PMID- 12133594 OWN - NLM STAT- MEDLINE DCOM- 20021028 LR - 20190614 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 946 IP - 1 DP - 2002 Aug 9 TI - A comparative immunocytochemical study of development and regeneration of chemosensory neurons in the rat vomeronasal system. PG - 52-63 AB - Vomeronasal neurons undergo continuous neurogenesis during development and after neuronal injury. We used immunocytochemical methods to compare different stages of the vomeronasal organ development to those of regeneration following vomeronasal nerve transection. At E15 and at 6 to 10 days after injury, nestin-positive cells were observed throughout the sensory epithelium. We did not find nestin immunoreactivity to be localized to the boundary region of the epithelium. The early appearance and wide distribution of nestin-positive cells suggests that they represent chemosensory precursor cells that develop and migrate vertically in the epithelium. Vomeronasal receptor cells degenerated 6 to 8 days after nerve transection, but axon terminals in the accessory olfactory bulb (AOB) continued to show the presence of the chemosensory specific marker (OMP) for up to ten days, a significant finding observed in this study. It is likely that the distance from the site of nerve transection may contribute to differences in the time course of anterograde and retrograde axon degradation. OMP-positive neurons were observed in the normal adult epithelium and to a much lesser extent 10-60 days after recovery from nerve transection. Axons from regenerated receptor cells did not reach the AOB during this time period. This failure to reestablish connections with target cells in the AOB could explain why OMP-positive cells were rarely observed among the regenerated cells in the vomeronasal epithelium. FAU - Matsuoka, Masato AU - Matsuoka M AD - Division of Neurobiology and Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Niigata 951-8510, Japan. winner@med.niigata-u.ac.jp FAU - Osada, Toshiya AU - Osada T FAU - Yoshida-Matsuoka, Junko AU - Yoshida-Matsuoka J FAU - Ikai, Atsushi AU - Ikai A FAU - Ichikawa, Masumi AU - Ichikawa M FAU - Norita, Masao AU - Norita M FAU - Costanzo, Richard M AU - Costanzo RM LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Intermediate Filament Proteins) RN - 0 (Nerve Tissue Proteins) RN - 0 (Nes protein, rat) RN - 0 (Nestin) RN - 0 (Olfactory Marker Protein) RN - 0 (Omp protein, rat) SB - IM MH - Aging/physiology MH - Animals MH - Chemoreceptor Cells/*physiology MH - Denervation MH - Embryo, Mammalian/physiology MH - Embryonic and Fetal Development MH - Immunohistochemistry MH - Intermediate Filament Proteins/metabolism MH - Nerve Degeneration/metabolism/pathology MH - Nerve Endings/embryology/physiology MH - Nerve Regeneration/*physiology MH - Nerve Tissue Proteins/metabolism MH - Nestin MH - Olfactory Bulb/embryology/physiology MH - Olfactory Marker Protein MH - Rats MH - Rats, Sprague-Dawley MH - Time Factors MH - Vomeronasal Organ/*embryology/physiology EDAT- 2002/07/23 10:00 MHDA- 2002/10/29 04:00 CRDT- 2002/07/23 10:00 PHST- 2002/07/23 10:00 [pubmed] PHST- 2002/10/29 04:00 [medline] PHST- 2002/07/23 10:00 [entrez] AID - S0006899302028238 [pii] AID - 10.1016/s0006-8993(02)02823-8 [doi] PST - ppublish SO - Brain Res. 2002 Aug 9;946(1):52-63. doi: 10.1016/s0006-8993(02)02823-8.