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Chicken caecal tonsil transcriptome

ABSTRACT: Caecal tonsil transcriptome of inbred chickens with and without C. jejui challenge

PROVIDER: PRJEB24399 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR2244890_1.fastq.gz	Fastqsanger.gz
	ERR2244890_2.fastq.gz	Fastqsanger.gz
	ERR2244900_1.fastq.gz	Fastqsanger.gz
	ERR2244900_2.fastq.gz	Fastqsanger.gz
	ERR2244881_1.fastq.gz	Fastqsanger.gz

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Project description:Campylobacter jejuni is the major cause of acute gastroenteritis in the developed world. It is usually acquired through contaminated poultry as C. jejuni causes a silent asymptomatic infection of the chicken. Pathogens face different sources of stress during its transit through the gut. In this study, we describe the ability of C. jejuni to survive nitrosative stress at very low oxygen levels that reflect those in hypoxic gut environments. Specifically, we here explore an innovative model of signal recognition during colonization. We use a diffusion capsule to feed small, diffusible molecules from chicken caecal matter into a microaerobic C. jejuni culture to study the transcriptomic changes mounted as response to chemical signals present in the chicken gut. We find that in early stages of exposure to the caecal contents (10 min) the dual component colonization regulator, dccR, plays an important yet not fully understood role. Although the caecal material contains cyanide derived from plant sources, we find no role for a truncated globin (encoded by ctb), which has previously been implicated in resistance to this haem ligand.

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Project description:Chicken 60-mer oligonucleotide microarray, including 39854 cDNA and ESTs, entire Marek’s disease virus and avian influenza virus genomes, and 150 chicken microRNAs, was developed. Cecal tonsil, ileum, liver and spleen from 6 chickens were selected for hybridization to validate the microarray performance. There are 2886, 2886, 2660, 358, 3208 3355, and 3710 genes significantly expressed between liver and spleen, spleen and cecal tonsil, cecal tonsil and ileum, liver and cecal tonsil, liver and ileum, spleen and ileum at the P<10-7. Number of tissue specific genes for cecal tonsil, ileum, liver and spleen was 95, 71, 535, and 108, respectively with p < 10-7. More than 95% of spots had high SNR (>10). Keywords: characteristics of newly developed microarray using different normal tissue Loop design was carried on for all of tissue samples from the six chickens. Samples of four tissues from a chicken were used in each loop. The order of the tissues in each loop was changed so that all pairs of tissues were combined on an array with an equal number of times. Dye swap was used so that each tissue was measured an equal number of times with each dye. Data from 12 measurements for each tissue were collected, in total, 48 measurements from 24 arrays.

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