LIU Zhenning 1 , JIA Changqing 2 , HAN Changxu 2 , LIANG Feng 2 , WANG Junfeng 2 , BAI Shuling 3 , TONG Hao 3
  • 1Department of Emergency, 2Department of Spine and Joint Surgery, Shengjing Hospital of China Medical University, Shenyang Liaoning, 110004, P.R.China;;
  • 3Department of Tissue Engineering of Basal Medical College, China Medical Univeristy.;
Adi pose-derived stem cells; Growth differentiation factor 5; Cell culture; Differentiation; Chondrocyte
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Objective To investigate the feasibil ity and effect of inducing adi pose-derived stem cells (ADSCs) treated with growth differentiation factor 5 (GDF-5) to undergo chondrogenic differentiation in vitro. Methods Six healthy Japanese rabbits aged 3 months (2-3 kg) of clean grade were chosen, irrespective of sex. ADSCs were isolated and cultured with collagenase digestion, then were detected and identified by vimentin immunohistochemistry and CD44, CD49d, CD106
immunofluorescence staining. ADSCs at passage 3 were used and the cell density was adjusted to 1 × 106/mL, then the ADSCs were treated with 0, 10, 100 ng/mL GDF-5 and common cultural medium, respectively. The morphology changes of the induced ADSCs were observed by inverted contrast phase microscope and their growth state were detected by MTT. The mRNA quantities of Col II and proteoglycan expressed by the induced ADSCs were detected with RT-PCR. The Col II proteoglycan synthesized by the induced ADSCs were detected with alcian blue staining, toluidine blue staining, immunohistochemistry staining, and Western blot method. Results ADSCs mostly presented small sphere, fusiform and polygon shape with positive expression of CD44 and CD49d and negative expression of CD106 and vimentin. The ADSCs treated with 100 ng/mL GDF-5 presented sphere or sphere-l ike change and vigorous prol iferation. The mRNA quantities of Col II and proteoglycan synthesized by the induced ADSCs treated with 0, 10, 100 ng/mL GDF-5 and common cultural medium increased in a dose-dependent manner at 7 days. There were significant differences among all the groups (P  lt; 0.05), except that no significant difference was evident between the 0 ng/mL group and the 10 ng/mL group (P  gt; 0.05). When ADSCs were treated with 100 ng/mL GDF-5 for 14 days, the Col II and the mRNA and protein quantities of ptoteoglycan reached the peak, and the results of alcian blue, toluidine blue and Col II
immunohistochemistry staining were positive. Conclusion ADSCs treated with certain concentration of GDF-5 have higher expression of Col II and proteoglycan and possess partial biological function of chondrocyte.

Citation： LIU Zhenning,JIA Changqing,HAN Changxu,LIANG Feng,WANG Junfeng,BAI Shuling,TONG Hao. EXPERIMENTAL STUDY ON CHONDROGENIC DIFFERENTIATION OF RABBIT ADIPOSE-DERIVED STEM CELLS TREATED WITH GROWTH DIFFERENTIATION FACTOR 5. Chinese Journal of Reparative and Reconstructive Surgery, 2009, 23(4): 483-489. doi: Copy