Data/hora: 10/06/2024 07:50:40

Provedor de dados: 	56	
País: 	Brazil	
Título: 	Is the Thoroughbred race-horse under chronic stress?	
Autores: 	Nogueira,G.P.; Barnabe,R.C.	
Data: 	1997-10-01	
Ano: 	1997	
Palavras-chave: 	Horses; Cortisol; Exercise; Chronic stress.	
Resumo: 	Thoroughbred fillies were divided into three groups according to age: group 1, 7 fillies aged 1 to 2 years (G1) starting the training program; group 2, 9 fillies aged 2 to 3 years (G2) in a full training program; group 3, 8 older fillies 3 to 4 years of age (G3) training and racing. Blood samples were collected weekly from July to December. Cortisol was quantified using a solid phase DPC kit. The intra- and interassay coefficients of variation were 12.5% and 15.65% and sensitivity was 1.9 ± 0.2 nmol/l. The semester average of cortisol levels varied between groups: G1 = 148.8 ± 6.7, G2 = 125.7 ± 5.8, G3 = 101.1 ± 5.4 nmol/l, with G3 differing statistically from the other groups. The lower cortisol levels observed in the older fillies lead us to propose that the stress stimulus, when maintained over a long period of time, may become chronic and result in a reduction of hypophyseal corticotropin-releasing hormone receptors. The secretion of endogenous opioids may also lead to low serum cortisol levels.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001000016	
Editor: 	Associação Brasileira de Divulgação Científica	
Relação: 	10.1590/S0100-879X1997001000016	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Medical and Biological Research  v.30 n.10 1997	
Fonte: 	info:eu-repo/semantics/openAccess