HAT Tip60 restores learning and memory defects in ALS Drosophila model
Visha Parmar, Priyalakshmi Panikker, Mariah Beaver, and Felice Elefant
Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease that attacks motor neurons, leading to paralysis, locomotive defects, and cognitive impairments. Epigenetic studies have shown that decreased histone acetyltransferase (HAT) activity, increased histone deacetylase (HDAC) activity, or overexpression of critical genes lead to the onset ofALS. Tip60, an important HAT greatly studied in Alzheimer’s disease (AD) in our lab, has been shown to have potential neuroprotective roles in learning, memory, locomotion, synaptic plasticity, and axonal transport and outgrowth. Here, we investigated if increasing Tip60 HAT levels rescues cognitive impairments in Drosophila ALS model that overexpresses Vap-33-1, a VAPB protein homolog associated with ALS. We hypothesized that increasing Tip60 HAT levels will rescue ALS-related cognitive impairments in the Drosophila larvae. To test the hypothesis, we carried out a single odor paradigm for olfactory associative learning using sucrose as the gustatory reinforcer and Linalool as the associative odor. We show that ALS larvae exhibited defects in learning and short-term memory. Importantly, these impairments were partially rescued by increasing Tip60 HAT levels. Together, our findings suggest a neuroprotective role for Tip60 in restoring short-term memory defects seen in ALS Drosophila larvae.