Evidence map›Paper›PMID 18670418›Full record

ArticleAmerican journal of hypertension2008

Role of reactive oxygen species in hypertension produced by reduced uterine perfusion in pregnant rats.

Mona Sedeek, Jeffrey S Gilbert, Babbette B LaMarca, Myssara Sholook, Derrick L Chandler, Yuping Wang, Joey P Granger

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in American journal of hypertension, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed, 1 pooled it
7.0field-weighted citation impact, top 3% 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

84 citing papers in PubMed, 1 synthesis or guideline pooled it, 133 citations in OpenAlex.

  1. Pooled it
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  12. NLRP3 inhibition improves maternal hypertension, inflammation, and vascular dysfunction in response to placental ischemia.American journal of physiology. Regulatory, integrative and comparative physiology · 2023
    Article
  13. Oxidative Regulation of Vascular CaAntioxidants (Basel, Switzerland) · 2022
    Review
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24 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

7 authors at 2 institutions in 2 countries.

Mona SedeekDepartment of Physiology and the Center for Excellence in Cardiovascular-Renal Research, University of Mississippi Medical Center, Jackson, Mississippi, USA.
Jeffrey S Gilbert
Babbette B LaMarca
Myssara Sholook
Derrick L Chandler
Yuping Wang
Joey P Granger
University of Mississippi Medical Center · USLouisiana State University Health Sciences Center Shreveport · US

Funding

STRUCTURAL VASCULAR ADAPTATION OF THE MICROCIRCULATIONP01HL051971 · NHLBI · UNIVERSITY OF MISSISSIPPI MEDICAL CENTER · PI HALL, JOHN E · 1993 to 2018
$39.4M
ABNORMAL PRESSURE NATRIURESIS IN HYPERTENSIONR01HL038499 · NHLBI · UNIVERSITY OF MISSISSIPPI MEDICAL CENTER · PI GRANGER, JOEY P. · 1989 to 2009
$1.4M
Renal and Cardiovascular Dysfunction in Hypertension and PregnancyF32HL090269 · NHLBI · UNIVERSITY OF MISSISSIPPI MED CTR · PI GILBERT, JEFFREY S · 2007 to 2007
$44k
ABNORMAL PRESSURE NATRIURESIS IN HYPERTENSIONR23HL038499 · NHLBI · EASTERN VIRGINIA MEDICAL SCHOOL · PI GRANGER, JOEY P. · 1986 to 1987
–
NHLBI NIH HHS F32 HL090269NHLBI NIH HHS HL-38499NHLBI NIH HHS P01 HL051971NHLBI NIH HHS R01 HL038499PHS HHS L-51971
6 · The paper itself

Abstract

backgroundAlthough recent studies indicate preeclampsia (PE) is associated with increased oxidative stress, the role of reactive oxygen species in the hypertension associated with PE remains unclear. We sought to test the hypothesis that placental ischemia increases oxidative stress which in turn, contributes to hypertension.

methodsReduction in uterine perfusion pressure (RUPP) was induced by placing silver clips on the abdominal aorta and the ovarian arteries on day 14 of pregnancy. On day 20 of pregnancy, mean arterial pressure (MAP) was measured and oxidative stress was assessed in renal and placental tissues whereas systemic administration of tempol, a superoxide dismutase (SOD) mimetic, was used to evaluate the contribution of reactive oxygen species on RUPP-induced hypertension.

resultsMAP (120 +/- 2 mm Hg vs.106 +/- 3 mm Hg), placental levels of 8-isoprostane (1.9 +/- 0.4 ng/g tissue vs. 0.8 +/- 0.1 ng/g tissue), and malondialdehyde (MDA) (6.9 +/- 0.6 micromol/g tissue vs. 3.9 +/- 0.4 micromol/g tissue) were increased, whereas renal cortical SOD activity was decreased in RUPP rats (1.2 +/- 0.1 units/mg protein vs. 1.6 +/- 0.1 units/mg protein) at day 20 of gestation (20 dG) compared to controls. Chronic treatment with tempol attenuated the hypertension (RUPP + tempol 112 +/- 2 mm Hg vs. RUPP, 120 +/- 2 mm Hg) associated with RUPP, whereas tempol had no effect on MAP (NP, 106 +/- 3 vs. NP + tempol, 108 +/- 2) in control rats.

conclusionThe results of this study indicate that placental ischemia decreases innate antioxidant activity resulting in elevated oxidative stress which appears to play a role in mediating hypertension associated with chronic RUPP in pregnant rats.

Indexed as

AnimalsBlood PressureDisease Models, AnimalFemaleHypertensionIschemiaOxidative StressPlacentaPregnancyPregnancy Complications, CardiovascularRatsRats, Sprague-DawleyReactive Oxygen SpeciesUterusReactive Oxygen Species

Identifiers

PMID18670418
PMCPMC2786058
OpenAlexW1968794482

What OpenQuestion holds

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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.