457 results match your criteria tcdd induces

Neurons expressing the aryl hydrocarbon receptor in the locus coeruleus and island of Calleja major are novel targets of dioxin in the mouse brain.

Histochem Cell Biol 2021 May 8. Epub 2021 May 8.

Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.

The aryl hydrocarbon receptor (AhR) acts as a receptor that responds to ligands, including dioxin. The AhR-ligand complex translocates from the cytoplasm into the nucleus to induce gene expression. Because dioxin exposure impairs cognitive and neurobehavioral functions, AhR-expressing neurons need to be identified for elucidation of the dioxin neurotoxicity mechanism. Read More

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2,3,7,8-Tetrachlorodibenzo-p-dioxin exposure disrupts development of the visceral and ocular vasculature.

Aquat Toxicol 2021 May 24;234:105786. Epub 2021 Feb 24.

Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, USA. Electronic address:

The aryl hydrocarbon receptor (AHR) has endogenous functions in mammalian vascular development and is necessary for mediating the toxic effects of a number of environmental contaminants. Studies in mice have demonstrated that AHR is necessary for the formation of the renal, retinal, and hepatic vasculature. In fish, exposure to the prototypic AHR agonist 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induces expression of the AHR biomarker cyp1a throughout the developing vasculature and produces vascular malformations in the head and heart. Read More

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A prolonged exposure of human lung carcinoma epithelial cells to benzo[a]pyrene induces p21-dependent epithelial-to-mesenchymal transition (EMT)-like phenotype.

Chemosphere 2021 Jan 10;263:128126. Epub 2020 Sep 10.

Department of Chemistry and Toxicology, Veterinary Research Institute, Brno, Czech Republic. Electronic address:

Deciphering the role of the aryl hydrocarbon receptor (AhR) in lung cancer cells may help us to better understand the role of toxic AhR ligands in lung carcinogenesis, including cancer progression. We employed human lung carcinoma A549 cells to investigate their fate after continuous two-week exposure to model AhR agonists, genotoxic benzo[a]pyrene (BaP; 1 μM) and non-genotoxic 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD; 10 nM). While TCDD increased proliferative rate of A549 cells, exposure to BaP decreased cell proliferation and induced epithelial-to-mesenchymal transition (EMT)-like phenotype, which was associated with enhanced cell migration, invasion, and altered cell morphology. Read More

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January 2021

TCDD-induced multi- and transgenerational changes in the methylome of male zebrafish gonads.

Environ Epigenet 2020 27;6(1):dvaa010. Epub 2020 Sep 27.

Department of Pharmacology, Wayne State University, Detroit, 540 E. Canfield, Detroit, MI, 48201, USA.

The legacy endocrine disrupting chemical and aryl hydrocarbon receptor agonist, 2,3,7,8-tetrachlorodibenzo--dioxin (TCDD), is produced as a byproduct of industrial processes and causes adverse health effects ranging from skin irritation to cancer. TCDD endpoints are also observed in subsequent, unexposed generations; however, the mechanisms of these multi- and transgenerational effects are unknown. We hypothesized an epigenetic mechanism, specifically DNA methylation for the transgenerational, male-mediated reproductive effects of developmental TCDD exposure. Read More

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September 2020

From Suppressor T cells to Regulatory T cells: How the Journey That Began with the Discovery of the Toxic Effects of TCDD Led to Better Understanding of the Role of AhR in Immunoregulation.

Int J Mol Sci 2020 Oct 22;21(21). Epub 2020 Oct 22.

Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, SC 29208, USA.

Aryl hydrocarbon receptor (AhR) was identified in the early 1970s as a receptor for the ubiquitous environmental contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD, dioxin), which is a member of halogenated aromatic hydrocarbons (HAHs). TCDD was found to be highly toxic to the immune system, causing thymic involution and suppression of a variety of T and B cell responses. The fact that environmental chemicals cause immunosuppression led to the emergence of a new field, immunotoxicology. Read More

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October 2020

Dioxin Disrupts Dynamic DNA Methylation Patterns in Genes That Govern Cardiomyocyte Maturation.

Toxicol Sci 2020 12;178(2):325-337

Department of Environmental Health and Center for Environmental Genetics.

