Cancer-associated fibroblasts-derived exosomal ZNF250 promotes the proliferation, migration, invasion, and immune escape of hepatocellular carcinoma cells by transcriptionally activating PD-L1
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View abstract on PubMed
Summary
This summary is machine-generated.Cancer-associated fibroblast exosomes promote hepatocellular carcinoma (HCC) growth by transferring zinc finger protein 250 (ZNF250), which upregulates programmed cell death 1 ligand 1 (PD-L1). Inhibiting ZNF250 in these exosomes may offer a new HCC treatment strategy.
Area Of Science
- Oncology
- Cell Biology
- Cancer Research
Background
- Hepatocellular carcinoma (HCC) progression is influenced by the tumor microenvironment, particularly cancer-associated fibroblasts (CAFs).
- CAF-derived exosomes are implicated in modulating HCC development, but the underlying mechanisms require further elucidation.
Purpose Of The Study
- To investigate the role of zinc finger protein 250 (ZNF250) in CAF-derived exosomes and its impact on hepatocellular carcinoma (HCC) progression.
- To determine the regulatory relationship between ZNF250 and programmed cell death 1 ligand 1 (PD-L1) in HCC.
Main Methods
- Quantitative real-time PCR, western blot, chromatin immunoprecipitation, and dual-luciferase reporter assays were used to analyze gene and protein expression and regulatory interactions.
- Exosome characterization, labeling, and uptake studies were performed using transmission electron microscopy and PKH67 dye.
- Cell proliferation, migration, invasion, and apoptosis assays, along with ELISA and a xenograft mouse model, were employed to assess functional impacts.
Main Results
- ZNF250 expression was elevated in HCC tissues and cells, correlating with clinical parameters and transcriptionally activating PD-L1.
- CAF-derived exosomal ZNF250 was found to regulate PD-L1 expression in HCC cells.
- Exosomes from ZNF250-deficient CAFs suppressed HCC cell proliferation, migration, invasion, and immune escape by downregulating PD-L1, and inhibited tumor formation in vivo.
Conclusions
- CAF-derived exosomal ZNF250 promotes HCC development by upregulating PD-L1 expression.
- Targeting ZNF250 within CAF-derived exosomes presents a potential therapeutic strategy for HCC.
- Understanding the ZNF250-PD-L1 axis in CAF-derived exosomes offers insights into HCC suppression mechanisms.
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