Heptachlor


Associated AOPs with Level of Relevance - 1 AOPs with at least 1 KE associated with chemical, where the KE(s) are neither MIE nor AO

AOP Identifier AOP Title AO Classification OECD Status Taxonomic applicability Coverage Score The fraction of KEs within the AOP, that are mapped to the chemical-associated toxicological endpoints. KE Identifier KE Name
AOP:7Aromatase (Cyp19a1) reduction leading to impaired fertility in adult femaleReproductive system disease; Endocrine system disease; Reproductive system diseaseUnder ReviewRat, Mouse, Human0.4KE:219Reduction, Plasma 17beta-estradiol concentrations
KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:23Androgen receptor agonism leading to reproductive dysfunction (in repeat-spawning fish)UnclassifiedWPHA/WNT EndorsedPimephales promelas0.2KE:219Reduction, Plasma 17beta-estradiol concentrations
KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:25Aromatase inhibition leading to reproductive dysfunctionUnclassifiedWPHA/WNT EndorsedFathead minnow, Medaka, Zebrafish0.25KE:219Reduction, Plasma 17beta-estradiol concentrations
KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:37PPARα activation leading to hepatocellular adenomas and carcinomas in rodentsCancer; Gastrointestinal system diseaseUnder DevelopmentMouse, Rat0.2KE:716Increase, cell proliferation (hepatocytes)
AOP:39Covalent Binding, Protein, leading to Increase, Allergic Respiratory Hypersensitivity ResponseRespiratory system diseaseUnder DevelopmentHuman, Mouse0.2KE:272Activation/Proliferation, T-cells
AOP:40Covalent Protein binding leading to Skin SensitisationIntegumentary system diseaseWPHA/WNT EndorsedMouse, Human0.2KE:272Activation/Proliferation, T-cells
AOP:64Glucocorticoid Receptor (GR) Mediated Adult Leydig Cell Dysfunction Leading to Decreased Male FertilityReproductive system disease-Rattus norvegicus0.14KE:520Decreased sperm quantity or quality in the adult, Decreased fertility
AOP:77Nicotinic acetylcholine receptor activation contributes to abnormal foraging and leads to colony death/failure 1Unclassified-Honey bee0.14KE:341Impairment, Learning and memory
AOP:78Nicotinic acetylcholine receptor activation contributes to abnormal role change within the worker bee caste leading to colony death failure 1Unclassified-Honey bee0.12KE:341Impairment, Learning and memory
AOP:87Nicotinic acetylcholine receptor activation contributes to abnormal foraging and leads to colony loss/failureUnclassified-Honey bee0.12KE:341Impairment, Learning and memory
AOP:88Nicotinic acetylcholine receptor activation contributes to abnormal foraging and leads to colony loss/failure via abnormal role change within casteUnclassified-Honey bee0.14KE:341Impairment, Learning and memory
AOP:89Nicotinic acetylcholine receptor activation followed by desensitization contributes to abnormal foraging and directly leads to colony loss/failureUnclassified-Honey bee0.12KE:341Impairment, Learning and memory
AOP:90Nicotinic acetylcholine receptor activation contributes to abnormal roll change within the worker bee caste leading to colony loss/failure 2Unclassified-Honey bee0.12KE:341Impairment, Learning and memory
AOP:96Axonal sodium channel modulation leading to acute mortalityUnclassified-Insects, Fish0.17KE:602Increased, Ataxia, paralysis, or hyperactivity
AOP:99Histamine (H2) receptor antagonism leading to reduced survivalUnclassified-Zebrafish0.14KE:341Impairment, Learning and memory
AOP:107Constitutive androstane receptor activation leading to hepatocellular adenomas and carcinomas in the mouse and the ratCancer; Gastrointestinal system diseaseUnder ReviewRattus norvegicus, Mus musculus0.2KE:716Increase, cell proliferation (hepatocytes)
