Abstract
TNF-alpha overexpression may contribute to motor neuron death in amyotrophic lateral sclerosis (ALS). We investigated the intracellular pathway associated with TNF-alpha in the wobbler mouse, a murine model of ALS, at the onset of symptoms. TNF-alpha and TNFR1 overexpression and JNK/p38MAPK phosphorylation occurred in neurons and microglia in early symptomatic mice, suggesting that this activation may contribute to motor neuron damage. The involvement of TNF-alpha was further confirmed by the protective effect of treatment with rhTNF-alpha binding protein (rhTBP-1) from 4 to 9 weeks of age. rhTBP-1 reduced the progression of symptoms, motor neuron loss, gliosis and JNK/p38MAPK phosphorylation in wobbler mice, but did not reduce TNF-alpha and TNFR1 levels. rhTBP-1 might possibly bind TNF-alpha and reduce the downstream phosphorylation of two main effectors of the neuroinflammatory response, p38MAPK and JNK.
Original language | English |
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Pages (from-to) | 465-476 |
Number of pages | 12 |
Journal | Neurobiology of Disease |
Volume | 29 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2008 |
Keywords
- Amyotrophic Lateral Sclerosis/genetics
- Animals
- Cell Count/methods
- Disease Progression
- Female
- Humans
- Male
- Mice
- Mice, Neurologic Mutants
- Motor Neurons/drug effects
- Receptors, Tumor Necrosis Factor, Type I/administration & dosage
- Recombinant Proteins/administration & dosage
- Tumor Necrosis Factor Decoy Receptors/administration & dosage
- Tumor Necrosis Factor-alpha/antagonists & inhibitors