徳島大学 教育・研究者情報データベース(EDB)

1. (英) Utami Trianna W / (日) トリアナ ワヒュ- ウタミ

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2. 三好 圭子([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.基礎歯学系.口腔生命科学])

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3. (英) Hagita Hiroko

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4. (英) Yanuaryska Ryna Dwi / (日) RYNA DWI YANUARYSKA / (読) りな どぅい やぬありすか

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5. 堀口 大吾([徳島大学.大学院医歯薬学研究部.歯学域.口腔科学部門.基礎歯学系.口腔生命科学])

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6. 野間 隆文

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(英) Possible Linkage of SP6 Transcriptional Activity with Amelogenesis by Protein Stabilization.

(英) Ameloblasts produce enamel matrix proteins such as amelogenin, ameloblastin, and amelotin during tooth development. The molecular mechanisms of ameloblast differentiation (amelogenesis) are currently not well understood. SP6 is a transcription factor of the Sp/KLF family that was recently found to regulate cell proliferation in a cell-type-specific manner. Sp6-deficient mice demonstrate characteristic tooth anomalies such as delayed eruption of the incisors and supernumerary teeth with disorganized amelogenesis. However, it remains unclear how Sp6 controls amelogenesis. In this study, we used SP6 high producer cells to identify SP6 target genes. Based on the observations that long-term culture of SP6 high producer cells reduced SP6 protein expression but not Sp6 mRNA expression, we found that SP6 is short lived and specifically degraded through a proteasome pathway. We established an in vitro inducible SP6 expression system coupled with siRNA knockdown and found a possible linkage between SP6 and amelogenesis through the regulation of amelotin and Rock1 gene expression by microarray analysis. Our findings suggest that the regulation of SP6 protein stability is one of the crucial steps in amelogenesis.

1. (英) Affiliation: Department of Molecular Biology, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan.

2. (英) PublicationType: Journal Article