Congenital heart disease (CHD), the leading birth defect worldwide, has a largely unknown etiology, likely to result from complex interactions between genetic and environmental factors during heart development, at a time when the heart adapts to diverse physiological and pathophysiological conditions. Crucial among these is the regulation of cardiomyocyte development and postnatal maturation, governed by dynamic changes in DNA methylation. Previous work from our laboratory has shown that exposure to the environmental toxicant tetrachlorodibenzo-p-dioxin (TCDD) disrupts several molecular networks responsible for heart development and function. Read More

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December 2020

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) dysregulates hepatic one carbon metabolism during the progression of steatosis to steatohepatitis with fibrosis in mice.

Sci Rep 2020 09 9;10(1):14831. Epub 2020 Sep 9.

Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48824, USA.

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), a persistent environmental contaminant, induces steatosis that can progress to steatohepatitis with fibrosis, pathologies that parallel stages in the development of non-alcoholic fatty liver disease (NAFLD). Coincidently, one carbon metabolism (OCM) gene expression and metabolites are often altered during NAFLD progression. In this study, the time- and dose-dependent effects of TCDD were examined on hepatic OCM in mice. Read More

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September 2020

Comparison of the biological behaviors of palatal mesenchymal and epithelial cells induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin in vitro.

Toxicol Lett 2020 Oct 5;333:90-96. Epub 2020 Aug 5.

Department of Burn and Plastic Surgery Children's hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders; Chongqing Key Laboratory of Pediatrics. Electronic address:

2,3,7,8-Tetrachlorodibenzo- p-dioxin (TCDD) effectively induces cleft palate at increased doses, but its mechanism of involvement is unclear, and arguments have examined palatal shelf contact and/or fusion failure. The role of different types of cells constituting palatal skulls remains elusive regarding TCDD dosage. No reports have simultaneously compared the biological behaviors of TCDD- induced mesenchymal and epithelial cells in vitro. Read More

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October 2020

Vitamin B12 and folic acid alleviate symptoms of nutritional deficiency by antagonizing aryl hydrocarbon receptor.

Proc Natl Acad Sci U S A 2020 07 22;117(27):15837-15845. Epub 2020 Jun 22.

Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520;

Despite broad appreciation of their clinical utility, it has been unclear how vitamin B12 and folic acid (FA) function at the molecular level to directly prevent their hallmark symptoms of deficiency like anemia or birth defects. To this point, B12 and FA have largely been studied as cofactors for enzymes in the one-carbon (1C) cycle in facilitating the de novo generation of nucleotides and methylation of DNA and protein. Here, we report that B12 and FA function as natural antagonists of aryl hydrocarbon receptor (AhR). Read More

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Gestational dioxin exposure suppresses prolactin-stimulated nursing in lactating dam rats to impair development of postnatal offspring.

Biochem Pharmacol 2020 08 20;178:114106. Epub 2020 Jun 20.

Laboratory of Molecular Life Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan; Division of Pharmaceutical Cell Biology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan. Electronic address:

A number of epidemiological studies have implicated environmental chemicals including dioxins in the induction of negative effects on child development. To clarify the underlying mechanisms, almost all toxicologists have concentrated on effects on the offspring themselves. We examined an alternative hypothesis that gestational exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a highly-toxic dioxin, targets factors related to maternal childcare to disturb offspring development. Read More

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Aryl Hydrocarbon Receptor-Dependent inductions of omega-3 and omega-6 polyunsaturated fatty acid metabolism act inversely on tumor progression.

Sci Rep 2020 05 12;10(1):7843. Epub 2020 May 12.

Department of Pathology & Laboratory Medicine, University of California, Los Angeles, CA, 90095, USA.

The Western diet contains a high ratio of omega-6 (ω6) to omega-3 (ω3) polyunsaturated fatty acids (PUFA). The prototypical aryl hydrocarbon receptor (AHR) ligand, 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), induces CYP1 family enzymes, which can metabolize PUFA to epoxides. Mice fed ω3-rich or ω6-rich diets were treated with TCDD and injected subcutaneously with AHR-competent Hepa1-GFP hepatoma cells or AHR-deficient LLC lung cancer cells. Read More

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Kaempferol modulates TCDD- and t-BHQ-induced drug-metabolizing enzymes and luteolin enhances this effect.

Food Funct 2020 Apr;11(4):3668-3680

Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo, Japan.

