Abstract
Fragments of normal embryonic cerebellum were transplanted into adult Quaking mice to examine using peroxidase-antiperoxidase immunocytochemistry the development of genetically normal tissue in an abnormal host environment. The Quaking mouse animals used as hosts are characterized by defective myelin associated glycoprotein. Normal characteristic expression and distribution of neurofilaments was observed in the cerebellar grafts. Nonphosphorylated epitopes of neurofilaments were seen in Purkinje cell bodies and dendrites. The phosphorylated epitopes of neurofilaments were observed in basket cell axons. Phosphorylated epitopes were also present in numerous myelinated axons, which were probably fibers from deep cerebellar nuclei. These data support the notion that neurogenesis with alternative connections can occur in transplants. Staining patterns with myelin associated glycoprotein and myelin basic protein also suggest that normal myelination occurs in grafts transplanted to the brains of Quaking mice.
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