Activity levels of cathepsins B and L in tumor cells are a biomarker for efficacy of reovirus-mediated tumor cell killing

Reovirus has gained much attention as an anticancer agent; however, the mechanism of the tumor cell-specific replication of reovirus is not fully understood. Although Ras activation is known to be crucial for tumor cell-specific replication of reovirus, it remains controversial which cellular factor...

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Veröffentlicht in:Cancer gene therapy 2015-04, Vol.22 (4), p.188-197
Hauptverfasser: Terasawa, Y, Hotani, T, Katayama, Y, Tachibana, M, Mizuguchi, H, Sakurai, F
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container_end_page 197
container_issue 4
container_start_page 188
container_title Cancer gene therapy
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creator Terasawa, Y
Hotani, T
Katayama, Y
Tachibana, M
Mizuguchi, H
Sakurai, F
description Reovirus has gained much attention as an anticancer agent; however, the mechanism of the tumor cell-specific replication of reovirus is not fully understood. Although Ras activation is known to be crucial for tumor cell-specific replication of reovirus, it remains controversial which cellular factors are required for the reovirus-mediated tumor cell killing. In this study, we systematically investigated which cellular factors determined the efficiencies of reovirus-mediated tumor cell killing in various human cultured cell lines. The efficiency of reovirus-mediated cell killing varied widely among the cell lines. Junction adhesion molecule-A, a reovirus receptor, was highly expressed in almost all cell lines examined. Ras activation levels were largely different between the cell lines; however, there were no apparent correlations among the reovirus-mediated cell killing efficiencies and Ras activation status. On the other hand, activity levels of the cysteine proteases cathepsins B and L, which are crucial for proteolytic disassembly of the outer capsid proteins of reovirus, showed a tendency to be correlated with the efficiency of reovirus-mediated cell killing. These results indicate that the activity of cathepsins B and L is the most suitable as a biomarker for the efficacy of reovirus-mediated oncolysis among the factors examined in this study.
doi_str_mv 10.1038/cgt.2015.4
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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; SpringerLink Journals - AutoHoldings
subjects 631/67/1059/602
Analysis
Animals
Apoptosis
Biomarkers
Biomarkers, Tumor - metabolism
Biomedical and Life Sciences
Biomedicine
Cancer
Cancer treatment
Capsid Proteins - metabolism
Care and treatment
Cathepsin B - metabolism
Cathepsin L - metabolism
Cathepsins
Cell activation
Cell Survival
Cysteine
Cystine
Diagnosis
Enzyme Activation
Gene Expression
Gene Therapy
Genetic aspects
HEK293 Cells
Hep G2 Cells
Humans
Immunity, Innate
MCF-7 Cells
Mice
Oncolysis
original-article
Orthoreovirus, Mammalian - immunology
Orthoreovirus, Mammalian - physiology
Proteases
Proteins
Proteolysis
ras Proteins - metabolism
Reovirus
Reoviruses
Replication
RNA polymerases
RNA, Viral - genetics
RNA, Viral - metabolism
Tumor cells
Tumors
Viral proteins
Virus Attachment
Virus Internalization
title Activity levels of cathepsins B and L in tumor cells are a biomarker for efficacy of reovirus-mediated tumor cell killing
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