Evidence map›Paper›PMID 19261912›Full record

ArticleAmerican journal of physiology. Regulatory, integrative and comparative physiology2009

Baroreflex sensitivity varies during the rat estrous cycle: role of gonadal steroids.

Robert K Goldman, Afaf S Azar, Julia M Mulvaney, Carmen Hinojosa-Laborde, Joseph R Haywood, Virginia L Brooks

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Regulatory, integrative and comparative physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
1.5field-weighted citation impact, top 21% 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

24 citing papers in PubMed, 52 citations in OpenAlex.

  1. Article
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  5. Sex Differences and Caffeine Impact in Adenosine-Induced Hyperemia.Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2022
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  7. Preserved glycemic control and baroreflex efficacy in young adult hypertensive female obese Zucker rats.American journal of physiology. Regulatory, integrative and comparative physiology · 2021
    Article
  8. Article
  9. Obesity: sex and sympathetics.Biology of sex differences · 2020
    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

6 authors at 3 institutions in 2 countries.

Robert K GoldmanPortland Veteran Affairs Medical Center, Department of Surgery, Portland, Oregon, USA.
Afaf S Azar
Julia M Mulvaney
Carmen Hinojosa-Laborde
Joseph R Haywood
Virginia L Brooks
Oregon Health & Science University · USInstitute of Pharmacology · CZThe University of Texas Health Science Center at San Antonio · US

Funding

NHLBI NIH HHS HL-03153
6 · The paper itself

Abstract

Baroreflex sensitivity (BRS) increases in women during the luteal phase of the menstrual cycle, when gonadal hormones are elevated, but whether a similar cycle-dependent variation in BRS occurs in rats is unknown. In addition, whether cyclic BRS changes depend on gonadal steroids has not been previously investigated. To test these hypotheses, BRS was determined in cycling female rats using two approaches: 1) baroreflex control of renal sympathetic nerve activity (RSNA) in anesthetized rats; 2) cardiovagal spontaneous BRS (sBRS) in conscious rats instrumented for continuous telemetric measurements of mean arterial pressure (MAP) and heart rate (HR). MAP, HR, and sBRS were also measured in rats 2-3 and 5-6 wk following ovariectomy (OVX), to eliminate gonadal steroids. In anesthetized rats, RSNA BRS gain was increased (P < 0.01) during proestrus (-4.8+/-0.5% control/mmHg) compared with diestrus/estrus (-2.8 +/- 0.3% control/mmHg). Similarly, a proestrous peak in sBRS was observed in conscious rats (1.66 +/- 0.07 ms/mmHg, proestrus; 1.48 +/- 0.06 ms/mmHg, diestrus/estrus; P < 0.001). OVX eliminated estrous cycle-induced variation in sBRS. In addition, OVX reduced (P < 0.05) diurnal variations in MAP (5.9 +/- 0.3 vs. 3.9 +/- 0.5 mmHg) and HR [54 +/- 4 vs. 39 +/- 3 beats per minute (bpm)], and abolished diurnal variations in sBRS. Finally, while MAP, HR, and sBRS were decreased 2-3 wk following OVX, approximately 3 wk later, MAP and sBRS increased, and HR decreased further. No changes in MAP, HR, or sBRS were seen with time in sham OVX controls. In summary, RSNA and cardiovagal sBRS vary during the rat estrous cycle, and this variation is abolished by OVX. We conclude that sex steroid hormones are required for both cyclic and diurnal changes in BRS in rats.

Indexed as

AnimalsBaroreflexBlood PressureEstradiolEstrous CycleFemaleGonadal Steroid HormonesHeart RateModels, AnimalOrgan SizeOvariectomyOvaryRatsRats, Sprague-DawleySympathetic Nervous SystemTime FactorsEstradiolGonadal Steroid Hormones

Identifiers

PMID19261912
PMCPMC2689823
OpenAlexW2109255275

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.