一种皮肤感染性慢性溃疡动物模型的构建方法

doi:10.13418/j.issn.1001-165x.2023.5.11

Abstract

Abstract: Objective To construct an animal model of cutaneous infectious chronic ulcer. Methods After the wound of C57BL/6 mice was caused by drug treatment and magnet, the wound was covered with 3M sterile transparent dressing, and the changes of the mouse wound were observed and recorded. On the 3rd, 7th, 14th, 21st and 28th days after extrusion, the wound site was taken from the material, and the pathological changes of the wound were observed by HE staining, Masson staining, immunohistochemical staining and 16SrDNA detection. Results In general, it was observed that there was carrion covering on the 3rd day, exudate exudation, and the carrion increased on the 28th day, and the wound healing rate was less than 0 on the 1st-28th day. Compared with normal skin, HE staining showed a large number of inflammatory cell infiltrates and necrotic tissue fragments at the wound site; Masson staining showed that only a small number of collagen fibers were scattered in the necrotic tissue at the wound site, and the arrangement was loose; Immunohistochemistry showed that the positive rate of M1 macrophages at the wound site was significantly higher than that of the surrounding normal skin (P<0.001), there was no difference in the positive rate of M2 type, and the ratio of M1 to M2 macrophages was up to 10; immunohistochemistry showed that the inflammatory factors TNF-α and IL-1β were highly expressed at the wound site on day 14; 16SrDNA detection showed that the bacterial diversity on day 0 was obvious, and after the third day, the proteobacteria phylum accounted for more than 90%, and the diversity of wound bacteria disappeared, and dysbacteriosis appeared. Conclusion In this study, the use of drugs to increase the level of oxidative stress in mice, the method of magnet extrusion simulated ischemic necrosis of wound tissues, and the 3M membrane promoted the formation of wound carrion and dysbacteria, and the results of general observation, histological staining, immunohistochemistry and microbiota 16SrDNA are all consistent with the development characteristics of chronic skin ulcers in clinical practice. This modeling method can successfully construct an animal model of skin infectious chronic ulcers.

Key words: Skin ulcer, , , Inflammation, , , , Macrophages, , , Dysbiosis

CLC Number:

R641

Chen Yinyan, Zhang Min, Wang Xueer, Lu Kui, Fang Zhaoxin, Zhang Lin. A method of constructing an animal model of cutaneous infectious chronic ulcer[J]. Chinese Journal of Clinical Anatomy, 2023, 41(5): 565-571.

References 28

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A method of constructing an animal model of cutaneous infectious chronic ulcer

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