Macrophage colony stimulating factor (M-CSF) exacerbates ALS disease in a mouse model through altered responses of microglia expressing mutant superoxide dismutase |
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Authors: | Genevieve Gowing Mélanie Lalancette-Hébert Jean-Nicolas Audet Florence Dequen Jean-Pierre Julien |
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Institution: | 1. Department of Neurobiology, Tel-Aviv University, Israel;2. Australian Regenerative Medicine Institute, Monash University, VIC, Australia;3. Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, Department of Ophthalmology, the University of Melbourne, East Melbourne VIC, Australia |
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Abstract: | Macrophage colony stimulating factor (M-CSF) is a cytokine that regulates the survival, proliferation and maturation of microglial cells. Administration of M-CSF can promote neuronal survival in various models of central nervous system (CNS) injury. Here, in an attempt to induce a neuroprotective microglial cell phenotype and enhance motor neuron survival, mutant SOD1G37R transgenic mice were treated, weekly, with M-CSF starting at onset of disease. Unexpectedly, M-CSF accelerated disease progression in SOD1G37R mouse model of ALS. The shortened survival of M-CSF-treated animals was associated with diminished muscle innervation and enhanced adoption of a macrophage-like phenotype by microglial cells characterised by the upregulation of pro-inflammatory cytokines TNF-α and IL-1β and of the phagocytic marker CD68. |
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