Expression analysis of the chicken homologue of CITED2 during early stages of embryonic development.
Members of the Cited family are nuclear transactivators which bind to the coactivators p300 and CBP. While Cited1 also binds to the TGFbeta signal transducer Smad4, this has not been shown for Cited2. We isolated a chicken homologue of Cited2 from a HH stage 3-6 cDNA library and examined its expression pattern during early stages of embryonic development by whole-mount in situ hybridization. CITED2 expression is detectable in the epiblast as early as stage XI. From HH stage 2 onwards CITED2 is expressed in an anterior domain in the elongating primitive streak in cells which are fated to become heart. During gastrulation the expression pattern is highly dynamic and transiently displays left-right asymmetry with stronger expression on the right side. CITED2 expression appears at multiple sites of forming mesodermal structures. Most prominently, CITED2 is expressed in presomitic and lateral plate mesoderm, in the headfold (future forebrain), the head mesoderm, the pharyngeal floor, the ventral blood islands, somitomeres and the intermediate mesoderm which gives rise to the kidney anlagen.[1]References
- Expression analysis of the chicken homologue of CITED2 during early stages of embryonic development. Schlange, T., Andrée, B., Arnold, H., Brand, T. Mech. Dev. (2000) [Pubmed]
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