Unknown,Transcriptomics,Genomics,Proteomics

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Transcriptome of Smooth Muscle Cells, Interstitial Cells of Cajal and PDGFRα+ Cells

ABSTRACT: Genome scale expression data on absolute numbers of gene isoforms offer essential clues for cellular functions and biological processes. Gastrointestinal (GI) motility is regulated by smooth muscle cells (SMC) closely contacted with interstitial cells of Cajal (ICC) and fibroblast-like PDGFRα+ cells (PαC), forming an electrical syncytium. To uncover genetic identifies and cellular functions of the cells, we isolated these three cell populations from mouse small intestine and colon, obtained the transcriptome for each type of cells, and built each cell type transcriptome browser. To our knowledge, this is the first genetic resource providing a comprehensive reference for all mRNA transcripts expressed in these unique GI cell populations. Integration of these data with the UCSC genome browser revealed novel cell-specific markers, ion channel and transporter isoforms, and unique cellular and biological functions of these cells in GI physiology. Our transcriptome browsers bring new insight into the alternative expression of genes in different types of the cells and provides references for future functional studies. mRNA profiles of SMC, ICC and PDGFRa cells isolated from mouse jejunum and colon were generated by deep sequencing using Illumina Hiseq2000..

ORGANISM(S): Mus musculus

SUBMITTER: Seungil Ro

PROVIDER: E-GEOD-57776 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Infections with bovine viral diarrhea virus (BVDV) contribute significantly to health-related economic losses in the beef and dairy industries and are widespread throughout the world. Severe acute BVDV infection is characterized by a gastrointestinal (GI) inflammatory response. The mechanism of inflammatory lesions caused by BVDV remains unknown. The interstitial cells of Cajal (ICC) network plays a pivotal role as a pacemaker in the generation of electrical slow waves for GI motility, and it is crucial for the reception of regulatory inputs from the enteric nervous system. The present study investigated whether ICC were a good model for studying GI inflammatory lesions caused by BVDV infection. Primary ICC were isolated from the duodenum of Merino sheep. The presence of BVDV was detected in ICC grown for five passages after BVDV infection, indicating that BVDV successfully replicated in ICC. After infection with BVDV strain TC, the cell proliferation proceeded slowly or declined. Morphological changes, including swelling, dissolution, and formation of vacuoles, of ICC were observed, pointing to quantitative, morphological and functional changes of ICC. Therefore, RNA sequencing (RNA-Seq) was performed to investigate differentially expressed genes (DEGs) in BVDV-infected ICC and to further explore the molecular mechanism of underlying quantitative, morphological and functional changes of ICC. Eight hundred six genes were differentially expressed upon BVDV infection, of which 538 genes were upregulated and 268 genes were downregulated. Gene Ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses showed that the 806 DEGs were significantly enriched in 27 pathways, including cytokine-cytokine receptor interaction, interleukin (IL)-17 signaling, mitogen-activated protein kinase (MAPK) signaling pathway. Finally, 21 DEGs were randomly selected, and the relative repression levels of these genes were tested using the quantitative real-time PCR (qRT-PCR) to validate the RNA-Seq results. The results showed that the related expression levels of 21 DEGs were similar to RNA-Seq. This study is the first to establish a new infection model for investigating GI inflammatory lesions induced by BVDV infection.

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Transcriptome of Smooth Muscle Cells, Interstitial Cells of Cajal and PDGFRα+ Cells

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