Stimuli-responsive nanocarriers for precision cation channel therapy.

Cation channels regulate diverse physiological processes, and their dysregulation is implicated in cancer, cardiovascular diseases, and neurological disorders. Although several cation channel modulators are clinically used, their efficacy is often limited by the broad distribution of channel proteins across tissues and cell types. Conventional administration can cause insufficient disease-site selectivity, off-target toxicity, and drug resistance, highlighting the need for precise delivery and on-demand release in cation channel-targeted therapy. Current studies mainly focus on channel biology, pharmacological modulators, or artificial ion channels, whereas delivery strategies that control biodistribution, local exposure, and release or activation kinetics remain less systematically discussed. Stimuli-responsive nanodelivery systems offer a practical approach to improving spatiotemporally regulated cation channel modulation. By responding to disease-associated microenvironmental cues or external stimuli, nanocarriers can enhance local accumulation of channel-related therapeutics and trigger release within specific tissues, cells, or subcellular compartments. This review summarizes physical/chemical/biological-stimuli-responsive nanocarriers for targeted delivery and controlled release of cation channel-modulating agents, discusses artificial ion channels as one class of channel-related therapeutic entities, and outlines key translational challenges. By emphasizing delivery-controlled modulation, this review clarifies how responsive nanocarriers may improve disease-site exposure, reduce systemic interference, and support more precise cation channel-targeted therapies.