OBJECTIVE: To determine concentrations of alpha-tocopherol in serum and CSF of healthy horses following administration of supplemental vitamin E in feed. ANIMALS: 10 healthy adult horses. PROCEDURES: Horses were allocated to receive supplemental d-alpha-tocopherol (1,000 U/d [group A; n=5] or 10,000 U/d [group B; 5]) in feed for 10 days. Blood samples were collected before (baseline), during, and at intervals for 10 days after discontinuation of vitamin E administration for assessment of serum alpha-tocopherol concentration. Cerebrospinal fluid samples were collected prior to and 24 hours after cessation of vitamin E administration. Alpha-tocopherol concentrations in serum and CSF samples were analyzed via high-performance liquid chromatography; changes in those values during the treatment period were compared between groups, and the relationship of serum and CSF alpha-tocopherol concentrations was evaluated. RESULTS: In both groups, serum alpha-tocopherol concentration increased significantly from baseline during vitamin E administration; values in group B were significantly greater than those in group A during and after treatment. At the end of vitamin E administration, CSF alpha-tocopherol concentration was not significantly greater than the baseline value in either group; however, the increase in CSF concentration was significant when the group data were combined and analyzed. Serum and CSF alpha-tocopherol concentrations were significantly correlated at baseline for all horses, but were not strongly correlated after 10 days of vitamin E administration. CONCLUSIONS AND CLINICAL RELEVANCE: In healthy horses, daily oral administration of supplemental vitamin E in feed resulted in increases in serum and CSF alpha-tocopherol concentrations.
OBJECTIVE: To determine concentrations of alpha-tocopherol in serum and CSF of healthy horses following administration of supplemental vitamin E in feed. ANIMALS: 10 healthy adult horses. PROCEDURES: Horses were allocated to receive supplemental d-alpha-tocopherol (1,000 U/d [group A; n=5] or 10,000 U/d [group B; 5]) in feed for 10 days. Blood samples were collected before (baseline), during, and at intervals for 10 days after discontinuation of vitamin E administration for assessment of serum alpha-tocopherol concentration. Cerebrospinal fluid samples were collected prior to and 24 hours after cessation of vitamin E administration. Alpha-tocopherol concentrations in serum and CSF samples were analyzed via high-performance liquid chromatography; changes in those values during the treatment period were compared between groups, and the relationship of serum and CSF alpha-tocopherol concentrations was evaluated. RESULTS: In both groups, serum alpha-tocopherol concentration increased significantly from baseline during vitamin E administration; values in group B were significantly greater than those in group A during and after treatment. At the end of vitamin E administration, CSF alpha-tocopherol concentration was not significantly greater than the baseline value in either group; however, the increase in CSF concentration was significant when the group data were combined and analyzed. Serum and CSF alpha-tocopherol concentrations were significantly correlated at baseline for all horses, but were not strongly correlated after 10 days of vitamin E administration. CONCLUSIONS AND CLINICAL RELEVANCE: In healthy horses, daily oral administration of supplemental vitamin E in feed resulted in increases in serum and CSF alpha-tocopherol concentrations.
Authors: Carrie J Finno; Matthew H Bordbari; Giuliana Gianino; Brittni Ming-Whitfield; Erin Burns; Janel Merkel; Monica Britton; Blythe Durbin-Johnson; Erica A Sloma; Marissa McMackin; Gino Cortopassi; Victor Rivas; Marietta Barro; Cecilia K Tran; Ingrid Gennity; Hadi Habib; Libin Xu; Birgit Puschner; Andrew D Miller Journal: Free Radic Biol Med Date: 2018-03-09 Impact factor: 7.376
Authors: C J Finno; K E Estell; S Katzman; L Winfield; A Rendahl; J Textor; D L Bannasch; B Puschner Journal: J Vet Intern Med Date: 2015-09-22 Impact factor: 3.333