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Gene Regulation and Targeted Therapy in Gastric Cancer Peritoneal Metastasis: Radiological Findings from Dual Energy CT and PET/CT
Published on: January 22, 2018
miR-27b inhibits gastric cancer metastasis by targeting NR2F2
Qingzhao Feng1, Xionglin Wu2, Fuchao Li3
1Department of General Surgery, The Affiliated Drum Tower Hospital of Medical School of Nanjing University, Nanjing, 210008, China. izaobao@vip.qq.com.
Abstract:
Increasing attention is focused on the down-regulation of miRNAs in cancer process. Nuclear receptor subfamily 2 (NR2F2, also known as COUP-TFII) is involved in the development of many types of cancers, but its role in gastric cancer remains elusive. In this experiment, oncomine and Kaplan-meier database revealed that NR2F2 was up-regulated in gastric cancer and that the high NR2F2 expression contributed to poor survival. MicroRNA-27b was targeted and down-regulated by NR2F2 in human gastric cancer tissues and cells. The ectopic expression of miR-27b inhibited gastric cancer cell proliferation and tumor growth in vitro and in vivo. Assays suggested that the overexpression of miR-27b could promote MGC-803 cells' migration and invasion and retard their metastasis to the liver. In addition, down-regulation of miR-27b enhanced GES-1 cells' proliferation and metastasis in vitro. These findings reveal that miR-27b is a tumor suppressor in gastric cancer and a biomarker for improving patients' survival.
Insights
Nuclear receptor subfamily 2 (NR2F2) is upregulated in gastric cancer, promoting tumor growth. MicroRNA-27b acts as a tumor suppressor, and its down-regulation by NR2F2 indicates poor patient survival.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are increasingly recognized for their role in cancer development, often through down-regulation.
- Nuclear receptor subfamily 2 (NR2F2), also known as COUP-TFII, is implicated in various cancers, but its specific function in gastric cancer is not well understood.
Purpose of the Study:
- To investigate the role of NR2F2 and its potential interaction with microRNAs in gastric cancer.
- To determine the prognostic significance of NR2F2 expression in gastric cancer patients.
Main Methods:
- Utilized Oncomine and Kaplan-Meier databases to analyze NR2F2 expression and survival data.
- Investigated the regulatory relationship between NR2F2 and microRNA-27b in gastric cancer cells and tissues.
- Assessed the functional impact of miR-27b on gastric cancer cell proliferation, migration, invasion, and metastasis in vitro and in vivo.
Main Results:
- NR2F2 was found to be significantly upregulated in gastric cancer, with high expression correlating with poorer patient survival.
- NR2F2 was identified as a direct regulator that down-regulates microRNA-27b (miR-27b) in gastric cancer.
- Overexpression of miR-27b suppressed gastric cancer cell proliferation and tumor growth, while also inhibiting migration and invasion.
- Down-regulation of miR-27b promoted proliferation and metastasis of gastric cancer cells.
Conclusions:
- miR-27b functions as a tumor suppressor in gastric cancer.
- NR2F2-mediated down-regulation of miR-27b contributes to gastric cancer progression.
- miR-27b holds potential as a biomarker for predicting survival in gastric cancer patients.
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