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de Oliveira BEG, Maia FLM, Massimino LC, Garcia CF, Plepis AMDG, Martins VDCA, Reis CHB, Silva VR, Bezerra AA, Pauris CC, Buchaim DV, Silva YBE, Buchaim RL, da Cunha MR. Use of Plant Extracts in Polymeric Scaffolds in the Regeneration of Mandibular Injuries. Pharmaceutics 2024; 16:491. [PMID: 38675152 PMCID: PMC11053713 DOI: 10.3390/pharmaceutics16040491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 03/25/2024] [Accepted: 03/31/2024] [Indexed: 04/28/2024] Open
Abstract
Severe loss of bone mass may require grafting, and, among the alternatives available, there are natural biomaterials that can act as scaffolds for the cell growth necessary for tissue regeneration. Collagen and elastin polymers are a good alternative due to their biomimetic properties of bone tissue, and their characteristics can be improved with the addition of polysaccharides such as chitosan and bioactive compounds such as jatoba resin and pomegranate extract due to their antigenic actions. The aim of this experimental protocol was to evaluate bone neoformation in experimentally made defects in the mandible of rats using polymeric scaffolds with plant extracts added. Thirty rats were divided into group 1, with a mandibular defect filled with a clot from the lesion and no graft implant (G1-C, n = 10); group 2, filled with collagen/chitosan/jatoba resin scaffolds (G2-CCJ, n = 10); and group 3, with collagen/nanohydroxyapatite/elastin/pomegranate extract scaffolds (G3-CHER, n = 10). Six weeks after surgery, the animals were euthanized and samples from the surgical areas were submitted to macroscopic, radiological, histological, and morphometric analysis of the mandibular lesion repair process. The results showed no inflammatory infiltrates in the surgical area, indicating good acceptance of the scaffolds in the microenvironment of the host area. In the control group (G1), there was a predominance of reactive connective tissue, while in the grafted groups (G2 and G3), there was bone formation from the margins of the lesion, but it was still insufficient for total bone repair of the defect within the experimental period standardized in this study. The histomorphometric analysis showed that the mean percentage of bone volume formed in the surgical area of groups G1, G2, and G3 was 17.17 ± 2.68, 27.45 ± 1.65, and 34.07 ± 0.64 (mean ± standard deviation), respectively. It can be concluded that these scaffolds with plant extracts added can be a viable alternative for bone repair, as they are easily manipulated, have a low production cost, and stimulate the formation of new bone by osteoconduction.
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Affiliation(s)
| | | | - Lívia Contini Massimino
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil; (L.C.M.); (A.M.d.G.P.); (M.R.d.C.)
| | - Claudio Fernandes Garcia
- São Carlos Institute of Chemistry, University of São Paulo, USP, São Carlos 13566-590, Brazil; (C.F.G.); (V.d.C.A.M.)
| | - Ana Maria de Guzzi Plepis
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil; (L.C.M.); (A.M.d.G.P.); (M.R.d.C.)
- São Carlos Institute of Chemistry, University of São Paulo, USP, São Carlos 13566-590, Brazil; (C.F.G.); (V.d.C.A.M.)
| | | | - Carlos Henrique Bertoni Reis
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marilia (UNIMAR), Marília 17525-902, Brazil; (C.H.B.R.); (D.V.B.)
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo (FOB/USP), Bauru 17012-901, Brazil
| | - Vinícius Rodrigues Silva
- Department of Human Anatomy, University of San Francisco (USF), Bragança Paulista 12916-900, Brazil;
| | - Andre Alves Bezerra
- Orthopedics and Traumatology Sector, Faculty of Medicine of Jundiaí, Jundiaí 13202-550, Brazil; (B.E.G.d.O.)
| | - Carolina Chen Pauris
- Postgraduate Program in Health Sciences, Faculty of Medicine of Jundiaí, Jundiaí 13202-550, Brazil; (C.C.P.); (Y.B.e.S.)
| | - Daniela Vieira Buchaim
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, University of Marilia (UNIMAR), Marília 17525-902, Brazil; (C.H.B.R.); (D.V.B.)
