Chinese Journal of Tissue Engineering Research ›› 2018, Vol. 22 ›› Issue (9): 1370-1375.doi: 10.3969/j.issn.2095-4344.0466

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Effect of 1,25(OH)2D3 on type I collagen secretion in adipose-derived mesenchymal stem cells and its mechanism

Zhai Min1, Hu Xiao-gen2, Liu Hong-lin1, Xu Shi-qing1, Wang Zai1, Zhang Wen-jian1   

  1. 1Institute of Clinical Medical Sciences, 2Department of Plastic Surgery, China-Japan Friendship Hospital, Beijing 100029, China
  • Revised:2018-01-29 Online:2018-03-28 Published:2018-04-03
  • Contact: Zhang Wen-jian, Ph.D., Master’s supervisor, Professor, Investigator, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China; Wang Zai, M.D., Associate investigator, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
  • About author:Zhai Min, Master candidate, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81370873, 81402451; the Talent Youth Plan of the China-Japan Friendship Hospital, No. 2015-QNYC-B-06

Abstract:

BACKGROUND: Adipose-derived mesenchymal stem cells (ADMSCs) have been reported to improve wound healing. However, type I collagen secreted by ADMSCs will contribute to scar formation. Therefore, inhibiting type I collagen secretion from ADMSCs will strengthen its clinical application.
OBJECTIVE: To investigate the effect of 1,25(OH)2D3 on secretion of type I collagen by ADMSCs and its mechanism.
METHODS: Human ADMSCs were isolated by collagenase digestion, and identified by flow cytometry. ADMSCs at passage 4 were cultured in DMEM/F12 medium containing different concentrations of 1,25(OH)2D3 (10-7, 10-8, 10-9, 10-10 and 0 mol/L) respectively for 4 days. Then, the concentration of type I collagen in cell supernatant was measured by ELISA. Real-time PCR and western blot were used to detect the expression of Smad3 at mRNA and protein levels and phosphorylated protein Smad3 level in ADMSCs cultured with and without 1,25(OH)2D3. To analyze the contribution of Smad3 to the effect of 1,25(OH)2D3, Smad3 inhibitor was added to culture medium 30 minutes before adding 1,25(OH)2D3, and type I collagen in cell supernatant was detected by ELISA at 4 days after addition of SMAD3 inhibitor.
RESULTS AND CONCLUSION: 1,25(OH)2D3 inhibited the secretion of type I collagen by ADMSCs in a dose-dependent manner. The results of real-time PCR and western blot showed that the expression of Smad3 was upregulated by 1,25(OH)2D3, and the results of western blot showed that the phosphorylated Smad3 protein level in ADMSCs was significantly increased by 1,25(OH)2D3. Moreover, the inhibition of type I collagen secretion by 1,25(OH)2D3 could be blocked by Smad3 inhibitor. These results indicate that 1,25(OH)2D3 can inhibit the secretion of type I collagen from ADMSCs by up-regulating the expression of Smad3.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Adipose Tissue, Mesenchymal Stem Cells, Calcitriol, Collagen Type I, Smad3 Protein, Tissue Engineering

CLC Number: