Evidence map›Paper›PMID 19948661›Full record

ArticleThe Journal of physiology2010

Nitric oxide contributes to the augmented vasodilatation during hypoxic exercise.

Darren P Casey, Brandon D Madery, Timothy B Curry, John H Eisenach, Brad W Wilkins, Michael J Joyner

Open access · greenAbstract read
In one paragraph

Article in The Journal of physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 2 pooled it
7.1field-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

76 citing papers in PubMed, 2 syntheses or guidelines pooled it, 138 citations in OpenAlex.

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  15. Vasoconstrictor responsiveness during hyperbaric hyperoxia in contracting human muscle.Journal of applied physiology (Bethesda, Md. : 1985) · 2013
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16 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Darren P CaseyDepartment of Anesthesiology, Mayo Clinic, Rochester, MN 55905, USA. casey.darren@mayo.edu
Brandon D Madery
Timothy B Curry
John H Eisenach
Brad W Wilkins
Michael J Joyner
Mayo Clinic in Arizona · USMayo Clinic in Florida · USNike (United States) · US

Funding

MAYO CLINIC CENTER FOR TRANSLATIONAL SCIENCE ACTIVITIESUL1RR024150 · NCRR · MAYO CLINIC ROCHESTER · PI RIZZA, ROBERT A. · 2006 to 2011
$66.4M
PERFUSION OF ACTIVE MUSCLES--METABOLITES AND NERVESR01HL046493 · NHLBI · MAYO CLINIC ROCHESTER · PI JOYNER, MICHAEL J · 1997 to 2011
$3.7M
Role of Adenosine in Compensatory Dilation During Hypoxic ExerciseF32AR055819 · NIAMS · MAYO CLINIC ROCHESTER · PI CASEY, DARREN PATRICK · 2008 to 2010
$149k
PERFUSION OF ACTIVE MUSCLES: METABOLITES AND NERVESR29HL046493 · NHLBI · MAYO CLINIC COLL OF MEDICINE, ROCHESTER · PI JOYNER, MICHAEL J · 1992 to 1996
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NCRR NIH HHS RR-024150NCRR NIH HHS UL1 RR024150NHLBI NIH HHS HL-46493NHLBI NIH HHS R01 HL046493NIAMS NIH HHS AR-55819NIAMS NIH HHS F32 AR055819
6 · The paper itself

Abstract

We tested the hypotheses that (1) nitric oxide (NO) contributes to augmented skeletal muscle vasodilatation during hypoxic exercise and (2) the combined inhibition of NO production and adenosine receptor activation would attenuate the augmented vasodilatation during hypoxic exercise more than NO inhibition alone. In separate protocols subjects performed forearm exercise (10% and 20% of maximum) during normoxia and normocapnic hypoxia (80% arterial O(2) saturation). In protocol 1 (n = 12), subjects received intra-arterial administration of saline (control) and the NO synthase inhibitor N(G)-monomethyl-L-arginine (L-NMMA). In protocol 2 (n = 10), subjects received intra-arterial saline (control) and combined L-NMMA-aminophylline (adenosine receptor antagonist) administration. Forearm vascular conductance (FVC; ml min(-1) (100 mmHg)(-1)) was calculated from forearm blood flow (ml min(-1)) and blood pressure (mmHg). In protocol 1, the change in FVC (Delta from normoxic baseline) due to hypoxia under resting conditions and during hypoxic exercise was substantially lower with L-NMMA administration compared to saline (control; P < 0.01). In protocol 2, administration of combined L-NMMA-aminophylline reduced the DeltaFVC due to hypoxic exercise compared to saline (control; P < 0.01). However, the relative reduction in DeltaFVC compared to the respective control (saline) conditions was similar between L-NMMA only (protocol 1) and combined L-NMMA-aminophylline (protocol 2) at 10% (-17.5 +/- 3.7 vs. -21.4 +/- 5.2%; P = 0.28) and 20% (-13.4 +/- 3.5 vs. -18.8 +/- 4.5%; P = 0.18) hypoxic exercise. These findings suggest that NO contributes to the augmented vasodilatation observed during hypoxic exercise independent of adenosine.

Indexed as

AdultAminophyllineAnalysis of VarianceBlood PressureCardiotonic AgentsEnzyme InhibitorsExerciseFemaleForearmHumansHypoxiaMaleMuscle, SkeletalNitric Oxideomega-N-MethylarginineRegional Blood FlowAminophyllineCardiotonic AgentsEnzyme InhibitorsNitric Oxideomega-N-Methylarginine

Identifiers

PMID19948661
PMCPMC2821731
OpenAlexW1954013673

What OpenQuestion holds

Textmetadata
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.