The response of rats to solanidine glycoalkaloids and trypsin inhibitor present in potato protein concentrates, and to glycoalkaloids provided by potato sprouts
Journal Title: Journal of Animal and Feed Sciences - Year 2013, Vol 22, Issue 2
Abstract
The effects of potato protein concentrates (PPC) differing in dietary solanidine glycoalkaloids (SGA) and trypsin inhibitor activity (TI), and of potato sprouts with differing SGA levels, were studied in rats. In Experiment 1, semi-purified isoprotein diets containing casein or one of six PPC contributing from 116 to 439 mg SGA · kg–1 and from 0.13 to 0.45 mg · g–1 of TI activity, were used. Weight gain was significantly greater on the diet containing PPC with low SGA and low TI than on PPC with high SGA and moderate TI contents, and also higher than on casein. Weight gain was also slightly depressed on diets with the highest TI activity. Substitution of PPC for casein resulted in lowering the pH of caecal digesta and increasing short-chain fatty acids concentration. Feeding diets with the greatest SGA content induced depression of protein and organic matter digestibility while diets with the greatest TI activity decreased protein digestibility but did not affect pancreas weight. In Experiment 2, a commercial rat diet, supplemented with increasing amounts of potato sprout meal providing SGA in the range from 0 to 300 mg · kg–1, was used. Neither growth performance, organ weights, caecal parameters, nor enzyme activities were affected by the diet. It is postulated that the less evident response of rats to SGA in the natural ingredient than in the semi-purified diet was due to the attenuating effect of more intensive bacterial fermentation. Potato trypsin inhibitor should be considered as an antinutritional factor in PPC; interactive effects of SGA and TI are presumable.
Authors and Affiliations
A. Tuśnio, B. Pastuszewska, M. Taciak, J. Skomiał
Keywords
Related Articles
- EP ID EP72964
- DOI -
- Views 98
- Downloads 0
Proteomic studies in pregnant and lactating cows. A review
Proteomics, an innovative branch of science, deals with comprehensive analysis of protein expression at a particular time in a given biological system. Proteomics enables analysis of the repertoire of proteins, compariso...
Modeling lactation curves of Polish Holstein-Friesian cows. Part II: Prediction of 305-d lactation milk, fat and protein yields
The objective of the study was to compare five lactation curve models, Ali and Schaeffer, Guo, Wilmink, and third- and fourth-order normalized Legendre polynomials, for their ability to reliably predict 305-d lactation y...
Effects of conjugated linoleic acid supplementation on growth, carcass characteristics and fatty acid profiles of muscle and fat in growing-finishing pigs
This study investigated the effects of dietary supplementation of conjugated linoleic acid (CLA) on the growth performance, carcass characteristics, muscle quality and fatty acid compositions in the skeletal muscle and b...
Evolution of gonadotropin-releasing hormone (GnRH) structure and its receptor
It is evident now that the gonadotropin-releasing hormone (GnRH) structure was already in existence very early in the evolution of animals and was co-opted in diverse ways to regulate reproduction. During 600 million yea...
Gastrointestinal tract response and growth performance of growing turkeys as influenced by the whole wheat content of diets in two feeding programmes
The objective of this study was to determine the physiological responses and growth performance of turkeys fed 20% whole wheat (WW) in two feeding programmes, diets A and B, consistent with the NRC (1994) and B.U.T. (201...