Lamina-specific association between reduced mRNA levels of tyrosine kinase b and glutamate decarboxylase 67 in the orbitofrontal cortex in bipolar disorder: A possible reflective of defective connectivity in bipolar disorder
| Autor: | J. E. Park, J. Choi, S.-B. Jung, J.-C. Lee, I. B. Kim |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | European Psychiatry, Vol 66, Pp S200-S200 (2023) |
| Druh dokumentu: | article |
| ISSN: | 0924-9338 1778-3585 |
| DOI: | 10.1192/j.eurpsy.2023.471 |
| Popis: | Introduction Lamina-specific alterations of inhibitory circuitries have been considered the crucial pathogenesis of perceptual, cognitive and behavioral symptoms presented in schizophrenia and mood disorders. Especially, with emerging evidences indicating the close lamina-specific relationship between synaptic defects and γ-Aminobutyric acid (GABA)-related gene dysfunctions, it has been suggested the mRNA dysregulations of Tyrosine kinase B (TrkB) and Glutamate decarboxylase 67 (GAD67) could particularly be implicated in middle and deep layers of neocortex of patients with major psychiatric disorders. Objectives Giving inquiries of whether defects of these mRNA levels in Orbitofrontal cortex (OFC) would be involved as lamina-specific patterns in individuals with schizophrenia and mood disorders. Methods We examined mRNA levels of BDNF, TrkB and GAD67 in each OFC layer I through VI. We analyzed data from postmortem brain tissue of the Stanley Neuropathology Consortium Integrative Database (SNCID). SNCID consists of 15 subjects in each of four groups (schizophrenia, bipolar disorder, major depression without psychotic features, and unaffected controls). All groups were matched for age, sex, race, brain pH and post-mortem interval. Results We found TrkB mRNA levels to be significantly reduced in layer VI in both groups with schizophrenia (25.8%) and bipolar disorder (35.7%) compared with controls. GAD67 mRNA levels were also significantly reduced in layer III and IV in patients with schizophrenia (23.4% and 22.7%, respectively) and bipolar disorder (31.2% and 24.9%, respectively) compared with controls. Individuals with major depression showed only trends toward decreased mRNA levels of GAD67 in layer III and IV and of TrkB in layer VI compared with controls. TrkB mRNA levels in layer VI were significantly correlated with GAD67 mRNA levels in layer III (ρ=0.581, p=0.037) and IV (ρ=0.857, p |
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