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Pineal Abnormalities in Psychosis and Mood Disorders: A Systematic Review
Authors
A Barbanta
S Chauhan
U Ettinger
V Kumari
Publication date
20 May 2023
Publisher
'MDPI AG'
Doi
Abstract
Data Availability Statement: Not applicableSupplementary Materials: The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/brainsci13050827/s1, Table S1: Newcastle-Ottawa Quality Assessment Scale (NOS) scores for the selected studies., Table S2: Critical Appraisal Skills Programme (CASP) scores.Copyright © 2023 by the authors. The pineal gland (PG) is a small interhemispheric brain structure that influences human physiology in many ways, most importantly via secretion of the hormone melatonin which is known to regulate sleep and wakefulness. Here, we systematically reviewed existing neuroimaging studies of PG structure, and/or melatonin release (MLT) in psychosis and mood disorders. Medline, PubMed, and Web of Science databases were searched (on 3 February 2023), yielding 36 studies (8 PG volume, 24 MLT). The findings showed smaller-than-normal PG volume in people with schizophrenia, regardless of symptom severity and illness stage; and smaller-than-normal PG volume in major depression, with some indication of this being present only in certain subgroups, or in those with high scores on the ‘loss of interest’ symptom. There was considerable evidence of lower-than-normal MLT as well as aberrant MLT secretion pattern in schizophrenia. A similar picture, though less consistent than that seen in schizophrenia, emerged in major depression and bipolar disorder, with some evidence of a transient lowering of MLT following the initiation of certain antidepressants in drug-withdrawn patients. Overall, PG and MLT aberrations appear to represent transdiagnostic biomarkers for psychosis and mood disorders, but further work is needed to establish their clinical correlates and treatment implications.This research received no external funding
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Last time updated on 25/05/2023