
In Parkinson's disease, α-synuclein is known to activate microglia and this activation has been proposed as one of the mechanisms of neurodegeneration. There are several signals produced by neurons that have an anti-inflammatory action on microglia, including CX3CL1 (fractalkine). We have shown that a soluble form of CX3CL1 is required to reduce neuron loss in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated mice and that fractalkine agonism can reduce neuron loss in a 6-hydroxydopamine lesion model. Here, we show that fractalkine can reduce α-synuclein-mediated neurodegeneration in rats. Rats that received fractalkine showed abrogated loss of tyrosine hydroxylase and Neu-N staining. This was replicated in animals where we expressed fractalkine from astrocytes with the glial fibrillary acid protein (GFAP) promoter. Interestingly, we did not observe a reduction in MHCII expression suggesting that soluble fractalkine is likely altering the microglial state to a more neuroprotective one rather than reducing antigen presentation.
Male, Genetic Vectors, Nerve Tissue Proteins, Mice, Parkinsonian Disorders, Drug Discovery, Glial Fibrillary Acidic Protein, Genetics, Animals, Parkinson Disease, Secondary, Oxidopamine, Promoter Regions, Genetic, Molecular Biology, Pharmacology, Neurons, Antigen Presentation, Chemokine CX3CL1, Histocompatibility Antigens Class II, Genetic Therapy, Dependovirus, Gene Expression Regulation, 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine, Astrocytes, Molecular Medicine, Microglia
Male, Genetic Vectors, Nerve Tissue Proteins, Mice, Parkinsonian Disorders, Drug Discovery, Glial Fibrillary Acidic Protein, Genetics, Animals, Parkinson Disease, Secondary, Oxidopamine, Promoter Regions, Genetic, Molecular Biology, Pharmacology, Neurons, Antigen Presentation, Chemokine CX3CL1, Histocompatibility Antigens Class II, Genetic Therapy, Dependovirus, Gene Expression Regulation, 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine, Astrocytes, Molecular Medicine, Microglia
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