Polymorphisms in the mitochondrial DNA control region and frailty in older adults.
Mitochondria contribute to the dynamics of cellular metabolism, the production of reactive oxygen species, and apoptotic pathways. Consequently, mitochondrial function has been hypothesized to influence functional decline and vulnerability to disease in later life. Mitochondrial genetic variation ma...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2010-06-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC2883558?pdf=render |
| _version_ | 1818892634680197120 |
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| author | Ann Z Moore Mary L Biggs Amy Matteini Ashley O'Connor Sarah McGuire Brock A Beamer M Danielle Fallin Linda P Fried Jeremy Walston Aravinda Chakravarti Dan E Arking |
| author_facet | Ann Z Moore Mary L Biggs Amy Matteini Ashley O'Connor Sarah McGuire Brock A Beamer M Danielle Fallin Linda P Fried Jeremy Walston Aravinda Chakravarti Dan E Arking |
| author_sort | Ann Z Moore |
| collection | DOAJ |
| description | Mitochondria contribute to the dynamics of cellular metabolism, the production of reactive oxygen species, and apoptotic pathways. Consequently, mitochondrial function has been hypothesized to influence functional decline and vulnerability to disease in later life. Mitochondrial genetic variation may contribute to altered susceptibility to the frailty syndrome in older adults.To assess potential mitochondrial genetic contributions to the likelihood of frailty, mitochondrial DNA (mtDNA) variation was compared in frail and non-frail older adults. Associations of selected SNPs with a muscle strength phenotype were also explored. Participants were selected from the Cardiovascular Health Study (CHS), a population-based observational study (1989-1990, 1992-1993). At baseline, frailty was identified as the presence of three or more of five indicators (weakness, slowness, shrinking, low physical activity, and exhaustion). mtDNA variation was assessed in a pilot study, including 315 individuals selected as extremes of the frailty phenotype, using an oligonucleotide sequencing microarray based on the Revised Cambridge Reference Sequence. Three mtDNA SNPs were statistically significantly associated with frailty across all pilot participants or in sex-stratified comparisons: mt146, mt204, and mt228. In addition to pilot participants, 4,459 additional men and women with frailty classifications, and an overlapping subset of 4,453 individuals with grip strength measurements, were included in the study population genotyped at mt204 and mt228. In the study population, the mt204 C allele was associated with greater likelihood of frailty (adjusted odds ratio = 2.04, 95% CI = 1.07-3.60, p = 0.020) and lower grip strength (adjusted coefficient = -2.04, 95% CI = -3.33- -0.74, p = 0.002).This study supports a role for mitochondrial genetic variation in the frailty syndrome and later life muscle strength, demonstrating the importance of the mitochondrial genome in complex geriatric phenotypes. |
| first_indexed | 2024-12-19T17:59:49Z |
| format | Article |
| id | doaj.art-ba82350386e04a91847b55d93c3bb6bd |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-19T17:59:49Z |
| publishDate | 2010-06-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-ba82350386e04a91847b55d93c3bb6bd2022-12-21T20:11:42ZengPublic Library of Science (PLoS)PLoS ONE1932-62032010-06-0156e1106910.1371/journal.pone.0011069Polymorphisms in the mitochondrial DNA control region and frailty in older adults.Ann Z MooreMary L BiggsAmy MatteiniAshley O'ConnorSarah McGuireBrock A BeamerM Danielle FallinLinda P FriedJeremy WalstonAravinda ChakravartiDan E ArkingMitochondria contribute to the dynamics of cellular metabolism, the production of reactive oxygen species, and apoptotic pathways. Consequently, mitochondrial function has been hypothesized to influence functional decline and vulnerability to disease in later life. Mitochondrial genetic variation may contribute to altered susceptibility to the frailty syndrome in older adults.To assess potential mitochondrial genetic contributions to the likelihood of frailty, mitochondrial DNA (mtDNA) variation was compared in frail and non-frail older adults. Associations of selected SNPs with a muscle strength phenotype were also explored. Participants were selected from the Cardiovascular Health Study (CHS), a population-based observational study (1989-1990, 1992-1993). At baseline, frailty was identified as the presence of three or more of five indicators (weakness, slowness, shrinking, low physical activity, and exhaustion). mtDNA variation was assessed in a pilot study, including 315 individuals selected as extremes of the frailty phenotype, using an oligonucleotide sequencing microarray based on the Revised Cambridge Reference Sequence. Three mtDNA SNPs were statistically significantly associated with frailty across all pilot participants or in sex-stratified comparisons: mt146, mt204, and mt228. In addition to pilot participants, 4,459 additional men and women with frailty classifications, and an overlapping subset of 4,453 individuals with grip strength measurements, were included in the study population genotyped at mt204 and mt228. In the study population, the mt204 C allele was associated with greater likelihood of frailty (adjusted odds ratio = 2.04, 95% CI = 1.07-3.60, p = 0.020) and lower grip strength (adjusted coefficient = -2.04, 95% CI = -3.33- -0.74, p = 0.002).This study supports a role for mitochondrial genetic variation in the frailty syndrome and later life muscle strength, demonstrating the importance of the mitochondrial genome in complex geriatric phenotypes.http://europepmc.org/articles/PMC2883558?pdf=render |
| spellingShingle | Ann Z Moore Mary L Biggs Amy Matteini Ashley O'Connor Sarah McGuire Brock A Beamer M Danielle Fallin Linda P Fried Jeremy Walston Aravinda Chakravarti Dan E Arking Polymorphisms in the mitochondrial DNA control region and frailty in older adults. PLoS ONE |
| title | Polymorphisms in the mitochondrial DNA control region and frailty in older adults. |
| title_full | Polymorphisms in the mitochondrial DNA control region and frailty in older adults. |
| title_fullStr | Polymorphisms in the mitochondrial DNA control region and frailty in older adults. |
| title_full_unstemmed | Polymorphisms in the mitochondrial DNA control region and frailty in older adults. |
| title_short | Polymorphisms in the mitochondrial DNA control region and frailty in older adults. |
| title_sort | polymorphisms in the mitochondrial dna control region and frailty in older adults |
| url | http://europepmc.org/articles/PMC2883558?pdf=render |
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