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. 2013 Feb 19;9(3):228–236. doi: 10.7150/ijbs.5476

Figure 4.

Figure 4

Disruption of β-catenin in odontoblasts and cementoblasts disrupts their differentiation in OC-Cre;Ctnnb1fl/flmice. ISH analyses show the expression of Col1a1 (A-D), OC (E-H), Dspp (I-L), and Bsp (M-P) on sections of molars and incisors from P15 Ctnnb1fl/fl and OC-Cre;Ctnnb1fl/flmice. (a-p) The images are higher-magnification views of the boxed areas in the top. In OC-Cre;Ctnnb1fl/fl sections, blue arrows indicate the dysplastic cells beneath the tooth crown and labial incisor that were absent of differential markers for an odontoblastic linage. Red asterisks show that cells lining the calcified tissues were positive for Col1a1, OC and Bsp expression but negative for Dspp expression. Black arrows in m-p demonstrate that cementoblasts labeled by Bsp signals were missing within the periodontium of OC-Cre;Ctnnb1fl/flteeth. DP, dental pulp; OD(c), crown odontoblast; OD(r), root odontoblast; OD(li), lingual odontoblast; PDL, periodontal ligament; AB, alveolar bone; Ce, cementoblast. Scale bar: 50μm (A-P, top), 20μm (a-p).