Objective: To determine the influence of v-raf murine sarcoma viral oncogene homolog B1 (BRAF) interference on SW579 cell lines in thyroid cancer.
Methods: We designed 2 pairs of siRNA interference sequences, transfected them into SW579 cell line with liposome, and detected the interference with RT-PCR method. For successfully interfered cell lines, the changes in cell proliferation, cell cycle, and the expression of related proteins in mitogen-activated protein signal-regulated kinase /extracellular signal-regulated kinase (MEK/ ERK) signal pathway were detected.
Results: After 2 pairs of siRNA transfection, the expressions of BRAF mRNA and protein of SW579 cell lines were significantly inhibited (P<0.01). The proliferation was inhibited, the cell cycle was changed, G1/S phase increased, and MEK/ERK signal pathway was inhibited.
Conclusion: Inhibition of growth and proliferation of SW579 cell lines by BRAF may be functioned by de-activating MEK/ERK signal pathway.