Effect of ionotropic glutamate receptor antagonists on Fos-like immunoreactivity in the dorsal horn following transection of the rat sciatic nerve.
Fos-like immunoreactivity (FLI) was investigated in the lumbar dorsal horn 2 h after transection of the rat sciatic nerve and sham operation. FLI following nerve transection was distributed through the medio-lateral extension of the superficial layer of the dorsal horn, while FLI after sham operation, tissue injury, was restricted to the lateral one-third of this layer. The number of FLI neurons in the lateral one-third was similar in the two operations, indicating that neurons expressing FLI in the medial two-thirds and in the lateral one-third of the superficial layer after nerve transection are derived from nerve injury and tissue injury, respectively. FLI in the lateral one-third, but not the medial two-thirds, after nerve transection was significantly reduced by pretreatment with NMDA and AMPA/KA receptor antagonists, indicating that there is a considerable difference in the contributions of ionotropic glutamate receptors to FLI in this layer induced by nerve injury and tissue injury.
Nishimori
Toshikazu
T
Division of Biology, Miyazaki Medical College, Kiyotake, Miyazaki 889-1692, Japan. ntoshi@post1.miyazaki-med.ac.jp
Ikeda
Tetsuya
T
Terayama
Ryuji
R
Ishida
Yasushi
Y
Nakamura
Tadashi
T
Otahara
Noriko
N
D000344:Afferent Pathways / Q000293:injuries / Q000378:metabolism* / Q000503:physiopathology; D000818:Animals; D018691:Excitatory Amino Acid Antagonists / Q000494:pharmacology; D005727:Ganglia, Spinal / Q000293:injuries / Q000378:metabolism* / Q000503:physiopathology; D018698:Glutamic Acid / Q000378:metabolism; D007150:Immunohistochemistry; D008297:Male; D009409:Nerve Crush; D009619:Nociceptors / Q000293:injuries / Q000378:metabolism* / Q000503:physiopathology; D010146:Pain / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D010523:Peripheral Nervous System Diseases / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D020671:Posterior Horn Cells / Q000187:drug effects / Q000378:metabolism* / Q000503:physiopathology; D016760:Proto-Oncogene Proteins c-fos / Q000187:drug effects / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D018091:Receptors, AMPA / Q000037:antagonists & inhibitors / Q000378:metabolism; D017470:Receptors, Glutamate / Q000187:drug effects / Q000378:metabolism*; D016194:Receptors, N-Methyl-D-Aspartate / Q000037:antagonists & inhibitors / Q000378:metabolism; D012584:Sciatic Nerve / Q000276:immunology / Q000378:metabolism* / Q000503:physiopathology; D009435:Synaptic Transmission / Q000187:drug effects / Q000502:physiology; D015854:Up-Regulation / Q000187:drug effects / Q000502:physiology
D018691:Excitatory Amino Acid Antagonists; D016760:Proto-Oncogene Proteins c-fos; D018091:Receptors, AMPA; D017470:Receptors, Glutamate; D016194:Receptors, N-Methyl-D-Aspartate; D018698:Glutamic Acid