ISSN:
0739-4462
Keywords:
neuropeptide inhibitors
;
antennal heart nerve
;
immunocytochemistry
;
HPLC
;
Chemistry
;
Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
Notes:
The presence of allatostatins in the nerves of the antennal pulsatile organ muscle of the cockroach Diploptera punctata was confirmed by immunocytochemistry, bioassay, and HPLC. Immunocytochemical reactivity with monoclonal antibody against allatostatin I showed strong allatostatin immunoreactivity in the antennal heart nerve which innervates this muscle with varicostities along the muscle fibers and in the insertion of the muscle on the pulsatile ampullae. Bioassay of Sep-Pak purified muscle extract demonstrated inhibition of juvenile hormone synthesis by corpora allata in vitro. A dose-response curve showed maximum inhibition of juvenile hormone synthesis was achieved with 10-20 pulsatile organ muscle eq/corpora allata, and 50% inhibition achieved with an estimated 2.6 pulsatile organ muscle eq. Two successive HPLC separations of the Sep-Pak purified extract yielded bioactive fractions corresponding to the elution times of the five known allatostatins. © 1992 Wiley-Liss, Inc.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/arch.940200403
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