| Bioactivity | TCB2 is an agonist of serotonin 5-HT2A receptor. |
| Invitro | The selective 5-HT2A agonist TCB2 at 30 nM produces a marked shift to the right in the competition curve obtained with the 5-HT1A receptor agonist ipsapirone from [3H]-8-OHDPAT binding sites in both areas of the brain. A significant increase in the mean Ki value is obtained with TCB2, demonstrating a reduction in the affinity of the high-affinity 5-HT1A agonist binding sites by the 5-HT2A agonist in both regions. In the case of hippocampus, there are also indications for antagonistic effects of ketanserin[2]. |
| In Vivo | In an initial dose-response study, TCB2 (0.5, 1.0, and 2.5 mg/kg) and DOI (0.5, 1.0, 2.5, and 5.0 mg/kg) induce head twitches in C57BL/6J mice in a dose-dependent manner compared to vehicle. Head twitches induced by TCB2 and DOI are similar across the doses, with the exception that at the highest dose (5.0 mg/kg), TCB2 induces half as many head twitches as does DOI (p=0.021). Confirming 5-HT2A mediation of the head twitch response, in two separate studies, pretreatment with the selective 5-HT2A antagonist MDL 11,939 (1.0 mg/kg) block head twitches induced by DOI (2.5 mg/kg) and by TCB2 (2.5 mg/kg; p<0.0001). Compared to vehicle, corticosterone levels are increased following TCB2 (5.0 mg/kg, p=0.01; 10.0, p=0.012; with a trend following 2.5 mg/kg, p=0.079) and DOI (10.0 mg/kg, p=0.035)[1]. |
| Name | TCB2 |
| CAS | 912342-28-0 |
| Formula | C11H15Br2NO2 |
| Molar Mass | 353.05 |
| Appearance | Solid |
| Transport | Room temperature in continental US; may vary elsewhere. |
| Storage | 4°C, sealed storage, away from moisture *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture) |
| Reference | [1]. Fox MA, et al. The serotonin 5-HT(2A) receptor agonist TCB-2: a behavioral and neurophysiological analysis. Psychopharmacology (Berl). 2010 Sep;212(1):13-23. [2]. Dasiel O. Borroto-Escuela, et al. Existence of Brain 5-HT1A–5-HT2A Isoreceptor Complexes with Antagonistic Allosteric Receptor–Receptor Interactions Regulating 5-HT1A Receptor Recognition. ACS Omega. 2017 Aug 31; 2(8): 4779–4789. |