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Prediction of non-muscle-invasive bladder cancer recurrence by measurement of checkpoint HLAG’s receptor ILT2 on peripheral CD8(+) T cells

BACKGROUND AND OBJECTIVE: Recurrence of non-muscle invasive bladder cancer (NMIBC) after initial management occurs in 60–70% of patients. Predictive criteria for recurrence remain only clinical and pathological. The aim of this study was to investigate the prognostic significance of the proportion o...

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Detalles Bibliográficos
Autores principales: Desgrandchamps, Francois, LeMaoult, Joel, Goujon, Annabelle, Riviere, Adrien, Rivero-Juarez, Antonio, Djouadou, Malika, de Gouvello, Amory, Dumont, Clement, Wu, Ching-Lien, Culine, Stephane, Verine, Jerome, Rouas-Freiss, Nathalie, Hennequin, Christophe, Masson-Lecomte, Alexandra, Carosella, Edgardo D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Impact Journals LLC 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6145700/
https://www.ncbi.nlm.nih.gov/pubmed/30237859
http://dx.doi.org/10.18632/oncotarget.26036
Descripción
Sumario:BACKGROUND AND OBJECTIVE: Recurrence of non-muscle invasive bladder cancer (NMIBC) after initial management occurs in 60–70% of patients. Predictive criteria for recurrence remain only clinical and pathological. The aim of this study was to investigate the prognostic significance of the proportion of checkpoint HLA-G’s receptor ILT2-expressing peripheral CD8(+) T cells. RESULTS: The proportion of CD4(+)ILT2(+)and CD8(+)ILT2(+) T cells was not increased in NMIBC compared to controls. However, a strong association was found between recurrence and CD8(+)ILT2(+) T cell population levels (p = 0.0006). Two-year recurrence-free survival was 83% in patients with less than 18% CD8(+)ILT2(+) T cells, 39% in the intermediary group, and 12% in patients with more than 46% CD8(+)ILT2(+) T cells. Multivariate analyses demonstrated that the proportion of CD8(+)ILT2(+) T cells was an independent predictive factor for recurrence. Adding CD8(+)ILT2(+) T cells population level to clinical variables increased the predictive accuracy of the model by 4.5%. MATERIALS AND METHODS: All patients treated for NMIBC between 2012 and 2014 were included prospectively. Blood samples, tumor and clinico-pathological characteristics were collected. HLA-G expression was measured using IHC, and CD8(+)ILT2(+) T cell levels using flow cytometry. Association between HLA-G and CD8(+)ILT2(+) T cell population levels with NMIBC risk of recurrence was investigated using Cox regression analyses. Prediction was measured using the concordance index statistic. CONCLUSIONS: We demonstrated a strong association between the proportion of circulating CD8(+)ILT2(+) T cells and NMIBC risk of recurrence. Gain in prediction was substantial. If externally validated, such immunological marker could be integrated to predict NMIBC recurrence.