Biomedical subjects
Publications and source records attributed to W M MCISAAC.
Five indole compounds have been isolated from bovine pineal tissue and characterized as 5-methoxytryptophol, N-acetyl-5-methoxytryptamine (melatonin), 5-hydroxytryptophol, 5-methoxyindole-3-acetic acid, and 5-hydroxyindole-3-acetic acid. Pineal hydroxyindole-O-methyltransferase, with S-adenosylmethionine, converts 5-hydroxytryptophol to 5-methoxytryptophol.
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Daily injection of 5-methoxytryptophol in microgram quantities in rats decreased the incidence of estrus and reduced ovarian weight in maturing animals.
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10-Methoxyharmalan, an alkaloid obtained by the cyclodehydration of melatonin, itself a derivative of serotonin, is a more potent serotonin antagonist than harmaline and is only slightly less active than lysergic acid diethylamide. It has a similar, yet slightly greater, effect on behavior as that of harmaline and is the most potent serotonin derivative, so far tested, that affects the avoidance-escape behavioral reflex
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