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- W2896844749 abstract "ABSTRACT The mammalian ciliary margin is a part of the developing peripheral neural retina that differentiates into the ciliary body and the iris. Canonical WNT signaling plays a critical role in the specification of the ciliary margin at the peripheral retina in the presence of strong FGF signaling in the central retina. The mechanism of how the boundary between the central retina and the ciliary margin is created has not been previously elucidated. Using genetic ablation and epistasis experiments, we show that loss of FGF signaling gradient in the peripheral retina causes expansion of WNT signaling towards the central retina thereby disrupting the neurogenic boundary and compartmentalization of the ciliary margin. Loss of WNT signaling displays a complimentary effect with expansion of FGF signaling into the ciliary marginal space. Using in vivo experiments, we elucidate the FGF signaling cascade involved in development of the ciliary margin. We also identify the surface ectoderm as the source of WNT ligands in eliciting WNT response at the ciliary margin. We show that an interaction between FGF and WNT signaling is required for generation of the ciliary marginal cells. Taken together, our results reveal that a gradient intersection of FGF and WNT signaling is required for specification of the ciliary margin." @default.
- W2896844749 created "2018-10-26" @default.
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- W2896844749 date "2018-10-16" @default.
- W2896844749 modified "2023-09-26" @default.
- W2896844749 title "Deficient FGF signaling in the developing peripheral retina disrupts ciliary margin development and causes aniridia" @default.
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- W2896844749 doi "https://doi.org/10.1101/443416" @default.
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