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Expression profiling of wildtype mouse cornea in development, adult, and aging

ABSTRACT: While the mouse cornea has been well characterized morphologically, the transcriptional changes have not been described in detail. To characterize the genes, pathways, and transcriptional regulators involved in mouse cornea development and aging, we isolated whole cornea from wildtype CB6 mice at several developmental timepoints and every 6 months in the adult. Corneal epithelium and stroma were isolated at one timepoint to provide insights into the genes that are unique to each tissue.

ORGANISM(S): Mus musculus

PROVIDER: GSE43155 | GEO | 2013/01/01

SECONDARY ACCESSION(S): PRJNA184734

REPOSITORIES: GEO

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Expression profiling of wildtype mouse cornea in development, adult, and aging

Project description:While the mouse cornea has been well characterized morphologically, the transcriptional changes have not been described in detail. To characterize the genes, pathways, and transcriptional regulators involved in mouse cornea development and aging, we isolated whole cornea from wildtype CB6 mice at several developmental timepoints and every 6 months in the adult. Corneal epithelium and stroma were isolated at one timepoint to provide insights into the genes that are unique to each tissue. Total RNA was purified from whole mouse cornea at 12 time points over the life of the mouse and from corneal epithelium and stroma at a single timepoint.

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Project description:PURPOSE: To provide a detailed gene expression profile of the normal postnatal mouse cornea. METHODS: Serial analysis of gene expression (SAGE) was performed on postnatal day (PN)9 and adult mouse (6 week) total corneas. The expression of selected genes was analyzed by in situ hybridization. RESULTS: A total of 64,272 PN9 and 62,206 adult tags were sequenced. Mouse corneal transcriptomes are composed of at least 19,544 and 18,509 unique mRNAs, respectively. One third of the unique tags were expressed at both stages, whereas a third was identified exclusively in PN9 or adult corneas. Three hundred thirty-four PN9 and 339 adult tags were enriched more than fivefold over other published nonocular libraries. Abundant transcripts were associated with metabolic functions, redox activities, and barrier integrity. Three members of the Ly-6/uPAR family whose functions are unknown in the cornea constitute more than 1% of the total mRNA. Aquaporin 5, epithelial membrane protein and glutathione-S-transferase (GST) omega-1, and GST alpha-4 mRNAs were preferentially expressed in distinct corneal epithelial layers, providing new markers for stratification. More than 200 tags were differentially expressed, of which 25 mediate transcription. CONCLUSIONS: In addition to providing a detailed profile of expressed genes in the PN9 and mature mouse cornea, the present SAGE data demonstrate dynamic changes in gene expression after eye opening and provide new probes for exploring corneal epithelial cell stratification, development, and function and for exploring the intricate relationship between programmed and environmentally induced gene expression in the cornea. Keywords: other

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