histamine acid phosphate

Histamine phosphate is a potent agonist of histamine receptors and a vasodilatory neurotransmitter. It can activate nitric oxide synthase and is commonly used to induce gastric ulcer models.

trans-Ned 19 is a nicotinic acid adenine dinucleotide phosphate (NAADP) antagonist and two-pore channel (TPC) blocker. It binds with high affinity to the NAADP receptor to inhibit NAADP-dependent lysosomal/endolysosomal calcium release without affecting IP3 or cADPR-mediated calcium signaling pathways. Functionally, trans-Ned 19 inhibits glucose-induced calcium oscillations in pancreatic islets and low histamine concentration-induced endothelium-dependent vasodilation, and reduces Ebola virus infection of host cells. In immunomodulation, NAADP signaling blockade by trans-Ned 19 promotes the conversion of mouse Th17 cells to regulatory T cells (Tregs) and shows protective effects in intestinal inflammation models.