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Cancer and Alzheimer’s disease: intracellular pH scales the metabolic disorders

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Abstract

Alzheimer’s disease (AD) and cancer have much in common than previously recognized. These pathologies share common risk factors (inflammation and aging), with similar epidemiological and biochemical features such as impaired mitochondria. Metabolic reprogramming occurs during aging and inflammation. We assume that inflammation is directly responsible of the Warburg effect in cancer cells, with a decreased oxidative phosphorylation and a compensatory highthroughput glycolysis (HTG). Similarly, the Warburg effect in cancer is thought to support an alkaline intracellular pH (pHi), a key component of unrelenting cell growth. In the brain, inflammation results in increased secretion of lactate by astrocytes. The increased uptake of lactic acid by neurons results in the inverse Warburg effect, such as seen in AD. The neuronal activity is dampened by a fall of pHi. Pronounced cytosol acidification results in decreased mitochondrial energy yield as well as apoptotic cell death. The link between AD and cancer is reinforced by the fact that treatment aiming at restoring the mitochondrial activity have been experimentally shown to be effective in both diseases. Low carb diet, lipoic acid, and/or methylene blue could then appear promising in both sets of these clinically diverse diseases.

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Acknowledgments

We want to thank Eleonore Moine and Jean-François Le Bitoux for the helpful discussions.

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Correspondence to Jorgelindo da Veiga Moreira.

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The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Schwartz, L., Peres, S., Jolicoeur, M. et al. Cancer and Alzheimer’s disease: intracellular pH scales the metabolic disorders. Biogerontology 21, 683–694 (2020). https://doi.org/10.1007/s10522-020-09888-6

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  • DOI: https://doi.org/10.1007/s10522-020-09888-6

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