scholarly journals Machine Learning for Investigation on Endocrine-Disrupting Chemicals with Gestational Age and Delivery Time in a Longitudinal Cohort

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Hemi Luan ◽  
Hongzhi Zhao ◽  
Jiufeng Li ◽  
Yanqiu Zhou ◽  
Jing Fang ◽  
...  
Keyword(s):  
Machine Learning ◽  
Pregnant Women ◽  
Gestational Age ◽  
Endocrine Disrupting Chemicals ◽  
Environmental Chemicals ◽  
The Body ◽  
Delivery Time ◽  
Longitudinal Cohort ◽  
Endocrine Disrupting ◽  
Dynamic Concentration

Endocrine-disrupting chemicals (EDCs) are widespread environmental chemicals that are often considered as risk factors with weak activity on the hormone-dependent process of pregnancy. However, the adverse effects of EDCs in the body of pregnant women were underestimated. The interaction between dynamic concentration of EDCs and endogenous hormones (EHs) on gestational age and delivery time remains unclear. To define a temporal interaction between the EDCs and EHs during pregnancy, comprehensive, unbiased, and quantitative analyses of 33 EDCs and 14 EHs were performed for a longitudinal cohort with 2317 pregnant women. We developed a machine learning model with the dynamic concentration information of EDCs and EHs to predict gestational age with high accuracy in the longitudinal cohort of pregnant women. The optimal combination of EHs and EDCs can identify when labor occurs (time to delivery within two and four weeks, AUROC of 0.82). Our results revealed that the bisphenols and phthalates are more potent than partial EHs for gestational age or delivery time. This study represents the use of machine learning methods for quantitative analysis of pregnancy-related EDCs and EHs for understanding the EDCs’ mixture effect on pregnancy with potential clinical utilities.

Environmental exposures to endocrine disrupting chemicals (EDCs) and their role in endometriosis: a systematic literature review

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Diksha Sirohi ◽  
Ruqaiya Al Ramadhani ◽  
Luke D. Knibbs
Keyword(s):  
Bisphenol A ◽  
Phthalate Esters ◽  
Endocrine Disrupting Chemicals ◽  
Environmental Pollutants ◽  
Positive Association ◽  
Environmental Chemicals ◽  
Reproductive Age ◽  
Organochlorinated Pesticides ◽  
Endocrine Disrupting ◽  
The Relationship

AbstractPurposeEndocrine-related diseases and disorders are on the rise globally. Synthetically produced environmental chemicals (endocrine-disrupting chemicals (EDCs)) mimic hormones like oestrogen and alter signalling pathways. Endometriosis is an oestrogen-dependent condition, affecting 10–15% of women of the reproductive age, and has substantial impacts on the quality of life. The aetiology of endometriosis is believed to be multifactorial, ranging from genetic causes to immunologic dysfunction due to environmental exposure to EDCs. Hence, we undertook a systematic review and investigated the epidemiological evidence for an association between EDCs and the development of endometriosis. We also aimed to assess studies on the relationship between body concentration of EDCs and the severity of endometriosis.MethodFollowing PRISMA guidelines, a structured search of PubMed, Embase and Scopus was conducted (to July 2018). The included studies analysed the association between one or more EDCs and the prevalence of endometriosis. The types of EDCs, association and outcome, participant characteristics and confounding variables were extracted and analysed. Quality assessment was performed using standard criteria.ResultsIn total, 29 studies were included. Phthalate esters were positively associated with the prevalence of endometriosis. The majority (71%) of studies revealed a significant association between bisphenol A, organochlorinated environmental pollutants (dioxins, dioxin-like compounds, organochlorinated pesticides, polychlorinated biphenyls) and the prevalence of endometriosis. A positive association between copper, chromium and prevalence of endometriosis was demonstrated in one study only. Cadmium, lead and mercury were not associated with the prevalence of endometriosis. There were conflicting results for the association between nickel and endometriosis. The relationship of EDCs and severity of endometriosis was not established in the studies.ConclusionWe found some evidence to suggest an association between phthalate esters, bisphenol A, organochlorinated environmental pollutants and the prevalence of endometriosis. Disentangling these exposures from various other factors that affect endometriosis is complex, but an important topic for further research.

