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Critical Reviews in Oral Biology & Medicine, Vol 11, 279-303, Copyright © 2000 by International & American Associations for Dental Research
ARTICLES |
J. Sodek, B. Ganss and M. D. McKee
MRC Group in Periodontal Physiology, Faculty of Dentistry, University of Toronto, ON, Canada. jaro.sodek@utoronto.ca
Osteopontin (OPN) is a highly phosphorylated sialoprotein that is a prominent component of the mineralized extracellular matrices of bones and teeth. OPN is characterized by the presence of a polyaspartic acid sequence and sites of Ser/Thr phosphorylation that mediate hydroxyapatite binding, and a highly conserved RGD motif that mediates cell attachment/signaling. Expression of OPN in a variety of tissues indicates a multiplicity of functions that involve one or more of these conserved motifs. While the lack of a clear phenotype in OPN "knockout" mice has not established a definitive role for OPN in any tissue, recent studies have provided some novel and intriguing insights into the versatility of this enigmatic protein in diverse biological events, including developmental processes, wound healing, immunological responses, tumorigenesis, bone resorption, and calcification. The ability of OPN to stimulate cell activity through multiple receptors linked to several interactive signaling pathways can account for much of the functional diversity. In this review, we discuss the structural features of OPN that relate to its function in the formation, remodeling, and maintenance of bones and teeth.
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Q.-T. Le, P. D. Sutphin, S. Raychaudhuri, S. C. T. Yu, D. J. Terris, H. S. Lin, B. Lum, H. A Pinto, A. C. Koong, and A. J. Giaccia Identification of Osteopontin as a Prognostic Plasma Marker for Head and Neck Squamous Cell Carcinomas Clin. Cancer Res., January 1, 2003; 9(1): 59 - 67. [Abstract] [Full Text] [PDF] |
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M. A. Chellaiah, N. Kizer, R. Biswas, U. Alvarez, J. Strauss-Schoenberger, L. Rifas, S. R. Rittling, D. T. Denhardt, and K. A. Hruska Osteopontin Deficiency Produces Osteoclast Dysfunction Due to Reduced CD44 Surface Expression Mol. Biol. Cell, January 1, 2003; 14(1): 173 - 189. [Abstract] [Full Text] |
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W. J. Grzesik and A.S. Narayanan CEMENTUM AND PERIODONTAL WOUND HEALING AND REGENERATION Crit. Rev. Oral. Biol. Med., November 1, 2002; 13(6): 474 - 484. [Abstract] [Full Text] [PDF] |
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W. J. Grzesik and A.S. Narayanan CEMENTUM AND PERIODONTAL WOUND HEALING AND REGENERATION Critical Reviews in Oral Biology & Medicine, November 1, 2002; 13(6): 474 - 484. [Abstract] [Full Text] [PDF] |
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Y. Shimazu, A. Nanci, and T. Aoba Immunodetection of Osteopontin at Sites of Resorption in the Pulp of Rat Molars J. Histochem. Cytochem., July 1, 2002; 50(7): 911 - 922. [Abstract] [Full Text] [PDF] |
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P. S. Rudland, A. Platt-Higgins, M. El-Tanani, S. de Silva Rudland, R. Barraclough, J. H. R. Winstanley, R. Howitt, and C. R. West Prognostic Significance of the Metastasis-associated Protein Osteopontin in Human Breast Cancer Cancer Res., June 1, 2002; 62(12): 3417 - 3427. [Abstract] [Full Text] [PDF] |
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C. C. Luedtke, M. D. McKee, D. G. Cyr, M. Gregory, M. T. Kaartinen, J. Mui, and L. Hermo Osteopontin Expression and Regulation in the Testis, Efferent Ducts, and Epididymis of Rats During Postnatal Development Through to Adulthood Biol Reprod, May 1, 2002; 66(5): 1437 - 1448. [Abstract] [Full Text] |
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D. Agrawal, T. Chen, R. Irby, J. Quackenbush, A. F. Chambers, M. Szabo, A. Cantor, D. Coppola, and T. J. Yeatman Osteopontin Identified as Lead Marker of Colon Cancer Progression, Using Pooled Sample Expression Profiling J Natl Cancer Inst, April 3, 2002; 94(7): 513 - 521. [Abstract] [Full Text] [PDF] |
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D. S. Perrien, E. C. Brown, J. Aronson, R. A. Skinner, D. C. Montague, T. M. Badger, and C. K. Lumpkin Jr. Immunohistochemical Study of Osteopontin Expression During Distraction Osteogenesis in the Rat J. Histochem. Cytochem., April 1, 2002; 50(4): 567 - 574. [Abstract] [Full Text] [PDF] |
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V. E. Arana-Chavez and A. Nanci High-resolution Immunocytochemistry of Noncollagenous Matrix Proteins in Rat Mandibles Processed with Microwave Irradiation J. Histochem. Cytochem., September 1, 2001; 49(9): 1099 - 1110. [Abstract] [Full Text] [PDF] |
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R. Agnihotri, H. C. Crawford, H. Haro, L. M. Matrisian, M. C. Havrda, and L. Liaw Osteopontin, a Novel Substrate for Matrix Metalloproteinase-3 (Stromelysin-1) and Matrix Metalloproteinase-7 (Matrilysin) J. Biol. Chem., July 20, 2001; 276(30): 28261 - 28267. [Abstract] [Full Text] [PDF] |
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