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Articles by Cynthia L. Webb
Total Records ( 2 ) for Cynthia L. Webb
  Vasker Bhattacherjee , Kristin H. Horn , Saurabh Singh , Cynthia L. Webb , M. Michele Pisano and Robert M. Greene
  Mutations in each of the transcriptional co-activator genes - CBP, p300, Cited2, Cart1 and Carm1 - result in neural tube defects in mice. The present study thus furnishes a complete and comparative temporal and spatial expression map of CBP/p300 and associated transcriptional co-activators, Cited2, Cart1 and Carm1 during the period of murine neural tube development (embryonic days 8.5 to 10.5). Each co-activator except Cart1 was expressed in the dorsal neural folds on E8.5. Although CBP and p300 are functionally interchangeable in vitro, their respective expression patterns diverge during embryogenesis before neural fold fusion is complete. CBP gene expression was lost from the neural folds by E8.75 and was thereafter weakly expressed in the maxillary region and limb buds, while p300 exhibited strong expression in the first branchial arch, limb bud and telencephalic regions on E9.5. Cart1 exhibited strong expression in the forebrain mesenchyme from E9.0 through E10.5. Although CBP, p300, Carm1 and Cited2 share temporal expression on E8.5, these co-activators have different spatial expression in mesenchyme and/or the neuroepithelium. Nevertheless, co-localization to the dorsal neural folds on E8.5 suggests a functional role in elevation and/or fusion of the neural folds. Target genes, and pathways that promote cranial neural tube fusion that are activated by CBP/p300/Carm1/Cited2/Cart1-containing transcriptional complexes await elucidation.
  Dennis R. Warner , Henry S. Smith , Cynthia L. Webb , Robert M. Greene and M. Michele Pisano
  Morphogenesis of the mammalian secondary palate requires coordination of cell migration, proliferation, differentiation, apoptosis and synthesis of extracellular matrix molecules by numerous signal transduction pathways. Recent evidence suggests a role for members of the Wnt family of secreted cytokines in orofacial development. However, no study has systematically or comprehensively examined the expression of Wnts in embryonic orofacial tissue. We thus conducted a survey of the expression of all known Wnt genes in the developing murine secondary palate. Using an RT-PCR strategy to assay gene expression, 12 of the 19 known members of the Wnt family were found to be expressed in embryonic palatal tissue during key phases of its development. The expression of 5 Wnt family members was found to be temporally regulated. Moreover, these Wnts had unique spatio-temporal patterns of expression which suggested possible roles in palatal ontogeny.
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