Role of glucose, fatty acids and protein in regulation of testicular growth and secretion of gonadotrophin, prolactin, somatotrophin and insulin in the mature ram

Reproduction, Fertility, and Development
R BoukhliqP J Murray

Abstract

This study tested whether the effects of nutrition on gonadotrophin secretion and testicular growth in mature rams are due to increases in the supply of glucose, fatty acids (FA) or amino acids. Responses to protein (casein) and glucose, alone or in combination, were compared with responses to lupin grain and responses to a combination of protein, glucose and FA (acetate, propionate and vegetable oil). Glucose and casein were infused intra-abomasally whereas lupins and FA were added to the diet. Lupin feeding decreased blood growth hormone (GH) concentrations, but increased pulsatile luteinizing hormone (LH) secretion and increased the concentrations of follicle-stimulating hormone (FSH), prolactin, glucose and insulin. These effects were associated with testicular growth. Glucose or casein increased insulin concentrations and decreased GH concentrations, but did not affect gonadotrophins or testicular growth. There was no synergism between casein and glucose. Responses elicited by adding FA to the glucose+casein treatment were similar to those observed with lupins. In conclusion, the reproductive axis does not seem to be closely linked with dietary intakes of amino acids or with circulating concentrations of glucose, insulin o...Continue Reading

Citations

Jul 1, 2010·Animal : an International Journal of Animal Bioscience·G B MartinP E Vercoe
Mar 24, 2012·Animal : an International Journal of Animal Bioscience·P McGilchristG E Gardner
Apr 28, 2009·Animal Reproduction Science·Pietro CeliGraeme B Martin
Jul 10, 2007·Theriogenology·P CeliG B Martin
Nov 5, 2011·Biology of Reproduction·Jean-Baptiste MenassolRex J Scaramuzzi
Dec 18, 2014·Reproduction, Fertility, and Development·Yongjuan GuanGraeme B Martin
Jul 11, 2006·Reproduction, Nutrition, Development·Dominique BlacheGraeme B Martin
Jul 28, 2018·International Journal of Environmental Research and Public Health·Yongsheng FanChunhong Wang
Mar 3, 2005·Reproduction, Fertility, and Development·T P SharmaG B Martin

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