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Phenylalanylmethionylarginylphenylalaninamide like and pancreatic polypeptide like immunoreactivity of endocrine cells in the midgut of a mosquito aedes aegypti


, : Phenylalanylmethionylarginylphenylalaninamide like and pancreatic polypeptide like immunoreactivity of endocrine cells in the midgut of a mosquito aedes aegypti. Tissue & Cell 18(3): 419-428

Immunocytochemical surveys of midguts from female mosquitoes, Aedes aegypti, reveal that half of the estimated 500 endocrine cells in a midgut contain a substance recognized by antisera to bovine pancreatic polypeptide and a molluscan peptide. FMRF-amide (phenylalanine-methionine-arginine-phenylalanine-amide). With light microscopy the cells resemble an endocrine type because of their basal position in the epithelium, conical shape, and, in some instances, apical extensions to the lumen. At the ultrastructural level, the immunoreactive substance is contained specifically within the secretory granules of such cells. Immunoreactive cells are distributed exclusively in the midgut region where blood is stored, and ingestion of vertebrate blood reduces the number of such cells and the intensity of reaction in others. These two facts suggest that a blood meal stimulates release of the immunoreactive substance from the cells. Since the immunocytochemical localization is supplemented by a demonstrated secretory response, the cells are considered to be peptidergic endocrine cells.


Accession: 006102408

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Related references

Brown, M.R.; Crim, J.W.; Lea, A.O., 1986: FMRFamide- and pancreatic polypeptide-like immunoreactivity of endocrine cells in the midgut of a mosquito. Immunocytochemical surveys of midguts from female mosquitoes, Aedes aegypti, reveal that half of the estimated 500 endocrine cells in a midgut contain a substance recognized by antisera to bovine pancreatic polypeptide and a molluscan peptide. FMR...

Brown, M.R.; Raikhel, A.S.; Lea, A.O., 1985: Ultrastructure of midgut endocrine cells in the adult mosquito, Aedes aegypti. The ultrastructure of endocrine cells in the midgut of the adult mosquito, Aedes aegypti, resembled that of endocrine cells in the vertebrate gastro-intestinal tract. Midgut endocrine cells, positioned basally in the epithelium as single cells, we...

Brown, MR.; Lea, AO., 1984: Endocrine cells in the midgut of Aedes aegypti. International Congress of Entomology Proceedings, 17: 106

Lea, AO.; Brown, MR., 1984: Endocrine-like cells in the midgut of Aedes aegypti. Unknown

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