Singlet oxygen scavenging activity of nonsteroidal anti-inflammatory drugs

• Type: Article in International Scientific Journal
• Date: 2008

Authors

David Costa (Author) Other; Ana Gomes (Author) Other; Jose L F C Lima (Author) FFUP; Eduarda Fernandes (Author) FFUP

Journal

Title: Redox Report

Vol. 13 No. 5

Pages: 153-160

ISSN: 1351-0002

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 31 Citations

Scopus - 33 Citations

Scientific classification

FOS: Natural sciences > Biological sciences

Other information

Authenticus ID: P-003-XKS

DOI: 10.1179/135100008x308876

Abstract (EN): It has long been known that singlet oxygen ((1)O(2)) is generated during inflammatory processes. Once formed in substantial amounts, (1)O(2) may have an important role in mediating the destruction of infectious agents during host defense. On the other hand, (1)O(2) is capable of damaging almost all biological molecules and is particularly genotoxic, which gives a special relevance to the scavenging of this ROS throughout anti-inflammatory treatments. Considering that the use of nonsteroidal anti-inflammatory drugs (NSAIDs) constitutes a first approach in the treatment of persistent inflammatory processes (due to their ability to inhibit cyclooxygenase), a putative scavenging activity of NSAIDs for (1)O(2) would also represent a significant component of their therapeutic effect. The aim of the present study was to evaluate the scavenging activity for (1)O(2) by several chemical families of NSAIDs. The results suggested that the pyrazole derivatives (dipyrone and aminopyrine) are, by far, the most potent scavengers of (1)O(2) (much more potent compared to the other tested NSAIDs), displaying IC(50)-values in the low micromolar range. There was a lack of activity for most of the arylpropionic acid derivatives tested, with only naproxen and indoprofen displaying residual activities, as for the oxazole derivative, oxaprozin. On the other hand, the pyrrole derivatives (tolmetin and ketorolac), the indolacetic acid derivatives (indomethacin, and etodolac), as well as sulindac and its metabolites (sulindac sulfide and sulindac sulfone) displayed scavenging activity in the high micromolar range. Thus, the scavenging effect observed for dipyrone and aminopyrine will almost certainly contribute to their healing effect in the treatment of prolonged or chronic inflammation, while that of the other studied NSAIDs may have a lower contribution, though these assumptions still require further in vivo validation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8