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Uterine infection alters bovine endometrium, oviduct and granulosa transcriptome three months later

ABSTRACT: Uterine infection alters bovine endometrium, oviduct and granulosa transcriptome three months later

PROVIDER: PRJNA589857 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10462329_1.fastq.gz	Fastqsanger.gz
	SRR10462329_2.fastq.gz	Fastqsanger.gz
	SRR10462330_1.fastq.gz	Fastqsanger.gz
	SRR10462330_2.fastq.gz	Fastqsanger.gz
	SRR10462331_1.fastq.gz	Fastqsanger.gz

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Uterine infection alters bovine endometrium, oviduct and granulosa transcriptome three months later

Project description:Here we tested the hypothesis that intrauterine infusion of pathogenic bacteria leads to changes in the transcriptome of the reproductive tract in dairy cattle three months later. We used virgin Holstein heifers to avoid the confounding effects of periparturient problems, metabolic stress and lactation. Animals were infused intrauterine with endometrial pathogenic bacteria Escherichia coli and Trueperella pyogenes to induce clinical endometritis (n = 4) and compared with control animals (n = 6). Three months after infusion, the caruncular and intercaruncular endometrium, isthmus and ampulla of the oviduct, and granulosa cells from dominant ovarian follicles were profiled by RNA-sequencing. Compared with control, bacterial infusion altered the transcriptome of all the tissues. Most differentially expressed genes were tissue-specific, with 109 differentially expressed genes unique to the caruncular endometrium, 57 in the intercaruncular endometrium, 65 in the isthmus, 298 in the ampulla, and 83 in granulosa cells. Surprisingly, despite infusing the bacteria into the uterus, the granulosa cells had more predicted upstream regulators of differentially expressed genes than all the other tissues combined. In conclusion, there was evidence of long-term changes to the transcriptome of the endometrium, oviduct and even the granulosa cells after intrauterine infusion of pathogenic bacteria, which implies that all these tissues contribute to the infertility that persists after endometritis.

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Project description:The endometrium provides optimal conditions for the transport of sperm to the oviduct, to the site of fertilization, and later on for the reception of the embryo. To study these changes on the level of gene expression, a messenger RNA expression profiling of endometrium tissue samples collected from 19 cyclic heifers at five stages of the estrous cycle (days 0, 3.5, 12, 18, 20) was performed. RNA was extracted from these tissue samples and analyzed with a custom-made bovine oviduct and endometrium (BOE) cDNA array. The cDNAs present on the array were derived from several previously conducted differential gene expression studies of bovine endometrium between different stages of the estrous cycle, during early pregnancy, and from studies of bovine oviduct epithelial cells. In all of these studies cDNAs of differentially expressed genes were identified using a combination of subtracted cDNA libraries and cDNA array hybridization. 1,440 cDNA fragments are located on the array. Twenty radioactively labeled cDNA samples (n=4 for each cycle stage) were hybridized with BOE arrays. Raw data were normalized using the BioConductor package vsn. Keywords: time course of gene expression in bovine endometrium during estrous cycle

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