Evidence map›Paper›PMID 34418329›Full record

ArticleJournal of cachexia, sarcopenia and muscle2021

Determining the contributions of protein synthesis and breakdown to muscle atrophy requires non-steady-state equations.

Kamil A Kobak, Marcus M Lawrence, Gavin Pharaoh, Agnieszka K Borowik, Frederick F Peelor, Patrick D Shipman, Timothy M Griffin, Holly Van Remmen, Benjamin F Miller

Open access · goldAbstract read
In one paragraph

Article in Journal of cachexia, sarcopenia and muscle, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.5field-weighted citation impact, top 18% 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

23 citing papers in PubMed, 30 citations in OpenAlex.

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  20. Exercise and mitochondrial remodeling to prevent age-related neurodegeneration.Journal of applied physiology (Bethesda, Md. : 1985) · 2023
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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

9 authors at 3 institutions in 2 countries.

Kamil A KobakAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0003-1804-6333
Marcus M LawrenceAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0001-7106-574X
Gavin PharaohAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0001-7221-7346
Agnieszka K BorowikAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0002-2208-460X
Frederick F PeelorAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.
Patrick D ShipmanDepartment of Mathematics, Colorado State University, Fort Collins, CO, USA.
Timothy M GriffinAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0001-8840-9940
Holly Van RemmenAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0003-0883-0642
Benjamin F MillerAging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.ORCID 0000-0003-3283-0685
Oklahoma Medical Research Foundation · USColorado State University · USSouthern Utah University · US

Funding

Targeted DNA Methylation and Mitochondrial Heteroplasmy CoreP30AG050911 · NIA · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI Veronica Galvan · 2015 to 2026
$13.9M
GEROSCIENCE TRAINING PROGRAM IN OKLAHOMAT32AG052363 · NIA · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI Benjamin Francis Miller, William Edmund Sonntag · 2017 to 2026
$3.6M
A novel approach to understand a mechanism of proteostatic decline with agingR56AG067754 · NIA · OKLAHOMA MEDICAL RESEARCH FOUNDATION · PI MILLER, BENJAMIN FRANCIS · 2020 to 2020
$768k
BLR&D Research Career Scientist Award ApplicationIK6BX005234 · VA · OKLAHOMA CITY VA MEDICAL CENTER · PI VAN REMMEN, HOLLY · 2020 to 2024
–
BLRD VA I01 BX005592BLRD VA IK6 BX005234BLRD VA IK6 BX005238NIA NIH HHS AG052363NIA NIH HHS P30 AG050911NIA NIH HHS P30AG050911NIA NIH HHS R56 AG067754NIA NIH HHS R56AG067754NIA NIH HHS T32 AG052363VA IK6BX005234
6 · The paper itself

Abstract

backgroundAgeing and cachexia cause a loss of muscle mass over time, indicating that protein breakdown exceeds protein synthesis. Deuterium oxide (D

methodsAdult (6 months) male C57BL/6 mice (n = 14) were labelled with D

resultsGastrocnemius mass was less in denervated muscle (137 ± 9 mg) compared with sham (174 ± 15 mg; P < 0.0001) or nonsurgical control (162 ± 5 mg; P < 0.0001). With steady-state calculations, fractional synthesis and breakdown rates (FSR and FBR) were lower in the denervated muscle (1.49 ± 0.06%/day) compared with sham (1.81 ± 0.09%/day; P < 0.0001) or nonsurgical control (2.27 ± 0.04%/day; P < 0.0001). When adjusting for change in protein mass, FSR was 4.21 ± 0.19%/day in denervated limb, whereas FBR was 4.09 ± 0.22%/day. When considering change in protein mass (k

conclusionsWe show conflicting results between steady- and non-steady-state calculations on myofibrillar protein synthesis and breakdown during periods of muscle loss. We also found that collagen accumulation was largely from a decrease in collagen breakdown. Comparison between sham and non-surgical control demonstrated a crossover effect of denervation on myofibrillar protein synthesis and ribosomal biogenesis, which impacts study design for unilateral atrophy studies. These considerations are important because not accounting for them can mislead therapeutic attempts to maintain muscle mass.

Indexed as

Muscle DenervationMuscular AtrophyAnimalsMaleMiceMice, Inbred C57BLMuscle, SkeletalProtein BiosynthesisDenervationDeuterium oxideIsotope labellingMuscle atrophyProtein degradationProtein synthesis

Identifiers

PMID34418329
PMCPMC8718081
OpenAlexW3193756814

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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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.