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  1. Article ; Online: Tetra methyl bisphenol F: another potential obesogen.

    Singh, Misha / Crosthwait, Jennifer / Sorisky, Alexander / Atlas, Ella

    International journal of obesity (2005)

    2024  

    Abstract: Background/objectives: Obesity and its associated metabolic diseases are increasing globally. Sedentary lifestyle, high caloric diet, and genetic predisposition are known to contribute to the onset of obesity. It is increasingly recognized that exposure ...

    Abstract Background/objectives: Obesity and its associated metabolic diseases are increasing globally. Sedentary lifestyle, high caloric diet, and genetic predisposition are known to contribute to the onset of obesity. It is increasingly recognized that exposure to environmental chemicals such as Bisphenol A (BPA) may also play a significant role. BPA has been correlated with an array of adverse health effects, including obesity and metabolic disorders. Due to public concern, manufacturers are replacing BPA with structural analogues for which there is limited toxicological data. The objective of this study was to assess the effects of these BPA analogues on adipogenesis.
    Methods: The adipogenic effects of Tetra Methyl Bisphenol F (TMBPF), Bisphenol F (BPF), Bisphenol AP (BPAP), and fluorine-9-bisphenol (BHPF) were evaluated in murine 3T3-L1 cells. The cells were treated with BPA and its analogues at concentrations from 0.01 µM to 20 µM, throughout differentiation, in the absence of Dexamethasone (Dex). Lipid accumulation, mRNA and protein levels of adipogenic markers was assessed.
    Results: We found that TMBPF, BPF and BPA increased 3T3-L1 lipid accumulation and the expression levels of adipogenic markers lipoprotein lipase (Lpl), fatty acid binding protein 4 (Fabp4) and perilipin (Plin) (1-20 µM; p < 0.05), whereas BHPF and BPAP had no effect in this model. Further, TMBPF induced adipogenesis to a greater extent than all the other chemicals including BPA (1-20 µM; p < 0.05). The effect mediated by TMBPF on expression levels of Fabp4, but not Plin, is likely mediated via peroxisome proliferator-activated receptor (PPAR) γ activation.
    Conclusions: Of the BPA analogues tested, BPF was most similar to BPA in its effects, while TMBPF was most adipogenic. In addition, TMBPF is likely a PPARγ agonist, it is likely an obesogenic chemical and may be a metabolic disruptor.
    Language English
    Publishing date 2024-02-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 752409-2
    ISSN 1476-5497 ; 0307-0565
    ISSN (online) 1476-5497
    ISSN 0307-0565
    DOI 10.1038/s41366-024-01496-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Bisphenol S and Bisphenol A disrupt morphogenesis of MCF-12A human mammary epithelial cells.

    Atlas, Ella / Dimitrova, Valeria

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 16005

    Abstract: Breast cancer is one of the most common cancers diagnosed in women worldwide. Genetic predisposition, such as breast cancer 1 (BRCA1) mutations, account for a minor percentage of the total breast cancer incidences. And thus, many life style factors have ... ...

    Abstract Breast cancer is one of the most common cancers diagnosed in women worldwide. Genetic predisposition, such as breast cancer 1 (BRCA1) mutations, account for a minor percentage of the total breast cancer incidences. And thus, many life style factors have also been linked to the disease such as smoking, alcohol consumption and obesity. Emerging studies show that environmental pollutants may also play a role. Bisphenol-A (BPA) has been suspected to contribute to breast cancer development, and has been shown to affect mammary gland development amongst other effects. This prompted its replacement with other bisphenol analogs such as, bisphenol-S (BPS). In this study we used the human mammary epithelial cells, MCF-12A, grown in extracellular matrix to investigate the ability of BPA and BPS to disrupt mammary epithelial cells organization. We show that both BPA and BPS were equipotent in disrupting the organization of the acinar structures, despite BPS being less oestrogenic by other assays. Further, treatment with both compounds enabled the cells to invade the lumen of the structures. This study shows that BPS and BPA are environmental pollutants that may affect mammary development and may contribute to the development of breast cancer.
    MeSH term(s) Benzhydryl Compounds/toxicity ; Breast/drug effects ; Breast/growth & development ; Cell Line ; Endocrine Disruptors/toxicity ; Environmental Pollutants/toxicity ; Epithelial Cells/cytology ; Epithelial Cells/drug effects ; Female ; Humans ; Morphogenesis/drug effects ; Phenols/toxicity ; Sulfones/toxicity
    Chemical Substances Benzhydryl Compounds ; Endocrine Disruptors ; Environmental Pollutants ; Phenols ; Sulfones ; bis(4-hydroxyphenyl)sulfone (80-09-1) ; bisphenol A (MLT3645I99)
    Language English
    Publishing date 2019-11-05
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-52505-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The association between blood PFAS concentrations and clinical biochemical measures of organ function and metabolism in participants of the Canadian Health Measures Survey (CHMS).

