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We have investigated the organization, on the plasma membrane and in detergent-insoluble membrane vesicles, of two neuronal glycosylphosphatidylinositol-anchored (GPI) proteins: Thy-1, a negative regulator of transmembrane signalling; and prion protein, whose rapid endocytosis and Cu(2+) binding suggest that it functions in metal ion uptake. Prion protein(More)
The distribution of Thy-1 in the retina and optic nerve has been examined immunohistochemically, and compared to that of the astrocytic marker glial fibrillary acidic protein. The axons and cell bodies of ganglion cells were found to be Thy-1 positive as were processes within the inner plexiform layer. Transection of the optic nerve in the neonatal rat(More)
The glycoprotein Thy-1 is found on the surface of both neurons, and most fibroblasts, in tissue culture of embryonic or neonatal rat nervous tissue. In adult rat nerves, however, we find the antigen restricted in vivo to neurons and their axons (R. Morris, P. Barber, J. Beech, and G. Raisman, 1983, J. Neurocytol., 12, 1017-1039). We show here that this(More)
Expression of the neuronal cell surface glycoprotein Thy-1 has been studied during the development of the olfactory bulb in mice and rats, using in situ hybridisation and immunohistochemistry to follow the appearance of Thy-1 mRNA and protein, respectively. The mRNA was first detected 4 days before birth on all mitral cells, the main projection neuron of(More)
The level of expression of normal cellular prion protein, PrP(c) (cellular prion protein), controls both the rate and the route of neuroinvasive infection, from peripheral entry portal to the CNS. Paradoxically, an overview of the distribution of PrP(c) within tissues outside the CNS is lacking. We have used novel antibodies that recognise cellular prion(More)
THY-1, the smallest member of the immunoglobulin superfamily, is a major cell-surface component expressed by several tissues. The protein, carbohydrate and gene structures of this molecule are known, yet its function is not. It is highly expressed in nervous tissue, where it appears on virtually all neurons after the cessation of axonal growth. Here we show(More)
The cell surface glycoprotein, Thy-1, is present on Purkinje cells at birth, so allowing Thy-1 immunohistochemistry to demonstrate the final stage of migration and the transition to dendritic growth of these cells. In the most caudal lobule of the cerebellar cortex of the newborn rat, migrating Purkinje cells are found. These have a prominent process (up to(More)
Foetal mouse hippocampal primordia from mice homozygous for the Thy-1.1 allele were transplanted into the hippocampal region of adult histocompatible mice, homozygous for the Thy-1.2 allele. After survival periods of two months to one year the transplants consisted of a discrete tissue mass, well fused with the host, and distinguished from it by an intense(More)
Embryonic rat hippocampal primordia from class I and class II major histoincompatible donors were transplanted into the hippocampus of adult rat hosts. The allografts were rejected by a specific host immune response, which was identified by reference to events at a histocompatible hippocampal primordial graft (syngeneic to the host) of similar embryonic age(More)
The related neuronal surface glycoproteins, Thy-1 and OX2, are shown here to have a reciprocal pattern of expression during development in rat cerebellum. OX2 appears at axonogenesis, on neuronal cell bodies and their axons. Immunohistochemical staining for this molecule then gradually wanes, and over the same period the cells acquire their first, weak(More)