Results 151 to 160 of about 1,537 (197)
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Ecdysterone induces acetylcholinesterase in mammalian brain
Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1984The effects of ecdysterone on brain acetylcholinesterase (AChE) in immature and adult rats of both sexes have been studied in in vitro conditions. Ecdysterone produced an increase of AChE in rat brain slices. The most remarkable effect was found in immature male rats. In vitro assay using a purified AChE from electric eel showed no effect. Pretreatment
R E, Catalan +3 more
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Ecdysterone-induced protein synthesis in vitro
Journal of Insect Physiology, 1974Abstract Ecdysterone added in vitro to wing tissue from diapausing Antheraea polyphemus pupae induced the synthesis of several epidermal cell proteins. This is one of few instances in which any steroid hormone in physiological concentrations has been able to induce specific protein synthesis in target tissue in vitro soon after hormone stimulation ...
M F, Ruh, T S, Ruh, W, DeWert, V, Duenas
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Ecdysterone From Stem of Diploclisia glaucescens
Phytochemistry, 1989Abstract The stem of Diploclisia glaucescens afforded ecdysterone in a high yield of over 3%. 13 C NMR of the tetraacetate and NOE studies on the triacetate provided further data on the structure and conformation of this phytoecdysteroid. Hemolytic, insecticidal and spermicidal activity are reported for the compound.
Veranja Karunaratne +2 more
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Reaction of an insect cell line to ecdysterone
Experimental Cell Research, 1971Ecdysterone applied above the 0.1 μg/ml level to Grace's Antheraea eucalypti Scott [Austrocaligula eucalypti (Scott)] cell line increased cell volume, cell motion, the breakdown of thymidine, and the uptake and breakdown of uridine and decreased the rate of growth of the cell population and the uptake of thymidine.
J P, Reinecke, J D, Robbins
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Cirriped vitellogenesis: Effect of ecdysterone in vitro
General and Comparative Endocrinology, 1977Abstract Ovarioles of Balanus amphitrite and B. eburneus were cultured with ecdysterone in medium (10−4–1 μg/ml). Yolk droplets of mature oocytes showed increasing degeneration with increasing concentration of ecdysterone. Other ovarian cells, cement gland cells, and mantle parenchyma were not affected to any extent. Although preliminary, the results
U E, Fyhn, H J, Fyhn, J D, Costlow
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Effect of ecdysterone on hyperglycemia in experimental animals
Biochemical Pharmacology, 1971Abstract Ecdysterone, one of the insect-metamorphosing steroids isolated from plants (Amaranthaceae: Achyranthes fauriei ), has been recognized to have a suppressive effect on hyperglycemia induced by several hyperglycemic agents. While the administration of ecdysterone did not alter the blood glucose level of normal animals, pretreatment with ...
T, Yoshida +3 more
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Steroidal Saponins and Ecdysterone From Asparagus filicinus and Their Cytotoxic Activities
Steroids, 2010 Two new spirostanoides, filiasparosides E (1) and F (2), one new furostanoside, filiasparoside G (3), and one new ecdysterone, stachysterone A-20, 22-acetonide (4), together with six known steroidal saponins, asparagusin A (5), filiasparoside A (6 ...
Ka-Wing Cheng, Wen-Cai Ye, Mingfu Wang
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Ecdysterone biosynthesis in Podocarpus elata
Phytochemistry, 1968Abstract The insect molting hormone ecdysterone was isolated in radioactive form after administration of cholesterol-4- 14 C to Podocarpus elata seedlings. Cholestenone-4- 14 C, however, was not significantly incorporated into ecdysterone by this plant. The biosynthetic implications of these results are discussed.
Horst H. Sauer +2 more
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Cellular Response to Ecdysterone in vitro
Science, 1969Organ cultures of hindgut from diapausing tobacco hornworm pupae, Manduca sexta (Johannson), produce an abundance of migrant cells around the original explant. With time-lapse cinematography, these cells were seen to move slowly and tended to aggregate.
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Source and Availability of Ecdysterones
1974Achyranthes radix, a source of the phytoecdysones, ecdysterone (I) and inokosterone (II), is an important crude drug that has been used for diuretic, tonic, and analgesic purposes in East Asia from ancient times. The components of this crude drug have been reported by many chemists to be a saponin with oleanolic acid as a sapogenin, achyrantin ...
Shuntaro Ogawa +2 more
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