CXCL8 and schizophrenia: In this work, we found significantly higher serum levels of proinflammatory (IFN-γ, IL-5, IL-6, IL-8, IL-15, and TNF-α) and anti-inflammatory (TGF-α, IL-10, and IL-1RA) cytokines in patients with schizophrenia than in healthy individuals.