Accumulation and toxicity of monophenyl arsenicals in rat endothelial cells

Hirano, S., Kobayashi, Y., Hayakawa, T., Cui, X., Yamamoto, M., Kanno, S. and Shraim, A. (2005) Accumulation and toxicity of monophenyl arsenicals in rat endothelial cells. Archives Of Toxicology, 79 1: 54-61. doi:10.1007/s00204-004-0598-4

Author Hirano, S.
Kobayashi, Y.
Hayakawa, T.
Cui, X.
Yamamoto, M.
Kanno, S.
Shraim, A.
Title Accumulation and toxicity of monophenyl arsenicals in rat endothelial cells
Journal name Archives Of Toxicology   Check publisher's open access policy
ISSN 0340-5761
Publication date 2005
Sub-type Article (original research)
DOI 10.1007/s00204-004-0598-4
Volume 79
Issue 1
Start page 54
End page 61
Total pages 8
Editor H. Bolt
Place of publication New York
Publisher Springer
Collection year 2005
Language eng
Subject C1
321299 Public Health and Health Services not elsewhere classified
730210 Environmental health
Abstract Clark 1 (diphenylarsine chloride) and Clark 2 ( diphenylarsine cyanide) were used as chemical weapon agents (CWA), and the soil contamination by these CWA and their degraded products, diphenyl and phenyl arsenicals, has been one of the most serious environmental issues. In a series of comparisons in toxicity between trivalent and pentavalent arsenicals we investigated differences in the accumulation and toxicity of phenylarsine oxide (PAO(3+)) and phenylarsonic acid (PAA(5+)) in rat heart microvascular endothelial cells. Both the cellular association and toxicity of PAO(3+) were much higher than those of PAA(5+), and LC50 values of PAO(3+) and PAA(5+) were calculated to be 0.295 muM and 1.93 mM, respectively. Buthionine sulfoximine, a glutathione depleter, enhanced the cytotoxicity of both PAO(3+) and PAA(5+). N-Acetyl-L-cysteine (NAC) reduced the cytotoxicity and induction of heme oxygenase-1 (HO-1) mRNA in PAO(3+)-exposed cells, while NAC affected neither the cytotoxicity nor the HO-1 mRNA level in PAA(5+)-exposed cells. The effect of NAC may be due to a strong affinity of PAO(3+) to thiol groups because both NAC and GSH inhibited the cellular accumulation of PAO(3+), but PAA(3+) increased tyrosine phosphorylation levels of cellular proteins. These results indicate that the inhibition of protein phosphatases as well as the high affinity to cellular components may confer PAO(3+) the high toxicity.
Keyword phenylarsine oxide
phenylarsonic acid
endothelial cell
heme oxygenase-1
buthionine sulfoximine
inductively coupled plasma mass spectrometry
Lung Epithelial-cells
Warfare Agents
Organoarsenic Compounds
Methylated Arsenicals
Dimethylarsinic Acid
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2006 Higher Education Research Data Collection
National Research Centre for Environmental Toxicology Publications
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 15 Aug 2007, 06:26:50 EST