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Int J Dev Biol 2007 Jan 01;512:161-5. doi: 10.1387/ijdb.062185jh.
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Expression of Bmp ligands and receptors in the developing Xenopus retina.

Bone morphogenetic proteins (BMPs) act repeatedly in the development of nervous system tissues. While BMP signaling is critical for the early growth and patterning of the eye, we are interested in possible later functions of BMPs in the morphological development of retinal neurons and formation of synaptic connections. Therefore, we conducted an in situ hybridization analysis of the mRNA expression for the ligands Bmp2, -4 and 7 and the type Ia, Ib and II receptors (BmprIa, BmprIb and BmprII) during development of the retina of Xenopus laevis. Bmp4 mRNA is expressed in the dorsal retina and Bmp7 in the distal peripheral retina during the period of cell differentiation, while Bmp2 is not present in the eye. The type I receptors are expressed predominantly ventrally, from the optic vesicle stage until at least stage 35/36, after most cells have differentiated and many synaptic connections have formed. BmprII mRNA, however, is distributed evenly across the dorsoventral axis, with highest expression in retinal ganglion cell and inner nuclear layers.

PubMed ID: 17294367
Article link: Int J Dev Biol

Species referenced: Xenopus laevis
Genes referenced: acvr1 acvr2a bmp2 bmp4 bmp7.1 bmp7.2 bmpr1a bmpr1b bmpr2 isl1 nin rpe

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