Cardiovascular Effects Mediated by Imidazoline Drugs: an Update.

Cardiovascular Effects Mediated by Imidazoline Drugs: an Update. Cardiovasc Hematol Disord Drug Targets. 2018 Jun 29;: Authors: Cobos-Puc LE, Aguayo-Morales H Abstract Clonidine is a centrally acting antihypertensive drug. Hypotensive effect of clonidine is mediated mainly by central a2-adrenoceptors and/or imidazoline receptors located in a complex network of the brainstem. Unfortunately, clonidine produces side effects such as sedation, mouth dry, and depression. Moxonidine and rilmenidine, compounds of the second generation of imidazoline drugs, with fewer side effects, display a higher affinity for the imidazoline receptors compared with a2-adrenoceptors. The antihypertensive action of these drugs is due to inhibition of the sympathetic outflow primarily through central I1-imidazoline receptors in the RVLM, although others anatomical sites and mechanisms/receptors are involved. Agmatine is regarded as the endogenous ligand for imidazoline receptors. This amine modulates the cardiovascular function. Indeed, when is administered in the RVLM mimic the hypotension of clonidine. Recent findings have shown that imidazoline drugs also exerts biological response directly on the cardiovascular tissues, which can contribute to their antihypertensive response. Currently, new imidazoline receptors ligands are in development. In the present review, we provide a brief update on the cardiovascular effects of clonidine, moxonidine, rilmenidine, ...
Source: Cardiovascular and Hematological Disorders Drug Targets - Category: Drugs & Pharmacology Tags: Cardiovasc Hematol Disord Drug Targets Source Type: research