Deficiency of the DSPP-cleaving enzymes meprin α and meprin β does not result in dentin malformation in mice

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• 作者：Philipp Arnold ; Lara Koopmann ; Florian Peters ; Falk Birkenfeld…
• 关键词：Dentin ; Meprinβ ; Dentinsialophosphoprotein (DSPP) ; Collagen I ; Dentinogenesis imperfecta
• 刊名：Cell and Tissue Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：367
• 期：2
• 页码：351-358
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Human Genetics; Proteomics; Molecular Medicine;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0878
• 卷排序：367

文摘

Formation of dentin requires the maturation of procollagen I and the proteolytic processing of the dentin sialophosphoprotein (DSPP). These cleavage events can be facilitated by the metalloproteinases meprin α and meprin β as well as by bone morphogenetic protein 1 (BMP-1). All three enzymes have been shown to play important roles during collagen I maturation in vivo and their potential in cleaving DSPP was demonstrated in vitro. Hence, it has been discussed whether meprin α, meprin β, BMP-1 or all three are crucial factors in the onset and progression of dentin-related diseases and this issue is addressed here. In this study, we compare the incisors and molars of meprin α (Mep1a-/-)- and meprin β (Mep1b-/-)-deficient mice with wild-type (WT) controls on the macroscopic and microscopic level. The dentin was evaluated towards the bone mineral density, dentin volume, calcification and collagen matrix integrity. Using immunohistochemistry, we could identify meprin β, BMP-1 and DSPP/DSP in the pre-dentin of WT mice. Nevertheless, no significant dentin malformation was observed in Mep1b-/- or Mep1a-/- deficient mice.