Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2831068 | Molecular Immunology | 2013 | 6 Pages |
α-Tocopherol, the most biologically active member of the vitamin E family of fat soluble compounds, exhibits both antioxidant and anti-inflammatory properties. However, its mechanisms of action are not fully understood. Here, we show that, unlike other antioxidants, α-tocopherol stimulates the production of cyclic adenosine monophosphate (cAMP). Inhibitor studies demonstrate that the prostaglandin EP2 and EP4 receptors and adenylyl cyclases mediate the effects of α-tocopherol on cAMP production. Additionally, we show that α-tocopherol attenuates pro-inflammatory cytokine and chemokine production. This study provides novel evidence that α-tocopherol stimulates cAMP signaling, suggesting a mechanism of action for the immunomodulatory effects of vitamin E.
► Antioxidant survey shows that α-tocopherol stimulates cAMP production. ► cAMP production is mediated by the EP2 and EP4 receptors and adenylyl cyclase. ► α-Tocopherol attenuates PHA induced pro-inflammatory cytokine production.