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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/15142
Title: Cleistanthoside A tetraacetate-induced DNA damage leading to cell cycle arrest and apoptosis with the involvement of p53 in lung cancer cells
Authors: Podchanart Wanitchakool
Surawat Jariyawat
Kanoknetr Suksen
Darunee Soorukram
Patoomratana Tuchinda
Pawinee Piyachaturawat
Mahidol University
Keywords: Pharmacology, Toxicology and Pharmaceutics
Issue Date: 5-Dec-2012
Citation: European Journal of Pharmacology. Vol.696, No.1-3 (2012), 35-42
Abstract: Lung cancer is the leading cause of cancer-related death worldwide and resistance to chemotherapeutic drugs is the major obstacle for effective treatment. The present study investigated the anticancer potential of cleistanthoside A tetraacetate (CAT), a derivative of cleistanthoside A from Phyllanthus taxodiifolius Beille on human lung cancer cells, LU-1. Multiple molecular approaches were used in this study and include measuring the anti-proliferative effect of CAT in LU-1 cells using flow cytometry; evaluating the induction of apoptosis by monitoring DNA fragmentation, phosphatidylserine externalization and activation of caspase-3 activity; and assaying the expression of regulatory proteins involved in cell cycle arrest and apoptosis using immunoblots. CAT potently inhibited LU-1 proliferation through an early G1 arrest with down-regulation of cdk4/6 and cyclin D1 proteins. CAT also inhibited DNA topoisomerase IIα activity resulting in DNA damage and increased the expression of the p53 protein with the subsequent induction of apoptosis. A decrease in the Bcl-2/Bax ratio, activation of caspase-3 activity and cleavage of PARP accompanied apoptosis. CAT is highly toxic to lung cancer and its primary targets are the inhibition of topoisomerase IIα activity and inducing apoptosis through a G1 arrest. These properties indicate that CAT is a promising anticancer agent for treatment of lung cancer. © 2012 Elsevier B.V.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84869081134&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/15142
ISSN: 18790712
00142999
Appears in Collections:Scopus 2011-2015

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