Lithium Prevents Telomere Shortening in Cortical Neurons in Amyloid-Beta Induced Toxicity

BackgroundThere is consistent evidence of the potential benefits of lithium attenuating mechanisms of neurodegeneration, including those related to the pathophysiology of Alzheimer’s disease (AD), and facilitating neurotrophic and protective responses, including maintenance of telomere length. The aim was to investigate the protective effect of the pre-treatment with lithium on amyloid-beta (Aβ)-induced toxicity and telomere length in neurons. MethodsCortical neurons were treated with lithium chloride at therapeutic and subtherapeutic concentrations (2mM, 0.2mM and 0.02mM) for seven days. Amyloid toxicity was induced 24 hours before the end of lithium treatment. ResultsLithium resulted in 120% (2mM), 180% (0.2mM) and 140% (0.02mM) increments in telomere length as compared to untreated controls. Incubation with Aβ1-42 was associated with significant reductions in MTT uptake (33%) and telomere length (83%) as compared to controls. ConclusionsLithium prevented loss of culture viability and telomere shortening in neuronal cultures challenged with Aβ fibrils.