Source:Critical Reviews in Oncology/Hematology
Author(s): A. Garant, C. Guilbault, T. Ekmekjian, Z. Greenwald, P. Murgoi, T. Vuong
PurposeClinical trials studying immune checkpoint inhibitors exclude patients on corticosteroids, due to the hypothesis that corticosteroids may antagonize immunotherapy. We performed a systematic review of the literature looking at the clinical outcomes of cancer patients treated with immune checkpoint inhibitors and concomitant corticosteroids.MethodsThe following databases were searched for relevant studies: MEDLINE, Embase Classic+Embase, BIOSIS Previews, the Cochrane Database of Systematic Reviews, the CENTRAL Registry of Controlled Trials, Web of Science and Scopus. Abstracts from the meetings of the European Cancer Congress/European Society for Medical Oncology, the American Society of Clinical Oncology, the American Society of Hematology, the European Society for Radiotherapy & Oncology, the American Society for Radiation Oncology and the European Society for Radiotherapy & Oncology were manually searched. Two independent reviewers screened the references: case reports and articles with a low risk of bias were retained.ResultsFollowing a retrieval of 14603 unique references, 140 abstracts were retained for review; 27 articles are in the final analysis. Although limited, the reviewed data suggests that the concomitant administration of corticosteroids and immune checkpoint inhibitors may not necessarily lead to poorer clinical outcomes.ConclusionIn our systematic review, there was no objective data on the exact types of corticosteroids and the dose threshold above which an interaction could be measured clinically. Consideration of stratified randomization and treatment sequence evaluations in prospective trials may clarify this challenging topic and perhaps improve patient access to immune checkpoint therapies.
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