ArticleToxicological sciences : an official journal of the Society of Toxicology2010
Short-term exposure to triclosan decreases thyroxine in vivo via upregulation of hepatic catabolism in Young Long-Evans rats.
Article in Toxicological sciences : an official journal of the Society of Toxicology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 3 of them syntheses that pooled it.
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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.
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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.
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Who cites it
49 citing papers in PubMed, 3 syntheses or guidelines pooled it, 139 citations in OpenAlex.
- The Influence of Triclosan on the Thyroid Hormone System in Humans - A Systematic Review.Frontiers in endocrinology · 2022Pooled it
- Exposure to non-persistent chemicals in consumer products and fecundability: a systematic review.Human reproduction update · 2019Pooled it
- Application of the Navigation Guide systematic review methodology to the evidence for developmental and reproductive toxicity of triclosan.Environment internationalPooled it
- Triclosan and triclocarban exposure and thyroid function during pregnancy-A randomized intervention.Reproductive toxicology (Elmsford, N.Y.) · 2017Trial
- Article
- Phenol and Phthalate Effects on Thyroid Hormone Levels during Pregnancy: Relying onEnvironmental health perspectives · 2022Article
- Triclosan-induced neuroinflammation develops caspase-independent and TNF-α signaling pathway associated necroptosis in Neuro-2a cells.Current research in toxicology · 2022Article
- Effect of triclosan on the pathogenesis of allergic diseases among children.Journal of exposure science & environmental epidemiology · 2022Article
- Effect of Maternal Triclosan Exposure on Neonatal Thyroid-Stimulating Hormone Levels: A Cross-Sectional Study.Journal of environmental and public health · 2022Article
- The Effect of Early Life Exposure to Triclosan on Thyroid Follicles and Hormone Levels in Zebrafish.Frontiers in endocrinology · 2022Article
- Thyroid Disruptors: Extrathyroidal Sites of Chemical Action and Neurodevelopmental Outcome-An Examination Using Triclosan and Perfluorohexane Sulfonate.Toxicological sciences : an official journal of the Society of Toxicology · 2021Article
- Racial/Ethnic Disparities in Pregnancy and Prenatal Exposure to Endocrine-Disrupting Chemicals Commonly Used in Personal Care Products.Current environmental health reports · 2021Review
- Protective effect of Lycium barbarum polysaccharide on di-(2-ethylhexyl) phthalate-induced toxicity in rat liver.Environmental science and pollution research international · 2021Article
- Association of maternal urinary concentration of parabens and neonatal anthropometric indices.Journal of environmental health science & engineering · 2020Article
- Triclocarban, Triclosan, Bromochlorophene, Chlorophene, and Climbazole Effects on Nuclear Receptors: AnEnvironmental health perspectives · 2020Article
- A repeated measures study of phenol, paraben and Triclocarban urinary biomarkers and circulating maternal hormones during gestation in the Puerto Rico PROTECT cohort.Environmental health : a global access science source · 2019Article
- Article
- Relationship between triclosan exposure and thyroid hormones: the Second Korean National Environmental Health Survey (2012-2014).Annals of occupational and environmental medicine · 2019Article
- Cross-sectional associations between urinary triclosan and serum thyroid function biomarker concentrations in women.Environment international · 2019Article
- Administration of low dose triclosan to pregnant ewes results in placental uptake and reduced estradiol sulfotransferase activity in fetal liver and placenta.Toxicology letters · 2018Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
Triclosan (5-chloro-2-(2,4-dichlorophenoxy)-phenol) is a chlorinated phenolic antibacterial compound found in consumer products. In vitro human pregnane X receptor activation, hepatic phase I enzyme induction, and decreased in vivo total thyroxine (T4) suggest adverse effects on thyroid hormone homeostasis. Current research tested the hypothesis that triclosan decreases circulating T4 via upregulation of hepatic catabolism and transport. Weanling female Long-Evans rats received triclosan (0-1000 mg/kg/day) by gavage for 4 days. Whole blood and liver were collected 24 h later. Total serum T4, triiodothyronine (T3), and thyroid-stimulating hormone (TSH) were measured by radioimmunoassay. Hepatic microsomal assays measured ethoxyresorufin-O-deethylase, pentoxyresorufin-O-deethylase (PROD), and uridine diphosphate glucuronyltransferase enzyme activities. The messenger RNA (mRNA) expression of cytochrome P450s 1a1, 2b1/2, and 3a1/23; UGTs 1a1, 1a6, and 2b5; sulfotransferases 1c1 and 1b1; and hepatic transporters Oatp1a1, Oatp1a4, Mrp2, and Mdr1b was measured by quantitative reverse transcriptase PCR. Total T4 decreased dose responsively, down to 43% of control at 1000 mg/kg/day. Total T3 was decreased to 89 and 75% of control at 300 and 1000 mg/kg/day. TSH did not change. Triclosan dose dependently increased PROD activity up to 900% of control at 1000 mg/kg/day. T4 glucuronidation increased nearly twofold at 1000 mg/kg/day. Cyp2b1/2 and Cyp3a1/23 mRNA expression levels were induced twofold and fourfold at 300 mg/kg/day. Ugt1a1 and Sult1c1 mRNA expression levels increased 2.2-fold and 2.6-fold at 300 mg/kg/day. Transporter mRNA expression levels were unchanged. These data denote important key events in the mode of action for triclosan-induced hypothyroxinemia in rats and suggest that this effect may be partially due to upregulation of hepatic catabolism but not due to mRNA expression changes in the tested hepatic transporters.
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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.