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. Author manuscript; available in PMC: 2014 May 13.
Published in final edited form as: J Exp Biol. 2008 Jan;211(0 1):92–105. doi: 10.1242/jeb.012450

Table 3.

Antagonist profiles of 5-HT and 5-HT from Panulirus and Procambarus are well conserved

Drug Potency (IC50, μmol l−1)
Efficacy (% reduction)
5-HT2βPan 5-HT2βPro 5-HT1αPan 5-HT1αPro 5-HT2βPan 5-HT2βPro
Clozapine 6.8 2.5 Bkd Bkd 79 86
Ritanserin 0.57 0.18 IA Bkd 58 86
Methiothepin 0.66 0.097 Bkd IA 84 88
(+)Butaclamol 0.14 0.017 IA Bkd 48 82
Cinanserin 1.2 1.6 IA IA 73 88
Gramine IA IA IA Bkd IA IA
(−)Butaclamol IA IA IA IA IA IA
Ketanserin IA IA IA IA IA IA
Spiperone IA IA IA IA IA ND
Prazosin IA IA IA Bkd IA IA
Atropine IA IA IA Bkd IA IA
Chlorpromazine ND ND IA IA ND ND
Flupenthixol ND ND IA Bkd ND ND
Domperidone ND ND IA Bkd ND ND
Fluphenazine ND ND IA Bkd ND ND
Haloperidol ND ND IA IA ND ND
Metoclopride ND ND IA IA ND ND
(−)Sulpiride ND ND IA Bkd ND ND
WAY100635 ND ND IA IA ND ND
Yohimbine ND ND IA IA ND ND
S(−)Propanolol ND ND Bkd IA ND ND
SB269970 ND ND IA IA ND ND
Metergoline ND ND Bkd Bkd ND ND
Cyproheptadine ND ND Bkd Bkd ND ND
SB224289 ND ND IA Bkd ND ND
BRL15572 ND ND IA IA ND ND
TFMPP ND ND IA IA ND ND
SCH23390 ND ND Bkd Bkd ND ND
S(−)eticlopride ND ND Bkd Bkd ND ND

IC50 values (potency) and relative efficacy were calculated from dose–response curves for each drug. Efficacy is presented as the percentage reduction of the total effect obtained from 5-HT in the absence of antagonist. Drugs that block one and not the other of 5-HT and 5-HT for each species are indicated in bold. N≥3 separate experiments for each drug.

IA, inactive; Bkd, drug has background activity on non-induced cells and was not tested on induced cells, ND, not determined.