• 1. Department of Orthopedics, Orthopedic Center of Chinese PLA, Southwest Hospital, Third Military Medical University, Chongqing, 400038, P. R. China;
  • 2. Department of Neurobiology, Third Military Medical University;
TANGKanglai, Email: tangkanglai@hotmail.com
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Objective To investigate the effect of transforming growth factor β3 (TGF-β3) at different concentrations on the differentiation of rat Achilles-derived tendon stem cells (TSCs) in vitro. Methods TSCs were isolated from the tendon tissue of male Sprague Dawley rats (aged 3 weeks) by enzymatic digestion method and cultured for 3 passages. The TSCs were stimulated with TGF-β3 at the concentrations of 5.0, 2.5, 1.0, and 0 ng/mL. At 1, 3, and 5 days, the mRNA expressions of tendogenic differentiation related genes[collagen type Ⅰ,tenascin C (TNC), tenomodulin (TNMD), scleraxis (Scx)], osteogenic differentiation related genes[Runt related transcription factor 2 (Runx2) and alkaline phosphatase (ALP)], chondrogenic differentiation genes (Sox9 and collagen type Ⅱ),and adipogenic differentiation genes[AP2 and peroxisome proliferator-activated receptor γ (PPARγ)] were measured by real-time quantitative PCR (qRT-PCR). Results TSCs could differentiated in different directions after treated with TGF-β3 at different concentrations at different time points. TGF-β3 was able to induce TSCs differentiated into tenocytes, which was related to the concentration and time of duration, and the two factors have interaction. Stimulation of TGF-β3 at low concentration and for short time could inhibit non-tendogenic differentiation of TSCs, but at high concentration and for long time, TGF-β3 enhanced TSCs differented into osteocytes or chondrocytes. Conclusion Effects of TGF-β3 on TSCs differentiation are complicated and depend on the concentration and time of duration, which may be a key factor between tendogenic and non-tendogenic differentiations of TSCs.

Citation: GUOYupeng, TANGKanglai, ZHANGJiqiang, CHENBo, SHIYouxing. EFFECTS OF TRANSFORMING GROWTH FACTOR β3 AT DIFFERENT CONCENTRATIONS ON DIFFERENTIATION OF TEENDON STEM CELLS IN VITRO. Chinese Journal of Reparative and Reconstructive Surgery, 2015, 29(5): 620-625. doi: 10.7507/1002-1892.20150133 Copy

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