Genetic ablation of mast cells redefines the role of mast cells in skin wound healing and bleomycin-induced fibrosis

Willenborg, Sebastian and Eckes, Beate and Brinckmann, Jürgen and Krieg, Thomas and Waisman, Ari and Hartmann, Karin and Roers, Axel and Eming, Sabine A.. (2014) Genetic ablation of mast cells redefines the role of mast cells in skin wound healing and bleomycin-induced fibrosis. Journal of Investigative Dermatology, 134 (7). pp. 2005-2015.

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Official URL: https://edoc.unibas.ch/70773/

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Conclusive evidence for the impact of mast cells (MCs) in skin repair is still lacking. Studies in mice examining the role of MC function in the physiology and pathology of skin regenerative processes have obtained contradictory results. To clarify the specific role of MCs in regenerative conditions, here we used a recently developed genetic mouse model that allows conditional MC ablation to examine MC-specific functions in skin. This mouse model is based on the cell type-specific expression of Cre recombinase in connective tissue-type MCs under control of the Mcpt5 promoter and the Cre-inducible diphtheria toxin receptor-mediated cell lineage ablation by diphtheria toxin. In response to excisional skin injury, genetic ablation of MCs did not affect the kinetics of reepithelialization, the formation of vascularized granulation tissue, or scar formation. Furthermore, genetic ablation of MCs failed to prevent the development of skin fibrosis upon bleomycin challenge. The amount of deposited collagen and the biochemistry of collagen fibril crosslinks within fibrotic lesions were comparable in MC-depleted and control mice. Collectively, our findings strongly suggest that significant reduction of MC numbers does not affect skin wound healing and bleomycin-induced fibrosis in mice, and provide to our knowledge previously unreported insight in the long-debated contribution of MCs in skin regenerative processes.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Department of Biomedicine, University Hospital Basel > Allergy and Immunity (Hartmann)
UniBasel Contributors:Hartmann, Karin
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:01 Jun 2020 11:51
Deposited On:01 Jun 2020 11:51

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