Effect of dietary rare earth elements on growth performance and blood parameters of rats

Journal of Animal Physiology and Animal Nutrition
M L HeW A Rambeck

Abstract

Rare earth elements (REE) have been shown to influence growth performance in animal production, especially in pigs. In the present study, the effect of oral administration of rare earth elements on growing rats was investigated. Pure LaCl3 or an REE mixture containing 38% of LaCl3, 52% of CeCl3, 3% of PrCl3 and 7% of chlorides of other REE were used at two different concentrations as supplements to the diets. Fifty male Wistar rats at 4 weeks of age were allotted to five experimental groups: a control group; a La-low group and a La-high group with 75 and 150 mg/kg LaCl3.6H2O, respectively; a REE-low and an REE-high group with 75 and 150 mg/kg REE mixture, respectively. The animals were housed in individual pens. Feed and water were provided ad libitum. After 18 days the oral supplementation of LaCl3.6H2O or of the REE mixture improved daily body weight gain (BWG) by up to 5 or 9% (p > 0.05), respectively. LaCl3.6H2O as well as the REE mixture had positive effects (p < 0.05) on feed conversion ratio (FCR) with a decreased ratio by up to 8 and 11%, respectively. Supplementation of REE also had clear effects on blood serum parameters. The activities of alkaline phosphatase (AP) and alanine amino transferase (ALT) increased signifi...Continue Reading

Citations

Feb 24, 2001·Archiv für Tierernährung·M L He, W A Rambeck
Mar 27, 2007·Toxicology Letters·Xiao HeYuying Huang
Aug 1, 2012·Journal of Animal Physiology and Animal Nutrition·S J von Rosenberg, U A Wehr
Apr 15, 2009·Journal of Animal Physiology and Animal Nutrition·M L HeW A Rambeck
Jul 9, 2013·Ecotoxicology and Environmental Safety·Binggan WeiTao Liang
Jun 25, 2008·International Immunopharmacology·Hongyan GuXiaotang Wang
Aug 19, 2010·Chemical Society Reviews·Ajay KarakotiWilliam T Self
Apr 27, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·F J Sainz-GonzaloA Fernández-Gutiérrez

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