LRRC8A is an essential component of the volume-regulated anion channel (VRAC), functioning as a key regulator of cellular volume homeostasis and ion transport across cell membranes 1. The protein forms functional channels that conduct chloride and other anions in response to osmotic changes, requiring hetero-oligomerization with other LRRC8 family members for optimal channel characteristics 1. Beyond its canonical volume regulation role, LRRC8A serves diverse physiological functions including facilitating platinum drug uptake for cancer therapy, where NAA60-mediated N-terminal acetylation is crucial for proper channel function 2. In immune responses, LRRC8A/C complexes transport cyclic GMP-AMP (cGAMP) between cells, enhancing CD8 T cell responses to radiotherapy through STING pathway activation 3. The channel also regulates platelet activation and thrombosis by mediating ATP release and calcium signaling 4. In pathological contexts, LRRC8A contributes to inflammatory responses, with upregulation observed in allergic rhinitis promoting NADPH oxidase-mediated mitochondrial dysfunction 5 and facilitating NLRP3 inflammasome activation in crystal-induced joint inflammation 6. Conversely, LRRC8A deletion in endothelial cells protects against blood-brain barrier disruption following ischemic stroke 7, while maintaining endothelial LRRC8A expression delays vascular aging through AMPK-SIRT1 signaling 8.