TABLE 1

Comparison of clinical, biochemical, and genetic characteristics between ASD and schizophrenia

ASD
ClinicalBehavioral flexibility, delay of language, social cognitive deficits.a Worse performance than schizophrenia children in the theory of mind task.b Manifests in early childhood.a
BiochemicalDisturbances in glutamate, GABA, and dopamine neurotransmission.c Increases in proinflammatory cytokine (IL-1β, IL-6, TNF-α, IFN-γ) levels in the brain, CSF, and blood.d No alterations in anti-inflammatory cytokine (IL-4, IL-10) levels in the blood.e
GeneticCNTNAP2, NLGN, NRXN, SHANK3, CADM1, etc.f
Schizophrenia
ClinicalPositive, negative, cognitive symptoms (social cognitive deficits).g Develops in late adolescence most frequently.g
BiochemicalDisturbances in glutamate, GABA, and dopamine neurotransmission.g Increases in proinflammatory cytokine (IL-1β, IL-6, TNF-α) levels in the brain, CSF, and blood.h Reduction of anti-inflammatory cytokine (IL-10, IL-13) levels in the CSF and blood.h
GeneticDISC1, DTNBP1, NRG1, DRD2, HTR2A, COMT, etc.i
  • CADM1, cell adhesion molecule 1; COMT, catechol-O-methyltransferase; DISC1, disrupted in schizophrenia 1; DRD2, dopamine receptor D2; DTNBP1, dystrobrevin-binding protein 1; GABA, γ-aminobutyric acid; HTR2A, 5-hydroxytryptamine (serotonin) receptor 2A; NLGN, neuroligin; NRG1, neuregulin 1; NRXN, neurexin; SHANK3, Src homology 3 and multiple ankyrin repeat domain 3; TNF-α, tumor necrosis factor-α.

  • a Volkmar et al., 2014.

  • b Pilowsky et al., 2000.

  • c Money and Stanwood, 2013.

  • d Onore et al., 2012.

  • e Ashwood et al., 2011b.

  • f Bourgeron, 2009.

  • g Stahl, 2013.

  • h Meyer et al., 2011b.

  • i Gejman et al., 2010.