| Nkx2.5-negative myocardium of the posterior heart field and its correlation with podoplanin expression in cells from the developing cardiac pacemaking and conduction system. | |
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MedLine Citation:
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PMID: 17441204 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Recent advances in the study of cardiac development have shown the relevance of addition of myocardium to the primary myocardial heart tube. In wild-type mouse embryos (E9.5-15.5), we have studied the myocardium at the venous pole of the heart using immunohistochemistry and 3D reconstructions of expression patterns of MLC-2a, Nkx2.5, and podoplanin, a novel coelomic and myocardial marker. Podoplanin-positive coelomic epithelium was continuous with adjacent podoplanin- and MLC-2a-positive myocardium that formed a conspicuous band along the left cardinal vein extending through the base of the atrial septum to the posterior myocardium of the atrioventricular canal, the atrioventricular nodal region, and the His-Purkinje system. Later on, podoplanin expression was also found in the myocardium surrounding the pulmonary vein. On the right side, podoplanin-positive cells were seen along the right cardinal vein, which during development persisted in the sinoatrial node and part of the venous valves. In the MLC-2a- and podoplanin-positive myocardium, Nkx2.5 expression was absent in the sinoatrial node and the wall of the cardinal veins. There was a mosaic positivity in the wall of the common pulmonary vein and the atrioventricular conduction system as opposed to the overall Nkx2.5 expression seen in the chamber myocardium. We conclude that we have found podoplanin as a marker that links a novel Nkx2.5-negative sinus venosus myocardial area, which we refer to as the posterior heart field, with the cardiac conduction system. |
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Authors:
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Adriana C Gittenberger-de Groot; Edris A F Mahtab; Nathan D Hahurij; Lambertus J Wisse; Marco C Deruiter; Maurits C E F Wijffels; Robert E Poelmann |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Anatomical record (Hoboken, N.J. : 2007) Volume: 290 ISSN: 1932-8486 ISO Abbreviation: Anat Rec (Hoboken) Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2007-04-18 Completed Date: 2007-05-31 Revised Date: 2009-12-16 |
Medline Journal Info:
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Nlm Unique ID: 101292775 Medline TA: Anat Rec (Hoboken) Country: United States |
Other Details:
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Languages: eng Pagination: 115-22 Citation Subset: IM |
Copyright Information:
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c 2006 Wiley-Liss, Inc. |
Affiliation:
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Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands. acgitten@lumc.nl |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cardiac Myosins / genetics, metabolism Embryonic Development Gene Expression Regulation, Developmental Heart / embryology* Heart Conduction System / cytology, metabolism* Homeodomain Proteins / genetics, metabolism* Image Processing, Computer-Assisted Membrane Glycoproteins / genetics, metabolism* Mice Mice, Inbred Strains Myocardium / cytology, metabolism* Myosin Light Chains / genetics, metabolism Sinoatrial Node / cytology, metabolism* Transcription Factors / genetics, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Gp38 protein, mouse; 0/Homeodomain Proteins; 0/Membrane Glycoproteins; 0/Myosin Light Chains; 0/Nkx2-5 protein, mouse; 0/Transcription Factors; 0/myosin light chain 2; EC 3.6.1.-/Cardiac Myosins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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