Detection of mucus glycoconjugates in human conjuctiva by using the lectin colloidal gold technique in TEM. I. A quantitative study in normal subjects

P. Versura, M. C. Maltarello, F. Bonvicini, R. Caramazza, R. Laschi

Research output: Contribution to journalArticle

Abstract

We applied a specific cytochemical reaction to characterize the glycoconjugates produced by goblet and non-goblet epithelial cells of normal human conjunctiva. For this purpose we utilized the lectins, proteins of vegetal origin, which are extremely sensitive in binding glycosidic residues. In particular, we used WGA, PNA, SBA and ConA conjugated with colloidal gold as ultrastructural marker for Transmission Electron Microscopy. This technique allowed us also to perform a quantitative analysis, by counting colloidal gold particles present on mucus granules. In this way we analyzed the content both of goblet and non-goblet epithelial cells. In the former, WGA, PNA, SBA and ConA receptors, here reported in decreasing density, were present. In the latter WGA was always positive, SBA and PNA sometimes were negative, ConA was always negative. We speculate the different contribution to mucus production by these two sources may be important in evaluating tear film stability alterations occurring in those diseases in which non-goblet epithelial cell vesicles increase.

Original languageEnglish
Pages (from-to)445-450
Number of pages6
JournalActa Ophthalmologica
Volume64
Issue number4
Publication statusPublished - 1986

ASJC Scopus subject areas

  • Ophthalmology

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