Document Detail

Differentiation and migration of endoderm in the rat and mouse at implantation.
MedLine Citation:
PMID:  626417     Owner:  NLM     Status:  MEDLINE    
The initial differentiation of endoderm at the time of onset of implantation, and the subsequent rapid differentiation of visceral and parietal endoderm were studied in the rat and mouse. Transmission electron microscopy illustrates the reorientation and loosening of embryonic cell mass cells during implantation, as well as cytological evidence that endoderm cells have differentiated. Using scanning electron microscopy, parietal endoderm consists of individual stellate cells with numerous peripheral branching filopodia. As these cells migrate abembryonically, the rest of the embryonic cell mass becomes recompacted. The visceral endoderm proliferates and forms a columnar epithelium which has the cytological characteristic of an absorptive epithelium and is able to ingest exogenous proteins. Thus, by 24 hours after implantation, the two endodermal derivatives have assumed widely diverse shapes and different types of associations and rates of replication, and are probably performing different functions.
A C Enders; R L Given; S Schlafke
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Anatomical record     Volume:  190     ISSN:  0003-276X     ISO Abbreviation:  Anat. Rec.     Publication Date:  1978 Jan 
Date Detail:
Created Date:  1978-04-17     Completed Date:  1978-04-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370540     Medline TA:  Anat Rec     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  65-77     Citation Subset:  IM    
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MeSH Terms
Blastocyst / cytology
Cell Differentiation
Cell Movement
Embryo Implantation*
Endoderm / cytology*
Horseradish Peroxidase / metabolism
Microscopy, Electron
Microscopy, Electron, Scanning
Reg. No./Substance:
EC 1.11.1.-/Horseradish Peroxidase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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