Evidence map›Paper›PMID 31841107›Full record

ArticleeLife2019

Opioids modulate an emergent rhythmogenic process to depress breathing.

Xiaolu Sun, Carolina Thörn Pérez, Nagaraj Halemani D, Xuesi M Shao, Morgan Greenwood, Sarah Heath, Jack L Feldman, Kaiwen Kam

Open access · goldAbstract read
In one paragraph

Article in eLife, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 1 pooled it
2.7field-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

36 citing papers in PubMed, 1 synthesis or guideline pooled it, 54 citations in OpenAlex.

  1. The role of acetazolamide in sleep apnea at sea level: a systematic review and meta-analysis.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2021
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Opioids and Respiratory Related Consequences.Sleep medicine clinics · 2025
    Review
  6. Article
  7. Review
  8. Xylazine exacerbates fentanyl-induced respiratory depression and bradycardia.The Journal of pharmacology and experimental therapeutics · 2025
    Article
  9. Endogenous opioids and the development of the mammalian respiratory control network.American journal of physiology. Lung cellular and molecular physiology · 2025
    Review
  10. Article
  11. Article
  12. Inhibitory Subpopulations in preBötzinger Complex Play Distinct Roles in Modulating Inspiratory Rhythm and Pattern.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
  13. Interdependence of cellular and network properties in respiratory rhythm generation.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  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

8 authors at 2 institutions in 1 country.

Xiaolu Sun *Department of Neurobiology, David Geffen School of Medicine at UCLA, Los Angeles, United States.
Carolina Thörn Pérez *Department of Neurobiology, David Geffen School of Medicine at UCLA, Los Angeles, United States.ORCID 0000-0002-3480-8599
Nagaraj Halemani DDepartment of Cell Biology and Anatomy, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, United States.
Xuesi M ShaoDepartment of Neurobiology, David Geffen School of Medicine at UCLA, Los Angeles, United States.ORCID 0000-0002-5165-347X
Morgan GreenwoodRFUMS/DePaul Research Internship Program, Rosalind Franklin University of Medicine and Science, North Chicago, United States.
Sarah HeathDepartment of Neurobiology, David Geffen School of Medicine at UCLA, Los Angeles, United States.
Jack L FeldmanDepartment of Neurobiology, David Geffen School of Medicine at UCLA, Los Angeles, United States.ORCID 0000-0003-3692-9412
Kaiwen KamDepartment of Cell Biology and Anatomy, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, United States.ORCID 0000-0002-8479-0542
University of California, Los Angeles · USRosalind Franklin University of Medicine and Science · US

Funding

The Role of Striosome Neurons in Mediating Opiod RewardP50DA005010 · NIDA · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI YANG, XIANGDONG WILLIAM · 1987 to 2021
$30.7M
Neural control of breathingR35HL135779 · NHLBI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI FELDMAN, JACK L · 2017 to 2023
$5.6M
Functional Dissection of Medullary Respiratory MicrocircuitsR01NS072211 · NINDS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI FELDMAN, JACK L · 2010 to 2020
$3.8M
Maternal inhaled nicotine leads to aberrant development of hypertensive phenotypeR01HL135623 · NHLBI · LOMA LINDA UNIVERSITY · PI SHAO, XUESI MAX, XIAO, DALIAO · 2017 to 2021
$2.3M
The role of inhibitory microcircuits in the neural control of breathingR01NS097492 · NINDS · ROSALIND FRANKLIN UNIV OF MEDICINE & SCI · PI KAM, KAIWEN · 2017 to 2021
$1.7M
NHLBI NIH HHS R01 HL135623NHLBI NIH HHS R35 HL135779NIDA NIH HHS P50 DA005010NIH HHS HL135779NIH HHS NS072211NIH HHS NS097492NINDS NIH HHS R01 NS072211NINDS NIH HHS R01 NS097492
6 · The paper itself

Abstract

How mammalian neural circuits generate rhythmic activity in motor behaviors, such as breathing, walking, and chewing, remains elusive. For breathing, rhythm generation is localized to a brainstem nucleus, the preBötzinger Complex (preBötC). Rhythmic preBötC population activity consists of strong inspiratory bursts, which drive motoneuronal activity, and weaker burstlets, which we hypothesize reflect an emergent rhythmogenic process. If burstlets underlie inspiratory rhythmogenesis, respiratory depressants, such as opioids, should reduce burstlet frequency. Indeed, in medullary slices from neonatal mice, the μ-opioid receptor (μOR) agonist DAMGO slowed burstlet generation. Genetic deletion of μORs in a glutamatergic preBötC subpopulation abolished opioid-mediated depression, and the neuropeptide Substance P, but not blockade of inhibitory synaptic transmission, reduced opioidergic effects. We conclude that inspiratory rhythmogenesis is an emergent process, modulated by opioids, that does not rely on strong bursts of activity associated with motor output. These findings also point to strategies for ameliorating opioid-induced depression of breathing.

Indexed as

Analgesics, OpioidAnimalsBiological ClocksEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Homeodomain ProteinsMiceMice, Inbred C57BLMice, TransgenicMotor NeuronsReceptors, Opioid, muRespirationRespiratory CenterSynaptic TransmissionAnalgesics, OpioidDbx1 protein, mouseEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Homeodomain ProteinsOprm protein, mouseReceptors, Opioid, mubreathingcentral pattern generatormotor systemsmouseneuroscienceopioidsrhythm generation

Identifiers

PMID31841107
PMCPMC6938398
OpenAlexW2995388315

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.