Associated High Confidence AOPs
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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 Coverage Score KE Identifier KE Name
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 Endorsed0.1KE:1493
Increased Pro-inflammatory mediators
AOP:27Cholestatic Liver Injury induced by Inhibition of the Bile Salt Export Pump (ABCB11)Gastrointestinal System DiseaseUnder Development0.12KE:149
Increase, Inflammation
AOP:38Protein Alkylation leading to Liver FibrosisGastrointestinal System DiseaseWPHA/WNT Endorsed0.14KE:1493
Increased Pro-inflammatory mediators
AOP:39Covalent Binding, Protein, leading to Increase, Allergic Respiratory Hypersensitivity ResponseRespiratory System DiseaseUnder Development0.2KE:1496
Increased, secretion of proinflammatory mediators
AOP:112Increased dopaminergic activity leading to endometrial adenocarcinomas (in Wistar rat)Reproductive System Disease; Cancer-0.17KE:111
Agonism, Estrogen receptor
AOP:115Epithelial cytotoxicity leading to forestomach tumors (in mouse and rat)Cancer-0.2KE:149
Increase, Inflammation
AOP:144Endocytic lysosomal uptake leading to liver fibrosisGastrointestinal System DiseaseUnder Review0.22KE:1494
Leukocyte recruitment/activation
KE:1493
Increased Pro-inflammatory mediators
AOP:167Early-life estrogen receptor activity leading to endometrial carcinoma in the mouse.Reproductive System Disease; Cancer-0.14KE:1065
Activation, estrogen receptor alpha
AOP:173Substance interaction with the pulmonary resident cell membrane components leading to pulmonary fibrosisMusculoskeletal System Disease; Respiratory System DiseaseWPHA/WNT Endorsed0.25KE:1497
Increased, recruitment of inflammatory cells
KE:1496
Increased, secretion of proinflammatory mediators
AOP:206Peroxisome proliferator-activated receptors γ inactivation leading to lung fibrosisMusculoskeletal System Disease; Respiratory System DiseaseUnder Development0.17KE:149
Increase, Inflammation
AOP:237Substance interaction with lung resident cell membrane components leading to atherosclerosisCardiovascular System DiseaseUnder Development0.2KE:1496
Increased, secretion of proinflammatory mediators
AOP:272Deposition of energy leading to lung cancerCancerWPHA/WNT Endorsed0.14KE:1636
Increase, Chromosomal aberrations
AOP:280α-diketone-induced bronchiolitis obliteransMusculoskeletal System Disease; Respiratory System Disease-0.14KE:149
Increase, Inflammation
AOP:293Increased DNA damage leading to increased risk of breast cancerGenetic Disease; Thoracic Disease; CancerUnder Development0.22KE:1494
Leukocyte recruitment/activation
KE:1493
Increased Pro-inflammatory mediators
AOP:294Increased reactive oxygen and nitrogen species (RONS) leading to increased risk of breast cancerGenetic Disease; Thoracic Disease; CancerUnder Development0.22KE:1494
Leukocyte recruitment/activation
KE:1493
Increased Pro-inflammatory mediators
AOP:303Frustrated phagocytosis-induced lung cancerCancerUnder Development0.14KE:1497
Increased, recruitment of inflammatory cells
AOP:320Binding of SARS-CoV-2 to ACE2 receptor leading to acute respiratory distress associated mortalityUnclassifiedUnder Development0.22KE:1750
Increased inflammatory immune responses
KE:1496
Increased, secretion of proinflammatory mediators
AOP:362Immune mediated hepatitisGastrointestinal System Disease; Immune System Disease-0.12KE:1633
Increase in inflammation
AOP:379Binding to ACE2 leading to thrombosis and disseminated intravascular coagulationCardiovascular System DiseaseUnder Development0.14KE:1845
Coagulation
AOP:382Angiotensin II type 1 receptor (AT1R) agonism leading to lung fibrosisMusculoskeletal System Disease; Respiratory System DiseaseUnder Development0.33KE:1496
Increased, secretion of proinflammatory mediators
KE:1172
Increased activation, Nuclear factor kappa B (NF-kB)
AOP:409Frustrated phagocytosis leads to malignant mesotheliomaCancer-0.25KE:1497
Increased, recruitment of inflammatory cells
KE:1496
