IL5 and panic disorder: Similarly, other meta-analyses of cytokine levels among people with panic disorder noted increased levels of some inflammatory markers, such as IL-6, IL-1β and IL-5, among people with panic disorder compared to control participants, but conflicting results were found for other biomarkers including IL-2, IL-12, and interferon(INF)-γ (Quagliato and Nardi, 2018).