Ji Zheng, Bi Wenzhi, Lin Miao, Yumin Hao, Xu Zhang, Wenxuan Yin, Jinhong Pan, Zengqiang Yuan, Bo Song, Guangju Ji
We examined the role and molecular mechanism of cADPR action on Ca(2+) spark properties in mouse bladder smooth muscle. Dialysis of cADPR with patch pipettes increased frequency and amplitude of spontaneous transient out currents (STOCs) to 6.1+/-0.87 currents/min from 1.2+/-0.36 currents/min (control) and to 179.8+/-48.7pA from 36.4+/-22.6pA (control), respectively, in wildtype (WT) cells, and the effects of cADPR on STOCs were significantly blocked by JVT-591, a RYR2 stabilizer. In contrast, no significant changes were observed in FKBP12...
May 2010: Cell Calcium