Abstract
Although Wingless (Wg)/Wnt signaling has been implicated in heart development of multiple organisms, conflicting results have been reported regarding the role of Wnt/beta-catenin pathway in cardiac myogenesis: Wg/armadillo signaling promotes heart development in Drosophila, whereas activation of Wnt/beta-catenin signaling inhibits heart formation in avians and amphibians. Using an in vitro system of mouse ES cell differentiation into cardiomyocytes, we show here that Wnt/beta-catenin signaling exhibits developmental stage-specific, biphasic, and antagonistic effects on cardiomyogenesis and hematopoiesis/vasculogenesis. Activation of the Wnt/beta-catenin pathway in the early phase during embryoid body (EB) formation enhances ES cell differentiation into cardiomyocytes while suppressing the differentiation into hematopoietic and vascular cell lineages. In contrast, activation of Wnt/beta-catenin signaling in the late phase after EB formation inhibits cardiomyocyte differentiation and enhances the expression of hematopoietic/vascular marker genes through suppression of bone morphogenetic protein signaling. Thus, Wnt/beta-catenin signaling exhibits biphasic and antagonistic effects on cardiomyogenesis and hematopoiesis/vasculogenesis, depending on the stage of development.
MeSH Terms
Animals
Bone Morphogenetic Proteins/genetics
Cell Differentiation
Cells, Cultured
Embryonic Stem Cells/cytology,metabolism
Gene Expression Regulation, Developmental
Hematopoiesis
Humans
Mice
Myocytes, Cardiac/cytology,metabolism
Signal Transduction
Time Factors
Wnt Proteins/genetics,metabolism
beta Catenin/metabolism
Chemicals
Bone Morphogenetic Proteins
Wnt Proteins
beta Catenin
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
Naito Atsuhiko T
Department of Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
Shiojima Ichiro
Akazawa Hiroshi
Hidaka Kyoko
Morisaki Takayuki
Kikuchi Akira
Komuro Issei
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