Evidence map›Paper›PMID 24324037›Full record

ArticleHypertension (Dallas, Tex. : 1979)2014

Ang II-salt hypertension depends on neuronal activity in the hypothalamic paraventricular nucleus but not on local actions of tumor necrosis factor-α.

Megan E Bardgett, Walter W Holbein, Myrna Herrera-Rosales, Glenn M Toney

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Hypertension (Dallas, Tex. : 1979), 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
2.0field-weighted citation impact, top 15% 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

35 citing papers in PubMed, 43 citations in OpenAlex.

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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.

Megan E BardgettDepartment of Physiology, MC7756, University of Texas Health Science Center-San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229. bardgett@uthscsa.edu.
Walter W Holbein
Myrna Herrera-Rosales
Glenn M Toney
The University of Texas Health Science Center at San Antonio · US

Funding

Neurohumoral Adaptations to Chronic Intermittent Hypoxia: Insights into the Pathophysiology of Sleep ApneaP01HL088052 · NHLBI · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI TONEY, GLENN M · 2008 to 2019
$18.8M
PATHOBIOLOGY OF OCCLUSIVE VASCULAR DISEASET32HL007446 · NHLBI · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI Jean Chrisostome Bopassa · 1985 to 2026
$8.9M
AngII-Salt Hypertension Increases Respiratory-Vasomotor Neuron Coupling in RVLMR01HL102310 · NHLBI · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI TONEY, GLENN M · 2010 to 2013
$2.0M
NHLBI NIH HHS P01 HL088052NHLBI NIH HHS R01 HL102310NHLBI NIH HHS T32 HL007446NHLBI NIH HHS T32 HL07446
6 · The paper itself

Abstract

Development of angiotensin II (Ang II)-dependent hypertension involves microglial activation and proinflammatory cytokine actions in the hypothalamic paraventricular nucleus (PVN). Cytokines activate receptor signaling pathways that can both acutely grade neuronal discharge and trigger long-term adaptive changes that modulate neuronal excitability through gene transcription. Here, we investigated contributions of PVN cytokines to maintenance of hypertension induced by subcutaneous infusion of Ang II (150 ng/kg per min) for 14 days in rats consuming a 2% NaCl diet. Results indicate that bilateral PVN inhibition with the GABA-A receptor agonist muscimol (100 pmol/50 nL) caused significantly greater reductions of renal and splanchnic sympathetic nerve activity (SNA) and mean arterial pressure in hypertensive than in normotensive rats (P<0.01). Thus, ongoing PVN neuronal activity seems required for support of hypertension. Next, the role of the prototypical cytokine tumor necrosis factor-α was investigated. Whereas PVN injection of tumor necrosis factor-α (0.3 pmol/50 nL) acutely increased lumbar and splanchnic SNA and mean arterial pressure, interfering with endogenous tumor necrosis factor-α by injection of etanercept (10 μg/50 nL) was without effect in hypertensive and normotensive rats. Next, we determined that although microglial activation in PVN was increased in hypertensive rats, bilateral injections of minocycline (0.5 μg/50 nL), an inhibitor of microglial activation, failed to reduce lumbar or splanchnic SNA or mean arterial pressure in hypertensive or in normotensive rats. Collectively, these findings indicate that established Ang II-salt hypertension is supported by PVN neuronal activity, but short term maintenance of SNA and arterial blood pressure does not depend on ongoing local actions of tumor necrosis factor-α.

Indexed as

Blood PressureAngiotensin IIAnimalsDisease Models, AnimalGABA-A Receptor AgonistsHypertensionMaleMuscimolParaventricular Hypothalamic NucleusRatsRats, Sprague-DawleySodium Chloride, DietaryTumor Necrosis Factor-alphaAngiotensin IIGABA-A Receptor AgonistsMuscimolSodium Chloride, DietaryTumor Necrosis Factor-alphablood pressurecytokinesinflammation

Identifiers

PMID24324037
PMCPMC3945171
OpenAlexW2146118990

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.