Evidence map›Paper›PMID 21677265›Full record

ReviewAmerican journal of physiology. Regulatory, integrative and comparative physiology2011

Adenosine A₂a receptors and O₂ sensing in development.

Brian J Koos

Abstract readReview
In one paragraph

Review in American journal of physiology. Regulatory, integrative and comparative physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
1.4field-weighted citation impact, top 23% 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

20 citing papers in PubMed, 40 citations in OpenAlex.

  1. Review
  2. Review
  3. Fetal Cerebral Blood Flow (Dys)autoregulation.Diagnostics (Basel, Switzerland) · 2025
    Review
  4. Review
  5. Sex Differences and Caffeine Impact in Adenosine-Induced Hyperemia.Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2022
    Article
  6. Review
  7. Review
  8. Perinatal Hypoxemia and Oxygen Sensing.Comprehensive Physiology · 2021
    Article
  9. Article
  10. Article
  11. Article
  12. Loss ofeLife · 2018
    Article
  13. Article
  14. Review
  15. Thalamic mediation of hypoxic respiratory depression in lambs.American journal of physiology. Regulatory, integrative and comparative physiology · 2016
    Article
  16. Review
  17. Review
  18. Article
  19. Carotid chemoreceptor "resetting" revisited.Respiratory physiology & neurobiology · 2013
    Review
  20. Review
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

1 author at 1 institution in 1 country.

Brian J KoosDepartment of Obstetrics and Gynecology; Brain Research Institute, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, USA. bkoos@mednet.ucla.edu
University of California, Los Angeles · US

Funding

HYPOXIA AND THE CONTROL OF FETAL BREATHING MOVEMENTSR01HD018478 · NICHD · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI KOOS, BRIAN J. · 1985 to 2010
$2.8M
NICHD NIH HHS HD-18478
6 · The paper itself

Abstract

Reduced mitochondrial oxidative phosphorylation, via activation of adenylate kinase and the resulting exponential rise in the cellular AMP/ATP ratio, appears to be a critical factor underlying O₂ sensing in many chemoreceptive tissues in mammals. The elevated AMP/ATP ratio, in turn, activates key enzymes that are involved in physiologic adjustments that tend to balance ATP supply and demand. An example is the conversion of AMP to adenosine via 5'-nucleotidase and the resulting activation of adenosine A(₂A) receptors, which are involved in acute oxygen sensing by both carotid bodies and the brain. In fetal sheep, A(₂A) receptors associated with carotid bodies trigger hypoxic cardiovascular chemoreflexes, while central A(₂A) receptors mediate hypoxic inhibition of breathing and rapid eye movements. A(₂A) receptors are also involved in hypoxic regulation of fetal endocrine systems, metabolism, and vascular tone. In developing lambs, A(₂A) receptors play virtually no role in O₂ sensing by the carotid bodies, but brain A(₂A) receptors remain critically involved in the roll-off ventilatory response to hypoxia. In adult mammals, A(₂A) receptors have been implicated in O₂ sensing by carotid glomus cells, while central A(₂A) receptors likely blunt hypoxic hyperventilation. In conclusion, A(₂A) receptors are crucially involved in the transduction mechanisms of O₂ sensing in fetal carotid bodies and brains. Postnatally, central A(₂A) receptors remain key mediators of hypoxic respiratory depression, but they are less critical for O₂ sensing in carotid chemoreceptors, particularly in developing lambs.

Indexed as

Signal TransductionAdaptation, PhysiologicalAdenosineAnimalsBrainCarotid BodyChemoreceptor CellsEnergy MetabolismEye MovementsHomeostasisHumansHypoxiaOxygenPulmonary VentilationReceptors, Adenosine A2ReflexAdenosineOxygenReceptors, Adenosine A2

Identifiers

PMID21677265
PMCPMC3174752
OpenAlexW2014994291

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.