Related Experiment Video

Updated: Jun 5, 2026

Use of Frozen Tissue in the Comet Assay for the Evaluation of DNA Damage
11:30

Use of Frozen Tissue in the Comet Assay for the Evaluation of DNA Damage

Published on: March 24, 2020

Genotoxicity of sodium metabisulfite in mouse tissues evaluated by the comet assay and the micronucleus test

Ivana M C M M Carvalho1, Ana A C Melo Cavalcante, Alisson F Dantas

  • 1Programa de Pós-Graduação em Genética e Toxicologia Aplicada-Universidade Luterana do Brasil, Canoas, RS, Brazil.

Mutation Research
|December 28, 2010
PubMed

Insights

Sodium metabisulfite (SMB), used in food and pharmaceuticals, showed genotoxic effects in mice at high doses. Further research is needed to understand the genotoxic risk of SMB in different tissues.

Area of Science:

  • Toxicology
  • Genetics

Background:

  • Sodium metabisulfite (SMB) is a common additive in food and pharmaceuticals.
  • It possesses antimicrobial and antioxidant properties.
  • Concerns exist regarding its potential genotoxic effects.

Purpose of the Study:

  • To evaluate the genotoxic effects of sodium metabisulfite (SMB) in various mouse tissues.
  • To assess the risk associated with high oral doses of SMB.

Main Methods:

  • Genotoxicity was assessed using the comet assay in liver and blood cells.
  • The micronucleus test was performed on blood and bone marrow cells.
  • Doses of 1 and 2g/kg of SMB were administered orally.

Main Results:

  • Significant increases in DNA damage index and frequency were observed in SMB-treated mice.
  • Elevated micronucleus frequencies were noted in peripheral blood and bone marrow at the highest SMB dose (2g/kg).
  • A reduction in the polychromatic to normochromatic erythrocyte ratio indicated potential bone marrow toxicity.

Conclusions:

  • High oral doses of sodium metabisulfite (SMB) may pose a genotoxic risk.
  • The study highlights the need for careful consideration of SMB dosage in food and pharmaceutical applications.
  • No sex-based differences in genotoxic effects were observed.

More Related Videos

In Vivo Alkaline Comet Assay and Enzyme-modified Alkaline Comet Assay for Measuring DNA Strand Breaks and Oxidative DNA Damage in Rat Liver10:38

In Vivo Alkaline Comet Assay and Enzyme-modified Alkaline Comet Assay for Measuring DNA Strand Breaks and Oxidative DNA Damage in Rat Liver

Published on: May 4, 2016

Advanced 3D Liver Models for In vitro Genotoxicity Testing Following Long-Term Nanomaterial Exposure08:25

Advanced 3D Liver Models for In vitro Genotoxicity Testing Following Long-Term Nanomaterial Exposure

Published on: June 5, 2020

Related Concept Videos

Mutagenicity and Carcinogenicity01:25

Mutagenicity and Carcinogenicity

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...
Bioactivation and Tissue Toxicity01:25

Bioactivation and Tissue Toxicity

Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...