TMIC-28. TITLE: AN IMMUNE-RELATED, SEX-SPECIFIC T-CELL SIGNATURE IN GLIOBLASTOMA MICROENVIRONMENT WITH PROGNOSTIC IMPACT

Abstract BACKGROUND Glioblastoma, IDH-wildtype (GBM), is the most prevalent and aggressive primary brain cancer with a poor prognosis. Immune checkpoint inhibitors (ICIs) have been explored in GBM with limited success, highlighting the need for a better understanding of the tumor microenvironment (T...

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Veröffentlicht in:Neuro-oncology (Charlottesville, Va.) Va.), 2024-11, Vol.26 (Supplement_8), p.viii303-viii304
Hauptverfasser: Romagnoli, Giulia, Offi, Martina, Capone, Imerio, Tavilla, Andrea, Canini, Irene, Lapenta, Caterina, Buccarelli, Mariachiara, Giordano, Martina, Tirelli, Valentina, Sanchez, Massimo, Fragale, Alessandra, Giannetti, Stefano, Ceccarelli, Giovanni Maria, Bonaventura, Rina Di, Doglietto, Francesco, Olivi, Alessandro, Lauretti, Liverana, Biffoni, Mauro, Ricci-Vitiani, Lucia, Pallini, Roberto, Gabriele, Lucia, D’Alessandris, Quintino Giorgio
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Sprache:eng
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Zusammenfassung:Abstract BACKGROUND Glioblastoma, IDH-wildtype (GBM), is the most prevalent and aggressive primary brain cancer with a poor prognosis. Immune checkpoint inhibitors (ICIs) have been explored in GBM with limited success, highlighting the need for a better understanding of the tumor microenvironment (TME). This study investigated whether the expression of specific immune checkpoints on tissue-resident memory T cells (Trm) predicts patient outcomes. METHODS In a single cohort observational study, tumor samples from 45 histologically confirmed GBM patients were processed to obtain single-cell suspensions. Multiparametric flow cytometry was used to analyze the correlation of Trm phenotypes with overall survival (OS) and progression-free survival (PFS). Univariate and multivariate analyses were conducted to assess the prognostic significance of Trm subsets. RESULTS Low frequency of exausted Trm expressing programmed cell death protein 1 (PD1) and T cell immunoglobulin and mucin domain-containing protein 3 (TIM3) was associated with better clinical outcomes. Multivariate analysis identified low CD8+CD103+PD1+TIM3+ Trm and Karnofsky performance status (KPS) ≥70 as the most significant independent prognostic factors for longer OS (hazard ratios—HR [95%CI]: 0.14 [0.04–0.52] p < 0.001, 0.39 [0.16–0.96] p = 0.04, respectively). Additionally, younger patients (
ISSN:1522-8517
1523-5866
DOI:10.1093/neuonc/noae165.1206