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Phototoxicity: Its mechanism and animal alternative test methods
- Title
- Phototoxicity: Its mechanism and animal alternative test methods
- Authors
- Kim K.; Park H.; Lim K.-M.
- Ewha Authors
- 임경민
- SCOPUS Author ID
- 임경민
- Issue Date
- 2015
- Journal Title
- Toxicological Research
- ISSN
- 1976-8257
- Citation
- Toxicological Research vol. 31, no. 2, pp. 97 - 104
- Keywords
- Animal alternative test method; In vitro toxicology; Phototoxicity; Sunlight; UV
- Publisher
- Korean Society of Toxicology
- Indexed
- SCOPUS; KCI
- Document Type
- Article
- Abstract
- The skin exposure to solar irradiation and photoreactive xenobiotics may produce abnormal skin reaction, phototoxicity. Phototoxicity is an acute light-induced response, which occurs when photoreacive chemicals are activated by solar lights and transformed into products cytotoxic against the skin cells. Multifarious symptoms of phototoxicity are identified, skin irritation, erythema, pruritis, and edema that are similar to those of the exaggerated sunburn. Diverse organic chemicals, especially drugs, are known to induce phototoxicity, which is probably from the common possession of UV-absorbing benzene or heterocyclic rings in their molecular structures. Both UVB (290~320 nm) and UVA (320~400 nm) are responsible for the manifestation of phototoxicity. Absorption of photons and absorbed energy (hv) by photoactive chemicals results in molecular changes or generates reactive oxygen species and depending on the way how endogenous molecules are affected by phototoxicants, mechanisms of phototoxcity is categorized into two modes of action: Direct when unstable species from excited state directly react with the endogenous molecules, and indirect when endogeneous molecules react with secondary photoproducts. In order to identify phototoxic potential of a chemical, various test methods have been introduced. Focus is given to animal alternative test methods, i.e., in vitro, and in chemico assays as well as in vivo. 3T3 neutral red uptake assay, erythrocyte photohemolysis test, and phototoxicity test using human 3-dimensional (3D) epidermis model are examples of in vitro assays. In chemico methods evaluate the generation of reactive oxygen species or DNA strand break activity employing plasmid for chemicals, or drugs with phototoxic potential.
- DOI
- 10.5487/TR.2015.31.2.157
- Appears in Collections:
- 약학대학 > 약학과 > Journal papers
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