Abstract: The present invention provides, inter alia, methods for identifying a candidate agent that may be effective to treat or ameliorate an effect of a neurodegenerative disease in a subject. These methods include: (a) contacting a wildtype neuron and a mutant neuron with a stressor which is effective to accelerate the degeneration of the mutant neuron; (b) further contacting the wildtype neuron and the mutant neuron from step (a) with a candidate agent; and (c) determining whether the candidate agent lowers a wildtype to mutant survival ratio or increases both wildtype and mutant neuron survival.