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Gallus gallus

ABSTRACT: Unique Genetic Responses Revealed in RNA-seq of the Spleen of Chickens Stimulated with Lipopolysaccharide and Heat

PROVIDER: PRJNA340891 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR4096110.fastq.gz	Fastqsanger.gz
	SRR4096120.fastq.gz	Fastqsanger.gz
	SRR4096130.fastq.gz	Fastqsanger.gz
	SRR4096140.fastq.gz	Fastqsanger.gz
	SRR4096111.fastq.gz	Fastqsanger.gz

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CUT&Tag for analysis of Nrf2-regulated genes in liver of heat-stressed chicken (Gallus gallus)

Project description:The aim of the present study was to investigated the difference of Nrf2-regulated genes in livers between normal and heat-stressed chickens. The CUT&Tag and high-throughput sequencing technologies were used in this experiment. Results showed that 13171838- 15417444 clean reads were obtained in this study. These data suggested that there were many Nrf2- regulated genes in the liver of heat-stressed chicken.

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Unique Genetic Responses Revealed in RNA-seq of the Spleen of Chickens Stimulated with Lipopolysaccharide and Heat

Project description:Climate change and disease have large negative impacts on poultry production, but little is known about the interactions of responses to these stressors in chickens. Fayoumi (heat and disease resistant) and broiler (heat and disease susceptible) chicken lines were stimulated at 22 days of age, using a 2x2x2 factorial design including: breed (Fayoumi or broiler), inflammatory stimulus [lipopolysaccharide (LPS) or saline], and temperature (35°C or 25°C). Transcriptional changes in spleens were analyzed using RNA-sequencing on the Illumina HiSeq 2500. Thirty-two individual cDNA libraries were sequenced (four per treatment) and an average of 22 million reads were generated per library. Stimulation with LPS induced more differentially expressed genes (DEG, log2 fold change ≥ 2 and FDR ≤ 0.05) in the broiler (N=283) than the Fayoumi (N=85), whereas heat treatment resulted in fewer DEG in broiler (N=22) compared to Fayoumi (N=107). The double stimulus of LPS+heat induced the largest numbers of changes in gene expression, for which broiler had 567 DEG and Fayoumi had 1471 DEG of which 399 were shared between breeds. Further analysis of DEG revealed pathways impacted by these stressors such as Remodelling of Epithelial Adherens Junctions due to heat stress, Granulocyte Adhesion and Diapedesis due to LPS, and Hepatic Fibrosis/Hepatic Stellate Cell Activation due to LPS+heat. The genes and pathways identified provide deeper understanding of the response to the applied stressors and may serve as biomarkers for genetic selection for heat and disease tolerant chickens.

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Down-regulatory responses to heat stress and lipopolysaccharide in the chicken thymic transcriptome

Project description:For this study, thymic transcriptome responses to an acute heat stress and/or lipopolysaccharide (LPS) were investigated in a broiler line (heat and disease susceptible) and an inbred Fayoumi line (heat and disease resistant) of chickens. In a 2 x 2 design, 22 day-old birds were exposed to heat stress (35°C for 7 hours), lipopolysaccharide (100 µg/kg average body weight per line), or both stressors. Thermoneutral temperature (25°C) and phosphate buffered saline were used as the respective controls. Tissue samples were collected from the thymus and used to isolate high quality RNA. cDNA libraries (n = 31) were constructed and sequenced on the HiSeq 2500.

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