AOP:110Inhibition of iodide pump activity leading to follicular cell adenomas and carcinomas (in rat and mouse)Cancer; Endocrine system disease-Rattus norvegicus, Mus musculus0.14KE:739Increase, Hypertrophy and proliferation (follicular cell)
AOP:112Increased dopaminergic activity leading to endometrial adenocarcinomas (in Wistar rat)Reproductive system disease; Cancer-Rattus norvegicus0.17KE:749Decreased, Progesterone from corpus luteum
AOP:113Glutamate-gated chloride channel activation leading to acute mortalityUnclassified-Bombus impatiens, Chaetanaphothrips orchidii, Radopholus similis, Daphnia magna, Orius insidiosus, Hymenoptera, Helicoverpa zea, Lepidoptera, Liriomyza trifolii, Orius isidiosus, Acyrthosiphon kondoi0.17KE:764N/A, Ataxia, paralysis, or hyperactivity
AOP:114HPPD inhibition leading to corneal papillomas and carcinomas (in rat)Cancer-Rattus norvegicus0.17KE:778Increase, Regenerative cell proliferation (corneal cells)
AOP:115Epithelial cytotoxicity leading to forestomach tumors (in mouse and rat)Cancer-Mus musculus, Rattus norvegicus0.2KE:781Increase, Regenerative cell proliferation (forestomach epithelial cells)
AOP:117Androgen receptor activation leading to hepatocellular adenomas and carcinomas (in mouse and rat)Cancer; Gastrointestinal system diseaseUnder DevelopmentMus musculus, Rattus norvegicus0.25KE:716Increase, cell proliferation (hepatocytes)
AOP:118Chronic cytotoxicity leading to hepatocellular adenomas and carcinomas (in mouse and rat)Cancer; Gastrointestinal system disease-Mus musculus, Rattus norvegicus0.25KE:787Increase, Regenerative cell proliferation (hepatocytes)
AOP:119Inhibition of thyroid peroxidase leading to follicular cell adenomas and carcinomas (in rat and mouse)Cancer; Endocrine system disease-Rattus norvegicus, Mus musculus0.14KE:739Increase, Hypertrophy and proliferation (follicular cell)
AOP:121Urinary bladder calculi leading to urothelial papillomas and carcinomas (in mouse and rat)Cancer; Urinary system disease-Mus musculus, Rattus norvegicus0.2KE:795Increase, Regenerative cell proliferation (urothelial cells)
AOP:122Prolyl hydroxylase inhibition leading to reproductive dysfunction via increased HIF1 heterodimer formationUnclassified-Pimephales promelas0.2KE:219Reduction, Plasma 17beta-estradiol concentrations
KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:123Unknown MIE leading to reproductive dysfunction via increased HIF-1alpha transcriptionUnclassified-Pimephales promelas0.18KE:219Reduction, Plasma 17beta-estradiol concentrations
KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:136Intracellular Acidification Induced Olfactory Epithelial Injury Leading to Site of Contact Nasal TumorsBenign neoplasm; Respiratory system diseaseUnder Review0.14KE:870Increase, Cell Proliferation
AOP:164Beta-2 adrenergic agonist activity leading to mesovarian leiomyomas in the rat and mouseCancer; Reproductive system disease-CD-1 mouse, SD rat0.17KE:1042Proliferation/Clonal Expansion, smooth muscle
AOP:167Early-life estrogen receptor activity leading to endometrial carcinoma in the mouse.Reproductive system disease; Cancer-Mouse, Homo sapiens0.14KE:1067Proliferation/Clonal Expansion, aberrant basal cells
AOP:263Uncoupling of oxidative phosphorylation leading to growth inhibition via decreased cell proliferationUnclassifiedWPHA/WNT EndorsedZebrafish, Mouse, Rat, Lemna minor, Human, Caenorhabditis elegans0.25KE:1821Decrease, Cell proliferation
AOP:267Uncoupling of oxidative phosphorylation leading to growth inhibition via glucose depletionUnclassifiedUnder Development0.2KE:1821Decrease, Cell proliferation
AOP:271Inhibition of thyroid peroxidase leading to impaired fertility in fishUnclassifiedUnder DevelopmentFish0.2KE:219Reduction, Plasma 17beta-estradiol concentrations
AOP:272Deposition of energy leading to lung cancerCancerWPHA/WNT EndorsedHuman, Rat, Mouse0.14KE:870Increase, Cell Proliferation
