Nitric oxide-scavenging activity of polyhydroxylated fullerenol, C60(OH)24. |
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Authors: | Snezana M Mirkov Aleksandar N Djordjevic Nebojsa L Andric Silvana A Andric Tatjana S Kostic Gordana M Bogdanovic Mirjana B Vojinovic-Miloradov Radmila Z Kovacevic |
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Institution: | Department of Medicine, The University of Chicago, 5841 South Maryland Ave. MC 2115, Chicago, IL 60637, USA. |
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Abstract: | Investigation of the possible nitric oxide-scavenging activity of hydroxylated derivative of fullerene, fullerenol C60(OH)24, demonstrated that it expressed direct scavenging activity toward nitric oxide radical (NO) liberated within solution of sodium nitroprusside (SNP), a well known NO donor. In parallel, pre-treatment (30') with intratesticular injection of fullerenol (60 microg/each testis) prevented NO-induced decrease of catalase, glutathione transferase and glutathione peroxidase activities in the denucleated fraction of interstitial testicular cells of adult rats 2 h after intratesticular injection of SNP (20 microg/each testis). In addition, fullerenol decreased formation of thiobarbituric acid-reactive substances (TBA-RS) with similar efficiency as butylated hydroxy toluen (BHT), a well known antioxidant. Also, fullerenol expressed certain scavenging activity toward superoxide anion (O2-) in xanthine/xanthine oxidase system. In summary, results obtained in this study confirmed free radical-scavenging activity of fullerenol, and according to our knowledge, it is the first evidence of direct NO-quenching activity of hydroxylated C60 derivative in different milieu. |
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