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Int. J. Environ. Res. Public Health 2005, 2(1), 58-62; doi:10.3390/ijerph2005010058
Article

Ultraviolet Radiation Increases the Toxicity of Pyrene, 1-Aminopyrene and 1-Hydroxypyrene to Human Keratinocytes

1,2,3,* , 1,3,4 and 2,3
Received: 15 November 2004; Accepted: 6 February 2005 / Published: 30 April 2005
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Abstract: Over the past several years, a great deal of interest has been focused on the harmful effects of ultraviolet (UV) radiation to human skin. UV light has been implicated in aging, sunburn and skin cancer. Few studies, however, have been done to determine the effects that UV light, in conjunction with other environmental contaminants, may have on human skin. Polycyclic Aromatic Hydrocarbons (PAHs) are a class of compounds that have been reported to be toxic, mutagenic and carcinogenic to many eukaryotic organisms. UV light is also known to increase the toxicity of PAHs through photo-activation and photo-modification. The purpose of this study was to assess the effects of UV-A irradiated pyrene (Pyr), 1-aminopyrene (1-AP) and 1-hydroxypyrene (1-HP) on human keratinocytes, the skin primary site of UV irradiated PAH exposure. Our findings indicate that simultaneous treatment of human keratinocyte cell line, HaCaT, with 1.0μg/ml pyrene, 1-AP or 1-HP and 3.9 J/cm2/min UV-A light resulted in significant inhibition of cell proliferation. Approximately 100% of the cells died in the case of UV-A irradiated 1-AP and 1-HP. In the case of UV-A irradiated pyrene, more than 70% of the cells died, indicating that UV-A is able to transform these PAHs into more harmful intermediates.
Keywords: Polycyclic Aromatic Hydrocarbons; photocytotoxicity; ultraviolet radiation; keratinocytes (HaCaT) Polycyclic Aromatic Hydrocarbons; photocytotoxicity; ultraviolet radiation; keratinocytes (HaCaT)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ekunwe, S.I.N.; Hunter, R.D.; Hwang, H.-M. Ultraviolet Radiation Increases the Toxicity of Pyrene, 1-Aminopyrene and 1-Hydroxypyrene to Human Keratinocytes. Int. J. Environ. Res. Public Health 2005, 2, 58-62.

AMA Style

Ekunwe SIN, Hunter RD, Hwang H-M. Ultraviolet Radiation Increases the Toxicity of Pyrene, 1-Aminopyrene and 1-Hydroxypyrene to Human Keratinocytes. International Journal of Environmental Research and Public Health. 2005; 2(1):58-62.

Chicago/Turabian Style

Ekunwe, Stephen I.N.; Hunter, Rochelle D.; Hwang, Huey-Min. 2005. "Ultraviolet Radiation Increases the Toxicity of Pyrene, 1-Aminopyrene and 1-Hydroxypyrene to Human Keratinocytes." Int. J. Environ. Res. Public Health 2, no. 1: 58-62.



Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert