Figure 6.
PKC inhibitors prevent decrease of benzamil-sensitive Isc by UTP. (A) Representative trace showing the benzamil-sensitive current in the absence or presence UTP (5 μM), and after pretreatment with both Gö6983 (10 μM) and UTP, (n = 8, 14, and 9, respectively, N = 3). (B) Bar graph illustrating the benzamil-sensitive current after benzamil only (5 μM, n = 8), after UTP (5 μM, n = 14), after PMA (0.5 μM, n = 4), after UTP in the presence of Gö6983 (10 μM, n = 9), after UTP in the presence of rottlerin (2.5 μM, n = 5), after UTP in the presence of Gö6976 (100 nM, n = 6 and 10 μM, n = 4, respectively), or after UTP in the presence of the cell permeable, myristoylated PKC inhibitor 20–28 (10 μM, n = 4). Asterisk indicates significant differences compared with the benzamil-sensitive current after UTP. The benzamil-sensitive currents following pretreatment with rottlerin and Gö6983 (a nonselective PKC inhibitor) were not significantly different from benzamil treatment alone.