Evidence map›Paper›PMID 25774285›Full record

ArticleBiology of sex differences2014

Pressor responsiveness to angiotensin II in female mice is enhanced with age: role of the angiotensin type 2 receptor.

Katrina M Mirabito, Lucinda M Hilliard, Geoffrey A Head, Robert E Widdop, Kate M Denton

Open access · goldAbstract read
In one paragraph

Article in Biology of sex differences, 2014. 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
2.6field-weighted citation impact, top 9% 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, 41 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

5 authors at 2 institutions in 1 country.

Katrina M MirabitoDepartment of Physiology, Monash University, Building 13F, Victoria 3800, Australia.
Lucinda M HilliardDepartment of Physiology, Monash University, Building 13F, Victoria 3800, Australia.
Geoffrey A HeadBaker IDI Heart and Diabetes Institute, Melbourne 3004, Victoria, Australia.
Robert E WiddopDepartment of Pharmacology, Monash University, Building 13E, Victoria 3800, Australia.
Kate M DentonDepartment of Physiology, Monash University, Building 13F, Victoria 3800, Australia.
Monash University · AUBaker Heart and Diabetes Institute · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe pressor response to angiotensin II (AngII) is attenuated in adult females as compared to males via an angiotensin type 2 receptor (AT2R)-dependent pathway. We hypothesized that adult female mice are protected against AngII-induced hypertension via an enhanced AT2R-mediated pathway and that in reproductively senescent females this pathway is no longer operative.

methodsMean arterial pressure was measured via telemetry in 4-month-old (adult) and 16-month-old (aged) and aged ovariectomized (aged-OVX) wild-type and AT2R knockout (AT2R-KO) female mice during baseline and 14-day infusion of vehicle (saline) or AngII (600 ng/kg/min s.c.). Real-time reverse transcription polymerase chain reaction (RT-PCR) was used to determine renal gene expression of angiotensin receptors and angiotensin-converting enzyme 2 in response to 14-day treatment with vehicle or AngII.

resultsBasal mean arterial pressure was similar between the groups. The pressor response to AngII was augmented in adult AT2R-KO compared to adult wild-type mice (29 ± 3 mmHg versus 10 ± 4 mmHg, respectively, on day 14 as compared to basal mean arterial pressure, P = 0.002). In wild-type mice, pressor responsiveness to AngII was augmented with age, such that the pressor response to AngII was similar between aged AT2R-KO and wild-type female mice (31 ± 4 mmHg versus 34 ± 3 mmHg, respectively, on day 14, P = 0.9). There were no significant differences in pressor responsiveness to AngII between aged and aged-OVX mice. Vehicle-treated aged wild-type mice had a lower renal AT2R/AT1R balance as compared to adult counterparts. In response to AngII, the renal AT2R/AT1R balance in aged wild-type females was greater than that observed in vehicle-treated aged wild-type females and adult wild-type females, yet the protective effects of AT2R activation were not restored.

conclusionsThe protective role of the AT2R depressor pathway is lost with age in female mice. Therefore, targeting deficits in AT2R expression and/or signaling may represent a novel anti-hypertensive approach in aged females.

Indexed as

AgingAngiotensin type 2 receptorFemalesHypertensionRenin angiotensin system

Identifiers

PMID25774285
PMCPMC4358320
OpenAlexW2124484658

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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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.