    Cakmak, Sabit / Lukina, Anna / Karthikeyan, Subramanian / Atlas, Ella / Dales, Robert

    The Science of the total environment

    2022  Volume 827, Page(s) 153900

    Abstract: Per- and poly-fluoroalkyl substances (PFAS) are ubiquitous and may persist in human tissue for several years. Only a small proportion of PFAS have been studied for human health effects. We tested the association between human blood levels of six PFAS and ...

    Abstract Per- and poly-fluoroalkyl substances (PFAS) are ubiquitous and may persist in human tissue for several years. Only a small proportion of PFAS have been studied for human health effects. We tested the association between human blood levels of six PFAS and several clinical measures of organ and metabolic function in a nationally representative sample of 6768 participants aged 3-79 years old who participated in the Canadian Health Measures Survey. Cross-sectional associations were assessed by generalized linear mixed models incorporating survey-specific sampling weights. An increase in perfluorooctanoic acid (PFOA) equivalent to the magnitude of its geometric mean (GM) of 2.0 μg/L was associated with percentage (95% CI) increases in serum enzymes reflecting liver function: aspartate aminotransferase (AST) 3.7 (1.1, 6.4), gamma-glutamyl transferase (GGT) 11.8 (2.5, 21.8), alanine aminotransferase (ALT) 3.2 (0.5, 5.9), and bilirubin 3.6 (2.7, 4.5). A GM increase in perfluorodecanoic acid (PFDA) of 0.2 μg/L was positively associated with percentage increases in GGT, triglycerides, low-density lipoprotein (LDL) cholesterol, total cholesterol, and calcium with respective increases of 15.5 (2.2, 30.4), 7.0 (1.0, 13.2), 10.7 (5.5, 16.1), 2.8 (0.2, 5.3), and 0.8 (0.3, 1.3). PFOA, perfluorooctane sulfonate (PFOS), PFDA and perfluorononanoic acid (PFNA) were positively associated with GGT. All six congeners were positively associated with at least one biomarker of lipid metabolism, and 5 of 6, PFOA, PFOS, PFDA, perfluorohexane sulfonate (PFHxS) and PFNA were positively associated with serum calcium. Exposure to selected PFAS is associated with clinical blood tests reflecting metabolism and the function of several organ systems. These relatively small changes may possibly indicate early pathology that is clinically inapparent and may possibly be of significance in a general population or in individuals exposed to very high levels of PFAS.
    MeSH term(s) Adaptor Proteins, Signal Transducing ; Adolescent ; Adult ; Aged ; Alkanesulfonic Acids ; Calcium ; Canada ; Child ; Child, Preschool ; Cholesterol ; Cross-Sectional Studies ; Environmental Pollutants ; Fluorocarbons/analysis ; Humans ; Middle Aged ; Young Adult
    Chemical Substances Adaptor Proteins, Signal Transducing ; Alkanesulfonic Acids ; CHM protein, human ; Environmental Pollutants ; Fluorocarbons ; Cholesterol (97C5T2UQ7J) ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2022-02-23
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2022.153900
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Dexamethasone induced miR-155 up-regulation in differentiating 3T3-L1 preadipocytes does not affect adipogenesis.

    Peshdary, Vian / Atlas, Ella

    Scientific reports

    2018  Volume 8, Issue 1, Page(s) 1264

    Abstract: Dexamethasone is a synthetic glucocorticoid that is widely used as an adipogenic inducer in both murine and human in vitro models. Glucocorticoids have been shown to regulate early transcriptional events in adipogenesis. MicroRNAs (miRNAs) have been also ...

