Correlation of SERCA expression with caveolin-1, caveolin-3, α1-H and actin expression in human failing hearts. Caveolin-1, caveolin-3, SERCA, α1-H and actin expression were measured in 5 normal human hearts and 19 hearts from heart failure patients. GAPDH-normalized SERCA expression in each heart was compared to the expression of other proteins by multiple regression analysis. Scatter plots with correlation trend bars indicated the following p values: Serca vs Caveolin-3, p<0.05. Serca vs Caveolin-1, p=0.34; Serca vs α1-H, p=0.60; Serca vs actin, p=0.61.