| Cell fate and differentiation of the developing ocular lens. | |
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MedLine Citation:
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PMID: 19834024 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: Even though zebrafish development does not include the formation of a lens vesicle, the authors' hypothesis is that the processes of cell differentiation are similar in zebrafish and mammals and determine cell fates in the lens. METHODS: Two-photon live embryo imaging was used to follow individual fluorescently labeled cells in real-time from the placode stage at 16 hours postfertilization (hpf) until obvious morphologic differentiation into epithelium or fiber cells had occurred at approximately 28 hpf. Immunohistochemistry was used to label proliferating, differentiating, and apoptotic cells. RESULTS: Similar to the mammal, cells in the teleost peripheral lens placode migrated to the anterior lens mass and differentiated into an anterior epithelium. Cells in the central lens placode migrated to the posterior lens mass and differentiated into primary fiber cells. Anterior and posterior polarization in the zebrafish lens mass was similar to mammalian lens vesicle polarization. Primary fiber cell differentiation was apparent at approximately 21 hpf, before separation of the lens from the surface ectoderm, as evidenced by cell elongation, exit from the cell cycle, and expression of Zl-1, a marker for fiber differentiation. TUNEL labeling demonstrated that apoptosis was not a primary mechanism for lens separation from the surface ectoderm. CONCLUSIONS: Despite the absence of a lens vesicle in the zebrafish embryo, lens organogenesis appears to be well conserved among vertebrates. Results using three-dimensional live embryo imaging of zebrafish development showed minimal differences and strong similarities in the fate of cells in the zebrafish and mammalian lens placode. |
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Authors:
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Teri M S Greiling; Masamoto Aose; John I Clark |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2009-10-15 |
Journal Detail:
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Title: Investigative ophthalmology & visual science Volume: 51 ISSN: 1552-5783 ISO Abbreviation: Invest. Ophthalmol. Vis. Sci. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-02-26 Completed Date: 2010-03-26 Revised Date: 2010-09-02 |
Medline Journal Info:
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Nlm Unique ID: 7703701 Medline TA: Invest Ophthalmol Vis Sci Country: United States |
Other Details:
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Languages: eng Pagination: 1540-6 Citation Subset: IM |
Affiliation:
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Department of Biological Structure, University of Washington, Seattle, Washington 98195-7420, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Apoptosis / physiology Cell Differentiation / physiology* Cell Movement / physiology Cell Proliferation Epithelial Cells / cytology* In Situ Nick-End Labeling Lens, Crystalline / cytology*, embryology* Microscopy, Fluorescence, Multiphoton / methods Organogenesis / physiology* Zebrafish / embryology* |
| Grant Support | |
ID/Acronym/Agency:
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EY04542/EY/NEI NIH HHS; EY07031/EY/NEI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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