Mitochondrial proteomic profiling reveals increased carbonic anhydrase II in aging and neurodegeneration

Pollard, Amelia and Shephard, Freya and Freed, James and Liddell, Susan and Chakrabarti, Lisa (2016) Mitochondrial proteomic profiling reveals increased carbonic anhydrase II in aging and neurodegeneration. Aging . ISSN 1945-4589

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Abstract

Carbonic anhydrase inhibitors are used to treat glaucoma and cancers. Carbonic anhydrases perform a crucial role in the conversion of carbon dioxide and water into bicarbonate and protons. However, there is little information about carbonic anhydrase isoforms during the process of ageing. Mitochondrial dysfunction is implicit in ageing brain and muscle. We have interrogated isolated mitochondrial fractions from young adult and middle aged mouse brain and skeletal muscle. We find an increase of tissue specific carbonic anhydrases in mitochondria from middle-aged brain and skeletal muscle. Mitochondrial carbonic anhydrase II was measured in the Purkinje cell degeneration (pcd5J) mouse model. In pcd5J we find mitochondrial carbonic anhydrase II is also elevated in brain from young adults undergoing a process of neurodegeneration. We show C.elegans exposed to carbonic anhydrase II have a dose related shorter lifespan suggesting that high CAII levels are in themselves life limiting. We show for the first time that the mitochondrial content of brain and skeletal tissue are exposed to significantly higher levels of active carbonic anhydrases as early as in middle-age. Carbonic anhydrases associated with mitochondria could be targeted to specifically modulate age related impairments and disease.

Item Type: Article
Keywords: mitochondria; ageing; skeletal muscle; brain; proteomics; carbonic anhydrase
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences
University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Veterinary Medicine and Science
Identification Number: https://doi.org/10.18632/aging.101064
Depositing User: Blay, James
Date Deposited: 25 Oct 2016 10:04
Last Modified: 25 Oct 2016 10:06
URI: http://eprints.nottingham.ac.uk/id/eprint/37875

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