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São Paulo 05508-270, Brazil
- Medical School, University Center of Adamantina (UNIFAI), Adamantina 17800-000, Brazil
| | - Yggor Biloria e Silva
- Postgraduate Program in Health Sciences, Faculty of Medicine of Jundiaí, Jundiaí 13202-550, Brazil; (C.C.P.); (Y.B.e.S.)
| | - Rogerio Leone Buchaim
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo (FOB/USP), Bauru 17012-901, Brazil
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Science (FMVZ), University of São Paulo (USP), São Paulo 05508-270, Brazil
| | - Marcelo Rodrigues da Cunha
- Interunit Postgraduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil; (L.C.M.); (A.M.d.G.P.); (M.R.d.C.)
- Postgraduate Program in Health Sciences, Faculty of Medicine of Jundiaí, Jundiaí 13202-550, Brazil; (C.C.P.); (Y.B.e.S.)
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Massimino LC, da Conceição Amaro Martins V, Vulcani VAS, de Oliveira ÉL, Andreeta MB, Bonagamba TJ, Klingbeil MFG, Mathor MB, de Guzzi Plepis AM. Use of collagen and auricular cartilage in bioengineering: scaffolds for tissue regeneration. Cell Tissue Bank 2024; 25:111-122. [PMID: 32880089 DOI: 10.1007/s10561-020-09861-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 08/26/2020] [Indexed: 12/15/2022]
Abstract
The aim of this study was the development of collagen and collagen/auricular cartilage scaffolds for application in dermal regeneration. Collagen was obtained from bovine tendon by a 72 h-long treatment, while bovine auricular cartilage was treated for 24 h and divided into two parts, external (perichondrium, E) and internal (elastic cartilage, I). The scaffolds were prepared by mixing collagen (C) with the internal part (CI) or the external part (CE) in a 3:1 ratio. Differential scanning calorimetry, scanning electron microscopy (SEM) analysis, microcomputed tomography imaging (micro-CT) and swelling degree were used to characterize the scaffolds. Cytotoxicity, cell adhesion, and cell proliferation assays were performed using the cell line NIH/3T3. All samples presented a similar denaturation temperature (Td) around 48 °C, while CE presented a second Td at 51.2 °C. SEM micrographs showed superficial pores in all scaffolds and micro-CT exhibited interconnected pore spaces with porosity above 60% (sizes between 47 and 149 µm). The order of swelling was CE < CI < C and the scaffolds did not present cytotoxicity, showing attachment rates above 75%-all samples showed a similar pattern of proliferation until 168 h, whereas CI tended to decrease after this time. The scaffolds were easily obtained, biocompatible and had adequate morphology for cell growth. All samples showed high adhesion, whereas collagen-only and collagen/external part scaffolds presented a better cell proliferation rate and would be indicated for possible use in dermal regeneration.
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Affiliation(s)
- Lívia Contini Massimino
- Interunit Graduate Program in Bioengineering, University of São Paulo, São Carlos, SP, Brazil.
| | | | | | | | | | - Tito José Bonagamba
- São Carlos Institute of Physics, University of São Paulo, São Carlos, SP, Brazil
| | | | | | - Ana Maria de Guzzi Plepis
- Interunit Graduate Program in Bioengineering, University of São Paulo, São Carlos, SP, Brazil
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, Brazil
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3
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Da Cunha MR, Maia FLM, Iatecola A, Massimino LC, Plepis AMDG, Martins VDCA, Da Rocha DN, Mariano ED, Hirata MC, Ferreira JRM, Teixeira ML, Buchaim DV, Buchaim RL, De Oliveira BEG, Pelegrine AA. In Vivo Evaluation of Collagen and Chitosan Scaffold, Associated or Not with Stem Cells, in Bone Repair. J Funct Biomater 2023; 14:357. [PMID: 37504852 PMCID: PMC10381363 DOI: 10.3390/jfb14070357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/15/2023] [Accepted: 07/05/2023] [Indexed: 07/29/2023] Open
Abstract
Natural polymers are increasingly being used in tissue engineering due to their ability to mimic the extracellular matrix and to act as a scaffold for cell growth, as well as their possible combination with other osteogenic factors, such as mesenchymal stem cells (MSCs) derived from dental pulp, in an attempt to enhance bone regeneration during the healing of a bone defect. Therefore, the aim of this study was to analyze the repair of mandibular defects filled with a new collagen/chitosan scaffold, seeded or not with MSCs derived from dental pulp. Twenty-eight rats were submitted to surgery for creation of a defect in the right mandibular ramus and divided into the following groups: G1 (control group; mandibular defect with clot); G2 (defect filled with dental pulp mesenchymal stem cells-DPSCs); G3 (defect filled with collagen/chitosan scaffold); and G4 (collagen/chitosan scaffold seeded with DPSCs). The analysis of the scaffold microstructure showed a homogenous material with an adequate percentage of porosity. Macroscopic and radiological examination of the defect area after 6 weeks post-surgery revealed the absence of complete repair, as well as absence of signs of infection, which could indicate rejection of the implants. Histomorphometric analysis of the mandibular defect area showed that bone formation occurred in a centripetal fashion, starting from the borders and progressing towards the center of the defect in all groups. Lower bone formation was observed in G1 when compared to the other groups and G2 exhibited greater osteoregenerative capacity, followed by G4 and G3. In conclusion, the scaffold used showed osteoconductivity, no foreign body reaction, malleability and ease of manipulation, but did not obtain promising results for association with DPSCs.
