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Showing 25 to 36 of 120 entries
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Reconstruction of insect hormone pathways in an aquatic firefly, .

PeerJ

Chanchay P, Vongsangnak W, Thancharoen A, Sriboonlert A.
PMID: 31396456
PeerJ. 2019 Aug 02;7:e7428. doi: 10.7717/peerj.7428. eCollection 2019.

Insect hormones: ecdysteroids and juvenile hormones have crucial functions during the regulation of different developmental pathways in insects. Insect metamorphosis is one of the primary pathways regulated by these hormones. The insect hormone biosynthetic pathway is conserved among arthropods,...

Metabolism and Excretion of Injected [3H]-Ecdysone by Female Lobsters, Homarus americanus.

The Biological bulletin

Snyder MJ, Chang ES.
PMID: 29304657
Biol Bull. 1991 Jun;180(3):475-484. doi: 10.2307/1542348.

The dynamics of ecdysteroid metabolism and excretion were followed in adult lobsters, Homarus americanus. Females at five different molt stages were injected with [3H]-ecdysone. Levels of [3H]-20-hydroxyecdysone (20E), converted from [3H]-ecdysone, rose rapidly and remained significantly higher in premolt...

Insulin signaling pathways in lepidopteran ecdysone secretion.

Frontiers in physiology

Smith WA, Lamattina A, Collins M.
PMID: 24550835
Front Physiol. 2014 Feb 05;5:19. doi: 10.3389/fphys.2014.00019. eCollection 2014.

Molting and metamorphosis are stimulated by the secretion of ecdysteroid hormones from the prothoracic glands. Insulin-like hormones have been found to enhance prothoracic gland activity, providing a mechanism to link molting to nutritional state. In silk moths (Bombyx mori),...

Insulin signaling and the regulation of insect diapause.

Frontiers in physiology

Sim C, Denlinger DL.
PMID: 23885240
Front Physiol. 2013 Jul 22;4:189. doi: 10.3389/fphys.2013.00189. eCollection 2013.

A rich chapter in the history of insect endocrinology has focused on hormonal control of diapause, especially the major roles played by juvenile hormones (JHs), ecdysteroids, and the neuropeptides that govern JH and ecdysteroid synthesis. More recently, experiments with...

Ecdysteroids in Axenically Propagated Caenorhabditis elegans and Culture Medium.

Journal of nematology

Chitwood DJ, Feldlaufer MF.
PMID: 19287765
J Nematol. 1990 Oct;22(4):598-607.

Ecdysteroids (insect molting hormones) from Caenorhabditis elegans were chromatographically purified and quantified by radioimmunoassay. Nematodes from semidefined medium contained the immunoreactive equivalent of 460 pg ecdysone per gram dry weight. Culture medium, however, contained the immunoreactive equivalent of 68...

Larval testes of the tobacco budworm: a new source of insect ecdysteroids.

Science (New York, N.Y.)

Loeb MJ, Woods CW, Brandt EP, Boakovec AB.
PMID: 17807143
Science. 1982 Nov 26;218(4575):896-8. doi: 10.1126/science.218.4575.896.

Testes of last-instar larvae of the tobacco budworm release five times more ecdysteroid into incubation medium (judged by radioimmunoassay) in 2.5 hours than is found in testis homogenates. Incubation of testicular components indicates that the testis sheath may be...

High titers of ecdysteroids are associated with the secretory process of embryonic envelopes in the european lobster.

Tissue & cell

Goudeau M, Lachaise F, Carpentier G, Goxe B.
PMID: 18620305
Tissue Cell. 1990;22(3):269-81. doi: 10.1016/0040-8166(90)90002-q.

The newly laid egg of the lobster Homarus gammarus is surrounded by a vitelline coat. Just after fertilization, a new subjacent envelope (2), originating from the cortical reaction, is deposited beneath the vitelline coat. In the course of embryonic...

Induction of choriogenesis by 20-hydroxyecdysone in the German cockroach.

Tissue & cell

Bellés X, Cassier P, Cerdá X, Pascual N, André M, Rósso Y, Piulachs MD.
PMID: 18621230
Tissue Cell. 1993 Apr;25(2):195-204. doi: 10.1016/0040-8166(93)90019-h.

Experiments in vitro have shown that 20-hydroxyecdysone (at a concentration of 0.2 and 2 microM and after 12 and 24 hr of incubation) is able to induce the precocious deposition of chorion materials by the follicular epithelium of young...

The juvenile hormone analog pyriproxyfen affects ecdysteroid-dependent cuticle melanization and shifts the pupal ecdysteroid peak in the honey bee (Apis mellifera).

Arthropod structure & development

Zufelato MS, Bitondi MM, Simões ZL, Hartfelder K.
PMID: 18088919
Arthropod Struct Dev. 2000 Apr;29(2):111-9. doi: 10.1016/s1467-8039(00)00023-2.

The control of the pupal melanization in the honey bee by ecdysteroids, and the modulation of these processes by a juvenile hormone analog were investigated by a combination of in vivo and in vitro experiments. Injection of 1-5 microg...

Recent progress in understanding the role of ecdysteroids in adult insects: Germline development and circadian clock in the fruit fly Drosophila melanogaster.

Zoological letters

Uryu O, Ameku T, Niwa R.
PMID: 26605077
Zoological Lett. 2015 Nov 02;1:32. doi: 10.1186/s40851-015-0031-2. eCollection 2015.

Steroid hormones are one of the major bioactive molecules responsible for the coordinated regulation of biological processes in multicellular organisms. In insects, the principal steroid hormones are ecdysteroids, including 20-hydroxyecdysone. A great deal of research has investigated the roles...

Asymmetrically distributed ecdysteroid-related antigens in follicles and young embryos of Drosophila melanogaster.

Roux's archives of developmental biology : the official organ of the EDBO

Grau V, Gutzeit HO.
PMID: 28305668
Rouxs Arch Dev Biol. 1990 Feb;198(5):295-302. doi: 10.1007/BF00377396.

We have produced monoclonal and polyclonal antibodies against an antigen that is asymmetrically distributed in mature oocytes of Drosophila melanogaster. During late oogenesis and early embryogenesis the antigen undergoes dramatic changes in its cellular localization: until about 2.5 h...

Ecdysteroids: A novel class of anabolic agents?.

Biology of sport

Parr MK, Botrè F, Naß A, Hengevoss J, Diel P, Wolber G.
PMID: 26060342
Biol Sport. 2015 Jun;32(2):169-73. doi: 10.5604/20831862.1144420. Epub 2015 Mar 15.

Increasing numbers of dietary supplements with ecdysteroids are marketed as "natural anabolic agents". Results of recent studies suggested that their anabolic effect is mediated by estrogen receptor (ER) binding. Within this study the anabolic potency of ecdysterone was compared...

Showing 25 to 36 of 120 entries