CASR and triple-negative breast carcinoma: Analysis of the cell viability revealed that most triple-negative breast cancer cells lines (MDA-231, BT-549, HCC1806, and HCC38) with wild-type or mutant CaSR (A986S or Q1011E) grew more efficiently at high Ca2+ than the luminal-A MCF-7 cell line which expresses low levels of the A986S mutant receptor.