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Mutagenicity and Carcinogenicity01:25

Mutagenicity and Carcinogenicity

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Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
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Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
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Toxicity Testing in Animals01:23

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Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
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In-vitro Mutagenesis01:16

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To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
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Related Experiment Video

Updated: Mar 19, 2026

A Combined 3D Tissue Engineered In Vitro/In Silico Lung Tumor Model for Predicting Drug Effectiveness in Specific Mutational Backgrounds
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In Silico Methods for Carcinogenicity Assessment.

Azadi Golbamaki1, Emilio Benfenati2

  • 1Laboratory of Environmental Chemistry and Toxicology, Istituto di Ricerche Farmacologiche "Mario Negri", Via La Masa 19, 20156, Milano, Italy. azadi.golbamaki@marionegri.it.

Methods in Molecular Biology (Clifton, N.J.)
|June 18, 2016
PubMed
Summary
This summary is machine-generated.

Predicting chemical carcinogenicity is crucial for preventing environmentally induced cancers. Quantitative Structure-Activity Relationship (QSAR) models offer a promising alternative to animal testing for identifying potential carcinogens.

Keywords:
Applicability domain indexCarcinogenicityGenotoxicityIn silicoNon-genotoxicityQSARSARpyStructural alertsToxtree

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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents HPHC
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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents HPHC
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Area of Science:

  • Toxicology
  • Computational Chemistry
  • Drug Safety

Background:

  • Environmental factors contribute to cancer development.
  • Accurate prediction of chemical carcinogenicity is vital for public health.
  • Animal testing for carcinogenicity is ethically and practically challenging.

Purpose of the Study:

  • To review and describe prominent Quantitative Structure-Activity Relationship ((Q)SAR) models for predicting chemical carcinogenicity.
  • To evaluate the performance of selected (Q)SAR models.
  • To demonstrate the application of these models to pharmaceutical compounds.

Main Methods:

  • Review of established (Q)SAR models incorporating expert knowledge and statistical approaches.
  • Performance evaluation of selected predictive models.
  • Application of models to assess the carcinogenicity of pharmaceutical molecules.

Main Results:

  • Several (Q)SAR models based on expert knowledge and statistical methods were identified and described.
  • The performance of these models was systematically evaluated.
  • The predictive capabilities of the models were demonstrated through their application to pharmaceutical compounds.

Conclusions:

  • (Q)SAR models provide a valuable in silico approach for carcinogenicity assessment.
  • These models support the principles of the 3Rs (Replacement, Reduction, Refinement) in animal testing.
  • The evaluated models show potential for identifying carcinogenic risks in chemical and pharmaceutical development.