PMID- 9853116 OWN - NLM STAT- MEDLINE DCOM- 19990120 LR - 20190614 IS - 0006-8993 (Print) IS - 0006-8993 (Linking) VI - 809 IP - 2 DP - 1998 Nov 2 TI - Neuronal nicotinic acetylcholine receptors in rat trigeminal ganglia. PG - 238-45 AB - The application of nicotine to the various epithelia served by the trigeminal nerve produces irritation and/or pain by activating neuronal nicotinic acetylcholine receptors (NnAChRS) in sensory neurons. In this study the NnAChRs were identified in rat trigeminal ganglia (TG) using RT-PCR and immunocytochemistry. With RT-PCR the subunits of NnAChRs in rat TG were determined, and with immunocytochemistry the localization of three prominent subunits (alpha 7, alpha 4 and beta 2) were localized in intact TG neurons. The relative abundance of the alpha and beta subunits were: alpha 7 approximately alpha 3 > alpha 6 > alpha 4 approximately alpha 5 > alpha 9 > or = alpha 2, and beta 2 approximately beta 3 > beta 4. This is the first report of the alpha 9 subunit in TG. Immunohistochemical studies revealed that almost all TG neurons contained alpha 7-LI and alpha 4-LI, and that 85% had beta 2-LI. For these three subunits much of the label was internalized. Immunocytochemical studies using antibodies raised against chick alpha 8 subunits did not specifically label rat TG. These data reveal that rat TG neurons contain the entire spectrum of mammalian NnAChR subunits. FAU - Liu, L AU - Liu L AD - Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA. FAU - Chang, G Q AU - Chang GQ FAU - Jiao, Y Q AU - Jiao YQ FAU - Simon, S A AU - Simon SA LA - eng GR - DC 01065/DC/NIDCD NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Brain Res JT - Brain research JID - 0045503 RN - 0 (Chrna7 protein, rat) RN - 0 (DNA Probes) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Nicotinic) RN - 0 (alpha7 Nicotinic Acetylcholine Receptor) SB - IM MH - Animals MH - DNA Probes MH - Female MH - Gene Expression/physiology MH - Male MH - Neuritis/complications/*physiopathology MH - Neurons, Afferent/*chemistry MH - Pain/etiology/physiopathology MH - RNA, Messenger/analysis MH - Rats MH - Receptors, Nicotinic/*genetics MH - Reverse Transcriptase Polymerase Chain Reaction MH - Trigeminal Nuclei/*chemistry/*cytology MH - alpha7 Nicotinic Acetylcholine Receptor EDAT- 1998/12/16 00:00 MHDA- 1998/12/16 00:01 CRDT- 1998/12/16 00:00 PHST- 1998/12/16 00:00 [pubmed] PHST- 1998/12/16 00:01 [medline] PHST- 1998/12/16 00:00 [entrez] AID - S0006-8993(98)00862-2 [pii] AID - 10.1016/s0006-8993(98)00862-2 [doi] PST - ppublish SO - Brain Res. 1998 Nov 2;809(2):238-45. doi: 10.1016/s0006-8993(98)00862-2.