IJMS, Vol. 24, Pages 9106: Kidney-Related Function of Mitochondrial Protein Mitoregulin

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IJMS, Vol. 24, Pages 9106: Kidney-Related Function of Mitochondrial Protein Mitoregulin

International Journal of Molecular Sciences doi: 10.3390/ijms24109106

Authors:
Olga A. Averina
Oleg A. Permyakov
Mariia A. Emelianova
Ekaterina A. Guseva
Olga O. Grigoryeva
Maxim L. Lovat
Anna E. Egorova
Andrei V. Grinchenko
Vadim V. Kumeiko
Maria V. Marey
Vasily N. Manskikh
Olga A. Dontsova
Mikhail Y. Vyssokikh
Petr V. Sergiev

A small protein, Mitoregulin (Mtln), localizes in mitochondria and contributes to oxidative phosphorylation and fatty acid metabolism. Mtln knockout mice develop obesity on a high-fat diet, demonstrating elevated cardiolipin damage and suboptimal creatine kinase oligomerization in muscle tissue. Kidneys heavily depend on the oxidative phosphorylation in mitochondria. Here we report kidney-related phenotypes in aged Mtln knockout mice. Similar to Mtln knockout mice muscle mitochondria, those of the kidney demonstrate a decreased respiratory complex I activity and excessive cardiolipin damage. Aged male mice carrying Mtln knockout demonstrated an increased frequency of renal proximal tubules’ degeneration. At the same time, a decreased glomerular filtration rate has been more frequently detected in aged female mice devoid of Mtln. An amount of Mtln partner protein, Cyb5r3, is drastically decreased in the kidneys of Mtln knockout mice.

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