Stem cells of the lamina propria of human oral mucosa and gingiva develop into mineralized tissues in vivo

Sandra Treves-Manusevitz, Lia Hoz, Heled Rachima, Gonzalo Montoya, Ephraim Tzur, Alexander Vardimon, A. Sampath Narayanan, Salomon Amar, Higinio Arzate, Sandu Pitaru

Research output: Contribution to journalArticlepeer-review

Abstract

Aim:s To characterize the mineralized tissue formed constitutively in the supracalvarial region of scid mice by a primitive stem cell population (hOMSC) derived from the lamina propria of the human oral mucosa and gingiva. Material and Methods Fibrin-hOMSC constructs were cultured for 14 days at which time point they were analysed for the expression of osteoblastic/cementoblastic markers and implanted between the skin and calvaria bones into scid mice. After 8 weeks, the animals were sacrificed and the implantation sites analysed. Results: Two-week-old cultures of fibrin-hOMSC constructs expressed osteogenic/cementogenic markers at the gene level. Macroscopic and radiographic examinations revealed mineralized masses at the implantation sites of fibrin-hOMSC constructs. Histology, histochemistry and immunofluorescence showed mineralized masses consisting of avascular cellular and acellular matrices that stained positively for collagen, Ca, cementum attachment protein, cementum protein 1, bone sialoprotein, alkaline phosphatase, osteocalcin, amelogenin and ameloblastin. Positive anti-human nuclear antigen indicated the human origin of the cells. Atomic force microscopy depicted long prismatic structures organized in lamellar aggregates. Conclusion:s Within the limitation of this study, the results indicate for the first time that fibrin-hOMSC constructs are endowed with the constitutive capacity to develop into mineralized tissues that exhibit certain similarities to cementum and bone.

Original languageEnglish
Pages (from-to)73-81
Number of pages9
JournalJournal of Clinical Periodontology
Volume40
Issue number1
DOIs
StatePublished - Jan 2013

Keywords

  • bone
  • cementum
  • gingiva
  • oral mucosa
  • regeneration
  • stem cells

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