Evidence map›Paper›PMID 31552876›Full record

ArticleMedical gas research

Safety of inhaled hydrogen gas in healthy mice.

Alexis R Cole, Ali Raza, Humera Ahmed, Brian D Polizzotti, Robert F Padera, Nick Andrews, John N Kheir

Open access · hybridAbstract read
In one paragraph

Article in Medical gas research. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 10% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Article
  5. Article
  6. An ethically guided preclinical device for phenotyping HAnimal models and experimental medicine · 2024
    Article
  7. The Protective Role of Molecular Hydrogen in Ischemia/Reperfusion Injury.International journal of molecular sciences · 2024
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Will the hydrogen therapy be approved shortly?Annals of translational medicine · 2020
    Article
  14. Review
  15. 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

7 authors at 3 institutions in 1 country.

Alexis R ColeDepartment of Cardiology, Boston Children's Hospital, Boston, MA, USA.
Ali RazaDepartment of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
Humera AhmedDepartment of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
Brian D PolizzottiDepartment of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
Robert F PaderaDepartment of Pathology, Boston Children's Hospital; Department of Pathology, Harvard Medical School; Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA.
Nick AndrewsDepartment of Neurobiology, Boston Children's Hospital, Boston, MA, USA.
John N KheirDepartment of Cardiology, Boston Children's Hospital; Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
Boston Children's Hospital · USHarvard University · USBrigham and Women's Hospital · US

Funding

VectorP30CA006516 · NCI · DANA-FARBER CANCER INSTITUTE · PI JENNIFER W MACK · 1985 to 2026
$330.6M
Mouse Neurodevelopmental Behavior CoreU54HD090255 · NICHD · BOSTON CHILDREN'S HOSPITAL · PI POMEROY, SCOTT LOREN · 2016 to 2020
$5.2M
NCI NIH HHS P30 CA006516NICHD NIH HHS U54 HD090255
6 · The paper itself

Abstract

The purpose of this work was to determine the safety of inhaled hydrogen gas in healthy animals. Female mice were exposed to medical air with or without hydrogen gas (concentration 2.4%) for 72 hours (n = 25 mice/group). Mice underwent a standardized and validated neurobehavioral examination, SmithKline Beecham, Harwell, Imperial College, Royal London Hospital, Phenotype Assessment (SHIRPA) protocol, prior to and following the exposure period. Blood was withdrawn for serologic evaluation and all major organ tissues were evaluated histologically. The average hydrogen concentration within the chamber was 2.27%. Following exposure, there was no significant change in body weight in either group. Similarly, there was no significant change in the total SHIRPA score, although hydrogen-treated mice exhibited significantly lower spontaneous locomotor activity (P < 0.0001) in a subset of the test; all other aspects of the mouse neurologic exam were normal in hydrogen-treated animals. Brain histopathology was also normal in all mice, as was the histology of all other major organs. There were no significant differences in complete blood count, serum chemistry, or arterial blood gases between control and hydrogen-treated mice (P > 0.05 for all). Hydrogen gas did not appear to cause significant adverse effects when administered to healthy mice for 72 hours, with the possible exception of decreased spontaneous locomotor activity. The study was approved by the Institutional Animal Care and Use Committee at Boston Children's Hospital, USA (approved number 18-01-3536) on January 25, 2018.

Indexed as

SafetyAdministration, InhalationAnimalsDose-Response Relationship, DrugFemaleHydrogenMicePhenotypeSerologic TestsHydrogenadverse effectshydrogen gasischemia-reperfusion injuryneurobehavioral testingneuroprotectionsafety

Identifiers

PMID31552876
PMCPMC6779003
OpenAlexW2974486054

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.