The ever-changing microenvironment of Staphylococcus aureus in cutaneous infections.

Autor: Zhou Z; Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, PR China.; School of Laboratory Medicine, Chengdu Medical College, Chengdu, PR China., Tian J; Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, PR China.; School of Laboratory Medicine, Chengdu Medical College, Chengdu, PR China., Li S; Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, PR China.; School of Laboratory Medicine, Chengdu Medical College, Chengdu, PR China., Fei L; Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, PR China.; School of Laboratory Medicine, Chengdu Medical College, Chengdu, PR China., Dai M; Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, PR China.; School of Laboratory Medicine, Chengdu Medical College, Chengdu, PR China., Long N; Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu, PR China.; School of Laboratory Medicine, Chengdu Medical College, Chengdu, PR China.
Jazyk: angličtina
Zdroj: Animal models and experimental medicine [Animal Model Exp Med] 2024 Oct; Vol. 7 (5), pp. 707-716. Date of Electronic Publication: 2024 May 02.
DOI: 10.1002/ame2.12413
Abstrakt: Background: Staphylococcus aureus is responsible for the majority of skin and soft tissue infections, which are often diagnosed at a late stage, thereby impacting treatment efficacy. Our study was designed to reveal the physiological changes at different stages of infection by S. aureus through the combined analysis of variations in the skin microenvironment, providing insights for the diagnosis and treatment of S. aureus infections.
Methods: We established a murine model of skin and soft tissue infection with S. aureus as the infectious agent to investigate the differences in the microenvironment at different stages of infection. By combining analysis of the host immune status and histological observations, we elucidate the progression of S. aureus infection in mice.
Results: The results indicate that the infection process in mice can be divided into at least two stages: early infection (1-3 days post-infection) and late infection (5-7 days post-infection). During the early stage of infection, notable symptoms such as erythema and abundant exudate at the infection site were observed. Histological examination revealed infiltration of numerous neutrophils and bacterial clusters, accompanied by elevated levels of cytokines (IL-6, IL-10). There was a decrease in microbial alpha diversity within the microenvironment (Shannon, Faith's PD, Chao1, Observed species, Simpson, Pielou's E). In contrast, during the late stage of infection, a reduction or even absence of exudate was observed at the infected site, accompanied by the formation of scabs. Additionally, there was evidence of fibroblast proliferation and neovascularization. The levels of cytokines and microbial composition gradually returned to a healthy state.
Conclusion: This study reveals synchrony between microbial composition and histological/immunological changes during S. aureus-induced SSTIs.
(© 2024 The Authors. Animal Models and Experimental Medicine published by John Wiley & Sons Australia, Ltd on behalf of The Chinese Association for Laboratory Animal Sciences.)
Databáze: MEDLINE
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