Linked Life Data

16454205

Source:http://linkedlifedata.com/resource/pubmed/id/16454205

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-2-3
pubmed:abstractText
The influence of complexation with hydroxypropyl-beta-cyclodextrin (HP-beta-CD) or beta-cyclodextrin (beta-CD) on the photo-induced production of free radicals by the sunscreen agents octyl-dimethylaminobenzoate (ODAB), oxybenzone (OB) and octyl-methoxycinnamate (OMC) was investigated. The formation of radical species during irradiation was detected by spin-trapping electron paramagnetic resonance (EPR) spectroscopy. 2,2,6,6-tetramethylpiperidine-1-oxyl, nitroxide radical (TEMPO) and 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) were used a spin-traps. Following the 4-h illumination with simulated sunlight, OB did not generate radicals. On the other hand, photoexcitation of solutions containing ODAB or OMC produced a marked decrease (>40%) of the TEMPO signal intensity, demonstrating the formation of carbon-centred radicals. In addition, the results obtained on irradiation of ODAB solutions containing DMPO as spin-trap indicated the generation of oxygen-centred radicals. Complexation of ODAB with HP-beta-CD and OMC with beta-CD markedly inhibited (>64%) the formation of free radicals generated by the sunscreens on exposure to simulated sunlight. Therefore, inclusion of ODAB and OMC into the cyclodextrin cavities minimizes their photosensitising potential.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0031-7144
pubmed:author
pubmed:issnType
Print
pubmed:volume
61
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
41-5
pubmed:dateRevised
2007-1-29
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Influence of complexation with cyclodextrins on photo-induced free radical production by the common sunscreen agents octyl-dimethylaminobenzoate and octyl-methoxycinnamate.
pubmed:affiliation
Dipartimento di Chimica, Università di Ferrara, Ferrara, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't