| Literature DB >> 21511320 |
Maki Morishita1, Noriaki Ono, Kentano Miyai, Tomomi Nakagawa, Ryo Hanyu, Masashi Nagao, Paksinee Kamolratanakul, Takuya Notomi, Susan R Rittling, David T Denhardt, Henry M Kronenberg, Yoichi Ezura, Tadayoshi Hayata, Tetsuya Nakamoto, Masaki Noda.
Abstract
Parathyroid hormone/parathyroid hormone-related protein receptor (PPR) signaling is known to be involved in tooth development. In bone, extracellular matrix protein osteopontin (OPN) is a negative regulator of PPR signaling in bone formation. However, the role of OPN in modulation of PPR action in tooth development is not understood. Therefore, we examined the tooth in double mutant mice. Constitutively active PPR was expressed specifically in the odontoblasts and osteoblasts (caPPR-tg) in the presence or absence of OPN. Radiographic analysis indicated that the length of the third molar (M3) and the incisor was decreased in the caPPR-tg mice compared to wild type, and such reduction in molar and incisor length was further enhanced in the absence of OPN (caPPR-tg OPN-KO). With respect to histology of incisors, caPPR-tg induced high cellularity and irregularity in odontoblastic shape and this was enhanced by the absence of OPN. These morphological observations suggest that OPN modulates PPR signaling that are involved in tooth formation.Entities:
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Year: 2011 PMID： 21511320 PMCID： PMC3723684 DOI： 10.1016/j.tice.2011.02.003
Source DB: PubMed Journal: Tissue Cell ISSN： 0040-8166 Impact factor: 2.466