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[DNA damages caused by paracetamol]
1Seksjon for produkttoksikologi Avdeling for Miljømedisin Statens Institutt for Folkehelse, Oslo.
Abstract:
Studies on cells in vitro and animal experiments show that paracetamol may bind covalently to DNA, inhibit DNA-replication and DNA-repair synthesis, and cause chromosomal aberrations in somatic cells. In two studies a higher level of chromosomal aberrations was found in lymphocytes after exposure of human volunteers to therapeutic doses of paracetamol, but in a third study the results were negative. Genotoxic effects of paracetamol have been demonstrated both in vitro and in vivo at or near therapeutic concentrations. Overall, the data indicate that paracetamol-use may contribute to an increase in the total burden of DNA-damage in man. Higher risk of cancer after exposure to paracetamol has not been demonstrated in epidemiological studies, nor has increased risk of cancer been unequivocally documented from animal experiments. It is generally accepted, however, that exposure that may cause DNA-damage in man should be reduced and if possible avoided. The therapeutic benefit of using paracetamol should therefore be carefully evaluated, taking into consideration its potential for inducing acute and chronic and genotoxic effects.
Insights
Paracetamol may damage DNA and cause genetic mutations, raising concerns about its long-term use. While cancer risks aren't proven, minimizing exposure to genotoxic substances like paracetamol is advised.
Area of Science:
- Toxicology
- Molecular Biology
- Genetics
Context:
- Paracetamol (acetaminophen) is a widely used analgesic and antipyretic.
- Previous research has explored its potential cellular and genetic effects.
Purpose:
- To evaluate the genotoxic potential of paracetamol.
- To assess the implications of paracetamol-induced DNA damage.
Summary:
- In vitro and animal studies indicate paracetamol can bind to DNA, inhibit DNA replication and repair, and cause chromosomal aberrations.
- Human volunteer studies show mixed results regarding chromosomal aberrations in lymphocytes at therapeutic doses.
- Genotoxic effects have been observed both in vitro and in vivo near therapeutic concentrations, suggesting paracetamol use may increase overall DNA damage burden.
Impact:
- While epidemiological studies have not demonstrated an increased cancer risk, the potential for DNA damage warrants careful consideration.
- The therapeutic benefits of paracetamol should be weighed against its genotoxic effects.
- Reducing exposure to DNA-damaging agents like paracetamol is generally recommended.