Effects of acromelic acid A on the binding of [3H]glutamic acid and [3H]kainic acid to synaptic membranes and on the depolarization at the frog spinal cord.
Triton treatment of synaptic membranes from the frog spinal cord enhanced the specific binding of [3H]glutamic acid compared with non-treated fresh and frozen ones, but not that of [3H]kainic acid. Acromelic acid A specifically inhibited the binding of [3H]kainic acid, and was approximately 100 times more potent than kainic acid. Acromelic acid A and excitatory amino acids caused a depolarization in the ventral root of the frog spinal cord in a dose-dependent manner, and the effect of acromelic acid A was much superior to that of kainic acid or domoic acid. Acromelic acid A is one of the most potent kainic acid agonist at the frog spinal cord.
Maruyama
M
M
Laboratory of Neuropharmacology, Mitsubishi Kasei Institute of Life Sciences, Tokyo, Japan.
Takeda
K
K
D000818:Animals; D005971:Glutamates / Q000378:metabolism*; D018698:Glutamic Acid; D007608:Kainic Acid / Q000031:analogs & derivatives* / Q000378:metabolism* / Q000494:pharmacology; D008564:Membrane Potentials / Q000187:drug effects; D011892:Rana catesbeiana / Q000378:metabolism*; D013116:Spinal Cord / Q000187:drug effects / Q000378:metabolism* / Q000502:physiology; D013574:Synaptosomes / Q000187:drug effects / Q000378:metabolism*
D005971:Glutamates; D018698:Glutamic Acid; C051743:acromelic acid A; D007608:Kainic Acid