Heparanase and its related molecules in odontogenic tumors

  • Nagatsuka Hitoshi
    Department of Oral pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
  • Naoki Katase
    Department of Oral pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
  • Pwint Han Phuu
    Department of Oral pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Orofacial Pain and Oral Medicine Center, Divisions of Diagnostic Sciences, School of Dentistry, University of South California
  • Tsujigiwa Hidetsugu
    Department of Virology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
  • Huat Siar Chong
    Department of Oral Pathology and Medicine, Faculty of Dentistry, University of Malaya
  • Nakajima Motowo
    New Business and Transfer, Johnson & Johnson K.K.
  • Naomoto Yoshio
    Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
  • Tamamura Ryo
    Department of Oral pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
  • Kawakami Toshiyuki
    Hard Tissue Pathology Unit, Matsumoto Dental University Graduate School of Oral Medicine
  • Mehmet Gunduz
    Department of Oral pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University

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Heparan sulphate proteoglycans (HSPGs) constitute a group of ubiquitous macromolecules of cell surface and extracellular matrices (ECM). HS chains of HSPGs can bind numerous molecules including growth factors, cytokines and chemokines. Thus the degradation of HS chains by endoglycosidases will affect profoundly cell function. Heparanase is a mammalian endo-β-glucuronidase enzyme capable of selectively degrading HS chains. Aside from the enzymatic functions, heparanase is preferentially expressed by human tumors, and its over-expression in tumor cells provides invasive phenotype. We previously reported that heparanase expression and the HS-bound molecules are important for odontogenesis and development of odontogenic tumors. It can be concluded that the growth and progression of benign and malignant odontogenic tumors are related to the deranged immunoexpression and localization of HS and heparanase molecules and that heparanase may be responsible for growth and progression of odontogenic tumors by modulating the availability and function of HS binding growth factors.

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