Evidence map›Paper›PMID 21859962›Full record

ArticleHypertension (Dallas, Tex. : 1979)2011

Superoxide modulates myogenic contractions of mouse afferent arterioles.

En Yin Lai, Anton Wellstein, William J Welch, Christopher S Wilcox

Open access · bronzeAbstract read
In one paragraph

Article in Hypertension (Dallas, Tex. : 1979), 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
3.3field-weighted citation impact, top 8% 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

40 citing papers in PubMed, 51 citations in OpenAlex.

  1. Article
  2. LRRC8A anion channels modulate vascular reactivity via association with myosin phosphatase rho interacting protein.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2023
    Article
  3. Oxidative Regulation of Vascular CaAntioxidants (Basel, Switzerland) · 2022
    Review
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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

4 authors at 1 institution in 1 country.

En Yin LaiDivision of Nephrology and Hypertension, Georgetown University, Washington, DC 20007, USA.
Anton Wellstein
William J Welch
Christopher S Wilcox
Georgetown University · US

Funding

Renal Vascular Oxidative Stress in HypertensionP01HL068686 · NHLBI · GEORGETOWN UNIVERSITY · PI JOSE, PEDRO A., SANDBERG, KATHRYN L · 2001 to 2017
$28.8M
REGULATION OF RENAL FUNCTION AND BP BY THROMBOXANER37DK036079 · NIDDK · GEORGETOWN UNIVERSITY · PI WILCOX, CHRISTOPHER S · 2003 to 2012
$5.2M
NITRIC OXIDE SYNTHASE IN THE JUXTAGLOMERULAR APPARATUSR01DK049870 · NIDDK · GEORGETOWN UNIVERSITY · PI WILCOX, CHRISTOPHER S · 1994 to 2014
$4.6M
OXIDATIVE STRESS AND KIDNEY OXYGEN USAGER01HL089583 · NHLBI · GEORGETOWN UNIVERSITY · PI WELCH, WILLIAM J · 2008 to 2012
$1.9M
REGULATION OF RENAL FUNCTION AND BP BY THROMBOXANER01DK036079 · NIDDK · UNIVERSITY OF FLORIDA · PI WILCOX, CHRISTOPHER S · 1986 to 2002
$830k
NHLBI NIH HHS HL-089583NHLBI NIH HHS HL-68686NHLBI NIH HHS P01 HL068686NHLBI NIH HHS R01 HL089583NIDDK NIH HHS DK-036079NIDDK NIH HHS DK-049870NIDDK NIH HHS R01 DK036079NIDDK NIH HHS R01 DK049870NIDDK NIH HHS R37 DK036079
6 · The paper itself

Abstract

Reactive oxygen species enhance or impair autoregulation. Because superoxide is a vasoconstrictor, we tested the hypothesis that stretch generates superoxide that mediates myogenic responses. Increasing perfusion pressure of mouse isolated perfused renal afferent arterioles from 40 to 80 mm Hg reduced their diameter by 13.3±1.8% (P<0.001) and increased reactive oxygen species (ethidium: dihydroethidium fluorescence) by 9.8±2.3% (P<0.05). Stretch-induced fluorescence was reduced significantly (P<0.05) by incubation with Tempol (3.7±0.8%), pegylated superoxide dismutase (3.2±1.0%), or apocynin (3.5±0.9%) but not by pegylated catalase, L-nitroarginine methylester, or Ca(2+)-free medium, relating it to Ca(2+)-independent vascular superoxide. Compared with vehicle, basal tone and myogenic contractions were reduced significantly (P<0.05) by pegylated superoxide dismutase (5.4±0.8), Tempol (4.1±1.0%), apocynin (1.0±1.3%), and diphenyleneiodinium (3.9±0.9%) but not by pegylated catalase (10.1±1.6%). L-Nitroarginine methylester enhanced basal tone, but neither it (15.8±3.3%) nor endothelial NO synthase knockout (10.2±1.8%) significantly changed myogenic contractions. Tempol had no further effect after superoxide dismutase but remained effective after catalase. H(2)O(2) >50 μmol/L caused contractions but at 25 μmol/L inhibited myogenic responses (7.4±0.8%; P<0.01). In conclusion, increasing the pressure within afferent arterioles led to Ca(2+)-independent increased vascular superoxide production from nicotinamide adenine dinucleotide phosphate oxidase, which enhanced myogenic contractions largely independent of NO, whereas H(2)O(2) impaired pressure-induced contractions but was not implicated in the normal myogenic response.

Indexed as

AcetophenonesAnimalsAntioxidantsArteriolesCyclic N-OxidesEnzyme InhibitorsKidneyMaleMiceMice, Inbred C57BLMice, KnockoutModels, AnimalMuscle ContractionMuscle, Smooth, VascularNG-Nitroarginine Methyl EsterNitric OxideAcetophenonesacetovanilloneAntioxidantsCyclic N-OxidesEnzyme InhibitorsNG-Nitroarginine Methyl EsterNitric OxideNitric Oxide SynthaseNitric Oxide Synthase Type IIINos3 protein, mouseReactive Oxygen SpeciesSpin LabelsSuperoxide DismutaseSuperoxidestempol

Identifiers

PMID21859962
PMCPMC3190586
OpenAlexW2103128950

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.