In the human colorectal cancer cell line HT29, the expression of Orai3, as well as Orai1, Orai2, STIM1, and TRPC1 has been shown to be enhanced as compared to the normal human colon mucosal epithelial cell line NCM460, whereas STIM2 expression was downregulated in cancer cells [54]. Here, ORAI1 is linked to cancer.