Platelets and MMP‑9 contribute to esophageal cancer invasion via CD40‑CD154 interactions
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View abstract on PubMed
Summary
This summary is machine-generated.CD40 on esophageal cancer cells promotes invasion by increasing MMP-9. This complicates CD40-targeted immunotherapies, which may inadvertently boost tumor spread.
Area Of Science
- Oncology
- Molecular Biology
- Immunology
Background
- CD40 expression in esophageal cancer (EC) correlates with poor prognosis.
- The precise molecular mechanisms of CD40 in EC progression and metastasis are not fully understood.
Purpose Of The Study
- To investigate the role of CD40 in esophageal cancer progression and metastasis.
- To elucidate the interaction between CD40 and CD154 and its effect on MMP-9 expression.
Main Methods
- Quantitative PCR, western blotting, flow cytometry, and immunocytochemistry were used to confirm CD40 expression in EC cell lines.
- Functional assays assessed cell migration and invasion.
- Co-culture experiments with platelets and serum analysis of patients were performed.
Main Results
- CD154 stimulation enhanced migration and invasion of CD40-overexpressing EC cells.
- Platelet-derived CD154 upregulated MMP-9 secretion in EC cells, increasing invasiveness.
- Low MMP-9 levels correlated with longer survival in Stage I EC, while high MMP-9 correlated with longer survival in Stages II-IV.
Conclusions
- CD40 activation promotes tumor cell invasiveness via MMP-9 upregulation.
- The dual role of CD40 (antitumor immunity vs. tumor promotion) presents challenges for CD40-targeted immunotherapies in EC.
- Interventions targeting CD40 may inadvertently promote malignancy within the tumor microenvironment.
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