scholarly journals Epigenetic modifications associated with in utero exposure to endocrine disrupting chemicals BPA, DDT and Pb

2019 ◽  
Vol 34 (4) ◽  
pp. 309-325 ◽  
Author(s):  
Chinonye Doris Onuzulu ◽  
Oluwakemi Anuoluwapo Rotimi ◽  
Solomon Oladapo Rotimi
Keyword(s):  
Endocrine Disruptors ◽  
Endocrine Disrupting Chemicals ◽  
Endocrine System ◽  
Environmental Chemicals ◽  
Epigenetic Mechanisms ◽  
Epigenetic Alterations ◽  
Endocrine Disrupting ◽  
Non Coding Rnas ◽  
Hormone System ◽  
Developmental Windows

Abstract Endocrine disrupting chemicals (EDCs) are xenobiotics which adversely modify the hormone system. The endocrine system is most vulnerable to assaults by endocrine disruptors during the prenatal and early development window, and effects may persist into adulthood and across generations. The prenatal stage is a period of vulnerability to environmental chemicals because the epigenome is usually reprogrammed during this period. Bisphenol A (BPA), lead (Pb), and dichlorodiphenyltrichloroethane (DDT) were chosen for critical review because they have become serious public health concerns globally, especially in Africa where they are widely used without any regulation. In this review, we introduce EDCs and describe the various modes of action of EDCs and the importance of the prenatal and developmental windows to EDC exposure. We give a brief overview of epigenetics and describe the various epigenetic mechanisms: DNA methylation, histone modifications and non-coding RNAs, and how each of them affects gene expression. We then summarize findings from previous studies on the effects of prenatal exposure to the endocrine disruptors BPA, Pb and DDT on each of the previously described epigenetic mechanisms. We also discuss how the epigenetic alterations caused by these EDCs may be related to disease processes.

scholarly journals Virtual screening of potentially endocrine-disrupting chemicals against nuclear receptors and its application to identify PPARγ-bound fatty acids

2020 ◽  
Author(s):  
Chaitanya K. Jaladanki ◽  
Yang He ◽  
Li Na Zhao ◽  
Sebastian Maurer-Stroh ◽  
Lit-Hsin Loo ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Virtual Screening ◽  
Nuclear Receptors ◽  
Endocrine Disrupting Chemicals ◽  
Screening Method ◽  
The Body ◽  
Cyclopropane Fatty Acid ◽  
Peroxisome Proliferator ◽  
Endocrine Disrupting ◽  
Multiple Structures

Abstract Nuclear receptors (NRs) are key regulators of energy homeostasis, body development, and sexual reproduction. Xenobiotics binding to NRs may disrupt natural hormonal systems and induce undesired adverse effects in the body. However, many chemicals of concerns have limited or no experimental data on their potential or lack-of-potential endocrine-disrupting effects. Here, we propose a virtual screening method based on molecular docking for predicting potential endocrine-disrupting chemicals (EDCs) that bind to NRs. For 12 NRs, we systematically analyzed how multiple crystal structures can be used to distinguish actives and inactives found in previous high-throughput experiments. Our method is based on (i) consensus docking scores from multiple structures at a single functional state (agonist-bound or antagonist-bound), (ii) multiple functional states (agonist-bound and antagonist-bound), and (iii) multiple pockets (orthosteric site and alternative sites) of these NRs. We found that the consensus enrichment from multiple structures is better than or comparable to the best enrichment from a single structure. The discriminating power of this consensus strategy was further enhanced by a chemical similarity-weighted scoring scheme, yielding better or comparable enrichment for all studied NRs. Applying this optimized method, we screened 252 fatty acids against peroxisome proliferator-activated receptor gamma (PPARγ) and successfully identified 3 previously unknown fatty acids with Kd = 100–250 μM including two furan fatty acids: furannonanoic acid (FNA) and furanundecanoic acid (FUA), and one cyclopropane fatty acid: phytomonic acid (PTA). These results suggested that the proposed method can be used to rapidly screen and prioritize potential EDCs for further experimental evaluations.

