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Generation of an enteric smooth muscle cell line from pig ileum

ABSTRACT: The goal of this study was to characterize a single-cell clone derived from pig ileum epithelium. Analyses including RNA-seq demonstrated that this clone was derived from an enteric smooth muscle cell. This clone is named PIC7 in the manuscript.

ORGANISM(S): Sus scrofa

PROVIDER: GSE147822 | GEO | 2020/04/29

REPOSITORIES: GEO

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Generation of an enteric smooth muscle cell line from pig ileum

Project description:Generation of an enteric smooth muscle cell line from pig ileum

| PRJNA621635 | ENA

Generation of an enteric smooth muscle cell line from the pig ileum.

Project description:Smooth muscle cells (SMCs) play an important role in physiology and production in farm animals such as pigs. Here, we report the generation of a pig SMC line. Our original objective was to establish an enteroendocrine cell line from the pig ileum epithelium through lentiviral transduction of the Simian Virus (SV) 40 large T antigen. However, an initial expression analysis of marker genes in nine cell clones revealed that none of them were enteroendocrine cells or absorptive enterocytes, goblet cells, or Paneth cells, some of the major cell types existing in the ileum epithelium. A more detailed characterization of one clone named PIC7 by RNA-seq showed that these cells expressed many of the known smooth muscle-specific or -enriched genes, including smooth muscle actin alpha 2, calponin 1, calponin 3, myosin heavy chain 11, myosin light chain kinase, smoothelin, tenascin C, transgelin, tropomyosin 1, and tropomyosin 2. Both quantitative PCR and RNA-seq analyses showed that the PIC7 cells had a high expression of mRNA for smooth muscle actin gamma 2, also known as enteric smooth muscle actin. A Western blot analysis confirmed the expression of SV40 T antigen in the PIC7 cells. An immunohistochemical analysis demonstrated the expression of smooth muscle actin alpha 2 filaments in the PIC7 cells. A collagen gel contraction assay showed that the PIC7 cells were capable of both spontaneous contraction and contraction in response to serotonin stimulation. We conclude that the PIC7 cells are derived from an enteric SMC from the pig ileum. These cells may be a useful model for studying the cellular and molecular physiology of pig enteric SMCs. Because pigs are similar to humans in anatomy and physiology, the PIC7 cells may be also used as a model for human intestinal SMCs.

| S-EPMC7179811 | biostudies-literature

Early SIV infection and effects of pathogenic and commensal enteric bacteria on expression in ileum tissue

Project description:We used the ileal loop model to assess the effects of enteric bacteria organisms on host gene expression in intestinal tissue independent of and following early SIV infection. SIV infection in the gut causes rapid and severe immune dysfunction and damage to the intestinal structure, this may alter the intimate interaction with lumenal organisms. This study was performed to determine whether early SIV infection, prior to the depletion of CD4+ T cells, can alter interaction of the host with pathogenic Salmonella serovar Typhimurium (ST) or commensal Lactobacillus plantarum (LP), and to further understand the earliest changes to the intestinal mucosa following SIV infection. We used microarray analysis to detail the global program of gene expression underlying changes in the ileum following early SIV infection, and if these changes in any way alter the host interaction/ response to pathogenic and commensal enteric bacteria. A subset of animals were infected with SIVmac251 for 2.5 days, following which they underwent a loop surgery where the ileum was sectioned off with surgical ties and bacteria (ST or LP) or their respective media controls (LB or MRS) were injected intralumenally. Following 5 hours of incubation the loops were excised and frozen. Tissue sections were cut and RNA extracted for gene expression analysis. Rhesus Macaques infected with SIVmac251 for 2.5 days compared to uninfected controls. Comparisons are of ileum loop sections injected with Salmonella serovar Typhimurium, Lactobacillus Plantarum or respective media controls LB or MRS.

2014-12-19 | E-GEOD-52589 | biostudies-arrayexpress

Early SIV infection and effects of pathogenic and commensal enteric bacteria on expression in ileum tissue

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Enteric glia express proteolipid protein 1 and are a transcriptionally unique population of glia in the mammalian nervous system

Project description:To identify the gene expression profile of enteric glia and assess the transcriptional similarity between enteric and extraenteric glia, we performed RNA sequencing analysis on PLP1-expressing cells in the mouse intestine. This analysis shows that enteric glia are transcriptionally unique and distinct from other cell types in the nervous system. Enteric glia express many genes characteristic of the myelinating glia, Schwann cells and oli- godendrocytes, although there is no evidence of myelination in the murine ENS. Total RNA expression profiles of PLP1 expressing enteric glial cells (GFP+) and non-glial cells (GFP-negative) were obtained from the ileum and colon of juvenile PLP1-eGFP transgenic mice.

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hPSC-Derived Enteric Ganglioids Model Human ENS Development and Function [scRNA-seq]

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Microbiota–modulated CART+ enteric neurons autonomously regulate blood glucose

Project description:Microbial density and diversity increase in distal intestinal segments, affecting tissue physiology, metabolism, and function of both the immune and nervous systems. We characterized the influence of the microbiota on murine intrinsic enteric-associated neurons (iEAN). We found that iEAN are functionally adapted to the intestinal segment they occupy, with a stronger microbiota influence on ileal and colonic neurons. Chemogenetic characterization of microbiota-influenced iEAN identified a subset of viscerofugal CART+ neurons, enriched in the ileum and colon, able to modulate feeding and glucose metabolism. Retro- and anterograde tracing revealed that CART+ viscerofugal neurons send axons to the prevertebral ganglia and are poly-synaptically connected to the liver and pancreas. Microbiota depletion led to NLRP6 and Caspase 11-dependent loss of CART+ neurons, and impaired liver-mediated gluconeogenesis. Our results demonstrate a region-specific adaptation of enteric neurons and indicate that iEAN subsets are capable of regulating blood glucose levels independently from the central nervous system.

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