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The Murine Serotonin Syndrome and the 5-HT1A Receptor: Behavioral Effects and Hypothermia

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Serotonin Receptor Technologies

Part of the book series: Neuromethods ((NM,volume 95))

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Abstract

The serotonin syndrome in humans is caused by severe side effects of drugs that either increase the extracellular serotonin (5-HT) concentration or are agonists at 5-HT receptors. The symptoms include mental state alterations (e.g., agitation, confusion), neuromuscular excitation (e.g., myoclonus, tremor), and autonomic dysregulation (e.g., hyperthermia, tachycardia). Similar symptoms can also be induced in rodents, especially in rats, whereas in mice the serotonin syndrome is not as clearly defined. Based on current literature and our own experimental studies in mice we will discuss in this chapter the validity of the murine model for the serotonin syndrome with special emphasis on the contribution of different 5-HT receptor subtypes focusing on the 5-HT1A receptor. We will provide a field manual to study changes in behavior and in body temperature. Behavioral changes characteristic for the serotonin syndrome should be assessed simultaneously after application of drugs consistently affecting the serotonergic system. A change in body temperature constitutes an important vegetative endpoint which can also be affected by drugs interfering with 5-HT metabolism and/or acting as 5-HT receptor agonists. The radiotelemetry technique allows to continuously monitor dose- and time-related drug effects without handling the animal. In general, the murine model for the serotonin syndrome is a valuable tool to study serotonin-induced hyperactivity for both basic and preclinical research in order to identify drugs or drug combinations with potential risk to induce a serotonin syndrome in man.

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Acknowledgments

Robert Haberzettl received financial support from the Elsa-Neumann-Doctoral-Fellowship from the state Berlin, Germany.

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Correspondence to Bettina Bert .

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Haberzettl, R., Fink, H., Dietze, S., Bert, B. (2015). The Murine Serotonin Syndrome and the 5-HT1A Receptor: Behavioral Effects and Hypothermia. In: Blenau, W., Baumann, A. (eds) Serotonin Receptor Technologies. Neuromethods, vol 95. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-2187-4_5

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  • DOI: https://doi.org/10.1007/978-1-4939-2187-4_5

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  • Publisher Name: Humana Press, New York, NY

  • Print ISBN: 978-1-4939-2186-7

  • Online ISBN: 978-1-4939-2187-4

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