TRPV6 is a highly Ca
2+-selective epithelial channel that mediates apical Ca
2+ entry during transcellular intestinal calcium absorption
[1]. Mechanistically, TRPV6 supports calcium homeostasis under calcium restriction and contributes to bone mineralization in mouse models
[2]. In disease research, TRPV6 variants disrupt maternal-fetal calcium transport in transient neonatal hyperparathyroidism and associate with early-onset chronic pancreatitis
[3][4]. Compared with TRPV5, TRPV6 shares epithelial Ca
2+-channel properties but shows broader tissue distribution, whereas TRPV5 is mainly linked to renal Ca
2+ reabsorption
[5]. In cancer models, TRPV6 expression correlates with prostate cancer progression, supports prostate cancer cell survival through Orai1-dependent plasma-membrane trafficking, and represents a target in estrogen receptor-negative breast cancer
[6][7][8]. For experimental applications, TRPV6 antagonists include SOR-C13/SOR-C27 peptides for detecting TRPV6-rich tumors, SOR-C13 evaluated in a phase I solid-tumor trial, and PCHPD inhibitors that block TRPV6 with nanomolar affinity
[9][10][11].