(-)-BICUCULLINE METHBROMIDE

Names

[ Name ]:
(-)-BICUCULLINE METHBROMIDE

[Synonym ]:
(-)-Bicuculline methbromide,1(S),9(R)
(-)-Bicuculine Methbromide
Bicuculline methobromide
(-)-Bicuculline Methbromide
HMS2234F21

Biological Activity

[Description]:

Bicuculline methobromide is a selective GABAA receptor antagonist with an IC50 value of 3 μM. Bicuculline methobromide induces clonic tonic convulsions in mammals and can also be used to block Ca2+ activated potassium channels. Bicuculline methobromide can be used in studies of epilepsy and other related psychiatric disorders[1][2].

[Related Catalog]:

Signaling Pathways >> Membrane Transporter/Ion Channel >> GABA Receptor

Research Areas >> Neurological Disease

Signaling Pathways >> Neuronal Signaling >> GABA Receptor

[In Vitro]

Bicuculline methobromide (1 μM and 3 μM) attains the maximal response of GABA. Bicuculline methobromide appears to shift the dose–response curves of GABA in parallel to the right without decreasing GABA maximal response, suggesting that it is a competitive antagonist at human α1β2γ2L GABAA receptors expressed in Xenopus oocytes[3]. Bicuculline methobromide (1-100 μM; 2 min; applied as outside-out patches) potently blocks both Apamin (HY-P0256)-sensitive small-conductance calcium-activated potassium channels (SK2) currents and Apamin-insensitive SK1 currents in Xenopus oocytes[4].

[In Vivo]

Bicuculline methobromide (subcutaneous injection, 1.25-3 mg/kg) can cause clonus-tonic convulsions in a dose-dependent manner in mice and these convulsions are enhanced by injection of the μ-opioid agonist morphine[1]. Bicuculline methobromide (subcutaneous injection, 1.5-3.2 mg/kg) induces male Swiss S mice generalized seizures with a CD50 (convulsant dose) of 2.2 mg/kg for clonus and CD50 of 2.4 mg/kg for tonus. Seizures induced by Bicuculline at the dose of 3.2 mg/kg can be blocked by pretreatment (i.p.) with the NMDA antagonists MK-801, CPP and CGS 19755[2].

[References]

[1]. Y Yajima, et al. Effects of differential modulation of mu-, delta- and kappa-opioid systems on bicuculline-induced convulsions in the mouse. Brain Res. 2000 Apr 17;862(1-2):120-6.

[2]. W A Turski, et al. Excitatory amino acid antagonists protect mice against seizures induced by bicuculline. Brain Res. 1990 Apr 23;514(1):131-4.

[3]. Huang SH, et al. Bilobalide, a sesquiterpene trilactone from Ginkgo biloba, is an antagonist at recombinant alpha1beta2gamma2L GABA(A) receptors. Eur J Pharmacol. 2003;464(1):1-8.

[4]. Khawaled R, et al. Bicuculline block of small-conductance calcium-activated potassium channels. Pflugers Arch. 1999 Aug;438(3):314-21.

Chemical & Physical Properties

[ Molecular Formula ]:
C₂₁H₂₀BrNO₆

[ Molecular Weight ]:
462.29100

[ Exact Mass ]:
461.04700

[ PSA ]:
63.22000

MSDS

Click to get detail MSDS

Safety Information

[ Symbol ]:

GHS06, GHS09

[ Signal Word ]:
Danger

[ Hazard Statements ]:
H300-H311 + H331-H410

[ Precautionary Statements ]:
P261-P264-P273-P280-P301 + P310-P311

[ Personal Protective Equipment ]:
Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter

[ Safety Phrases ]:
24/25

[ RIDADR ]:
UN 1544 6.1/PG 2

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