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:15Alkylation of DNA in male pre-meiotic germ cells leading to heritable mutationsGenetic DiseaseWPHA/WNT Endorsed0.25KE:155
Inadequate DNA repair
AOP:27Cholestatic Liver Injury induced by Inhibition of the Bile Salt Export Pump (ABCB11)Gastrointestinal System DiseaseUnder Development0.12KE:149
Increase, Inflammation
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:115Epithelial cytotoxicity leading to forestomach tumors (in mouse and rat)Cancer-0.2KE:149
Increase, Inflammation
AOP:136Intracellular Acidification Induced Olfactory Epithelial Injury Leading to Site of Contact Nasal TumorsBenign Neoplasm; Respiratory System DiseaseUnder Review0.14KE:768
Increase, Cytotoxicity
AOP:139Alkylation of DNA leading to cancer 1Cancer-0.25KE:155
Inadequate DNA repair
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:206Peroxisome proliferator-activated receptors γ inactivation leading to lung fibrosisMusculoskeletal System Disease; Respiratory System DiseaseUnder Development0.17KE:149
Increase, Inflammation
AOP:272Deposition of energy leading to lung cancerCancerWPHA/WNT Endorsed0.29KE:155
Inadequate DNA repair
KE:1636
Increase, Chromosomal aberrations
AOP:280α-diketone-induced bronchiolitis obliteransMusculoskeletal System Disease; Respiratory System Disease-0.14KE:149
Increase, Inflammation
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:303Frustrated phagocytosis-induced lung cancerCancerUnder Development0.14KE:1669
Increased, DNA damage and mutation
AOP:3055α-reductase inhibition leading to short anogenital distance (AGD) in male (mammalian) offspringUnclassifiedUnder Development0.2KE:1614
Decrease, androgen receptor activation
AOP:322Alkylation of DNA leading to reduced sperm countReproductive System Disease-0.2KE:155
Inadequate DNA repair
AOP:328Excessive reactive oxygen species production leading to mortality (2)Unclassified-0.2KE:1770
Decrease, Mitochondrial membrane potential
AOP:347Toll-like receptor 4 activation and peroxisome proliferator-activated receptor gamma inactivation leading to pulmonary fibrosisMusculoskeletal System Disease; Respiratory System Disease-0.11KE:1793
Activator protein 1 activation
AOP:362Immune mediated hepatitisGastrointestinal System Disease; Immune System Disease-0.12KE:1633
Increase in inflammation
AOP:387Deposition of ionising energy leading to population decline via mitochondrial dysfunctionReproductive System Disease-0.12KE:1770
Decrease, Mitochondrial membrane potential
AOP:397Bulky DNA adducts leading to mutationsGenetic DiseaseUnder Development0.33KE:155
Inadequate DNA repair
AOP:409Frustrated phagocytosis leads to malignant mesotheliomaCancer-0.12KE:1669
Increased, DNA damage and mutation
AOP:416Aryl hydrocarbon receptor activation leading to lung cancer through IL-6 toxicity pathwayCancer-0.17KE:1669
Increased, DNA damage and mutation
AOP:417Aryl hydrocarbon receptor activation leading to lung cancer through AHR-ARNT toxicity pathwayCancer-0.2KE:1669
Increased, DNA damage and mutation
AOP:420Aryl hydrocarbon receptor activation leading to lung cancer through sustained NRF2 toxicity pathwayCancer-0.25KE:1917
Altered gene expression, NRF2 dependent antioxidant pathway
AOP:432Deposition of Energy by Ionizing Radiation leading to Acute Myeloid LeukemiaHematopoietic System Disease; Cancer-0.09KE:155
Inadequate DNA repair
AOP:439Activation of the AhR leading to metastatic breast cancerThoracic Disease; CancerUnder Development0.11KE:149
Increase, Inflammation
AOP:446PM-related Adverse outcome pathway frameworks on various systemsRespiratory System Disease-0.05KE:149
Increase, Inflammation
AOP:451Interaction with lung resident cell membrane components leads to lung cancerCancer-0.11KE:1669
Increased, DNA damage and mutation
AOP:460Antagonism of Smoothened receptor leading to orofacial cleftingUnclassifiedUnder Development0.11KE:2043
Decrease, Sonic Hedgehog second messenger production
AOP:463The AOP framwork on silica nanopariticles induced hepatoxicityGastrointestinal System Disease-0.09KE:149
Increase, Inflammation
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 Review0.2KE:155
Inadequate DNA repair
KE:1636
Increase, Chromosomal aberrations
AOP:491Decrease, GLI1/2 target gene expression leads to orofacial cleftingUnclassifiedUnder Development0.17KE:2043
Decrease, Sonic Hedgehog second messenger production
AOP:493ERa inactivation alters AT expansion and functions and leads to insulin resistance and metabolically unhealthy obesityAcquired Metabolic Disease-0.1KE:1633
Increase in inflammation
AOP:505Reactive Oxygen Species (ROS) formation leads to cancer via inflammation pathwayCancer-0.2KE:149
Increase, Inflammation
AOP:525Reduced oligodendrocyte differentiation during neurodevelopment leading to impaired learning and memoryDevelopmental Disorder Of Mental Health-0.08KE:1656
Antagonism, Thyroid Receptor
AOP:531VEGFR inhibition leading to Keratinocyte differentiation-associate Hand-foot skin reactionUnclassified-0.12KE:11005
Hyperkeratosis
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 Endorsed0.4KE:155
Inadequate DNA repair
KE:1636
Increase, Chromosomal aberrations

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: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 Development0.5KE: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:443DNA damage and mutations leading to Metastatic Breast CancerThoracic Disease; CancerUnder Development0.3KE:1669
Increased, DNA damage and mutation
KE:1554
Increase Chromosomal Aberrations
KE:155
Inadequate DNA repair
AOP:447Kidney failure induced by inhibition of mitochondrial electron transfer chain through apoptosis, inflammation and oxidative stress pathwaysUrinary System Disease-0.25KE:1917
Altered gene expression, NRF2 dependent antioxidant pathway
KE:1633
Increase in inflammation
KE:1770
Decrease, Mitochondrial membrane potential
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

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.