A note on protein expression changes in chicken breast muscle in response to time in transit before slaughtering

Proteome Science

Martino Cassandro¹  Servet Yalçin²  Cem Guler²  Anna Rita Trentin¹  Serena Tolin³  Micaela Pivato³  Antonio Masi¹  Enrico Zanetti¹ 

[1]Department of Agronomy, Food, Natural Resources, Animals and the Environment, University of Padova, Viale dell’Università 16, Padova, Legnaro 37020, Italy

[2]Animal Science Department, Ege University, Izmir TR-35100, Turkey

[3]Padova University Proteomics Center, Via G. Orus 2b, Padova 35129, Italy

关键词: Pre-slaughter management;    Protein expression;    Proteome;    Chicken;   

Others  :  816828
DOI  :  10.1186/1477-5956-11-34

 received in 2012-08-07, accepted in 2013-07-15,  发布年份 2013

【 摘 要 】

Aims of the research were to devise a proteome map of the chicken Pectoralis superficialis muscle, as resolved by two-dimensional gel electrophoresis, and to characterize protein expression changes in the soluble protein fraction in commercial conditions due to age and to time in transit before slaughtering. Broilers were reared under commercial conditions until they reached a mean 1.8 kg and 36 d, or 2.6 kg and 46 d of age. Transport to the slaughterhouse took 90 or 220 minutes. Transport-induced stress was assessed from blood metabolites and leukocyte cell counts, revealing significant changes in albumin, glucose and triglyceride concentrations, in heterophils and leukocyte counts for chickens in transit for longer, and in glucose depending mainly on age. The sarcoplasmic protein fractions were extracted from a total of 39 breast muscle samples, collected 15 min post mortem, for analysis by two-dimensional electrophoresis.

Image and statistical analyses enabled us to study the qualitative and quantitative differences between the samples. Twelve up- or down-regulated protein spots were detected (P < 0.05): 8 related to the age effect, 2 to time in transit, and 2 to the interaction between the two. Age and time in transit influenced the avian proteome regulating the biological processes linked to the cellular housekeeping functions, related mainly to metabolism, cell division and control of apoptosis. Principal component analysis clustering was used to assess differences between birds. Age difference discriminated between the chickens analyzed better than time in transit, which seemed to have less general impact on the proteome fraction considered here.

Isolating and identifying the proteins whose expression changes in response to transport duration and age shed some light on the biological mechanisms underlying growth and stress-related metabolism in chickens. Our results, combined with a further characterization of the chicken proteome associated with commercial chicken slaughtering management, will hopefully inspire alternative strategies and policies, and action to reduce the impact of stress related to time in transit.

【 授权许可】

   
2013 Zanetti et al.; licensee BioMed Central Ltd.

【 图 表 】

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