| Ontogeny of cone photoreceptor mosaics in zebrafish. | |
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MedLine Citation:
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PMID: 20878782 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cone photoreceptors in fish are typically arranged into a precise, reiterated pattern known as a "cone mosaic." Cone mosaic patterns can vary in different fish species and in response to changes in habitat, yet their function and the mechanisms of their development remain speculative. Zebrafish (Danio rerio) have four cone subtypes arranged into precise rows in the adult retina. Here we describe larval zebrafish cone patterns and investigate a previously unrecognized transition between larval and adult cone mosaic patterns. Cone positions were determined in transgenic zebrafish expressing green fluorescent protein (GFP) in their UV-sensitive cones, by the use of multiplex in situ hybridization labelling of various cone opsins. We developed a "mosaic metric" statistical tool to measure local cone order. We found that ratios of the various cone subtypes in larval and adult zebrafish were statistically different. The cone photoreceptors in larvae form a regular heterotypic mosaic array; i.e., the position of any one cone spectral subtype relative to the other cone subtypes is statistically different from random. However, the cone spectral subtypes in larval zebrafish are not arranged in continuous rows as in the adult. We used cell birth dating to show that the larval cone mosaic pattern remains as a distinct region within the adult retina and does not reorganize into the adult row pattern. In addition, the abundance of cone subtypes relative to other subtypes is different in this larval remnant compared with that of larvae or canonical adult zebrafish retina. These observations provide baseline data for understanding the development of cone mosaics via comparative analysis of larval and adult cone development in a model species. |
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Authors:
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W Ted Allison; Linda K Barthel; Kristina M Skebo; Masaki Takechi; Shoji Kawamura; Pamela A Raymond |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of comparative neurology Volume: 518 ISSN: 1096-9861 ISO Abbreviation: J. Comp. Neurol. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-29 Completed Date: 2011-01-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0406041 Medline TA: J Comp Neurol Country: United States |
Other Details:
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Languages: eng Pagination: 4182-95 Citation Subset: IM |
Affiliation:
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Departments of Biological Sciences and Medical Genetics, University of Alberta, Edmonton, Alberta, Canada. ted.allison@ualberta.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Animals, Genetically Modified Cell Differentiation Green Fluorescent Proteins / genetics, metabolism Larva / anatomy & histology*, physiology Opsins / genetics, metabolism Retina* / anatomy & histology, growth & development Retinal Cone Photoreceptor Cells / cytology*, physiology Zebrafish / anatomy & histology*, genetics, growth & development* |
| Grant Support | |
ID/Acronym/Agency:
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R01 EY015509/EY/NEI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Opsins; 147336-22-9/Green Fluorescent Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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