Phe-Gly-Leu-amide allatostatin in the termite Reticulitermes flavipes: Content in brain and corpus allatum and effect on juvenile hormone synthesis
| Autor: | Koichiro J. Yagi, K.K. Chan, Timothy G. Myles, Rodney Kwok, R.R. Setter, Barbara Stay, Stephen S. Tobe |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
endocrine system
medicine.medical_specialty animal structures Physiology Immunocytochemistry Neuropeptide Isoptera digestive system Reticulitermes fluids and secretions Corpora Allata Internal medicine biology.animal medicine Animals Cockroach biology Neuropeptides Brain Allatostatin Radioimmunoassay biology.organism_classification Immunohistochemistry digestive system diseases Juvenile Hormones Endocrinology Insect Science Juvenile hormone Corpus allatum |
| Zdroj: | Journal of Insect Physiology. 51:357-365 |
| ISSN: | 0022-1910 |
| Popis: | In the subterranean termite Reticulitermes flavipes, allatostatins (ASTs) with the C-terminus Phe-Gly Leu-amide were localized by immunocytochemistry with antibody against a cockroach AST, Dippu AST-7. AST-immunoreactivity occurred in the corpus cardiacum and corpus allatum and in the lateral and medial neurosecretory cells of the brain that innervate these organs as well as in many other nerve cells of the brain. This was observed in workers, nymphs, soldiers and secondary reproductives. A radioimmunoassay, using anti-Dippu AST-11, demonstrated about 40 fmole equivalents of AST in brains of soldiers and secondary reproductives. The product of the corpora allata in this species was determined to be juvenile hormone III. Its synthesis by corpora allata of secondary reproductives, determined by in vitro radiochemical assay, was inhibited in a dose-dependent fashion by two cockroach allatostatins, Dippu AST-7 and Dippu AST-11. Thus, as in cockroaches and crickets, allatostatin-containing nerves innervate the corpora allata of this termite species and their production of juvenile hormone is inhibited by these neuropeptides. |
| Databáze: | OpenAIRE |
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