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Fischer, Roman; Wajant, Harald; Kontermann, Roland; Pfizenmaier, Klaus; Maier, Olaf
Glia, February 2014, Letnik: 62, Številka: 2Journal Article
Tumor necrosis factor (TNF) and its receptors TNFR1 and TNFR2 have pleiotropic effects in neurodegenerative disorders. For example, while TNFR1 mediates neurodegenerative effects in multiple sclerosis, TNFR2 is protective and contributes to remyelination. The exact mode of TNFR2 action, however, is poorly understood. Here, we show that TNFR2‐mediated activation of the PI3K‐PKB/Akt pathway in primary astrocytes increased the expression of neuroprotective genes, including that encoding the neurotrophic cytokine leukemia inhibitory factor (LIF). To investigate whether intercellular signaling between TNFR2‐stimulated astrocytes and oligodendrocytes plays a role in oligodendrocyte maturation, we established an astrocyte–oligodendrocyte coculture model, composed of primary astrocytes from huTNFR2‐transgenic (tgE1335) mice and oligodendrocyte progenitor cells (OPCs) from wild‐type mice, capable of differentiating into mature myelinating oligodendrocytes. In this model, selective stimulation of human TNFR2 on astrocytes, promoted differentiation of cocultured OPCs to myelin basic protein‐positive mature oligodendrocytes. Addition of LIF neutralizing antibodies inhibited oligodendrocyte differentiation, indicating a crucial role of TNFR2‐induced astrocyte derived LIF for oligodendrocyte maturation. GLIA 2014;62:272–283
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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