An immunohistochemical study on the ontogeny of cells immunoreactive for spot 35 protein, a novel Purkinje cell-specific protein, in the rat cerebellum.
A time course study on the appearance and distribution of cells immunoreactive for spot 35 protein, a novel cerebellar Purkinje cell-specific protein, was conducted in the developing cerebella of fetal and early postnatal rats by PAP immunohistochemistry. Spot 35-immunoreactive cells were first noted in the cerebellar anlage on the 17th embryonic day, appearing as large cellular aggregations in the mantle layer and a small number of elongated cells dispersed between the cell aggregations and the ependymal layer. As the development proceeded, the spot 35-immunoreactive cells gradually accumulated beneath the external granular layer. At birth, they were arranged compactly in 4-5 irregular rows to form a primitive Purkinje cell layer. During their subsequent development, immunostaining for spot 35 protein demonstrated the rearrangement of the Purkinje cells into a single row and the maturation of their somata, axons and dendrites. All these findings indicate that spot 35 protein is a specific marker for the cerebellar Purkinje cells, from their migrating stage throughout the course of their maturation. The present study further describes the transitory lamellar arrangement of spot 35-immunoreactive Purkinje cells located horizontally at a short distance away from the ependymal layer of the cerebellum on the 17th embryonic day.
D000818:Animals; D064092:Calbindin 1; D064026:Calbindins; D002135:Calcium-Binding Proteins; D002454:Cell Differentiation; D002531:Cerebellum / Q000196:embryology / Q000254:growth & development / Q000378:metabolism*; D005260:Female; D007124:Immunoenzyme Techniques; D008297:Male; D009419:Nerve Tissue Proteins / Q000378:metabolism*; D011689:Purkinje Cells / Q000166:cytology / Q000378:metabolism; D051381:Rats; D064030:S100 Calcium Binding Protein G
C576500:Calb1 protein, rat; D064092:Calbindin 1; D064026:Calbindins; D002135:Calcium-Binding Proteins; D009419:Nerve Tissue Proteins; D064030:S100 Calcium Binding Protein G