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Affiliation(s)
- Marcelo Rodrigues Da Cunha
- Department of Morphology and Pathology, Jundiaí Medical School, Jundiaí 13202-550, Brazil
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of Sao Paulo (USP), São Carlos 13566-970, Brazil
- Department of Implant Dentistry, Faculdade São Leopoldo Mandic, Campinas 13045-755, Brazil
| | | | - Amilton Iatecola
- Department of Morphology and Pathology, Jundiaí Medical School, Jundiaí 13202-550, Brazil
| | - Lívia Contini Massimino
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of Sao Paulo (USP), São Carlos 13566-970, Brazil
| | - Ana Maria de Guzzi Plepis
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of Sao Paulo (USP), São Carlos 13566-970, Brazil
- Sao Carlos Institute of Chemistry, University of Sao Paulo (USP), São Carlos 13566-590, Brazil
| | | | | | | | | | | | | | - Daniela Vieira Buchaim
- Postgraduate Program in Structural and Functional Interactions in Rehabilitation, Postgraduate Department, University of Marilia (UNIMAR), Marília 17525-902, Brazil
- Medical School, University Center of Adamantina (UNIFAI), Adamantina 17800-000, Brazil
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ/USP), São Paulo 05508-270, Brazil
| | - Rogerio Leone Buchaim
- Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Science, University of São Paulo (FMVZ/USP), São Paulo 05508-270, Brazil
- Department of Biological Sciences, Bauru School of Dentistry (FOB/USP), University of São Paulo, Bauru 17012-901, Brazil
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Deniz Y, Işıktaş Acar E, Çetin Genç Ç. Effects of direct therapeutic radiation on pulpal surface of root dentin: an in vitro study. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2023; 62:261-268. [PMID: 36933029 DOI: 10.1007/s00411-023-01020-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 02/27/2023] [Indexed: 05/18/2023]
Abstract
The aims of the study were to analyze the effects of therapeutic radiation on human root dentin samples from the aspect of possible alterations in crystallinity, micro-morphology, and composition. Fifty-six root dentin specimens were divided into seven groups (0, 10, 20, 30, 40, 50, and 60 Gy). Scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analyses were performed on pulpal surfaces of root dentin after being irradiated by 6MV photon energy. Mineral compositions, Ca/P, P/N, Ca/N ratios, and hydroxyapatite pikes were calculated. Some deuteriations on the dentin surface were observed in SEM images after 30 Gy and subsequent doses. One-way ANOVA revealed that there was no significant alteration in weight percentages of C, O, Mg, Ca, P, and N between groups. Radiation did not influence stoichiometric Ca/P, Ca/N, and P/N molar ratios. XRD analysis did not show a remarkable decline in hydroxyapatite pikes by the increasing doses. Radiotherapy changes the micromorphology of circumpulpal dentin but does not affect elemental composition and crystallinity.
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Affiliation(s)
- Yeşim Deniz
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Sahil Yolu Street, No: 5, Çanakkale, 17100, Turkey.
