Limits...
Dental follicle stem cells in bone regeneration on titanium implants.

Lucaciu O, Soriţău O, Gheban D, Ciuca DR, Virtic O, Vulpoi A, Dirzu N, Câmpian R, Băciuţ G, Popa C, Simon S, Berce P, Băciuţ M, Crisan B - BMC Biotechnol. (2015)

Bottom Line: Differentiation into bone cells was induced in presence or absence of BMP-2 and TGFβ1.Additional BMP-2 in the medium did not allow DF stem cells to develop a more mature phenotype, leaving them in a pre-osteogenic stage.Long term culturing (70 days) on titanium surfaces of DF stem cells in standard medium without soluble osteogenic inducers, indicated that HA coating is more favorable, with the acquisition of a more mature osteoblastic phenotype as shown by immunocytochemical staining.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Rehabilitation, "Iuliu Haţieganu" University of Medicine and Pharmacy Cluj-Napoca, 15 Victor Babeș Street, 400012, Cluj-Napoca, Cluj, Romania. ondineluc@yahoo.com.

ABSTRACT

Background: We aimed to demonstrate that DF stem cells from impacted molars and canines can be used to improve bone regeneration on titanium implants surfaces. This study highlights the presence of stem cells in DF, their potential to adhere and differentiate into osteoblasts on different types of titanium surfaces.

Results: Isolated cells from the harvested DF tissue from impacted canine/molars, expressed stem cells markers. Differentiation into bone cells was induced in presence or absence of BMP-2 and TGFβ1. The presence of growth factors until 28 days in medium maintained the cells in an earlier stage of differentiation with a lower level of specific bone proteins and a higher expression of alkaline phosphatase (ALP). Influence of titanium implants with different bioactive coatings, hydroxyapatite (TiHA) and with silicatitanate (TiSiO2), and porous Ti6Al7Nb implants as control (TiCtrl), was studied in terms of cell adhesion and viability. Ti HA implants proved to be more favorable for adhesion and proliferation of DF stem cells in first days of cultivation. The influence of titanium coatings and osteogenic differentiation mediums with or without growth factors were evaluated. Additional BMP-2 in the medium did not allow DF stem cells to develop a more mature phenotype, leaving them in a pre-osteogenic stage. The best sustained mineralization process evaluated by immuno-cytochemical staining, scanning electron microscopy and Ca(2+) quantification was observed for TiHA implants with a higher expression of ALP, collagen and Ca(2+) deposition. Long term culturing (70 days) on titanium surfaces of DF stem cells in standard medium without soluble osteogenic inducers, indicated that HA coating is more favorable, with the acquisition of a more mature osteoblastic phenotype as shown by immunocytochemical staining. These findings demonstrated that even in absence of exogenous osteogenic factors, TiHA implants and in a lesser extent TiCtrl and TiSiO2 implants can induce and sustain osteogenic differentiation of DF stem cells, by their chemical and topographical properties.

Conclusions: Our research demonstrated that DF stem cells have a spontaneous tendency for osteogenic differentiation and can be used for improving bone regeneration on titanium implants surfaces.

Show MeSH

Related in: MedlinePlus

Morphological aspects of isolated cells from dental follicle in contrast-phase microscopy. (a) after 24 h rounded shape cells adhere to plastic surface; (b) migrated cells after 3 days from explants presented a fibroblast-like appearance; (c) morphologically homogeneous fibroblast-like cell population was observed at 2th passage; (d) cells maintained their high proliferation rate at passage 7th (magnification ×100)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
getmorefigures.php?uid=PMC4697321&req=5

Fig3: Morphological aspects of isolated cells from dental follicle in contrast-phase microscopy. (a) after 24 h rounded shape cells adhere to plastic surface; (b) migrated cells after 3 days from explants presented a fibroblast-like appearance; (c) morphologically homogeneous fibroblast-like cell population was observed at 2th passage; (d) cells maintained their high proliferation rate at passage 7th (magnification ×100)

Mentions: After initiation of cell adhesion in first 24 h, cell proliferation was intensive, and after achieving of subconfluence within 3 days, the first passage was made. Morphological aspect of the cells was a fibroblast type, spindle-like shape (Fig. 3c). These cells maintained a high proliferation rate even at advanced passages without modification of morphological aspect (Fig. 3d). Cells culture needed passages at 2–3 days.Fig. 3


Dental follicle stem cells in bone regeneration on titanium implants.

