Please use this identifier to cite or link to this item:
Title: The age-associated decrease in the amount of amplifiable full-length mitochondrial DNA in human skeletal muscle.
Epworth Authors: Kovalenko, Sergey
Other Authors: Kopsidas, George
Islam, M.
Heffernan, D.
Fitzpatrick, John
Caragounis, Aphrodite
Linnane, Anthony
Keywords: Age-Related Atrophy
Muscle Aging
Soleus Muscle
Cytochrome C Oxidase Activity
Full-Length Mitochondrial DNA
Bioenergy Capacity
Centre for Molecular Biology and Medicine, Epworth Medical Centre, Richmond, Victoria, Australia
Issue Date: 2002
Publisher: Springer
Citation: Biogerontology. 2002;3(1-2):25-7
Abstract: A variety of techniques have been applied to investigate the interrelationship between age-related atrophy of rat soleus muscle and other signs of muscle aging, such as changes in muscle fibre type composition, decrease in bioenergy capacity and accumulation of mitochondrial DNA (mtDNA) arrangements. Age-related atrophy of rat soleus muscle was shown to start at the age of about 28 months. It was accompanied by a decrease in the number of slow twitch muscle fibres (type I) and an increase in the proportion of muscle fibres co-expressing slow and fast myosins (type Ic and IIc fibres). Bioenergy capacity of the soleus muscle, assessed by the level of measurable cytochrome c oxidase (COX) activity, was found to be decreased both in the middle age and old rats compared to the young animals. Muscle atrophy was also accompanied by a decrease in the amount of full-lengthmitochondrial DNA (FL-mtDNA) amplifiable by the extra-long PCR (XL-PCR) and the increase in the number of mtDNA deletions. The results of the study show that the decline in the bioenergy capacity of the rat soleus occurs by the middle age. It is followed by the onset of the age-related muscle atrophy that is accompanied by both fibre type changes and functional mtDNA degradation.
DOI: 10.1023/a:1015295011131
PubMed URL:
ISSN: 1573-6768
Journal Title: Biogerontology
Type: Journal Article
Type of Clinical Study or Trial: Observational Study
Appears in Collections:Pre-Clinical

Files in This Item:
There are no files associated with this item.

Items in Epworth are protected by copyright, with all rights reserved, unless otherwise indicated.