Vitamin E supplementation and stress affect tissue alpha-tocopherol content of beef heifers.

摘要: The effect of stress on tissue alpha-tocopherol was investigated in 16 crossbred heifers fed a corn/corn silage-based diet. For 28 d, eight (379 +/- 10 kg BW) received dietary supplement 1,000 IU dl-alpha-tocopheryl acetate, whereas the controls (375 no supplemental vitamin E. Tissue samples plasma, red blood cells, liver, trapezius, and longissimus muscles subcutaneous fat immediately dorsal to each muscle were taken d 1 for determination concentration. On 2 through 4 heifer restricted 2.61 grass hay allowed water. 5, 6, 7 feed or water given, 100 ACTH .0024 mg epinephrine/kg BW given every 8 h, biopsies content again 7. reduced (P < .01) mean BW, increased serum cortisol, creatine kinase, urea. After stress, E .13) increase kinase relative that not supplemented with Stress also .04) Se fortified Alpha-tocopherol trapezius by treatment plasma those it .05) nonsupplemented E-deficient heifers. decreased cell liver cattle concentrations only when diet adequate fed. In addition, most sampled tissues, did affect concentrations.