國家衛生研究院 NHRI:Item 3990099045/4823

NHRI > National Institute of Environmental Health Sciences > Huei Lee(2009-2011) > Periodical Articles > Item 3990099045/4823

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/4823

Title:	Subcellular localization of apurinic endonuclease 1 promotes lung tumor aggressiveness via NF-kappaB activation
Authors:	Wu, HH;Cheng, YW;Chang, JT;Wu, TC;Liu, WS;Chen, CY;Lee, H
Contributors:	Division of Environmental Health and Occupational Medicine
Abstract:	Apurinic endonuclease 1 (Ape1) is not only involved in base excision repair, but also activates some transcriptional factors through its redox activity. However, which subcellular localization of Ape1 is involved in the activation of transcriptional factor remains unclear. We first observed that Cox-2 expression was associated with cytoplasmic Ape1 expression in lung tumors and cancer cell lines. We thus hypothesize that nuclear factor (NF)-κB is activated by cytoplasmic Ape1 to cause Cox-2 expression. Herein, we generated cytoplasmic and nuclear Ape1 in Ape1-knockdown lung cancer cells by exogenous expression of Ape1 containing various deletions and/or mutations of the nuclear localization sequence. It was observed that cytoplasmic Ape1, but not nuclear Ape1, induced Cox-2 expression through NF-κB activation. NF-κB activation by cytoplasmic Ape1 was diminished by the Ape1 redox activity inhibitor resveratrol. Cells expressing cytoplasmic Ape1 exhibited tumor progression and metastasis in vitro and in vivo as xenografts, but cells expressing nuclear Ape1 did not. Patients with tumors containing elevated cytoplasmic Ape1 had a poor prognosis and a 3.722-fold risk of tumor recurrence and/or metastasis. Cytoplasmic Ape1 could therefore enhance lung tumor malignancy through NF-κB activation, suggesting that combination of cisplatin and specific redox inhibitor could improve chemotherapeutic response in patients with tumors containing elevated cytoplasmic Ape1.Oncogene advance online publication, 24 May 2010; doi:10.1038/onc.2010.178.
Date:	2010-07
Relation:	Oncogene. 2010 Jul;29(30):4330-4340.
Link to:	http://dx.doi.org/10.1038/onc.2010.178
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0950-9232&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000280547900009
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77955174568
Appears in Collections:	[Huei Lee(2009-2011)] Periodical Articles

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