PMID- 30408082 OWN - NLM STAT- MEDLINE DCOM- 20190415 LR - 20190610 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 13 IP - 11 DP - 2018 TI - Characterization of sensory neuronal subtypes innervating mouse tongue. PG - e0207069 LID - 10.1371/journal.pone.0207069 [doi] LID - e0207069 AB - The tongue is uniquely exposed to water-soluble environmental chemicals that may lead to injury or tumorigenesis. However, comparatively little research has focused on the molecular and functional organization of trigeminal ganglia (TG) afferent neurons innervating the tongue. The current study identified and characterized lingual sensory neurons based on a neuronal subtype classification previously characterized in the dorsal root ganglion (DRG) neurons. We employed immunohistochemistry on transgenic reporter mouse lines as well as single-cell PCR of known markers of neuronal subtypes to characterize neuronal subtypes innervating the tongue. Markers expressed in retrogradely labeled TG neurons were evaluated for the proportion of neurons expressing each marker, intensity of expression, and overlapping genes. We found that tongue-innervating sensory neurons primarily expressed CGRP, TRPV1, TrkC, 5HT3A and Parvalbumin. These markers correspond to peptidergic and a subgroup of non-peptidergic C-nociceptors, peptidergic A nociceptors, proprioceptors and myelinated low-threshold mechanoreceptors (LTMRs). Interestingly, as reported previously, we also found several differences between TG and DRG neurons indicating the need for single-cell sequencing of neuronal types based on tissue type within all TG as well as DRG neurons. FAU - Wu, Ping AU - Wu P AUID- ORCID: 0000-0001-6372-9489 AD - Department of Endodontics, University of Texas Health at San Antonio, San Antonio, TX, United States of America. FAU - Arris, Dominic AU - Arris D AD - Department of Endodontics, University of Texas Health at San Antonio, San Antonio, TX, United States of America. FAU - Grayson, Max AU - Grayson M AD - Department of Endodontics, University of Texas Health at San Antonio, San Antonio, TX, United States of America. FAU - Hung, Chia-Nung AU - Hung CN AD - Department of Molecular Medicine, University of Texas Health at San Antonio, San Antonio, TX, United States of America. AD - Department of Life Science, Tunghai University, Taichung, Taiwan. FAU - Ruparel, Shivani AU - Ruparel S AD - Department of Endodontics, University of Texas Health at San Antonio, San Antonio, TX, United States of America. LA - eng GR - R01 DE027223/DE/NIDCR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20181108 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Biomarkers) SB - IM MH - Animals MH - Biomarkers/metabolism MH - Female MH - Gene Expression Regulation MH - Male MH - Mice MH - Sensory Receptor Cells/*cytology/metabolism MH - Tongue/*innervation PMC - PMC6224080 COIS- The authors have declared that no competing interests exist. EDAT- 2018/11/09 06:00 MHDA- 2019/04/16 06:00 PMCR- 2018/11/08 CRDT- 2018/11/09 06:00 PHST- 2018/08/06 00:00 [received] PHST- 2018/10/24 00:00 [accepted] PHST- 2018/11/09 06:00 [entrez] PHST- 2018/11/09 06:00 [pubmed] PHST- 2019/04/16 06:00 [medline] PHST- 2018/11/08 00:00 [pmc-release] AID - PONE-D-18-23177 [pii] AID - 10.1371/journal.pone.0207069 [doi] PST - epublish SO - PLoS One. 2018 Nov 8;13(11):e0207069. doi: 10.1371/journal.pone.0207069. eCollection 2018.