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- W4361953420 abstract "<div>AbstractPurpose:<p>To analyze the distribution, associated immune contexture, and clinical significance of human leukocyte antigen (HLA) class-I and HLA class-II subunits in non–small cell lung cancer (NSCLC).</p>Experimental Design:<p>Using spatially resolved and quantitative multiplexed immunofluorescence we studied the tumor/stromal tissue distribution, cancer cell–specific defects, and clinicopathologic/survival associations of β2 microglobulin (β2M), HLA-A, and HLA-B,-C heavy chains, as well as HLA class-II β chain in >700 immunotherapy-naïve NSCLCs from four independent cohorts. Genomic analysis of HLA genes in NSCLC was performed using two publicly available cohorts.</p>Results:<p>Cancer cell–specific downregulation of HLA markers was identified in 30.4% of cases. β2M was downregulated in 9.8% (70/714), HLA-A in 9% (65/722), HLA-B,-C in 12.1% (87/719), and HLA class-II in 17.7% (127/717) of evaluable samples. Concurrent downregulation of β2M, HLA-B,-C, and HLA class-II was commonly identified. Deleterious mutations in HLA genes were detected in <5% of lung malignancies. Tumors with cancer cell–specific β2M downregulation displayed reduced T cells and increased natural killer (NK)–cell infiltration. Samples with cancer cell HLA-A downregulation displayed modest increase in CD8<sup>+</sup> T cells and NK-cell infiltration. Samples with cancer cell–selective HLA-B,-C or HLA class-II downregulation displayed reduced T cells and NK-cell infiltration. There was limited association of the markers with clinicopathologic variables and KRAS/EGFR mutations. Cancer cell–selective downregulation of the HLA subunits was associated with shorter overall survival.</p>Conclusions:<p>Our results reveal frequent and differential defects in HLA class-I and HLA class-II protein subunit expression in immunotherapy-naïve NSCLCs associated with distinct tumor microenvironment composition and patient survival.</p></div>" @default.
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- W4361953420 date "2023-03-31" @default.
- W4361953420 modified "2023-10-18" @default.
- W4361953420 title "Data from Spatial Analysis and Clinical Significance of HLA Class-I and Class-II Subunit Expression in Non–Small Cell Lung Cancer" @default.
- W4361953420 doi "https://doi.org/10.1158/1078-0432.c.6529854.v1" @default.
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