Acid-sensing ion channels(ASICs) are a novel class of ligand-gated cation channels activated by extracellular acidification and belong to the epithelial sodium channels(DEG/ENaC) superfamily.Their biological functions have recently been found not only in the central nervous system but also relevant to the physiology and pathology of non-neuronal tissues such as taste buds, cardiovascular system and bones.This review concerns the latest research on the expression and functions of ASICs in non-neuronal tissues so as to promote the understanding of their physiological and pathological functions.