PMID: 3487685Apr 1, 1986Paper

Vitamin E supplementation suppresses prostaglandin E1(2) synthesis and enhances the immune response of aged mice

Mechanisms of Ageing and Development
S N MeydaniK C Hayes

Abstract

The potential for vitamin E to modulate prostaglandin metabolism and alter immune response in aged mice was studied. Semi-purified diets containing 30 ppm or 500 ppm dl-alpha-tocopheryl acetate (VitE) were fed for 6 weeks to young (3 months) and old (24 months) C57BL/6J mice. Delayed hypersensitivity skin test to DNFB and the proliferative response of splenocytes to T- and B-cell mitogens were assessed. Ex-vivo synthesis of Prostaglandin E2 (PGE2) was measured in spleen homogenates and serum vitamin E was measured by HPLC. Vitamin E supplementation of aged mice enhanced percent ear swelling to DNFB as well as the mitogenic response of splenocytes to Con A and LPS (P less than 0.05). Furthermore, spleen homogenates from old mice fed 30 ppm VitE had a significantly higher PGE2 level than young mice fed 30 ppm VitE and old mice fed 500 ppm VitE (3.20 +/- 0.07 micrograms/g vs. 2.60 +/- 0.08 and 2.3 +/- 0.10, respectively). Thus, the vitamin E enhanced immune response of aged mice appears to be mediated by decreased prostaglandin synthesis.

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