    Abstract Dexamethasone is a synthetic glucocorticoid that is widely used as an adipogenic inducer in both murine and human in vitro models. Glucocorticoids have been shown to regulate early transcriptional events in adipogenesis. MicroRNAs (miRNAs) have been also implicated in the regulation of preadipocyte differentiation; however, the effects of glucocorticoids on miRNA expression levels during this process have not been studied. In this study we investigated the effects of glucocorticoids on the expression levels of miR-155 in differentiating 3T3-L1 preadipocytes. We found that miR-155 levels were up-regulated (2.4-fold) by glucocorticoids in differentiating 3T3-L1 preadipocytes, and this enhancement was abolished in the presence of RU486, a glucocorticoid receptor antagonist. In contrast, treatment with rosiglitazone, another adipogenic inducer decreased the expression levels of miR-155 in these cells. Further, our data show that endogenous miR-155 is unlikely to be involved in adipogenesis as we show that both dexamethasone and rosiglitazone induced adipogenesis to similar levels. Furthermore, using miR-155 inhibitor, we showed that the dexamethasone mediated miR-155 enhancement did not alter adipogenesis. Our data show that dexamethasone but not rosiglitazone increases miR-155 expression and that the increased expression of miR-155 is not involved in the dexamethasone-mediated adipogenesis in the 3T3-L1 model.
    MeSH term(s) 3T3 Cells ; Adipocytes/cytology ; Adipocytes/drug effects ; Adipocytes/metabolism ; Adipogenesis ; Animals ; Dexamethasone/pharmacology ; Glucocorticoids/pharmacology ; Mice ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Mifepristone/pharmacology ; Rosiglitazone/pharmacology ; Up-Regulation
    Chemical Substances Glucocorticoids ; MicroRNAs ; Mirn155 microRNA, mouse ; Rosiglitazone (05V02F2KDG) ; Mifepristone (320T6RNW1F) ; Dexamethasone (7S5I7G3JQL)
    Language English
    Publishing date 2018-01-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-018-19704-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: The association between blood PFAS concentrations and clinical biochemical measures of organ function and metabolism in participants of the Canadian Health Measures Survey (CHMS)

    Cakmak, Sabit / Lukina, Anna / Karthikeyan, Subramanian / Atlas, Ella / Dales, Robert

    Science of the total environment. 2022 June 25, v. 827

    2022  

    Abstract: Per- and poly-fluoroalkyl substances (PFAS) are ubiquitous and may persist in human tissue for several years. Only a small proportion of PFAS have been studied for human health effects. We tested the association between human blood levels of six PFAS and ...

    Abstract Per- and poly-fluoroalkyl substances (PFAS) are ubiquitous and may persist in human tissue for several years. Only a small proportion of PFAS have been studied for human health effects. We tested the association between human blood levels of six PFAS and several clinical measures of organ and metabolic function in a nationally representative sample of 6768 participants aged 3–79 years old who participated in the Canadian Health Measures Survey. Cross-sectional associations were assessed by generalized linear mixed models incorporating survey-specific sampling weights. An increase in perfluorooctanoic acid (PFOA) equivalent to the magnitude of its geometric mean (GM) of 2.0 μg/L was associated with percentage (95% CI) increases in serum enzymes reflecting liver function: aspartate aminotransferase (AST) 3.7 (1.1, 6.4), gamma-glutamyl transferase (GGT) 11.8 (2.5, 21.8), alanine aminotransferase (ALT) 3.2 (0.5, 5.9), and bilirubin 3.6 (2.7, 4.5). A GM increase in perfluorodecanoic acid (PFDA) of 0.2 μg/L was positively associated with percentage increases in GGT, triglycerides, low-density lipoprotein (LDL) cholesterol, total cholesterol, and calcium with respective increases of 15.5 (2.2, 30.4), 7.0 (1.0, 13.2), 10.7 (5.5, 16.1), 2.8 (0.2, 5.3), and 0.8 (0.3, 1.3). PFOA, perfluorooctane sulfonate (PFOS), PFDA and perfluorononanoic acid (PFNA) were positively associated with GGT. All six congeners were positively associated with at least one biomarker of lipid metabolism, and 5 of 6, PFOA, PFOS, PFDA, perfluorohexane sulfonate (PFHxS) and PFNA were positively associated with serum calcium. Exposure to selected PFAS is associated with clinical blood tests reflecting metabolism and the function of several organ systems. These relatively small changes may possibly indicate early pathology that is clinically inapparent and may possibly be of significance in a general population or in individuals exposed to very high levels of PFAS.
    Keywords alanine transaminase ; aspartate transaminase ; bilirubin ; biochemical pathways ; biomarkers ; blood serum ; calcium ; environment ; gamma-glutamyltransferase ; human health ; humans ; lipid metabolism ; liver function ; perfluorohexane sulfonic acid ; perfluorononanoic acid ; perfluorooctane sulfonic acid ; perfluorooctanoic acid ; sulfonates ; surveys
    Language English
    Dates of publication 2022-0625
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2022.153900
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Development of a non-radioactive screening assay to detect chemicals disrupting the human sodium iodide symporter activity.

