Trans-Ned 19 is a NAADP antagonist and TPC blocker. trans-Ned 19 suppresses the calcium signal and the rat aorta relaxation in response to low histamine concentrations. trans-Ned 19 increases the spontaneous acrosome reaction rate, alleviates anti-CD3 mAb-induced intestinal inflammation, and improves kidney damage in mice with nephrotoxic serum nephritis[1][2][3][4][5][6].