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:42Inhibition of Thyroperoxidase and Subsequent Adverse Neurodevelopmental Outcomes in MammalsCognitive DisorderWPHA/WNT Endorsed0.12KE:277
Thyroid hormone synthesis, Decreased
AOP:54Inhibition of Na+/I- symporter (NIS) leads to learning and memory impairmentDevelopmental Disorder Of Mental HealthWPHA/WNT Endorsed0.1KE:277
Thyroid hormone synthesis, Decreased
AOP:110Inhibition of iodide pump activity leading to follicular cell adenomas and carcinomas (in rat and mouse)Cancer; Endocrine System Disease-0.14KE:277
Thyroid hormone synthesis, Decreased
AOP:119Inhibition of thyroid peroxidase leading to follicular cell adenomas and carcinomas (in rat and mouse)Cancer; Endocrine System Disease-0.14KE:277
Thyroid hormone synthesis, Decreased
AOP:134Sodium Iodide Symporter (NIS) Inhibition and Subsequent Adverse Neurodevelopmental Outcomes in MammalsCognitive Disorder-0.11KE:277
Thyroid hormone synthesis, Decreased
AOP:144Endocytic lysosomal uptake leading to liver fibrosisGastrointestinal System DiseaseUnder Review0.11KE:1494
Leukocyte recruitment/activation
AOP:159Thyroperoxidase inhibition leading to increased mortality via reduced anterior swim bladder inflationUnclassifiedWPHA/WNT Endorsed0.12KE:277
Thyroid hormone synthesis, Decreased
AOP:173Substance interaction with the pulmonary resident cell membrane components leading to pulmonary fibrosisMusculoskeletal System Disease; Respiratory System DiseaseWPHA/WNT Endorsed0.12KE:1497
Increased, recruitment of inflammatory cells
AOP:175Thyroperoxidase inhibition leading to altered amphibian metamorphosisUnclassified-0.25KE:277
Thyroid hormone synthesis, Decreased
AOP:176Sodium Iodide Symporter (NIS) Inhibition leading to altered amphibian metamorphosisUnclassified-0.2KE:277
Thyroid hormone synthesis, Decreased
AOP:188Iodotyrosine deiodinase (IYD) inhibition leading to altered amphibian metamorphosisUnclassified-0.2KE:277
Thyroid hormone synthesis, Decreased
AOP:192Pendrin inhibition leading to altered amphibian metamorphosisUnclassified-0.25KE:277
Thyroid hormone synthesis, Decreased
AOP:193Dual oxidase (DUOX) inhibition leading to altered amphibian metamorphosisUnclassified-0.25KE:277
Thyroid hormone synthesis, Decreased
AOP:194Hepatic nuclear receptor activation leading to altered amphibian metamorphosisUnclassified-0.17KE:295
Induction, Upregulation of glucuronyltransferase activity
AOP:271Inhibition of thyroid peroxidase leading to impaired fertility in fishUnclassifiedUnder Development0.2KE:277
Thyroid hormone synthesis, Decreased
AOP:288Inhibition of 17α-hydrolase/C 10,20-lyase (Cyp17A1) activity leads to birth reproductive defects (cryptorchidism) in male (mammals)Endocrine System Disease-0.12KE:1614
Decrease, androgen receptor activation
AOP:293Increased DNA damage leading to increased risk of breast cancerGenetic Disease; Thoracic Disease; CancerUnder Development0.11KE:1494
Leukocyte recruitment/activation
AOP:294Increased reactive oxygen and nitrogen species (RONS) leading to increased risk of breast cancerGenetic Disease; Thoracic Disease; CancerUnder Development0.11KE:1494
Leukocyte recruitment/activation
AOP:303Frustrated phagocytosis-induced lung cancerCancerUnder Development0.29KE:1669
Increased, DNA damage and mutation
KE:1497
Increased, recruitment of inflammatory cells
AOP:3055α-reductase inhibition leading to short anogenital distance (AGD) in male (mammalian) offspringUnclassifiedUnder Development0.2KE:1614
Decrease, androgen receptor activation
AOP:363Thyroperoxidase inhibition leading to altered visual function via altered retinal layer structureUnclassifiedUnder Review0.12KE:277
Thyroid hormone synthesis, Decreased
AOP:364Thyroperoxidase inhibition leading to altered visual function via decreased eye sizeUnclassifiedUnder Development0.12KE:277
Thyroid hormone synthesis, Decreased
AOP:365Thyroperoxidase inhibition leading to altered visual function via altered photoreceptor patterningUnclassifiedUnder Development0.12KE:277
Thyroid hormone synthesis, Decreased
AOP:392Decreased fibrinolysis and activated bradykinin system leading to hyperinflammationUnclassifiedUnder Development0.2KE:1497
Increased, recruitment of inflammatory cells
AOP:409Frustrated phagocytosis leads to malignant mesotheliomaCancer-0.25KE:1669
Increased, DNA damage and mutation
KE:1497
Increased, recruitment of inflammatory cells
AOP:446PM-related Adverse outcome pathway frameworks on various systemsRespiratory System Disease-0.15KE:18
Activation, AhR
KE:165
Activation, Long term AHR receptor driven direct and indirect gene expression changes
KE:1497
Increased, recruitment of inflammatory cells
AOP:451Interaction with lung resident cell membrane components leads to lung cancerCancer-0.22KE:1669
Increased, DNA damage and mutation