| | - Ezgi Işıktaş Acar
- Department of Medical Physics, Trakya University, Edirne, 22030, Turkey
| | - Çiğdem Çetin Genç
- Department of Dentomaxillofacial Surgery, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Çanakkale, 17100, Turkey
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Yamanaka JS, Oliveira AC, Bastos AR, Fernandes EM, Reis RL, Correlo VM, Shimano AC. Collagen membrane from bovine pericardium for treatment of long bone defect. J Biomed Mater Res B Appl Biomater 2023; 111:261-270. [PMID: 36507698 DOI: 10.1002/jbm.b.35148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 06/20/2022] [Accepted: 08/01/2022] [Indexed: 12/15/2022]
Abstract
The treatment of bone regeneration failures has been constantly improved with the study of new biomaterials. Techgraft® is a collagen membrane derived from bovine pericardium, which has been shown to have biocompatibility and effectiveness in tissue repair. However, its use in orthopedics has not yet been evaluated. Therefore, the purpose of this study was to characterize a bovine pericardium collagen membrane and evaluate the effects of its use in the regeneration of a bone defect in rat tibia. Scanning electron microscopy, atomic force microscopy, weight lost and water uptake tests, and mechanical test were performed. Afterwards, the membrane was tested in an experimental study, using 12 male Sprague Dawley rats. A bone defect was surgically made in tibiae of animals, which were assigned to two groups (n = 6): bone defect treated with collagen membrane (TG) and bone defect without treatment (CONT). Then, tibiae were submitted to micro-CT. The membranes preserved their natural collagen characteristics, presenting great strength, high water absorption, hydrophilicity, and almost complete dissolution in 30 days. In the experimental study, the membrane enhanced the growth of bone tissue in contact with its surface. A higher bone volume and trabeculae number and less trabecular space was observed in bone defects of the membrane group compared to the control group at 21 days. In conclusion, the Techgraft membrane seems to have favorable characteristics for treatment of long bone repair.
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Affiliation(s)
- Jéssica S Yamanaka
- Departamento de Ortopedia e Anestesiologia. Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Ana Clara Oliveira
- Departamento de Ortopedia e Anestesiologia. Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - Ana Raquel Bastos
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco - Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga, Portugal
| | - Emanuel M Fernandes
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco - Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco - Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga, Portugal
| | - Vitor M Correlo
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco - Guimarães, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga, Portugal
| | - Antônio Carlos Shimano
- Departamento de Ortopedia e Anestesiologia. Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
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Milan EP, Martins VC, Horn MM, Plepis AM. Influence of blend ratio and mangosteen extract in chitosan/collagen gels and scaffolds: Rheological and release studies. Carbohydr Polym 2022; 292:119647. [DOI: 10.1016/j.carbpol.2022.119647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 11/02/2022]
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da Silva KTL, Grazziotin-Soares R, de Miranda RR, Novais VR, Carvalho EM, da Silva GR, Bauer J, Carvalho CN. Effect of an enamel matrix derivative (Emdogain) on the microhardness and chemical composition of human root dentin: an in vitro study. Sci Rep 2022; 12:8874. [PMID: 35614202 PMCID: PMC9133032 DOI: 10.1038/s41598-022-13081-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 05/11/2022] [Indexed: 11/24/2022] Open
Abstract
The advantage of using an Enamel matrix derivative EMD Emdogain as an intracanal medication could be a manner to strength the tooth structure, improving the physical and chemical properties of dentin. We tested, in vitro, the effect of Emdogain on the surface microhardness and chemical composition of root dentin. Ten human teeth were used to produce dentin specimens originated from the canal walls (n = 30) that remained in contact to Emdogain gel for 90 days. Baseline and 90-days after Emdogain treatment measurements were performed using Fourier Transform Infrared Spectroscopy (ATR/FTIR), Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS) and Knoop indenters. The use of EMD (Emdogain) for 90 days in contact with human root canal dentin specimens did not alter the microhardness and morphology of dentin. The elemental structure of dentin was altered because there was a reduction in carbonate content.
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Affiliation(s)
- Karime Tavares Lima da Silva
- Postgraduate Program of Dentistry, CEUMA University, São Luís, Maranhão, Brazil.,Department of Dentistry, Instituto Florence, São Luís, Maranhão, Brazil
| | | | - Rafael Resende de Miranda
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Veridiana Resende Novais
- Postgraduate Program of Dentistry, CEUMA University, São Luís, Maranhão, Brazil.,Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | | | - Gisele Rodrigues da Silva
- Postgraduate Program of Dentistry, CEUMA University, São Luís, Maranhão, Brazil.,Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Jose Bauer
- Dentistry Biomaterials Laboratory (Biomma), School of Dentistry, University Federal of Maranhão (UFMA), São Luis, MA, Brazil
| | - Ceci Nunes Carvalho
- Postgraduate Program of Dentistry, CEUMA University, São Luís, Maranhão, Brazil.
