Produção Nacional
Revisado por pares
Heat stress induces expression of HSP genes in genetically divergent chickens
2017; Public Library of Science; Volume: 12; Issue: 10 Linguagem: Inglês
10.1371/journal.pone.0186083
ISSN1932-6203
AutoresHaniel Cedraz de Oliveira, Juliana Gracielle Gonzaga Gromboni, Antônio Amândio Pinto Garcia, Ronaldo Vasconcelos Farias Filho, Teillor Machado Souza, Eduardo Ribeiro de Oliveira, Elizângela Bonfim de Oliveira, Carlos Souza do Nascimento, Camila Meneghetti, Amauri Arias Wenceslau,
Tópico(s)Meat and Animal Product Quality
ResumoBackground Chickens are animals that are sensitive to thermal stress, which may decrease their production level in terms that it affects feed intake and thus, decreasing body weight gain. The Heat Shock Factors (HSF) and Heat Shock Proteins (HSP) genes are involved in the key cellular defense mechanisms during exposure in hot environments. Aimed with this study to analyze the expression of HSF1, HSF3, HSP70 and HSP90 genes in two local breeds (Peloco and Caneluda) and a commercial broiler line (Cobb 500®) to verify differences in resistance of these chicken to Heat stress treatment. Chicken were submitted to heat stress under an average temperature of 39°C ± 1. Results Under stress environment, the HSP70 and HSP90 genes were more expressed in backyard chickens than in broiler. There was a difference in HSP70 and HSP90 expression between Caneluda and Cobb and between Peloco and Cobb under stress and comfort environment respectively. HSP70 expression is higher in local breeds during heat stress than in a commercial broiler line. No significant differences were observed in the expression of HSF1 and HSF3 genes between breeds or environments. Conclusions HSP70 and HSP90 genes are highly expressed, HSF1 and HSF3 genes did not have high expression in all genetic groups. HSP70 and HSP90 are highly expressed in Peloco and Caneluda within heat stress, these breeds proved to be very resistant to high temperature.
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