Abstract
Objective To investigate the immunoreactivity of platelet-derived growth factor-A (PDGF-A) and its receptor at human and mouse neuromuscular junctions and to explore their regulatory effects on neuromuscular junctions. Methods Specific polyclonal antibodies were used to detect PDGF-A and PDGF a-receptor expression. Double immunohistochemistry for platelet-derived growth factor and the acetylcholine receptor was performed on normal human muscle biopsy specimens. Double fluorescence labeling was applied to detect immunoreactivity for PDGF-A, its receptor and acetylcholine receptors. Results PDGF-A and its receptor was closely co-localized with acetylcholine receptors at human and mouse neuromuscular junctions. Conclusion PDGF-A and its receptor concentrated at human and mouse neuromuscular junctions. PDGF might be involved in the interaction between the presynaptic and postsynaptic components, PDGF-A and its receptor might play regulatory role in signaling at neuromuscular junctions in normal muscle. Key words: Platelet-derived growth factor; Receptor; Neuromuscular junction
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