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:108Inhibition of pyruvate dehydrogenase kinase leading to hepatocellular adenomas and carcinomas (in mouse and rat)Cancer; Gastrointestinal System Disease-0.17KE:768
Increase, Cytotoxicity
AOP:112Increased dopaminergic activity leading to endometrial adenocarcinomas (in Wistar rat)Reproductive System Disease; Cancer-0.17KE:111
Agonism, Estrogen receptor
AOP:122Prolyl hydroxylase inhibition leading to reproductive dysfunction via increased HIF1 heterodimer formationUnclassified-0.1KE:800
Decreased, Aromatase (Cyp19a1) mRNA
AOP:123Unknown MIE leading to reproductive dysfunction via increased HIF-1alpha transcriptionUnclassified-0.09KE:800
Decreased, Aromatase (Cyp19a1) mRNA
AOP:136Intracellular Acidification Induced Olfactory Epithelial Injury Leading to Site of Contact Nasal TumorsBenign Neoplasm; Respiratory System DiseaseUnder Review0.14KE:768
Increase, Cytotoxicity
AOP:190Type II iodothyronine deiodinase (DIO2) inhibition leading to altered amphibian metamorphosisUnclassified-0.17KE:1829
Altered, Thyroid hormone-dependent gene expression
AOP:191Type III iodotyrosine deiodinase (DIO3) inhibition leading to altered amphibian metamorphosisUnclassified-0.5KE:1154
Increased, Triiodothyronine (T3) in tissues
KE:1829
Altered, Thyroid hormone-dependent gene expression
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:3055α-reductase inhibition leading to short anogenital distance (AGD) in male (mammalian) offspringUnclassifiedUnder Development0.4KE:1614
Decrease, androgen receptor activation
KE:286
Altered, Transcription of genes by the androgen receptor
AOP:419Aryl hydrocarbon receptor activation leading to impaired lung function through P53 toxicity pathwayRespiratory System Disease-0.25KE:1923
Altered gene expression, P53 dependent apoptosis pathway
AOP:441Ionizing radiation-induced DNA damage leads to microcephaly via apoptosis and premature cell differentiationCongenital Nervous System Abnormality; Nervous System Disease-0.14KE:1974
Activation of Tumor Protein 53
AOP:460Antagonism of Smoothened receptor leading to orofacial cleftingUnclassifiedUnder Development0.11KE:2043
Decrease, Sonic Hedgehog second messenger production
AOP:491Decrease, GLI1/2 target gene expression leads to orofacial cleftingUnclassifiedUnder Development0.17KE:2043
Decrease, Sonic Hedgehog second messenger production
AOP:495Androgen receptor activation leading to prostate cancerReproductive System Disease; Cancer-0.11KE:286
Altered, Transcription of genes by the androgen receptor
AOP:496Androgen receptor agonism leading to reproduction dysfunction (in zebrafish)Unclassified-0.1KE:286
Altered, Transcription of genes by the androgen receptor
AOP:525Reduced oligodendrocyte differentiation during neurodevelopment leading to impaired learning and memoryDevelopmental Disorder Of Mental Health-0.15KE:1656
Antagonism, Thyroid Receptor
KE:2220
Antagonism, Glucocorticoid hormone receptor

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:7Aromatase (Cyp19a1) reduction leading to impaired fertility in adult femaleReproductive System Disease; Endocrine System Disease; Reproductive System DiseaseUnder Review0.2KE:408
reduction in ovarian granulosa cells, Aromatase (Cyp19a1)
AOP:16Acetylcholinesterase inhibition leading to acute mortalityUnclassifiedUnder Development0.14KE:12
Acetylcholinesterase (AchE) Inhibition
AOP:19Androgen receptor antagonism leading to adverse effects in the male foetus (mammals)Reproductive System Disease-0.4KE:26
Antagonism, Androgen receptor
KE:286
Altered, Transcription of genes by the androgen receptor
AOP:25Aromatase inhibition leading to reproductive dysfunctionUnclassifiedWPHA/WNT Endorsed0.12KE:36
Inhibition, Aromatase
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:281Acetylcholinesterase Inhibition Leading to NeurodegenerationNervous System Disease-0.1KE:12
Acetylcholinesterase (AchE) Inhibition
AOP:300Thyroid Receptor Antagonism and Subsequent Adverse Neurodevelopmental Outcomes in MammalsCognitive DisorderUnder Development0.2KE:1656
Antagonism, Thyroid Receptor
AOP:306Androgen receptor (AR) antagonism leading to short anogenital distance (AGD) in male (mammalian) offspringUnclassifiedUnder Development0.75KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
KE:286
Altered, Transcription of genes by the androgen receptor
AOP:312Acetylcholinesterase Inhibition leading to Acute Mortality via Impaired Coordination & Movement​Unclassified-0.17KE:12
Acetylcholinesterase (AchE) Inhibition
AOP:344Androgen receptor (AR) antagonism leading to nipple retention (NR) in male (mammalian) offspringUnclassifiedUnder Development0.75KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
KE:286
Altered, Transcription of genes by the androgen receptor
AOP:345Androgen receptor (AR) antagonism leading to decreased fertility in femalesEndocrine System Disease; Reproductive System Disease; Reproductive System DiseaseUnder Development0.5KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
KE:286
Altered, Transcription of genes by the androgen receptor
AOP:346Aromatase inhibition leads to male-biased sex ratio via impacts on gonad differentiationUnclassifiedWPHA/WNT Endorsed0.2KE:36
Inhibition, Aromatase
AOP:372Androgen receptor antagonism leading to testicular cancerEndocrine System Disease; Reproductive System Disease; Cancer-0.6KE:1614
Decrease, androgen receptor activation
KE:26
Antagonism, Androgen receptor
KE:286
Altered, Transcription of genes by the androgen receptor
AOP:405Organo-Phosphate Chemicals induced inhibition of AChE leading to impaired cognitive functionCognitive Disorder-0.2KE:12
Acetylcholinesterase (AchE) Inhibition
AOP:450Inhibition of AChE and activation of CYP2E1 leading to sensory axonal peripheral neuropathy and mortalityNervous System Disease-0.14KE:12
Acetylcholinesterase (AchE) Inhibition
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:485Thyroid hormone antagonism leading to impaired oligodendrocyte maturation during development and subsequent decreased cognitionCognitive Disorder-0.14KE:1656
Antagonism, Thyroid Receptor
AOP:493ERa inactivation alters AT expansion and functions and leads to insulin resistance and metabolically unhealthy obesityAcquired Metabolic Disease-0.1KE:2126
Estrogen receptor alpha inactivation
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: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:549Aromatase inhibition leads to reproductive toxicity (including growth and developmental toxicity) in adult female zebrafishUnclassified-0.12KE:36
Inhibition, Aromatase
AOP:559Inhibition of acetylcholinesterase (AChE) leading to arrhythmiasSymptom-0.2KE:12
Acetylcholinesterase (AchE) Inhibition

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.