The study team used several preclinical models to evaluate the effect of an IL-6 blockade on autoimmunity and response to anti-CTLA-4 therapy.
“We need to overcome immune toxicity, first and foremost, to support patients and reduce their symptom burden. Secondly, we know that there are multiple, non-overlapping mechanisms of resistance in the tumor microenvironment. In order to build an effective multi-agent immunotherapy regimen, we have to overcome the barrier of immune-related toxicity so that patients can continue receiving the optimum treatment,” says senior author Adi Diab, The University of Texas MD Anderson Cancer Center.
Novel Target to Enhance Immunotherapy
The present findings thereby establish a proof of concept for combining immune checkpoint blockade with cytokine blockers to selectively inhibit inflammatory autoimmune responses.
The findings were further validated through a retrospective analysis of 31 melanoma patients who were treated efficiently with immune checkpoint blockade.
“Cytokine blockers have been well established to block autoimmunity. The novelty of this study is bringing cytokine targeting to tumor immunity and demonstrating that autoimmunity and antitumor immunity are not necessarily overlapping immune responses but can be decoupled at the cytokine level. IL-6 is only one cytokine, but this work offers proof of principle for taking the science to the next level by targeting multiple cytokines in a multi-layered approach,” says Diab.
Source: Medindia
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