The expression of drug-metabolizing enzymes is deeply involved in chemical-induced cancer progression and prevention. The aryl hydrocarbon receptor (AhR) induces phase I, and certain phase II drug-metabolizing enzymes after the binding of ligands, such as 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). We have previously demonstrated that luteolin inhibited TCDD-induced AhR transformation, and modulated the expression of drug-metabolizing enzymes through not only the AhR, but also the nuclear factor-erythroid-2-related factor 2 (Nrf2). Read More

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Quercetin induces an immunoregulatory phenotype in maturing human dendritic cells.

Immunobiology 2020 07 24;225(4):151929. Epub 2020 Feb 24.

Department of Immune Modulation, Universitätsklinikum Erlangen, Erlangen D-91052, Germany. Electronic address:

The aryl hydrocarbon receptor (AhR) is an environmental sensor and ligand-activated transcription factor that is critically involved in the regulation of inflammatory responses and the induction of tolerance by modulating immune cells. As dendritic cells (DCs) express high AhR levels, they are efficient to induce immunomodulatory effects after being exposed to AhR-activating compounds derived from the environment or diet. To gain new insights into the molecular targets following AhR-activation in human monocyte-derived (mo)DCs, we investigated whether the natural AhR ligand quercetin or the synthetic ligand 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) modulates the function of human moDCs regarding their capability to prime naïve T cells or to migrate. Read More

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TCDD-mediated suppression of naïve human B cell IgM secretion involves aryl hydrocarbon receptor-mediated reduction in STAT3 serine 727 phosphorylation and is restored by interferon-γ.

Cell Signal 2020 01 31;65:109447. Epub 2019 Oct 31.

Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States; Department of Toxicology & Pharmacology, Michigan State University, East Lansing, MI, United States; Center for Research on Ingredient Safety, MIchigan State University, East Lansing, MI, United States. Electronic address:

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a persistent environmental contaminant formed as a byproduct in organic synthesis and burning of organic materials. TCDD has potent immunotoxic effects in B lymphocytes resulting in decreased cellular activation and suppressed IgM secretion following activation with CD40 ligand. Previous work from our lab demonstrated that TCDD treatment of naïve human B cells resulted in significant increases in the levels of the tyrosine phosphatase SHP-1, which corresponded with suppression of IgM secretion. Read More

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January 2020

Proposed Key Characteristics of Female Reproductive Toxicants as an Approach for Organizing and Evaluating Mechanistic Data in Hazard Assessment.

Environ Health Perspect 2019 07 19;127(7):75001. Epub 2019 Jul 19.

School of Public Health, University of California, Berkeley, Berkeley, California, USA.

Background: Identification of female reproductive toxicants is currently based largely on integrated epidemiological and toxicology data and, to a lesser degree, on mechanistic data. A uniform approach to systematically search, organize, integrate, and evaluate mechanistic evidence of female reproductive toxicity from various data types is lacking.

Objective: We sought to apply a key characteristics approach similar to that pioneered for carcinogen hazard identification to female reproductive toxicant hazard identification. Read More

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Cardiotoxicity induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin exposure through lactation in mice.

J Toxicol Sci 2019 ;44(7):505-513

Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo.

Dioxins are a group of structurally related chemicals that persist in the environment. Exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), the most toxic congener, is a suspected risk factor for cardiac diseases in humans. TCDD induces signs of cardiotoxicity in various animals. Read More

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November 2019

2,3,7,8-Tetrachlorodibenzo-p-dioxin Induces Vascular Dysfunction That is Dependent on Perivascular Adipose and Cytochrome P4501A1 Expression.

Cardiovasc Toxicol 2019 12;19(6):565-574

Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, 2703 Frontier Ave NE MSC09 5630, Albuquerque, NM, 87131, USA.

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is associated with hypertension in humans and animals, and studies suggest that cytochrome P4501A1 (Cyp1a1) induction and vascular dysfunction may contribute. We investigated the role of perivascular adipose tissue (PVAT) and Cyp1a1 in TCDD-induced vascular dysfunction. Cyp1a1 wild-type (WT) and knockout (KO) male mice were fed a dough pill containing 1,4-p-dioxane (TCDD vehicle control) on days 0 and 7, or 1000 ng/kg TCDD on day 0 and 250 ng/kg TCDD on day 7. Read More

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December 2019

3-Methylcholanthrene Induces Chylous Ascites in TCDD-Inducible Poly-ADP-Ribose Polymerase () Knockout Mice.

Int J Mol Sci 2019 May 10;20(9). Epub 2019 May 10.

Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON M5S 1A8, Canada.

