Effect of IMPDH1 knockdown on biological behavior of human colon cancer SW480 and HT29 cells
Objective:To investigate the effect of IMPDH1 knockdown on the biological behavior of human colon cancer SW480 and HT29 cells.Methods:The expression of IMPDH1 gene in the human normal colon mucosal cell line FHC and the human colon cancer cell lines SW480 and HT29 was detected by qRT-PCR. Small interfering RNAs (siRNAs) was used to knock down the expression of IMPDH1 in SW480 and HT29 cells, and the mRNA and protein expression levels of IMPDH1 in SW480 and HT29 cells were detected by qRT-PCR and Western blot, respectively, to verify the transfection effects. MTT, Transwell, and scratch healing assays were performed to detect the effects of IMPDH1 gene knockdown on the proliferation, invasion, and migration of SW480 and HT29 cells.Results:IMPDH1 was expressed in FHC, SW480, and HT29 cells, and the expression of IMPDH1 in SW480 and HT29 cells was higher than that in FHC cells. After siRNA transfection of SW480 and HT29 cells, the mRNA and protein expression levels of IMPDH1 were significantly reduced compared with those of the control group (P＜0.05). MTT assay showed that IMPDH1 knockdown inhibited the proliferation of SW480 and HT29 cells in vitro (P＜0.01). Transwell assay showed that IMPDH1 knockdown inhibited the invasiveness of SW480 and HT29 cells in vitro (P＜0.05). The scratch healing assay showed that IMPDH1 knockdown inhibited the migration ability of SW480 and HT29 cells (P＜0.05).Conclusion:IMPDH1 expression in SW480 and HT29 cells is higher than that in FHC cells. IMPDH1 could inhibit the proliferation, invasion, and migration of SW480 and HT29 cells in vitro.
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