Abstract
Some antioxidant anesthetics directly inhibit lipid peroxidation mediated via the generation of reactive oxygen species (ROS). To date, the scavenging effects of midazolam on ROS have not been directly assessed. We investigated the inhibitory effect of midazolam on ROS [hydroxyl radical (HO·) and superoxide (O ·–2 )] by in vitro X-band electron spin resonance with the spin-trapping agent 5,5-dimethyl-1-pyrroline-N-oxide. Our results indicated that HO· and O ·–2 were not affected by midazolam at clinically relevant concentrations, but were directly scavenged by midazolam at high concentrations (i.e., >4.6 and >1.5 mM, respectively).
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Acknowledgments
Supported by grants from High-Tech Research Center Project of Kanagawa Dental College, Yokosuka, Kanagawa, Japan, and grants-in-aid for Scientific Research from the Japanese Ministry of Education, Science, and Culture, Tokyo (19592371) and (21792036).
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M. Hata and K. Kobayashi contributed equally to this work.
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Hata, M., Kobayashi, K., Yoshino, F. et al. Direct assessment of the antioxidant properties of midazolam by electron spin resonance spectroscopy. J Anesth 25, 765–769 (2011). https://doi.org/10.1007/s00540-011-1184-6
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DOI: https://doi.org/10.1007/s00540-011-1184-6