MSCs on osteoblast formation was assayed by co-culturing RASF-MSCs whth CD14(+) monocytes and in situ tartrate-resistant acid phosphatase staining. The results showed that RASF-MSCs highly expressed CD105, CD73, CD29, CD44, CD166 and HLA-ABC. Meanwhile, they lowly expressed CD34, CD45, CD31, HLA-DR, CD80 and CD86. However, RASF-MSCs decreased multi-differentiation capability as compared with BM-MSCs. More interestingly, RASF-MSC significantly promoted osteoclasts formation (p < 0.05) when co-cultured with monocytes. It is concluded that MSCs from rheumatoid arthritis synovial fluid exert typical MSC phenotypes but displayed decline of multi-differentiation capability. RASF-MSCs especially show promoting effect on osteoclastogenesis. The findings of this study may contribute to the understanding biological behavior of MSCs in pathological microenvironment.
authors.affiliation: Department of Cell Biology, Institute of Basic Medical Sciences, Academy of Military Medical Sciences, Beijing 100850, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Zhu
authors.forename: Xiao-Xia
authors.initials: XX
authors.lastname: Jiang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.forename: Yuan-Lin
authors.initials: YL
authors.lastname: Liu
authors.forename: Xiu-Sen
authors.initials: XS
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ning
authors.initials: N
authors.lastname: Mao
mesh_terms: D001172:Arthritis, Rheumatoid; D001854:Bone Marrow Cells / Q000166:cytology*; D002454:Cell Differentiation; D002478:Cells, Cultured; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000166:cytology*; D010006:Osteoblasts / Q000166:cytology*; D013582:Synovial Fluid / Q000166:cytology*