Study of age-dependent structural and functional changes of mitochondria in skeletal muscles and heart of naked mole rats (Heterocephalus glaber)
- Authors: Holtze S.1, Eldarov C.M.2, Vays V.B.2, Vangeli I.M.2, Vysokikh M.Y.2, Bakeeva L.E.2, Skulachev V.P.2, Hildebrandt T.B.1
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Affiliations:
- Leibniz Institute for Zoo and Wildlife Research, Department of Reproduction Management
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
- Issue: Vol 81, No 12 (2016)
- Pages: 1429-1437
- Section: Phenoptosis (Special Issue)
- URL: https://journals.rcsi.science/0006-2979/article/view/151129
- DOI: https://doi.org/10.1134/S000629791612004X
- ID: 151129
Cite item
Abstract
Morphometric analysis of mitochondria in skeletal muscles and heart of 6- and 60-month-old naked mole rats (Heterocephalus glaber) revealed a significant age-dependent increase in the total area of mitochondrial cross-sections in studied muscle fibers. For 6- and 60-month-old animals, these values were 4.8 ± 0.4 and 12.7 ± 1.8%, respectively. This effect is mainly based on an increase in the number of mitochondria. In 6-month-old naked mole rats, there were 0.23 ± 0.02 mitochondrial cross-sections per μm2 of muscle fiber, while in 60-month-old animals this value was 0.47 ± 0.03. The average area of a single mitochondrial cross-section also increased with age in skeletal muscles–from 0.21 ± 0.01 to 0.29 ± 0.03 μm2. Thus, naked mole rats show a drastic enlargement of the mitochondrial apparatus in skeletal muscles with age due to an increase in the number of mitochondria and their size. They possess a neotenic type of chondriome accompanied by specific features of mitochondrial functioning in the state of oxidative phosphorylation and a significant decrease in the level of matrix adenine nucleotides.
Keywords
About the authors
S. Holtze
Leibniz Institute for Zoo and Wildlife Research, Department of Reproduction Management
Author for correspondence.
Email: holtze@izw-berlin.de
Germany, Berlin, 10315
C. M. Eldarov
Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
Email: bakeeva@belozersky.msu.ru
Russian Federation, Moscow, 119991
V. B. Vays
Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
Email: bakeeva@belozersky.msu.ru
Russian Federation, Moscow, 119991
I. M. Vangeli
Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
Email: bakeeva@belozersky.msu.ru
Russian Federation, Moscow, 119991
M. Yu. Vysokikh
Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
Author for correspondence.
Email: mike@genebee.msu.ru
Russian Federation, Moscow, 119991
L. E. Bakeeva
Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
Author for correspondence.
Email: bakeeva@belozersky.msu.ru
Russian Federation, Moscow, 119991
V. P. Skulachev
Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology
Email: bakeeva@belozersky.msu.ru
Russian Federation, Moscow, 119991
T. B. Hildebrandt
Leibniz Institute for Zoo and Wildlife Research, Department of Reproduction Management
Email: bakeeva@belozersky.msu.ru
Germany, Berlin, 10315