TY - JOUR
T1 - Label-free proteomics differences in the dorsolateral prefrontal cortex between bipolar disorder patients with and without psychosis
AU - Ho, Ada M.C.
AU - Cabello-Arreola, Alejandra
AU - Markota, Matej
AU - Heppelmann, Carrie J.
AU - Charlesworth, M. Cristine
AU - Ozerdem, Aysegul
AU - Mahajan, Gouri
AU - Rajkowska, Grazyna
AU - Stockmeier, Craig A.
AU - Frye, Mark A.
AU - Choi, Doo Sup
AU - Veldic, Marin
N1 - Publisher Copyright:
© 2020 The Authors
PY - 2020/6/1
Y1 - 2020/6/1
N2 - Background: Psychosis is common in bipolar disorder (BD) and is related to more severe cognitive impairments. Since the molecular mechanism of BD psychosis is elusive, we conducted this study to explore the proteomic differences associated with BD psychosis in the dorsolateral prefrontal cortex (DLPFC; BA9). Methods: Postmortem DLPFC gray matter tissues from five pairs of age-matched male BD subjects with and without psychosis history were used. Tissue proteomes were identified and quantified by label-free liquid chromatography tandem mass spectrometry and then compared between groups. Statistical significance was set at q < 0.40 and Log2 fold change (Log2FC) ≥ |1|. Protein groups with differential expression between groups at p < 0.05 were subjected to pathway analysis. Results: Eleven protein groups differed significantly between groups, including the reduction of tenascin C (q = 0.005, Log2FC = −1.78), the elevations of synaptoporin (q = 0.235, Log2FC = 1.17) and brain-specific angiogenesis inhibitor 1-associated protein 3 (q = 0.241, Log2FC = 2.10) in BD with psychosis. The between-group differences of these proteins were confirmed by Western blots. The top enriched pathways (p < 0.05 with ≥ 3 hits) were the outgrowth of neurons, neuronal cell proliferation, growth of neurites, and outgrowth of neurites, which were all predicted to be upregulated in BD with psychosis. Limitations: Small sample size and uncertain relationships of the observed proteomic differences with illness stage and acute psychosis. Conclusions: These results suggested BD with psychosis history may be associated with abnormalities in neurodevelopment, neuroplasticity, neurotransmission, and neuromodulation in the DLPFC.
AB - Background: Psychosis is common in bipolar disorder (BD) and is related to more severe cognitive impairments. Since the molecular mechanism of BD psychosis is elusive, we conducted this study to explore the proteomic differences associated with BD psychosis in the dorsolateral prefrontal cortex (DLPFC; BA9). Methods: Postmortem DLPFC gray matter tissues from five pairs of age-matched male BD subjects with and without psychosis history were used. Tissue proteomes were identified and quantified by label-free liquid chromatography tandem mass spectrometry and then compared between groups. Statistical significance was set at q < 0.40 and Log2 fold change (Log2FC) ≥ |1|. Protein groups with differential expression between groups at p < 0.05 were subjected to pathway analysis. Results: Eleven protein groups differed significantly between groups, including the reduction of tenascin C (q = 0.005, Log2FC = −1.78), the elevations of synaptoporin (q = 0.235, Log2FC = 1.17) and brain-specific angiogenesis inhibitor 1-associated protein 3 (q = 0.241, Log2FC = 2.10) in BD with psychosis. The between-group differences of these proteins were confirmed by Western blots. The top enriched pathways (p < 0.05 with ≥ 3 hits) were the outgrowth of neurons, neuronal cell proliferation, growth of neurites, and outgrowth of neurites, which were all predicted to be upregulated in BD with psychosis. Limitations: Small sample size and uncertain relationships of the observed proteomic differences with illness stage and acute psychosis. Conclusions: These results suggested BD with psychosis history may be associated with abnormalities in neurodevelopment, neuroplasticity, neurotransmission, and neuromodulation in the DLPFC.
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U2 - 10.1016/j.jad.2020.03.105
DO - 10.1016/j.jad.2020.03.105
M3 - Article
C2 - 32339108
AN - SCOPUS:85083307109
SN - 0165-0327
VL - 270
SP - 165
EP - 173
JO - Journal of Affective Disorders
JF - Journal of Affective Disorders
ER -