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Published on: February 2, 2021
DNER drives glycolytic reprogramming in renal cell carcinoma by activating the JAK2/STAT3 signaling pathway
Anrui Li1, Jing-Wen Xu1, Jian-Hua Qin2
1Department of Urology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China.
Introduction:
Clear cell renal cell carcinoma (ccRCC) remains a clinically challenging malignancy due to late diagnosis and limited therapeutic options. This study aimed to investigate the role of DNER in the progression of ccRCC.
Methods:
Bioinformatic analyses were integrated with experimental validation. Metabolism-related candidate genes were systematically screened to identify hub genes closely associated with metabolic pathway activity and immune cell infiltration. Both in vitro and in vivo functional assays were performed, along with mechanistic studies focusing on DNER-interacting proteins and downstream signaling pathways.
Results:
Bioinformatic analysis revealed that lipid metabolism and energy metabolism are key metabolic pathways significantly affecting the prognosis of ccRCC patients. Through systematic screening, DNER was identified as a hub gene strongly correlated with both metabolic pathway activity and immune cell infiltration. Functional experiments demonstrated that DNER promotes ccRCC cell proliferation both in vitro and in vivo. Mechanistically, DNER physically interacts with JAK2 and activates the JAK2/STAT3 signaling pathway, leading to STAT3 nuclear translocation and subsequent direct transcriptional upregulation of the glycolytic enzymes LDHA and PKM, thereby enhancing glycolytic flux. The increased lactate production drives macrophage polarization toward a pro-tumorigenic M2-like phenotype, establishing a signaling cascade that links tumor cell-intrinsic metabolic reprogramming to immunosuppressive microenvironment remodeling. Preliminary evidence also suggests that DNER overexpression may be associated with enhanced sensitivity of ccRCC cells to the PARP inhibitor Olaparib, although the underlying mechanism requires further investigation.
Discussion:
In conclusion, DNER drives ccRCC progression by coupling glycolytic reprogramming with immunosuppressive microenvironment formation via the JAK2/STAT3 signaling axis, and may represent a potential therapeutic target for ccRCC.
Insights
The study identifies DNER as a key driver in clear cell renal cell carcinoma (ccRCC) progression. DNER promotes tumor growth by altering cell metabolism and creating an immunosuppressive tumor microenvironment, suggesting it as a potential therapeutic target for ccRCC.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Clear cell renal cell carcinoma (ccRCC) presents diagnostic and therapeutic challenges.
- Understanding the molecular mechanisms driving ccRCC progression is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the role of DNER (Developmental Netrin Response) in ccRCC progression.
- To elucidate the molecular pathways through which DNER influences ccRCC tumor growth and the tumor microenvironment.
Main Methods:
- Integrated bioinformatic analyses with experimental validation (in vitro and in vivo).
- Systematic screening of metabolism-related genes to identify hub genes.
- Functional assays and mechanistic studies on DNER-interacting proteins and signaling pathways.
Main Results:
- DNER was identified as a hub gene associated with metabolic pathway activity and immune cell infiltration in ccRCC.
- DNER promotes ccRCC cell proliferation both in vitro and in vivo.
- DNER activates the JAK2/STAT3 pathway, upregulating glycolytic enzymes and promoting M2 macrophage polarization, creating an immunosuppressive microenvironment.
Conclusions:
- DNER drives ccRCC progression by linking metabolic reprogramming to an immunosuppressive microenvironment via the JAK2/STAT3 signaling axis.
- DNER represents a potential therapeutic target for ccRCC.
- DNER overexpression may influence sensitivity to PARP inhibitors like Olaparib.
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