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Title: Identification of a panel of ten cell surface protein antigens associated with immunotargeting of leukemias and lymphomas by peripheral blood γδ T cells
Author: Gomes, Anita Q.
Correia, Daniel V.
Grosso, Ana R.
Lança, Telma
Ferreira, Cristina
Lacerda, João F.
Barata, João T.
Gomes da Silva, Maria
Silva-Santos, Bruno
Keywords: Biomarkers
Vγ9Vδ2 T-lymphocytes
Hematopoietic tumors
Lymphoma cell lines
Issue Date: Feb-2010
Publisher: Ferrata Storti Foundation
Citation: Haematologica | 2010; 95(8)
Abstract: Background Vγ9Vδ2 T lymphocytes are regarded as promising mediators of cancer immunotherapy due to their capacity to eliminate multiple experimental tumors, particularly within those of hematopoietic origin. However, Vγ9Vδ2 T-cell based lymphoma clinical trials have suffered from the lack of biomarkers that can be used as prognostic of therapeutic success. Design and Methods We have conducted a comprehensive study of gene expression in acute lymphoblastic leukemias and non-Hodgkin’s lymphomas, aimed at identifying markers of susceptibility versus resistance to Vγ9Vδ2 T cell-mediated cytotoxicity. We employed cDNA microarrays and quantitative real-time PCR to screen 20 leukemia and lymphoma cell lines, and 23 primary hematopoietic tumor samples. These data were analyzed using state-of-the-art bioinformatics, and gene expression patterns were correlated with susceptibility to Vγ9Vδ2 T cell mediated cytolysis in vitro. Results We identified a panel of 10 genes encoding cell surface proteins that were statistically differentially expressed between “γδ-susceptible” and “γδ-resistant” hematopoietic tumors. Within this panel, 3 genes (ULBP1, TFR2 and IFITM1) were associated with increased susceptibility to Vγ9Vδ2 T-cell cytotoxicity, whereas the other 7 (CLEC2D, NRP2, SELL, PKD2, KCNK12, ITGA6 and SLAMF1) were enriched in resistant tumors. Furthermore, some of these candidates displayed a striking variance of expression among primary follicular lymphomas and T-cell acute lymphoblastic leukemias. Conclusions Our results suggest that hematopoietic tumors display a highly variable repertoire of surface proteins that can impact on Vγ9Vδ2 cell-mediated immunotargeting. The prognostic value of the proposed markers can now be evaluated in upcoming Vγ9Vδ2 T cell-based lymphoma/leukemia clinical trials.
Description: ©2010 Ferrata Storti Foundation. This is an open-access paper
Peer review: yes
ISSN: 0390-6078
Appears in Collections:IMM - Artigos em Revistas Internacionais

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