SN 6 (SN6) is a selective Na+/Ca2+ exchanger (NCX) inhibitor (IC50s of NCX1: 2.9 μM , NCX2: 16 μM ,NCX3: 8.6 μM)

NCX3:8.6 μM, NCX2:16μM , NCX1:2.9μM

Confluent transfectants in 24-well dishes were loaded with Na+ by incubation at 37°C for 40 min in 0.5 ml of balanced salt solution (BSS) (10 mM HEPES/Tris, pH 7.4, 146 mM NaCl, 4 mM KCl, 2 mM MgCl2, 0.1 mM CaCl2, 10 mM glucose, and 0.1% bovine serum albumin) containing 1 mM ouabain and 10 mM monensin. 45Ca2+ uptake was then initiated by switching the medium to Na+ -free BSS (replacing NaCl with equimolar choline chloride) or to normal BSS, both of which contained 0.1 mM 45CaCl2 (370 kBq/ml) and 1 mM ouabain. After a 30-s incubation, 45Ca2+ uptake was terminated by washing cells four times with an ice-cold solution containing 10 mM HEPES/Tris, pH 7.4, 120 mM choline chloride,and 10 mM LaCl3. Cells were then solubilized with 0.1 N NaOH, and aliquots were taken for determination of radioactivity and protein. When present, SN-6 and KB-R7943 were included in the medium 15 min before the start of 45Ca2+ uptake

SN6

H2O: Insoluble

DMSO: 62.5 mg/mL (155.29 mM), Sonication is recommended.

10% DMSO+90% Corn Oil: 2.5 mg/mL (6.21 mM), Sonication is recommended.