Chondroitin sulfate proteoglycan-immunoreactivity of lectin-labeled perineuronal nets around parvalbumin-containing neurons.

Perineuronal nets represent highly specialized glial and glia-associated structures. In this study, a triple fluorescence labeling of chondroitin sulfate proteoglycan-immunoreactive (CSPG-ir) and N-acetylgalactosamine (GalNac)-specific plant lectin Wisteria floribunda agglutinin (WFA) binding net components as well as parvalbumin-immunoreactivity (-ir) was performed. It was shown in the rat cortex, that the same nets frequently surrounding parvalbumin-ir neurons are stained by CSPG-ir as well as by the lectin binding method.