http://harvardscience.harvard.edu/stories/person/1184 Stories and external links referencing a person (RSS) en http://harvardscience.harvard.edu/medicine-health/articles/studies-show-new-players-and-patterns-vertebrate-heart-development <!--paging_filter--><p>Cell biologists have identified proteins capable of promoting heart development -- at least in frogs and birds. They report that the proteins Dkk1 and Crescent, which inhibit regulatory proteins of the Wnt family, can induce formation of a beating heart in tissue culture from <i>Xenopus laevis</i> and chick embryos. Other Wnt antagonists lacked this activity. The findings indicate that diffusion of Dkk1 and Crescent from organizer centers in the embryos initiates cardiogenesis by establishing a zone of low Wnt activity.</p> Mon, 26 Mar 2007 05:12:11 -0400 70652986 2949 at http://harvardscience.harvard.edu