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Santos MAFM, Silva DN, Rovaris K, Sousa FB, Dantas ELA, Loureiro LA, Pereira TMC, Meyrelles SS, Bertollo RM, Vasquez EC. Optimal Parameters of Laser Therapy to Improve Critical Calvarial Defects. Front Physiol 2022; 13:841146. [PMID: 35283760 PMCID: PMC8914104 DOI: 10.3389/fphys.2022.841146] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Body bones play diverse pivotal roles, including the protection of vital organs. For instance, the integrative functions of the brain controlling diverse peripheral actions can be affected by a traumatic injury on the calvaria and the reparative process of a large defect is a challenge in the integrative physiology. Therefore, the development of biomaterials and approaches to improve such defects still requires substantial advances. In this regard, the most attractive approaches have been covering the cavity with inorganic bovine bone (IBB) and, more recently, also using low-level laser therapy (LT), but this issue has opened many questions. Here, it was determined the number of LT sessions required to speed up and to intensify the recovery process of two 5-mm-diameter defects promoted in the calvaria of each subgroup of six adult Wistar rats. The quantitative data showed that 30 days post-surgery, the recovery process by using blood clot-filling was not significantly influenced by the number of LT sessions. However, in the IBB-filled defects, the number of LT sessions markedly contributed to the improvement of the reparative process. Compared to the Control group (non-irradiated), the percentage of mineralization (formation of new bone into the cavities) gradually increased 25, 49, and 52% with, respectively, 4, 7, and 11 sessions of LT. In summary, combining the use of IBB with seven sessions of LT seems to be an optimal approach to greatly improve the recovery of calvarial defects. This translational research opens new avenues targeting better conditions of life for those suffering from large bone traumas and in the present field could contribute to preserve the integrative functions of the brain.
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Affiliation(s)
- Matheus AFM Santos
- Dentistry Graduate Program, Federal University of Espirito Santo, UFES, Vitoria, Brazil
| | - Daniela N. Silva
- Dentistry Graduate Program, Federal University of Espirito Santo, UFES, Vitoria, Brazil
| | - Karla Rovaris
- Department of Pathology & Clinical Dentistry, Federal University of Piaui, Teresina, Brazil
| | - Frederico B. Sousa
- Department of Morphology, Federal University of Paraiba, UFPB, Joao Pessoa, Brazil
| | | | - Lucas A. Loureiro
- Pharmaceutical Sciences Graduate Program, Vila Velha University, Vila Velha, Brazil
| | - Thiago M. C. Pereira
- Pharmaceutical Sciences Graduate Program, Vila Velha University, Vila Velha, Brazil
| | - Silvana S. Meyrelles
- Dentistry Graduate Program, Federal University of Espirito Santo, UFES, Vitoria, Brazil
| | - Rossiene M. Bertollo
- Dentistry Graduate Program, Federal University of Espirito Santo, UFES, Vitoria, Brazil
| | - Elisardo C. Vasquez
- Pharmaceutical Sciences Graduate Program, Vila Velha University, Vila Velha, Brazil
- *Correspondence: Elisardo C. Vasquez,
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Bioengineering the ameloblastoma tumour to study its effect on bone nodule formation. Sci Rep 2021; 11:24088. [PMID: 34916549 PMCID: PMC8677805 DOI: 10.1038/s41598-021-03484-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 12/03/2021] [Indexed: 01/09/2023] Open
Abstract
Ameloblastoma is a benign, epithelial cancer of the jawbone, which causes bone resorption and disfigurement to patients affected. The interaction of ameloblastoma with its tumour stroma drives invasion and progression. We used stiff collagen matrices to engineer active bone forming stroma, to probe the interaction of ameloblastoma with its native tumour bone microenvironment. This bone-stroma was assessed by nano-CT, transmission electron microscopy (TEM), Raman spectroscopy and gene analysis. Furthermore, we investigated gene correlation between bone forming 3D bone stroma and ameloblastoma introduced 3D bone stroma. Ameloblastoma cells increased expression of MMP-2 and -9 and RANK temporally in 3D compared to 2D. Our 3D biomimetic model formed bone nodules of an average surface area of 0.1 mm2 and average height of 92.37 [Formula: see text] 7.96 μm over 21 days. We demonstrate a woven bone phenotype with distinct mineral and matrix components and increased expression of bone formation genes in our engineered bone. Introducing ameloblastoma to the bone stroma, completely inhibited bone formation, in a spatially specific manner. Multivariate gene analysis showed that ameloblastoma cells downregulate bone formation genes such as RUNX2. Through the development of a comprehensive bone stroma, we show that an ameloblastoma tumour mass prevents osteoblasts from forming new bone nodules and severely restricted the growth of existing bone nodules. We have identified potential pathways for this inhibition. More critically, we present novel findings on the interaction of stromal osteoblasts with ameloblastoma.
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Hassanajili S, Karami-Pour A, Oryan A, Talaei-Khozani T. Preparation and characterization of PLA/PCL/HA composite scaffolds using indirect 3D printing for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 104:109960. [DOI: 10.1016/j.msec.2019.109960] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 06/27/2019] [Accepted: 07/05/2019] [Indexed: 12/15/2022]
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