Brain Facts: A Primer on the Brain and Nervous System by The Society for Neuroscience

By The Society for Neuroscience

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Kiehart for access to valuable resources and critical comments. -M. K. This award is supported by a MARC grant from the NIH NIGMS to the American Society for Cell Biology Minorities Affairs Committee. References Abrell S and Jackle H (2001) Axon guidance of Drosophila SNb motoneurons depends on the cooperative action of muscular Kruppel and neuronal capricious activities. Mech Dev 109:3–12 Ackley BD, Kang SH, Crew JR et al. (2003) The basement membrane components nidogen and Type XVIII collagen regulate organization of neuromuscular junctions in Caenorhabditis elegans.

3 CAMs and Axon–Muscle Adhesion ECM deposition begins during early embryonic stages (Lunstrum et al. 1988, Mirre et al. 1988), even before the muscle cell pattern is established (see below). It is therefore likely that the interaction of a growth cone with the muscle surface is mediated by the ECM. Therefore, axon–muscle adhesion may not directly contribute to the establishment of the presynaptic cell pattern formation, but instead ECM interaction plays a larger role than previously considered.

Or do intracellular events result in the clustering of CAMs at the site of synapse formation? According to the model we present below, a combination of both events may contribute to the successful genesis of the Drosophila neuromuscular synapse. 5 CAMs Mediate FORCES By mutual and exclusive adhesion, CAMs are the ideal candidates to initiate intracellular signaling after the correct synaptic partner has been found. Recently, we have observed that muscles start to contract even before they become innervated (Siechen et al.

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