Increased, secretion of proinflammatory mediators
AOP:432Deposition of Energy by Ionizing Radiation leading to Acute Myeloid LeukemiaHematopoietic System Disease; Cancer-0.09KE:1493
Increased Pro-inflammatory mediators
AOP:440Hypothalamus estrogen receptors activity suppression leading to ovarian cancer via ovarian epithelial cell hyperplasiaBenign Neoplasm; Endocrine System Disease; Reproductive System Disease; Reproductive System Disease; Cancer; Endocrine System DiseaseUnder Development0.11KE:1973
Increased, estrogens
AOP:443DNA damage and mutations leading to Metastatic Breast CancerThoracic Disease; CancerUnder Development0.2KE:1554
Increase Chromosomal Aberrations
KE:1172
Increased activation, Nuclear factor kappa B (NF-kB)
AOP:451Interaction with lung resident cell membrane components leads to lung cancerCancer-0.22KE:1497
Increased, recruitment of inflammatory cells
KE:1496
Increased, secretion of proinflammatory mediators
AOP:452Adverse outcome pathway of PM-induced respiratory toxicityRespiratory System Disease-0.09KE:2009
Activation of inflammation pathway
AOP:463The AOP framwork on silica nanopariticles induced hepatoxicityGastrointestinal System Disease-0.09KE:149
Increase, Inflammation
AOP:465Alcohol dehydrogenase leading to reproductive dysfunctionUnclassified-0.12KE:748
Increased, Estrogen receptor (ER) activity
AOP:468Binding of SARS-CoV-2 to ACE2 leads to hyperinflammation (via cell death)Unclassified-0.25KE:1497
Increased, recruitment of inflammatory cells
KE:1496
Increased, secretion of proinflammatory mediators
AOP:470Deposition of energy leads to abnormal vascular remodelingCardiovascular System DiseaseUnder Review0.12KE:1493
Increased Pro-inflammatory mediators
AOP:472DNA adduct formation leading to kidney failureUrinary System Disease-0.11KE:149
Increase, Inflammation
AOP:478Deposition of energy leading to occurrence of cataractsNervous System Disease; Monogenic DiseaseUnder Review0.1KE:1636
Increase, Chromosomal aberrations
AOP:483Deposition of Energy Leading to Learning and Memory ImpairmentDevelopmental Disorder Of Mental HealthUnder Review0.12KE:2097
Increase, Pro-Inflammatory Mediators
AOP:505Reactive Oxygen Species (ROS) formation leads to cancer via inflammation pathwayCancer-0.2KE:149
Increase, Inflammation
AOP:507Nrf2 inhibition leading to vascular disrupting effects via inflammation pathwayCardiovascular System Disease-0.17KE:2009
Activation of inflammation pathway
AOP:511The AOP framework on ROS-mediated oxidative stress induced vascular disrupting effectsCardiovascular System Disease-0.06KE:2009
Activation of inflammation pathway
AOP:541Excessive ROS generation leading to increased incidence of vascular calcification by VSMC phenotype switchingCardiovascular System Disease-0.15KE:1493
Increased Pro-inflammatory mediators
KE:2009
Activation of inflammation pathway
AOP:544Inhibition of neuropathy target esterase leading to delayed neuropathy via increased inflammationNervous System Disease-0.17KE:149
Increase, Inflammation

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 Coverage Score KE Identifier KE Name
AOP:296Oxidative DNA damage leading to chromosomal aberrations and mutationsGenetic Disease; Chromosomal DiseaseWPHA/WNT Endorsed0.2KE:1636
Increase, Chromosomal aberrations
AOP:504SULT1E1 inhibition leading to uterine adenocarcinoma via increased estrogen availability at target organ levelUnclassified-0.33KE:1065
Activation, estrogen receptor alpha
AOP:561Aromatase induction leading to estrogen receptor alpha activation via increased estradiolUnclassified-0.2KE:1065
Activation, estrogen receptor alpha

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 Coverage Score 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 Development0.11KE:239
Activation, Pregnane-X receptor, NR1l2
AOP:21Aryl hydrocarbon receptor activation leading to early life stage mortality, via increased COX-2UnclassifiedWPHA/WNT Endorsed0.2KE:18
Activation, AhR
