Evidence map›Paper›PMID 20705127›Full record

ArticleExperimental gerontology2010

Vitamin E and C supplementation reduces oxidative stress, improves antioxidant enzymes and positive muscle work in chronically loaded muscles of aged rats.

Michael J Ryan, Holly J Dudash, Megan Docherty, Kenneth B Geronilla, Brent A Baker, G Gregory Haff, Robert G Cutlip, Stephen E Alway

Open access · greenAbstract read
In one paragraph

Article in Experimental gerontology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 104 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
104citing papers in PubMed, 4 pooled it
9.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

104 citing papers in PubMed, 4 syntheses or guidelines pooled it, 233 citations in OpenAlex.

  1. Pooled it
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  7. The oxidative stress paradigm in arbovirus infections: mechanisms and therapeutic insights.Redox report : communications in free radical research · 2026
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44 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Michael J RyanLaboratory of Muscle Biology and Sarcopenia, Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV 26506, USA.
Holly J Dudash
Megan Docherty
Kenneth B Geronilla
Brent A Baker
G Gregory Haff
Robert G Cutlip
Stephen E Alway
West Virginia University · USNational Institute for Occupational Safety and Health · US

Funding

Id2 REGULATION OF MUSCLE HYPERTROPHY IN AGINGR01AG021530 · NIA · WEST VIRGINIA UNIVERSITY · PI ALWAY, STEPHEN E · 2004 to 2007
$1.0M
NIA NIH HHS R01 AG021530NIA NIH HHS R01AG021530
6 · The paper itself

Abstract

Aging is associated with increased oxidative stress. Muscle levels of oxidative stress are further elevated with exercise. The purpose of this study was to determine if dietary antioxidant supplementation would improve muscle function and cellular markers of oxidative stress in response to chronic repetitive loading in aging. The dorsiflexors of the left limb of aged and young adult Fischer 344 Brown×Norway rats were loaded 3 times weekly for 4.5 weeks using 80 maximal stretch-shortening contractions per session. The contra-lateral limb served as the intra-animal control. The rats were randomly assigned to a diet supplemented with Vitamin E and Vitamin C or normal non-supplemented rat chow. Biomarkers of oxidative stress were measured in the tibialis anterior muscle. Repetitive loading exercise increased maximal isometric force, negative work and positive work in the dorsiflexors of young adult rats. Only positive work increased in the aged animals that were supplemented with Vitamin E and C. Markers of oxidative stress (H(2)O(2), total GSH, GSH/GSSG ratio, malondialdehyde and 8-OHdG) increased in the tibialis anterior muscles from aged and young adult animals with repetitive loading, but Vitamin E and C supplements attenuated this increase. MnSOD activity increased with supplementation in the young adult animals. CuZnSOD and catalase activity increased with supplementation in young adult and aged animals and GPx activity increased with exercise in the non-supplemented young adult and aged animals. The increased levels of endogenous antioxidant enzymes after Vitamin E and C supplementation appear to be regulated by post-transcriptional modifications that are affected differently by age, exercise, and supplementation. These data suggest that antioxidant supplementation improves indices of oxidative stress associated with repetitive loading exercise and aging and improves the positive work output of muscles in aged rodents.

Indexed as

AgingAnimalsAntioxidantsAscorbic AcidDNA DamageGlutathioneGlutathione DisulfideHydrogen PeroxideIsometric ContractionLipid PeroxidationMaleMuscle, SkeletalOrgan SizeOxidative StressOxidoreductasesPhysical ExertionAntioxidantsAscorbic AcidGlutathioneGlutathione DisulfideHydrogen PeroxideOxidoreductasesRNA, MessengerVitamin E

Identifiers

PMID20705127
PMCPMC3104015
OpenAlexW2042299953

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.