Arsenite Induces COX-2 Expression and Protects Skin Cells from Apoptosis
Author Information
Author(s): Ouyang Weiming, Zhang Dongyun, Ma Qian, Li Jingxia, Huang Chuanshu
Primary Institution: Nelson Institute of Environmental Medicine, New York University School of Medicine
Hypothesis
Does arsenite exposure induce COX-2 expression and affect apoptosis in mouse epidermal cells?
Conclusion
Arsenite exposure induces COX-2 expression through the IKKβ/NFκB pathway, which protects skin cells from apoptosis.
Supporting Evidence
- Arsenite exposure significantly increased COX-2 protein levels in Cl41 cells.
- Transfection with IKKβ-KM made Cl41 cells more sensitive to apoptosis induced by arsenite.
- Knockdown of COX-2 expression increased susceptibility to arsenite-induced apoptosis.
- Overexpression of COX-2 in IKKβ−/− MEFs conferred resistance to arsenite-induced apoptosis.
Takeaway
When skin cells are exposed to arsenite, they make more COX-2, which helps them survive instead of dying. This could lead to skin cancer.
Methodology
The study used luciferase reporter assays and Western blots to analyze COX-2 induction and various genetic approaches to elucidate the signaling pathway involved.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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