Boric acid inhibits CPA (10 µM) induced Ca²⁺ release from the ER in DU-145 cells.

<p>Cells were tested with CPA+BA followed by CPA. A. Consecutive applications of CPA did not alter Ca²⁺ release (n = 6, NS). B. 0.1 µM M BA did not inhibit CPA stimulated Ca²⁺ release (n = 6, NS). C. 1.0 µM BA inhibited CPA stimulated Ca²⁺ release (n = 6, **p = 0.0037). D. 10 µM BA inhibited CPA stimulated Ca²⁺ release (n = 6, ***p<0.0001).