2021
DOI: 10.1080/2162402x.2021.1956142
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Combination checkpoint therapy with anti-PD-1 and anti-BTLA results in a synergistic therapeutic effect against murine glioblastoma

Abstract: Clinical trials involving anti-programmed cell death protein-1 (anti-PD-1) failed to demonstrate improved overall survival in glioblastoma (GBM) patients. This may be due to the expression of alternative checkpoints such as B- and T- lymphocyte attenuator (BTLA) on several immune cell types including regulatory T cells. Murine GBM models indicate that there is significant upregulation of BTLA in the tumor microenvironment (TME) with associated T cell exhaustion. We investigate the use of antibodies against BTL… Show more

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Cited by 30 publications
(24 citation statements)
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References 37 publications
(49 reference statements)
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“…Thus, combination of PD-1 blockade and BTLA blockade is promising and attractive, with some potent signaling pathways by which BTLA and PD-1 inhibit activity of T cell remain to be further elucidated [ 249 , 250 ]. Preclinic model proved that anti-BTLA and anti-PD-1 immunotherapy mainly promotes the activation of CD4 + T cells, CD8 + T cells and the secretion of IFN-γ that correlates with favorable survival [ 251 ]. However, there is still a long way to go before this combination therapy could be applied clinically.…”
Section: Glioblastomamentioning
confidence: 99%
“…Thus, combination of PD-1 blockade and BTLA blockade is promising and attractive, with some potent signaling pathways by which BTLA and PD-1 inhibit activity of T cell remain to be further elucidated [ 249 , 250 ]. Preclinic model proved that anti-BTLA and anti-PD-1 immunotherapy mainly promotes the activation of CD4 + T cells, CD8 + T cells and the secretion of IFN-γ that correlates with favorable survival [ 251 ]. However, there is still a long way to go before this combination therapy could be applied clinically.…”
Section: Glioblastomamentioning
confidence: 99%
“…In this study, we also investigated whether the pre-existing levels of T cell infiltration could affect the immunotherapeutic efficacy of HSPPC-96 vaccination, since they are widely recognized as indicators predicting patients’ response to immunotherapies, such as immune checkpoint blockade ( 11 , 66 , 67 ). However, we did not observe any correlation of T cell infiltration levels, in terms of CD8 + , CD4 + and PD-1 + cell densities, with clinical outcomes ( Figures 2A–C ).…”
Section: Discussionmentioning
confidence: 99%
“…In the blockade of BTLA, an increase in the proliferation and expansion of NY-ESO-1-specific CD8+ T-cells was observed, and an increased efficiency of the use of antibodies targeting BTLA in combination with anti-PD-1 and anti-Tim-3 in melanoma was shown [ 214 ]. In in vivo models of glioblastoma, an increase in median overall survival was observed with the combination of anti-BTLA and anti-PD-1 therapies [ 215 ]. The synergistic effect of this antibody combination in enhancing T-cell proliferation and cytokine production has been described in urothelial carcinoma [ 216 ].…”
Section: Immune Checkpoint Receptorsmentioning
confidence: 99%