AOP:41Sustained AhR Activation leading to Rodent Liver TumoursCancer; Gastrointestinal System DiseaseUnder Review0.2KE:165
Activation, Long term AHR receptor driven direct and indirect gene expression changes
AOP:131Aryl hydrocarbon receptor activation leading to uroporphyriaInherited Metabolic DisorderWPHA/WNT Endorsed0.17KE:18
Activation, AhR
AOP:150Aryl hydrocarbon receptor activation leading to early life stage mortality, via reduced VEGFUnclassifiedWPHA/WNT Endorsed0.14KE:18
Activation, AhR
AOP:151AhR activation leading to preeclampsiaCardiovascular System DiseaseUnder Development0.14KE:18
Activation, AhR
AOP:310Embryonic Activation of the AHR leading to Reproductive failure, via epigenetic down-regulation of GnRHRUnclassified-0.08KE:18
Activation, AhR
AOP:392Decreased fibrinolysis and activated bradykinin system leading to hyperinflammationUnclassifiedUnder Development0.6KE:1866
Fibrinolysis, decreased
KE:1497
Increased, recruitment of inflammatory cells
KE:1496
Increased, secretion of proinflammatory mediators
AOP:414Aryl hydrocarbon receptor activation leading to lung fibrosis through TGF-β dependent fibrosis toxicity pathwayMusculoskeletal System Disease; Respiratory System Disease-0.2KE:18
Activation, AhR
AOP:415Aryl hydrocarbon receptor activation leading to lung fibrosis through IL-6 toxicity pathwayMusculoskeletal System Disease; Respiratory System Disease-0.4KE:18
Activation, AhR
KE:1921
Altered gene expression, NF-kB dependent Interleukin-6 pathway
AOP:416Aryl hydrocarbon receptor activation leading to lung cancer through IL-6 toxicity pathwayCancer-0.33KE:18
Activation, AhR
KE:1921
Altered gene expression, NF-kB dependent Interleukin-6 pathway
AOP:417Aryl hydrocarbon receptor activation leading to lung cancer through AHR-ARNT toxicity pathwayCancer-0.4KE:18
Activation, AhR
KE:17
Altered gene expression, AHR nuclear translocator (ARNT)-dependent pathway
AOP:418Aryl hydrocarbon receptor activation leading to impaired lung function through AHR-ARNT toxicity pathwayRespiratory System Disease-0.4KE:18
Activation, AhR
KE:17
Altered gene expression, AHR nuclear translocator (ARNT)-dependent pathway
AOP:419Aryl hydrocarbon receptor activation leading to impaired lung function through P53 toxicity pathwayRespiratory System Disease-0.25KE:18
Activation, AhR
AOP:420Aryl hydrocarbon receptor activation leading to lung cancer through sustained NRF2 toxicity pathwayCancer-0.5KE:18
Activation, AhR
KE:1917
Altered gene expression, NRF2 dependent antioxidant pathway
AOP:439Activation of the AhR leading to metastatic breast cancerThoracic Disease; CancerUnder Development0.22KE:18
Activation, AhR
KE:149
Increase, Inflammation
AOP:445Estrogen Receptor Alpha Agonism leads to Impaired ReproductionReproductive System Disease-0.12KE:1065
Activation, estrogen receptor alpha
AOP:446PM-related Adverse outcome pathway frameworks on various systemsRespiratory System Disease-0.3KE:18
Activation, AhR
KE:149
Increase, Inflammation
KE:151
Activation, Inflammatory cytokines, chemokines, cytoprotective gene pathways
KE:1496
Increased, secretion of proinflammatory mediators
KE:165
Activation, Long term AHR receptor driven direct and indirect gene expression changes
KE:1497
Increased, recruitment of inflammatory cells
AOP:447Kidney failure induced by inhibition of mitochondrial electron transfer chain through apoptosis, inflammation and oxidative stress pathwaysUrinary System Disease-0.17KE:1917
Altered gene expression, NRF2 dependent antioxidant pathway
KE:1633
Increase in inflammation
AOP:448ROS, inflammation, and activation of nAChR lead to increased incidence of cardiovascular morbidity and mortalityCardiovascular System Disease-0.06KE:151
Activation, Inflammatory cytokines, chemokines, cytoprotective gene pathways
AOP:455Aryl hydrocarbon receptor activation leading to early life stage mortality via sox9 repression induced impeded craniofacial developmentMusculoskeletal System DiseaseUnder Review0.17KE:18
Activation, AhR
