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• W2010348069 abstract "Mutations in LRRK2 are the most common genetic cause of Parkinson's disease (PD). Studies in the yeast Saccharomyces cerevisiae have provided valuable insights into the mechanisms of cellular dysfunction associated with the expression of faulty PD genes. We developed a yeast model for full-length LRRK2 studies. We expressed wild-type (wt) LRRK2 and mutations and evaluated their role during oxidative stress conditions. The involvement of mitochondria was assessed by using rho-zero mutants and by evaluating reactive oxygen species (ROS) production and mitochondrial membrane potential by flow cytometry. The involvement of endocytosis was also studied by testing several endocytic mutants and by following the vacuolar delivery of the probe FM4-64. Expression of LRRK2 in yeast was associated to increased hydrogen peroxide resistance. This phenotype, which was dependent on mitochondrial function, was not observed for PD-mutants G2019S and R1441C or in the absence of the kinase activity and the WD40 repeat domain. Expression of the pathogenic mutants stimulated ROS production and increased mitochondrial membrane potential. For the PD-mutants, but not for wild-type LRRK2, endocytic defects were also observed. Additionally, several endocytic proteins were required for LRRK2-mediated protection against hydrogen peroxide. Our results indicate that LRRK2 confers cellular protection during oxidative stress depending on mitochondrial function and endocytosis. Both the loss of capacity of LRRK2 pathogenic mutants to protect against oxidative stress and their enhancement of dysfunction may be important for the development of PD during the aging process." @default.
• W2010348069 created "2016-06-24" @default.
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• W2010348069 date "2014-06-01" @default.
• W2010348069 modified "2023-10-18" @default.
• W2010348069 title "LRRK2, but not pathogenic mutants, protects against H2O2 stress depending on mitochondrial function and endocytosis in a yeast model" @default.
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• W2010348069 doi "https://doi.org/10.1016/j.bbagen.2014.02.015" @default.
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