Influence of dietary boron supplementation on some serum metabolites and egg-yolk cholesterol in laying hens.
The influence of dietary boron (B) supplementation on some serum parameters and egg-yolk cholesterol was studied in laying hens. A total of 224 eighteen-week-old hens of the Hyline Brown 98 strain were assigned to 7 groups with 4 replicates of 8 hens each after 10 days of adaptation, and they were fed commercial diets supplemented with 0, 5, 10, 50, 100, 200 or 400 mg/kg (diet) B (H3BO3) for 8 weeks. Serum gamma-glutamyl transpeptidase (GGT) activity, albumin, glucose, total cholesterol, HDL- and LDL-cholesterol levels were decreased with all B levels. Except in the group receiving 5 mg/kg B supplementation, decreases were found in serum triglycerides in all groups. Serum aspartate aminotransferase (AST) activity was decreased in the groups receiving 100 mg/kg or higher levels of B. All levels of B supplementation increased lactate dehydrogenase (LDH) activity at weeks 21 and 22, while 10 mg/kg or higher levels of B increased serum globulin, urea and egg-yolk cholesterol levels. The results demonstrate that B supplementation at levels exceeding 5 mg/kg affects serum biochemical parameters and increases egg-yolk cholesterol in laying hens.
Eren
M
M
Department of Biochemistry, Faculty of Veterinary Medicine, University of Erciyes, Sümer Mah. Bariş Manço Cad., 38090 Kayseri, Turkey. erenmeryem@hotmail.com
Uyanik
F
F
D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D001888:Boric Acids / Q000008:administration & dosage*; D002645:Chickens / Q000097:blood / Q000378:metabolism*; D002784:Cholesterol / Q000378:metabolism; D019587:Dietary Supplements; D004530:Egg Yolk / Q000378:metabolism*; D005260:Female; D007770:L-Lactate Dehydrogenase / Q000097:blood; D005723:gamma-Glutamyltransferase / Q000097:blood
D001888:Boric Acids; D002784:Cholesterol; D007770:L-Lactate Dehydrogenase; D005723:gamma-Glutamyltransferase; D001219:Aspartate Aminotransferases; C032688:boric acid