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Grandis RAD, Miotto LN, Genaro LE, Migliatti Polli L, Plepis AMDG, Rodrigues FT, Martins VDCA, Pereira Franchi L, Scarel-Caminaga RM, Sidorenko de Oliveira Capote T. In Vitro Evaluation of Acellular Collagen Matrices Derived from Porcine Pericardium: Influence of the Sterilization Method on Its Biological Properties. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6255. [PMID: 34771781 PMCID: PMC8584648 DOI: 10.3390/ma14216255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 08/29/2021] [Accepted: 09/02/2021] [Indexed: 01/31/2023]
Abstract
The aim of this study were characterize acellular collagen matrices derived from porcine pericardium (PP) and to evaluate their properties after sterilization by ethylene oxide and gamma ray. PP matrices were subjected to alkaline hydrolysis (AH), and samples were characterized for biological stability, membrane thickness measurements, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Subsequently, the matrices were frozen, lyophilized and sterilized by ethylene oxide or gamma radiation. For in vitro assays, CHO-K1 cell culture was used and evaluated for cytotoxicity, clonogenic survival assay, genotoxicity and mutagenicity. Analysis of variance (ANOVA) was used, followed by Dunnett's post-test, with a significance level of 5%. After AH, there was no significant change in matrix thickness. The relative biodegradability of the material after implantation was observed. Morphology and dimensions had small changes after AH. As for cell viability, none of the tested matrices showed a statistically significant difference (p > 0.05; Dunnett) regardless of the sterilization method. Furthermore, it was found that PP matrices did not interfere with the proliferation capacity of CHO-K1 cells (p > 0.05; Dunnett). As for genotoxicity, when sterilized with ethylene oxide (NP, P12 and P24), it showed genotoxic potential, but it was not genotoxic when sterilized by gamma radiation. No mutagenic effects were observed in either group. PP-derived collagen matrices hydrolyzed at different times were not cytotoxic. It is concluded that the best method of sterilization is through gamma radiation, since no significant changes were observed in the properties of the PP matrices.
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Affiliation(s)
- Rone Aparecido De Grandis
- Faculty of Pharmaceutical Sciences-FCFar, Paulista State University, Araraquara 14801-903, SP, Brazil; (R.A.D.G.); (L.M.P.)
| | - Larissa Natiele Miotto
- Department of Morphology, Genetics, Orthodontic and Pediatric Dentistry, Araraquara School of Dentistry, Paulista State University, Araraquara 14801-903, SP, Brazil; (L.N.M.); (L.E.G.); (R.M.S.-C.)
| | - Luis Eduardo Genaro
- Department of Morphology, Genetics, Orthodontic and Pediatric Dentistry, Araraquara School of Dentistry, Paulista State University, Araraquara 14801-903, SP, Brazil; (L.N.M.); (L.E.G.); (R.M.S.-C.)
| | - Larissa Migliatti Polli
- Faculty of Pharmaceutical Sciences-FCFar, Paulista State University, Araraquara 14801-903, SP, Brazil; (R.A.D.G.); (L.M.P.)
| | - Ana Maria de Guzzi Plepis
- Department of Chemistry and Molecular Physics, Institute of Chemistry of São Carlos, University of São Paulo, Sao Carlos 13566-590, SP, Brazil; (A.M.d.G.P.); (F.T.R.); (V.d.C.A.M.)
| | - Fabiana Tessari Rodrigues
- Department of Chemistry and Molecular Physics, Institute of Chemistry of São Carlos, University of São Paulo, Sao Carlos 13566-590, SP, Brazil; (A.M.d.G.P.); (F.T.R.); (V.d.C.A.M.)
| | - Virginia da Conceição Amaro Martins
- Department of Chemistry and Molecular Physics, Institute of Chemistry of São Carlos, University of São Paulo, Sao Carlos 13566-590, SP, Brazil; (A.M.d.G.P.); (F.T.R.); (V.d.C.A.M.)
| | - Leonardo Pereira Franchi
- Department of Genetics, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Sao Carlos 13566-590, SP, Brazil;
| | - Raquel Mantuaneli Scarel-Caminaga
- Department of Morphology, Genetics, Orthodontic and Pediatric Dentistry, Araraquara School of Dentistry, Paulista State University, Araraquara 14801-903, SP, Brazil; (L.N.M.); (L.E.G.); (R.M.S.-C.)
| | - Ticiana Sidorenko de Oliveira Capote
- Department of Morphology, Genetics, Orthodontic and Pediatric Dentistry, Araraquara School of Dentistry, Paulista State University, Araraquara 14801-903, SP, Brazil; (L.N.M.); (L.E.G.); (R.M.S.-C.)
