Abstract
Glomerular epithelial protein-1 (Glepp1), a R3 subtype family of receptor-type protein tyrosine phosphatases, plays important role in the activation of Src family kinases and regulates cellular processes such as cell proliferation, differentiation, and apoptosis. In this study, we firstly examined the functional evaluation of Glepp1 in tooth development and morphogenesis. The precise expression level and developmental function of Glepp1 were examined by RT-qPCR, in situ hybridization, and loss and gain of functional study using a range of in vitro organ cultivation methods. Expression of Glepp1 was detected in the developing tooth germs in cap and bell stage of tooth development. Knocking down Glepp1 at E13 for 2 days showed the altered expression levels of tooth development-related signaling molecules, including Bmps, Dspp, Fgf4, Lef1, and Shh. Moreover, transient knock down of Glepp1 revealed alterations in cellular physiology, examined by the localization patterns of Ki67 and E-cadherin. Similarly, knocking down of Glepp1 showed disrupted enamel rod and interrod formation in 3-week renal transplanted teeth. In addition, due to attrition of odontoblastic layers, the expression signals of Dspp and the localization of NESTIN were almost not detected after knock down of Glepp1; however, their expressions were increased after Glepp1 overexpression. Thus, our results suggested that Glepp1 plays modulating roles during odontogenesis by regulating the expression levels of signaling molecules and cellular events to achieve the proper structural formation of hard tissue matrices in mice molar development.
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Funding
This work was supported by National Research Foundation of Korea (NRF) grant, funded by Korea government (NRF-2017R1A5A2015391, NRF-2018R1A2A3075600, NRF-2020R1A6A1A06046235, NRF-2022R1I1A2063745).
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Study concept and design; data acquisition, analysis, and interpretation; and drafting and critically revision of the manuscript: S.N., Y.P.A., S.J.C., and J.Y.K. Data interpretation, review, and editing: H.J.K., S.G.L., T.Y.K., E.P., J.Y.K., J.H.K., W.J.S., S.Y.A., C.H.A., J.K.J., J.H.H., H.Y., S.W.C., S.L., Y.L., K.K.P., B.K.M., C.P., and T.Y.K.
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Neupane, S., Aryal, Y.P., Kwak, HJ. et al. Developmental roles of glomerular epithelial protein-1 in mice molar morphogenesis. Cell Tissue Res 395, 53–62 (2024). https://doi.org/10.1007/s00441-023-03841-y
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DOI: https://doi.org/10.1007/s00441-023-03841-y