Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (3): 514-520.doi: 10.1007/s40242-019-9007-7

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DOPA-IGF-1 Coated HA/PLGA Microspheres Promoting Proliferation and Osteoclastic Differentiation of Rabbit Bone Mesenchymal Stem Cells

LIU Guomin1,5, LI Yalong1,5, YANG Shuting2, ZHAO Yi'an3,5, LU Tiancheng4,5, JIA Wenyuan1,5, JI Xuan3,5, LUO Yungang3,5   

  1. 1. Department of Orthopedics, the Second Hospital of Jilin University, Changchun 130041, P. R. China;
    2. Department of Prosthdontics, the Hospital of Stomatology, Jilin University, Changchun 130021, P. R. China;
    3. Department of Stomatology, the Second Hospital of Jilin University, Changchun 130041, P. R. China;
    4. Life Sciences College, Jilin Agricultural University, Changchun 130118, P. R. China;
    5. Jilin Provincial Changbai Mountain Medicine Anti-tumor Engineering Center, the Second Hospital of Jilin University, Changchun, 130041, P. R. China
  • Received:2019-01-08 Revised:2019-03-22 Online:2019-06-01 Published:2019-04-26
  • Contact: LUO Yungang E-mail:luoyg@jlu.edu.cn
  • Supported by:
    Supported by the Special Health Project of Jilin Province, China(No.3D516D703429) and the Special Health Project of Department of Finance of Jilin Province, China (No.3D5177703429).

Abstract: To explore the ability of dihydroxyphenylalanine-insulin-like growth factor-1(DOPA-IGF-1) coated hydroxyapatite/poly(lactic-co-glycolic acid)(HA/PLGA) microspheres to promote the proliferation and osteoclastic differentiation of rabbit bone mesenchymal stem cells(rBMSCs), HA/PLGA microspheres with different HA content (10%, 30%, 50%, mass fraction) were prepared by electrospinning method and HA/PLGA microspheres with 50% HA were coated with IGF-1 and DOPA-IGF-1, respectively. They were co-cultured with rBMSCs, respctively. Cell counting kit-8(CCK-8) detection, confocal laser scanning microscopy(CLSM), alkaline phosphatase(ALP) detection and osteogenesis related genes COL1A1, Runx2 and bone morphogenetic protein-2(BMP-2) detection were conducted to detect the proliferation activity, cell morphology, differentiation ability and the expression level of osteogenesis-related genes of cells cultured on all microspheres groups. The results showed that rBMSCs proliferation increased in an HA content dependent manner, and cells proliferated more in the IGF-1 coated and DOPA-IGF-1 coated groups, in particular in DOPA-IGF-1 coated group, and the differences were more remarkable over time (P<0.05). HA/PLGA microspheres promoted the proliferation and osteogenic differentiation of rBMSCs, and DOPA-IGF-1 coating enhanced the proliferation and osteogenic differentiation of rBMSCs.

Key words: Biomaterial, Electrospinning, Biocompatibility, Hydrophilic polymer