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Metabolically induced intracellular pH changes activate mitophagy, autophagy, and cell protection in familial forms of Parkinson's disease
Author(s) -
Komilova Nafisa R.,
Angelova Plamena R.,
Berezhnov Alexey V.,
Stelmashchuk Olga A.,
Mirkhodjaev Ulugbek Z.,
Houlden Henry,
Gourine Alexander V.,
Esteras Noemi,
Abramov Andrey Y.
Publication year - 2022
Publication title -
the febs journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 204
eISSN - 1742-4658
pISSN - 1742-464X
DOI - 10.1111/febs.16198
Subject(s) - mitophagy , autophagy , neurodegeneration , microbiology and biotechnology , cytosol , intracellular , pink1 , mitochondrion , programmed cell death , chemistry , oxidative stress , biochemistry , biology , apoptosis , medicine , enzyme , disease
Parkinson's disease (PD) is a progressive neurodegenerative disorder induced by the loss of dopaminergic neurons in midbrain. The mechanism of neurodegeneration is associated with aggregation of misfolded proteins, oxidative stress, and mitochondrial dysfunction. Considering this, the process of removal of unwanted organelles or proteins by autophagy is vitally important in neurons, and activation of these processes could be protective in PD. Short‐time acidification of the cytosol can activate mitophagy and autophagy. Here, we used sodium pyruvate and sodium lactate to induce changes in intracellular pH in human fibroblasts with PD mutations (Pink1, Pink1/Park2, α‐synuclein triplication, A53T). We have found that both lactate and pyruvate in millimolar concentrations can induce a short‐time acidification of the cytosol in these cells. This induced activation of mitophagy and autophagy in control and PD fibroblasts and protected against cell death. Importantly, application of lactate to acute brain slices of WT and Pink1 KO mice also induced a reduction of pH in neurons and astrocytes that increased the level of mitophagy. Thus, acidification of the cytosol by compounds, which play an important role in cell metabolism, can also activate mitophagy and autophagy and protect cells in the familial form of PD.