Results 91 to 100 of about 144 (134)

Reaction of an insect cell line to ecdysterone

Experimental Cell Research, 1971
Ecdysterone 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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Cellular Response to Ecdysterone in vitro

Science, 1969
Organ 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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Cockroach Leg Regeneration: Effects of Ecdysterone in vitro

Science, 1970
Regenerating epithelial tissue from the cockroach leg forms two cuticular coverings. The first of these consists of a protein-carbohydrate complex that is replaced before molting. The second covering represents the cuticle containing chitin. The deposition of the cuticle can be induced in vitro by adding ecdysterone to the culture medium.
E P, Marks, R A, Leopold
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Ecdysterone biosynthesis in Podocarpus elata

Phytochemistry, 1968
Abstract 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, Raymond D. Bennett, Erich Heftmann   +2 more
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Heterophylic action of ecdysterone

Naturwissenschaften, 1980
~o ~a ,~ so 6o 2~ ~o ~o 5o 6o 2o ao ,~ so 6o ~o 3o ~o ~o ~ port to the synchronous variations under- gone by the two cyclic nucleotides in bio- logical systems (7). Moreover, the varia- tions in protein kinase activity during the same experiment lend further support to the idea stated above: the similar trends in the variation of the kinase and cAMP ...
R E, Catalán, A M, Martínez, M D, Aragonés   +2 more
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Source and Availability of Ecdysterones

1974
Achyranthes 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, Nobushige Nishimoto, Hiroyuki Matsuda   +2 more
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Effects of ecdysterone in polytene chromosomes of Trichosia pubescens

Developmental Biology, 1984
Injection of ecdysterone into mid-fourth instar larvae of Trichosia pubescens brought about drastic changes in the puffing pattern of the chromosomes of the salivary gland. The puff sequence induced by the hormone is quite similar to that which normally occurs at the end of larval life.
D C, Amabis, J M, Amabis
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Lobster molting hormones: Isolation and biosynthesis of ecdysterone

Experientia, 1974
L'ecdysterone, hormone de mue des insectes, a ete extraite de homards femelles (Homarus americanus) venant de muer. Sa concentration moyenne est de 6μg/kg de homard vivant. L'assimilation de cholesterol (4-14C) par les homards femelles avant la mue et la biosynthese d'ecdysterone a partir de ce precurseur est demontree.
R B, Gagosian, R A, Bourbonniere, W B, Smith, E F, Couch, C, Blanton, W, Novak   +5 more
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[Immunomodulating effect of ecdysterones].

Ukrainskii biokhimicheskii zhurnal (1978), 1992
Ecdysterone, its 20-desoxy-derivative alpha-ecdysone, their 2-desoxy-derivatives ecdysterone 2, 3, 22-triacetate and preparation BTI-4 have been studied for their effect on [3H]-thymidine incorporation in different populations of animal and human lymphocytes.
G N, Fomovskaia, A G, Berdyshev, Iu D, Kholodova   +2 more
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Acceleration by Ecdysterone of Premoult Substages in the Crayfish

Nature, 1973
AN insect does not enter premoult if its thoracic glands have been removed, nor a crustacean if its y-organs have been removed, but once premoult is under way it continues whether or not the glands are present1,2. This suggests that the hormone secreted by these glands acts merely as a trigger to initiate premoult, and as the injection of ecdysone also
J. R. STEVENSON, J. A. TSCHANTZ
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