Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA319363 | ENA |
REPOSITORIES: ENA
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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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Project description:Microarray gene profilling indentified snoRNAs are downstream target of Amino Enhancer of Split (AES) and are essential for AML1-ETO9a induced leukemia. Amino Enhancer of Split (Aes) is strongly induced by leukemia oncogenes AML1-ETO, PML-RARα and PLZF-RARα. With a conditional AES knockout mouse model we showed that AES is essential for AML1-ETO9a indeced leukemia. We performed gene expression microarray using mouse primary AML1-ETO9a transformed AES wildtype and knockout and showed that snoRNAs were downregulated in AES knockout cells. We found that SnoRNA induction is a common mechanism shared by distinct oncogenes including AML1-ETO, MYC and MLL-AF9. Suppression of C/D box snoRNA complexes or deletion of several single C/D box snoRNAs inhibit clonogenic growth of leukemia cells. These findings suggest that enhancement of snoRNA levels is a critical mechanism of leukemic transformation.
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Project description:Fusion protein AML1-ETO resulted from t(8;21) translocation is highly related to leukemia development. We have previously shown that the expression of AE9a, a spliced form of AML1-ETO, can rapidly cause leukemia in mouse. To understand how AML1-ETO is involved in leukemia development, we used AE9a leukemia model to identify a novel AE9a interacting proteins PRMT1 (protein arginine methyltransferase 1) from primary leukemic cells expressing AE9a. To examine whether PRMT1 is involved in AE9a-mediated transcription regulation, genome wide gene expression analysis is carried out in hematopoietic cell line K562 (wild type or AE9a expressing) treated with (-) control siRNA or siPRMT1.
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