Diversity of detoxification pathways of ingested ecdysteroids among phytophagous insects

The metabolic pathways of ingested ecdysteroids have been investigated in three insect species, the aphid Myzus persicae and two Lepidoptera, Plodia interpunctella and Ostrinia nubilalis. M. persicae produces mainly a 22-glucoside conjugate, whereas P. interpunctella eliminates a mixture of 20E and...

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Veröffentlicht in:	Archives of insect biochemistry and physiology 2007-06, Vol.65 (2), p.65-73
Hauptverfasser:	Rharrabe, K, Alla, S, Maria, A, Sayah, F, Lafont, R
Format:	Artikel
Sprache:	eng
Schlagworte:	20-hydroxyecdysone Animals Aphids - metabolism biochemical pathways detoxification dietary exposure ecdysone Ecdysone - pharmacokinetics ecdysteroid metabolism ecdysteroids ecdysterone Ecdysterone - chemistry Ecdysterone - pharmacokinetics Esterases - metabolism fatty acid esters Feces - chemistry Inactivation, Metabolic - physiology insect Larva - metabolism Lepidoptera Lepidoptera - metabolism metabolic detoxification Myzus persicae Ostrinia nubilalis phytophagous insects Plodia interpunctella species differences Time Factors Tritium - analysis
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Zusammenfassung:	The metabolic pathways of ingested ecdysteroids have been investigated in three insect species, the aphid Myzus persicae and two Lepidoptera, Plodia interpunctella and Ostrinia nubilalis. M. persicae produces mainly a 22-glucoside conjugate, whereas P. interpunctella eliminates a mixture of 20E and its 3-oxo and 3-epi derivatives, both in free form and as conjugates with various fatty acids. O. nubilalis only produces fatty acyl ester conjugates. These data point out the great diversity of detoxification mechanisms used by phytophagous insects in order to overcome the potential harmful effects of ecdysteroids present in their food.
ISSN:	0739-4462 1520-6327
DOI:	10.1002/arch.20191