Distribution of NO-Induced cGMP-Like Immunoreactive Neurones in the Abdominal Nervous System of the Crayfish, Procambarus clarkii(Neurobiology)
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概要
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Nitric oxide (NO) acts as a signalling molecule by activating soluble guanylate cyclase and causing accumulation of the second messenger cyclic guanosine 3',5'-monophosphate (cGMP) in target cells. In order to detect the presence of NO-cGMP signalling pathway in the crayfish abdominal nervous system, accumulation of NO-induced cGMP was investigated by anti-cGMP immunochemistry. Some preparations were incubated in a high-K^+ saline containing an inhibitor of cGMP-degrading phosphodiesterase, 3-isobutyl-1-methyxanthine (IBMX), to activate NO generating neurones, which could release NO in the ganglion, and then immunohistochemistry using an anti-cGMP antibody was performed. The other preparations were incubated in NO donor, sodium nitroprusside (SNP) saline containing IBMX before anti-cGMP immunohistochemistry was performed. The distribution of cGMP-like immunoreactive neurones in high-K^+ treated preparations was similar to that of cGMP-like immunoreactive neurones in NO donor treated preparations. About 70-80 cell bodies and many neuronal branches in the neuropilar area of the ganglion were stained, although no neurones showed immunoreactivity unless preparations were activated by either high-K^+ or the NO donor. Some of them were identical neurones, and they were intersegmental ascending interneurones and motor neurones. Sensory afferents that innervates hind gut showed strong cGMP-like immunoreactivity, although no mechanosensory afferents showed any immunoreactivity. These results strongly suggest the presence of an NO-cGMP signalling pathway that regulates neuronal events in the abdominal nervous system of the crayfish.
- 社団法人日本動物学会の論文
- 2002-09-25
著者
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Aonuma Hitoshi
Laboratory Of Neuro-cybernatics Research Institute For Electronic Science Hokkaido University
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Aonuma Hitoshi
Laboratory Of Neuro-cyoernetics Research Institute For Electronic Science Hokkaido University
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