MicroRNA‑193b acts as a tumor suppressor gene in human esophageal squamous cell carcinoma via target regulation of KRAS

Kang,Min; Li,Yan; Zhu,Shengtao; Zhang,Shutian; Guo,Shuilong; Li,Peng

doi:10.3892/ol.2019.10039

MicroRNA‑193b acts as a tumor suppressor gene in human esophageal squamous cell carcinoma via target regulation of KRAS

Authors:
- Min Kang
- Yan Li
- Shengtao Zhu
- Shutian Zhang
- Shuilong Guo
- Peng Li
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Affiliations: Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, National Clinical Research Center for Digestive Diseases, Beijing Digestive Disease Center, Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases, Beijing 100050, P.R. China, Molecular Medicine Experimental Center, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
Published online on: February 13, 2019 https://doi.org/10.3892/ol.2019.10039
Pages: 3965-3973

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Abstract

In recent years, microRNA‑193b (miR‑193b) is regarded as a tumor suppressor in the development and progression of various cancers. Several studies have indicated that KRAS could be regulated by miR‑193b in pancreatic cancer cells. However, the function of miR‑193b in human esophageal squamous cell carcinoma has not been explored intensively thus far. Herein, the relationship between miR‑193b and KRAS was mainly explored in esophageal squamous cell carcinoma cells. In the present study, the expression levels of miR‑193b and KRAS were assessed in both human esophageal cancer cells and tissues. The direct regulatory relationship between miR‑193b and KRAS was evaluated using dual‑luciferase assay. The effect of miR‑193b overexpression and inhibitor on cell proliferation, migration/invasion, and apoptosis was further detected herein. Our results indicated that the expression of miR‑193b was significantly lower in human esophageal cancer tissues than paracancerous tissues. The expression level of miR‑193b/KRAS was stage‑dependent in human esophageal cancers. KRAS was indicated as the direct target of miR‑193b, and upregulation of miR‑193b increased the percentage of cell apoptosis, and suppressed cell proliferation as well as cell migration/invasion via direct regulation of KRAS. Therefore, our study indicated that miR‑193b plays an important role in the development and progression of human esophageal squamous cell carcinoma, which may become a novel target in the treatment of human esophageal squamous cell carcinoma in the future.

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