Article ; Online: Ketotifen directly modifies the fibrotic response of human skin fibroblasts.
2024 Volume 14, Issue 1, Page(s) 7076
Abstract: Fibrosis is a destructive, end-stage disease process. In the skin, it is associated with systemic sclerosis and scarring with considerable health burden. Ketotifen is a clinical antihistamine and mast cell stabilizer. Studies have demonstrated mast cell- ... ...
Abstract | Fibrosis is a destructive, end-stage disease process. In the skin, it is associated with systemic sclerosis and scarring with considerable health burden. Ketotifen is a clinical antihistamine and mast cell stabilizer. Studies have demonstrated mast cell-dependent anti-fibrotic effects of ketotifen but direct effects on fibroblasts have not been determined. Human dermal fibroblasts were treated with pro-fibrotic transforming growth factor-β1 (TGFβ) followed by ketotifen or control treatments to determine direct effects on fibrotic fibroblasts. Ketotifen impaired TGFβ-induced α-smooth muscle actin gene and protein responses and decreased cytoskeletal- and contractility-associated gene responses associated with fibrosis. Ketotifen reduced Yes-associated protein phosphorylation, transcriptional coactivator with PDZ binding motif transcript and protein levels, and phosphorylation of protein kinase B. In a fibroblast-populated collagen gel contraction assay, ketotifen reduced the contractile activity of TGFβ-activated fibroblasts. In a murine model of bleomycin-induced skin fibrosis, collagen density and dermal thickness were significantly decreased in ketotifen-treated mice supporting in vitro findings. These results support a novel, direct anti-fibrotic activity of ketotifen, reducing pro-fibrotic phenotypic changes in fibroblasts and reducing collagen fibres in fibrotic mouse skin. Together, these findings suggest novel therapeutic potential and a novel mechanism of action for ketotifen in the context of fibrosis. |
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MeSH term(s) | Humans ; Mice ; Animals ; Ketotifen/pharmacology ; Ketotifen/metabolism ; Ketotifen/therapeutic use ; Fibrosis ; Skin/metabolism ; Scleroderma, Systemic/metabolism ; Collagen/metabolism ; Fibroblasts/metabolism ; Bleomycin/pharmacology ; Transforming Growth Factor beta1/metabolism ; Cells, Cultured ; Transforming Growth Factor beta/metabolism |
Chemical Substances | Ketotifen (X49220T18G) ; Collagen (9007-34-5) ; Bleomycin (11056-06-7) ; Transforming Growth Factor beta1 ; Transforming Growth Factor beta |
Language | English |
Publishing date | 2024-03-25 |
Publishing country | England |
Document type | Journal Article |
ZDB-ID | 2615211-3 |
ISSN | 2045-2322 ; 2045-2322 |
ISSN (online) | 2045-2322 |
ISSN | 2045-2322 |
DOI | 10.1038/s41598-024-57776-7 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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