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Involvement of endoplasmic reticulum stress in adenosine-induced human hepatoma HepG2 cell apoptosis

Involvement of endoplasmic reticulum stress in adenosine-induced human hepatoma HepG2 cell apoptosis Endoplasmic reticulum stress (ERS)-mediated cell apoptosis has been implicated in the development of multiple diseases such as cancer, neurodegenerative diseases and ischemic reperfusion damage. Previous studies have demonstrated the adenosine-induced apoptosis in several tumor cell lines. However, the role of ERS in adenosine-induced human hepatoma HepG2 cell apoptosis remains unclear. The present study was designed to determine whether ERS is involved in adenosine-induced HepG2 cell apoptosis. The MTT assay was used to determine proliferation, and DAPI staining of cell nuclei was performed to determine cell apoptosis. The translocation of CHOP and caspase-3 was observed by immunofluorescence analysis, and the protein expression of CHOP, caspase-4 and caspase-3 was detected by Western blotting. The MTT assay demonstrated that adenosine inhibited HepG2 cell proliferation in a dose-dependent manner. DAPI staining of cell nuclei and cell cycle analysis verified cell apoptosis. The immunofluorescence assay demonstrated that adenosine induced the translocation of CHOP and of caspase-3 from the cytoplasm to the nucleus. Western blotting confirmed that CHOP, caspase-4 and caspase-3 were up-regulated in HepG2 cells after treatment with adenosine. However, JNK protein expression was not altered. These results show that ERS is involved in the adenosine-induced HepG2 cell apoptosis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Oncology Reports Spandidos Publications

Involvement of endoplasmic reticulum stress in adenosine-induced human hepatoma HepG2 cell apoptosis

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References (69)

Publisher
Spandidos Publications
Copyright
Copyright © Spandidos Publications
ISSN
1021-335X
eISSN
1791-2431
DOI
10.3892/or.2011.1247
pmid
21479362
Publisher site
See Article on Publisher Site

Abstract

Endoplasmic reticulum stress (ERS)-mediated cell apoptosis has been implicated in the development of multiple diseases such as cancer, neurodegenerative diseases and ischemic reperfusion damage. Previous studies have demonstrated the adenosine-induced apoptosis in several tumor cell lines. However, the role of ERS in adenosine-induced human hepatoma HepG2 cell apoptosis remains unclear. The present study was designed to determine whether ERS is involved in adenosine-induced HepG2 cell apoptosis. The MTT assay was used to determine proliferation, and DAPI staining of cell nuclei was performed to determine cell apoptosis. The translocation of CHOP and caspase-3 was observed by immunofluorescence analysis, and the protein expression of CHOP, caspase-4 and caspase-3 was detected by Western blotting. The MTT assay demonstrated that adenosine inhibited HepG2 cell proliferation in a dose-dependent manner. DAPI staining of cell nuclei and cell cycle analysis verified cell apoptosis. The immunofluorescence assay demonstrated that adenosine induced the translocation of CHOP and of caspase-3 from the cytoplasm to the nucleus. Western blotting confirmed that CHOP, caspase-4 and caspase-3 were up-regulated in HepG2 cells after treatment with adenosine. However, JNK protein expression was not altered. These results show that ERS is involved in the adenosine-induced HepG2 cell apoptosis.

Journal

Oncology ReportsSpandidos Publications

Published: Jul 1, 2011

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