VEGFA and schizophrenia: There is some evidence to support altered VEGF signalling in schizophrenia (Chu et al. 2009; Frydecka et al. 2018), and one study showed that antipsychotic drugs (haloperidol and olanzapine) increased VEGF signalling in cultured neuronal cells (Jóźwiak-Bębenista et al. 2018).