AOP:274Histone deacetylase inhibition leads to impeded craniofacial developmentMusculoskeletal system disease-0.25KE:1558Collagen production, reduced
AOP:286Mitochondrial complex III antagonism leading to growth inhibition (1)Unclassified-Lemna minor, Daphnia magna, Danio rerio0.25KE:1821Decrease, Cell proliferation
AOP:289Inhibition of 5α-reductase leading to impaired fecundity in female fishUnclassifiedUnder DevelopmentFish0.17KE:219Reduction, Plasma 17beta-estradiol concentrations
AOP:290Mitochondrial ATP synthase antagonism leading to growth inhibition (1)Unclassified-Daphnia magna0.25KE:1821Decrease, Cell proliferation
AOP:297Inhibition of retinaldehyde dehydrogenase leads to population declineUnclassifiedUnder DevelopmentFish0.17KE:1643Altered, Visual function
AOP:303Frustrated phagocytosis-induced lung cancerCancerUnder DevelopmentMammals0.14KE:870Increase, Cell Proliferation
AOP:309Luteinizing hormone receptor antagonism leading to reproductive dysfunctionUnclassified-Fish0.29KE:1693Reduction, Plasma progesterone concentration
KE:1692Reduction, Progesterone synthesis
AOP:310Embryonic Activation of the AHR leading to Reproductive failure, via epigenetic down-regulation of GnRHRUnclassified-Zebrafish0.17KE:219Reduction, Plasma 17beta-estradiol concentrations
KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:331Excessive reactive oxygen species leading to growth inhibition via oxidative DNA damage and reduced cell proliferationUnclassified-Daphnia magna, Daphnia middendorffiana, Daphnia pulex, Daphnia pulicaria, Daphnia parvula0.17KE:1821Decrease, Cell proliferation
AOP:332Excessive reactive oxygen species leading to growth inhibition via lipid peroxidation and reduced cell proliferationUnclassified-0.2KE:1821Decrease, Cell proliferation
AOP:333Excessive reactive oxygen species leading to growth inhibition via uncoupling of oxidative phosphorylationUnclassified-0.2KE:1821Decrease, Cell proliferation
AOP:335AOP for urothelial carcinogenesis due to chemical cytotoxicity by mitochondrial impairmentCancer; Urinary system disease-Rat0.2KE:795Increase, Regenerative cell proliferation (urothelial cells)
AOP:346Aromatase inhibition leads to male-biased sex ratio via impacts on gonad differentiationUnclassifiedWPHA/WNT EndorsedZebrafish, Oreochromis niloticus, Chinook salmon, Fathead minnow, European sea bass0.2KE:1789Reduction, 17beta-estradiol synthesis by the undifferentiated gonad
AOP:363Thyroperoxidase inhibition leading to altered visual function via altered retinal layer structureUnclassifiedUnder ReviewZebrafish0.12KE:1643Altered, Visual function
AOP:364Thyroperoxidase inhibition leading to altered visual function via decreased eye sizeUnclassifiedUnder Development0.12KE:1643Altered, Visual function
AOP:365Thyroperoxidase inhibition leading to altered visual function via altered photoreceptor patterningUnclassifiedUnder Development0.12KE:1643Altered, Visual function
AOP:399Inhibition of Fyna leading to increased mortality via decreased eye size (Microphthalmos)Unclassified-Zebrafish0.25KE:1821Decrease, Cell proliferation
KE:1643Altered, Visual function
AOP:409Frustrated phagocytosis leads to malignant mesotheliomaCancer-0.12KE:870Increase, Cell Proliferation
AOP:414Aryl hydrocarbon receptor activation leading to lung fibrosis through TGF-β dependent fibrosis toxicity pathwayMusculoskeletal system disease; Respiratory system disease-0.2KE:1920Altered gene expression, TGF-β dependent fibrosis pathway
AOP:419Aryl hydrocarbon receptor activation leading to impaired lung function through P53 toxicity pathwayRespiratory system disease-0.25KE:1923Altered gene expression, P53 dependent apoptosis pathway
