Influence of SOX7 gene methylation on the proliferation, migration and invasion of renal cancer cells and its clinical value / 国际生物医学工程杂志

ABSTRACT

Objective:To study the clinical value of SRY-Box transcription factor 7 ( SOX7) gene methylation in renal cancer and its effect on the biological behavior of renal cancer cells. Methods:80 patients with renal cancer (the kidney cancer group) and 50 patients with benign renal disease (the control group) were selected as the research subjects. Synthetic oligonucleotide sequences (MON, UMON, and CON) were designed and transfected into A498 renal carcinoma cells. Methyl-specific PCR was used to detect the methylation status of the SOX7 gene in the tumor and adjacent tissue of the kidney cancer group as well as in the renal tissue of the control group. The relationship between SOX7 gene methylation and clinicopathological factors was analyzed. The migration and invasion of A498 renal cancer cells in the MON group, UMON group, and CON group were detected by the Transwell chamber. Results:The SOX7 gene methylation rate in tumor tissue of the kidney cancer group was significantly higher than that of the control group and the adjacent tissue, and the difference was statistically significant (χ 2 = 67.522, P < 0.05). The SOX7 gene is methylated in renal cancer cell lines such as Caki-1, 786-O, 769-P, while it is unmethylated in A498 renal cancer cells. There were no statistical differences in the SOX7 gene methylation rate in the tumor tissue of the renal cancer group in terms of gender, age, or pathological type (all P > 0.05). There were statistical differences in the degree of differentiation, maximum tumor diameter, lymph node metastasis, tumor number, and TNM staging in the renal cancer group in terms of tumor tissue SOX7 gene methylation rate (all P < 0.05). After transfection with MON, the SOX7 gene methylation of A498 renal cancer cells could be successfully induced, and the day-1 to day-7 cell viability, cell migration, and invasion numbers of A498 renal cancer cells in the MON group were significantly higher than those in the UMON group and the CON group ( P < 0.05). Conclusions:Hypermethylation of the SOX7 gene can promote the proliferation, migration, and invasion of renal cancer cells and has important clinical value in the evaluation of the disease and prognosis of renal cancer.