• 1. Department of Orthopaedics, the Second Hospital of Jilin University, Changchun Jilin, 130041, P.R.China;
  • 2. Department of Ophthalmology, the Second Hospital of Jilin University, Changchun Jilin, 130041, P.R.China;
HUANGLanfeng, Email: hlf@jlu.edu.cn
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Objective To explore the morphological and functional features of tissue engineered composite constructed with bone mesenchymal stem cells (BMSCs) as seeding cells, thermosensitive collagen hydrogel (TCH) and poly-L-lactic acid (PLLA) as the extracellular matrix (ECM) scaffolds in the dynamic culture system. Methods BMSCs were separated from long bones of Fischer344 rat, and cultured; and BMSCs at the 3rd generation were seeded on the ECM scaffold constructed with braided PLLA fiber and TCH. The BMSCs-ECM scaffold composite was cultured in the dynamic culture system which was designed by using an oscillating device at a frequency of 0.5 Hz and at swing angle of 70° (experimental group), and in the static culture system (control group) for 7 days. The general observation and scanning electron microscopy (SEM) observation were performed; total DNA content was measured at 0, 1, 3, and 7 days. Results PLLA was surrounded by collagen to form translucent gelatiniform in 2 groups; and compact membrane developed on the surface of PLLA. SEM observation showed that BMSCs had high viability and were fusiform in shape with microvilli on the surface of cells, and arranged in line; collagen and cells filled in the pores of PLLA fiber in the experimental group. The cells displayed a flat shape on the surface; there were less cells filling in the pores of PLLA fiber in the control group. At 1, 3, and 7 days, total DNA content in the experimental group was significantly higher than that in control group (P < 0.05). The total DNA content were increased gradually with time in 2 groups, showing significant difference between at 0 day and at 7 days (P < 0.05). Conclusion The ECM constructed with TCH and PLLA has good biocompatibility. The dynamic cultivation system can promote the cell proliferation, distribution, and alignment on the surface of the composite, so it can be used for tissue engineered composite in vitro.

Citation: XUFeixiang, ZHAOJinsong, GUOBin, MAJianchao, HUANGLanfeng. CONSTRUCTION OF TISSUE ENGINEERED COMPOSITE WITH THERMOSENSITIVE COLLAGEN HYDROGEL IN DYNAMIC CULTURE SYSTEM. Chinese Journal of Reparative and Reconstructive Surgery, 2016, 30(3): 309-313. doi: 10.7507/1002-1892.20160061 Copy

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