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NSDHL promotes the degradation of sting in cholangiocarcinoma
Weihua Yu1, Jionghuang Chen1, Yifan Tong2
1Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310000, China.
Abstract:
Metabolic enzymes play significant roles in tumor growth via nonmetabolic biological processes. However, more research is needed to understand their roles in immune modulation. This study revealed that 3-hydroxysteroid dehydrogenase (NSDHL) expression was elevated in cholangiocarcinoma. In vitro experiments demonstrated that NSDHL had no effect on the growth or invasion of cholangiocarcinoma cells in an artificial laboratory environment. However, NSDHL overexpression strongly enhanced the promotion of AKT/YAP-driven cholangiocarcinoma. NSDHL bound to STING and facilitated its degradation via ubiquitination. This inhibited the cyclic-GMP-AMP-synthase-STING signaling pathway and reduced the synthesis of IFNβ. A study revealed an inverse relationship between the expression of NSDHL and the infiltration of NK cells, activated CD4+ T cells, and neutrophils in individuals who were diagnosed with cholangiocarcinoma. This study elucidates the role of NSDHL, in addition to its established metabolic functions, NSDHL regulates the cyclic-GMP-AMP-synthase signaling pathway. By exploring this interplay, this research enriches our understanding of the functions of NSDHL in terms of cellular dynamics, offering novel insights into the modulation of crucial biological pathways.
Insights
3-hydroxysteroid dehydrogenase (NSDHL) promotes cholangiocarcinoma by degrading STING, inhibiting immune signaling. This metabolic enzyme
Area of Science:
- Oncology
- Immunology
- Biochemistry
Background:
- Metabolic enzymes influence tumor growth through nonmetabolic pathways.
- The role of metabolic enzymes in immune modulation requires further investigation.
- 3-hydroxysteroid dehydrogenase (NSDHL) expression is elevated in cholangiocarcinoma.
Purpose of the Study:
- To investigate the nonmetabolic roles of NSDHL in cholangiocarcinoma.
- To elucidate the mechanism by which NSDHL affects cholangiocarcinoma progression.
- To explore the impact of NSDHL on the tumor immune microenvironment.
Main Methods:
- In vitro cell culture experiments.
- Western blotting and ubiquitination assays to study protein interactions.
- Analysis of patient data to correlate NSDHL expression with immune cell infiltration.
Main Results:
- NSDHL overexpression enhanced AKT/YAP-driven cholangiocarcinoma promotion in vitro.
- NSDHL directly bound to STING, promoting its ubiquitination and degradation.
- NSDHL overexpression led to inhibition of the cGAS-STING pathway and reduced IFNβ synthesis.
- Inverse correlation observed between NSDHL expression and infiltration of NK cells, CD4+ T cells, and neutrophils in cholangiocarcinoma patients.
Conclusions:
- NSDHL plays a critical role in cholangiocarcinoma progression beyond its metabolic functions.
- NSDHL modulates the cGAS-STING signaling pathway by targeting STING for degradation.
- NSDHL contributes to immune evasion in cholangiocarcinoma by reducing type I interferon production and immune cell infiltration.
