Peripheral Neuroimmune Mechanisms of Hyperthermia

The study is a maximum of 42-day randomized controlled trial (RCT) of Whole Body Hyperthermia (WBH) vs. Sham for subjects with depressive symptoms at the Depression Clinical Research Program (DCRP) at Massachusetts General Hospital (MGH). 60 subjects with Major Depressive Disorder (MDD), males and females, between the ages of 18 and 65 years will be recruited and undergo a screening visit prior to being randomized to receive a single treatment of WBH or sham. The primary endpoint will be measurement of Interleukin-6 (IL-6) and other inflammation associated proteins (cytokines and heat shock proteins) in the plasma at one hour, 24h and one-week post WBH. A further endpoint is treatment response defined by a decrease of 50% or more in the Inventory of Depressive Symptomatology, Clinician-Rated (IDS-CR) score at 7 days post-intervention, 2 weeks post-intervention, and 4 weeks post-intervention.