Effect of dentine matrix proteins on human endometrial adult stem-like cells: In vitro regeneration of odontoblasts cells
Fahimeh S. Tabatabaei , Jafar Ai , Tahereh S. Jafarzadeh Kashi * , Mozaffar Khazaei , Abdol-Mohammad Kajbafzadeh , Zinat Ghanbari
* Tehran University of Medical Sciences, Faculty of Dentistry, Department of Dental Materials, Tehran, Iran
Objective: Human endometrium has enormous regenerative capacity due to the presence of endometrial stem cells. The present study sought to assess the possibility of differentiation of these cells into odontoblast-like cells by in vitro induction.
Methods: Endometrial stem-like cells were obtained using enzymatic digestion of the biopsy samples of the endometrium after hysterectomy and cultured in Dulbecco’s Modified Eagle’s Medium (DMEM) which contained dentine non-collagenous proteins (dNCPs). The results were evaluated using the following assays: analysis of morphology, enzymatic assay for measuring alkaline phosphatase activity, Alizarin Red staining to detect in vitro formation of mineralized nodules, immunofluorescence for detection of dentine sialoprotein (DSP) and dentine-matrix protein (DMP1), and Western blotting for DMP1 expression.
Results: Following induction, endometrial stem-like cells demonstrated high alkaline phosphatase activity, and expression of DSP and DMP1 confirmed the odontoblast phenotype. DMP1 level increased in samples treated with dNCPs.
Conclusions: Study results indicated that odontoblastic differentiation of endometrial stem cells can be induced by extracellular matrix proteins (e.g. dNCPs). The capacity of endometrial stem-like cells to differentiate into odontoblast-like cells under specific conditions gives new insights into the mechanism of odontogenesis and highlights the potential of such approaches for further research on dental tissue regeneration.
Keywords: Dentine non-collagenous proteins , Differentiation , Endometrial stem cells , Odontoblast
Archives of oral biology 58 (2013) 871-879