ECDYSTEROID Ở THỰC VẬT VÀ ĐA DẠNG CÁC LOÀI THỰC VẬT CHỨA ECDYSTEROID
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ECDYSTEROIDS IN PLANTS AND DIVERSITY OF SPECIES CONTAINNING ECDYSTEROID
Ecdysteroids are steroidal hormones that have been originally found in the animal kingdom to control moulting (ecdysis) and other metamorphosic processes in insects. Structurally, they are polyhydroxylated compounds that have a four-ringed skeleton, usually composed of 27, 28 or 29 carbon atoms. This group of naturally occurring plant ecdysteroids was designated phytoecdysteroids (Pes) to differentiate them from those isolated from animal sources. Recently more and more researchs have focused, on the effects of Pes on vertebrates and humans. The range of effects of these compounds appears to be very wide. They are apparently nontoxic to mammals, most of them are useful for humans. They have a broad spectrum of pharmacological and medicinal properties in mammals, including hepatoprotective and hypoglycaemic effects, increase adaptation and anabolic effects, without androgenic side-effects. Pes are also being considered as nutraceutical additives to food products.
Since the first discovery, 503 ecdysteroid compounds have been detected in 1339 species belong to 132 terrestrial plant families. Phytoecdysteroids have been detected from seeds, fruits, flowers, anthers, leaves, hark, stems, roots… The distribution of Pes in plant depends mainly on organs, the stage of development and the position of the organ on the plant, and can undergo changes depending on the season or geographical location.
Từ khóa
20E, ecdysteroids, functional food, medicin, phytoecdysteroid
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