    Dong, Hongyan / Atlas, Ella / Wade, Michael G

    Toxicology in vitro : an international journal published in association with BIBRA

    2019  Volume 57, Page(s) 39–47

    Abstract: Adequate concentration of iodide ions within thyroid epithelial cells, which is mediated by the sodium iodide symporter (NIS), is essential for proper thyroid hormone synthesis. Inhibition of NIS activity represents a potential mechanism by which ... ...

    Abstract Adequate concentration of iodide ions within thyroid epithelial cells, which is mediated by the sodium iodide symporter (NIS), is essential for proper thyroid hormone synthesis. Inhibition of NIS activity represents a potential mechanism by which goitrogens/toxicants can disrupt thyroid hormone physiology. It is necessary to develop a rapid, simple, inexpensive and sensitive screening assay to identify chemicals affecting NIS function. The current study compares the sensitivities of non-radioactive Sandell-Kolthoff (SK) reaction and radioactive iodide uptake (RAIU) in a previously described NIS assay. The EPAhNIS cell line (HEK293T stably transfected to over-express the human NIS) was tested with the reference NIS inhibitor (sodium perchlorate) across multiple log concentration range. The results from SK reaction in EPAhNIS cells showed similar performance to published RAIU results from the same cell line, in terms of assay screening coefficient (Z') and variability (CV). Results from the reference chemicals tested in EPAhNIS cells revealed that SK reaction yielded IC
    MeSH term(s) Biological Assay ; Cell Line ; Cell Survival ; Humans ; Iodides/metabolism ; Symporters/metabolism
    Chemical Substances Iodides ; Symporters ; sodium-iodide symporter (4XE5NDT4K1)
    Language English
    Publishing date 2019-02-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 639064-x
    ISSN 1879-3177 ; 0887-2333
    ISSN (online) 1879-3177
    ISSN 0887-2333
    DOI 10.1016/j.tiv.2019.01.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Empirical Characterization of False Discovery Rates of Differentially Expressed Genes and Transcriptomic Benchmark Concentrations in Zebrafish Embryos.

    Lee, Hyojin / Stead, John D H / Williams, Andrew / Cortés Ramírez, Sergio A / Atlas, Ella / Mennigen, Jan A / O'Brien, Jason M / Yauk, Carole

    Environmental science & technology

    2024  Volume 58, Issue 14, Page(s) 6128–6137

    Abstract: High-throughput transcriptomics (HTTr) is increasingly applied to zebrafish embryos to survey the toxicological effects of environmental chemicals. Before the adoption of this approach in regulatory testing, it is essential to characterize background ... ...

    Abstract High-throughput transcriptomics (HTTr) is increasingly applied to zebrafish embryos to survey the toxicological effects of environmental chemicals. Before the adoption of this approach in regulatory testing, it is essential to characterize background noise in order to guide experimental designs. We thus empirically quantified the HTTr false discovery rate (FDR) across different embryo pool sizes, sample sizes, and concentration groups for toxicology studies. We exposed zebrafish embryos to 0.1% dimethyl sulfoxide (DMSO) for 5 days. Pools of 1, 5, 10, and 20 embryos were created (
    MeSH term(s) Animals ; Zebrafish/genetics ; Dimethyl Sulfoxide/pharmacology ; Dimethyl Sulfoxide/toxicity ; Benchmarking ; Gene Expression Profiling ; Transcriptome ; Embryo, Nonmammalian/metabolism
    Chemical Substances Dimethyl Sulfoxide (YOW8V9698H)
    Language English
    Publishing date 2024-03-26
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.3c10543
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: A 50-gene biomarker identifies estrogen receptor-modulating chemicals in a microarray compendium.

    Corton, J Christopher / Matteo, Geronimo / Chorley, Brian / Liu, Jie / Vallanat, Beena / Everett, Logan / Atlas, Ella / Meier, Matthew J / Williams, Andrew / Yauk, Carole Lyn

    Chemico-biological interactions

    2024  Volume 394, Page(s) 110952

    Abstract: High throughput transcriptomics (HTTr) profiling has the potential to rapidly and comprehensively identify molecular targets of environmental chemicals that can be linked to adverse outcomes. We describe here the construction and characterization of a 50- ...

