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Heparin blocks functional innervation of cultured human muscle by rat motor nerveMarš, Tomaž, 1972- ...In vitro innervated human muscle is the only experimental model to study synaptogenesis of the neuromuscular junction in humans. Cultured human muscle never contracts spontaneously but will if ... innervated and therefore is a suitable model to study the effects of specific neural factors on the formation of functional neuromuscular contacts. Here, we tested the hypothesisthat nerve derived factor agrin is essential for the formation of functional synapses between human myotubes and motoneurons growing from the explant of embryonic rat spinal cord. Agrin actions were blocked by heparin and the formation of functional neuromuscular contacts was quantitated. At a heparin concentration of 25 microg/ml, the number of functional contacts was significantly reduced. At higher concentrations, formation of such contacts was blocked completely. Except at the highest heparin concentrations (150 microg/ml) neuronal outgrowth was normal indicating that blockade of neuromuscular junction formation was not due to neuronal dysfunction. Our results are in accord with the concept that binding of neural agrin to the synaptic basal lamina is essential for the formation of functional neuromuscular junctions in the human muscle.Source: Pflügers Archiv : european journal of physiology. - ISSN 0031-6768 (Letn. 439, št. 3, suppl., 2000, str. R36-R37)Type of material - conference contributionPublish date - 2000Language - englishCOBISS.SI-ID - 11270873
Author
Marš, Tomaž, 1972- |
King, M... P. |
Miranda, A... F. |
Grubič, Zoran, 1948-
Topics
Neuromuscular junction |
Drug effects |
Muscle, skeletal |
Heparin |
Agrin |
Cells, cultured
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source: Pflügers Archiv : european journal of physiology. - ISSN 0031-6768 (Letn. 439, št. 3, suppl., 2000, str. R36-R37)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Marš, Tomaž, 1972- | 16345 |
Grubič, Zoran, 1948- | 04410 |
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