2,2 ',4,4 ',5,5 '-Hexachlorobiphenyl (PCB 153) induces degradation of adherens junction proteins and inhibits beta-catenin-dependent transcription in liver epithelial cells
Result description
In this study we analyzed the effects of 2,2´,4,4´,5,5´-hexachlorobiphenyl (PCB 153) on proteins involved in the formation of adherens junctions in WB-F344 cells. PCB 153 induced a gradual degradation of E-adherin, beta-catenin or plakoglobin proteins. PCB 153 had no effect on mRNA levels of the above mentioned proteins. PCB 153 also decreased levels of the active beta-catenin form, which is the key co-activator of Wnt-induced TCF/LEF-dependent gene expression and reduced Axin2 mRNA, a known Wnt signaling transcriptional target. Nevertheless, PCB 153 had no effect on phosphorylation of glycogen synthase kinase-3beta, which is supposed to target beta-catenin for its proteasomal degradation. Taken together, the present data suggest that PCB 153 may interfere with functions of adherens junction proteins involved in both cell-to-cell communication and intracellular signaling. Such mechanisms might be involved in the effects of non-dioxin-like PCBs contributing to liver tumor promotion.
Keywords
Polychlorinated biphenylsE-cadherinbeta-CateninAdherens junctionsCanonical Wnt signalingRat liver progenitor cells
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/68081707:_____/09:00327032
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
2,2 ',4,4 ',5,5 '-Hexachlorobiphenyl (PCB 153) induces degradation of adherens junction proteins and inhibits beta-catenin-dependent transcription in liver epithelial cells
Original language description
In this study we analyzed the effects of 2,2´,4,4´,5,5´-hexachlorobiphenyl (PCB 153) on proteins involved in the formation of adherens junctions in WB-F344 cells. PCB 153 induced a gradual degradation of E-adherin, beta-catenin or plakoglobin proteins. PCB 153 had no effect on mRNA levels of the above mentioned proteins. PCB 153 also decreased levels of the active beta-catenin form, which is the key co-activator of Wnt-induced TCF/LEF-dependent gene expression and reduced Axin2 mRNA, a known Wnt signaling transcriptional target. Nevertheless, PCB 153 had no effect on phosphorylation of glycogen synthase kinase-3beta, which is supposed to target beta-catenin for its proteasomal degradation. Taken together, the present data suggest that PCB 153 may interfere with functions of adherens junction proteins involved in both cell-to-cell communication and intracellular signaling. Such mechanisms might be involved in the effects of non-dioxin-like PCBs contributing to liver tumor promotion.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DN - Environmental impact on health
OECD FORD branch
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Result continuities
Project
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Toxicology
ISSN
0300-483X
e-ISSN
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Volume of the periodical
260
Issue of the periodical within the volume
1-3
Country of publishing house
IE - IRELAND
Number of pages
8
Pages from-to
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UT code for WoS article
000267161000013
EID of the result in the Scopus database
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Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
DN - Environmental impact on health
Year of implementation
2009