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DOCK1 regulates the malignant biological behavior of endometrial cancer through c-Raf/ERK pathway
Shangdan Xie1, Yanshan Jin1, Jiakun Wang2
1Zhejiang Provincial Clinical Research Center for Obstetrics and Gynecology, Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, 325027, Wenzhou, Zhejiang, China.
Background:
The effect of DOCK1 gene on the biological behavior of endometrial carcinoma cells and its related pathway has not been reported.
Methods:
The immunohistochemical method and western blot were utilized to analyze DOCK1 protein expression in endometrial tissues and cells, respectively. CCK-8, BrdU, transwell and flow cytometry were performed to analyze the effect of DOCK1 expression changes on the viability, proliferation, invasion, migration and apoptosis of endometrial cancer cells, respectively. The effects of DOCK1 gene on Bcl-2, MMP9, Ezrin, E-cadherin and c-RAF/ERK1/2 signaling pathway were evaluated by western blot. The xenograft models were constructed to analyze the effect of DOCK1 in vivo.
Results:
DOCK1 expression was increased in endometrial cancer tissues and cells compared with those in normal adjacent tissues and cells. DOCK1 knockout could inhibit the malignant biological behavior of endometrial cancer cells, while DOCK1 overexpression played the opposite effect. The expression of E-cadherin was upregulated and those of MMP9, Ezrin, Bcl-2, p-c-RAF (S338) and p-ERK1/2 (T202/Y204) were downregulated after DOCK1 knockout, while DOCK1 overexpression played the opposite effect. Additionally, Raf inhibitor LY3009120 reversed the function of DOCK1 on malignant biological behavior. In vivo experiment results showed that the growth and weight of transplanted tumors in nude mice were inhibited after DOCK1 knockout. The changes of E-cadherin, MMP9, Ezrin and Bcl-2 expressions in the transplanted tumors were consistent with those in vitro.
Conclusion:
DOCK1 could enhance the malignant biological behavior of endometrial cancer cells, which might be through c-RAF/ERK1/2 signaling pathways in vitro and in vivo.
Insights
The DOCK1 gene promotes endometrial cancer progression by enhancing cell viability, proliferation, and invasion. Its effects are mediated through the c-RAF/ERK1/2 signaling pathway, offering potential therapeutic targets for endometrial carcinoma.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- The role of the DOCK1 gene in endometrial carcinoma's biological behavior and associated pathways remains largely unexplored.
- Understanding DOCK1's function is crucial for developing targeted therapies for endometrial cancer.
Purpose of the Study:
- To investigate the effect of the DOCK1 gene on the biological behavior of endometrial carcinoma cells.
- To elucidate the underlying molecular mechanisms, including the c-RAF/ERK1/2 signaling pathway.
Main Methods:
- Immunohistochemistry and Western blot for DOCK1 protein expression analysis.
- Cell viability, proliferation, invasion, migration, and apoptosis assays (CCK-8, BrdU, Transwell, flow cytometry).
- In vivo xenograft models to assess DOCK1's effect on tumor growth.
Main Results:
- DOCK1 expression is significantly upregulated in endometrial cancer tissues and cells.
- DOCK1 knockout inhibited, while overexpression enhanced, malignant cellular behaviors (viability, proliferation, invasion).
- DOCK1 modulates the expression of key proteins (E-cadherin, MMP9, Bcl-2, Ezrin) and the c-RAF/ERK1/2 pathway, with observed effects in vivo.
Conclusions:
- DOCK1 enhances the malignant biological behavior of endometrial cancer cells.
- The c-RAF/ERK1/2 signaling pathway is implicated in DOCK1's oncogenic function.
- DOCK1 represents a potential therapeutic target for endometrial carcinoma.
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