Fig. 4

Effect of tubular cell secretome on F-actin expression in renal fibroblasts. After 24-h incubation with or without secretome derived from control or COM-treated HK-2 or MDCK cells, F-actin expression in BHK-21 cells was examined by fluorescence staining using Oregon Green 488-conjugated phalloidin. (A) and (C): Fluorescence micrographs of F-actin (in green) and nuclei (in blue) in BHK-21 cells treated with secretome derived from HK-2 and MDCK cells, respectively. (B) and (D): Fluorescence intensity data were analyzed from at least 100 cells in ≥ 10 random high-power fields (HPFs) per each sample. Each bar represents mean ± SD of measurements in each dataset (derived from three independent experiments using different biological replicates). Only significant p values are labeled. AU  arbitrary unit.