1.Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China;
2.Clinical Trials Institutions for Drugs and Medical Devices, Beijing Shijitan Hospital, Capital Medical University, Beijing 100038, China;
3.Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China;
4.Center of Excellence for Omics Research, National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
Abstract:Objective To evaluate the risk of immune-associated encephalitis (AIE) caused by immune checkpoint inhibitors (ICI) based on the US Food and Drug Adverse Reaction Reporting System. Methods Adverse event reports of ICI (including Navulizumab, Parbolizumab, Attilizumab, Abvizumab, Duvarizumab, Cemiplimab, Ipimimumab, and Tremelimumab) were collected from FAERS database from 1Q2011 to 4Q2021. The risk, occurrence time, patient outcome, and ICI reintroduction of AIE adverse events were evaluated by ROR. Signal was considered to exist when the number of reported adverse events related to the target drug was ≥ 3 and the lower limit of 95% ROR signal was ≥ 1. Results A total of 865 adverse events of AIE were reported, involving 234 patients receiving ICI therapy. The signal emerged in Nivolumab, Pembrolizumab, Atezolizumab, Durvalumab, Nivolumab with Ipilimumab, and durvalumab with Tremelimumab, with Durvalumab having the strongest signal (ROR 95% CI: 40.97 [25.70-65.31]). Nivolumab plus ipilimumab had a higher risk of AIE compared to Nivolumab monotherapy (ROR 95% CI: 33.16 [25.49-43.15]), with a shorter period of onset of time(median 60 days). More than 70% of patients with ICI-associated AIE required hospitalization or prolonged hospital stay, with a fatality rate of 18.80% (44 cases). No reports of ICI resumption were collected. Conclusion The risk of AIE induced by ICI is different, and ICI-associated AIE tended to occur within three months after ICI treatment, which should attract clinical attention.
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