期刊
AMERICAN JOURNAL OF VETERINARY RESEARCH
卷 72, 期 7, 页码 884-892出版社
AMER VETERINARY MEDICAL ASSOC
DOI: 10.2460/ajvr.72.7.884
关键词
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资金
- National Institute of Arthritis and Musculoskeletal and Skin Diseases [K08 AR049201]
- Rohovsky Summer Research Fund
- Comparative Orthopedic Molecular Medicine and Applied Research Laboratory
- Department of Veterinary Clinical Sciences
- Ohio State University
- GlaxoSmithKline
- ACVP/STP Coalition Resident Fellowship
Objective-To determine effects of various concentrations of retinoic acid (RA) or a synthetic RA receptor antagonist (LE135) on equine chondrocytes or bone marrow derived equine mesenchymal stem cells (BMDMSCs) in monolayer cultures. Sample-Articular cartilage and BMDMSCs from 5 clinically normal horses. Procedures-Mono layers of chondrocytes cultured in standard media and of BMDMSCs cultured in chondrogenic media were treated with RA at concentrations of 0, 0.1, 1, or 10 mu M or LE135 at concentrations of 0, 0.1, 1, or 10 mu M on day 0. On days 7 and 14, samples were analyzed for DNA concentration, chondrocyte morphology or features consistent with chondrogenesis (ie, chondral morphology [scored from 0 to 4]), and gene expression of collagen type la (Cl), collagen type II (CID, and aggrecan. Results-Chondrocytes treated with RA had more mature chondral morphology (range of median scores, 3.0 to 4.0) than did untreated controls (range of median scores, 0.5 to 0.5). Chondrocytes treated with LE135 did not sustain chondrocyte morphology. All BMDMSCs had evidence of chondral morphology or high CII:CI ratio. Retinoic acid (1 or 10 mu M) or LE135 (10 mu M) treatment decreased DNA content of BMDMSC cultures. At 0.1 and 1 mu M concentrations, LE135 weakly but significantly increased chondral morphology scores, compared with untreated controls, but lack of aggrecan expression and lack of increased CII:CI ratio, compared with that of controls, did not affect chondrogenesis. Conclusions and Clinical Relevance-RA promoted maturation and hypertrophy in chondrocytes but not BMDMSCs in monolayer cultures. Deficiency or blockade of RA may prevent hypertrophy and maturation of differentiated chondrocytes. (Am J Vet Res 2011;72:884-892)
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