Arylamine N-Acetyltransferase Functional Genetics and Cancer Risk

Arylamine N-acetyltransferases (NATs) are phase II enzymes that catalyse the acetylation of arylamines and related substrates, playing a pivotal role in both detoxification and bioactivation of carcinogens. Two major isoforms, NAT1 and NAT2, exhibit genetic polymorphisms that give rise to distinct acetylation phenotypes—commonly described as “rapid” or “slow” acetylators. These variations influence individual susceptibility to chemically induced DNA damage, modulate the efficacy and toxicity of chemotherapeutic agents, and correlate with cancer incidence across diverse populations. Functional genetic studies have demonstrated that particular NAT alleles can enhance the activation of procarcinogens, leading to adduct formation and mutagenesis, while altered expression of NAT1 in tumour tissue has been associated with metabolic reprogramming and patient prognosis. The integration of NAT genotype and expression profiling holds promise for refining risk stratification, guiding lifestyle and occupational interventions, and optimising drug dosing in precision oncology.

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Arylamine N-Acetyltransferase Functional Genetics and Cancer Risk publication trend

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Technical terms

Aryl amines: Organic compounds containing an amino group directly bonded to an aromatic ring, many of which are environmental carcinogens.

Phase II metabolism: Biotransformation reactions that conjugate xenobiotics with endogenous substrates, enhancing solubility and excretion.

Polymorphism: A common genetic variation in DNA sequence that may alter gene function or expression.

Acetylation phenotype: Classification of individuals as rapid or slow acetylators based on NAT enzyme activity determined by genotype.

Bioactivation: Metabolic conversion of a procarcinogen into a reactive species capable of damaging cellular macromolecules.

Reactive oxygen species (ROS): Highly reactive molecules derived from oxygen that can induce oxidative damage to DNA, proteins and lipids.

References

1. NAT2 global landscape: Genetic diversity and acetylation statuses from a systematic review. PLOS ONE (2023).
2. Bioactivation, Mutagenicity, DNA Damage, and Oxidative Stress Induced by 3,4-Dimethylaniline. Biomolecules (2024).
3. NAT2 activity increases cytotoxicity of anthracycline antibiotics and HDAC inhibitors. Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease (2025).
4. Arylamine N-acetyltransferase 1 expression predicts glucose dependence and mitochondrial bioenergetics in cancer cells. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research (2025).