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KMID : 0385019980140020135
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Korean Journal of Laboratory Animal Science
1998 Volume.14 No. 2 p.135 ~ p.142
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Tyrosine Hydroxylase-Positive Neurons in the Olfactory Bulb of the Korean Wild Mouse(Mus musculus molossinus)
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이철호/Lee, Chul Ho
현병화/정영길/이남섭/Hyun, Byung Hwa/Jeong, Young Gil/Lee, Nam Seob
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Abstract
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This study was performed to investigate the neuroanatomical characteristics of the catecholaminergic cell groups in the olfactory bulb of wild mouse (Mus musculus molossinus). The distributions and morphological characteristics of neurons displaying immunoreactivity to the catecholamine synthetic enzymes, tyrosine hydroaylase (TH), dopamine-β-hydroxylase (DBH), and phenylethanolamine-N-methyltransferase (PNMT) were examined using the immunohistochemistry in the adjacent sections of the olfactory bulb of the wild Mouse (Mus musculus molossinus).
None of these cell groups displayed either DBH or PNMT immunoreactivity. However, many TH-immunoreactive neurons were located in the main olfactory bulb. Especially many TH-immunoreactive neurons were present in the glomerular layer as small periglomerular cells surrounding the glomeruli. Most of the TH-immunoreactive neurons of the glomerular layer were round and oval shape. Some TH-immunoreactive neurons were located in the external plegiform layer and, scattered in the mitral cell layer. No TH-immunoreactive neurons were found in the the accessory olfactory bulb. Many TH-immunoreactive nerve fibers were located in the external plexiform layer and internal plexiform layer. TH-immunoreactive nerve fibers of the external plexiform layer were project to the glomerular layer and mural cell layer. Many TH-immunoreactive fibers of the internal plexiform layer formed a neuronal tract.
According to the our study, all catecholaminergic neurons in the olfactory bulb of the wild mouse were dopaminergic.
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