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Dentin matrix protein 1 induces cytodifferentiation of dental pulp stem cells into odontoblasts.
Gene Ther 2006; 13(7):611-20GT

Abstract

Odontoblasts are postmitotic cells that differentiate from the dental papilla. These cells are responsible for producing the calcified dentin matrix. The pulp-odontoblast interphase contains undifferentiated mesenchymal stem cells, which have the ability to cytodifferentiate into odontoblast-like cells in response to specific signaling molecules. Dentin matrix protein 1 (DMP1) is one of the dentin noncollagenous extracellular matrix proteins that has been implicated in regulation of mineralization. In this study, we have examined the potential role of DMP1 in inducing cytodifferentiation of dental pulp stem cells into odontoblast-like cells and formation of reparative dentin in a rat model. Cavities were drilled and pulps exposed in maxillary first molars. Collagen matrix impregnated with recombinant DMP1 was implanted directly in Group 1, while calcium hydroxide, a commonly used pulp-capping agent was implanted in group 2, collagen matrix that was not impregnated with rDMP1 was implanted directly in group 3, which served as control. Each of these three groups was subdivided into two subgroups, A for 2 weeks time duration and B for 4 weeks duration. At the end of the time period the maxillae were excised, tissues were processed for histological and immunohistochemical evaluations. The results showed that DMP1 could act as a morphogen on undifferentiated mesenchymal cells present in the dentin-pulp complex. These differentiated cells had the potential to regenerate dentin-like tissue, which was confirmed by the presence of collagenous matrix, odontoblast specific markers and calcified deposits.

Authors+Show Affiliations

Department of Oral Biology, University of Illinois at Chicago, Chicago, IL 60612, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

16319946

Citation

Almushayt, A, et al. "Dentin Matrix Protein 1 Induces Cytodifferentiation of Dental Pulp Stem Cells Into Odontoblasts." Gene Therapy, vol. 13, no. 7, 2006, pp. 611-20.
Almushayt A, Narayanan K, Zaki AE, et al. Dentin matrix protein 1 induces cytodifferentiation of dental pulp stem cells into odontoblasts. Gene Ther. 2006;13(7):611-20.
Almushayt, A., Narayanan, K., Zaki, A. E., & George, A. (2006). Dentin matrix protein 1 induces cytodifferentiation of dental pulp stem cells into odontoblasts. Gene Therapy, 13(7), pp. 611-20.
Almushayt A, et al. Dentin Matrix Protein 1 Induces Cytodifferentiation of Dental Pulp Stem Cells Into Odontoblasts. Gene Ther. 2006;13(7):611-20. PubMed PMID: 16319946.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dentin matrix protein 1 induces cytodifferentiation of dental pulp stem cells into odontoblasts. AU - Almushayt,A, AU - Narayanan,K, AU - Zaki,A E, AU - George,A, PY - 2005/12/2/pubmed PY - 2006/9/1/medline PY - 2005/12/2/entrez SP - 611 EP - 20 JF - Gene therapy JO - Gene Ther. VL - 13 IS - 7 N2 - Odontoblasts are postmitotic cells that differentiate from the dental papilla. These cells are responsible for producing the calcified dentin matrix. The pulp-odontoblast interphase contains undifferentiated mesenchymal stem cells, which have the ability to cytodifferentiate into odontoblast-like cells in response to specific signaling molecules. Dentin matrix protein 1 (DMP1) is one of the dentin noncollagenous extracellular matrix proteins that has been implicated in regulation of mineralization. In this study, we have examined the potential role of DMP1 in inducing cytodifferentiation of dental pulp stem cells into odontoblast-like cells and formation of reparative dentin in a rat model. Cavities were drilled and pulps exposed in maxillary first molars. Collagen matrix impregnated with recombinant DMP1 was implanted directly in Group 1, while calcium hydroxide, a commonly used pulp-capping agent was implanted in group 2, collagen matrix that was not impregnated with rDMP1 was implanted directly in group 3, which served as control. Each of these three groups was subdivided into two subgroups, A for 2 weeks time duration and B for 4 weeks duration. At the end of the time period the maxillae were excised, tissues were processed for histological and immunohistochemical evaluations. The results showed that DMP1 could act as a morphogen on undifferentiated mesenchymal cells present in the dentin-pulp complex. These differentiated cells had the potential to regenerate dentin-like tissue, which was confirmed by the presence of collagenous matrix, odontoblast specific markers and calcified deposits. SN - 0969-7128 UR - https://www.unboundmedicine.com/medline/citation/16319946/Dentin_matrix_protein_1_induces_cytodifferentiation_of_dental_pulp_stem_cells_into_odontoblasts_ L2 - http://dx.doi.org/10.1038/sj.gt.3302687 DB - PRIME DP - Unbound Medicine ER -