ArticleSchizophrenia bulletin2026
Association Between Peptide Antigen-Related Antibody Levels and the Short- and Long-Term Efficacy of Antipsychotic Treatment in Drug-Naïve First-Episode Schizophrenia Patients.
Article in Schizophrenia bulletin, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveThis study investigated the relationships between baseline peptide antigen-related IgG levels and 8-week antipsychotic drug (APD) treatment response rates and one-year treatment outcomes, as well as the relationships between changes in peptide antigen-related IgG levels and one-year treatment outcomes, in first-episode schizophrenia (FES) patients.
methodsSixteen peptide antigen-related IgGs from proteins encoded by schizophrenia-related genes were selected on the basis of several selection criteria from a 2022 genome-wide association study. Novel peptide antigen-related IgG levels were measured in drug-naïve FES patients at baseline (n = 155) and in plasma samples from 60 healthy controls (HCs). At the one-year follow-up, 57 patients completed both symptom and autoantibody assessments. Statistical analyses included t tests, Pearson correlation analysis, linear regression analysis, linear mixed-effects models, and simple slope analysis.
resultsAnti-MOB4 IgG and anti-PDIA3 IgG levels were significantly lower in drug-naïve FES patients compared to HCs and showed a negative correlation with baseline excitement factor scores. Baseline anti-EMB IgG levels were associated with the 8-week treatment response, whereas anti-MAD1L1 IgG levels were correlated with one-year outcomes in drug-naïve FES patients. The one-year trajectory of changes in anti-FURIN IgG, anti-MAPK3 IgG, and anti-ACTR1B IgG levels was related to remission.
conclusionThis study revealed that patients with schizophrenia had autoimmune abnormalities, with different peptide antigen-related IgG being associated with short-term or long-term treatment efficacy, and that these antibody levels were regulated by APDs.
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