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Garcia CF, Marangon CA, Massimino LC, Klingbeil MFG, Martins VCA, Plepis AMDG. Development of collagen/nanohydroxyapatite scaffolds containing plant extract intended for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 123:111955. [PMID: 33812583 DOI: 10.1016/j.msec.2021.111955] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/26/2021] [Accepted: 02/05/2021] [Indexed: 01/08/2023]
Abstract
In this study scaffolds of nanohydroxyapatite (nHA) and anionic collagen (C) combined with plant extracts intended for bone tissue repair were developed. Grape seed (P), pomegranate peel (R) and jabuticaba peel (J) extracts were used as collagen crosslinker agents in order to improve the materials properties. All crude extracts were effective against Staphylococcus aureus, but only for CR scaffold inhibition zone was noticed. The extracts acted as crosslinking agents, increasing enzymatic resistance and thermal stability of collagen. The extracts showed cytotoxicity at the concentrations tested, while nHA increased cell viability. The scaffolds presented porosity and pore size appropriate for bone growth. CR, CnHAP, CnHAR and CnHAJ increased the cell viability after 24 h. The combination of collagen, nHA and plant extracts offers a promising strategy to design novel biomaterials for bone tissue regeneration.
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Affiliation(s)
- Claudio Fernandes Garcia
- São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos 13560-970, Brazil.
| | - Crisiane Aparecida Marangon
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil
| | - Lívia Contini Massimino
- Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil
| | | | | | - Ana Maria de Guzzi Plepis
- São Carlos Institute of Chemistry (IQSC), University of São Paulo (USP), São Carlos 13560-970, Brazil; Interunits Graduate Program in Bioengineering (EESC/FMRP/IQSC), University of São Paulo (USP), São Carlos 13566-590, Brazil
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10
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Oliveira VDM, Assis CRD, Costa BDAM, Neri RCDA, Monte FTD, Freitas HMSDCV, França RCP, Santos JF, Bezerra RDS, Porto ALF. Physical, biochemical, densitometric and spectroscopic techniques for characterization collagen from alternative sources: A review based on the sustainable valorization of aquatic by-products. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129023] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Daza JHU, Righetto GM, Chaud MV, da Conceição Amaro Martins V, Lopes Baratella da Cunha Camargo I, Maria de Guzzi Plepis A. PVA/anionic collagen membranes as drug carriers of ciprofloxacin hydrochloride with sustained antibacterial activity and potential use in the treatment of ulcerative keratitis. J Biomater Appl 2020; 35:301-312. [PMID: 32571170 DOI: 10.1177/0885328220931733] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Devices such as contact lenses and collagen shields have been used to improve the antibiotic bioavailability of eye drops formulations in the treatment of ulcerative keratitis. Nevertheless, these devices are not sustained drug delivery systems, and a combination with eye drops is necessary. In animal patients, it requires constant supervision by trained personnel to avoid device loss, which increases the cost of treatment. In this study, PVA/anionic collagen membranes containing ciprofloxacin or tobramycin were prepared using two different methodologies, and the release, physical and antimicrobial properties were evaluated. The membrane containing ciprofloxacin was selected as a sustained drug delivery system with antibacterial activity against Staphylococcus aureus and Escherichia coli during 48 h. Despite to be opaque, due to its heterogeneous morphology, this membrane had the adequate mechanical strength, water content, hydrophilicity, water vapor permeability, and surface pH to interact with cornea without causing discomfort. In the surface of this membrane it was observed dispersed collagen fibrils which could serve as a substrate for corneal proteinases, contributing to the reduction in stromal damage and enhancing the epithelium regeneration. These results encourage the idea these membranes are new cost-effective and safe alternatives to treat corneal ulcers in animal patients.
