A restaining method to restore fluorescence in faded preparations of tissues treated with the indirect immunofluorescence technique.

We report a restainin method for restoring fluorescence in paraffin-embedded tissue sections previously treated with the indirect immunofluorescence technique. Antisera to gastrin and group II pepsinogens were used. Fluorescence was restored in completely faded sections retrived from storage files, as well as in sections that had faded partially either with exposure to fluorescence microscope illumination or after counterstaining with hematoxylin and eosin.