Evidence map›Paper›PMID 25576628›Full record

ArticleAmerican journal of physiology. Heart and circulatory physiology2015

Brain-derived neurotrophic factor modulates angiotensin signaling in the hypothalamus to increase blood pressure in rats.

Benedek Erdos, Iara Backes, Michael L McCowan, Linda F Hayward, Deborah A Scheuer

Abstract read
In one paragraph

Article in American journal of physiology. Heart and circulatory physiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

32 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  7. Associations of Plasma BDNF andJournal of nutrition and metabolism · 2023
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  15. Obesity-induced sympathoexcitation is associated with Nrf2 dysfunction in the rostral ventrolateral medulla.American journal of physiology. Regulatory, integrative and comparative physiology · 2020
    Article
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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

5 authors.

Benedek ErdosDepartment of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, Florida; Department of Pharmacology, University of Vermont College of Medicine, Burlington, Vermont; and berdos@uvm.edu.ORCID http://orcid.org/0000-0002-9074-2491
Iara BackesDepartment of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, Florida;
Michael L McCowanDepartment of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, Florida;
Linda F HaywardDepartment of Physiological Sciences, University of Florida, Gainesville, Florida.
Deborah A ScheuerDepartment of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, Florida;

Funding

Glucocorticoids, Stress and Blood Pressure RegulationR01HL076807 · NHLBI · UNIVERSITY OF MISSOURI KANSAS CITY · PI SCHEUER, DEBORAH A · 2004 to 2014
$2.4M
Paraventricular nucleus regulatory mechanisms in stress and hypertensionR01HL093186 · NHLBI · UNIVERSITY OF FLORIDA · PI SCHEUER, DEBORAH A, SUMNERS, COLIN · 2009 to 2013
$2.0M
NHLBI NIH HHS HL-76807NHLBI NIH HHS HL-93186
6 · The paper itself

Abstract

Brain-derived neurotrophic factor (BDNF) expression increases in the paraventricular nucleus of the hypothalamus (PVN) in response to hypertensive stimuli including stress and hyperosmolarity. However, it is unclear whether BDNF in the PVN contributes to increases in blood pressure (BP). We tested the hypothesis that increased BDNF levels within the PVN would elevate baseline BP and heart rate (HR) and cardiovascular stress responses by altering central angiotensin signaling. BP was recorded using radiotelemetry in male Sprague-Dawley rats after bilateral PVN injections of adeno-associated viral vectors expressing green fluorescent protein (GFP) or myc epitope-tagged BDNF fusion protein. Cardiovascular responses to acute stress were evaluated 3 to 4 wk after injections. Additional GFP and BDNF-treated animals were equipped with osmotic pumps for intracerebroventricular infusion of saline or the angiotensin type-1 receptor (AT1R) inhibitor losartan (15 μg·0.5 μl(-1)·h(-1)). BDNF treatment significantly increased baseline BP (121 ± 3 mmHg vs. 99 ± 2 mmHg in GFP), HR (394 ± 9 beats/min vs. 314 ± 4 beats/min in GFP), and sympathetic tone indicated by HR- and BP-variability analysis and adrenomedullary tyrosine hydroxylase protein expression. In contrast, body weight and BP elevations to acute stressors decreased. BDNF upregulated AT1R mRNA by ∼80% and downregulated Mas receptor mRNA by ∼50% in the PVN, and losartan infusion partially inhibited weight loss and increases in BP and HR in BDNF-treated animals without any effect in GFP rats. Our results demonstrate that BDNF overexpression in the PVN results in sympathoexcitation, BP and HR elevations, and weight loss that are mediated, at least in part, by modulating angiotensin signaling in the PVN.

Indexed as

Blood PressureRenin-Angiotensin SystemSignal TransductionAdrenal MedullaAngiotensin II Type 1 Receptor BlockersAngiotensinsAnimalsBody WeightBrain-Derived Neurotrophic FactorCardiovascular SystemDependovirusGenetic VectorsGene Transfer TechniquesHeart RateHypertensionInfusions, IntraventricularAngiotensin II Type 1 Receptor BlockersAngiotensinsBrain-Derived Neurotrophic FactorProto-Oncogene MasProto-Oncogene ProteinsReceptor, Angiotensin, Type 1Receptors, G-Protein-CoupledTyrosine 3-Monooxygenaseangiotensinblood pressurebody weightbrain-derived neurotrophic factorstress

Identifiers

PMID25576628
PMCPMC4360054

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.