Lucaciu O, Soriţău O, Gheban D, Ciuca DR, Virtic O, Vulpoi A, Dirzu N, Câmpian R, Băciuţ G, Popa C, Simon S, Berce P, Băciuţ M, Crisan B - BMC Biotechnol. (2015)

Morphological aspects of isolated cells from dental follicle in contrast-phase microscopy. (a) after 24 h rounded shape cells adhere to plastic surface; (b) migrated cells after 3 days from explants presented a fibroblast-like appearance; (c) morphologically homogeneous fibroblast-like cell population was observed at 2th passage; (d) cells maintained their high proliferation rate at passage 7th (magnification ×100)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4697321&req=5

Fig3: Morphological aspects of isolated cells from dental follicle in contrast-phase microscopy. (a) after 24 h rounded shape cells adhere to plastic surface; (b) migrated cells after 3 days from explants presented a fibroblast-like appearance; (c) morphologically homogeneous fibroblast-like cell population was observed at 2th passage; (d) cells maintained their high proliferation rate at passage 7th (magnification ×100)
Mentions: After initiation of cell adhesion in first 24 h, cell proliferation was intensive, and after achieving of subconfluence within 3 days, the first passage was made. Morphological aspect of the cells was a fibroblast type, spindle-like shape (Fig. 3c). These cells maintained a high proliferation rate even at advanced passages without modification of morphological aspect (Fig. 3d). Cells culture needed passages at 2–3 days.Fig. 3

Bottom Line: Differentiation into bone cells was induced in presence or absence of BMP-2 and TGFβ1.Additional BMP-2 in the medium did not allow DF stem cells to develop a more mature phenotype, leaving them in a pre-osteogenic stage.Long term culturing (70 days) on titanium surfaces of DF stem cells in standard medium without soluble osteogenic inducers, indicated that HA coating is more favorable, with the acquisition of a more mature osteoblastic phenotype as shown by immunocytochemical staining.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Rehabilitation, "Iuliu Haţieganu" University of Medicine and Pharmacy Cluj-Napoca, 15 Victor Babeș Street, 400012, Cluj-Napoca, Cluj, Romania. ondineluc@yahoo.com.

ABSTRACT

Background: We aimed to demonstrate that DF stem cells from impacted molars and canines can be used to improve bone regeneration on titanium implants surfaces. This study highlights the presence of stem cells in DF, their potential to adhere and differentiate into osteoblasts on different types of titanium surfaces.

Results: Isolated cells from the harvested DF tissue from impacted canine/molars, expressed stem cells markers. Differentiation into bone cells was induced in presence or absence of BMP-2 and TGFβ1. The presence of growth factors until 28 days in medium maintained the cells in an earlier stage of differentiation with a lower level of specific bone proteins and a higher expression of alkaline phosphatase (ALP). Influence of titanium implants with different bioactive coatings, hydroxyapatite (TiHA) and with silicatitanate (TiSiO2), and porous Ti6Al7Nb implants as control (TiCtrl), was studied in terms of cell adhesion and viability. Ti HA implants proved to be more favorable for adhesion and proliferation of DF stem cells in first days of cultivation. The influence of titanium coatings and osteogenic differentiation mediums with or without growth factors were evaluated. Additional BMP-2 in the medium did not allow DF stem cells to develop a more mature phenotype, leaving them in a pre-osteogenic stage. The best sustained mineralization process evaluated by immuno-cytochemical staining, scanning electron microscopy and Ca(2+) quantification was observed for TiHA implants with a higher expression of ALP, collagen and Ca(2+) deposition. Long term culturing (70 days) on titanium surfaces of DF stem cells in standard medium without soluble osteogenic inducers, indicated that HA coating is more favorable, with the acquisition of a more mature osteoblastic phenotype as shown by immunocytochemical staining. These findings demonstrated that even in absence of exogenous osteogenic factors, TiHA implants and in a lesser extent TiCtrl and TiSiO2 implants can induce and sustain osteogenic differentiation of DF stem cells, by their chemical and topographical properties.

Conclusions: Our research demonstrated that DF stem cells have a spontaneous tendency for osteogenic differentiation and can be used for improving bone regeneration on titanium implants surfaces.

Show MeSH
Related in: MedlinePlus