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- W2333034190 abstract "<h3>Objectives</h3> Leptin has recently been shown to affect cancer proliferation and invasion through multiple pathways. In the current study, we investigated the role of leptin in endometrial carcinoma (EC) apoptosis and the underlying mechanisms of action. <h3>Methods</h3> Immunoprecipitation was used to characterize leptin receptor expression in EC lines. The levels of nuclear factor κB–inducing kinase (NIK)/IκB kinase (IKK) signaling proteins were analyzed using Western blot. In addition, Western blot and immunohistochemical analyses were used to detect the hierarchy of these proteins in EC tissues. Quantitative cancer cell apoptosis assay was performed using flow cytometry after incubation of cells with Annexin-V/fluorescein/propidium iodide, 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolcarbocyanine iodide or staining of cancer cell DNA fragments with propidium iodide. <h3>Results</h3> Leptin induced a decrease in apoptosis in Ishikawa and HEC-1A EC cells, partly through nuclear factor κB activation via phosphorylation in the IKK/NIK pathway. Inhibition of IKK or NIK partly neutralized this suppression of apoptosis. Expression levels of leptin receptors (Ob-Rs) and IKK/NIK signaling proteins were higher in poorly and moderately differentiated than in well-differentiated EC tissues, and higher Ob-Rs expression was observed in clinical stages II and III, compared with stage I EC (<i>P</i> = 0.012). High serum leptin concentration displayed mild correlation (<i>r</i> = 0.23, <i>P</i> = 0.035) with degree of EC differentiation. <h3>Conclusions</h3> Leptin inhibits EC apoptosis partly through activation of the NIK/IKK pathway in vitro. Ob-Rb overexpression seems to facilitate EC progression." @default.
- W2333034190 created "2016-06-24" @default.
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- W2333034190 date "2015-06-01" @default.
- W2333034190 modified "2023-10-16" @default.
- W2333034190 title "Leptin Inhibits the Apoptosis of Endometrial Carcinoma Cells Through Activation of the Nuclear Factor κB–inducing Kinase/IκB Kinase Pathway" @default.
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- W2333034190 doi "https://doi.org/10.1097/igc.0000000000000440" @default.
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