Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA242308 | ENA |
REPOSITORIES: ENA
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Project description:Colorectal cancer (CRC) is currently the third in cancer incidence worldwide and the fourth most common cause of cancer deaths. To discover the proteins related to colon cancer, a typical inflammation-related C57B/6N mouse colon carcinogenesis model was developed using azoxymethane-dextran sodium sulfate (AOM-DSS) treated for 14 weeks. iTRAQ-based proteomics study was performed using cell membrane components enriched from colonic mucosa. Tumor tissues and their adjacent normal colon tissues from colonic cancer patients were collected for differential protein detection and metabolomics studies. Totally, 74 differentially expressed proteins were identified in the AOM/DSS treated tumor samples compared with AOM/DSS treated adjacent samples, and the saline treated control. Bioinformatics analysis showed that eight downregulated proteins were enriched in the pathway of valine, leucine and isoleucine degradation. Targeted metabolomics study showed that valine, leucine and isoleucine was upregulated in tumor tissues compared with their adjacent normal tissues from colonic cancer patients. Further real-time PCR and western blot experiments showed that the signal pathway proteins of Hadh and ALDH2 were downregulated in colon patients (colon tumor tissues vs their adjacent colon tissues), as well as in AOM/DSS treated mouse model. In all, our study showed that the pathway of valine, leucine and isoleucine degradation was inactivation in colon cancer, and Hadh and ALDH2 were two potential biomarkers for colon cancer treatment.
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Project description:To discover possible molecular mechanisms mediated by GM-CSF that may be involved in regeneration of the colon epithelium after DSS-induced injury we performed whole-genome wide mRNA microchip analysis of isolated crypt epithelial cells from unchallenged and DSS-challenged WT and GM-CSF-/- mice. Total RNA was prepared from isolated crypts obtained from colons of GM-CSF deficient mice and WT littermates treated or untreated with 1.5%DSS for 6 days. Three biological replicates were performed for each experimental condition.
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Project description:Expression profile of colon crypts from WT and GMCSF-/- mice with or without DSS treatment
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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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