AOP:420Aryl hydrocarbon receptor activation leading to lung cancer through sustained NRF2 toxicity pathwayCancer-0.25KE:870Increase, Cell Proliferation
AOP:439Activation of the AhR leading to metastatic breast cancerThoracic disease; CancerUnder DevelopmentHumans, Mice0.11KE:1971Increased, tumor growth
AOP:450Inhibition of AChE and activation of CYP2E1 leading to sensory axonal peripheral neuropathy and mortalityNervous system disease-Rattus norvegicus, Mus musculus, Homo sapiens0.14KE:1391Activation of Cyp2E1
AOP:451Interaction with lung resident cell membrane components leads to lung cancerCancer-Human0.11KE:870Increase, Cell Proliferation
AOP:460Antagonism of Smoothened receptor leading to orofacial cleftingUnclassifiedUnder DevelopmentMouse0.11KE:1821Decrease, Cell proliferation
AOP:478Deposition of energy leading to occurrence of cataractsNervous system disease; Monogenic diseaseUnder ReviewHuman, Mouse, Rat, Rhesus monkeys, Rabbit, Guinea pig0.1KE:870Increase, Cell Proliferation
AOP:491Decrease, GLI1/2 target gene expression leads to orofacial cleftingUnclassifiedUnder DevelopmentMouse0.17KE:1821Decrease, Cell proliferation
AOP:496Androgen receptor agonism leading to reproduction dysfunction (in zebrafish)Unclassified-Zebrafish0.1KE:219Reduction, Plasma 17beta-estradiol concentrations
AOP:524Gluten-driven immune activation leading to celiac disease in genetically predisposed individualsImmune system disease; Gastrointestinal system disease-Human0.11KE:2255Innate immune response, activation
AOP:540Oxidative Stress in the Fish Ovary Leads to Reproductive Impairment via Reduced Vitellogenin ProductionUnclassified-0.11KE:3Reduction, 17beta-estradiol synthesis by ovarian granulosa cells
AOP:549Aromatase inhibition leads to reproductive toxicity (including growth and developmental toxicity) in adult female zebrafishUnclassified-0.12KE:219Reduction, Plasma 17beta-estradiol concentrations

Associated AOPs with Level of Relevance - 2 AOPs with at least 1 AO associated with chemical, and no associated MIE

AOP Identifier AOP Title AO Classification OECD Status Taxonomic applicability Coverage Score The fraction of KEs within the AOP, that are mapped to the chemical-associated toxicological endpoints. KE Identifier KE Name
AOP:12Chronic binding of antagonist to N-methyl-D-aspartate receptors (NMDARs) during brain development leads to neurodegeneration with impairment in learning and memory in agingNervous system disease; Developmental disorder of mental healthWPHA/WNT EndorsedMonkey, Rat, Human, Mouse, Zebrafish0.12KE:341Impairment, Learning and memory
AOP:13Chronic binding of antagonist to N-methyl-D-aspartate receptors (NMDARs) during brain development induces impairment of learning and memory abilitiesDevelopmental disorder of mental healthWPHA/WNT EndorsedHuman, Mouse, Monkey sp., Rat0.1KE:341Impairment, Learning and memory
AOP:17Binding of electrophilic chemicals to SH(thiol)-group of proteins and /or to seleno-proteins involved in protection against oxidative stress during brain development leads to impairment of learning and memoryDevelopmental disorder of mental healthWPHA/WNT EndorsedRat, Mouse, Human0.1KE:341Impairment, Learning and memory
AOP:48Binding of agonists to ionotropic glutamate receptors in adult brain causes excitotoxicity that mediates neuronal cell death, contributing to learning and memory impairment.Developmental disorder of mental healthWPHA/WNT EndorsedHuman, Mouse, Rat0.11KE:341Impairment, Learning and memory
AOP:54Inhibition of Na+/I- symporter (NIS) leads to learning and memory impairmentDevelopmental disorder of mental healthWPHA/WNT EndorsedHomo sapiens, Rattus sp.0.1KE:341Impairment, Learning and memory
AOP:139Alkylation of DNA leading to cancer 1Cancer-Homo sapiens, Mus musculus0.25KE:885Increase, Cancer
