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Type of publication: Journal Article
Type of document: Full Paper

Year: 2004

Authors: Nitsch, R; Pohl, EE; Smorodchenko, A; Infante-Duarte, C; Aktas, O; Zipp, F

Title: Direct impact of T cells on neurons revealed by two-photon microscopy in living brain tissue.

Source: J Neurosci. 2004; 24(10):2458-2464

Authors Vetmeduni Vienna:

Pohl Elena
Smorodchenko Alina

Encephalitogenic T cells invade the brain during neuroinflammation such as multiple sclerosis (MS), inducing damage to myelin sheaths and oligodendrocytes. Only recently, neuronal structures were reported to be a crucial target in the disease. Here, two-photon microscopy using ion-sensitive dyes revealed that within the complex cellular network of living brain tissue, proteolipid protein (PLP)-specific T cells and T cells recognizing the nonmurine antigen ovalbumin (OVA) directly and independently of the major histocompatibility complex (MHC) contact neurons in which they induce calcium oscillations. T cell contact finally resulted in a lethal increase in neuronal calcium levels. This could be prevented by blocking both perforin and glutamate receptors. For the first time, our data provide direct insight into the activity of T cells in the living brain and their detrimental impact on neurons.

Keywords Pubmed: Animals
Calcium Signaling/drug effects
Calcium Signaling/physiology
Cell Communication/immunology
Cell Communication/physiology
Enzyme Inhibitors/pharmacology
Fluorescent Dyes
Membrane Glycoproteins/antagonists & inhibitors
Mice, Inbred Strains
Myelin Proteolipid Protein/immunology
Neurons/drug effects
Pore Forming Cytotoxic Proteins
T-Lymphocytes/drug effects

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