publication . Article . 2008

Apolar conjugates of ecdysteroids are not used as a storage form of molting hormone in the argasid tick Ornithodoros moubata

Connat, Jean-Louis; Dotson, Ellen Marie; Diehl, Peter A.;
Open Access English
  • Published: 04 Jun 2008
  • Country: Switzerland
Abstract
Fifth (last) instar nymphs of the tick <i>Ornithodoros moubata</i> convert ingested 20-hydroxyecdysone (20E) to apolar conjugates AP2, which are then converted to the more polar conjugates AP1. Only small quantities of free hormone were transferred to the hemolymph and the carcass within the first 2 days after the blood meal. The proportion of radiolabel in these two compartments was highest at the time of the endogenous ecdysteroid peak; however, no traces of free [<sup>3</sup>H]20E were detected. The conversion probably occurs principally in the intestinal cells. Eleven days after ingestion, 84% of the radiolabel is located in the digestive tract, mainly in th...
Subjects
Medical Subject Headings: fungiintegumentary system
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