Evidence map›Paper›PMID 31776883›Full record

ArticleGeroScience2020

Acclimation to a thermoneutral environment abolishes age-associated alterations in heart rate and heart rate variability in conscious, unrestrained mice.

Jessie E Axsom, Alay P Nanavati, Carolyn A Rutishauser, Janet E Bonin, Jack M Moen, Edward G Lakatta

Open access · hybridAbstract read
In one paragraph

Article in GeroScience, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
1.8field-weighted citation impact, top 13% 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

21 citing papers in PubMed, 28 citations in OpenAlex.

  1. Article
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  7. Cardiovascular function and autonomic regulation in urethane-anesthetized and conscious mice.American journal of physiology. Regulatory, integrative and comparative physiology · 2025
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  9. Review
  10. What to consider for ECG in mice-with special emphasis on telemetry.Mammalian genome : official journal of the International Mammalian Genome Society · 2023
    Review
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  17. Roles of cardiovascular autonomic regulation and sleep patterns in high blood pressure induced by mild cold exposure in rats.Hypertension research : official journal of the Japanese Society of Hypertension · 2021
    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

6 authors at 2 institutions in 1 country.

Jessie E AxsomIntramural Research Program, Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD, 21224, USA.ORCID http://orcid.org/0000-0002-8013-9576
Alay P NanavatiIntramural Research Program, Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD, 21224, USA.
Carolyn A RutishauserIntramural Research Program, Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD, 21224, USA.
Janet E BoninIntramural Research Program, Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD, 21224, USA.
Jack M MoenIntramural Research Program, Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD, 21224, USA.
Edward G LakattaIntramural Research Program, Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Suite 100, Baltimore, MD, 21224, USA. lakattae@mail.nih.gov.
National Institutes of Health · USUniversity of Maryland, Baltimore · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mice are among the most widely used translational models of cardiovascular aging and offer a method to quickly assess lifespan changes in a controlled environment. The standard laboratory temperature (20-22 °C), however, imposes a cold stress on mice that causes an increase in sympathetic nervous system-mediated activation of brown adipose tissue (BAT) to maintain a core body temperature of 36-37 °C. Thus, while physiologic data obtained recapitulate human physiology to a certain degree, interpretations of previous research in mice may have been contaminated by a cold stress, due to housing mice below their thermoneutral zone (30 °C). The purpose of this investigation was to examine how chronic sympathetic stimulation evoked by acclimation to 20 °C might obscure interpretation of changes in autonomic modulation of heart rate (HR) and heart rate variability (HRV) that accompany advancing age. HR and HRV before and after administration of a dual-autonomic blockade were measured via in-vivo ECG in young (3 months) and aged (30 months) male C57BL/6 telemetry-implanted mice following temperature acclimation for 3 days at 30 °C or 20 °C. Mean basal and intrinsic HR of both young and aged mice became markedly reduced at 30 °C compared to 20 °C. In both age groups, HRV parameters in time, frequency, and non-linear domains displayed increased variability at 30 °C compared to 20 °C under basal conditions. Importantly, age-associated declines in HRV observed at 20 °C were ameliorated when mice were studied at their thermoneutral ambient temperature of 30 °C. Thus, an accurate understanding of autonomic modulation of cardiovascular functions in mice of advanced age requires that they are housed in a metabolically neutral environment.

Indexed as

AcclimatizationAdipose Tissue, BrownAnimalsBody Temperature RegulationHeart RateMaleMiceMice, Inbred C57BLAgingCardiac autonomic modulationHeart rateHeart rate variabilityThermoneutrality

Identifiers

PMID31776883
PMCPMC7031176
OpenAlexW2990869740

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.