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Non-Invasive Brain Stimulation Effects on Biomarkers of Tryptophan Metabolism: A Scoping Review and Meta-Analysis

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Publicado en:International Journal of Molecular Sciences vol. 23, no. 17 (2022), p. 9692
Autor principal: Giron, Cristian G
Otros Autores: Lin, Tim T Z, Kan, Rebecca L D, Zhang, Bella B B, Suk Yu Yau, Kranz, Georg S
Publicado:
MDPI AG
Materias:
Antidepressants
Electroconvulsive therapy
Brain research
Serotonin
Restrictions
Metabolism
Schizophrenia
Melatonin
Biomarkers
Nervous system
Animal cognition
Metabolites
Meta-analysis
Neuroplasticity
Acceso en línea:Citation/Abstract
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Resumen:Abnormal activation of the kynurenine and serotonin pathways of tryptophan metabolism is linked to a host of neuropsychiatric disorders. Concurrently, noninvasive brain stimulation (NIBS) techniques demonstrate high therapeutic efficacy across neuropsychiatric disorders, with indications for modulated neuroplasticity underlying such effects. We therefore conducted a scoping review with meta-analysis of eligible studies, conforming with the PRISMA statement, by searching the PubMed and Web of Science databases for clinical and preclinical studies that report the effects of NIBS on biomarkers of tryptophan metabolism. NIBS techniques reviewed were electroconvulsive therapy (ECT), transcranial magnetic stimulation (TMS), and transcranial direct current stimulation (tDCS). Of the 564 search results, 65 studies were included with publications dating back to 1971 until 2022. The Robust Bayesian Meta-Analysis on clinical studies and qualitative analysis identified general null effects by NIBS on biomarkers of tryptophan metabolism, but moderate evidence for TMS effects on elevating serum serotonin levels. We cannot interpret this as evidence for or against the effects of NIBS on these biomarkers, as there exists several confounding methodological differences in this literature. Future controlled studies are needed to elucidate the effects of NIBS on biomarkers of tryptophan metabolism, an under-investigated question with substantial implications to clinical research and practice.
ISSN:1661-6596
1422-0067
DOI:10.3390/ijms23179692
Fuente:Health & Medical Collection