Journal of Jilin University(Medicine Edition) ›› 2021, Vol. 47 ›› Issue (2): 265-274.doi: 10.13481/j.1671-587X.20210203

• Research in basic medicine • Previous Articles     Next Articles

Inhibitory effect of prunus tomentosa thunb total flavonoids on skin hypertrophic scar in mice and its mechanism

Tianqi ZOU1,Lin BAI1,Zhengxu ZHANG1,He LI1,Chunmei WANG1,Jinghui SUN1,Jianguang CHEN1,Xi CHEN2(),Chengyi ZHANG1()   

  1. 1.Department of Pharmacology,College of Pharmacy,Beihua University,Jilin 132013,China
    2.Department of Etiology,College of Medical Sciences,Beihua University,Jilin 132013,China
  • Received:2020-07-30 Online:2021-03-28 Published:2021-03-25
  • Contact: Xi CHEN,Chengyi ZHANG E-mail:846617750@qq.com;zhchyjl@163.com

Abstract: Objective

To investigate the effect of prunus tomentosa thunb total flavone (PTTTF) on the formation of skin hypertrophic scar (HS) in the mice, and to elucidate its possible mechanism.

Methods

A total of 96 male ICR mice were randomly divided into blank control group, model control group (given same amount of blank matrix as the plastics), low, middle and high doses of prunus tomentosa thunb plastics (PTTP) groups (given 0.4, 0.8, and 1.6 g·L-1)PTTP and positive control (DXM) group; there were 16 mice in each group. Except for blank control group, the mice in other groups were used to set up two full-thickness skin defect models with diameter of 10 mm made on both sides of the back by using a skin punch with the spine as the midline. The drug was given once a day and smeared with 0.1 mL each time. The wound healing was observed every day and the wound healing rate was calculated. Four mice in each group were killed on the 10th day, 20th day, 30th day and 40th day, respectively, and the full-thickness skin tissue of the wound was taken.The pathomorphology of HS skin tissue was observed by HE staining. Western blotting method was used to detect the protein expression levels of cysteinyl aspartats specific proteinase-3(Cleaved caspase-3), B cell lymphoma-2(Bcl-2) and Bcl-2 associated X protein(Bax) in skin tissue of the mice in various groups.

Results

Compared with model control group, on the 40th day, the healing rates of the mice in low, middle and high doses of PTTP groups were 98.94%, 99.14%, and 99.04%, respectively; there were significant differences (P<0.05). The results of HE staining showed that compared with model control group, the wound in different doses of PTTP groups healed faster and gradually recovered to the normal skin structure, with the formation of skin appendages such as sebaceous glands, hair follicles, sweat glands and so on. The results of Western blotting method showed that compared with model control group, the expression levels of Cleaved caspase-3 and Bax proteins in different doses of PTTP groups were increased significantly (P<0.05 or P<0.01), while the expression levels of Bcl-2 protein were decreased significantly (P<0.05 or P<0.01).

Conclusion

PTTTF can promote wound healing and has a certain inhibitory effect on the formation of HS in the mice; and its mechanism may be related to inducing apoptosis.

Key words: prunus tomentosa thunb total flavones, wound healing, hypertrophic scar, apoptosis

CLC Number: 

  • R285.5