Overexpression of Lon contributes to survival and aggressive phenotype of cancer cells through mitochondrial complex I-mediated generation of reactive oxygen species

Lon protease is a multifunction protein and operates in protein quality control and stress response pathways in mitochondria. Human Lon is upregulated under oxidative and hypoxic stresses that represent the stress phenotypes of cancer. However, little literature undertakes comprehensive and detailed...

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Veröffentlicht in:Cell death & disease 2013-06, Vol.4 (6), p.e681-e681
Hauptverfasser: Cheng, C-W, Kuo, C-Y, Fan, C-C, Fang, W-C, Jiang, S S, Lo, Y-K, Wang, T-Y, Kao, M-C, Lee, A Y-L
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container_end_page e681
container_issue 6
container_start_page e681
container_title Cell death & disease
container_volume 4
creator Cheng, C-W
Kuo, C-Y
Fan, C-C
Fang, W-C
Jiang, S S
Lo, Y-K
Wang, T-Y
Kao, M-C
Lee, A Y-L
description Lon protease is a multifunction protein and operates in protein quality control and stress response pathways in mitochondria. Human Lon is upregulated under oxidative and hypoxic stresses that represent the stress phenotypes of cancer. However, little literature undertakes comprehensive and detailed investigations on the tumorigenic role of Lon. Overexpression of Lon promotes cell proliferation, apoptotic resistance to stresses, and transformation. Furthermore, Lon overexpression induces the production of mitochondrial reactive oxygen species (ROS) that result from Lon-mediated upregulation of NDUFS8, a mitochondrial Fe-S protein in complex I of electron transport chain. Increased level of mitochondrial ROS promotes cell proliferation, cell survival, cell migration, and epithelial–mesenchymal transition through mitogen-activated protein kinase (MAPK) and Ras-ERK activation. Overall, the present report for the first time demonstrates the role of Lon overexpression in tumorigenesis. Lon overexpression gives an apoptotic resistance to stresses and induces mitochondrial ROS production through Complex I as signaling molecules to activate Ras and MAPK signaling, giving the survival advantages and adaptation to cancer cells. Finally, in silico and immunohistochemistry analysis showed that Lon is overexpressed specifically in various types of cancer tissue including oral cancer.
doi_str_mv 10.1038/cddis.2013.204
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disease</jtitle><stitle>Cell Death Dis</stitle><addtitle>Cell Death Dis</addtitle><date>2013-06-01</date><risdate>2013</risdate><volume>4</volume><issue>6</issue><spage>e681</spage><epage>e681</epage><pages>e681-e681</pages><issn>2041-4889</issn><eissn>2041-4889</eissn><abstract>Lon protease is a multifunction protein and operates in protein quality control and stress response pathways in mitochondria. Human Lon is upregulated under oxidative and hypoxic stresses that represent the stress phenotypes of cancer. However, little literature undertakes comprehensive and detailed investigations on the tumorigenic role of Lon. Overexpression of Lon promotes cell proliferation, apoptotic resistance to stresses, and transformation. Furthermore, Lon overexpression induces the production of mitochondrial reactive oxygen species (ROS) that result from Lon-mediated upregulation of NDUFS8, a mitochondrial Fe-S protein in complex I of electron transport chain. Increased level of mitochondrial ROS promotes cell proliferation, cell survival, cell migration, and epithelial–mesenchymal transition through mitogen-activated protein kinase (MAPK) and Ras-ERK activation. Overall, the present report for the first time demonstrates the role of Lon overexpression in tumorigenesis. Lon overexpression gives an apoptotic resistance to stresses and induces mitochondrial ROS production through Complex I as signaling molecules to activate Ras and MAPK signaling, giving the survival advantages and adaptation to cancer cells. Finally, in silico and immunohistochemistry analysis showed that Lon is overexpressed specifically in various types of cancer tissue including oral cancer.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>23788038</pmid><doi>10.1038/cddis.2013.204</doi><oa>free_for_read</oa></addata></record>
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subjects 631/67/2327
631/80/82/23
692/420
Antibodies
Biochemistry
Biomedical and Life Sciences
Carcinogenesis - metabolism
Carcinoma, Squamous Cell - enzymology
Cell Biology
Cell Culture
Cell Line, Tumor
Cell Movement
Cell Proliferation
Cell Survival
Enzyme Stability
Epithelial-Mesenchymal Transition
Gene Expression
HEK293 Cells
Humans
Immunology
Life Sciences
MAP Kinase Signaling System
Mitochondria - enzymology
Mouth Neoplasms - enzymology
NADH Dehydrogenase - metabolism
Original
original-article
Phenotype
Protease La - genetics
Protease La - metabolism
Superoxides - metabolism
Up-Regulation
title Overexpression of Lon contributes to survival and aggressive phenotype of cancer cells through mitochondrial complex I-mediated generation of reactive oxygen species
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