An ecdysteroid (22-acetyl-20-hydroxyecdysone) from the defense gland secretion of an insect: Chrysolina carnifex (Coleoptera: Chrysomelidae)

Praly, Laurent; Braekman, Jean‐Claude; Daloze, Désiré; Pasteels, Jacques

doi:10.1007/s00049-003-0235-3

Cited by 12 publications

(1 citation statement)

References 28 publications

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“…In the latter case, it was clearly demonstrated that ecdysteroids are stored within the epidermis and released through cuticular holes into the surrounding water when the animal is attacked (by a crab), which results in an efficient deterrent/antifeedant effect (Tomaschko 1994;. This function appears similar to that of phytoecdysteroids used as a plant protection against phytophagous insects (Dinan 2001) and has also been found in an insect, Chrysolina carnifex (Coleoptera: Chrysomelidae) as a protection against spiders (Laurent et al 2003).…”

Section: Coelenterates and Spongesmentioning

confidence: 85%

Steroids in aquatic invertebrates

2007

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Steroid molecules are present in all invertebrates, and some of them have established hormonal roles: this is the case for ecdysteroids in arthropods and, to a lesser extent, for vertebrate-type steroids in molluscs. Steroids are not only hormones, they may also fulfill many other functions in chemical communication, chemical defense or even digestive physiology. The increasing occurrence of endocrine disruption problems caused by environmental pollutants, which interfere in particular with reproductive physiology of vertebrates but also of invertebrates has made necessary to better understand the endocrine physiology of the latter and the role of steroids in these processes. So many attempts are being made to better understand the endocrine roles of steroids in arthropods and molluscs, and to establish whether they also fulfill similar functions in other invertebrate phyla. At the moment, both the precise identification of these steroids, the determination of their origin (endogenous versus exogenous) and of their mechanism of action are under active investigation. This research takes profit of the development of genome sequencing programs on many invertebrate species, which allow the identification of receptors and/or biosynthetic enzymes, when related to their vertebrate counterparts, but the story is not so simple, as will be exemplified by estrogen receptors of molluscs.

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Section: Coelenterates and Spongesmentioning

confidence: 85%