AOP:270Elevated ATP demand for detoxification and repair mechanisms leading to impaired locomotor activityUnclassified-0.12KE:10016Impaired locomotor activity
AOP:293Increased DNA damage leading to increased risk of breast cancerGenetic disease; Thoracic disease; CancerUnder DevelopmentRattus rattus, Mus musculus0.22KE:1193N/A, Breast Cancer
KE:1182Increase, Cell Proliferation (Epithelial Cells)
AOP:294Increased reactive oxygen and nitrogen species (RONS) leading to increased risk of breast cancerGenetic disease; Thoracic disease; CancerUnder Development0.22KE:1193N/A, Breast Cancer
KE:1182Increase, Cell Proliferation (Epithelial Cells)
AOP:322Alkylation of DNA leading to reduced sperm countReproductive system disease-0.2KE:1757Reduce, Sperm count
AOP:431Increased tumor necrosis factor (TNF) leading to increased risk of gestational diabetes mellitus (GDM)Inherited metabolic disorder-Human0.2KE:1953Gestational diabetes mellitus
AOP:432Deposition of Energy by Ionizing Radiation leading to Acute Myeloid LeukemiaHematopoietic system disease; Cancer-Homo sapiens, Mus musculus0.18KE:1955Acute Myeloid Leukemia
KE:870Increase, Cell Proliferation
AOP:463The AOP framwork on silica nanopariticles induced hepatoxicityGastrointestinal system disease-0.09KE:2034liver dysfunction
AOP:474Succinate dehydrogenase inactivation leads to cancer by promoting EMTCancerUnder DevelopmentHuman and other cells in culture0.2KE:885Increase, Cancer
AOP:475Binding of chemicals to ionotropic glutamate receptors leads to impairment of learning and memory via loss of drebrin from dendritic spines of neuronsDevelopmental disorder of mental healthUnder DevelopmentMouse, Rat, Human, Caenorhabditis elegans0.12KE:341Impairment, Learning and memory
AOP:483Deposition of Energy Leading to Learning and Memory ImpairmentDevelopmental disorder of mental healthUnder ReviewMouse, Rat, Rabbit, Dog, Pigs, Cow, Human0.12KE:341Impairment, Learning and memory
AOP:490Co-activation of IP3R and RyR leads to reduced IQ through non-cholinergic mechanismsDevelopmental disorder of mental health-0.18KE:2121decreased, Intellectual Quotient
KE:341Impairment, Learning and memory
AOP:495Androgen receptor activation leading to prostate cancerReproductive system disease; Cancer-0.11KE:2135Prostate cancer
AOP:499Activation of MEK-ERK1/2 leads to deficits in learning and cognition via disrupted neurotransmitter releaseDevelopmental disorder of mental health-Rattus norvegicus, Mus musculus, Homo sapiens0.25KE:341Impairment, Learning and memory
AOP:500Activation of MEK-ERK1/2 leads to deficits in learning and cognition via ROS and apoptosisDevelopmental disorder of mental health-Rattus norvegicus, Mus musculus, Homo sapiens0.14KE:341Impairment, Learning and memory
AOP:505Reactive Oxygen Species (ROS) formation leads to cancer via inflammation pathwayCancer-Human, Mouse, Rat0.2KE:885Increase, Cancer
AOP:513Reactive Oxygen (ROS) formation leads to cancer via Peroxisome proliferation-activated receptor (PPAR) pathwayCancer-Human, Mouse, Rat0.2KE:885Increase, Cancer
AOP:520Retinoic acid receptor agonism during neurodevelopment leading to impaired learning and memoryDevelopmental disorder of mental health-Mouse, Rat, Human0.2KE:341Impairment, Learning and memory
AOP:525Reduced oligodendrocyte differentiation during neurodevelopment leading to impaired learning and memoryDevelopmental disorder of mental health-0.08KE:341Impairment, Learning and memory
AOP:533Retinoic acid receptor antagonism during neurodevelopment leading to impaired learning and memoryDevelopmental disorder of mental health-0.17KE:341Impairment, Learning and memory
AOP:534Succinate dehydrogenase (SDH) inhibition leads to cancer through oxidative stressCancer-Vertebrates0.17KE:885Increase, Cancer
