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Cholera toxin B-subunit incorporation into synaptic vesicles of the neuromuscular junction of the rat

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Summary

The B-subunit of cholera toxin, a nontoxic macromolecule which binds specifically to GM1 ganglioside, was conjugated to colloidal gold and injected into skeletal muscle of the rat. It was taken up rapidly in vesicles in the terminal axons at the neuromuscular junctions. Injection of albumin-colloidal gold conjugates resulted in an insignificant uptake. The results indicate that uptake of extracellular macromolecules into the terminal axon of the neuromuscular junction may be greatly enhanced by binding to gangliosides at the presynaptic membrane, and that it may occur without association with vesicular recycling related to transmitter release.

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Authors and Affiliations

  1. Division of Neuropathology, Department of Pathology, Sahlgren Hospital, S-41345, Göteborg, Sweden

    A. Oldfors

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  1. A. Oldfors
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Additional information

The study was supported by grants from the Swedish Medical Research Council (proj. No. 07122).—Part of this study was performed at INSERM U-153, Paris, headed by Dr M. Fardeau.

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Oldfors, A. Cholera toxin B-subunit incorporation into synaptic vesicles of the neuromuscular junction of the rat. Experientia 42, 415–417 (1986). https://doi.org/10.1007/BF02118636

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