Results 151 to 160 of about 1,538 (200)

Brevetoxin derivatives that inhibit toxin activity [PDF]

open access: yesChemistry and Biology, 2000
The brevetoxins are marine neurotoxins that interfere with the normal functions of the voltage-gated Na(+) channel. We have identified two brevetoxin derivatives that do not exhibit pharmacological properties typical of the brevetoxins and that function as brevetoxin antagonists.PbTx-3 and benzoyl-PbTx-3 elicited Na(+) channel openings during steady ...
Lynne A Fieber   +2 more
exaly   +4 more sources

Antibodies to brevetoxin B: Serologic differentiation of brevetoxin B and brevetoxin A

Toxicon, 1992
A brevetoxin B immunogen was prepared by reacting brevetoxin B with the amino groups of bovine albumin followed by treatment with sodium borohydride. Immunized rabbits produced antibodies that bound [3H]brevetoxin B-alcohol. This binding increased with repeated immunization (KD for one rabbit after three courses of immunization was about 10 pM ...
L, Levine, Y, Shimizu
openaire   +2 more sources

Brevetoxins

2000
Abstract Brevetoxins are lipid-soluble marine poisons synthesized by the red tide dinoflagellate Ptychodiscus brevis (previously Gymnodinium breve). These cyclic polyethers and structural relatives of ciguatoxin may induce massive killings of fish and also cause neurotoxic shell fish poisoning (NSP). NSP is a nonlethal intoxication of
Baden, Daniel G., Adams, David J.
openaire   +3 more sources

Total synthesis of brevetoxin A

Nature, 1998
Brevetoxin A is the most potent neurotoxin secreted by Gymnodinium breve Davis, a marine organism often associated with harmful algal blooms known as 'red tides'. The compound, whose mechanism of action involves binding to and opening of sodium channels, is sufficiently toxic to kill fish at concentrations of nanograms per ml and, after accumulation in
K C, Nicolaou   +5 more
openaire   +2 more sources

Cardiovascular effects of brevetoxins in dogs

Toxicon, 1985
In anesthetized spontaneously breathing dogs, brevetoxin caused dose-dependent periods of apnea and, at high doses, respiratory arrest. In artificially ventilated dogs, i.v. brevetoxin caused complex dose-related cardiovascular changes consisting of: (1) bradycardia; (2) triphasic blood pressure changes, sequentially characterized by depressor/pressor ...
G L, Johnson, J J, Spikes, S, Ellis
openaire   +2 more sources

Total Synthesis of Brevetoxin B

Journal of the American Chemical Society, 2005
The convergent total synthesis of brevetoxin B (1) has been achieved. The intramolecular allylation of the O,S-acetal 20, prepared from the alpha-chlorosulfide 17 and the alcohol 5, was carried out using AgOTf as a Lewis acid to give the diene 21, predominantly.
Isao, Kadota   +3 more
openaire   +2 more sources

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