Acide quisqualique

Quisqualic acid is an agonist of the AMPA, kainate, and group I metabotropic glutamate receptors. It is one of the most potent AMPA receptor agonists known. It causes excitotoxicity and is used in neuroscience to selectively destroy neurons in the brain or spinal cord. Quisqualic acid occurs naturally in the seeds of Quisqualis species. Research conducted by the USDA Agricultural Research Service, has demonstrated quisqualic acid is also present within the flower petals of zonal geranium (Pelargonium x hortorum) and is responsible for causing rigid paralysis of the Japanese beetle. Quisqualic acid is thought to mimic L-glutamic acid, which is a neurotransmitter in the insect neuromuscular junction and mammalian central nervous system. Combretum indicum (Quisqualis indica var. villosa) is native to tropical Asia but is still doubt whether is indigenous from Africa or was introduced there. Since the amino acid that can be isolated from its fruits can nowadays be made in the lab, the plant is mostly cultivated as an ornamental plant. Its fruits are known for having anthelmintic effect, therefore they are used to treat ascariasis. The dried seeds are used to reduce vomiting and to stop diarrhoea, but an oil extracted from the seeds can have purgative properties. The roots are taken as a vermifuge and leaf juice, softened in oil, are applied to treat ulcers, parasitic skin infections or fever. The plant is used for pain relief, and in the Indian Ocean islands, a decoction of the leaves is used to bath children with eczema. In the Philippines, people chew the fruits to get rid of the cough and the crushed fruits and seeds are applied to ameliorate nephritis. In Vietnam, they use the root of the plant to treat rheumatism. In Papua New Guinea the plants are taken as a contraceptive medicine. However the plant does not have just medicinal use. In west Africa, the long and elastic stems are used for fish weir, fish traps and basketry. The flowers are edible, and they are added in salads to add color.