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Rac1 promoted the proliferation of H9c2 cells during serum deficiency. The CCK-8 assay was performed to detect the viabilities of H9c2 cells and the cells were cultured in 10% and 0% serum conditions as indicated for 0-4 days after transfection for 48h. OD values standardized to day0 were considered to present the results. *P < 0.05 vs si-NC group.
