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Updated: May 30, 2025

Modeling Spontaneous Metastatic Renal Cell Carcinoma mRCC in Mice Following Nephrectomy
Published on: April 29, 2014
EGR1 inhibits clear cell renal cell carcinoma proliferation and metastasis via the MAPK15 pathway
Naixiong Peng1, Yuefeng Cai1, Dong Chen1
1Department of Urology, Shenzhen Longhua District Central Hospital, Shenzhen, 518110, China.
Background:
Clear cell renal carcinoma (ccRCC), the leading histological subtype of RCC, lacks any targeted therapy options. Although some studies have shown that early growth response factor 1 (EGR1) has a significant role in cancer development and progression, its role and underlying mechanisms in ccRCC remain poorly understood.
Methods:
The Cancer Genome Atlas (TCGA) database was utilized to examine the expression of EGR1 in ccRCC. The expression of EGR1 in 55 ccRCC tissues was evaluated using immunohistochemistry. The link between EGR1 expression and clinicopathological variables was examined through an analysis. Gain-of-function assays were employed to investigate EGR1's biological functions in ccRCC cells, involving proliferation, colony formation, invasion assays, and tumorigenesis in nude mice. In order to assess the protein expression of mitogen-activated protein kinase 15 (MAPK15), E-cadherin, matrix metalloproteinase-9/-2 (MMP-9 and MMP-2), Western blot technique was applied.
Results:
The results revealed a decrease in EGR1 expression in ccRCC tissues. This decrease was strongly linked to TNM stage, lymphatic metastasis, tumor size, histological grade, and unfavorable prognosis in ccRCC patients. It has been demonstrated that overexpressing EGR1 inhibits the growth of xenograft tumors in vivo and inhibits cell colony formation, motility, and invasion in vitro. Furthermore, EGR1 can prevent the development and movement of ccRCC cells by controlling the expression of MMP-2, MMP-9, E-cadherin, and MAPK15.
Conclusions:
The EGR1/MAPK15 axis may represent a promising target for drug development, with EGR1 serving as a possible target for ccRCC therapy.
Insights
Early growth response factor 1 (EGR1) is decreased in clear cell renal cell carcinoma (ccRCC). Overexpressing EGR1 inhibits ccRCC progression and may offer a new therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Clear cell renal cell carcinoma (ccRCC) lacks targeted therapies.
- The role of early growth response factor 1 (EGR1) in ccRCC is not well understood.
Purpose of the Study:
- To investigate the role of EGR1 in ccRCC development and progression.
- To explore EGR1 as a potential therapeutic target for ccRCC.
Main Methods:
- Utilized The Cancer Genome Atlas (TCGA) database for EGR1 expression analysis.
- Performed immunohistochemistry on 55 ccRCC tissues.
- Conducted gain-of-function assays and Western blot analysis to assess EGR1's biological functions and downstream targets.
Main Results:
- EGR1 expression was decreased in ccRCC tissues and correlated with advanced TNM stage, metastasis, and poor prognosis.
- Overexpression of EGR1 inhibited tumor growth, colony formation, motility, and invasion in vitro and in vivo.
- EGR1 regulates the expression of MMP-2, MMP-9, E-cadherin, and MAPK15, impacting ccRCC cell behavior.
Conclusions:
- EGR1 plays a tumor-suppressive role in ccRCC.
- The EGR1/MAPK15 axis presents a potential therapeutic strategy for ccRCC treatment.
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06:38A Syngeneic Mouse Model of Metastatic Renal Cell Carcinoma for Quantitative and Longitudinal Assessment of Preclinical Therapies
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