Journal article
TGF-β3-Mediated tissue interaction during embryonic heart development
Molecular reproduction and development, Vol.32(2), pp.152-159
06/1992
DOI: 10.1002/mrd.1080320211
PMID: 1637553
Abstract
A critical process during early heart development is the formation of mesenchymal cells which will contribute to valves and septa of the mature heart. These cells arise by an epithelial-mesenchymal transformation of endothelial cells in the atrioventricular (AV) canal and outflow tract areas of the heart. Adjacent endothelial cells in the atrium and ventricle remain epithelial. A three-dimensional collagen gel culture system has been exploited to examine the interactions that mediate this transformation. The AV canal myocardium produces a stimulus that is transmitted through an intervening extracellular matrix to the AV canal endothelium. This interaction is regionally specific, such that ventricular myocardium does not provide an adequate stimulus and ventricular endothelium does not respond to the AV canal myocardial stimulus. Exogenous TGF-beta 1 (or TGF-beta 2) can complement ventricular myocardium to produce transformation by AV canal endothelium. A blocking antibody, effective against several TGF-beta, prevents cell transformation. To identify the specific member of the TGF-beta family that functions in situ, antisense oligonucleotides for each of the numbered TGF-beta were topically added to AV canal explant cultures. Only the oligonucleotide targeted to TGF-beta 3 was an effective inhibitor of mesenchymal cell formation. Studies have been undertaken to localize specific mRNas by in situ hybridization and RNase protection assays. These assays have concentrated on the regional and temporal appearance of TGF-beta 2 and 3. Surprisingly, RNase protection assays with a TGF-beta 3 sense probe showed the presence of a transcript complementary to TGF-beta 3.
Details
- Title: Subtitle
- TGF-β3-Mediated tissue interaction during embryonic heart development
- Creators
- Raymond B Runyan - Department of Anatomy, University of Iowa, Iowa City 52242Jay D PottsDaniel L Weeks
- Resource Type
- Journal article
- Publication Details
- Molecular reproduction and development, Vol.32(2), pp.152-159
- Publisher
- United States
- DOI
- 10.1002/mrd.1080320211
- PMID
- 1637553
- ISSN
- 1040-452X
- eISSN
- 1098-2795
- Grant note
- HL 38649 / NHLBI NIH HHS HL 42266 / NHLBI NIH HHS
- Language
- English
- Date published
- 06/1992
- Academic Unit
- Stead Family Department of Pediatrics; Biochemistry and Molecular Biology
- Record Identifier
- 9984024519702771
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