Abstract:
:Recent evidence demonstrated that lesion-induced central nervous system changes are at least partly mediated by the action of the gaseous transmitter nitric oxide (NO). We investigated the hypothesis that the frequency of peripheral C-fibre stimulation determines the number of neurones in the dorsal horn that can be visualised immunohistochemically with antibodies to NO synthase (NOS) or using the NADPH-dependent diaphorase (NDP) reaction. C-fibre stimulation of the sciatic nerve at a frequency of 0.01 Hz was followed by a significant increase in NDP-cell number in the spinal segment L3, whereas 0.1 and 1 Hz stimulation resulted in a significant decrease. Neuronal NOS (nNOS)-immunoreactivity was significantly influenced only by 1 Hz stimulation and only on the ipsilateral side in L3. Here, the number of nNOS-immunoreactive (ir) neurones decreased significantly in the superficial dorsal horn. The results show that the system of NDP-neurones is capable of displaying a bidirectional response depending on the frequency of C-fibre input.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Hoheisel U,Kaske A,Reinert A,Mense Sdoi
10.1016/s0304-3940(97)00334-0subject
Has Abstractpub_date
1997-05-23 00:00:00pages
181-4issue
3eissn
0304-3940issn
1872-7972pii
S0304-3940(97)00334-0journal_volume
227pub_type
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