Dysgerminomas: germ cell tumors exhibit high expression of PD-L1 and associated with high TILs and good prognosis
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View abstract on PubMed
Summary
This summary is machine-generated.Dysgerminomas in ovarian germ cell tumors show high PD-L1 expression, correlating with increased tumor-infiltrating lymphocytes and a better prognosis, suggesting potential immunotherapy benefits for specific patient groups.
Area Of Science
- Oncology
- Immunology
- Genetics
Background
- Ovarian germ cell tumors (OVGCTs) are a significant subset of ovarian cancers, with recurrent cases exhibiting aggressive and chemoresistant characteristics.
- Current immunotherapy use in OVGCTs is limited due to insufficient understanding of their immunological landscape.
- PD-L1 expression and its role in the tumor microenvironment of OVGCTs are largely unexplored.
Purpose Of The Study
- To investigate programmed death-ligand 1 (PD-L1) expression in various subtypes of ovarian germ cell tumors.
- To explore the correlation between PD-L1 expression, tumor microenvironment components (immune cells, cancer stem cells), and genetic alterations.
- To assess the relationship between PD-L1 expression and clinical outcomes in OVGCT patients.
Main Methods
- Immunohistochemical analysis of 34 ovarian germ cell tumors (dysgerminomas, yolk sac tumors, teratomas, mixed germ cell tumors) for PD-L1 expression, immune cell infiltration, and cancer stem cell markers.
- Correlation analysis of PD-L1 expression with clinical outcomes.
- Bioinformatic analysis of testicular germ cell tumor (TGCT) datasets from The Cancer Genome Atlas (TCGA) using cBioPortal and GEPIA to correlate genetic alterations with PD-L1 expression and prognosis.
Main Results
- Dysgerminomas demonstrated significantly higher PD-L1 expression compared to yolk sac tumors.
- High PD-L1 expression in dysgerminomas was associated with increased tumor-infiltrating lymphocytes (TILs) and stem cell markers.
- Dysgerminomas/seminomas with high PD-L1 expression exhibited more genetic alterations and a favorable prognosis compared to PD-L1-negative yolk sac tumors.
Conclusions
- PD-L1 expression varies significantly among OVGCT subtypes, with dysgerminomas showing a distinct immunophenotype.
- High PD-L1 expression in dysgerminomas is linked to a more immunogenic tumor microenvironment and better patient outcomes.
- These findings highlight the potential for targeted immunotherapy in specific OVGCT subsets and identify factors contributing to treatment resistance.
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