Johann Michael Steiner

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CONTEXT Evidence for symptomatic convergence of schizophrenia and N-methyl-D-aspartate glutamate receptor (NMDA-R) encephalitis highlights the need for an assessment of antibody prevalence and specificity for distinct disease mechanisms in patients with a diagnosis of schizophrenia among glutamatergic pathophysiologic abnormalities in psychiatric disorders.(More)
Glutamatergic mechanisms and resting-state functional connectivity alterations have been recently described as factors contributing to major depressive disorder (MDD). Furthermore, the pregenual anterior cingulate cortex (pgACC) seems to play an important role for major depressive symptoms such as anhedonia and impaired emotion processing. We investigated(More)
OBJECTIVES Suicide has a high prevalence in patients with schizophrenia and affective disorder. Our recent postmortem study [Steiner J, Mawrin C, Ziegeler A, Bielau H, Ullrich O, Bernstein HG, Bogerts B. Distribution of HLA-DR-positive microglia in schizophrenia reflects impaired cerebral lateralization. Acta Neuropathologica (Berl) 2006;112:305-16.](More)
S100B is considered an astrocytic in-situ marker and protein levels in cerebrospinal fluid (CSF) or serum are often used as biomarker for astrocytic damage or dysfunction. However, studies on S100B in the human brain are rare. Thus, the distribution of S100B was studied by immunohistochemistry in adult human brains to evaluate its cell-type specificity.(More)
In the last 10 years, structural, molecular and functional changes in glial cells have become a major focus of interest in the search for the neurobiological foundations of schizophrenia. While neuronal degeneration, as seen in typical degenerative brain diseases, cannot be found in post-mortem brains of psychotic disorders called 'schizophrenia', many(More)
Immune dysfunction, including monocytosis and increased blood levels of interleukin-1, interleukin-6 and tumour necrosis factor α has been observed during acute episodes of major depression. These peripheral immune processes may be accompanied by microglial activation in subregions of the anterior cingulate cortex where depression-associated alterations of(More)
Elevated blood levels of S100B in neuropsychiatric disorders have so far been mainly attributed to glial pathologies. However, increases or dysfunction of adipose tissue may be alternatively responsible. Our study assessed S100B serum levels in 60 adult subjects without a prior history of neuropsychiatric disorders. S100B concentrations were closely(More)
This review describes a key role for mononuclear phagocytes in the pathogenesis of major psychiatric disorders. There is accumulating evidence for activation of microglia (histopathology and PET scans) and circulating monocytes (enhanced gene expression of immune genes, an overproduction of monocyte/macrophage-related cytokines) in patients with bipolar(More)
focusing on G E interactions, logistic regression analyses were performed to evaluate main effects of SNP genotype coded either as number of risk-associated alleles or as separate variables for the presence of one and two alleles. No significant main effects were found for SNP genotype coded in either form, including when CTFS was added to these models. The(More)
Recent meta-analyses showed consistently elevated levels of S100B in serum and cerebrospinal fluid of schizophrenic patients. This finding has been attributed to glial pathology because S100B is produced by astrocytes and oligodendrocytes. However, S100B may be likewise associated with schizophrenia-related disturbances in glial cell as well as adipocyte(More)