title: Differential expression analysis of the broiler tracheal proteins responsible for the immune response and muscle contraction induced by high concentration of ammonia using iTRAQ-coupled 2D LC-MS/MS.
abstract: Ammonia has been considered the contaminant primarily responsible for respiratory disease in poultry. Even though it can cause tracheal lesions, its adverse effects on the trachea have not been sufficiently studied. The present study investigated tracheal changes in Arbor Acres broilers (Gallus gallus) induced by high concentration of ammonia using isobaric tag for relative and absolute quantification (iTRAQ)-based proteome analysis. In total, 3,706 proteins within false discovery rate of 1% were identified, including 119 significantly differentially expressed proteins. Functional analysis revealed that proteins related to immune response and muscle contraction were significantly enriched. With respect to the immune response, up-regulated proteins (like FGA) were pro-inflammatory, while down-regulated proteins participated in antigen processing and antigen presenting (like MYO1G), immunoglobulin and cathelicidin production (like fowlicidin-2), and immunodeficiency (like PTPRC). Regarding muscle contraction, all differentially expressed proteins (like TPM1) were up-regulated. An over-expression of mucin, which is a common feature of airway disease, was also observed. Additionally, the transcriptional alterations of 6 selected proteins were analyzed by quantitative RT-PCR. Overall, proteomic changes suggested the onset of airway obstruction and diminished host defense in trachea after ammonia exposure. These results may serve as a valuable reference for future interventions against ammonia toxicity.
authors.affiliation: State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Xiong
authors.affiliation: State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
authors.forename: Xiangfang
authors.initials: X
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
authors.forename: Qingshi
authors.initials: Q
authors.lastname: Meng
authors.affiliation: State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China. zhanghongfu@caas.cn.
authors.forename: Hongfu
authors.initials: H
authors.lastname: Zhang
mesh_terms: D000641:Ammonia / Q000494:pharmacology*; D000818:Animals; D030161:Avian Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D001835:Body Weight / Q000187:drug effects; D002645:Chickens; D002853:Chromatography, Liquid / Q000379:methods*; D004435:Eating / Q000187:drug effects; D020869:Gene Expression Profiling / Q000379:methods; D053583:Interleukin-1beta / Q000097:blood; D015850:Interleukin-6 / Q000097:blood; D007553:Isotope Labeling / Q000379:methods; D008315:Malondialdehyde / Q000378:metabolism; D009119:Muscle Contraction / Q000502:physiology; D020543:Proteome / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D040901:Proteomics / Q000379:methods*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014132:Trachea / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology
chemical_list: D030161:Avian Proteins; D053583:Interleukin-1beta; D015850:Interleukin-6; D020543:Proteome; D008315:Malondialdehyde; D000641:Ammonia
keywords: ammonia; broiler; proteomics; trachea