Evidence map›Paper›PMID 23028531›Full record

ArticlePloS one2012

Effects of fiber type and size on the heterogeneity of oxygen distribution in exercising skeletal muscle.

Gang Liu, Feilim Mac Gabhann, Aleksander S Popel

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
7.9field-weighted citation impact, top 4% 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

26 citing papers in PubMed, 52 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. Article
  17. Sarcopenia: Aging-Related Loss of Muscle Mass and Function.Physiological reviews · 2019 · on this map
    Review
  18. Review
  19. Image-based modelling of skeletal muscle oxygenation.Journal of the Royal Society, Interface · 2017
    Review
  20. The capillary bed offers the largest hemodynamic resistance to the cortical blood supply.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2017
    Article
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

3 authors at 1 institution in 1 country.

Gang LiuSystems Biology Laboratory, Department of Biomedical Engineering, School of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America. gangliu2001@gmail.com
Feilim Mac Gabhann
Aleksander S Popel
Johns Hopkins University · US

Funding

Systems Biology of Angiogenesis in Peripheral Arterial DiseaseR01HL101200 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI POPEL, ALEKSANDER S. · 2010 to 2022
$10.7M
VASODILATION AND MICROVASCULAR OXYGEN DELIVERYR01HL018292 · NHLBI · VIRGINIA COMMONWEALTH UNIVERSITY · PI PITTMAN, ROLAND N · 1985 to 2011
$4.4M
Endothelial cell decisions integrate soluble and matrix-bound VEGF gradientsR00HL093219 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI MAC GABHANN, FEILIM C · 2009 to 2011
$746k
NHLBI NIH HHS HL101200NHLBI NIH HHS R00 HL093219NHLBI NIH HHS R01 HL018292NHLBI NIH HHS R01 HL101200NHLBI NIH HHS R01 HL18292
6 · The paper itself

Abstract

The process of oxygen delivery from capillary to muscle fiber is essential for a tissue with variable oxygen demand, such as skeletal muscle. Oxygen distribution in exercising skeletal muscle is regulated by convective oxygen transport in the blood vessels, oxygen diffusion and consumption in the tissue. Spatial heterogeneities in oxygen supply, such as microvascular architecture and hemodynamic variables, had been observed experimentally and their marked effects on oxygen exchange had been confirmed using mathematical models. In this study, we investigate the effects of heterogeneities in oxygen demand on tissue oxygenation distribution using a multiscale oxygen transport model. Muscles are composed of different ratios of the various fiber types. Each fiber type has characteristic values of several parameters, including fiber size, oxygen consumption, myoglobin concentration, and oxygen diffusivity. Using experimentally measured parameters for different fiber types and applying them to the rat extensor digitorum longus muscle, we evaluated the effects of heterogeneous fiber size and fiber type properties on the oxygen distribution profile. Our simulation results suggest a marked increase in spatial heterogeneity of oxygen due to fiber size distribution in a mixed muscle. Our simulations also suggest that the combined effects of fiber type properties, except size, do not contribute significantly to the tissue oxygen spatial heterogeneity. However, the incorporation of the difference in oxygen consumption rates of different fiber types alone causes higher oxygen heterogeneity compared to control cases with uniform fiber properties. In contrast, incorporating variation in other fiber type-specific properties, such as myoglobin concentration, causes little change in spatial tissue oxygenation profiles.

Indexed as

HumansModels, TheoreticalMuscle Fibers, SkeletalMuscle, SkeletalMyoglobinOxygenOxygen ConsumptionMyoglobinOxygen

Identifiers

PMID23028531
PMCPMC3445540
OpenAlexW2071492852

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.