scholarly journals FACTORS RELATED TO ANEMIA IN PREGNANT WOMEN EVENTS IN GENERAL HOSPITAL REGIONAL dr. ZAINOEL ABIDIN

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Faradilla Safitri ◽  
Mizan Jalinan
Keyword(s):  
At Risk ◽  
Pregnant Women ◽  
General Hospital ◽  
Gestational Age ◽  
Univariate Analysis ◽  
The Body ◽  
Bivariate Analysis ◽  
Blood Disorder ◽  
The Relationship ◽  
Education Work

Anemia is a common blood disorder that occurs when levels of red bloodcells in the body becomes too low. Data from Riskesdas the year 2013 thenumber of pregnant women suffer from anemia as much as 37.1%, this isvery different to the incidence of anemia among pregnant women in theDistrict General Hospital dr. Zainoel Abidin with a very low percentage of2.9% to 3.4%. To analyze the relationship between age, parity, education,occupation, gestational age, origin of a referral, and health servicesResearch methodsThis type of research is analytic survey using casecontrol design. Univariate analysis found women with anemia 33.3% andanemia not as much as 66.7%. Bivariate analysis between age <20 yearswith anemia (p = 0.001, OR = 9.549), parity (p = 0.001, OR = 1.955),gestational age (p = 0.027, OR = 1.608), education (p = 0.002, OR =2.338), occupation (p = 0.006, OR = 2.167). Results of multivariateanalysis the dominant variable is the age of the OR (age> 35 years =9.009 and aged <20 years = 6.994). No correlation between age, parity,gestational age, education, work with anemia among pregnant women. allpregnant women at risk for anemia, pregnant women should routinely visitantenatal care, because the mother will get information about thenutritional needs during pregnancy and other factors that can lead toanemia during pregnancy.Keywords: Anemia, age, education, gestational age, parity

scholarly journals Pemanfataan Serbuk Sekam Padi Sebagai Adsorben Untuk Menurunkan Konsentrasi Senyawa Piridaben Pada Pestisida Samite 135EC

2018 ◽  
Vol 2 (2) ◽  
pp. 42-53
Author(s):  
Roni Saputra
Keyword(s):  
Rice Husk ◽  
Contact Time ◽  
Negative Impact ◽  
Endocrine Disrupting Chemicals ◽  
Absorption Efficiency ◽  
The Body ◽  
Sample Treatment ◽  
Metabolic System ◽  
Environment And Health ◽  
Endocrine Disrupting

Pesticides are very useful in many areas of human activities, especially in agriculture to ensure food availability. However, pesticides also have a negative impact on the environment and health. Pesticides are classified as endocrine disrupting chemicals (EDCs), which are chemicals that can interfere with the metabolic system, binding and eliminating hormones in the body, one of which is the danger of carcinogenicity. The concentration hazard present in Pesticide was experiment to decrease the concentration by using rice husk absorbent powder. This research is an experimental research that aims to reduce the concentration of pyridaben compounds contained in pesticides by using rice husk absorbent powder. By varying the sample treatment, variations of optimum concentrations of 10, 20, 30, 40 and 50 mg/L, contact time of 12 hours, 24 hours, 2 days, 4 days and 7 days, and weight of rice husk powder 25, 50, 100, 150, 200 mg. Analysis performed on pesticides is the content of pyridaben in pestisida samite 135EC.             From this research, the best result was obtained at concentration 30 mg/L with 29,74% absorption efficiency, 24 hours contact time with 92,36% absorption efficiency, and 150 mg of rice husk powder with 54,88% absorption efficiency. This condition indicates that rice husk powders are effectively used to decrease the concentration of pyridaben compounds because of their effectiveness above 50%.

scholarly journals Development of a Human Estrogen Receptor Dimerization Assay for the Estrogenic Endocrine-Disrupting Chemicals Using Bioluminescence Resonance Energy Transfer

