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:18PPARα activation in utero leading to impaired fertility in malesReproductive System DiseaseUnder Review0.12KE:289
Decrease, Translocator protein (TSPO)
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:136Intracellular Acidification Induced Olfactory Epithelial Injury Leading to Site of Contact Nasal TumorsBenign Neoplasm; Respiratory System DiseaseUnder Review0.14KE:768
Increase, Cytotoxicity
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:272Deposition of energy leading to lung cancerCancerWPHA/WNT Endorsed0.14KE:1636
Increase, Chromosomal aberrations
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 Development0.2KE:1614
Decrease, androgen receptor activation
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 Development0.1KE:1554
Increase Chromosomal Aberrations
AOP:460Antagonism of Smoothened receptor leading to orofacial cleftingUnclassifiedUnder Development0.11KE:2043
Decrease, Sonic Hedgehog second messenger production
AOP:465Alcohol dehydrogenase leading to reproductive dysfunctionUnclassified-0.12KE:748
Increased, Estrogen receptor (ER) activity
AOP:478Deposition of energy leading to occurrence of cataractsNervous System Disease; Monogenic DiseaseUnder Review0.1KE:1636
Increase, Chromosomal aberrations
AOP:491Decrease, GLI1/2 target gene expression leads to orofacial cleftingUnclassifiedUnder Development0.17KE:2043
Decrease, Sonic Hedgehog second messenger production

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:19Androgen receptor antagonism leading to adverse effects in the male foetus (mammals)Reproductive System Disease-0.2KE:26
Antagonism, Androgen receptor
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: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: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:445Estrogen Receptor Alpha Agonism leads to Impaired ReproductionReproductive System Disease-0.12KE:1065
Activation, estrogen receptor alpha
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:503Activation of uterine estrogen receptor-alfa leading to endometrial adenocarcinoma, via epigenetic modulationReproductive System Disease; CancerUnder Review0.17KE:1065
Activation, estrogen receptor alpha
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

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.