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Genotoxicity assessment of vaccine adjuvant squalene

D Yüzbaşıoğlu1, F Ünal, F Koç

  • 1Faculty of Science, Department of Biology, Genetic Toxicology Laboratory, Gazi University, 06500 Teknikokullar, Ankara, Turkey. deniz@gazi.edu.tr

Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
|March 5, 2013
PubMed

Insights

Squalene, a vaccine adjuvant, showed no genotoxic effects in human lymphocytes via chromosomal aberration and micronucleus tests. However, further in vivo studies are needed to confirm its safety profile.

Area of Science:

  • Toxicology
  • Immunology
  • Genetics

Background:

  • Vaccine adjuvants play a crucial role in enhancing immune responses.
  • Squalene is a commonly used adjuvant in various vaccines.
  • Assessing the genotoxic potential of vaccine components is vital for safety.

Purpose of the Study:

  • To evaluate the genotoxic potential of squalene in human and rat lymphocytes.
  • To investigate the effects of squalene on chromosomal aberrations, sister chromatid exchanges, and micronucleus formation.
  • To assess DNA damage using the comet assay.

Main Methods:

  • In vitro and in vivo assays were performed on human and rat lymphocytes.
  • Chromosomal aberrations (CAs), sister chromatid exchanges (SCEs), and micronucleus (MNs) tests were conducted.
  • Comet assay was used to measure DNA damage (comet tail length and intensity).

Main Results:

  • Squalene did not induce chromosomal aberrations or micronucleus formation in human lymphocytes.
  • A significant increase in sister chromatid exchanges was observed at most concentrations.
  • Comet assay results showed mixed effects in vitro and in vivo, with no consistent DNA damage.
  • Squalene was not considered genotoxic in human lymphocytes based on the in vitro data.

Conclusions:

  • Squalene demonstrated a lack of genotoxicity in human lymphocytes for chromosomal aberrations and micronucleus tests.
  • The observed increase in sister chromatid exchanges warrants further investigation.
  • Additional in vivo studies are necessary to definitively ascertain the genotoxic effects of squalene.

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