Cited by 32Muscle Physiology and DisordersNutrition and Health in AgingGenetics, Aging, and Longevity in Model Organisms

A neurogenic perspective of Sarcopenia: time course study of sciatic nerves from aging mice

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Krishnan, Vidya S., White, Zoe, McMahon, Chris D., Hodgetts, Stuart I., Fitzgerald, Melinda, Shavlakadze, Tea, Harvey, Alan R., Grounds, Miranda D.·2016·Journal of Neuropathology & Experimental Neurology

Abstract

To elucidate the neural basis for age-related sarcopenia, we quantified morphologic and molecular changes within sciatic nerves of aging male and female C57BL/6J mice aged between 3 and 27 months using immunoblotting, immunohistochemistry, and electron microscopy. Protein analyses by immunoblotting of nerves of male mice aged 4, 15, 18, 22, and 24 months showed increased levels of heavy chain SMI-32-positive neurofilaments, vimentin, tau5, choline acetyltransferase (ChAT), and p62 by 18-22 months. Similar protein increases were seen in 26-month-old compared with 3-month-old female mice. Immunostaining of longitudinal sections of old (27-month-old) male sciatic nerves revealed intense staining for tau5 and p62 that was increased compared with that at 3 months, but there were decreased numbers of axon profiles stained for ChAT or isolectin B4 (motor and sensory axons, respectively). Ultrastructural analysis revealed electron-dense aggregates within axons in peripheral nerves of old male mice; the proportion of axons that contained aggregates more than doubled between 15 and 27 months. Overall, the observed age-related accumulation of many proteins from about 18 months of age onward suggests impaired mechanisms for axonal transport and protein turnover. These peripheral nerve changes may contribute to the morphological and functional muscle deficits associated with sarcopenia.

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Authors
Krishnan, V. S., White, Z., McMahon, C. D., Hodgetts, S. I., Fitzgerald, M., Shavlakadze, T., Harvey, A. R., & Grounds, M. D.
Affiliations
The University of Western Australia (AU)
Venue
Journal of Neuropathology & Experimental Neurology
Published
2016-03-30
Volume
75
Issue
5
Pages
464-478
ISSN
  • 0022-3069 (ISSN-L)
  • 1554-6578
OpenAlex
W2334243160
Cited by
32
References
119
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 3 · 2021: 3 · 2020: 6 · 2019: 5 · 2018: 5 · 2017: 4 · 2016: 2
FWCI
2.77
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuropathology & Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • UWA Profiles and Research Repository (University of Western Australia) (acceptedVersion, other-oa)
  • UWA Profiles and Research Repository (UWA) (submittedVersion, other-oa)
  • eSpace (Curtin University) (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • Curtin University of Technology
  • National Health and Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
sarcopenia, aging, sciatic nerve, peripheral nerve degeneration, neurofilaments, p62, choline acetyltransferase, axonal transport, protein turnover, sex differences, age-related muscle loss, C57BL/6J mice
MeSH terms
Age Factors, Aging, Animals, Female, Male, Mice, Inbred C57BL, Sciatic Nerve, Mice, Sarcopenia

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