Fecha/hora: 10/06/2024 22:43:42

Biblioteca(s): 	INIA Tacuarembó.	
Fecha corriente: 	11/05/2018	
Fecha de la última actualización: 	21/04/2020	
Autoria: 	GUGGERI, D.; MEIKLE, A.; CARRIQUIRY, M.; DE BARBIERI, I.; MONTOSSI, F.; VIÑOLES, C.	
Afiliación: 	DIANA MARGARITA GUGGERI GUIONET, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Universidad de la República (UdelaR)/ Facultad de Veterinaria; Universidad de la República (UdelaR)/ Facultad de Agronomía; LUIS IGNACIO DE BARBIERI ETCHEBERRY, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FABIO MARCELO MONTOSSI PORCHILE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Center for the Reproductive Health of Ruminants in Agroforestry Systems, UdelaR, Cerro Largo, Uruguay.	
Título: 	Long-term effect of early nutrition on endocrine parameters and liver and endometrial gene expression of the members of the somatotrophic axis in Hereford heifers.	
Año de publicación: 	2018	
Fuente/Imprenta: 	Reproduction in Domestic Animals, 2018, v. 53 (4):930-936. DOI: 10.1111/rda.13190	
ISSN: 	14390531	
DOI: 	10.1111/rda.13190	
Idioma: 	Inglés	
Notas: 	Article history: Received: 12 January 2018; Accepted: 11 February 2018. ACKNOWLEDGEMENTS: The authors would like to thank all the staff at Glencoe Research
Station, and the Laboratory of Animal Endocrinology and Metabolism, for their excellent work during the experiment. Thanks are due to Juan Manuel Soares de Lima, for his advice in performing
the statistical analysis and Ana Laura Astessiano for her guide in the
laboratory	
Contenido: 	This study compared the effect of different management systems on endocrine parameters, and gene expression of members of the somatotrophic axis in the liver
and endometrium of beef heifers. Twenty-two 709-days- old heifers submitted to Early Weaning (EW, n = 8), Traditional Weaning (TW, n = 7) and TW plus creep feeding
(TW+CF, n = 7) were used. Animals were synchronized with two prostaglandin (PG) injections at 11-day interval (Oestrus = Day 0). Blood samples were collected
daily for progesterone (P4) determination, and endometrial and liver biopsies on Days 7 and 16 for transcript determination of members of the somatotrophic axis.
Progesterone concentrations were greater on Days 15 and 16 (p < .02) of the cycle in TW+CF than TW and EW heifers. On Day 7, TW+CF heifers expressed greater liver
total growth hormone receptor transcripts than TW heifers (p = .05) and greater insulin-like growth factor (IGF)-binding protein 3 mRNA than both EW and TW
groups (p < .05). On Days 7 and 16, TW+CF expressed more endometrial IGF1 mRNA than the other groups (p < .01). We conclude that increasing the plane of nutrition of nursing calves may have a long-term effect on the functioning of the somatotrophic axis both in the liver and in the endometrium.	
Palabras-Clave: 	ANIMAL PRODUCTION; BEEF CATTLE; CAMPOS GRASSLAND; EARLY LIFE; NUTRITIONAL MANAGEMENT.	
Thesagro: 	HEREFORD; NUTRICION ANIMAL.	
Categoría del tema: 	A50 Investigación agraria	
Registro original: 	INIA Tacuarembó (TBO)	
Ejemplares: 	TBO - (102643-1) - PXI - AP - DD -  -  -  - DIS