Peptidies related to the Diploptera punctata allatostatins in nonarthropod invertebrates: An immunocytochemical survey
✍ Scribed by D. Smart; C. F. Johnston; W. J. Curry; R. Williamson; A. G. Maule; P. J. Skuce; C. Shaw; D. W. Halton; K. D. Buchanan
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 946 KB
- Volume
- 347
- Category
- Article
- ISSN
- 0021-9967
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✦ Synopsis
The allatostatins are a family of peptides isolated originally from the cockroach, DipZoptera punctata. Related peptides have been identified in Periplaneta americana and the blowfly, Calliphora uomitoria. These peptides have been shown to be potent inhibitors of juvenile hormone synthesis in these species. A peptide inhibitor of juvenile hormone biosynthesis has also been isolated from the moth, Manduca sexta; however, this peptide has no structural homology with the D. punctata-type allatostatins. Investigations of the phylogeny of the D. punctata allatostatin peptide family have been started by examining a number of nonarthropod invertebrates for the presence of allatostatin-like molecules using immunocytochemistry with antisera directed against the conserved C-terminal region of this family. Allatostatin-like immunoreactivity (ALIR) was demonstrated in the nervous systems of Hydra oligactis (Hydrozoa), Moniezia expansa (Cestoda), Schistosoma mansoni (Trematoda), Artioposthia triangulata (Turbellaria), Ascaris suum (Nematoda), Lumbricus terrestris (Oligochaeta), Limax pseudoflauus (Gastropoda), and Eledone cirrhosa (Cephalopoda). ALIR could not be demonstrated in Ciona intestinalis (Ascidiacea). These results suggest that molecules related to the allatostatins may play an important role in nervous system function in many invertebrates as well as in insects and that they also have an ancient evolutionary lineage.