85079-48-7

85079-48-7 structure

Name: Brevetoxin-3
Chemical Name: Brevetoxin 3
CAS Number: 85079-48-7
Molecular Formula: C₅₀H₇₂O₁₄
Molecular Weight: 897.09800
Catalog: Signaling Pathways Membrane Transporter/Ion Channel Sodium Channel
Create Date: 2016-04-02 08:30:07
Modify Date: 2024-01-13 16:10:06
Brevetoxin-3 (PbTx-3) is a potent allosteric voltage-gated Na+ channel activator and has multiple active centers (A-ring lactone, C-42 of R side chain)[1]. Brevetoxin-3 (PbTx-3) has a high affinity to site 5 of the voltage-sensitive Na+ channels, inhibits the inactivation of Na+ channels and prolongs the mean open time of these channels. Brevetoxin-3 (PbTx-3) repeated exposures can lead to prolonged airway hyperresponsiveness (AHR) and lung inflammation[2].

Name	Brevetoxin 3
Synonyms	GB 3 toxin T-17 toxin Brevetoxin PbTx 3 PbTx 3 GB 3 [3H]-PbTx 3 Brevetoxin T17 brevetoxin-3 Toxin T-17 Ptychodiscus brevis toxin 3

Description	Brevetoxin-3 (PbTx-3) is a potent allosteric voltage-gated Na+ channel activator and has multiple active centers (A-ring lactone, C-42 of R side chain)[1]. Brevetoxin-3 (PbTx-3) has a high affinity to site 5 of the voltage-sensitive Na+ channels, inhibits the inactivation of Na+ channels and prolongs the mean open time of these channels. Brevetoxin-3 (PbTx-3) repeated exposures can lead to prolonged airway hyperresponsiveness (AHR) and lung inflammation[2].
Related Catalog	Signaling Pathways >> Membrane Transporter/Ion Channel >> Sodium Channel Research Areas >> Inflammation/Immunology
Target	IC50: voltage-gated Na+ channel[1]
In Vitro	Brevetoxin-3 (PbTx-3)(30-500 nM) produces a shift in activation to more negative membrane potentials whereby single-channel activity is observed under steady-state conditions (maintained depolarization at -50 mV)[1].
In Vivo	Brevetoxin-3 (PbTx-3)(intratracheal instillation; 2.8 μg/kg; gestational days 15-18) radioactivity is detected in placentas and fetuses within 0.5 hours. Concentrations of brevetoxin equivalents in fetuses are approximately 0.3 ng/g throughout the 48-h post-dosing, resulting in a calculated dose to fetuses of 19 ng/gh. Following brevetoxin infusion, concentration of brevetoxin equivalents in fetuses is 0.1 ng/g, lower than that present in most maternal tissues[3]. . Animal Model: Pregnant CD-1 mice[3] Dosage: 2.8 μg/kg Administration: Intratracheal instillation; 2.8 μg/kg; gestational days 15–18 Result: Demonstrated placental transport of brevetoxin or its metabolites following maternal acute exposure.
References	[1]. Jeglitsch G,et al. Brevetoxin-3 (PbTx-3) and its derivatives modulate single tetrodotoxin-sensitive sodium channels in rat sensory neurons.J Pharmacol Exp Ther. 1998 Feb;284(2):516-25. [2]. Zaias J,et al. Repeated exposure to aerosolized brevetoxin-3 induces prolonged airway hyperresponsiveness and lung inflammation in sheep.Inhal Toxicol. 2011 Mar;23(4):205-11. [3]. Benson JM, et al. Placental transport of brevetoxin-3 in CD-1 mice.Toxicon. 2006 Dec 15;48(8):1018-26. Epub 2006 Aug 18.

Density	1.187g/cm3
Molecular Formula	C₅₀H₇₂O₁₄
Molecular Weight	897.09800
Exact Mass	896.49200
PSA	159.06000
LogP	5.26550
Index of Refraction	1.52

CHEMICAL IDENTIFICATION

RTECS NUMBER :: XW5885000

CHEMICAL NAME :: Toxin T-17

CAS REGISTRY NUMBER :: 85079-48-7

LAST UPDATED :: 198509

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 520 ug/kg

TOXIC EFFECTS :: Peripheral Nerve and Sensation - fasciculations Behavioral - tremor Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: TOXIA6 Toxicon. (Pergamon Press Ltd., Headington Hill Hall, Oxford OX3 OBW, UK) V.1- 1962- Volume(issue)/page/year: 20,457,1982

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 170 ug/kg

TOXIC EFFECTS :: Peripheral Nerve and Sensation - fasciculations Behavioral - tremor Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: TOXIA6 Toxicon. (Pergamon Press Ltd., Headington Hill Hall, Oxford OX3 OBW, UK) V.1- 1962- Volume(issue)/page/year: 20,457,1982

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 94 ug/kg

TOXIC EFFECTS :: Peripheral Nerve and Sensation - fasciculations Behavioral - tremor Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: TOXIA6 Toxicon. (Pergamon Press Ltd., Headington Hill Hall, Oxford OX3 OBW, UK) V.1- 1962- Volume(issue)/page/year: 20,457,1982

RIDADR	UN 3172
Hazard Class	6.1(a)

Precursor 0
DownStream 1
79580-28-2

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