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Published on: February 8, 2020
The relationship between RSUME and VHL/HIF-1α signalling pathway in renal cell carcinoma
Yuanliang Wang1, Xin Wang1, Faliang Zhao1
1Departments of Urology, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China.
Introduction:
Renal cell carcinoma (RCC) is characterised by loss of the von Hippel-Lindau tumour suppressor gene (VHL), and the functional tumourigenic consequences of this loss have been used to develop therapies for advanced renal cell carcinoma, such as targeting activation of the HIF pathway. Human RWD containing sumoylation enhancer (RSUME) has been previously reported to play a promoting role in pituitary tumours. However, the exact role of RSUME in RCC remains unclear. The present study aimed to investigate the expression levels of VHL, HIF-1α, and RSUME genes and proteins in human RCC tissues, and their correlations.
Material And Methods:
Immunohistochemistry and real-time PCR were applied to detect the expression levels of VHL, HIF-1α, and RSUME in normal renal tissue (control group) and RCC (experimental group).
Results:
The results revealed that RSUME and HIF-1α were significantly upregulated in RCC tissues compared with normal renal tissues (p < 0.05), while the expression level of VHL was significantly lower than that in normal renal tissues (p < 0.05). Correlation analysis results showed that the expression of VHL was negatively correlated with HIF-1α and RSUME, respectively (p < 0.05). However, a positive correlation between RSUME and HIF-1α expression was observed (p < 0.05).
Conclusions:
These results suggested that upregulated expression of RSUME may be involved in the formation and progression of renal cell carcinoma via interaction with VHL/HIF-1α signalling pathway, and thus RSUME may be a novel potential therapeutic target for renal cell carcinoma.
Insights
Human RWD containing sumoylation enhancer (RSUME) is upregulated in renal cell carcinoma (RCC). RSUME may promote RCC progression by interacting with the VHL/HIF-1α pathway, suggesting it as a potential therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Renal cell carcinoma (RCC) is characterized by von Hippel-Lindau (VHL) gene loss, leading to HIF pathway activation and tumor development.
- Human RWD containing sumoylation enhancer (RSUME) is implicated in pituitary tumors, but its role in RCC is unknown.
Purpose of the Study:
- To investigate the expression levels of VHL, HIF-1α, and RSUME in human RCC tissues.
- To analyze the correlations between VHL, HIF-1α, and RSUME in RCC.
Main Methods:
- Immunohistochemistry was used to detect protein expression levels.
- Real-time PCR was employed to quantify gene expression levels.
- Expression was analyzed in normal renal tissue and RCC tissue samples.
Main Results:
- RSUME and HIF-1α were significantly upregulated in RCC tissues compared to normal tissues (p < 0.05).
- VHL expression was significantly lower in RCC tissues than in normal tissues (p < 0.05).
- VHL expression was negatively correlated with HIF-1α and RSUME, while RSUME and HIF-1α showed a positive correlation (p < 0.05).
Conclusions:
- Upregulated RSUME expression is associated with RCC formation and progression.
- RSUME may exert its effects through the VHL/HIF-1α signaling pathway.
- RSUME represents a potential novel therapeutic target for renal cell carcinoma.
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