... Ca2+ in ux Effect of EPCG, catechin hydrate, curcumin, apigenin, naringenin and gallotannin on QUIN-induced intracellular Ca2+ in cultured human neurons As mentioned above, QUIN stimulation induced ... curcumin, apigenin, naringenin and gallotannin on QUIN-induced nNOS activity and extracellular nitrite production in human neurons Effect of EPCG, catechin hydrate, curcumin, apigenin, naringenin ... Effect of polyphenols on intracellular NAD+ levels, PARP activation and cell death in human neurons Effect of: (A) EPCG, catechin hydrate, curcumin, apigenin, naringenin and gallotannin on intracellular...