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Curcumin Alleviates Arecoline-induced Oral Submucous Fibrosis via the FOSL1/MAPK8 Axis
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Curcumin Alleviates Arecoline-induced Oral Submucous Fibrosis via the FOSL1/MAPK8 Axis
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Journal Article
Curcumin Alleviates Arecoline-induced Oral Submucous Fibrosis via the FOSL1/MAPK8 Axis
2025
Overview
Oral submucous fibrosis (OSF) is a precancerous lesion of the oral cavity. Areca nut consumption can cause OSF through sustained activation of buccal mucosal fibroblasts (BMFs). This study explored the effect of curcumin on arecoline-induced BMF activation and its mechanism of action. BMFs were isolated and identified by immunofluorescence detection of fibroblast surface markers vimentin and S100A4. After transfection with FOSL1- or MAPK8-related vectors, BMFs were activated by arecoline and treated with curcumin. Scratch and transwell assays were performed to detect cell migration. ChIP and luciferase reporter assays were conducted to detect the binding of FOSL1 to the MAPK8 promoter. RT-qPCR was used to detect FOSL1 and MAPK8 mRNA expression. Western blotting was used to detect FOSL1, MAPK8, COL1A1, α-SMA, Smad2, and p-Smad2 proteins. Curcumin treatment inhibited arecoline-induced fibroblast migration, reduced the expression of myofibroblast markers COL1A1, α-SMA, and p-Smad2, and downregulated the expression of FOSL1 and MAPK8. FOSL1 or MAPK8 overexpression enhanced migration and increased COL1A1, α-SMA, and p-Smad2 expression in curcumin-treated cells. FOSL1 bound to the MAPK8 promoter and promoted MAPK8 expression. Simultaneous FOSL1 overexpression and MAPK8 knockdown, compared to FOSL1 overexpression, reduced cell migration and inhibited COL1A1, α-SMA, and p-Smad2 expression. In conclusion, curcumin targets FOSL1 to reduce MAPK8 expression, thereby suppressing arecoline-induced fibroblast activation.
Publisher
Springer US,Springer Nature B.V
Subject
/ Biological and Medical Physics
/ Biomedical and Life Sciences
/ Cell Movement - drug effects
/ Collagen Type I - metabolism
/ Collagen Type I, alpha 1 Chain
/ Curcumin
/ Fibrosis
/ Humans
/ Oral Submucous Fibrosis - chemically induced
/ Oral Submucous Fibrosis - drug therapy
/ Oral Submucous Fibrosis - metabolism
/ Oral Submucous Fibrosis - pathology
/ Proto-Oncogene Proteins c-fos - genetics
/ Proto-Oncogene Proteins c-fos - metabolism
/ Signal Transduction - drug effects
/ Vimentin
