Immunofluorescence and glutaraldehyde fixation. A new procedure based on the Schiff-quenching method

P. Tagliaferro, C. J. Tandler, A. J. Ramos, J. Pecci Saavedra, A. Brusco

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41 Scopus citations

Abstract

The immunofluorescence technique is one of the most useful methods for localizing antigens in several tissues, including the central nervous system. For immunohistochemical procedures, especially immunofluorescence methods, formaldehyde is commonly used as a fixative agent. But for some protocols, mainly in neurobiology, glutaraldehyde is necessary to recognize a number of small molecules (haptens) whose antisera have been raised using glutaraldehyde as the cross-linking agent. This is a severe limitation because glutaraldehyde gives rise to a strong autofluorescence on tissue that precludes the observation of specific immunofluorescence staining. In this paper we present a new method that allows the use of immunofluorescence techniques on glutaraldehyde-fixed tissues. The new method consists of a treatment of tissue sections with the Schiff's reagent (leucobasic fuchsin) followed by a reduction of the Schiff-dye with sodium borohydride. This reduced dye produces a quenching of glutaraldehyde-induced fluorescence on the tissue. The goal of the new method is to make possible the use of a great number of available glutaraldehyde-raised antisera for immunofluorescence techniques, a useful tool in both basic and clinical research.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalJournal of Neuroscience Methods
Volume77
Issue number2
DOIs
StatePublished - 1 Dec 1997

Keywords

  • Antibodies
  • Autofluorescence
  • Fluorescein
  • Glutaraldehyde
  • Immunofluorescence
  • Schiff- reagent

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