Saber UCV
Repositorio Institucional
Repositorio Institucional
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https://saber.ucv.ve/handle/10872/13856
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| Title: | Immunogold Staining Procedure for the Localisation of Regulatory Peptides |
| Authors: | Varndell, I.M. Tapia, Félix J. Probert, L. Buchan, A. M. J. Gu, Jiang De Mey, J. Bloom, S. R. Polak, J. M. |
| Keywords: | lmmunogold staining methods Regulatory peptides Light microscopy Electron microscopy Protein A-gold Molecular forms P-type heterogeneity Co-localisation |
| Issue Date: | 1982 |
| Publisher: | Peptides |
| Series/Report no.: | Vol. 3;Nº 3 pp. 259-272 |
| Abstract: | The use of protein A- and IgG-conjugated colloidal gold staining methods for the immuno-localisation of peptide hormones and neurotransmitters at light - and electron microscope level are described and discussed. Bright-field and dark-ground illumination modes have been used to visualise the gold-labelled antigenic sites at the light microscope level. Immunogold staining procedures at the ultrastructural level using region-specific antisera have been adopted to localise specific molecular forms of peptides including gastrin (G17 and G34), glucagon and pro-glucagon, insulin and pro-insulin, in normal tissue and in tumours of the gastroenteropancreatic system. Similar methods have been used to demonstrate the heterogeneity of p-type nerves in the enteric nervous system. Vasoactive intestinal polypeptide (VIP) has been localised to granular sites (mean±S.D. granule diameter=98 ± 19 nm) in nerve terminals of the enteric plexuses and in tumour cells of diarrhoeogenic VIP•producing neoplasias (mean ±S.D granule diameter=126 ± 37 nm) using immunogold procedures applied to ultraviolet-cured ultrathin sections. Co-localisation of amines and peptides in carotid body type I cells and in chromaffin cells of normal adrenal medulla and phaeochromocytomas has also been demonstrated. Advantages of the immunogold procedures over alternative immunocytochemical techniques are discussed. |
| URI: | http://hdl.handle.net/10872/13856 |
| ISSN: | 0196-9781 |
| Appears in Collections: | Artículos Publicados |
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