TCDD-inducible poly-ADP-ribose polymerase (TIPARP) is an aryl hydrocarbon receptor (AHR) target gene that functions as part of a negative feedback loop to repress AHR activity. mice exhibit increased sensitivity to the toxicological effects of 2,3,7,8-tetrachlorodibenzo--dioxin (TCDD), including lethal wasting syndrome. However, it is not known whether mice also exhibit increased sensitivity to other AHR ligands. Read More

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ahr2, But Not ahr1a or ahr1b, Is Required for Craniofacial and Fin Development and TCDD-dependent Cardiotoxicity in Zebrafish.

Toxicol Sci 2019 07;170(1):25-44

Medical Scientist Training Program & Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, Alabama, 35294.

The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor that binds environmental toxicants and regulates gene expression. AHR also regulates developmental processes, like craniofacial development and hematopoiesis, in the absence of environmental exposures. Zebrafish have 3 paralogs of AHR: ahr1a, ahr1b, and ahr2. Read More

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Understanding ligands driven mechanism of wild and mutant aryl hydrocarbon receptor in presence of phytochemicals combating Parkinson's disease: an and study.

J Biomol Struct Dyn 2020 02 2;38(3):807-826. Epub 2019 Apr 2.

Neurobiology Laboratory, Department of Zoology, School of Life Sciences, Ravenshaw University, Cuttack, Odisha, India.

Aryl Hydrocarbon Receptor (AhR) is a key player to regulate the expression of a group of enzymes known as cytochrome P450s (CYPs) super family (CYP1A1, CYP1B1, CYP2B6, and CYP2E1) which metabolites diverse endogenous as well as toxic compounds such as Benzo[a] Pyrene (B[a] P) and TCDD. B[a] P induces oxidative stress and causes degeneration of dopaminergic neurons in the midbrain, may leads to Parkinson's disease (PD). The metabolism of B[a] P through the expression of CYPs is mainly triggered after binding of B[a] P within ligand binding domain of AhR. Read More

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February 2020

Significance of AHR nuclear translocation sequence in 2,3,7,8-tetrachlorodibenzo-p-dioxin-induced cPLAα activation and hydronephrosis.

Arch Toxicol 2019 05 21;93(5):1255-1264. Epub 2019 Feb 21.

Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan.

The aryl hydrocarbon receptor (AHR) plays a major role in 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-induced toxicity phenotypes. TCDD bound to AHR elicits both genomic action in which target genes are transcriptionally upregulated and nongenomic action in which cytosolic phospholipase Aα (cPLAα) is rapidly activated. However, how either of these actions, separately or in combination, induces toxicity phenotypes is largely unknown. Read More

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Mechanisms of Developmental Toxicity of Dioxins and Related Compounds.

Int J Mol Sci 2019 Jan 31;20(3). Epub 2019 Jan 31.

Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan.

Dioxins and related compounds induce morphological abnormalities in developing animals in an aryl hydrocarbon receptor (AhR)-dependent manner. Here we review the studies in which 2,3,7,8-tetrachlorodibenzo--dioxin (TCDD) is used as a prototypical compound to elucidate the pathogenesis of morphological abnormalities. TCDD-induced cleft palate in fetal mice involves a delay in palatogenesis and dissociation of fused palate shelves. Read More

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January 2019

Retinoic acid co-treatment aggravates severity of dioxin-induced skin lesions in hairless mice via induction of inflammatory response.

Biochem Biophys Res Commun 2018 12 31;506(4):854-861. Epub 2018 Oct 31.

NRC Kurchatov Institute, Moscow, Russian Federation. Electronic address:

Exposure to toxic halogenated polyaromatic hydrocarbons, of which 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is the most potent, induces diverse skin pathologies in humans, including chloracne, hyperkeratosis, hamartomas, etc. While the toxic effects of TCDD have been extensively studied, effective approaches to their treatment are still lacking. Retinoids are commonly used in therapy of acneiform skin diseases. Read More

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December 2018

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) induces peripheral blood abnormalities and plasma cell neoplasms resembling multiple myeloma in mice.

Cancer Lett 2019 01 19;440-441:135-144. Epub 2018 Oct 19.

Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA. Electronic address:

Although epidemiologic studies have suggested a possible association between occupational exposures to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and the risk of development of multiple myeloma, definitive evidence in support of this association is lacking. In the present study, we employed the Vk*Myc mouse model of multiple myeloma to assess the impact of TCDD exposure on multiple myeloma pathogenesis. TCDD induced splenomegaly and multiple peripheral blood abnormalities, including anemia and high serum IgG levels. Read More

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January 2019

Cleft palate formation after palatal fusion occurs due to the rupture of epithelial basement membranes.

