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Differential expression of cadherin-2 and cadherin-4 in the developing and adult zebrafish visual system

  • Q. LIU (a1), S.G. BABB (a2), Z.M. NOVINCE (a1), A.L. DOEDENS (a2), J. MARRS (a2) and P.A. RAYMOND (a3)...

Abstract

Cadherins are homophilic cell adhesion molecules that control development of a variety of tissues and maintenance of adult structures. Although cadherins have been implicated in the development of the brain, including the visual system, in several vertebrate species, little is known of their role in zebrafish. In this study, we examined distribution of cadherin-2 (Cdh2, N-cadherin) in the visual system of developing and adult zebrafish using both immunocytochemical and in situ hybridization methods, and we compared Cdh2 distribution to that of the previously reported and closely related cadherin-4 (Cdh4, R-cadherin). As in other vertebrates, in zebrafish embryos Cdh2 was widely expressed in the early nervous system, but its expression became more restricted as development proceeded. Cdh4 was not detectable until later in development, at about the time when the first ganglion cells are generated. Cdh2 and Cdh4 were expressed in distinct regions of developing visual structures, including the lens. We hypothesize that the differential expression of these two cadherins in developing zebrafish visual structures reflects functionally different roles in the development of the vertebrate visual system.

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Corresponding author

Address correspondence and reprint requests to: Q. Liu, Department of Biology, University of Akron, Akron, OH 44325-3908, USA. E-mail: qliu@uakron.edu

Keywords

Differential expression of cadherin-2 and cadherin-4 in the developing and adult zebrafish visual system

  • Q. LIU (a1), S.G. BABB (a2), Z.M. NOVINCE (a1), A.L. DOEDENS (a2), J. MARRS (a2) and P.A. RAYMOND (a3)...

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