Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (21): 3310-3315.doi: 10.3969/j.issn.2095-4344.2014.21.006

Previous Articles     Next Articles

Preparation and cytotoxicity evaluation of chitosan-sodium alginate composite gel 

Zhang Lin-pu, Wang Guan-hua, Lian Xiao-li, Li Yan-ni, Dai Xiao-hua   

  1. Central Laboratory, Tianjin Stomatological Hospital, Stomatological Hospital of Nankai University, Tianjin 300041, China
  • Online:2014-05-21 Published:2014-05-21
  • About author:Zhang Lin-pu, Associate chief physician, Central Laboratory, Tianjin Stomatological Hospital, Stomatological Hospital of Nankai University, Tianjin 300041, China
  • Supported by:

    the Scientific Foundation of Tianjin Health Bureau, No. 09kz50 

Abstract:

BACKGROUND: Sodium alginate and chitosan are the polycation and polyanion natural polymer materials respectively, and they can be crosslinking agents complementing each other to form composite gel and avoid the cytotoxicity resulting from some common crosslinking agents .
OBJECTIVE: To prepare the chitosan-sodium alginate composite gel and evaluate its cytotoxicity in vitro.
METHODS: Chitosan was dissolved in 0.25 mol/L acetic acid to make a 30 g/L mass concentration solution, and 0.1 mol/L NaOH solution was added to neutralize its acidity. Neutralization of the chitosan solutions leads to the formation of a precipitate in ultrasmall particles. Then the chitosan and 3% sodium alginate solution in deionized water were mixed in 1:1 volume ratio by high frequency oscillating to produce composite gel. The composite gel were detected by scanning electron microscopy and Fourier transform infrared spectrometry after freeze-drying. The 24-hour and 72-hour leaching solutions of composite gel, 24-hour and 72-hour leaching solutions of polyethylene and phenol solution were added to the L-929 cells’ culture medium respectively in order to evaluate the cytotoxicity of composite gel in vitro.
RESULTS AND CONCLUSION: The results of Fourier transform infrared spectrometry showed the variation of characteristic peak values of composite gel which were different from sodium alginate and chitosan; and under scanning electron microscope, a spatial network structure formed with abundant intervals. Result of the cytotoxicity valuation was qualified for the chitosan-sodium alginate composite gel. These findings indicate that the chitosan-sodium alginate composite gel can be used as tissue engineering scaffold materials.


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words: chitosan, gels, cytotoxicity tests, immunologic

CLC Number: