ArticleParticle and fibre toxicology2015
Lung inflammation and lack of genotoxicity in the comet and micronucleus assays of industrial multiwalled carbon nanotubes Graphistrength(©) C100 after a 90-day nose-only inhalation exposure of rats.
Article in Particle and fibre toxicology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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.
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.
Who cites it
16 citing papers in PubMed, 45 citations in OpenAlex.
- A Review of the Carcinogenic Potential of Thick Rigid and Thin Flexible Multi-Walled Carbon Nanotubes in the Lung.Nanomaterials (Basel, Switzerland) · 2025Review
- Adverse effects of nanoparticles on humans.Journal of occupational health · 2025Review
- Critical values for dimensional parameters of mesotheliomagenic mineral fibers: evidence from the dimensions and rigidity of MWCNT.Frontiers in toxicology · 2025Article
- The use of nanoparticles in the treatment of infectious diseases and cancer, dental applications and tissue regeneration: a review.Frontiers in medical technology · 2023Review
- Retained particle surface area dose drives inflammation in rat lungs following acute, subacute, and subchronic inhalation of nanomaterials.Particle and fibre toxicology · 2021Article
- Review
- Carbon Nanotubes: Probabilistic Approach for Occupational Risk Assessment.Nanomaterials (Basel, Switzerland) · 2021Article
- Toxicity of Nanoparticles in Biomedical Application: Nanotoxicology.Journal of toxicology · 2021Review
- Selective Uptake of Carboxylated Multi-Walled Carbon Nanotubes by Class A Type 1 Scavenger Receptors and Impaired Phagocytosis in Alveolar Macrophages.Nanomaterials (Basel, Switzerland) · 2020Article
- Physicochemical predictors of Multi-Walled Carbon Nanotube-induced pulmonary histopathology and toxicity one year after pulmonary deposition of 11 different Multi-Walled Carbon Nanotubes in mice.Basic & clinical pharmacology & toxicology · 2019Article
- Article
- Review of toxicity studies of carbon nanotubes.Journal of occupational health · 2017Review
- Different Cellular Response of Human Mesothelial Cell MeT-5A to Short-Term and Long-Term Multiwalled Carbon Nanotubes Exposure.BioMed research international · 2017Article
- Long-term intravenous administration of carboxylated single-walled carbon nanotubes induces persistent accumulation in the lungs and pulmonary fibrosis via the nuclear factor-kappa B pathway.International journal of nanomedicine · 2017Article
- Evaluating the mechanistic evidence and key data gaps in assessing the potential carcinogenicity of carbon nanotubes and nanofibers in humans.Critical reviews in toxicology · 2017Review
- The pulmonary inflammatory response to multiwalled carbon nanotubes is influenced by gender and glutathione synthesis.Redox biology · 2016Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
12 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundGraphistrength (©) C100 multiwalled carbon nanotubes (MWCNT) provide superior electrical and mechanical properties for various applications. The evaluation of the intrinsic hazard properties of Graphistrength(©) C100 is an essential step for safe use. A general feature of multiwalled carbon nanotubes after inhalation or intratracheal exposures is the induction of an inflammatory reaction in the lungs sometimes associated with local genotoxic effects.
methodsAfter investigating different parameters for the aerosol generation and performing a 5-day inhalation range finding study, male and female Wistar rats were exposed nose-only for 90 days to target concentrations of 0.05, 0.25 and 5.0 mg/m(3) air of Graphistrength (©) C100 and sacrificed 24 h and 90 days after the last exposure. Broncho-alveolar lavage fluid (BALF) was also collected and analyzed for inflammatory parameters. Twenty-four hours post-exposure, chromosomal aberrations in the bone marrow cells were evaluated by the micronucleus test and DNA damages in the lung, kidney and liver cells by both the standard and the human 8-oxoguanine DNA N-glycosylase 1 (hOGG1)-modified comet assay. All studies were performed according to the OECD test guidelines.
resultsAn inflammatory lung reaction and the release of inflammatory factors in the BALF were observed in all rats exposed to 5.0 mg/m(3), associated with changes in the differential white blood cells counts. The slight changes in BALF parameters at 0.25 mg/m(3) recovered and signs of lung clearance of the MWCNT were observed. No pathological changes were observed on the pleura. Neither increase in the number of micronucleated polychromatic erythrocytes nor increase in percent DNA damage were observed at any concentration.
conclusionsLung inflammation characteristic of an overload with insoluble particles was observed after a 90-day exposure to 5.0 mg/m(3) of Graphistrength (©) C100. Clear signs of clearance and recovery were observed at 0.25 mg/m(3). No genotoxicity was detected locally in lung and distally in bone marrow, liver and kidney. Therefore, Graphistrength (©) C100 appears of low concern in term of local and systemic genotoxicity and a No-Observed Adverse Effect Concentration (NOAEC) of 0.25 mg/m(3) (0.28 mg/m(3) as actual concentration) was established for the repeated-dose toxicity.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.