Methylation profiling

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The bovine alveolar macrophage (bAM) DNA methylome is resilient to infection with Mycobacterium bovis


ABSTRACT: Whole genome bisulfite sequencing (WGBS) was used to assess the effect of M. bovis infection on the bAM DNA methylome (5-methylcytosine). The methylomes of bAM infected with M. bovis (n = 8) were compared to those of non-infected control bAM (n = 8) at 24 hours post-infection (hpi). No differences in DNA methylation (CpG or non-CpG) were observed between control and infected bAM. Analysis of DNA methylation at proximal promoter regions uncovered >250 genes harbouring intermediately methylated (IM) promoters (average methylation = 33–66%). Gene ontology (GO) analysis, focusing on genes with low, intermediate or highly methylated promoters, revealed that genes with IM promoters were enriched for immune-related GO categories; this enrichment was not observed for genes in the high or low methylation groups. Targeted analysis of two non-imprinted genes in the IM category, C1QB and IL2RA, confirmed the WGBS observation. This study is the first in cattle to examine genome-wide DNA methylation at single nucleotide resolution in an important bovine cellular host-pathogen interaction model and provides evidence for intermediate promoter methylation in bAM.

ORGANISM(S): Bos taurus

PROVIDER: GSE110412 | GEO | 2019/02/13

REPOSITORIES: GEO

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