{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T19:28:43Z","timestamp":1791919723392,"version":"4.3.4"},"reference-count":88,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2023,5,20]],"date-time":"2023-05-20T00:00:00Z","timestamp":1684540800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,9,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background and Hypothesis<\/jats:title>\n                  <jats:p>Intestinal microbiota is intrinsically linked to human health. Evidence suggests that the composition and function of the microbiome differs in those with schizophrenia compared with controls. It is not clear how these alterations functionally impact people with schizophrenia. We performed a systematic review and meta-analysis to combine and evaluate data on compositional and functional alterations in microbiota in patients with psychosis or schizophrenia.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Study design<\/jats:title>\n                  <jats:p>Original studies involving humans and animals were included. The electronic databases PsycINFO, EMBASE, Web of Science, PubMed\/MEDLINE, and Cochrane were systematically searched and quantitative analysis performed.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Study results<\/jats:title>\n                  <jats:p>Sixteen original studies met inclusion criteria (1376 participants: 748 cases and 628 controls). Ten were included in the meta-analysis. Although observed species and Chao 1 show a decrease in diversity in people with schizophrenia compared with controls (SMD = \u22120.14 and \u22120.66 respectively), that did not reach statistical significance. We did not find evidence for variations in richness or evenness of microbiota between patients and controls overall. Differences in beta diversity and consistent patterns in microbial taxa were noted across studies. We found increases in Bifidobacterium, Lactobacillus, and Megasphaera in schizophrenia groups. Variations in brain structure, metabolic pathways, and symptom severity may be associated with compositional alterations in the microbiome. The heterogeneous design of studies complicates a similar evaluation of functional readouts.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusions<\/jats:title>\n                  <jats:p>The microbiome may play a role in the etiology and symptomatology of schizophrenia. Understanding how the implications of alterations in microbial genes for symptomatic expression and clinical outcomes may contribute to the development of microbiome targeted interventions for psychosis.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/schbul\/sbad049","type":"journal-article","created":{"date-parts":[[2023,5,21]],"date-time":"2023-05-21T04:24:25Z","timestamp":1684643065000},"page":"1239-1255","source":"Crossref","is-referenced-by-count":55,"title":["Compositional and Functional Alterations in Intestinal Microbiota in Patients with Psychosis or Schizophrenia: A Systematic Review and Meta-analysis"],"prefix":"10.1093","volume":"49","author":[{"given":"Nuala","family":"Murray","sequence":"first","affiliation":[{"name":"Department of Psychiatry and Neurobehavioural Science, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sukainah","family":"Al Khalaf","sequence":"additional","affiliation":[{"name":"School of Public Health, University College Cork , Cork , Ireland"},{"name":"INFANT Research Centre, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomaz F S","family":"Bastiaanssen","sequence":"additional","affiliation":[{"name":"Department of Anatomy and Neuroscience, University College Cork , Cork , Ireland"},{"name":"APC Microbiome Ireland, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Kaulmann","sequence":"additional","affiliation":[{"name":"School of Public Health, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edgar","family":"Lonergan","sequence":"additional","affiliation":[{"name":"RISE, Early Intervention in Psychosis Service, South Lee Mental Health Services , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John F","family":"Cryan","sequence":"additional","affiliation":[{"name":"Department of Anatomy and Neuroscience, University College Cork , Cork , Ireland"},{"name":"APC Microbiome Ireland, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerard","family":"Clarke","sequence":"additional","affiliation":[{"name":"Department of Psychiatry and Neurobehavioural Science, University College Cork , Cork , Ireland"},{"name":"APC Microbiome Ireland, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ali S","family":"Khashan","sequence":"additional","affiliation":[{"name":"School of Public Health, University College Cork , Cork , Ireland"},{"name":"INFANT Research Centre, University College Cork , Cork , Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karen","family":"O\u2019Connor","sequence":"additional","affiliation":[{"name":"Department of Psychiatry and 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