PMID- 18412619 OWN - NLM STAT- MEDLINE DCOM- 20080701 LR - 20080416 IS - 1460-9568 (Electronic) IS - 0953-816X (Linking) VI - 27 IP - 8 DP - 2008 Apr TI - Changes in Fos expression in the accessory olfactory bulb of sexually experienced male rats after exposure to female urinary pheromones. PG - 1980-8 LID - 10.1111/j.1460-9568.2008.06169.x [doi] AB - We studied Fos-immunoreactive (Fos-ir) structures in the accessory olfactory bulb (AOB) of rats after the vomeronasal organ was exposed to urine. Exposure of the vomeronasal organ of male Wistar rats to oestrous and dioestrous female Wistar urine led to the appearance of many Fos-ir cells in the rostral region of the periglomerular cell (PGC) layer, but induced few Fos-ir cells in the caudal region. These results suggest that the regionalization of Fos-ir cells after exposure to female urine is remarkable in the PGC layer of the AOB. Sexually experienced male rats have been shown to prefer oestrous to dioestrous female urine, while sexually inexperienced males do not exhibit these preferences. In the present study, we compared the expression of Fos-ir cells in the AOB of sexually experienced and sexually inexperienced male rats following exposure to oestrous and dioestrous urine. In the localized region (lateral and rostral sectors) of the PGC layer, many more Fos-ir cells were expressed in the sexually experienced rats than in the inexperienced rats. These results suggest that sexual experience in males enhances the transmission of reproductively salient information concerning potential oestrous status to a specific PGC region of the AOB. FAU - Honda, Noriko AU - Honda N AD - Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan. FAU - Sakamoto, Harumi AU - Sakamoto H FAU - Inamura, Kouhei AU - Inamura K FAU - Kashiwayanagi, Makoto AU - Kashiwayanagi M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - France TA - Eur J Neurosci JT - The European journal of neuroscience JID - 8918110 RN - 0 (Proto-Oncogene Proteins c-fos) RN - 0 (Sex Attractants) SB - IM MH - Animals MH - Female MH - Gene Expression/*physiology MH - Immunohistochemistry MH - Male MH - Olfactory Bulb/*metabolism MH - Proto-Oncogene Proteins c-fos/*biosynthesis MH - Rats MH - Rats, Wistar MH - Sex Attractants/*metabolism MH - Sexual Behavior, Animal/*physiology MH - Urine/chemistry MH - Vomeronasal Organ EDAT- 2008/04/17 09:00 MHDA- 2008/07/02 09:00 CRDT- 2008/04/17 09:00 PHST- 2008/04/17 09:00 [pubmed] PHST- 2008/07/02 09:00 [medline] PHST- 2008/04/17 09:00 [entrez] AID - EJN6169 [pii] AID - 10.1111/j.1460-9568.2008.06169.x [doi] PST - ppublish SO - Eur J Neurosci. 2008 Apr;27(8):1980-8. doi: 10.1111/j.1460-9568.2008.06169.x.