    Abstract High throughput transcriptomics (HTTr) profiling has the potential to rapidly and comprehensively identify molecular targets of environmental chemicals that can be linked to adverse outcomes. We describe here the construction and characterization of a 50-gene expression biomarker designed to identify estrogen receptor (ER) active chemicals in HTTr datasets. Using microarray comparisons, the genes in the biomarker were identified as those that exhibited consistent directional changes when ER was activated (4 ER agonists; 4 ESR1 gene constitutively active mutants) and opposite directional changes when ER was suppressed (4 antagonist treatments; 4 ESR1 knockdown experiments). The biomarker was evaluated as a predictive tool using the Running Fisher algorithm by comparison to annotated gene expression microarray datasets including those evaluating the transcriptional effects of hormones and chemicals in MCF-7 cells. Depending on the reference dataset used, the biomarker had a predictive accuracy for activation of up to 96%. To demonstrate applicability for HTTr data analysis, the biomarker was used to identify ER activators in a set of 15 chemicals that are considered potential bisphenol A (BPA) alternatives examined at up to 10 concentrations in MCF-7 cells and analyzed by full-genome TempO-Seq. Using benchmark dose (BMD) modeling, the biomarker genes stratified the ER potency of BPA alternatives consistent with previous studies. These results demonstrate that the ER biomarker can be used to accurately identify ER activators in transcript profile data derived from MCF-7 cells.
    MeSH term(s) Humans ; MCF-7 Cells ; Receptors, Estrogen/metabolism ; Receptors, Estrogen/genetics ; Benzhydryl Compounds/toxicity ; Phenols/pharmacology ; Phenols/toxicity ; Gene Expression Profiling ; Oligonucleotide Array Sequence Analysis ; Biomarkers/metabolism ; Estrogen Receptor Modulators/pharmacology
    Chemical Substances Receptors, Estrogen ; Benzhydryl Compounds ; bisphenol A (MLT3645I99) ; Phenols ; Biomarkers ; Estrogen Receptor Modulators
    Language English
    Publishing date 2024-04-02
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 218799-1
    ISSN 1872-7786 ; 0009-2797
    ISSN (online) 1872-7786
    ISSN 0009-2797
    DOI 10.1016/j.cbi.2024.110952
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Depot-Specific Analysis of Human Adipose Cells and Their Responses to Bisphenol S.

    Peshdary, Vian / Styles, George / Gagné, Rémi / Yauk, Carole L / Sorisky, Alexander / Atlas, Ella

    Endocrinology

    2020  Volume 161, Issue 6

    Abstract: Exposure to endocrine-disrupting chemicals (EDCs) is associated with adverse health outcomes including obesity and diabetes. Obesity, and more specifically visceral obesity, is correlated with metabolic disease. The adipose tissue is an endocrine organ ... ...

    Abstract Exposure to endocrine-disrupting chemicals (EDCs) is associated with adverse health outcomes including obesity and diabetes. Obesity, and more specifically visceral obesity, is correlated with metabolic disease. The adipose tissue is an endocrine organ and a potential target for many environmental pollutants including bisphenols. The subcutaneous (Sc) and the omental (Om, visceral) depots are composed of mature adipocytes and residing progenitors, which may be different between the depots and may be EDCs targets. Bisphenol A (BPA) is a suspected metabolic disruptor, and is being replaced with structurally similar compounds such as bisphenol S (BPS). Like BPA, BPS induces adipogenesis in murine and primary human Sc preadipocytes. However, the effect of BPS on Om preadipocytes is not known. In this study, we show that human primary progenitors from Om depots have a distinct transcriptomic signature as compared to progenitors derived from donor-matched Sc depots. Furthermore, we show that BPS increases adipogenesis both of Om and Sc preadipocytes and can mimic the action of glucocorticoids or peroxisome proliferator-activated receptor γ (PPARγ) agonists. We also show that BPS treatment, at 0.1 µM and 25 µM, modifies the adipokine profiles both of Om- and Sc-derived adipocytes in a depot-specific manner. Taken together our data show distinct gene expression profiles in the Om vs Sc progenitors and similar responses to the BPA analogue, BPS.
    MeSH term(s) Adipocytes/cytology ; Adipocytes/drug effects ; Adipocytes/metabolism ; Adipogenesis/drug effects ; Adult ; Aged ; Animals ; Cells, Cultured ; Endocrine Disruptors/toxicity ; Female ; Humans ; Intra-Abdominal Fat/cytology ; Intra-Abdominal Fat/drug effects ; Intra-Abdominal Fat/metabolism ; Male ; Mice ; Middle Aged ; PPAR gamma/genetics ; PPAR gamma/metabolism ; Phenols/toxicity ; Stem Cells/cytology ; Stem Cells/drug effects ; Stem Cells/metabolism ; Subcutaneous Fat/cytology ; Subcutaneous Fat/drug effects ; Subcutaneous Fat/metabolism ; Sulfones/toxicity
    Chemical Substances Endocrine Disruptors ; PPAR gamma ; Phenols ; Sulfones ; bis(4-hydroxyphenyl)sulfone (80-09-1)
    Language English
    Publishing date 2020-03-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 427856-2
    ISSN 1945-7170 ; 0013-7227
    ISSN (online) 1945-7170
    ISSN 0013-7227
    DOI 10.1210/endocr/bqaa044
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Exposure to Low Doses of Dechlorane Plus Promotes Adipose Tissue Dysfunction and Glucose Intolerance in Male Mice.