AOP:456Aryl hydrocarbon receptor activation leading to early life stage mortality via sox9 repression induced cardiovascular toxicityUnclassifiedUnder Review0.17KE:18
Activation, AhR
AOP:458AhR activation in the liver leading to Subsequent Adverse Neurodevelopmental Outcomes in MammalsCognitive Disorder-0.12KE:18
Activation, AhR
AOP:459AhR activation in the thyroid leading to Subsequent Adverse Neurodevelopmental Outcomes in MammalsCognitive Disorder-0.11KE:18
Activation, AhR
AOP:493ERa inactivation alters AT expansion and functions and leads to insulin resistance and metabolically unhealthy obesityAcquired Metabolic Disease-0.3KE:2126
Estrogen receptor alpha inactivation
KE:1497
Increased, recruitment of inflammatory cells
KE:1633
Increase in inflammation
AOP:494AhR activation leading to liver fibrosisGastrointestinal System Disease-0.17KE:18
Activation, AhR
AOP:497ERa inactivation alters mitochondrial functions and insulin signalling in skeletal muscle and leads to insulin resistance and metabolic syndromeInherited Metabolic Disorder; Disease Of Metabolism-0.12KE:2126
Estrogen receptor alpha inactivation
AOP:503Activation of uterine estrogen receptor-alfa leading to endometrial adenocarcinoma, via epigenetic modulationReproductive System Disease; CancerUnder Review0.17KE:1065
Activation, estrogen receptor alpha
AOP:517Pregnane X Receptor (PXR) activation leads to liver steatosisGastrointestinal System Disease; Inherited Metabolic Disorder-0.2KE:239
Activation, Pregnane-X receptor, NR1l2
AOP:536Estrogen receptor agonism leading to reduced survival and population growth due to renal failureUnclassified-0.17KE:111
Agonism, Estrogen receptor
AOP:537Estrogen receptor agonism leads to reduced fecundity via increased vitellogenin in the liverUnclassified-0.2KE:111
Agonism, Estrogen receptor
AOP:545Activation, Pregnane-X receptor, NR1l2 leads to increased plasma low-density lipoprotein (LDL) cholesterol via increased cholesterol synthesisUnclassified-0.2KE:239
Activation, Pregnane-X receptor, NR1l2
AOP:548Activation, Pregnane-X receptor, NR1l2 leads to increased plasma low-density lipoprotein (LDL) cholesterol via increased PCSK9 protein expressionUnclassified-0.2KE:239
Activation, Pregnane-X receptor, NR1l2
AOP:563Aryl hydrocarbon Receptor (AHR) activation causes Premature Ovarian Insufficiency via Bax mediated apoptosisReproductive System Disease; Endocrine System Disease-0.17KE:18
Activation, AhR

No associated AOPs with Level of Relevance 5
Glossary of Terms

AOP
Adverse Outcome Pathway
MIE
Molecular Initiating Event
KE
Key Event
AO
Adverse Outcome
Coverage score
The fraction of KEs within the AOP, that are mapped to the chemical-associated toxicological endpoints
Level of relevance
Qualitative rank based on the kind of associated KEs within the corresponding AOP
AO classification
The disease category corresponding to the AO in the AOP obtained from Disease Ontology
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DISCLAIMER

TICToK is a knowledgebase of chemicals found in tattoo inks, compiled from publicly available regulatory and scientific resources. The chemical classifications presented in this knowledgebase are derived from multiple publicly available resources and are provided solely for informational purposes, and they are neither authoritative nor binding. The chemical-AOP mappings compiled in this knowledgebase serve as plausible hypotheses for research, and further experimental validation is required to definitively establish these potential toxicity mechanisms. The authors bear no responsibility for any errors, omissions, or inconsistencies originating from these external sources. Users are advised to exercise independent judgment when interpreting chemical classifications and any other data provided in this resource. Importantly, our sole goal to build this resource on tattoo ink chemicals is to enable future basic research on this topic, and it does not necessarily reflect the views or objectives of our employers or funders.