id author title date pages extension mime words sentences flesch summary cache txt cord-257587-xjoyrdhj Gunaratne, Gihan S. A screening campaign in sea urchin egg homogenate as a platform for discovering modulators of NAADP-dependent Ca2+ signaling in human cells 2018-11-30 .txt text/plain 7599 448 52 Here, we have performed a pilot screen for novel modulators of NAADP-sensitive Ca 2+ release in the sea urchin egg homogenate system and assessed tractability of the resulting 'hits' against both endogenous NAADP-evoked Ca 2+ responses and a pseudotyped MERS-CoV translocation assay in human cell lines [25] . Fangchinoline, an inhibitor of NAADPevoked Ca 2+ signals and MERS pseudovirus translocation in a human cell line [25] , decreased the magnitude of NAADP-evoked Ca 2+ release (peak amplitude 47 ± 2% of control response, blue traces in Fig. 1A ) with lesser effects on the size of IP 3 or cADPR-evoked Ca 2+ transients (Fig. 1A) . These final activities (steps '3' and '4') encompassed: (i) counter-screening for more generalized actions against acidic Ca 2+ stores, for example lysosomotropism [28, 29] , (ii) quantifying effects on NAADP-evoked Ca 2+ signals evoked by single cell microinjection of NAADP, and (iii) correlating effects on Ca 2+ release with bioactivities in the MERS pseudovirus translocation assay. ./cache/cord-257587-xjoyrdhj.txt ./txt/cord-257587-xjoyrdhj.txt