Project description:In this series the ocular primordium was microdissected from normal CD-1 (outbred) mouse embryos harvested days 8-10 post-coitus, corresponding to human development during the 3rd-4th weeks post-fertilization. The precise embryological age was ascertained by counting somite pairs to an accuracy of +/- 2 pairs per litter. Samples were pooled as follows: optic pit pooled from 48-50 embryos (6 litters) on 8 d.p.c. (4-8 somite pairs), optic vesicle pooled from 36-40 embryos (5 litters) on 9 d.p.c. (16-20 somite pairs), and optic cip pooled from 27-30 embryos (3 litters) on 10 d.p.c. (28-32 somite pairs). The common reference for this series was RNA collected from embryonic headfold microdissected on 8 d.p.c. RNA samples were collected from CD-1 rat embryos at equivalent somite stages for the headfold, optic vesicle, and opic cup. Keywords = embryo Keywords = eye development Keywords = mouse Keywords = rat Keywords: time-course
Project description:In this series the ocular primordium was microdissected from normal CD-1 (outbred) mouse embryos harvested days 8-10 post-coitus, corresponding to human development during the 3rd-4th weeks post-fertilization. The precise embryological age was ascertained by counting somite pairs to an accuracy of +/- 2 pairs per litter. Samples were pooled as follows: optic pit pooled from 48-50 embryos (6 litters) on 8 d.p.c. (4-8 somite pairs), optic vesicle pooled from 36-40 embryos (5 litters) on 9 d.p.c. (16-20 somite pairs), and optic cip pooled from 27-30 embryos (3 litters) on 10 d.p.c. (28-32 somite pairs). The common reference for this series was RNA collected from embryonic headfold microdissected on 8 d.p.c. RNA samples were collected from CD-1 rat embryos at equivalent somite stages for the headfold, optic vesicle, and opic cup. Keywords = embryo Keywords = eye development Keywords = mouse Keywords = rat
Project description:Mutations in Peroxidasin (PXDN) cause severe inherited eye disorders in humans, such as congenital cataract, corneal opacity, and developmental glaucoma. The role of peroxidasin during eye development is poorly understood. Here we describe the first Pxdn mouse mutant which was induced by ENU (N-ethyl-N-nitrosourea) and led to a recessive phenotype. Sequence analysis of cDNA revealed a T3816A mutation resulting in a premature stop codon (Cys1272X) in the peroxidase domain. This mutation causes severe anterior segment dysgenesis and microphthalmia resembling the manifestations in patients with PXDN mutations. The proliferation and differentiation of the lens is disrupted in association with aberrant expression of transcription factor genes (Pax6 and Foxe3) in mutant eyes. Additionally, Pxdn is involved in the consolidation of the basement membrane and lens epithelium adhesion in the ocular lens. Lens material including γ-crystallin is extruded into the anterior and posterior chamber due to local loss of structural integrity of the lens capsule as a secondary damage to the anterior segment development leading to congenital ocular inflammation. Moreover, Pxdn mutants exhibited an early-onset glaucoma and progressive retinal dysgenesis. Transcriptome profiling revealed that peroxidasin affects the transcription of developmental and eye diseases-related genes at early eye development. These findings suggest that peroxidasin is necessary for cell proliferation and differentiation and for basement membrane consolidation during eye development. Our studies provide pathogenic mechanisms of PXDN mutation-induced congenital eye diseases.
Project description:Here, we presented an atlas of region resolved proteome and lipidome of mouse eye. The multiphoton microscopy-guided laser microdissection combined with in depth label-free proteomics, enable us to identify 13,536 proteins in 11 regions of mouse eye. Further integrative analysis of label-free proteome and imaging mass spectrometry (IMS), visually revealed the distinctive molecular features, including proteins, lipids, and glycans of various anatomical mouse eye regions. This work presented the panoramic eye proteome map, and served as the rich resource for eye researches in the future.
Project description:Signals from the lens regulate multiple aspects of eye development, including establishment of eye size, patterning of the presumptive iris and ciliary body in the anterior optic cup and migration and differentiation of neural crest cells. To advance understanding of the molecular regulation of eye development by the lens, we performed transcriptome analysis of lens-removed and contralateral unoperated embryonic chicken eyes. Lens-regulated genes implicated in periocular mesenchyme, cornea and anterior optic cup development were identified. Identified candidates included genes known to be regulated by lens-derived signals and important for anterior eye development, including WNT pathway genes. Factors not previously implicated in eye development also were identified, paving the way for additional research in this area. Genes associated with nervous system development were upregulated in lens-removed eyes, but the presumptive ciliary body and iris region did not adopt a neural retina identity following lens removal. Intriguingly, transcriptomic differences were identified in retinas from male versus female chicken embryos, suggesting sexual dimorphism from early stages. These analyses have identified candidate genes and biological pathways involved in eye development, providing avenues for new research in this area.
Project description:Gene expression profiling of zebrafish early eye development on 3 to 5 days post fertilization (dpf) Gene expression on 3 to 5 dpf eyes were compared. Each sample contains three replicates.