Regulation of the size and distribution of agrin-induced postsynaptic-like apparatus in adult skeletal muscle by electrical muscle activity. Academic Article

abstract

• We compared actylcholine receptor (AChR) aggregates induced by neural agrin released from transfected muscle fibers with AChR aggregates induced by transplanted axons in extrajunctional regions of denervated rat soleus muscles. Both neural agrin and transplanted axons induced multiple, irregularly distributed AChR aggregates on muscle fibers. Direct electrical muscle stimulation of transfected muscles for up to 10 weeks removed all agrin-induced AChR aggregates (the losers) except one (the winner) on many fibers. Axon-induced AChR aggregates underwent comparable selection of winners and losers. The results suggest that agrin and acetylcholine-driven muscle activity provided by transplanted axons are sufficient to elicit in a denervated adult muscle fiber processes that regulate the size and distribution of ectopic neuromuscular junctions.

authors

• Mcmahan, Uel
• Rimer, Mendell

published proceedings

• Mol Cell Neurosci

altmetric score

• 3

author list (cited authors)

• Mathiesen, I., Rimer, M., Ashtari, O., Cohen, I., McMahan, U. J., & Lmo, T.

citation count

• 19

complete list of authors

• Mathiesen, I||Rimer, M||Ashtari, O||Cohen, I||McMahan, UJ||Lømo, T

publication date

• March 1999

publisher

• Elsevier  Publisher

published in

• Molecular and Cellular Neuroscience  Journal

keywords

• Agrin
• Animals
• Electric Stimulation
• Electrophysiology
• Male
• Muscle, Skeletal
• Rats
• Rats, Wistar
• Receptor Aggregation
• Receptors, Cholinergic
• Transfection

PubMed Central ID

• 10328882

Digital Object Identifier (DOI)

• 10.1006/mcne.1999.0744

start page

• 207

end page

• 217

volume

• 13

issue

• 3

URL

• http://dx.doi.org/10.1006/mcne.1999.0744