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Updated: Feb 15, 2026

Establishment of Gastric Cancer Patient-derived Xenograft Models and Primary Cell Lines
Published on: July 19, 2019
REC8 inhibits EMT by downregulating EGR1 in gastric cancer cells
Junhong Zhao1, Lanlan Geng1, Gaoyang Duan1
1Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510120, P.R. China.
Abstract:
REC8 is a component of the meiotic cohesion complex that plays a critical role in chromosome dynamics during meiosis. However, the functional role of REC8 in gastric cancer has not been elucidated. In the present study, REC8 suppressed the growth and metastasis of gastric cancer cells in vitro. Whole Human Genome Oligo Microarray results revealed that a wide range of genes with broad function were targeted by REC8. Among them early growth response-1 (EGR1), a transcription factor and an epithelial-mesenchymal transition (EMT)-associated protein in the AGR-RAGE pathway was significantly downregulated when REC8 was overexpressed in gastric cancer cells. We hypothesized that REC8 inhibits EMT by downregulating EGR1 in gastric cancer cells. Consistent with our prediction, REC8 overexpression decreased EMT in gastric cancer cells, whereas the REC8 ablation reversed these effects. In addition, the phenotypes of EGR1 overexpressed cells were similar to the phenotypes of REC8 ablated cells. Furthermore, we determined that REC8 interacted with EGR1, and inhibited EMT in gastric cancer cells. We thus propose further studies of the pathways associated with REC8 and EGR1 to potentially find novel targets in the treatment for gastric cancer.
Insights
REC8 protein suppresses gastric cancer growth and metastasis by inhibiting epithelial-mesenchymal transition (EMT). It achieves this by downregulating early growth response-1 (EGR1), a key factor in EMT progression.
Area of Science:
- Molecular Biology
- Oncology
- Cell Biology
Background:
- REC8 is crucial for meiotic chromosome dynamics.
- The role of REC8 in gastric cancer remains unclear.
- Gastric cancer is a significant global health concern.
Purpose of the Study:
- To investigate the functional role of REC8 in gastric cancer.
- To determine if REC8 affects gastric cancer cell growth and metastasis.
- To elucidate the molecular mechanisms by which REC8 influences gastric cancer.
Main Methods:
- In vitro studies using gastric cancer cell lines.
- Whole Human Genome Oligo Microarray analysis.
- Overexpression and ablation of REC8 and EGR1.
- Assessment of epithelial-mesenchymal transition (EMT) markers.
Main Results:
- REC8 suppressed gastric cancer cell growth and metastasis in vitro.
- REC8 overexpression downregulated early growth response-1 (EGR1).
- REC8 inhibited EMT, while REC8 ablation reversed this effect; EGR1 overexpression mimicked REC8 ablation phenotypes.
- REC8 directly interacted with EGR1 to inhibit EMT.
Conclusions:
- REC8 inhibits gastric cancer progression by downregulating EGR1 and suppressing EMT.
- REC8 and EGR1 represent potential therapeutic targets for gastric cancer treatment.
- Further research into the REC8-EGR1 pathway is warranted for novel therapeutic strategies.
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