Improvement of bone repair with l-PRF and bovine bone in calvaria of rats. histometric and immunohistochemical study

Lago, Eliel Scarpioni do; Ferreira, Sueli Mara Soares Pinto; Garcia, Idelmo Rangel; Okamoto, Roberta; Mariano, Ronaldo Célio

doi:10.1007/s00784-019-03018-4

Cited by 22 publications

(37 citation statements)

References 37 publications

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“…Runx-2 is a transcription factor expressed mainly in pre-osteoblasts, as an osteoblastic differentiation indicator. 57 Our results indicate that these combined therapies, BG + EM and BB + ES, contributed to the initial process of osteoblast proliferation and maturation, since an increase in Runx-2 expression was observed at the beginning of the study period. 19,57 Opn is required for modulating bone cell adhesion, matrix mineralization, and osteoclastic function.…”

Section: Discussionsupporting

confidence: 50%

Electrical therapies act on the Ca²⁺/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

et al. 2021

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This study aimed to investigate the application of low-intensity electrostimulation (ES) and electromagnetic stimulation (EM) associated with bioactive glass (BG) or allogeneic grafts (BB) in bone regeneration. A cell viability test on osteoblasts (UMR-106) was performed in the presence of BB and BG grafts associated with ES (10 μA/5 min) and EM (500 Hz/2 min). Critical defects (25 mm 2 ) in calvaria were generated in male Wistar rats, and bone regeneration was evaluated on the 30th, 60th, and 120th days after surgery. Cell proliferation increased with the application of ES in both grafts and after EM with BG. Bone remodeling was more effective using the allogeneic graft in both therapies, with increased angiogenesis, osteoblast proliferation, and OPN expression in the BB + EM group. A higher number of osteoblasts and osteoclasts, and an increase in bone sialoprotein, Runx-2, and Opn gene expression were found in the BB + ES group. The BG graft associated with EM therapy had an increased proliferation of osteoblasts and increased expression of Runx-2 and Opn.Groups that had BG and ES therapy had increased numbers of osteoblasts, osteoclasts, and increased OPN expression. The expression of voltage-gated calcium channels increased in groups with ES, while calmodulin expression increased in therapies without grafting. ES and EM therapies favored the repair of bone defects upon grafting by improving angiogenesis, osteogenic gene expression, and tissue reorganization. Despite activating different pathways, both therapies increased the intracellular concentrations of calmodulin, leading to cell proliferation and bone regeneration.

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Section: Discussionsupporting

confidence: 50%

Electrical therapies act on the Ca²⁺/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

et al. 2021

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“…Motta Padilha et al found in a rat model that L-PRF reduced inflammatory response and enhanced bone neoformation [34]. Many studies showed that L-PRF mixed with scaffold improved bone repair [35][36][37]. In conclusion, there is a clear positive effect of APG on bone healing with enhanced bone tissue repair restricted to the cortical bone of critical size defects in rabbit tibia during our four week experiment, while it did not enhance bone tissue repair in the medullary space.…”

Section: Discussionsupporting

confidence: 47%

Role of Autologous Platelet Gel (APG) in Bone Healing: A Rabbit Study

et al. 2021

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Purpose: The aim of the present study is to evaluate the influence and efficacy of autologous platelets on bone regeneration in a rabbit defects model. Materials and Methods: A total of 12 critical size tibial defects were produced in six New Zealand rabbits: A total of six defects were filled with autologous platelet gel (APG) and six defects were maintained as untreated controls. No membranes were used to cover the bone osteotomies. The histology and histomorphometry were performed at four weeks on retrieved samples of both groups. Results: No complications were reported in any of the animals nor for the defects produced. A significantly higher lamellar and woven bone percentage was reported for the APG group with a lower level of marrow spaces (p < 0.05). Evidence of newly formed bone was found in the superficial portion of the bone defect of APG samples where no aspects of bone resorption were observed. Conclusions: The evidence of the present research revealed that APG increases new bone formation restricted to the cortical portion and induces more rapid healing in rabbit bone defects than in untreated defects.

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“…Since the primary macrophages of different individuals differed, we did not extract primary cells. Although many literatures have reported the use of i‐PRF to treat cells of heterogeneous origin (Dai et al, ; do Lago, Ferreira, Garcia Jr., Okamoto, & Mariano, ; Kargarpour et al, ; Liu et al, ), this is a limitation of current research. For example, without using primary cells, it may not be possible to accurately simulate the immune response in the body.…”

Section: Discussionmentioning

confidence: 88%

Anti‐inflammation effects of injectable platelet‐rich fibrin via macrophages and dendritic cells

Zhang

Yin

Zhao

et al. 2019

J Biomedical Materials Res

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Immune response to implantation materials plays a critical role during early local inflammation and biomaterial-induced regeneration or restoration. A novel platelet concentrate termed i-PRF (injectable platelet-rich fibrin) has recently been developed without any additives by low centrifugation speeds. To date, scientists have investigated the capability of releasing growth factors to improve regeneration but have ignored whether i-PRF can inhibit the inflammatory effect around the wound. The present study investigated the anti-inflammation effects of i-PRF on immune response-related cells, especially macrophages and dendric cells. We found that i-PRF reduced pro-inflammatory M1 phenotype of macrophages and activated dendritic cells around muscle defect that was injected with bacterial suspension. Moreover, in vitro experiments showed similar results. i-PRF deleted inflammatory response caused by lipopolysaccharide to some extent. We determined that TLR4, an activator of inflammatory stimulation and p-p65, a key factor belongs to classical inflammatory related NF-κB signal pathway, can be inhibited by use of i-PRF. Results indicate the potential anti-inflammatory role of i-PRF during regeneration and restoration.

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Improvement of bone repair with l-PRF and bovine bone in calvaria of rats. histometric and immunohistochemical study

Cited by 22 publications

References 37 publications

Electrical therapies act on the Ca²⁺/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

Electrical therapies act on the Ca²⁺/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

Role of Autologous Platelet Gel (APG) in Bone Healing: A Rabbit Study

Anti‐inflammation effects of injectable platelet‐rich fibrin via macrophages and dendritic cells

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Improvement of bone repair with l-PRF and bovine bone in calvaria of rats. histometric and immunohistochemical study

Cited by 22 publications

References 37 publications

Electrical therapies act on the Ca2+/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

Electrical therapies act on the Ca2+/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

Role of Autologous Platelet Gel (APG) in Bone Healing: A Rabbit Study

Anti‐inflammation effects of injectable platelet‐rich fibrin via macrophages and dendritic cells

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Electrical therapies act on the Ca²⁺/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts

Electrical therapies act on the Ca²⁺/CaM signaling pathway to enhance bone regeneration with bioactive glass [S53P4] and allogeneic grafts