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How Drugs and Receptors Interact - Essay Example

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The essay "How Drugs and Receptors Interact" principally addresses drug-receptor interactions, including their mechanism of action and binding processes. In addition, the essay looks into the impacts of potency, specificity, affinity, antagonist, agonists and partial agonist to interaction…
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Download file to see previous pages GABAA receptors are also ligand-gated and ionotropic channels. Upon binding of the drug, such hormones are automatically triggered. Examples of drugs that bind through this mechanism include bicuculline, muscimol, and gaboxadol. b) Ligand-Regulated Transmembrane Enzymes Ligand-Regulated Transmembrane Enzymes are receptor molecules that mediate the early steps of signaling by insulin, growth factor, epidermal growth factor, platelet-derived, transforming growth factor, atrial natriuretic peptide, and many more trophic hormones. They are a type of receptors that are polypeptides in nature and comprise of extra-cellular-hormone-binding domains that bind to a cytoplasmic enzyme. The enzyme can be a tyrosine kinase, a guanylate cyclase or serine. In all these receptors, the two are linked by a polypeptide, a hydrophobic domain that cuts across the lipid layers. Upon binding of the drug (ligand) to the extracellular receptor, the receptor activates monomers to dimmers and the two receptor polypeptides bind strongly to the membrane. The cytoplasmic domains are then phosphorylated on tyrosine residues and their particular enzymatic activities or effects are activated. The tyrosine kinase receptor signaling pathway begins with binding of the drug or ligand to the external domain of the receptor. For example, monoclonal antibodies that act as antagonists of the tyrosine kinase receptors are effective in the management of breast cancer-related with over-expression of the growth factor receptor. ...Download file to see next pagesRead More
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