The colocalization of CGRP receptor and AMPA receptor in the spinal dorsal horn neuron of rat: a morphological and electrophysiological study.
Both the calcitonin gene-related peptide (CGRP) receptor and alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptor are involved in the transmission of sensory information from primary afferent to the spinal cord. The present study found that there was a colocalization of CGRP receptor and AMPA receptor in a single spinal dorsal horn neuron in rat determined by double immunofluorescence labeling image methods. Furthermore, our results showed that the evoked discharge frequency of the wide dynamic range (WDR) neuron, one type of the dorsal horn neurons, increased significantly after micro-iontophoretic delivery of CGRP or AMPA alone tested by extracellular recording, indicating a functional colocalization of CGRP receptor and AMPA receptor in a single spinal dorsal horn neuron. The results of the present study found a morphological and functional colocalization of the CGRP receptor and AMPA receptor in a single dorsal horn neuron that involved in the transmission and modulation of sensory information from primary afferent to the spinal cord in rats.
Gu
Xing-Long
XL
Neurobiology Laboratory and National Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing 100871, PR China.
Yu
Long-Chuan
LC
D000344:Afferent Pathways / Q000033:anatomy & histology / Q000187:drug effects / Q000378:metabolism*; D000818:Animals; D015740:Calcitonin Gene-Related Peptide / Q000378:metabolism / Q000494:pharmacology; D005071:Evoked Potentials; D018690:Excitatory Amino Acid Agonists / Q000494:pharmacology; D005455:Fluorescent Antibody Technique; D018698:Glutamic Acid / Q000031:analogs & derivatives / Q000378:metabolism; D008297:Male; D009619:Nociceptors / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D010146:Pain / Q000378:metabolism / Q000503:physiopathology; D020671:Posterior Horn Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D018091:Receptors, AMPA / Q000187:drug effects / Q000378:metabolism*; D018015:Receptors, Calcitonin Gene-Related Peptide / Q000187:drug effects / Q000378:metabolism*; D012677:Sensation / Q000187:drug effects / Q000502:physiology; D013126:Spinal Nerve Roots / Q000187:drug effects / Q000378:metabolism*; D009435:Synaptic Transmission / Q000187:drug effects / Q000502:physiology*; D018350:alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid / Q000494:pharmacology
D018690:Excitatory Amino Acid Agonists; D018091:Receptors, AMPA; D018015:Receptors, Calcitonin Gene-Related Peptide; D018698:Glutamic Acid; D018350:alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid; D015740:Calcitonin Gene-Related Peptide