El estrés térmico agudo promueve cambios morfológicos y moleculares en el corazón de los pollos de engorde

Autores/as

DOI:

https://doi.org/10.33448/rsd-v9i8.5059

Palabras clave:

avicultura; células cardíacas; parámetros bioquímicos.

Resumen

Este estudio tuvo como objetivo comprender los posibles efectos del estrés térmico agudo (32ºC, 12 horas) en la temperatura corporal utilizando dos métodos de medición (a través de sonda y rectal), en los aspectos morfométricos del corazón y la arteria aórtica, en la expresión génica (superóxido dismutasa, glutatión peroxidasa-3, óxido nítrico sintasa, enzima convertidora de angiotensina y proteína de transferencia de colesterol esterificada), parámetros inflamatorios (mieloperoxidasa y N-acetilglucosaminidasa), parámetros de estrés oxidativo y niveles de nitrito en pollos de engorde (Cobb 500) a los 42 días de edad. Se utilizaron 36 pollos de engorde con 42 días de edad, distribuidos en un esquema factorial 2x2: dos ambientes térmicos (comodidad a 18ºC y estrés a 32ºC) y dos métodos para medir la temperatura corporal (a través de sonda y rectal). El estrés térmico provocó un aumento de la temperatura corporal, independientemente del método de medición. Hubo un efecto significativo en el grosor de la pared de la arteria aórtica y en los diámetros antero lateral y posterior (P <0.05). Asimismo, hubo una diferencia en las dosis de hidroperóxidos lipídicos, en la cuantificación de especies reactivas de oxígeno y en la dosis de nitrito (P <0.05). La cuantificación del ARNm de la sintasa de óxido nítrico inducida, la enzima convertidora de angiotensina y los genes de proteína de transferencia de colesterol esterificada fueron significativamente mayores en animales sometidos a estrés por calor. Por lo tanto, se puede concluir que el estrés térmico agudo fue capaz de promover varios cambios morfológicos y moleculares en el corazón y la arteria aorta de los pollos de engorde.

Biografía del autor/a

Kariny Ferreira Moreira, State University of Maringá, Paraná- PR

Doutora em Zootenia; Produção Animal

Citas

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Publicado

24/06/2020

Cómo citar

MOREIRA, K. F.; NEVES, C. Q.; BORGES, S. C.; VESCO, A. P. D.; SPEZIALI, M. I. B. R.; BUTTOW, N. C. .; BARBOSA, C. P.; GASPARINO, E. El estrés térmico agudo promueve cambios morfológicos y moleculares en el corazón de los pollos de engorde. Research, Society and Development, [S. l.], v. 9, n. 8, p. e63985059, 2020. DOI: 10.33448/rsd-v9i8.5059. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/5059. Acesso em: 26 nov. 2024.

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Sección

Ciencias Agrarias y Biológicas