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Altered apolipoprotein C expression in association with cognition impairments and hippocampus volume in schizophrenia and bipolar disorder
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Date
2017-04-01
Author
Knoechel, Christian
Kniep, Jonathan
Cooper, Jason D.
Stablein, Michael
Wenzler, Sofia
Sarlon, Jan
Prvulovic, David
Linden, David E. J.
Bahn, Sabine
Stocki, Pawel
Özcan Kabasakal, Süreyya
Alves, Gilberto
Carvalho, Andre F.
Reif, Andreas
Oertel-Knoechel, Viola
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Proteomic analyses facilitate the interpretation of molecular biomarker probes which are very helpful in diagnosing schizophrenia (SZ). In the current study, we attempt to test whether potential differences in plasma protein expressions in SZ and bipolar disorder (BD) are associated with cognitive deficits and their underlying brain structures. Forty-two plasma proteins of 29 SZ patients, 25 BD patients and 93 non-clinical controls were quantified and analysed using multiple reaction monitoring-based triple quadrupole mass spectrometry approach. We also computed group comparisons of protein expressions between patients and controls, and between SZ and BD patients, as well. Potential associations of protein levels with cognitive functioning (psychomotor speed, executive functioning, crystallised intelligence) as well as underlying brain volume in the hippocampus were explored, using bivariate correlation analyses. The main finding of this study was that apolipoprotein expression differed between patients and controls and that these alterations in both disease groups were putatively related to cognitive impairments as well as to hippocampus volumes. However, none of the protein level differences were related to clinical symptom severity. In summary, altered apolipoprotein expression in BD and SZ was linked to cognitive decline and underlying morphological changes in both disorders. Our results suggest that the detection of molecular patterns in association with cognitive performance and its underlying brain morphology is of great importance for understanding of the pathological mechanisms of SZ and BD, as well as for supporting the diagnosis and treatment of both disorders.
Subject Keywords
APOC
,
MRM
,
SMRT
,
Psychosis spectrum
,
Bipolar
,
Schizophrenia
,
Proteomics
URI
https://hdl.handle.net/11511/35001
Journal
EUROPEAN ARCHIVES OF PSYCHIATRY AND CLINICAL NEUROSCIENCE
DOI
https://doi.org/10.1007/s00406-016-0724-3
Collections
Department of Chemistry, Article