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Reactive oxygen species and Wnt signaling crosstalk patterns mouse extraembryonic endoderm.
MedLine Citation:
PMID:  22884502     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Primitive endoderm formation from the inner cell mass is one of the earliest known cell fate decisions made in the mouse embryo. The mechanisms involved in orchestrating this process are not fully understood and are difficult to study in vivo. The F9 teratocarcinoma cell line is an in vitro model used to circumvent many technical problems surrounding the study of extraembryonic endoderm differentiation. F9 cells treated with retinoic acid differentiate to primitive endoderm and this is accompanied by the activation of canonical Wnt-β-catenin signaling. Reactive oxygen species can modulate this signaling pathway Funato et al. [1], but whether they are sufficient to induce extraembryonic endoderm in vitro is not known. In the present study, a sustained increase in ROS levels was found in retinoic acid-treated F9 cells. An increase in Tcf-Lef transcriptional activity, a read out of Wnt-β-catenin signaling, was also seen in response to exogenous H(2)O(2). Analysis from immunoblots, immunocytochemistry and real time PCR revealed the presence of markers of differentiation and a reduction in the expression of a marker of proliferation, confirming that H(2)O(2)-treated F9 cells developed into primitive endoderm. In contrast, exposing retinoic acid-treated cells to antioxidants impeded differentiation. Real time PCR was also used to identify candidates responsible for the observed elevation in ROS production. Results indicated that the NADPH oxidase 1, 2, 3 and 4 and Duox2 genes were RA responsive. Furthermore, the NADPH oxidase inhibitor, diphenyleneiodonium chloride was shown to attenuate primitive endoderm formation. Together, these results shed new light on how early mouse embryogenesis might be influenced by the crosstalk involving ROS and the Wnt-β-catenin signaling pathway.
Authors:
Jason W H Wen; Jason T K Hwang; Gregory M Kelly
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-3
Journal Detail:
Title:  Cellular signalling     Volume:  -     ISSN:  1873-3913     ISO Abbreviation:  Cell. Signal.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8904683     Medline TA:  Cell Signal     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
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