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Transcriptional dynamics of endodermal organ formation
Author(s) -
Sherwood Richard I.,
Chen TzongYang Albert,
Melton Douglas A.
Publication year - 2009
Publication title -
developmental dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.634
H-Index - 141
eISSN - 1097-0177
pISSN - 1058-8388
DOI - 10.1002/dvdy.21810
Subject(s) - endoderm , biology , microbiology and biotechnology , pancreas , organogenesis , foregut , sox2 , gastrulation , embryo , transcription factor , embryogenesis , anatomy , embryonic stem cell , endocrinology , gene , genetics
Although endodermal organs including the liver, pancreas, and intestine are of significant therapeutic interest, the mechanism by which the endoderm is divided into organ domains during embryogenesis is not well understood. To better understand this process, global gene expression profiling was performed on early endodermal organ domains. This global analysis was followed up by dynamic immunofluorescence analysis of key transcription factors, uncovering novel expression patterns as well as cell surface proteins that allow prospective isolation of specific endodermal organ domains. Additionally, a repressive interaction between Cdx2 and Sox2 was found to occur at the prospective stomach–intestine border, with the hepatic and pancreatic domains forming at this boundary, and Hlxb9 was revealed to have graded expression along the dorsal–ventral axis. These results contribute to understanding the mechanism of endodermal organogenesis and should assist efforts to replicate this process using pluripotent stem cells. Developmental Dynamics 238:29–42, 2009. © 2008 Wiley‐Liss, Inc.