Isolation of cockroach Phe–Gly–Leu–amide allatostatins from the termite Reticulitermes flavipes and their effect on juvenile hormone synthesis

Immunoreactivity to cockroach Diploptera punctata allatostatin-7 (Dippu AST-7) has been demonstrated previously in axons innervating the corpora allata of the termite Reticulitermes flavipes. This peptide and Dippu AST-11 inhibited juvenile hormone (JH) synthesis by corpora allata (CA) of brachypter...

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Bibliographic Details
Published in:Journal of insect physiology 2008-06, Vol.54 (6), p.939-948
Main Authors: Yagi, K.J., Elliott, K.L., Teesch, L., Tobe, S.S., Stay, B.
Format: Article
Language:English
Subjects:
Allatostatin
Animals
biochemical pathways
Brain Chemistry
Chromatography, High Pressure Liquid
Cockroach
Cockroaches - drug effects
Cockroaches - metabolism
corpora allata
Corpora Allata - drug effects
Corpora Allata - metabolism
Diploptera punctata
hormone secretion
inhibitors
insect pests
Isoptera
Isoptera - drug effects
Isoptera - metabolism
Juvenile hormone
juvenile hormones
Juvenile Hormones - antagonists & inhibitors
Juvenile Hormones - biosynthesis
Neuropeptides - isolation & purification
Neuropeptides - pharmacology
Periplaneta americana
plant pests
Reticulitermes flavipes
species differences
Species Specificity
subterranean termites
Tandem Mass Spectrometry
Termite
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Summary:Immunoreactivity to cockroach Diploptera punctata allatostatin-7 (Dippu AST-7) has been demonstrated previously in axons innervating the corpora allata of the termite Reticulitermes flavipes. This peptide and Dippu AST-11 inhibited juvenile hormone (JH) synthesis by corpora allata (CA) of brachypterous neotenic reproductives (secondary reproductives) of termites. The present study shows that R. flavipes CA are also inhibited by Dippu AST-2, AST-5, AST-8, and AST-9 at approximately the same rank order of potency as demonstrated in D. punctata. Another allatostatin from Periplaneta americana (Peram AST-12) also inhibits JH synthesis by R. flavipes CA. Sensitivity to the allatostatins is higher in glands with low rates of JH synthesis than in those with relatively high JH synthetic rates as has been demonstrated in CA from male and female secondary reproductives as well as in those from non-egg-laying and egg-laying females. The identical inhibitory effects of R. flavipes brain extract on CA from both D. punctata and R. flavipes and the isolation and identification of five cockroach allatostatins (Dippu AST-1, AST-2, AST-5, AST-8, and Peram AST-12) from termite brain extract reflect the close relationship between cockroaches and termites.
ISSN:0022-1910
1879-1611
DOI:10.1016/j.jinsphys.2008.01.013