mortality/aging
• mice die as neonates
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vision/eye
• precursors normally fated to become amacrine and horizontal cells switch to ganglion cell fates
• although cells belonging to the outer neuroblastic layer are confined to the ventricular zone in wild-type, they tend to invade into the ganglion cell layer in mutant retinas
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• retinal explants are significantly thinner after 2 weeks of culture compared to wild-type and often exhibit substantial focal perturbations in laminar organization and rosette-like structures, however exhibit normal generation of photoreceptor cells, bipolar cells, and glial cells
• retinas at E16.5 show abnormal laminar organization
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• lack of calbindin-positive and syntaxin-positive cells in cultured retinas indicates that amacrine cells, including the displaced amacrine cells in the ganglion cell layer, are profoundly missing
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• increased number and expanded spatial localization of cells expressing the ganglion cell marker Brn3b in retinas indicating increased ganglion cell number
• precursors normally fated to become amacrine and horizontal cells switch to ganglion cell fates
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• calbindin-positive cells in the outer border of the inner nuclear layer are entirely absent in cultured retinas, indicating complete loss of horizontal cells
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• the ganglion cell layer is significantly thicker
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• by E18.5, the inner plexiform layer is absent
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• reduced expression of horizontal cell (HC) marker Lim1 at age E14.5
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nervous system
• lack of calbindin-positive and syntaxin-positive cells in cultured retinas indicates that amacrine cells, including the displaced amacrine cells in the ganglion cell layer, are profoundly missing
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• increased number and expanded spatial localization of cells expressing the ganglion cell marker Brn3b in retinas indicating increased ganglion cell number
• precursors normally fated to become amacrine and horizontal cells switch to ganglion cell fates
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• calbindin-positive cells in the outer border of the inner nuclear layer are entirely absent in cultured retinas, indicating complete loss of horizontal cells
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endocrine/exocrine glands
• neonates have no pancreas
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