Chinese Journal of Tissue Engineering Research ›› 2020, Vol. 24 ›› Issue (32): 5122-5127.doi: 10.3969/j.issn.2095-4344.2859

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Vacuum sealing drainage enhances wound healing by up-regulating collagen type I/III ratio in rats

Zhao Xin1, 2, Shi Xin1, 2, Chen Bei2, Cao Yanpeng2, Chen Yaowu2, Liu Xiaoren2, He Yusheng2, He Liyun2, Li Xiying2, Liu Jun1, 2   

  1. 1The First School of Clinical Medicine, Southern Medical University, Guangzhou 510000, Guangdong Province, China; 2Chenzhou No.1 People’s Hospital, Chenzhou 423000, Hunan Province, China
  • Received:2019-12-04 Revised:2019-12-10 Accepted:2020-01-17 Online:2020-11-18 Published:2020-09-24
  • Contact: Liu Jun, MD, Professor, Chief physician, Master’s supervisor, the First School of Clinical Medicine, Southern Medical University, Guangzhou 510000, Guangdong Province, China; Chenzhou No.1 People’s Hospital, Chenzhou 423000, Hunan Province, China
  • About author:Zhao Xin, Master candidate, Physician, the First School of Clinical Medicine, Southern Medical University, Guangzhou 510000, Guangdong Province, China; Chenzhou No.1 People’s Hospital, Chenzhou 423000, Hunan Province, China.
  • Supported by:

    the Natural Science Foundation of Hunan Province, China, No. 2017JJ2006

Abstract:

BACKGROUND: Vacuum sealing drainage can enhance acute and chronic wound healing. The ratio of collagen type I/III play a critical role in the structural stability of skin tissue and skin repair, but its change during vacuum sealing drainage accelerating wound healing remains unclear.

OBJECTIVE: To observe the effect of vacuum sealing drainage on the ratio of collagen type I/III during wound healing and to explore the potential mechanism underlying acute wound repair in rats.

METHODS: A full-thickness wound, with a diameter of 20 mm, was created on the back of healthy male rats. All model rats were then randomized into two groups: blank control and vacuum sealing drainage groups. The wound surface was photographed at three observational time points (1, 3, 7 days after operation), and wound closure rate was calculated and compared. The mRNA and protein expression levels of type I collagen and type III collagen and ratio of collagen type I/III were detected by RT-qPCR and immunohistochemistry. The structure of granulation tissue and length of re-epithelialization were histologically detected.

RESULTS AND CONCLUSION: Compared with the blank control group, treatment with vacuum sealing drainage significantly increased the expression of type I collagen and type III collagen at mRNA and protein levels (P < 0.05), enhanced wound healing rate (P < 0.05) as well as increasing the ratio of collagen type I/III starting from the 3rd day after operation (P < 0.05). To conclude, the vacuum sealing drainage can accelerate wound healing by up-regulating the protein expression of type I collagen and type III collagen, the ratio of collagen type I/III and increasing wound tensile strength.

Key words: vacuum sealing drainage, acute wound, collagen type I, collagen type III, the ratio of collagen types I/III, re-epithelialization, wound healing, granulation tissue, wound healing rate

CLC Number: