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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
miR-26 suppresses renal cell cancer via down-regulating coronin-3
Xin Jun Wang1,2, Zhi Jian Yan1,2, Guang Cheng Luo3,4
1Department of Urology, Zhongshan Hospital Xiamen University, Xiamen, 361000, Fujian, China.
Abstract:
Coronin-3 (coronin-1C), a homotrimer F-actin-binding protein, has been reported to be important for metastasis in several types of cancers such as lung cancer, gastric cancer, and breast cancer. Here, we present an investigation of the expression and function of coronin-3 in renal cell cancer for the first time. We also confirmed that miR-26 directly targets coronin-3 and down-regulates its expression by western blot assay and dual-luciferase reporter system. The results of MTT and colony formation assay showed that miR-26 suppressed cell proliferation. Wound healing and transwell assay revealed that miR-26 inhibited migration and invasion of renal cancer cell. Moreover, overexpression of coronin-3 could reverse the miR-26-induced inhibition in cell growth and metastasis. Thus, our study suggests that coronin-3 should serve as a potential therapeutic target in renal cell cancer and provide a candidate for miRNA therapy.
Insights
Coronin-3 protein promotes renal cell cancer progression and metastasis. MicroRNA-26 (miR-26) targets coronin-3, inhibiting cancer cell growth and invasion, suggesting potential therapeutic strategies.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Coronin-3 (coronin-1C) is an F-actin-binding protein implicated in metastasis in various cancers.
- Its role in renal cell cancer (RCC) has not been previously investigated.
Purpose of the Study:
- To investigate the expression and function of coronin-3 in renal cell cancer.
- To elucidate the regulatory relationship between miR-26 and coronin-3 in RCC.
Main Methods:
- Western blot assay and dual-luciferase reporter system to confirm miR-26 targeting of coronin-3.
- MTT and colony formation assays for cell proliferation.
- Wound healing and Transwell assays for cell migration and invasion.
Main Results:
- miR-26 directly targets and down-regulates coronin-3 expression in renal cancer cells.
- miR-26 significantly suppresses renal cancer cell proliferation, migration, and invasion.
- Overexpression of coronin-3 reverses the inhibitory effects of miR-26 on cell growth and metastasis.
Conclusions:
- Coronin-3 plays a crucial role in promoting renal cell cancer progression and metastasis.
- miR-26 acts as a tumor suppressor by targeting coronin-3.
- Coronin-3 represents a potential therapeutic target for renal cell cancer, and miR-26 offers a candidate for miRNA-based therapy.
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