“Furthermore, preincubation with PA blocked the subsequent Ca2+ response to H2O2 , and the incubation with H2O2 also blocked the PA-induced rise of [Ca2+] i .”
“Thus, it was suggested that PA stimulated Ca2+ release from PA-sensitive, but not inositol 1,4,5-trisphosphate-sensitive, Ca2+ stores by the activation of RhoA and intracellular H2O2.”