Effects of baicalein (BE) on lysoPC-induced Ca
responses. Typical curves of H9c2 cells which were pretreated by BE (0.1 to 100 μM) or catalase (100 μM) 5 min before stimulation with 50 μM lysoPC in calcium-containing buffer. The lower panel indicates the influence of BE and catalase on the variations in [Ca2+]i measured at the peak and expressed as [Ca2+]i (i.e., after subtraction of the respective baseline values). Pretreatment with BE and catalase had inhibitory effects on increased [Ca2+]i induced by lysoPC. Arrows indicate the time points of adding lysoPC, n = 4–6. **P < 0.01 versus cells exposed to lysoPC alone.