2021 ◽  
Vol 18 (16) ◽  
pp. 8875
Author(s):  
Hye Mi Kim ◽  
Hyeyeong Seo ◽  
Yooheon Park ◽  
Hee-Seok Lee ◽  
Seok-Hee Lee ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Binding Affinity ◽  
Binding Assay ◽  
Radioligand Binding ◽  
Endocrine Disrupting Chemicals ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
The Body ◽  
Bioluminescence Resonance Energy Transfer ◽  
Endocrine Disrupting

Endocrine-disrupting chemicals (EDCs) are found in food and various other substances, including pesticides and plastics. EDCs are easily absorbed into the body and have the ability to mimic or block hormone function. The radioligand binding assay based on the estrogen receptors binding affinity is widely used to detect estrogenic EDCs but is limited to radioactive substances and requires specific conditions. As an alternative, we developed a human cell-based dimerization assay for detecting EDC-mediated ER-alpha (ERα) dimerization using bioluminescence resonance energy transfer (BRET). The resultant novel BRET-based on the ERα dimerization assay was used to identify the binding affinity of 17β-estradiol (E2), 17α-estradiol, corticosterone, diethylhexyl phthalate, bisphenol A, and 4-nonylphenol with ERα by measuring the corresponding BRET signals. Consequently, the BRET signals from five chemicals except corticosterone showed a dose-dependent sigmoidal curve for ERα, and these chemicals were suggested as positive chemicals for ERα. In contrast, corticosterone, which induced a BRET signal comparable to that of the vehicle control, was suggested as a negative chemical for ERα. Therefore, these results were consistent with the results of the existing binding assay for ERα and suggested that a novel BRET system can provide information about EDCs-mediated dimerization to ERα.

Foods, exposures, and lifestyle risk factors in pregnancy and breastfeeding

2015 ◽  
Author(s):  
Sir Peter Gluckman ◽  
Mark Hanson ◽  
Chong Yap Seng ◽  
Anne Bardsley
Keyword(s):  
Pregnant Women ◽  
Endocrine Disrupting Chemicals ◽  
Evidence Base ◽  
Predatory Fish ◽  
Environmental Toxicants ◽  
Lifestyle Risk Factors ◽  
Endocrine Disrupting ◽  
Polycyclic Aromatic ◽  
Lifestyle Risk ◽  
Foodborne Infections

Advice for pregnant women on food avoidance, dangerous exposures, and inappropriate behaviours abounds on the internet and through various information sources. This chapter reviews the evidence base for such advice and clarifies issues where common advice is not supported by credible data. Foods containing potential teratogens, mutagens, or toxicants that need consideration include liver (high vitamin A), some herbal teas, contaminated grains, predatory fish, caffeine-containing foods, and various sources of foodborne infections. Exposure to environmental toxicants such as lead, pesticides, herbicides, polycyclic aromatic hydrocarbons, bisphenol-A, and other endocrine-disrupting chemicals should be avoided, as should alcohol consumption and cigarette smoking. Restrictive diets and unusual dietary cravings (pica) need to be properly managed. Evidence for harm from personal care products is generally weak, but pregnant women may choose to avoid some unnecessary exposures.

Endocrine Disruptors and Other Environmental Influences on Hormone Action

2019 ◽  
pp. 85-106
Author(s):  
Laura N. Vandenberg
Keyword(s):  
Endocrine Disrupting Chemicals ◽  
Consumer Products ◽  
Environmental Chemicals ◽  
Laboratory Animals ◽  
Hormone Action ◽  
Hormone Synthesis ◽  
Endocrine Disrupting ◽  
Dose Effects ◽  
History Of

Endocrine-disrupting chemicals (EDCs) interfere with hormone action by altering hormone synthesis, secretion, transport in the blood, binding to receptors, metabolism, or excretion. This chapter reviews the history of EDCs and other environmental chemicals, methods used to identify EDCs, and common uses for these chemicals in consumer products. It also describes major principles of endocrinology and how these features influence the actions of EDCs. This chapter will also evaluate controversies in the study and regulation of EDCs, including the concept of “low dose effects,” the question of whether humans are exposed to EDCs at levels that can cause harm, and the determination of “safe” doses of exposure. Finally, this chapter reviews other environmental factors that can influence the health of laboratory animals and interfere with the study of EDCs.

