Fecha/hora: 16/06/2024 04:17:30

Biblioteca(s): 	INIA Tacuarembó; INIA Treinta y Tres.	
Fecha corriente: 	18/10/2018	
Fecha de la última actualización: 	09/10/2019	
Autoria: 	MARESCA, S.; LÓPEZ VALIENTE, S.; RODRÍGUEZ, A.M.; LONG, N.M.; PAVAN, E.; QUINTANS, G.	
Afiliación: 	S. MARESCA, Cuenca del Salado Experimental Station, National Institute of Agricultural Technology,  Buenos Aires.; S. LÓPEZ VALIENTE, Cuenca del Salado Experimental Station, National Institute of Agricultural Technology,  Buenos Aires.; A.M. RODRÍGUEZ, Cuenca del Salado Experimental Station, National Institute of Agricultural Technology,  Buenos Aires.; N.M. LONG, Department of Animal Veterinary Sciences, Clemson University, USA.; E. PAVAN, Cuenca del Salado Experimental Station, National Institute of Agricultural Technology,  Buenos Aires.; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Effect of protein restriction of bovine dams during late gestation on offspring postnatal growth, glucose-insulin metabolism and IGF-1 consentration.	
Año de publicación: 	2018	
Fuente/Imprenta: 	Livestock Science, 2018, 212: 120-126.	
DOI: 	10.1016/j.livsci.2018.04.009	
Idioma: 	Inglés	
Notas: 	Article history: Received 10 October 2017. Received in revised from 27 March 2018, accepted 11 April 2018.	
Contenido: 	Abstract:
The objective of this study was determine whether the amount of protein provided to cows during late gestation would affect postnatal growth and lead to changes on glucose, insulin and insulin-like growth factor concentrations. At 134 d prepartum, 68 multiparous Angus cows were blocked by BW and expected calving date and
randomly assigned to low protein level (LP, 6% CP) or high protein level (HP, 12% CP) and were allotted in 12 pens per treatment. At calving, cows were managed together on improved pastures until weaning. Calves were weighed and body measurements were recorded at birth. Blood samples were taken at birth and each 30 d until weaning at 180 d of age. Body weight at birth on HP progeny tended to be great than LP progeny (P=0.06). At birth, calves from LP dams had greater head circumference (P ? 0.01), heart girth (P=0.01) and cannon bone circumference (P=0.02). However, head circumference /birth BW ratio (P=0.04), heart girth /birth BW ratio (P=0.01), body length /birth BW ratio (P=0.05) and height /birth BW ratio (P=0.01) was greater on LP calves. Body mass index was greater in HP calves (P=0.04). No differences were found on BW of calves at weaning, adjusted 205d BW and ADG during lactation (P ? 0.10). Glucose concentrations were greater on LP
calves than HP calves from birth to weaning (81.0 ± 1.5 vs. 76.4 ± 1.2 mg/dl; P ? 0.001) without any change in insulin concentrations during preweaning growth (LP=1.61 ± 0.04 ng/ml; HP=1.61 ± 0.04 ng/ml; P ? 0.10). Insulin-like growth factor concentrations was less on LP calves at birth (P ? 0.05) and similar to HP calves
during postnatal growth (P ? 0.10). These data demonstrate that low protein during late gestation in bovine dams may affect fetal growth with proportional increasing of head circumference and low body mass index. Level of protein compromised glucose regulation in early life and affected the IGF-I concentration of newborn calves.	
Palabras-Clave: 	GESTATION; GLUCOSE METABOLISM; IGF-1; POSTNATAL GROWTH; UNDERNUTRITION.	
Thesagro: 	BOVINOS; GESTACION.	
Categoría del tema: 	L10 Genética y mejoramiento animal	
Registro original: 	INIA Tacuarembó (TBO)	
Ejemplares: 	TBO - (102891-1) - PXI - AP - DD -  -  -  - DIS
TT - (102611-1) - PXI - AP - DD - PP/Livestock-Science/2018/212 -  -  - DIS