Accumulation of NO synthase (type-I) at the neuromuscular junctions in adult mice.
Recent data have shown that NOS-I is localized almost exclusively to the sarcolemma of fast-twitch fibers, where it probably interacts with the dystrophin-glycoprotein complex. The concentration of dystrophin-related protein at the neuromuscular junctions and the possible involvement of NO in synaptic suppression led us to investigate the presence of NOS-I at the adult motor endplates. Our data clearly show that NOS-I protein, detected by immunohistochemistry accumulates at the adult endplates. Furthermore, the absence of NOS-I protein at the denervated neuromuscular junctions suggest a neural origin of this enzyme. The putative roles of NO at the endplate are discussed.
Oliver
L
L
Centre de Gérontologie, Institut National de la Santé et de la Recherche Médicale, Association Claude-Bernard, Paris, France.
Goureau
O
O
Courtois
Y
Y
Vigny
M
M
D000818:Animals; D003714:Denervation; D007150:Immunohistochemistry; D051379:Mice; D008810:Mice, Inbred C57BL; D009469:Neuromuscular Junction / Q000201:enzymology*; D019001:Nitric Oxide Synthase / Q000378:metabolism*
D019001:Nitric Oxide Synthase