Evidence map›Paper›PMID 21737828›Full record

ArticleJournal of applied physiology (Bethesda, Md. : 1985)2011

Effects of different acute hypoxic regimens on tissue oxygen profiles and metabolic outcomes.

Christian Reinke, Shannon Bevans-Fonti, Luciano F Drager, Mi-Kyung Shin, Vsevolod Y Polotsky

Open access · greenAbstract readComparative Study
In one paragraph

Article in Journal of applied physiology (Bethesda, Md. : 1985), 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 105 papers.

0numbers the graph read from it
0cells of the map it votes in
105citing papers in PubMed
8.0field-weighted citation impact, top 2% 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

105 citing papers in PubMed, 171 citations in OpenAlex.

  1. Trial
  2. Article
  3. Correlation of sleep-disordered breathing with anemia and microcytosis in premenopausal females: the Nagahama study.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2025
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  7. Review
  8. A closed-loop modular multiorgan-on-chips platform for self-sustaining and tightly controlled oxygenation.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  9. Article
  10. Chronic hypoxia impairs skeletal muscle repair via HIF-2α stabilization.Journal of cachexia, sarcopenia and muscle · 2024
    Article
  11. Adipose Tissue Hypoxia in Obesity: Clinical Reappraisal of Hypoxia Hypothesis.Advances in experimental medicine and biology · 2024
    Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
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  20. Article

45 more citing papers are in PubMed but not listed here.

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 3 institutions in 2 countries.

Christian ReinkeDept. of Internal Medicine, Division of Pulmonary Diseases, Univ. Hospital Giessen and Marburg GmbH, 35043 Marburg, Germany. reinke@med.uni-marburg.de
Shannon Bevans-Fonti
Luciano F Drager
Mi-Kyung Shin
Vsevolod Y Polotsky
Johns Hopkins Medicine · USJohns Hopkins University · USPhilipps University of Marburg · DE

Funding

Research BaseP30DK072488 · NIDDK · UNIVERSITY OF MARYLAND BALTIMORE · PI MITCHELL, BRAXTON D, TAYLOR, SIMEON I. · 2005 to 2019
$17.3M
Sleep Related Mechanisms of COPD ProgressionP50HL084945 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI WISE, ROBERT A. · 2007 to 2011
$15.1M
Sleep Apnea and Dysregulation of Lipid MetabolismR01HL080105 · NHLBI · JOHNS HOPKINS UNIVERSITY · PI POLOTSKY, VSEVOLOD Y · 2005 to 2014
$3.4M
NHLBI NIH HHS 5P50-HL-084945NHLBI NIH HHS HL-80105NIDDK NIH HHS P30 DK072488
6 · The paper itself

Abstract

Obstructive sleep apnea (OSA) causes intermittent hypoxia (IH) during sleep. Both obesity and OSA are associated with insulin resistance and systemic inflammation, which may be attributable to tissue hypoxia. We hypothesized that a pattern of hypoxic exposure determines both oxygen profiles in peripheral tissues and systemic metabolic outcomes, and that obesity has a modifying effect. Lean and obese C57BL6 mice were exposed to 12 h of intermittent hypoxia 60 times/h (IH60) [inspired O₂ fraction (Fi(O₂)) 21-5%, 60/h], IH 12 times/h (Fi(O₂) 5% for 15 s, 12/h), sustained hypoxia (SH; Fi(O₂) 10%), or normoxia while fasting. Tissue oxygen partial pressure (Pti(O₂)) in liver, skeletal muscle and epididymal fat, plasma leptin, adiponectin, insulin, blood glucose, and adipose tumor necrosis factor-α (TNF-α) were measured. In lean mice, IH60 caused oxygen swings in the liver, whereas fluctuations of Pti(O₂) were attenuated in muscle and abolished in fat. In obese mice, baseline liver Pti(O₂) was lower than in lean mice, whereas muscle and fat Pti(O₂) did not differ. During IH, Pti(O₂) was similar in obese and lean mice. All hypoxic regimens caused insulin resistance. In lean mice, hypoxia significantly increased leptin, especially during SH (44-fold); IH60, but not SH, induced a 2.5- to 3-fold increase in TNF-α secretion by fat. Obesity was associated with striking increases in leptin and TNF-α, which overwhelmed effects of hypoxia. In conclusion, IH60 led to oxygen fluctuations in liver and muscle and steady hypoxia in fat. IH and SH induced insulin resistance, but inflammation was increased only by IH60 in lean mice. Obesity caused severe inflammation, which was not augmented by acute hypoxic regimens.

Indexed as

Acute DiseaseAdiponectinAdipose TissueAnimalsBlood GlucoseDisease Models, AnimalHypoxiaInflammationInflammation MediatorsInsulinInsulin ResistanceLeptinLiverMaleMiceMice, Inbred C57BLAdiponectinAdipoq protein, mouseBlood GlucoseInflammation MediatorsInsulinLeptinOxygenTumor Necrosis Factor-alpha

Identifiers

PMID21737828
PMCPMC3174795
OpenAlexW2027358194

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.