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- W2022123926 endingPage "302" @default.
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- W2022123926 abstract "The main olfactory bulb (MOB) is the first relay station of the olfactory system: it receives afferents from sensory neurons and sends efferents to the primary olfactory cortex. The MOB also receives many centrifugal afferents from various regions. Transection of peripheral afferents to the MOB has been reported to induce cell death in granule cells. However, little is known about the effect of transection of these central connections of the MOB in adult rats. Here, we used a unilateral olfactory peduncle transection model in the adult rat to examine neuronal degeneration in the MOB. In the MOB ipsilateral to the surgery, the granule cell layer (GCL) was smaller, and the number of mitral cells was decreased compared with the contralateral MOB at 7 days after surgery. Many degenerating cells were present in both the mitral cell layer (MCL) and GCL in the ipsilateral MOB at 3 days after surgery, although there were no obvious changes in the gross morphology. We also found terminal deoxynucleotidyl transferase (TdT)-mediated dUTP-digoxigenin nick end labeling (TUNEL)-positive cells in the MCL and GCL in the ipsilateral MOB at 3 days after surgery. The majority of the degenerating and TUNEL-positive cells were located in the deep, rather than the superficial, GCL. Immunohistochemistry for activated caspase-9 further supported the occurrence of apoptotic cell death in the mitral and deeply located granule cells. These results indicate that not only axotomized mitral cells, but also deeply located granule cells that were not directly injured, underwent apoptosis after transection of the central connections, and suggest that sensitivities to transection of the central connections differ among granule cells according to their depth in the GCL." @default.
- W2022123926 created "2016-06-24" @default.
- W2022123926 creator A5005488090 @default.
- W2022123926 creator A5011621192 @default.
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- W2022123926 date "2005-01-01" @default.
- W2022123926 modified "2023-10-16" @default.
- W2022123926 title "Deeply located granule cells and mitral cells undergo apoptosis after transection of the central connections of the main olfactory bulb in the adult rat" @default.
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- W2022123926 doi "https://doi.org/10.1016/j.neuroscience.2004.10.040" @default.
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