Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (52): 8456-8462.doi: 10.3969/j.issn.2095-4344.2014.52.017

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Collagen gel dressings repair diabetic skin defects and promote angiogenesis  

Lei Jing1, 2, 3, Liu Xu-zhao2, 3, Chen Dan-chang2, 3, Zhang Yong-bin4, Tang Shun-qing1, 3   

  1. 1Institute of Biomedical Engineering, Jinan University, Guangzhou 510632, Guangdong Province, China; 2Guangzhou Trauer Biotechnology Co., Ltd., Guangzhou 510663, Guangdong Province, China; 3Guangdong Medical Collagen Engineering Technology Research and Development Center, Guangzhou 510663, Guangdong Province, China; 4 Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Revised:2014-12-01 Online:2014-12-17 Published:2014-12-17
  • Contact: Tang Shun-qing, Professor, Doctoral supervisor, Institute of Biomedical Engineering, Jinan University, Guangzhou 510632, Guangdong Province, China; Guangdong Medical Collagen Engineering Technology Research and Development Center, Guangzhou 510663, Guangdong Province, China
  • About author:Lei Jing, Studying for doctorate, Institute of Biomedical Engineering, Jinan University, Guangzhou 510632, Guangdong Province, China; Guangzhou Trauer Biotechnology Co., Ltd., Guangzhou 510663, Guangdong Province, China; Guangdong Medical Collagen Engineering Technology Research and Development Center, Guangzhou 510663, Guangdong Province, China
  • Supported by:

    the Special Fund for the Innovative and Developmental Region of Marine Economy in Guangdong Province, No. GD2012-B03-002; the Science and Technology Plan of Guangdong Province, No. 2012B070800007; the Innovation Fund for Small- and Medium-Sized Enterprises of Science and Technology Based Firms, No. 11C26214413212; the Science and Technology Plan of Guangzhou City, No. 2014JR000021

Abstract:

BACKGROUND: Collagen has been shown to promote the restoration of damaged tissue wound and to accelerate wound healing.

OBJECTIVE: To observe the effect of collagen gel dressing on defect healing of diabetic skin and its role to promote capillary regeneration.
METHODS: Forty of 160 Sprague-Dawley rats were used as normal controls, and the other 120 rats were used to make diabetic models with intraperitoneal injection of streptozotocin. After 9 weeks, 120 model rats were randomly divided into model group, positive control group and experimental group. Then full-thickness skin wounds were made on the back of all rats. The normal group and model group were externally treated with vaseline. Experimental group was externally treated with collagen gel dressing, and recombinant human epidermal growth factor gel was used in the positive control group. Finally, the healing area of wounds and newborn capillaries were observed.
RESULTS AND CONCLUSION: At 1 week of administration, animals in the normal control group showed faster wound healing, but the wound healing rates in the other groups were changed insignificantly; at 2 weeks of administration, the healing rate of the normal control group was fastest, and the nonhealing area in the model group was larger than that in the positive control and experimental groups; at 3 weeks of administration, the nonhealing area of the normal control and experimental groups was smaller than that of the model and positive control groups; at 4 weeks of administration, the nonhealing area of the normal control and positive control groups was smaller than that of the model and experimental groups. In addition, wound healing was better in the experimental group than the positive control group at 2 and 3 weeks of administration; while the number of capillaries in the experimental group was more than that of the other three groups at 1, 2, 3 weeks of administration. These results suggest that collagen gel dressings can promote healing of diabetic wounds and improve healing quality.

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


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Key words: collagen, gels, bandages, hydrocolloid, diabetes mellitus

CLC Number: