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Neurosci Lett. 1993 Sep 3;159(1-2):111-4.

Prion protein is strongly immunolocalized at the postsynaptic domain of human normal neuromuscular junctions.

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1
Department of Neurology, University of Southern California School of Medicine, Los Angeles 90017-1912.

Abstract

Using three well-characterized polyclonal and monoclonal antibodies against prion protein (PrP), we demonstrated a strong concentration of PrP at human neuromuscular junctions (NMJs). Applying double and triple fluorescence-labeling, we found that PrP immunoreactivity exactly co-localized with alpha-bungarotoxin (alpha-BT) identified acetylcholine receptors, as well as with the high junctional concentrations of beta-amyloid precursor protein, beta-amyloid protein, desmin, ubiquitin and dystrophin. Therefore, PrP was considered to be located on the postsynaptic muscle membrane. At all NMJs identified by bound alpha-BT, strong PrP immunoreactivity was obtained with all PrP antibodies. This appears to be the first demonstration of PrP concentrated at human NMJs.

PMID:
8264949
[Indexed for MEDLINE]

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