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In addition, Wnt signal activation in the central retina was sufficient to induce the expression of markers of the ciliary body and iris, two tissues derived from the peripheral optic cup (OC). The expression of a dominant-negative (DN)allele of Lef1, or of a Lef1-engrailed fusion protein, led to the inhibition of expression of peripheral genes and iris hypoplasia, suggesting that canonical Wnt signaling is required for peripheral eye development. We propose that canonical Wnt signaling in the developing optic vesicle (OV) and OC plays a crucial role in determining the identity of the ciliary body and iris. Because wingless (wg) plays a similar role in the induction of peripheral eye tissues of Drosophila, these findings indicate a possible conservation of the process that patterns the photoreceptive and support structures of the eye.<\/jats:p>","DOI":"10.1242\/dev.02474","type":"journal-article","created":{"date-parts":[[2006,7,20]],"date-time":"2006-07-20T00:25:14Z","timestamp":1153355114000},"page":"3167-3177","source":"Crossref","is-referenced-by-count":137,"title":["Wnt2b\/\u03b2-catenin-mediated canonical Wnt signaling determines the peripheral fates of the chick eye"],"prefix":"10.1242","volume":"133","author":[{"given":"Seo-Hee","family":"Cho","sequence":"first","affiliation":[{"name":"Department of Genetics and Howard Hughes Medical Institute, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Constance L.","family":"Cepko","sequence":"additional","affiliation":[{"name":"Department of Genetics and Howard Hughes Medical Institute, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","reference":[{"key":"2021042612084054000_REF1","doi-asserted-by":"crossref","unstructured":"Ahmad, I., Tang, L. and Pham, H. 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