IL6 and schizophrenia: Pillai et al. (2015) reported a positive correlation between increased serum levels of VEGF and IL-6 in patients with schizophrenia. Taken together, these data support the hypothesis that inflammation may be an important contributor to the etiology of schizophrenia (Fan et al., 2007; Potvin et al., 2008; Drexhage et al., 2010).