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Identification of candidate drugs for the treatment of ALS

A consortium of investigators interested in neurodegenerative diseases collaborated to screen 1040 drugs in multiple neurodegenerative disease assays. One model of amyotrophic lateral sclerosis (ALS) pathogenesis in particular incorporated glutamate exposure in enriched primary rat motor neuron cultures. In this model 78 compounds decreased motor neuron death caused by 100 µM glutamate. Almost all these pharmacological agents act at one or more of the following cellular targets: 1) protein synthesis inhibition; 2) Cox inhibition; 3) regulation of anion flux; 4) modulation of GABA receptors; 5) antioxidant, and 6) cell cycle inhibition. The most prevalent mode of action was the regulation of intracellular calcium. These data extend the understanding of motor neuron degeneration and identify a number of cellular targets for the improvement of combined therapies for neurodegenerative disease.