Physiological and Immunocytochemical Determination of the Neurotransmitter at Cricket Neuromuscular Junctions

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概要

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• An attempt was made to determine electrophysiologically and immunocytochemically the neurotransmitter at neuromuscular junctions (NMJs) in cricket abdominal muscles. One mM bath-applied L-glutamate reduced the amplitudes of large and small excitatory junctional potentials (l- and s-EJPs) reversibly by about 75% of the control on the average. It also produced a slow, transient depolarization of about 10 mV. Joro spider toxin, which is an antagonist of L-glutamate, depressed the amplitudes of l- and s-EJPs almost completely and irreversibly at 3.5 × 10^-6 M. By using the antibody to glutamate, glutamate-immunoreactive processes whose configuration resembled that of NMJs revealed by nickel staining were obtained. The present results strongly suggest that the neurotransmitter at cricket NMJs is L-glutamate.

• 社団法人日本動物学会の論文
• 1996-08-15

著者

• Kita H

  Kawasaki Univ. Med. Welfare Kurashiki

• Kawasaki Fumiko

  Department Of Obstertics And Gynecology Oita Medical University

• Kawasaki Fumiko

  Department Of Physiology Kawasaki Medical School

• Kita Hiroshi

  Department Of Biochemical Engineering And Science Kyushu Institute Of Technology

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