Ultrastructural localisation of NADPH-d/nNOS expression in the superior cervical ganglion of the hamster

Chi Yu Tseng, June Horng Lue, Hung Ming Chang, Chen Yuan Wen, Jeng Yung Shieh

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3 引文 斯高帕斯(Scopus)


This study examined NADPH-d and nNOS expression in the SCG of hamsters. By light microscopy, numerous NADPH-d/NOS positive processes were widely distributed in the ganglion. Ultrastructurally, the NADPH-d reaction product was associated with the membranous organelles of neuronal soma, dendrites, myelinated fibres, small granular cells, and axon profiles bearing agranular vesicles. The NOS immunoreaction product, on the other hand, was localised in the cytoplasm of principal neurons and dendrites. Some of the NADPH-d/NOS labelled processes formed junctional contrasts including synapses or zonulae adherentia. Compared with the neurons, the nonneuronal cells in the ganglion, namely, macrophages, satellite cells and endothelial cells were labelled by NADPH-d but devoid of nNOS immunoreaction product. The results suggest that the NADPH-d/NOS positive fibres in the SCG originate not only from the projecting fibres of the lateral horns of thoracic spinal cord, but also from the principal neurons and small granular cells; some may represent visceral afferent fibres. Electron microscopic morphometry has shown that about 67% of the principal neurons contain NADPH-d reaction product, and that the majority were small to medium sized neurons based on cross-sectional areas in image analysis. On the basis of the present morphological study, it is concluded NO is produced by some local neurons and possibly some nonneuronal cells in the SCG as well as some fibres of extrinsic origin. In this connection, NO may serve either as a neurotransmitter or neuromodulator.
頁(從 - 到)461-475
期刊Journal of Anatomy
出版狀態已發佈 - 2000

ASJC Scopus subject areas

  • 生態學、進化論、行為學與系統學
  • 分子生物學
  • 解剖學
  • 細胞生物學
  • 組織學
  • 發展生物學


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