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Depression: 21st Century Solutions + The Dark Side of Wheat

Abstract Title:

Resveratrol induces senescence-like growth inhibition of U-2 OS cells associated with the instability of telomeric DNA and upregulation of BRCA1.

Abstract Source:

Mech Ageing Dev. 2009 Aug;130(8):528-37. Epub 2009 Jun 25. PMID: 19559722

Abstract Author(s):

[No authors listed]

Article Affiliation:

Department of Tumor Biology, Maria Skłodowska - Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland. rusinm@rocketmail.com

Abstract:

Resveratrol decreases cancer risk and improves health of laboratory animals. However, it can also promote genomic instability. Part of the beneficial activity of resveratrol may result from the activation of SIRT1 deacetylase. We examined how resveratrol influenced the growth of human cancer cell lines of different origin: osteosarcoma (U-2 OS) and lung adenocarcinoma (A549) and how it modulated the expression as well as the localization of key proteins, involved in DNA repair and cell cycle regulation. Resveratrol-induced growth arrest was associated with signs of stress-induced senescence. Differential expression of BRCA1, cyclin B1, pRb and p21 in U-2 OS and A549 cells indicates that resveratrol can engage various molecular mechanisms to arrest cell cycle progression. In subset of U-2 OS cells, the upregulated BRCA1 formed foci closely associated with WRN and the telomeric protein (TRF1). Moreover, resveratrol induced telomeric instability in U-2 OS cells and the activation of DNA damage signaling in both cell lines, manifested as the phosphorylation of histone H2AX at serine 139 and of p53 at serines 15 and 37. Our data are consistent with the hypothesis that resveratrol inhibits cell growth and induces senescence by altering DNA metabolism.

Study Type : In Vitro Study
Additional Links
Pharmacological Actions : Antioxidants : CK(8430) : AC(3132)
Additional Keywords : Stilbenes : CK(402) : AC(242)

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Sayer Ji
Founder of GreenMedInfo.com

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Depression: 21st Century Solutions + The Dark Side of Wheat

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