Evidence map›Paper›PMID 18535258›Full record

ArticleAmerican journal of respiratory and critical care medicine2008

Erectile dysfunction in a murine model of sleep apnea.

Galia K Soukhova-O'Hare, Zahoor A Shah, Zhenmin Lei, Alexander D Nozdrachev, C Venkateswara Rao, David Gozal

Open access · greenAbstract read
In one paragraph

Article in American journal of respiratory and critical care medicine, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 6% 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

38 citing papers in PubMed, 1 synthesis or guideline pooled it, 82 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Mechanisms underlying end-organ injury in sleep apnoea.The European respiratory journal · 2026
    Review
  4. Review
  5. Review
  6. Article
  7. Impact of hypoxia on male reproductive functions.Molecular and cellular biochemistry · 2023
    Review
  8. Article
  9. Review
  10. Obstructive Sleep Apnea Affects Lacrimal Gland Function.Investigative ophthalmology & visual science · 2022
    Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Observational
  17. Effects of Environmental and Pathological Hypoxia on Male Fertility.Frontiers in cell and developmental biology · 2021
    Review
  18. Article
  19. Review
  20. Article
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 2 countries.

Galia K Soukhova-O'HareKosair Children's Hospital Research Institute, University of Louisville, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA.
Zahoor A Shah
Zhenmin Lei
Alexander D Nozdrachev
C Venkateswara Rao
David Gozal
University of Louisville · USSt Petersburg University · RU

Funding

TRANSMITTER RELEASE ONTO AIRWAY MOTONEURONS DURING SLEEPP50HL060296 · NHLBI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI SIEGEL, JEROME M · 1998 to 2007
$12.5M
NEUROCOGNITIVE FUNCTION IN SNORING CHILDRENR01HL065270 · NHLBI · UNIVERSITY OF LOUISVILLE · PI GOZAL, DAVID · 1999 to 2014
$5.0M
Postnatal Brain Susceptibility to Intermittent HypoxiaR01HL069932 · NHLBI · UNIVERSITY OF LOUISVILLE · PI GOZAL, DAVID · 2002 to 2006
$1.8M
Perinatal Intermittent Hypoxia and Baroreflex FunctionF32HL070494 · NHLBI · UNIVERSITY OF LOUISVILLE · PI SOUKHOVA, GALIA K · 2002 to 2004
$167k
NHLBI NIH HHS 2P50HL60296NHLBI NIH HHS F32HL70494NHLBI NIH HHS HL65270NHLBI NIH HHS HL69932
6 · The paper itself

Abstract

rationaleErectile dysfunction (ED) is frequent in obstructive sleep apnea syndrome (OSAS). Chronic intermittent hypoxia (CIH), one of the hallmarks of OSAS, could mediate ED.

objectivesTo determine whether intermittent hypoxia during sleep affects erectile dysfunction in mice.

methodsThree groups of C57BL/6 mice were exposed to CIH for 5 or 24 weeks. Sexual function was evaluated by in vivo telemetry of corpus spongiosum pressure. Spontaneous erections, sexual activity during mating, and noncontact tests were assessed after 5 weeks of CIH and after treatment with tadalafil. Plasma testosterone was measured after 8 and 24 weeks of CIH, and the expression of nitric oxide synthase (NOS) isoforms was examined in penile tissue. MEASUREMENTS AND MAIN

resultsNoncontact, spontaneous, and contact sexual activity in the mice was suppressed after CIH. Spontaneous erection counts decreased after the first week of CIH by 55% (P < 0.001) and remained unchanged thereafter. Recovery of erectile activity during normoxia for 6 weeks was incomplete. Compared with control mice, latencies for mounts and intromissions increased by 60- and 40-fold, respectively (P < 0.001), and the sexual activity index decreased sixfold. Tadalafil treatment significantly attenuated these effects. Immunoblot analyses of NOS proteins in the erectile tissue showed decreased expression of endothelial NOS after CIH (P < 0.01), with no changes in plasma testosterone levels after 8 and 24 weeks of CIH.

conclusionsCIH during sleep is associated with decreased libido in mice. The decreased expression of endothelial NOS protein in erectile tissue and the favorable response to tadalafil suggest that altered nitric oxide mechanisms underlie CIH-mediated ED. No changes in testosterone emerge after intermittent hypoxia.

Indexed as

AnimalsBlotting, WesternCarbolinesComorbidityDisease Models, AnimalErectile DysfunctionEstradiolHypoxiaImmunohistochemistryLibidoMaleMiceMice, Inbred C57BLNitric Oxide SynthasePenisPhosphodiesterase InhibitorsCarbolinesEstradiolNitric Oxide SynthasePhosphodiesterase InhibitorsTadalafilTestosterone

Identifiers

PMID18535258
PMCPMC2542437
OpenAlexW2169912922

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.