scholarly journals Exposure to Endocrine Disrupting Chemicals and Risk of Breast Cancer

2020 ◽  
Vol 21 (23) ◽  
pp. 9139
Author(s):  
Louisane Eve ◽  
Béatrice Fervers ◽  
Muriel Le Romancer ◽  
Nelly Etienne-Selloum
Keyword(s):  
Breast Cancer ◽  
Mammary Gland ◽  
Disease Incidence ◽  
Endocrine Disrupting Chemicals ◽  
Epidemiological Studies ◽  
Environmental Chemicals ◽  
Endocrine Disrupting ◽  
Carcinogenic Effects ◽  
The Many

Breast cancer (BC) is the second most common cancer and the fifth deadliest in the world. Exposure to endocrine disrupting pollutants has been suggested to contribute to the increase in disease incidence. Indeed, a growing number of researchershave investigated the effects of widely used environmental chemicals with endocrine disrupting properties on BC development in experimental (in vitro and animal models) and epidemiological studies. The complex effects of endocrine disrupting chemicals (EDCs) on hormonal pathways, involving carcinogenic effects and an increase in mammary gland susceptibility to carcinogenesis—together with the specific characteristics of the mammary gland evolving over the course of life and the multifactorial etiology of BC—make the evaluation of these compounds a complex issue. Among the many EDCs suspected of increasing the risk of BC, strong evidence has only been provided for few EDCs including diethylstilbestrol, dichlorodiphenyltrichloroethane, dioxins and bisphenol A. However, given the ubiquitous nature and massive use of EDCs, it is essential to continue to assess their long-term health effects, particularly on carcinogenesis, to eradicate the worst of them and to sensitize the population to minimize their use.

Endocrine Disruptors in the Environment

2014 ◽  
Author(s):  
Nancy Langston
Keyword(s):  
World War Ii ◽  
New Technologies ◽  
Endocrine Disrupting Chemicals ◽  
Environmental Chemicals ◽  
Pharmaceutical Drugs ◽  
Industrial Chemicals ◽  
World War ◽  
Synthetic Chemicals ◽  
Endocrine Disrupting ◽  
Post War

Since World War II, the production of synthetic chemicals has increased more than 30-fold due to the post-war boom in petrochemical exploration, manufacture, and marketing. The modern chemical industry, now a global enterprise of $2 trillion annually, is central to the world economy, as it generates millions of jobs and consumes vast quantities of energy and raw materials. Today, more than 70,000 different industrial chemicals are synthesized and sold each year (Chandler 2005; McCoy et al. 2006). New technologies and methods for the detection of these synthetic chemicals have drawn increasing attention to the pervasive and persistent presence of hormone-disrupting chemicals in our lives. Hormones—the chemicals that deliver messages throughout the body in order to coordinate physical processes—are deeply sensitive to external interference, and the consequences of such interference are becoming ever more apparent. In July 2005, the Centers for Disease Control (2005) released its Third National Report on Human Exposure to Environmental Chemicals, revealing that industrial chemicals now permeate bodies and ecosystems. Many of these chemicals can interfere with the body’s hormonal signaling system (called the endocrine system), and many persistently resist the metabolic processes that bind and break down natural hormones. More than 358 industrial chemicals and pesticides have been detected in the cord blood of minority American infants (Environmental Working Group 2009). Accumulating data suggests that reproductive problems are also increasing across a broad range of animals, from Great Lakes fish to people. Many researchers suspect that the culprits are environmental exposures to synthetic chemicals that disrupt hormonal signals, particularly in the developing fetus. Endocrine-disrupting chemicals are not rare; they include the most common synthetic chemicals in production, such as many pesticides, plastics, and pharmaceutical drugs. Since World War II, synthetic endocrine-disrupting chemicals have permeated bodies and ecosystems throughout the globe, potentially with profound health and ecological effects (Krimsky 2000). Hormones are chemical signals that regulate communication among cells and organs, thus orchestrating a complex process of fetal development that relies on precise dosage and timing.

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