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• W1636162490 abstract "The enhanced expression of the trophic factor transforming growth factor alpha (TGF alpha) in reactive astrocytes following CNS injury suggests that TGF alpha has a role in the development of astrogliosis. We explored this hypothesis in the murine mutant wobbler, which presents a progressive motoneuronal degeneration associated with an astrogliosis. Evolution of astrogliosis, and expression of TGF alpha precursor (pro-TGF alpha) and of its receptor were examined over the course of the disease, using genetically diagnosed animals and immunocytochemical techniques. We report here that degenerating motoneurons of the cervical spinal cord and a subset of astrocytes express pro-TGF alpha, prior to the onset of astrogliosis, when the first clinical manifestations of the disease are observed at 4 weeks of age. TGF alpha expression appeared strongly correlated with motoneuronal degeneration. All pro-TGF alpha-immunoreactive neurons exhibited a degenerative morphology, and the number of pro-TGF alpha-immunoreactive neurons increased with the progression of the disease. At the glial level, we observed that astrogliosis was a transitory phenomenon in the wobbler mice, developing in coordination with the motoneuronal expression of pro-TGF alpha. Astrogliosis became evident in 6-week-old wobbler mice, when the number of pro-TGF alpha-immunoreactive motoneurons was maximal, and regressed in older mutant mice in correlation with the disappearance of pro-TGF alpha-immunoreactive motoneurons. Furthermore, TGF alpha/EGF receptor immunoreactivity was exclusively localized in a subset of reactive astrocytes, its expression following closely the course of the astrogliosis. These data show that TGF alpha synthesis by the affected motoneurons is an early event in the course of the wobbler disease, and suggest a role for TGF alpha as a neuronal inducer of astrocytic reactivity." @default.
• W1636162490 created "2016-06-24" @default.
• W1636162490 creator A5016990492 @default.
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• W1636162490 date "1994-07-01" @default.
• W1636162490 modified "2023-09-26" @default.
• W1636162490 title "Transforming growth factor alpha (TGF alpha) expression in degenerating motoneurons of the murine mutant wobbler: a neuronal signal for astrogliosis?" @default.
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• W1636162490 doi "https://doi.org/10.1523/jneurosci.14-07-04206.1994" @default.
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