Abstract

Objective In this paper, we study the role of the VHL gene in regulating the proliferation and apoptosis of renal cell carcinoma, as well as the safety and transfection efficiency of ultrasound microbubble gene transfection technology. Method We use kidney cancer cell lines as an in vitro research object and apply ultrasound microbubble gene transfection technology to transfect the VHL gene into kidney cancer cell line (786-0). The proliferation and apoptosis of cells were measured to clarify the inhibitory effect of the VHL gene in renal cell carcinoma. After that, pEGFP-VHL was transfected using ultrasonic microbubble and liposome gene transfection techniques, respectively, and the transfection efficiency was measured by immunofluorescence. Results Compared with untreated and 786-0 cells that are transfected with empty vector, the expression level of VHL gene mRNA in 786-0 cells that are transfected with pcDNA3.1-VHL was significantly increased, and the cell growth inhibition rate was significantly higher. The rate of apoptosis increased significantly. Transfection efficiency of the pEGFP-VHL gene after transfection of 786-0 cells for 48 h: control group 0, liposome group (35.55 ± 2.77) %, ultrasound microbubble group (18.27 ± 2.83) %, and two transfection methods on cells. There is no significant difference in the impact of vitality. Conclusion VHL gene expression can significantly inhibit the proliferation ability of renal cancer cell line 786-0 and promote its apoptosis. VHL gene is a potential target for gene therapy of kidney cancer.

Highlights

  • Renal cell carcinoma that is abbreviated as RCC, referred to as kidney cancer, accounts for 2-3% of all adult malignant tumors

  • The Von Hippel-Lindau (VHL) gene suppresses the formation of the transcription elongation factor Elongin complex through protein VHL (pVHL) and regulates the expression of cell growth-related genes. pVHL is related to cell proliferation, apoptosis, and tumor infiltration and metastasis

  • Compared with untreated and transfected 786-0 cells with pcDNA3.1(+), the expression level of VHL gene mRNA in 786-0 cells transfected with pcDNA3.1VHL was significantly increased (P < 0:05): untreated and transfected

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Summary

Introduction

Renal cell carcinoma that is abbreviated as RCC, referred to as kidney cancer, accounts for 2-3% of all adult malignant tumors. The incidence of kidney cancer involves multiple genes, of which the Von Hippel-Lindau (VHL) gene is most closely related to kidney cancer. VHL gene has the functions of regulating transcription, regulating cell cycle, and stabilizing cell growth-related genes. The VHL gene suppresses the formation of the transcription elongation factor Elongin complex through pVHL and regulates the expression of cell growth-related genes. PVHL is related to cell proliferation, apoptosis, and tumor infiltration and metastasis. VHL gene mutation, deletion, and hypermethylation are closely related to the occurrence of renal cell carcinoma. Research has found [2] that the VHL genehypoxia-inducible factor-hypoxia response gene pathway (VHL-HIF-HRG pathway) plays an important role in kidney cancer

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