Zoltán Urbányi

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Previously we have reported serum amyloid P component (SAP) induced cell death in cerebro-cortical cultures of rat brain. In this paper we studied the types of target cells and the molecular mechanism of SAP-induced cell death. Immuno-electron and light microscopy revealed that SAP penetrates the plasma membrane and translocates selectively into the nuclei(More)
Serum amyloid P component (SAP)-induced neuronal apoptosis has been demonstrated on the primary culture of embryonic rat cerebral cortex in vitro. Here we present pieces of evidence that cell death is also induced by serum amyloid P component in living rat brain similarly to that in cell culture. Intrahippocampally administered SAP diffuses from the site of(More)
Endotoxin challenge leads to septic shock, multi-organ failure and death in mice. Permeability of the blood-brain barrier (BBB) is increased by endotoxemia. Serum amyloid P component (SAP) is a lipopolysaccharide (LPS)-binding protein that can modulate the host reactions during infections. It is controversial whether SAP can protect from LPS toxicity in(More)
Serum amyloid P component, a member of pentraxin serum protein family, has been suggested to contribute to the progression of neurodegeneration including Alzheimer's disease by binding to beta-amyloid fibrils leading to an increased stability of the deposits against proteolytic degradation and by inducing neuronal apoptosis. Here, we show that(More)
Studying the interaction between serum amyloid P component (SAP) and beta-amyloid (Abeta) a new Abeta binding site was identified on the SAP near the known binding site at the two bound calcium ions. SAP stabilizes deposits in neurodegenerative diseases, which is manifested via Abeta-binding. Because the inhibition of this interaction is a potential(More)
Neurofibrillary tangles are composed of insoluble aggregates of microtubule-associated protein Tau. In the pathology of Alzheimer's disease (AD), accumulation of hyperphosphorylated Tau results in formation of paired helical filaments. One of the main candidate to hyperphosphorylate Tau in AD is glycogen synthase kinase 3beta (GSK-3beta). Here we introduce(More)
Astrocytes and microglial cells were examined for expression of two immunologically important molecules, major histocompatibility complex class II (MHC-II) and nitric oxide (NO) following treatment with IFN-gamma and beta-amyloid (betaA) peptides, betaA(1-42) and betaA(25-35). IFN-gamma is a potent inducer of both MHC-II gene expression and NO production.(More)
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