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Updated: Feb 9, 2026
Modeling Spontaneous Metastatic Renal Cell Carcinoma mRCC in Mice Following Nephrectomy
Published on: April 29, 2014
miR-199b-5p serves as a tumor suppressor in renal cell carcinoma
Yulin Lai1,2, Jing Quan1,3, Canbin Lin
1Department of Urology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China.
Abstract:
MicroRNA (miR)-199b-5p has been reported to have a critical role in various types of malignancy. However, the exact function miR-199b-5p in renal cancer remains to be fully elucidated. The present study aimed to detect the expression levels of miR-199b-5p in renal cell carcinoma (RCC) tissues and RCC cell lines, and investigated the effect of miR-199b-5p in vitro with Cell Counting Kit-8, MTT, scratch wound, Transwell and flow cytometric assays. The results demonstrated that the expression levels of miR-199b-5p were significantly downregulated in RCC tissues and cell lines compared with those in paired adjacent normal renal tissues and a reference cell line, respectively. Downregulation of miR-199b-5p by transfection with a synthetic inhibitor promoted cellular proliferation and migration, while reducing the apoptotic rate, indicating that miR-199b-5p may serve as a tumor suppressor in RCC. Further study is required to identify target genes of miR-199b-5p to elucidate the mechanisms underlying the role of miR-199b-5p in the occurrence and development of RCC.
Insights
MicroRNA 199b-5p (miR-199b-5p) is downregulated in renal cell carcinoma (RCC). Lower miR-199b-5p levels promote cancer cell proliferation and migration, suggesting its tumor-suppressive role in kidney cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNA (miR)-199b-5p is implicated in various cancers.
- Its specific role in renal cell carcinoma (RCC) requires further investigation.
Purpose of the Study:
- To determine miR-199b-5p expression levels in RCC tissues and cell lines.
- To investigate the functional impact of miR-199b-5p on RCC cell behavior *in vitro*.
Main Methods:
- Quantitative analysis of miR-199b-5p expression in RCC and normal tissues/cells.
- Functional assays including Cell Counting Kit-8, MTT, scratch wound, Transwell, and flow cytometry to assess proliferation, migration, and apoptosis.
- Inhibition of miR-199b-5p using synthetic inhibitors.
Main Results:
- miR-199b-5p expression was significantly downregulated in RCC tissues and cell lines compared to normal controls.
- Inhibition of miR-199b-5p led to increased cellular proliferation and migration.
- Reduced miR-199b-5p levels were associated with decreased apoptotic rates in RCC cells.
Conclusions:
- miR-199b-5p acts as a tumor suppressor in renal cell carcinoma.
- Its downregulation contributes to RCC progression.
- Further research into miR-199b-5p target genes is needed to understand its mechanism in RCC development.
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