α-PD-L1 mAb enhances the abscopal effect of hypo-fractionated radiation by attenuating PD-L1 expression and inducing CD8 + T-cell infiltration

16Citations
Citations of this article
25Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Aim: We investigated a promising cooperative combination of radiotherapy (RT) and programmed death ligand 1 (PD-L1) monoclonal antibodies (mAb) in both local and abscopal tumors. Materials & methods: C57BL/6 mice were randomly grouped and received RT, α-PD-L1 mAb or combination therapy 13 days after implantation of Lewis lung carcinoma cells. Flow cytometry and immunohistochemistry analyses demonstrated CD8 + T-cell infiltration and PD-L1 expression in tumor issue. Cytometric bead arrays were used to examine cytokine levels. Results: Our studies revealed that administration of 8 Gy × 3 F with α-PD-L1 mAb promoted both local and distant control. Only local hypofractionated RT enhanced CD8 + T-cell infiltration with increased PD-L1 expression at distant foci, which might occur via serum IFN-γ modulation. Addition of α-PD-L1 mAb reduced PD-L1 expression and further increased CD8 + T-cell infiltration. Conclusion: We identified a novel mechanism through which combination therapy enhanced the abscopal effect.

Cite

CITATION STYLE

APA

Wang, H., Lin, X., Luo, Y., Sun, S., Tian, X., Sun, Y., … Xie, C. (2019). α-PD-L1 mAb enhances the abscopal effect of hypo-fractionated radiation by attenuating PD-L1 expression and inducing CD8 + T-cell infiltration. Immunotherapy, 11(2), 101–118. https://doi.org/10.2217/imt-2018-0049

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free