Lithium Prevents Telomere Shortening in Cortical Neurons in Amyloid-Beta Induced Toxicity
Rafael M. Themoteo,
Vanessa J. R. De Paula,
Nicole K. R. Rocha,
Helena Brentani,
Orestes V. Forlenza
Affiliations
Rafael M. Themoteo
Laboratory of Neuroscience (LIM-27), Departamento e Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo 05508-090, SP, Brazil
Vanessa J. R. De Paula
Laboratory of Neuroscience (LIM-27), Departamento e Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo 05508-090, SP, Brazil
Nicole K. R. Rocha
Laboratory of Neuroscience (LIM-27), Departamento e Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo 05508-090, SP, Brazil
Helena Brentani
Laboratory of Psychobiology (LIM-23), Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo 05508-090, SP, Brazil
Orestes V. Forlenza
Laboratory of Neuroscience (LIM-27), Departamento e Instituto de Psiquiatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, Sao Paulo 05508-090, SP, Brazil
Background: There 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. Methods: Cortical neurons were treated with lithium chloride at therapeutic and subtherapeutic concentrations (2 mM, 0.2 mM and 0.02 mM) for seven days. Amyloid toxicity was induced 24 h before the end of lithium treatment. Results: Lithium resulted in 120% (2 mM), 180% (0.2 mM) and 140% (0.02 mM) 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. Conclusions: Lithium prevented loss of culture viability and telomere shortening in neuronal cultures challenged with Aβ fibrils.
