期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1978
卷号：75
期号：1
页码：515-519
DOI：10.1073/pnas.75.1.515
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Transmitter release at the Drosophila larval neuromuscular junction may be increased by previous activity of the nerve. This facilitation phenomenon involves at least two processes, one short-term and other long-term. These are shown to based on different mechanisms because (i) a mutant was found that had abnormal long-term facilitation but normal short-term facilitation; and (ii) long-term facilitation was eliminated by tetrodotoxin or by removing external Na+ but short-term facilitation was not. In long-term facilitation, there was a prolonged release of transmitter due to a prolonged Ca2+ sensitivity of the presynaptic terminal after each nerve stimulus. The cause of this is probably accumulation of Na+ inside the nerve terminal.
