Ontogenetic expression of the Otx2 and Crx homeobox genes in the retina of the rat
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Ontogenetic expression of the Otx2 and Crx homeobox genes in the retina of the rat. / Rath, Martin F; Morin, Fabrice; Shi, Qiong; Klein, David C; Møller, Morten.
I: Experimental Eye Research, Bind 85, Nr. 1, 01.07.2007, s. 65-73.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Ontogenetic expression of the Otx2 and Crx homeobox genes in the retina of the rat
AU - Rath, Martin F
AU - Morin, Fabrice
AU - Shi, Qiong
AU - Klein, David C
AU - Møller, Morten
N1 - Paper id:: PMID: 17467693
PY - 2007/7/1
Y1 - 2007/7/1
N2 - Otx2 and Crx are vertebrate orthologs of the orthodenticle family of homeobox genes, which are involved in retinal development. In this study, the temporal expression patterns of Otx2 and Crx in the rat retina during embryonic and postnatal stages of development were analyzed in detail. This confirmed the presence of Otx2 mRNA in both the embryonic retinal pigment epithelium and the developing neural retina. During development, the expression of Otx2 persists in the pigment epithelium, whereas Otx2 expression of the neural retina becomes progressively restricted to the outer nuclear layer and the outer part of the inner nuclear layer. Immunohistochemistry revealed that Otx2 protein is also present in cell bodies of the ganglion cell layer, which does not contain the Otx2 transcript, suggesting that Otx2 protein is synthesized in cell bodies of the bipolar neurons and then transported to and taken up by cells in the ganglion cell layer. Crx is also highly expressed in the outer nuclear layer starting at E17 and postnatally in the inner nuclear layer. The onset of expression of Crx lags behind that of Otx2 consistent with evidence that Otx2 activates Crx transcription. These expression patterns are consistent with evidence that Otx2 and Crx function during retinal development and extend the period of probable functionality to the adult. In this regard, these results provide an enhanced and expanded temporal and spatial framework for understanding the multiple roles of Otx2 and Crx in the developing and mature mammalian retina.
AB - Otx2 and Crx are vertebrate orthologs of the orthodenticle family of homeobox genes, which are involved in retinal development. In this study, the temporal expression patterns of Otx2 and Crx in the rat retina during embryonic and postnatal stages of development were analyzed in detail. This confirmed the presence of Otx2 mRNA in both the embryonic retinal pigment epithelium and the developing neural retina. During development, the expression of Otx2 persists in the pigment epithelium, whereas Otx2 expression of the neural retina becomes progressively restricted to the outer nuclear layer and the outer part of the inner nuclear layer. Immunohistochemistry revealed that Otx2 protein is also present in cell bodies of the ganglion cell layer, which does not contain the Otx2 transcript, suggesting that Otx2 protein is synthesized in cell bodies of the bipolar neurons and then transported to and taken up by cells in the ganglion cell layer. Crx is also highly expressed in the outer nuclear layer starting at E17 and postnatally in the inner nuclear layer. The onset of expression of Crx lags behind that of Otx2 consistent with evidence that Otx2 activates Crx transcription. These expression patterns are consistent with evidence that Otx2 and Crx function during retinal development and extend the period of probable functionality to the adult. In this regard, these results provide an enhanced and expanded temporal and spatial framework for understanding the multiple roles of Otx2 and Crx in the developing and mature mammalian retina.
KW - Animals
KW - Blotting, Western
KW - Densitometry
KW - Eye Proteins
KW - Gene Expression Regulation, Developmental
KW - Genes, Homeobox
KW - Homeodomain Proteins
KW - Hypothalamus
KW - Immunohistochemistry
KW - In Situ Hybridization
KW - Neurons
KW - Otx Transcription Factors
KW - Pigment Epithelium of Eye
KW - RNA, Messenger
KW - Rats
KW - Rats, Sprague-Dawley
KW - Retina
KW - Retinal Ganglion Cells
KW - Trans-Activators
KW - Transcription, Genetic
U2 - 10.1016/j.exer.2007.02.016
DO - 10.1016/j.exer.2007.02.016
M3 - Journal article
C2 - 17467693
VL - 85
SP - 65
EP - 73
JO - Experimental Eye Research
JF - Experimental Eye Research
SN - 0014-4835
IS - 1
ER -
ID: 18315916