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<p>This study investigated the impact of heat stress on serum proteomics, laying performance, and egg quality in aged laying hens. Forty-eight 75-week-old Lohmann White hens were divided into two groups and subjected to either a comfort environment (26&#xa0;°C) or heat stress (35&#xa0;°C) for 28 days. Serum samples were collected on days 1 and 28 for proteomic analysis, while egg production and quality parameters were assessed daily throughout the experiment. Heat stress reduced egg production (11%), egg weight (16%), shell strength (30%), shell thickness (13.5%), and albumen height (12%). Proteomic analysis revealed the expression of proteins that bind to the heat shock proteins Hsp70 and Hsc70, exclusively in heat-stressed laying hens. Proteins related to coagulation rate were upregulated and when compared with field observations may indicate possible Disseminated Intravascular Coagulation (DIC). Apolipoprotein A and apovitelenin-1 were associated with decreased egg production and quality under heat stress.</p>

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Effects of heat stress on serum proteomics, laying performance and egg quality in aged laying hens

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月1日

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  • Silvana Gomes Gonzalez,
  • Fernanda Paes de Oliveira,
  • Ariadne Ramos Gomes,
  • Bruna Cavecci-Mendonça,
  • Bruno Cesar Rossini,
  • Felipe André dos Santos,
  • Lucilene Delazari dos Santos,
  • Danilo Florentino Pereira

摘要

This study investigated the impact of heat stress on serum proteomics, laying performance, and egg quality in aged laying hens. Forty-eight 75-week-old Lohmann White hens were divided into two groups and subjected to either a comfort environment (26 °C) or heat stress (35 °C) for 28 days. Serum samples were collected on days 1 and 28 for proteomic analysis, while egg production and quality parameters were assessed daily throughout the experiment. Heat stress reduced egg production (11%), egg weight (16%), shell strength (30%), shell thickness (13.5%), and albumen height (12%). Proteomic analysis revealed the expression of proteins that bind to the heat shock proteins Hsp70 and Hsc70, exclusively in heat-stressed laying hens. Proteins related to coagulation rate were upregulated and when compared with field observations may indicate possible Disseminated Intravascular Coagulation (DIC). Apolipoprotein A and apovitelenin-1 were associated with decreased egg production and quality under heat stress.