Cation transport

Cation transport refers to the fundamental biological process of moving positively charged ions across cellular membranes. This essential function is mediated by a diverse array of membrane proteins, including ion channels, transporters, and pumps, which work to maintain cellular homeostasis, membrane potential, and ion gradients. These proteins are crucial for various physiological processes such as nutrient uptake, waste removal, pH regulation, neurotransmission, and renal excretion. Dysregulation of cation transport is implicated in a wide range of diseases, including hypertension, cardiac arrhythmias, kidney disease, cystic fibrosis, and neurological disorders like epilepsy and ischemic stroke. Consequently, specific cation channels and transporters serve as therapeutic targets for numerous drugs. For instance, diuretics target cation-chloride cotransporters to manage hypertension and edema, while other drugs like metformin and memantine interact with organic cation transporters to exert their therapeutic effects. However, targeting these ubiquitous systems can lead to safety concerns such as off-target effects, drug-drug interactions, and potential nephrotoxicity.

Modulation of ion channel activity (e.g., blocking, opening); Inhibition of transporter proteins; Regulation of pump activity