Results 81 to 90 of about 144 (134)

Ecdysterone from stem of Diploclisia glaucescens

Phytochemistry, 1989
Abstract 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, Lalith Jayasinghe, Subramaniam Sotheeswaran   +2 more
exaly   +2 more sources

Ecdysterone: Possible sources of origin in urine

Drug Testing and Analysis, 2022
AbstractEcdysterone (crustecdysone; beta‐ecdysone; 20‐hydroxyecdysone) is a naturally occurring steroid hormone belonging to the ecdysteroid class. The presented study investigated the possible concentration range of ecdysterone in urine after consumption of various preparations of spinach, drinking tea (made from Rhapoiticum Carthamoides) and topical ...
Dorota Kwiatkowska, Krzysztof Grucza, Katarzyna Chajewska, Patryk Konarski, Katarzyna Wojtkowiak, Aleksandra Drapała, Mariola Wicka   +6 more
openaire   +2 more sources

Isolation of ecdysterone

Chemistry of Natural Compounds, 1983
The kinetics of the extraction of ecdysterone from the roots with rhizomes ofRhaponticum carthamoides has been studied. The results of investigations on the selection of the optimum solvent for extracting ecdysterone from the raw material, for the process of sorption purification, and for the recrystallization of the ecdysterone are given.
A. U. Mamatkhanov, M. -R. I. Shamsutdinov, T. T. Shakirov   +2 more
openaire   +1 more source

Influence of ecdysterone on molting in Palaemonetes

General and Comparative Endocrinology, 1972
Abstract Since many female decapod crustaceans are known to delay molting until after release of their larvae or young, such ovigerous female shrimp may have a high titer of molt-inhibiting substance. At that time, comparison can be made between ovigerous females and mature males in terms of their response to injections of a molting hormone ...
J H, Hubschman, P W, Armstrong
openaire   +2 more sources

Ecdysterone, Ecdysterone Receptor, and Chromosome Puffs

1983
Steroid hormones modulate the rates of transcription of specific genes (Ashburner 1972b; Becker 1959; Becker 1962; Berendes 1967; Clever and Karlson 1960; Clever 1961; Zhimulev 1974). The paradigm of hormone action is that the hormone interacts with a specific cytoplasmic receptor.
B. Dworniczak, S. Kobus, K. Schaltmann-Eiteljor̈ge, O. Pongs   +3 more
openaire   +1 more source

The monitoring of the production of ecdysterone

Chemistry of Natural Compounds, 1983
A method for monitoring the production of ecdysterone from the roots ofRhaponticum carthamoides (Willd.) and the inflorescences ofRh. integrifolium C. Winkl. is given.
M. R. Yakubova, A. U. Mamatkhanov, M. -R. I. Shamsutdinov, T. T. Shakirov   +3 more
openaire   +1 more source

Effect of ecdysterone on hyperglycemia in experimental animals

Biochemical Pharmacology, 1971
Abstract 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, T, Otaka, M, Uchiyama, S, Ogawa   +3 more
openaire   +2 more sources

Ecdysterone induces acetylcholinesterase in mammalian brain

Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1984
The 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, M D, Aragones, J E, Godoy, A M, Martinez   +3 more
openaire   +2 more sources

Ecdysterone-induced protein synthesis in vitro

Journal of Insect Physiology, 1974
Abstract 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
openaire   +2 more sources

Cirriped vitellogenesis: Effect of ecdysterone in vitro

General and Comparative Endocrinology, 1977
Abstract 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
openaire   +2 more sources