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David, R.* ; Brenner, C.* ; Stieber, J.* ; Schwarz, F.* ; Brunner, S.* ; Vollmer, M. ; Mentele, E.* ; Müller-Höcker, J.* ; Kitajima, S.* ; Lickert, H. ; Rupp, R.* ; Franz, W.M.*

MesP1 drives vertebrate cardiovascular differentiation through Dkk-1-mediated blockade of Wnt-signalling.

Nat. Cell Biol. 10, 338-345 (2008)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
ES-cell-based cardiovascular repair requires an in-depth understanding of the molecular mechanisms underlying the differentiation of cardiovascular ES cells. A candidate cardiovascular-fate inducer is the bHLH transcription factor MesP1. As one of the earliest markers, it is expressed specifically in almost all cardiovascular precursors and is required for cardiac morphogenesis. Here we show that MesP1 is a key factor sufficient to induce the formation of ectopic heart tissue in vertebrates and increase cardiovasculogenesis by ES cells. Electrophysiological analysis showed all subtypes of cardiac ES-cell differentiation. MesP1 overexpression and knockdown experiments revealed a prominent function of MesP1 in a gene regulatory cascade, causing Dkk-1-mediated blockade of canonical Wnt-signalling. Independent evidence from ChIP and in vitro DNA-binding studies, expression analysis in wild-type and MesP knockout mice, and reporter assays confirm that Dkk-1 is a direct target of MesP1. Further analysis of the regulatory networks involving MesP1 will be required to preprogramme ES cells towards a cardiovascular fate for cell therapy and cardiovascular tissue engineering. This may also provide a tool to elicit cardiac transdifferentiation in native human adult stem cells.
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Publication type Article: Journal article
Document type Scientific Article
Keywords embryonic stem-cells; heart precursor cells; in-vitro; cardiac mesoderm; xenopus-laevis; cardiomyocytes; specification; gene; cardiomyogenesis; cardiogenesis
ISSN (print) / ISBN 1465-7392
e-ISSN 1476-4679
Journal Nature Cell Biology
Quellenangaben Volume: 10, Issue: 3, Pages: 338-345 Article Number: , Supplement: ,
Publisher Nature Publishing Group
Reviewing status Peer reviewed
Institute(s) Institute of Stem Cell Research (ISF)