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Brain Res. 1993 Jan 15;600(2):339-44.

Co-localization of two calcium binding proteins in GABA cells of rat piriform cortex.

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Laboratory for Neural Systems, RIKEN, Saitama, Japan.


In the rat piriform cortex, double-fluorescence immunocytochemistry was used to study the coexistence of two calcium binding proteins, parvalbumin and calbindinD28k, and GABA. Layer I cells were immunoreactive only for GABA. In layer II a small number of cells were immunoreactive for all three substances. A few other cells contained only parvalbumin and GABA immunoreactivity. In layer III a subpopulation of calbindinD28k immunoreactive cells (about 60%) were also immunoreactive for both parvalbumin and GABA. The remainder showed only calbindinD28k and GABA immunoreactivity. Many immunoreactive terminals, which surrounded non-immunoreactive cell somata to form basket endings in layers II and III, were immunoreactive for all three substances. Their major source may be the non-pyramidal neurons in layer III, which contained the three chemical substances.

[Indexed for MEDLINE]

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