title: The role of route of vitamin E administration on the plasma antioxidant activity and lipid peroxidation in newborn calves.
abstract: The aim of our study was to evaluate plasma values of alpha-tocopherol, malondialdehyde (MDA) and antioxidant activity after a single-dose administration of vitamin E as intramuscular injection, oral supplementation and intramuscular injection plus oral supplementation at 4 hr after birth. Thirty calves were bled at birth and assigned to treatments as follows: control (n = 8), intramuscular injection (40 IU/kg, n = 7), oral supplementation (25 IU/kg, n = 7) and intramuscular injection (20 IU/kg) plus oral supplementation (12.5 IU/kg, n = 8). Blood was collected at 12 and 24 hr after birth and plasma alpha-tocopherol, MDA and antioxidant activity values were determined. Results showed that no changes in MDA values were observed after oral administration (P > 0.05). However, antioxidant activity values showed an increase at both 12 (9.57 +/- 0.65 mmol/l) and 24 hr (10.42 +/- 0.54 mmol/l) after birth when compared to control (3.73 +/- 0.75 mmol/l). Injection with or without oral supplementation increased serum antioxidant activity values at 12 (about 102%, 46%) and 24 hr (94%, 115%) after birth, when compared to control. In addition, MDA values were found to be lower in those animals receiving an injection of vitamin E or injection plus oral supplementation of vitamin E as compared to control at both time-points (P < 0.001). Injection of vitamin E provided beneficial effects to plasma antioxidant activity and MDA values. Therefore, injection may be the best method of vitamin E administration in newborn calves for protecting them in the stressful postnatal condition.
authors.affiliation: Clinical Sciences, Faculty of Vetinary Medicine, University of Tehran, Tehran, Iran.
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Mokhber-Dezfouli
authors.forename: Edris
authors.initials: E
authors.lastname: Rahimikia
authors.forename: Farzad
authors.initials: F
authors.lastname: Asadi
authors.forename: Mohammad Gholi
authors.initials: MG
authors.lastname: Nadalian
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000831:Animals, Newborn; D000975:Antioxidants / Q000008:administration & dosage / Q000494:pharmacology*; D002417:Cattle; D007273:Injections, Intramuscular; D015227:Lipid Peroxidation / Q000187:drug effects*; D008315:Malondialdehyde / Q000378:metabolism; D013997:Time Factors; D014810:Vitamin E / Q000008:administration & dosage / Q000494:pharmacology*; D024502:alpha-Tocopherol / Q000097:blood
chemical_list: D000975:Antioxidants; D014810:Vitamin E; D008315:Malondialdehyde; D024502:alpha-Tocopherol