tetano
Editor, Senior Moderator
Br J Pharmacol. 2013 Jan 16. doi: 10.1111/bph.12102. [Epub ahead of print]
Inhibition of monoamine oxidase A and stimulation of behavioural activities in mice by the inactive prodrug form of the anti-influenza agent oseltamivir.
Hiasa M, Isoda Y, Kishimoto Y, Saitoh K, Kimura Y, Kanai M, Shibasaki M, Hatakeyama D, Kirino Y, Kuzuhara T.
Source
Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan.
Abstract
BACKGROUND AND PURPOSE:
Oseltamivir is the most widely prescribed anti-influenza medication. However, in rare instances, it has been reported to stimulate behavioural activities in adolescents. The goal of this study was to determine the molecular mechanism responsible for these behavioural activities.
EXPERIMENTAL APPROACH:
We performed an in vitro assay of monoamine oxidase A (MAO-A), the enzyme responsible for neurotransmitter degradation, by using either the active form-oseltamivir carboxylate (OC) or the inactive prodrug-oseltamivir ethyl ester (OEE). We also analysed the docking of MAO-A with OEE or OC in silico. Mouse behaviours after OEE or OC administration were monitored using automated video and computer analysis.
KEY RESULTS:
OEE, but not OC, competitively and selectively inhibited human MAO-A. The estimated Ki value was comparable to the Km values of native substrates of MAO-A. Docking simulations in silico based on the tertiary structure of MAO-A suggested that OEE could fit into the inner pocket of the enzyme. Behavioural monitoring using automated video analysis further revealed that OEE, not OC, significantly enhanced spontaneous behavioural activities in mice, such as jumping, rearing, sniffing, turning, and walking.
CONCLUSIONS AND IMPLICATIONS:
Our multi-level analyses suggested OEE to be the cause of the side effects associated with oseltamivir and revealed the molecular mechanism underlying the stimulated behaviours induced by oseltamivir in some circumstances.
? 2013 The Authors. British Journal of Pharmacology ? 2013 The British Pharmacological Society.
PMID:
23320399
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23320399
Inhibition of monoamine oxidase A and stimulation of behavioural activities in mice by the inactive prodrug form of the anti-influenza agent oseltamivir.
Hiasa M, Isoda Y, Kishimoto Y, Saitoh K, Kimura Y, Kanai M, Shibasaki M, Hatakeyama D, Kirino Y, Kuzuhara T.
Source
Laboratory of Biochemistry, Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan.
Abstract
BACKGROUND AND PURPOSE:
Oseltamivir is the most widely prescribed anti-influenza medication. However, in rare instances, it has been reported to stimulate behavioural activities in adolescents. The goal of this study was to determine the molecular mechanism responsible for these behavioural activities.
EXPERIMENTAL APPROACH:
We performed an in vitro assay of monoamine oxidase A (MAO-A), the enzyme responsible for neurotransmitter degradation, by using either the active form-oseltamivir carboxylate (OC) or the inactive prodrug-oseltamivir ethyl ester (OEE). We also analysed the docking of MAO-A with OEE or OC in silico. Mouse behaviours after OEE or OC administration were monitored using automated video and computer analysis.
KEY RESULTS:
OEE, but not OC, competitively and selectively inhibited human MAO-A. The estimated Ki value was comparable to the Km values of native substrates of MAO-A. Docking simulations in silico based on the tertiary structure of MAO-A suggested that OEE could fit into the inner pocket of the enzyme. Behavioural monitoring using automated video analysis further revealed that OEE, not OC, significantly enhanced spontaneous behavioural activities in mice, such as jumping, rearing, sniffing, turning, and walking.
CONCLUSIONS AND IMPLICATIONS:
Our multi-level analyses suggested OEE to be the cause of the side effects associated with oseltamivir and revealed the molecular mechanism underlying the stimulated behaviours induced by oseltamivir in some circumstances.
? 2013 The Authors. British Journal of Pharmacology ? 2013 The British Pharmacological Society.
PMID:
23320399
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23320399