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ACKR3 orchestrates Hedgehog signaling to promote renal cell carcinoma progression
Chao Tang1, Lin Li2, Qiang Xu1
1National Clinical Research Center for Child Health of the Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Abstract:
Renal cell carcinoma (RCC) is the second commonest urological malignant neoplasm and mortality rate of patients with RCC appears to be increasing each year. Thus, further understanding of the molecular mechanisms responsible for the development and progression of RCC is of particular importance. Here, we report that atypical chemokine receptor 3 (ACKR3) orchestrates the Hedgehog (Hh)-GLI1 signaling to promote RCC progression. The expression of ACKR3 is elevated in RCC tissues, which is associated with malignant and clinical outcomes of RCC, and ACKR3 expression is positively correlated with GLI1 expression in RCC tissues. Mechanically, Hh promotes RCC progression through GLI1-mediated ACKR3 transcription by the directly binding of GLI1 to ACKR3 gene, while CXCL12-ACKR3 axis simultaneously enhances Hh activation via the binding of ACKR3 to Smoothened (SMO), a receptor in Hh pathway, resulting in the upregulation of SMO phosphorylation that potentiates downstream signal activity and consequently contributes to RCC progression. Thus, our findings may provide with the evidence of developing a novel treatment method with specific target for RCC.
Insights
Atypical chemokine receptor 3 (ACKR3) drives renal cell carcinoma (RCC) progression by orchestrating Hedgehog-GLI1 signaling. Targeting this pathway may offer novel therapeutic strategies for RCC patients.
Area of Science:
- Oncology
- Molecular Biology
- Urology
Background:
- Renal cell carcinoma (RCC) is a significant urological malignancy with increasing mortality.
- Understanding the molecular drivers of RCC progression is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the role of atypical chemokine receptor 3 (ACKR3) in renal cell carcinoma (RCC) progression.
- To elucidate the molecular mechanisms linking ACKR3 to the Hedgehog (Hh)-GLI1 signaling pathway in RCC.
Main Methods:
- Analysis of ACKR3 expression in RCC tissues and its correlation with clinical outcomes.
- Investigation of the interaction between ACKR3, Hh-GLI1 pathway components (GLI1, SMO), and CXCL12.
- Assessment of the impact of the ACKR3-Hh-GLI1 axis on RCC progression.
Main Results:
- ACKR3 expression is elevated in RCC tissues and correlates with poor clinical outcomes and higher GLI1 expression.
- GLI1 directly binds to the ACKR3 gene, promoting its transcription.
- The CXCL12-ACKR3 interaction enhances Hh pathway activation by upregulating SMO phosphorylation, driving RCC progression.
Conclusions:
- ACKR3 plays a critical role in promoting RCC progression through the Hh-GLI1 signaling pathway.
- The findings highlight the ACKR3-Hh-GLI1 axis as a potential therapeutic target for renal cell carcinoma.
- Targeting ACKR3 or its associated signaling may offer a novel treatment strategy for RCC.
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