Regional differences of serotonin-mediated synaptic plasticity in the chicken spinal cord with development and aging

Journal of Neural Transplantation & Plasticity
L ChenN Okado

Abstract

Previous studies in our laboratory [3,17] have demonstrated that serotonin (5-HT) appears to have a trophic-like effect in enhancing synapse formation and maintenance in both the developing and the adult central nervous system. In the present study, we focused on age-related changes in the density of the axosomatic and axodendritic synapses and the number of 5-HT-positive fibers in the chicken spinal cord, with special reference to differences between the ventral (laminae VII and IX) and the dorsal (lamina I) horn. At 1 week posthatching (P1W), a transient overproduction of synapses and 5-HT-immunoreactive fibers occurred in lamina IX; all parameters had returned to their initial levels by 1 month post-hatching (P1M). The density of synapses further decreased by about 40% between P6M and P2Y (2 years posthatching). Although the magnitude of the transient increase in lamina VII was less than that in lamina IX, the changing pattern of the synapses and the 5-HT-positive fibers was similar in both regions. In the ventral horn, thin 5-HT-positive fibers were most prominent at P1W and then decreased with development; thin 5-HT-positive fibers were still found at P6M but had almost disappeared by P2Y. By contrast, at P2Y the density o...Continue Reading

Citations

Dec 4, 1998·Biological Psychiatry·J A LiebermanJ E Kraus
Nov 30, 2004·Neuroscience Research·Toru MaeshimaNobuo Okado
Mar 8, 2005·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·Kaoru MiyazakiMasaaki Narita
Feb 6, 2014·Ageing Research Reviews·Ronald S PetraliaPamela J Yao
May 12, 2005·Developmental Neuroscience·A M Thompson, J M Lauder
Jan 22, 2005·Journal of Neurophysiology·Junichi KitagawaKoichi Iwata
Oct 24, 1998·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·A HayashiN Okado
May 20, 2020·Scientific Reports·Matthew J BroadheadGareth B Miles

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