Evidence map›Paper›PMID 28558787›Full record

ArticleParticle and fibre toxicology2017

Airway exposure to multi-walled carbon nanotubes disrupts the female reproductive cycle without affecting pregnancy outcomes in mice.

H K L Johansson, J S Hansen, B Elfving, S P Lund, Z O Kyjovska, S Loft, K K Barfod, P Jackson, U Vogel, K S Hougaard

Open access · goldAbstract read
In one paragraph

Article in Particle and fibre toxicology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
2.5field-weighted citation impact, top 12% 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

11 citing papers in PubMed, 32 citations in OpenAlex.

  1. Review
  2. Review
  3. Fetotoxicity of Nanoparticles: Causes and Mechanisms.Nanomaterials (Basel, Switzerland) · 2021
    Review
  4. Advanced applications of nanotechnology in veterinary medicine.Environmental science and pollution research international · 2020
    Review
  5. Article
  6. Article
  7. Application of some nanoparticles in the field of veterinary medicine.International journal of veterinary science and medicine · 2019
    Review
  8. Article
  9. Article
  10. Article
  11. 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

10 authors at 4 institutions in 1 country.

H K L JohanssonNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
J S HansenNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
B ElfvingTranslational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Risskov, DK-8240, Denmark.
S P LundNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
Z O KyjovskaNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
S LoftSection of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen K, DK-1014, Denmark.
K K BarfodNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
P JacksonNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
U VogelNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark.
K S HougaardNational Research Centre for the Working Environment, Copenhagen Ø, DK-2100, Denmark. ksh@nrcwe.dk.
National Research Centre for the Working Environment · DKUniversity of Copenhagen · DKAarhus University · DKTechnical University of Denmark · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe use of multiwalled carbon nanotubes (MWCNT) is increasing due to a growing use in a variety of products across several industries. Thus, occupational exposure is also of increasing concern, particularly since airway exposure to MWCNTs can induce sustained pulmonary acute phase response and inflammation in experimental animals, which may affect female reproduction. This proof-of-principle study therefore aimed to investigate if lung exposure by intratracheal instillation of the MWCNT NM-400 would affect the estrous cycle and reproductive function in female mice.

resultsEstrous cycle regularity was investigated by comparing vaginal smears before and after exposure to 67 μg of NM-400, whereas reproductive function was analyzed by measuring time to delivery of litters after instillation of 2, 18 or 67 μg of NM-400. Compared to normal estrous cycling determined prior to exposure, exposure to MWCNT significantly prolonged the estrous cycle during which exposure took place, but significantly shortened the estrous cycle immediately after the exposed cycle. No consistent effects were seen on time to delivery of litter or other gestational or litter parameters, such as litter size, sex ratio, implantations and implantation loss.

conclusionLung exposure to MWCNT interfered with estrous cycling. Effects caused by MWCNTs depended on the time of exposure: the estrous stage was particularly sensitive to exposure, as animals exposed during this stage showed a higher incidence of irregular cycling after exposure. Our data indicates that MWCNT exposure may interfere with events leading to ovulation.

Indexed as

Inhalation ExposurePregnancy OutcomeAnimalsBrainEstrous CycleFemaleGene Expression RegulationMice, Inbred C57BLNanotubes, CarbonOvulationPregnancyProof of Concept StudyReproductionRisk AssessmentTime FactorsNanotubes, CarbonDevelopmental toxicityEstrous cycleFemaleFertilityMulti-walled carbon nanotubesNanomaterialsOvulationPregnancyReproductive toxicity

Identifiers

PMID28558787
PMCPMC5450058
OpenAlexW2618879758

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.