PMID- 31471398 OWN - NLM STAT- MEDLINE DCOM- 20200128 LR - 20200128 IS - 1791-7549 (Electronic) IS - 0258-851X (Print) IS - 0258-851X (Linking) VI - 33 IP - 5 DP - 2019 Sep-Oct TI - The Role of Fgf Signaling on Epithelial Cell Differentiation in Mouse Vagina. PG - 1499-1505 LID - 10.21873/invivo.11630 [doi] AB - BACKGROUND/AIM: The mouse vagina exhibits stratified squamous epithelium, which is comprised of multiple cell layers. We previously showed that erbB signaling, induced by epithelial estrogen receptor 1 (ESR1), is required for the initial differentiation of the epithelium. However, the downstream effector that mediates terminal differentiation in the apical layers remains elusive. The contribution of fibroblast growth factor (FGF) to vaginal epithelial cell differentiation was investigated. MATERIALS AND METHODS: Vaginas from wild-type or epithelium-specific Esr1 conditional knockout (cKO) mice were analyzed using immunohistochemistry and quantitative real-time RT-PCR. RESULTS: Of the FGF ligands examined, Fgf22 mRNA was significantly induced following estrogen treatment. Furthermore, FGF downstream signaling, phosphorylated FRS2 and ERK1/2 were exclusively expressed in the apical layers of the vaginal epithelium. No changes in such expression were observed in the Esr1 cKO mice. CONCLUSION: FGF-ERK/MAPK pathway may be a main inducer of terminal differentiation in the mouse vaginal epithelium. CI - Copyright(c) 2019, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. FAU - Hirano, Y U AU - Hirano YU AD - Department of Developmental Genetics, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Japan. FAU - Suzuki, Kentaro AU - Suzuki K AD - Department of Developmental Genetics, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Japan. FAU - Iguchi, Taisen AU - Iguchi T AD - Graduate School of Nanobioscience, Yokohama City University, Yokohama, Japan. FAU - Yamada, Gen AU - Yamada G AD - Department of Developmental Genetics, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Japan miyagawa@rs.tus.ac.jp genyama77@yahoo.co.jp. FAU - Miyagawa, Shinichi AU - Miyagawa S AD - Faculty of Industrial Science and Technology, Tokyo University of Science, Tokyo, Japan miyagawa@rs.tus.ac.jp genyama77@yahoo.co.jp. LA - eng PT - Journal Article PL - Greece TA - In Vivo JT - In vivo (Athens, Greece) JID - 8806809 RN - 0 (Biomarkers) RN - 0 (Ligands) RN - 62031-54-3 (Fibroblast Growth Factors) SB - IM MH - Animals MH - Biomarkers MH - *Cell Differentiation/genetics MH - Epithelial Cells/*cytology/*metabolism MH - Female MH - Fibroblast Growth Factors/*metabolism MH - Ligands MH - Mice MH - Mice, Transgenic MH - Mucous Membrane/*cytology/*metabolism MH - Signal Transduction MH - *Vagina PMC - PMC6755014 OTO - NOTNLM OT - Estrogen receptor OT - epithelium OT - fibroblast growth factors OT - keratinization OT - vagina COIS- None of the Authors has any potential conflicts of interest associated with this research. EDAT- 2019/09/01 06:00 MHDA- 2020/01/29 06:00 PMCR- 2019/09/03 CRDT- 2019/09/01 06:00 PHST- 2019/05/26 00:00 [received] PHST- 2019/06/30 00:00 [revised] PHST- 2019/07/03 00:00 [accepted] PHST- 2019/09/01 06:00 [entrez] PHST- 2019/09/01 06:00 [pubmed] PHST- 2020/01/29 06:00 [medline] PHST- 2019/09/03 00:00 [pmc-release] AID - 33/5/1499 [pii] AID - 10.21873/invivo.11630 [doi] PST - ppublish SO - In Vivo. 2019 Sep-Oct;33(5):1499-1505. doi: 10.21873/invivo.11630.