    Peshdary, Vian / Styles, George / Rigden, Marc / Caldwell, Don / Kawata, Alice / Sorisky, Alexander / Atlas, Ella

    Endocrinology

    2020  Volume 161, Issue 8

    Abstract: The prevalence of type 2 diabetes (T2D) continues to increase worldwide. It is well established that genetic susceptibility, obesity, overnutrition and a sedentary life style are risk factors for the development of T2D. However, more recently, studies ... ...

    Abstract The prevalence of type 2 diabetes (T2D) continues to increase worldwide. It is well established that genetic susceptibility, obesity, overnutrition and a sedentary life style are risk factors for the development of T2D. However, more recently, studies have also proposed links between exposure to endocrine-disrupting chemicals (EDCs) and altered glucose metabolism. Human exposure to environmental pollutants that are suspected to have endocrine disruptor activity is ubiquitous. One such chemical is Dechlorane Plus (DP), a flame retardant, that is now detected in humans and the environment. Here we show that exposure of mice to low, environmentally relevant doses of DP promoted glucose intolerance in mice fed a high-fat diet independent of weight gain. Furthermore, DP had pronounced effects on the adipose tissue, where it induced the development of hypertrophied white adipose tissue (WAT), and increased serum levels of resistin, leptin, and plasminogen activator inhibitor-1. In addition, DP exposure induced "whitening" of brown adipose tissue (BAT), and reduced BAT uncoupling protein 1 expression. Importantly, some of these effects occurred even when the mice were fed a regular, low-fat, diet. Finally, WAT adipogenic markers were reduced with DP treatment in the WAT. We also show that DP directly inhibited insulin signaling in murine adipocytes and human primary subcutaneous adipocytes in vitro. Taken together, our results show that the exposure to low and environmentally relevant levels of DP may contribute to the development of T2D.
    MeSH term(s) 3T3-L1 Cells ; Adipose Tissue, White/drug effects ; Adipose Tissue, White/metabolism ; Adipose Tissue, White/physiopathology ; Adult ; Aged ; Animals ; Cells, Cultured ; Dose-Response Relationship, Drug ; Endocrine Disruptors/pharmacology ; Female ; Glucose Intolerance/chemically induced ; Glucose Intolerance/metabolism ; Glucose Intolerance/pathology ; Humans ; Hydrocarbons, Chlorinated/pharmacology ; Lipid Metabolism/drug effects ; Lipid Metabolism Disorders/chemically induced ; Lipid Metabolism Disorders/metabolism ; Lipid Metabolism Disorders/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Middle Aged ; Polycyclic Compounds/pharmacology ; Pregnancy
    Chemical Substances Endocrine Disruptors ; Hydrocarbons, Chlorinated ; Polycyclic Compounds ; dechlorane plus
    Language English
    Publishing date 2020-06-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 427856-2
    ISSN 1945-7170 ; 0013-7227
    ISSN (online) 1945-7170
    ISSN 0013-7227
    DOI 10.1210/endocr/bqaa096
    Database MEDical Literature Analysis and Retrieval System OnLINE

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