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Atypical chromatin structure of immune-related genes expressed in chicken erythrocytes [ChIP-seq]

ABSTRACT: Transcriptional regulation is impacted by multiple layers of genome organization. Here, we report that immune genes were associated with H3K4me3 and H3K27ac.Our data provide a genome-wide profile of chromatin signatures for immune genes in chicken polychromatic erythrocytes.

ORGANISM(S): Gallus gallus

PROVIDER: GSE128864 | GEO | 2020/12/31

REPOSITORIES: GEO

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Atypical chromatin structure of immune-related genes expressed in chicken erythrocytes [RNA-seq]

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Atypical chromatin structure of immune-related genes expressed in chicken erythrocytes

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Chicken erythrocytes stimulated with LPS, PGN and Poly(I:C)

Project description:Erythrocytes represent the most abundant cell type of the bloodstream in all vertebrates. The principal feature that differenciates erythrocytes of non-mammals is that unlike mammals they mantain the nucleus in their terminal differentiation. While the main function associated to erythrocytes is the oxygen and carbon dioxide transport, some other functions, no less important, have been attributed to these cells. The focus of this study was to investigate the response of cultured chicken erythrocytes to bacterial lipopolysaccharide (LPS), bacterial peptidoglycan (PGN) and to the analog viral dsRNA Poly(I:C) using a comercial microarray platform from Agilent. Chicken erythrocytes were isolated from blood by twice Ficoll 1.007 density gradient centrifugations. For primary cell culture, erythrocytes were resuspended in DMEM (PAA Laboratories) supplemented with 10% heat-inactivated fetal bovine serum (FBS, PAA Laboratories) and the antibiotic Primocin (100 μg/ml, Invivogen) at a density of 7.5x106 cells/ml in six well cell culture plates (NUNC) and cultured at 37ºC and 5% CO2. Erythrocytes were stimulated with LPS from E. coli (serotype 0111:B4, Sigma) and Poly(I:C) (Invivogen) at 50 μg/ml, and with peptidoglycan from E.coli (0111:B4, Invivogen) at 5 μg/ml. All culture plates were incubated for 12h. Total RNA was extracted from the cultures using 1 ml of Tri Reagent (Sigma) following the manufacturer’s instructions with minor modifications. Quantity and integrity was analyzed by Nanodrop1000 (ThermoScientific) and Bioanalyzer 2100 (Agilent Technologies) respectively. Three biological replicates were used.

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