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Transcriptomics of hypothalamic responses of broiler chickens fed L-citrulline supplemented diets under different ambient temperatures

ABSTRACT: The above study is an original research that employs transcriptomics analysis to investigate the hypothalamic responses associated with dietary L-Citrulline treatment. L-Citrulline is a non-essential amino acid that is widely gaining research interest due to its role in thermoregulation and its efficiency as an arginine/nitric oxide precursor. Therefore, this study demonstrates that dietary supplementation of L-citrulline to broilers under different housing temperatures would stimulate regulatory pathways involved with brain development and feeding behavior. We have also identified potential candidate genes that would be beneficial in fostering further research on L-citrulline-induced hypothermia.

ORGANISM(S): Gallus gallus

PROVIDER: GSE202003 | GEO | 2022/05/09

REPOSITORIES: GEO

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Project description:Chromosomal structural variation can cause alterations in gene dosage and gene regulation between genomes. Structural variants producing a change in the number of copies of a genomic region are termed copy number variants (CNVs). CNVs have been demonstrated to have causative effects on both Mendelian and complex traits, including susceptibility to infectious diseases. We are interested in mapping CNVs to domesticated chicken breeds to help determine structural variation between genomes that influences economically important traits. For this study, Fayoumi, Leghorn, Line A broiler and Line B broiler chicken were chosen. Fayoumi and Leghorn chickens were selected as these two breeds harbor different responses certain pathogens like Avian Influenza Virus and coccidiosis; Broiler Line A and Line B indivduals were chosen as they harbor different intestinal colonization loads to the bacterium Campylobacter jejuni. Campylobacter genetic Line A and genetic Line B are from a commercial producer have been previously described as either resistant (Line A) or susceptible (Line B). Highly inbred chicken lines Fayoumi M15.2 (n=6) and Leghorn GHs6 (n=6) and broilers from Line A (n=24 individuals in pools of 4) and Line B (n=24 individuals in pools of 4)were subjected to array Comparative Genomic Hybridization (aCGH). Each sample was normalized to a Red Jungle Fowl reference. CNVs for each individual and between lines were determined. The major goal of this study was to discover and characterize CNVs in chickens to further narrow in on Quantitative Trait Loci (QTLs) affecting disease response. For the test DNA in Fayoumi and Leghorn, samples from 6 inbred Fayoumi and 6 inbred Leghorn individuals were used; For the test DNA in the Campylobacter genetic lines, samples from 24 individual broilers of Line A (in pools of 4) and 24 individual broilers of Line B (in pools of 4) were used. For the reference DNA, Red Jungle Fowl line UCD001 was used from a self-self hybridization.

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Transcriptomics of hypothalamic responses of broiler chickens fed L-citrulline supplemented diets under different ambient temperatures

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