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Alpha blockers, also known as α-blockers or α-adrenoreceptor antagonists, are a class of pharmacological agents that act as antagonists on α-adrenergic receptors (α-adrenoceptors). [2] Historically, alpha-blockers were used as a tool for pharmacologic research to develop a greater understanding of the autonomic nervous system.
The tetracyclic antidepressants mianserin and mirtazapine are α 2 blockers, although their efficacy as antidepressants may come from their activity at other receptor sites. [citation needed] Mechanistically, α 2 blockers increase adrenergic, dopaminergic and serotonergic neurotransmitters and induce insulin secretion, decreasing blood sugar ...
Alpha 1 blocker exerts its action on alpha-1 receptor, dilating the smooth muscles. [3] Alpha-1 receptor is a Gq type G-protein coupled receptor . [ 3 ] When it is activated, it will lead to activation of phospholipase C , raising the intracellular level of IP3 and DAG . [ 3 ]
Alpha 2 blockers. Alpha 2 blockers inhibit the activation of adenylyl cyclase via Gi protein by antagonising alpha 2 receptors, which curbs the synthesis of cyclic AMP (cAMP). [1] This subsequently reduces the concentration of calcium and the release of neurotransmitters, resulting in smooth muscle dilation. [1] Beta 1 blockers
α-Tocopherol (alpha-tocopherol) is a type of vitamin E.Its E number is "E307". Vitamin E exists in eight different forms, four tocopherols and four tocotrienols.All feature a chromane ring, with a hydroxyl group that can donate a hydrogen atom to reduce free radicals and a hydrophobic side chain, along with an aromatic ring is situated near the carbonyls in the fatty acyl chains of the ...
α-Tocopheryl acetate (alpha-tocopherol acetate), also known as vitamin E acetate, is a form of vitamin E with D-Alpha Tocopheryl Acetate as the natural form and DL-Alpha Tocopheryl Acetate as the synthetic form. DL-indicates the synthetic form where as D- indicates the natural form.
Alpha-1 blocker, blocks alpha receptors and it relaxes the smooth muscles in the bladder. It helps the urine to flow smoothly and it can lessen the pain caused by the bladder pressing on the prostate. [44] [45] Selective alpha-1 blockers are better tolerated than non-selective alpha blockers in the body and therefore works better on BPH. [2]
Vitamin E deficiency in humans is a very rare condition, occurring as a consequence of abnormalities in dietary fat absorption or metabolism rather than from a diet low in vitamin E. [1] Collectively the EARs, RDAs, AIs and ULs for vitamin E and other essential nutrients are referred to as Dietary Reference Intakes (DRIs). [1]