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- Document 0324
- DOCN M9610324
- TI Toxicology of cupric salts on honeybees. IV--Gluconate and sulfate
- action on hemolymph trehalose activity in vivo and in vitro.
- DT 9601
- AU Nectoux M; Bounias M; Popeskovic D; INRA Phytopharmacy Department,
- University of Avignon, France.
- SO J Biochem Toxicol. 1995 Apr;10(2):79-86. Unique Identifier : AIDSLINE
- MED/96035095
- AB A biphasic increase of hemolymph glucose levels was observed following
- injection to bees of cupric gluconate or sulfate, both potent agents for
- the control of Varroa jacobsoni, a parasitic mite of hives. The
- simultaneous injection to bees of 0.3 microM BAYg5421 (an inhibitor of
- alpha-glucosidases) quenched the response, suggesting a direct effect of
- 2 nmol/bee cupric ions on trehaloses' activity. One nanomol of injected
- cupric gluconate increased the trehalose (Tre) activity by 233% in crude
- hemolymph extracts at 1 mM trehalose concentration, and exhibited
- biphasic dose-related effects with a maximum 15% increase at 0.5 mM
- cupric ion and a stabilized 20% inhibition from 4 mM, regardless of the
- anionic moiety. Upon partial purification of the enzyme complex, two
- fractions (FI = 75% and FII = 25% of total activity) were isolated that
- exhibited, respectively, less and more marked positive cooperatively
- than crude extract. Form I showed almost no susceptibility to either
- cupric derivatives, which indicated form II as the most likely target,
- with 68% and 72% increases with 0.25 mM cupric sulfate and 0.5 mM cupric
- gluconate, in presence of 16 mM trehalose.
- DE Animal Bees/DRUG EFFECTS/*PHYSIOLOGY Copper/*TOXICITY Female
- Gluconates/*TOXICITY Hemolymph/METABOLISM Hypoglycemic
- Agents/PHARMACOLOGY Kinetics Regression Analysis
- Trehalose/*METABOLISM Trisaccharides/PHARMACOLOGY JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
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