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Molecular profiles of different PD-L1 expression in patients with esophageal squamous cell carcinoma.
- Source :
- Cancer Biology & Therapy; 2023, Vol. 24 Issue 1, p1-11, 11p
- Publication Year :
- 2023
-
Abstract
- Background: PD-1/PD-L1 inhibitors are approved treatments for patients with esophageal squamous cell carcinoma (ESCC). The present investigation aspired to explore the interrelation between molecular phenotype and PD-L1 expression in ESCC. Methods: PD-L1 testing and targeted next-generation sequencing (NGS) were performed on tumoral tissues from 139 ESCC patients. Tumor-infiltrating lymphocytes (TILs) were scrutinized using a tyramide signal amplification system combined with immunohistochemistry. Results: Among enrolled patients, 36.7% displayed high PD-L1 expression (combined positive score [CPS] ≥10). BRCA1 and NF1 gene mutations were significantly associated with high PD-L1 expression (p < .05) while TGFβ pathway alterations were linked to low PD-L1 expression (p = .02). High copy number instability (CNI) and copy number alterations (CNA) were correlated with low PD-L1 expression. Patients with CDKN2A deletion exhibited higher PD-L1 expression. Varying types of TILs were observed across different PD-L1 expression groups. The ratio of CD8<superscript>+</superscript>PD-L1<superscript>+</superscript> T cells and CD8<superscript>+</superscript>PD-1<superscript>+</superscript> T cells to CD8<superscript>+</superscript> T cells remained comparable in both tumoral and stromal regions, but the ratio of CD68<superscript>+</superscript>PD-L1<superscript>+</superscript> macrophages to CD68<superscript>+</superscript> macrophages was higher than the ratio of CD68<superscript>+</superscript>PD-1<superscript>+</superscript> macrophages to CD68<superscript>+</superscript> macrophages. CPS was significantly correlated with PD-L1<superscript>+</superscript> lymphocytes and CD68<superscript>+</superscript> macrophages in the tumoral region. CD8+ T cell infiltration was positively correlated with PD-1<superscript>+</superscript> cells in both tumoral and stromal regions. Conclusion: In this study, we presented the prevalence rates of PD-L1 expression in Chinese ESCC patients. The association of genetic profiles with PD-L1 expression levels also provide the clue that genomic phenotype may interact with the immunologic phenotype in ESCC. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15384047
- Volume :
- 24
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Cancer Biology & Therapy
- Publication Type :
- Academic Journal
- Accession number :
- 174739887
- Full Text :
- https://doi.org/10.1080/15384047.2023.2256927