J Craniomaxillofac Surg 2018 Dec 20;46(12):2027-2031. Epub 2018 Sep 20.

Division of Research and Treatment for Oral and Maxillofacial Congenital Anomalies, School of Dentistry, Aichi-Gakuin University, Japan.

2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) induces cleft palate and hydronephrosis in the mouse embryo. Cleft palate occurs due to failure in palatal grow, but the underlying mechanisms are unclear. We investigated the mechanisms of cleft palate development in TCDD-exposed mouse embryos. Read More

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December 2018

Exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin increases the activation of aryl hydrocarbon receptor and is associated with the aggressiveness of osteosarcoma MG-63 osteoblast-like cells.

Oncol Lett 2018 Sep 6;16(3):3849-3857. Epub 2018 Jul 6.

Department of Thoracic Medicine, Saint Paul's Hospital, Taoyuan 33069, Taiwan, R.O.C.

The aryl hydrocarbon receptor (AhR) is a ligand-dependent transcription factor whose activity is modulated by xenobiotics and physiological ligands. Activation of the AhR by environmental xenobiotics may induce a conformational change in AhR and has been implicated in a variety of cellular processes, including inflammation and tumorigenesis. It is unknown whether the activation of AhR serves a role in modulating the progression of osteosarcoma. Read More

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September 2018

2,3,7,8‑Tetrachlorodibenzo‑p‑dioxin suppresses the growth of human liver cancer HepG2 cells in vitro: Involvement of cell signaling factors.

Int J Oncol 2018 Oct 27;53(4):1657-1666. Epub 2018 Jul 27.

Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095‑1723, USA.

The aryl hydrocarbon receptor (AHR) is transcriptionally active in the form of a heterodimer with the AHR nuclear translocator, which then binds to the xenobiotic responsive element. AHR was originally discovered via its ligand, the polychlorinated hydrocarbon, 2,3,7,8‑tetrachlorodibenzo‑p‑dioxin (TCDD). In this study, we investigated whether TCDD regulates the growth of human liver cancer HepG2 cells in vitro. Read More

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October 2018

Activation of aryl hydrocarbon receptor regulates the LPS/IFNγ-induced inflammatory response by inducing ubiquitin-proteosomal and lysosomal degradation of RelA/p65.

Biochem Pharmacol 2018 09 21;155:141-149. Epub 2018 Jun 21.

Departamento de Biología Celular, CINVESTAV-IPN, Zacatenco, México D. F., Av. IPN 2508, C.P. 07360, Mexico. Electronic address:

Several studies have identified the aryl hydrocarbon receptor (AhR) as a negative regulator of the innate and adaptive immune responses. However, the molecular mechanisms by which this transcription factor exerts such modulatory effects are not well understood. Interaction between AhR and RelA/p65 has previously been reported. Read More

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September 2018

Low dose exposure to HBCD, CB-153 or TCDD induces histopathological and hormonal effects and changes in brain protein and gene expression in juvenile female BALB/c mice.

Reprod Toxicol 2018 09 20;80:105-116. Epub 2018 Jun 20.

Department of Nutritional Sciences, School of Life Course Sciences, King's College London, UK. Electronic address:

Developmental health risks of chronical exposure to low doses of foodborne persistent organic pollutants (POP) are recognized but still largely uncharacterized. Juvenile female BALB/c mice exposed to either HBCD, CB-153 or TCDD at doses relevant to human dietary exposures (49.5 μg, 1. Read More

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September 2018

Exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin promotes inflammation in mouse testes: The critical role of Klotho in Sertoli cells.

Toxicol Lett 2018 Oct 6;295:134-143. Epub 2018 Jun 6.

Department of Immunology, Jinzhou Medical University, Jinzhou, Liaoning, China. Electronic address:

Increasing evidence shows that 2,3,7,8-tetrachlorodibenzo-p-dioxin(TCDD) enhances inflammation, and inflammation has a significant negative impact on fertility. Therefore, the aim of this study was to investigate the effects of TCDD on testis inflammation. Pregnant mice and primary Sertoli cells were treated with TCDD, and male offspring and Sertoli cells were treated with lipopolysaccharides(LPS). Read More

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October 2018