RhoC regulates the proliferation of gastric cancer cells through interaction with IQGAP1

Influence of phosphatase of regenerating liver 3 on cell migration, invasion and expression of RhoC in SGC7901 cells

AIM: To explore whether phosphatase of regenerating liver 3 (PRL-3) and RhoC belong to the same signal pathway in the mechanism of SGC7901 cell migration and invasion by observing the influence of PRL-3 on cell migration, invasion and the expression of RhoC in SGC7901 cells.

METHODS: Human gastric cancer SGC7901 cells were cultured in vitro and treated with different concentrations of PRL-3Ab (1:600, 1:400 and 1:200), then the migration distance of SGC7901 cells was assessed at different time points (0, 12, 24, 48 h) by wound healing assay, and the migration and invasion of SGC7901 cells were examined by Transwell assay at 48 h. The expression of RhoC mRNA and protein was detected by real-time PCR and ELISA.

RESULTS: Compared with the control group, the migration distance of SGC7901 cells at 12, 24 and 48 h decreased with the increase in PRL-3Ab concentration. At 48 h, the migration and invasion of SGC7901 cells and the expression of RhoC mRNA and protein in SGC7901 cells treated with different concentrations of PRL-3Ab (1:600, 1:400 and 1:200) were significantly lower than those in the control group (migration: 365.0 ± 5.0, 165.3 ± 5.0, 90.3 ± 5.5 vs 512.3 ± 4.9; invasion: 321.3 ± 6.1, 179.0 ± 6.1, 75.7 ± 4.0 vs 545.3 ± 5.0; expression of RhoC mRNA: 0.910 ± 0.022, 0.742 ± 0.018, 0.539 ± 0.015 vs 1.000 ± 0.000; expression of RhoC protein: 1130.77 g/mL ± 15.32 g/mL, 981.52 g/mL ± 14.44 g/mL, 893.03 g/mL ± 11.10 g/mL vs 1212.42 g/mL ± 18.37 g/mL; P < 0.01 for all).

CONCLUSION: PRL-3 can promote SGC7901 cell migration and invasion and raise the expression of RhoC, which suggests that PRL-3 and RhoC may belong to the same signal pathway in the mechanism of SGC7901 cell migration and invasion.