Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Dual Blockage of Both Pd-L1 and Cd47 Enhances the Therapeutic Effect of Oxaliplatin and Folfox in Ct-26 Mice Tumor Model Publisher Pubmed



Alimohammadi R1 ; Mahmoodi Chalbatani G2 ; Alimohammadi M3 ; Ghaffarinazari H4 ; Rahimi A5 ; Mortaz E1 ; Mossafa N1 ; Boon L6 ; Jalali SA1
Authors
Show Affiliations
Authors Affiliations
  1. 1. Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 198571-7443, Iran
  2. 2. Tumor Immunotherapy and Microenvironment (TIME) Group, Department of Oncology, Luxembourg Institute of Health (LIH), Luxembourg City, Luxembourg
  3. 3. Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Immunology, Faculty of Medical Sciences, Mashhad University of Medical Science, Mashhad, Iran
  5. 5. Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
  6. 6. JJP Biologics, Warsaw, Poland

Source: Scientific Reports Published:2023


Abstract

Colorectal cancer is a poorly immunogenic. Such property can be reverted by using ICD. However, ICD inducers can also induce the expression of inhibitory checkpoint receptors CD47 and PD-L1 on tumor cells, making CRC tumors resistant to mainly CD8 T cell killing and macrophage-mediated phagocytosis. In this study, we examined the therapeutic effect of Oxaliplatin and FOLFOX regimen in combination with blocking antibodies against CD47 and PD-L1. FOLFOX and Oxaliplatin treatment lead to an increase in CD47 and PD-L1 expression on CT-26 cells invitro and invivo. Combining blocking antibodies against CD47 and PD-L1 with FOLFOX leads to a significant increase in survival and a decrease in tumor size. This triple combining regimen also leads to a significant decrease in Treg and MDSC and a significant increase in CD8 + INF-γ + lymphocytes and M1/M2 macrophage ratio in the tumor microenvironment. Our study showed triple combining therapy with FOLFOX, CD47 and PD-L1 is an effective treatment regimen in CT-26 mice tumor model and may consider as a potential to translate to the clinic. © 2023, The Author(s).