Co-mutagenic activity of arsenic and benzo[a]pyrene in mouse skin

Jared Fischer, Susan B. Robbins, Mustafa Al-Zoughool, Sasi S. Kannamkumarath, Saundra L. Stringer, Jon Scott Larson, Joseph A. Caruso, Glenn Talaska, Peter J. Stambrook, James R. Stringer

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Exposure to inorganic arsenic in drinking water is linked to skin, lung and bladder cancer in humans. The mechanism of arsenic-induced cancer is not clear, but exposure to arsenic and polycyclic arylhydrocarbons (PAH) is more carcinogenic than exposure to either type of carcinogen alone. Arsenic can also generate reactive oxygen species, suggesting that oxidation of DNA may play a role in carcinogenesis. Oxidization of guanosines in polyG tracts is known to cause frameshift mutations, and such events can be detected in situ using the G11 placental alkaline phosphatase (PLAP) transgenic mouse model, which reports frameshift mutations in a run of 11 G:C basepairs by generating cells containing heat-resistant alkaline phosphatase activity. PAH can also induce frameshift mutations. In the study described here, FVB/N mice carrying the G11 PLAP transgene were crossed to C57Bl/6 mice. Half of the hybrid mice were given drinking water with sodium arsenite (10 mg/L) for 10 weeks. Half of the arsenic treated mice were also exposed to benzo[a]pyrene (BaP) by skin painting (500 nmol/week) for 8 weeks. Another group of mice was exposed to BaP but not arsenic. The effect on frameshift mutation was assessed by staining sections of skin tissue to detect cells with PLAP activity. Arsenic alone had no significant effect. On average, mice given BaP alone had approximately three times more PLAP-positive (PLAP+) cells. By contrast, mice exposed to both arsenic and BaP exhibited 10-fold more PLAP+ cells in the skin, and these cells were often arranged in large clusters, suggesting derivation from stem cells. Whereas combined treatment produced more PLAP+ cells, stable BaP adduct levels and arsenic burdens were not higher in mice exposed to both agents compared to mice exposed to either one agent or the other.

Original languageEnglish (US)
Pages (from-to)35-46
Number of pages12
JournalMutation Research - Genetic Toxicology and Environmental Mutagenesis
Volume588
Issue number1
DOIs
StatePublished - Dec 7 2005
Externally publishedYes

Fingerprint

Benzo(a)pyrene
Arsenic
Skin
Frameshift Mutation
Drinking Water
Paintings
Guanosine
Skin Neoplasms
placental alkaline phosphatase
Transgenes
Urinary Bladder Neoplasms
Carcinogens
Transgenic Mice
Alkaline Phosphatase
Reactive Oxygen Species
Lung Neoplasms
Carcinogenesis
Stem Cells
Hot Temperature
Staining and Labeling

Keywords

  • Arsenic
  • Benzo[a]pyrene
  • Mouse
  • Mutation
  • Skin

ASJC Scopus subject areas

  • Genetics
  • Health, Toxicology and Mutagenesis

Cite this

Fischer, J., Robbins, S. B., Al-Zoughool, M., Kannamkumarath, S. S., Stringer, S. L., Larson, J. S., ... Stringer, J. R. (2005). Co-mutagenic activity of arsenic and benzo[a]pyrene in mouse skin. Mutation Research - Genetic Toxicology and Environmental Mutagenesis, 588(1), 35-46. https://doi.org/10.1016/j.mrgentox.2005.09.003

Co-mutagenic activity of arsenic and benzo[a]pyrene in mouse skin. / Fischer, Jared; Robbins, Susan B.; Al-Zoughool, Mustafa; Kannamkumarath, Sasi S.; Stringer, Saundra L.; Larson, Jon Scott; Caruso, Joseph A.; Talaska, Glenn; Stambrook, Peter J.; Stringer, James R.

In: Mutation Research - Genetic Toxicology and Environmental Mutagenesis, Vol. 588, No. 1, 07.12.2005, p. 35-46.

Research output: Contribution to journalArticle

Fischer, J, Robbins, SB, Al-Zoughool, M, Kannamkumarath, SS, Stringer, SL, Larson, JS, Caruso, JA, Talaska, G, Stambrook, PJ & Stringer, JR 2005, 'Co-mutagenic activity of arsenic and benzo[a]pyrene in mouse skin', Mutation Research - Genetic Toxicology and Environmental Mutagenesis, vol. 588, no. 1, pp. 35-46. https://doi.org/10.1016/j.mrgentox.2005.09.003
Fischer, Jared ; Robbins, Susan B. ; Al-Zoughool, Mustafa ; Kannamkumarath, Sasi S. ; Stringer, Saundra L. ; Larson, Jon Scott ; Caruso, Joseph A. ; Talaska, Glenn ; Stambrook, Peter J. ; Stringer, James R. / Co-mutagenic activity of arsenic and benzo[a]pyrene in mouse skin. In: Mutation Research - Genetic Toxicology and Environmental Mutagenesis. 2005 ; Vol. 588, No. 1. pp. 35-46.
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