KE:1497
Increased, recruitment of inflammatory cells
AOP:457Succinate dehydrogenase inhibition leading to increased insulin resistance through reduction in circulating thyroxineInherited Metabolic Disorder-0.17KE:277
Thyroid hormone synthesis, Decreased
AOP:468Binding of SARS-CoV-2 to ACE2 leads to hyperinflammation (via cell death)Unclassified-0.12KE:1497
Increased, recruitment of inflammatory cells
AOP:493ERa inactivation alters AT expansion and functions and leads to insulin resistance and metabolically unhealthy obesityAcquired Metabolic Disease-0.1KE:1497
Increased, recruitment of inflammatory cells

No associated AOPs with Level of Relevance 2

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 Development0.22KE:295
Induction, Upregulation of glucuronyltransferase activity
KE:239
Activation, Pregnane-X receptor, NR1l2
AOP:19Androgen receptor antagonism leading to adverse effects in the male foetus (mammals)Reproductive System Disease-0.2KE:26
Antagonism, Androgen receptor
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:60NR1I2 (Pregnane X Receptor, PXR) activation leading to hepatic steatosisGastrointestinal System Disease; Inherited Metabolic Disorder-0.08KE:245
Activation, PXR/SXR
AOP:111Decrease in androgen receptor activity leading to Leydig cell tumors (in rat)Cancer; Reproductive System Disease-0.2KE:1614
Decrease, androgen receptor activation
AOP:128Kidney dysfunction by decreased thyroid hormoneUrinary System DiseaseUnder Development0.09KE:277
Thyroid hormone synthesis, Decreased
AOP:131Aryl hydrocarbon receptor activation leading to uroporphyriaInherited Metabolic DisorderWPHA/WNT Endorsed0.33KE:18
Activation, AhR
KE:850
Induction, CYP1A2/CYP1A5
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:306Androgen receptor (AR) antagonism leading to short anogenital distance (AGD) in male (mammalian) offspringUnclassifiedUnder Development0.5KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
AOP:310Embryonic Activation of the AHR leading to Reproductive failure, via epigenetic down-regulation of GnRHRUnclassified-0.08KE:18
Activation, AhR
AOP:344Androgen receptor (AR) antagonism leading to nipple retention (NR) in male (mammalian) offspringUnclassifiedUnder Development0.5KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
AOP:345Androgen receptor (AR) antagonism leading to decreased fertility in femalesEndocrine System Disease; Reproductive System Disease; Reproductive System DiseaseUnder Development0.33KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
AOP:372Androgen receptor antagonism leading to testicular cancerEndocrine System Disease; Reproductive System Disease; Cancer-0.4KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
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-0.2KE:18
Activation, AhR
AOP:416Aryl hydrocarbon receptor activation leading to lung cancer through IL-6 toxicity pathwayCancer-0.33KE:18
Activation, AhR
KE:1669
Increased, DNA damage and mutation
AOP:417Aryl hydrocarbon receptor activation leading to lung cancer through AHR-ARNT toxicity pathwayCancer-0.6KE:18
Activation, AhR
KE:17
Altered gene expression, AHR nuclear translocator (ARNT)-dependent pathway
KE:1669
Increased, DNA damage and mutation
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-0.25KE:18
Activation, AhR
AOP:439Activation of the AhR leading to metastatic breast cancerThoracic Disease; CancerUnder Development0.11KE:18
Activation, AhR
AOP:443DNA damage and mutations leading to Metastatic Breast CancerThoracic Disease; CancerUnder Development0.1KE:1669
Increased, DNA damage and mutation
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-0.25KE:18
Activation, AhR
KE:295
Induction, Upregulation of glucuronyltransferase activity
AOP:459AhR activation in the thyroid leading to Subsequent Adverse Neurodevelopmental Outcomes in MammalsCognitive Disorder-0.33KE:18
Activation, AhR
KE:277
Thyroid hormone synthesis, Decreased
KE:850
Induction, CYP1A2/CYP1A5
AOP:477Androgen receptor (AR) antagonism leading to hypospadias in male (mammalian) offspringPhysical Disorder-0.67KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
AOP:494AhR activation leading to liver fibrosisGastrointestinal System Disease-0.17KE:18
Activation, AhR
AOP:517Pregnane X Receptor (PXR) activation leads to liver steatosisGastrointestinal System Disease; Inherited Metabolic Disorder-0.2KE:239
Activation, Pregnane-X receptor, NR1l2
AOP:525Reduced oligodendrocyte differentiation during neurodevelopment leading to impaired learning and memoryDevelopmental Disorder Of Mental Health-0.23KE:2220
Antagonism, Glucocorticoid hormone receptor
KE:2217
Binding of antagonist to glucocorticoid hormone receptor
KE:2216
Binding of antagonist to thyroid hormone 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.