AOP:535Binding and activation of GPER leading to learning and memory impairmentsDevelopmental disorder of mental health-Mouse, Human0.22KE:2233Decreased, ERαβ heterodimers
KE:341Impairment, Learning and memory
AOP:546Succinate dehydrogenase inactivation leads to cancer through hypoxic-like mechanismsCancer-Human and other cells in culture0.2KE:885Increase, Cancer
AOP:569Decreased DNA methylation of FAM50B/PTCHD3 leading to IQ loss of children via PI3K-Akt pathwayDevelopmental disorder of mental health-0.33KE:2121decreased, Intellectual Quotient
KE:2195Increase, CNS Neural cell death

Associated AOPs with Level of Relevance - 3 AOPs with at least 1 MIE associated with chemical, and no associated AO

AOP Identifier AOP Title AO Classification OECD Status Taxonomic applicability Coverage Score The fraction of KEs within the AOP, that are mapped to the chemical-associated toxicological endpoints. KE Identifier KE Name
AOP:8Upregulation of Thyroid Hormone Catabolism via Activation of Hepatic Nuclear Receptors, and Subsequent Adverse Neurodevelopmental Outcomes in MammalsNervous system diseaseUnder DevelopmentRat0.11KE:239Activation, Pregnane-X receptor, NR1l2
AOP:60NR1I2 (Pregnane X Receptor, PXR) activation leading to hepatic steatosisGastrointestinal system disease; Inherited metabolic disorder-0.08KE:245Activation, PXR/SXR
AOP:220Cyp2E1 Activation Leading to Liver CancerCancer; Gastrointestinal system diseaseWPHA/WNT EndorsedRodents, Homo sapiens0.2KE:1391Activation of Cyp2E1
AOP:517Pregnane X Receptor (PXR) activation leads to liver steatosisGastrointestinal system disease; Inherited metabolic disorder-Vertebrates0.2KE:239Activation, Pregnane-X receptor, NR1l2
AOP:545Activation, Pregnane-X receptor, NR1l2 leads to increased plasma low-density lipoprotein (LDL) cholesterol via increased cholesterol synthesisUnclassified-Mammals0.2KE:239Activation, Pregnane-X receptor, NR1l2
AOP:548Activation, Pregnane-X receptor, NR1l2 leads to increased plasma low-density lipoprotein (LDL) cholesterol via increased PCSK9 protein expressionUnclassified-Mammals0.2KE:239Activation, Pregnane-X receptor, NR1l2

Associated AOPs with Level of Relevance - 5 AOPs with at least 1 MIE and AO associated with chemical, and there exists a directed path between that MIE and AO

AOP Identifier AOP Title AO Classification OECD Status Taxonomic applicability Coverage Score The fraction of KEs within the AOP, that are mapped to the chemical-associated toxicological endpoints. KE Identifier KE Name
AOP:10Binding to the picrotoxin site of ionotropic GABA receptors leading to epileptic seizures in adult brainNervous system diseaseWPHA/WNT EndorsedHuman, Mouse, Rat, Bobwhite quail, Zebrafish1.0KE:669Reduction, Neuronal synaptic inhibition
KE:682Generation, Amplified excitatory postsynaptic potential (EPSP)
KE:667Binding at picrotoxin site, iGABAR chloride channel
KE:64Reduction, Ionotropic GABA receptor chloride channel conductance
KE:616Occurrence, A paroxysmal depolarizing shift
KE:613Occurrence, Epileptic seizure

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We have built a comprehensive resource which compiles potential endocrine disrupting chemicals (EDCs) based on the observed adverse effects or endocrine-mediated endpoints in published experiments on humans or rodents to support basic research. We are not responsible for any errors or omissions in the published research articles or supporting literature on potential EDCs compiled in this resource. Users are advised to exercise their own judgement on the weight of evidence for potential EDCs compiled in this resource. Importantly, our sole goal to build this resource on potential EDCs is to enable future basic research towards better understanding of the systems-level perturbations upon chemical exposure rather than influencing regulatory advice on chemical use.