Related Experiment Video
Updated: Jan 6, 2026

An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells
Published on: May 21, 2019
MiRNA-206 inhibits proliferation of renal clear cell carcinoma by targeting ZEB2
1Department of Nephropathy, Traditional Chinese Medicine Hospital of Rizhao City, Rizhao, China. caoweili56@126.com.
Objective:
The purpose of this study was to investigate the effect of microRNA-206 on the malignant progression of renal clear cell carcinoma (RCC). In addition, whether microRNA-206 could regulate ZEB2 expression and the underlying mechanisms was also explored.
Patients And Methods:
Quantitative Real Time-Polymerase Chain Reaction (qRT-PCR) was performed to examine microRNA-206 level in 46 tumor tissue specimens and adjacent ones of RCC patients. Also, the relationship between microRNA-206 expression and clinical indicators of RCC was analyzed. The negative control (NC) and microRNA-206 mimics were transfected into RCC cell lines, and the transfection efficiency was verified by qRT-PCR. The effects of microRNA-206 on the proliferation and apoptosis of RCC cells were analyzed by cell counting kit-8 (CCK-8), clone formation, and flow cytometry assays. Finally, the regulation of microRNA-206 on the downstream gene ZEB2 was indicated by Western Blot and cell recovery experiments.
Results:
qRT-PCR results showed that the expression level of microRNA-206 in tumor tissue samples of RCC patients was remarkably lower than that in adjacent normal tissues, and the difference was statistically significant. Meanwhile, compared with patients with high expression of microRNA-206, the pathological stage of patients with low expression of microRNA-206 was higher, and the overall survival rate was lower. In the RCC cell lines (Caki-1 and Caki-2), the cell proliferation ability of the microRNA-206 overexpression group was remarkably weakened, while the cell apoptosis rate was oppositely enhanced when compared with the NC group. In addition, this study demonstrated that ZEB2 expression was remarkably increased in RCC cells as well as tissues and was negatively correlated with microRNA-206 expression. At the same time, microRNA-206 mimics was found remarkably reduced in the expression of proteins in ZEB2-related signaling pathway, including ZEB2, β-catenin, cyclinD1, c-Myc, MMP-2, and MMP-9. In the cell reverse experiment, the overexpression of ZEB2 was found to be able to counteract the impact of microRNA-206 mimics on RCC cell proliferation and apoptosis and thus, participated in the malignant progression of RCC.
Conclusions:
This study revealed that microRNA-206 was remarkably associated with the pathological stage and poor prognosis of RCC patients. In addition, microRNA-206 might inhibit the malignant progression of RCC by regulating the targeted ZEB2.
Insights
MicroRNA-206 is downregulated in renal clear cell carcinoma (RCC), correlating with advanced stages and poorer survival. Upregulating microRNA-206 inhibits RCC cell proliferation and promotes apoptosis by targeting ZEB2, suggesting its role as a tumor suppressor.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Renal clear cell carcinoma (RCC) is the most common subtype of kidney cancer.
- Understanding the molecular mechanisms driving RCC progression is crucial for developing effective therapies.
Purpose of the Study:
- To investigate the role of microRNA-206 in the malignant progression of RCC.
- To determine if microRNA-206 regulates ZEB2 expression and its underlying mechanisms.
Main Methods:
- Quantitative Real-Time Polymerase Chain Reaction (qRT-PCR) to assess microRNA-206 levels in RCC tissues.
- Cell culture experiments involving microRNA-206 mimics transfection to evaluate effects on proliferation and apoptosis.
- Western Blot analysis to examine ZEB2 protein expression and downstream signaling pathways.
Main Results:
- MicroRNA-206 expression was significantly lower in RCC tissues compared to adjacent normal tissues.
- Low microRNA-206 expression correlated with higher pathological stage and poorer overall survival in RCC patients.
- Overexpression of microRNA-206 inhibited RCC cell proliferation, enhanced apoptosis, and reduced ZEB2 expression and related signaling pathway proteins.
Conclusions:
- MicroRNA-206 is associated with pathological stage and prognosis in RCC.
- MicroRNA-206 may suppress RCC malignant progression by targeting ZEB2.
Related Concept Videos
MicroRNAs
MicroRNAs
Abnormal Proliferation
Inhibition of Cdk Activity
The Retinoblastoma Gene
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...

