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Direct modification of the 5-HT3 receptor current by some anticancer drugs

The serotonin (5-hydroxytryptamine) type 3 (5-HT3) receptor is an important target in the control of emesis, and 5-HT3 receptor antagonists are effective against the early phase chemotherapy evoked vomiting. We recently reported that the anticancer drugs irinotecan and topotecan directly modulate th...

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Published in:European journal of pharmacology 2018-02, Vol.821, p.21-28
Main Authors: Nakamura, Yukiko, Ishida, Yusuke, Kondo, Makoto, Shimada, Shoichi
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description The serotonin (5-hydroxytryptamine) type 3 (5-HT3) receptor is an important target in the control of emesis, and 5-HT3 receptor antagonists are effective against the early phase chemotherapy evoked vomiting. We recently reported that the anticancer drugs irinotecan and topotecan directly modulate the 5-HT-mediated 5-HT3 receptor current in vitro. In addition, the drug response depends on the 5-HT3 subunit composition. Here, we explored the effects of 35 anticancer drugs on the 5-HT3 receptor current. We microinjected Xenopus laevis oocytes with human 5-HT3A cRNA or a combination of human 5-HT3A and human 5-HT3B cRNA, and performed two-electrode voltage clamp recordings of 5-HT3A and 5-HT3AB receptor currents in the presence of each of the 35 drugs. Over 25% of the drugs we tested inhibited or potentiated the 5-HT3 receptor current. The drugs that modulated the 5-HT3 receptor current had molecular weights of approximately 500. These results implied that these anticancer drugs could affect 5-HT3 receptor.
doi_str_mv 10.1016/j.ejphar.2017.12.054
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subjects 5-HT3A
5-HT3B
Anticancer drug
Emesis
Modulator
Vomiting
title Direct modification of the 5-HT3 receptor current by some anticancer drugs
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