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Polyphenols Isolated from Allium cepa L. Induces Apoptosis by Induction of p53 and Suppression of Bcl-2 through Inhibiting PI3K/Akt Signaling Pathway in AGS Human Cancer Cells

BACKGROUND: The extract of Allium cepa Linn is commonly used as adjuvant food for cancer therapy. We assumed that it includes a potential source of anti-cancer properties. METHODS: We investigated anti-cancer effects of polyphenols extracted from lyophilized A. cepa Linn (PEAL) in AGS human cancer c...

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Detalles Bibliográficos
Autores principales: Lee, Won Sup, Yi, Sang Mi, Yun, Jeong Won, Jung, Ji Hyun, Kim, Dong Hoon, Kim, Hye Jung, Chang, Seong-Hwan, Kim, GonSup, Ryu, Chung Ho, Shin, Sung Chul, Hong, Soon Chan, Choi, Yung Hyun, Jung, Jin-Myung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Korean Society of Cancer Prevention 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4189478/
https://www.ncbi.nlm.nih.gov/pubmed/25337568
Descripción
Sumario:BACKGROUND: The extract of Allium cepa Linn is commonly used as adjuvant food for cancer therapy. We assumed that it includes a potential source of anti-cancer properties. METHODS: We investigated anti-cancer effects of polyphenols extracted from lyophilized A. cepa Linn (PEAL) in AGS human cancer cells. RESULTS: PEAL inhibited cell growth in a dose-dependent manner. It was related to caspase-dependent apoptosis. We confirmed this finding with annexin V staining. PEAL up-regulated p53 expression, and subsequent Bax induction, down regulated Bcl-2 protein, anti-apoptotic protein. In addition, PEAL suppressed Akt activity and PEAL-induced apoptosis were significantly accentuated with Akt inhibitor (LY294002). CONCLUSIONS: Our data suggested that PEAL induce caspase-dependent apoptosis through mitochondrial pathway by up-regulating p53 protein, and subsequent Bax protein as well as by modulating Bcl-2 protein, and that PEAL induces caspase-dependent apoptosis at least in part through the inhibition of phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway. This study provides evidence that PEAL might be useful for the treatment of cancer.