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Affiliation(s)
- Jorge Humberto Unas Daza
- Laboratory of Biochemistry and Biomaterials, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Gabriela Marinho Righetto
- Laboratory of Epidemiology and Molecular Microbiology (LEMiMo), São Carlos Institute of Physics, University of São Paulo, São Carlos, Brazil
| | - Marco Vinicius Chaud
- Laboratory of Biomaterial and Nanotechnology, University of Sorocaba, Sorocaba, Brazil
| | | | | | - Ana Maria de Guzzi Plepis
- Laboratory of Biochemistry and Biomaterials, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
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12
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SCHMIDT MM, FONTOURA AMD, VIDAL AR, DORNELLES RCP, KUBOTA EH, MELLO RDO, CANSIAN RL, DEMIATE IM, OLIVEIRA CSD. Characterization of hydrolysates of collagen from mechanically separated chicken meat residue. FOOD SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1590/fst.14819] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Ferreira K, Cardoso L, Oliveira L, Franzo V, Pancotti A, Miguel M, Silva L, Vulcani V. Histological analysis of elastic cartilages treated with alkaline solution. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-11539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT The elastic cartilage is composed by chondroblasts and chondrocytes, extracellular matrix and surrounded by perichondrium. It has a low regeneration capacity and is a challenge in surgical repair. One of obstacles in engineering a structurally sound and long-lasting tissue is selecting the most appropriate scaffold material. One of the techniques for obtaining biomaterials from animal tissues is the decellularization that decreases antigenicity. In this work, alkaline solution was used in bovine ear elastic cartilages to evaluate the decellularization and the architecture of the extracellular matrix. The cartilages were treated in alkaline solution (pH13) for 72 hours and lyophilized to be compared with untreated cartilages by histological analysis (hematoxylin-eosin, Masson's trichrome and Verhoeff slides). Areas of interest for cell counting and elastic fiber quantification were delineated, and the distribution of collagen and elastic fibers and the presence of non-fibrous proteins were observed. The results demonstrated that the alkaline solution caused 90% decellularization in the middle and 13% in the peripheral region, and maintenance of the histological characteristics of the collagen and elastic fibers and non-fibrous protein removal. It was concluded that the alkaline solution was efficient in the decellularization and removal of non-fibrous proteins from the elastic cartilages of the bovine ear.
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Affiliation(s)
| | | | | | | | | | | | | | - V.A.S. Vulcani
- Universidade Federal de Goiás, Brazil; Universidade Federal de Jataí, Brazil
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14
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Vidal AR, Duarte LP, Schmidt MM, Cansian RL, Fernandes IA, de Oliveira Mello R, Demiate IM, Dornelles RCP. Extraction and characterization of collagen from sheep slaughter by-products. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 102:838-846. [PMID: 31835061 DOI: 10.1016/j.wasman.2019.12.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
There is a growing search for alternative raw materials to obtain collagen and hydrolysates and processes that do not threaten the environment or human health. Thus, sheep slaughter residue, which doesn't yet have an adequate and sustainable destination, is an excellent source of study. The objective of this study was to investigate the technological properties of collagen extracted from sheep slaughter by-products. It was possible to produce and characterize collagens extracted from sheep slaughter by-products. The yield of collagen was 18.0% and 12.5% for lamb and sheep by-products, respectively, on a dry basis. Lamb and sheep collagens showed similar FTIR and digestibility spectra and increased solubility at acidic pH-value. Higher foaming capacity was found for lamb collagen, while the sheep collagen presented higher viscosity. The emulsifying power of the collagens was 59.1 and 69.6 m2/g for lamb and sheep by-products, respectively. The collagens presented bands corresponding to α1, α2, and β chains, characteristic of collagen type I and a molecular weight (SDS-PAGE) between 100 and 5 kDa. The collagens of this study showed potential for application in food products, both for the technological improvement and nutrient enrichment, adding value and giving a sustainable destination to sheep slaughter by-products.
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Affiliation(s)
- Alessandra Roseline Vidal
- Federal University of Santa Maria (UFSM), Department of Science and Food Technology, Avenida Roraima, 1000, 97105-900, Camobi, Santa Maria, RS, Brazil.
| | - Letícia Pereira Duarte
- Federal University of Santa Maria (UFSM), Department of Science and Food Technology, Avenida Roraima, 1000, 97105-900, Camobi, Santa Maria, RS, Brazil
| | - Michele Mantelli Schmidt
- Federal University of Santa Maria (UFSM), Department of Science and Food Technology, Avenida Roraima, 1000, 97105-900, Camobi, Santa Maria, RS, Brazil
| | - Rogério Luis Cansian
- Integrated Regional University of Alto Uruguai and Missões (URI), Departament of Food Engineering, Avenida Sete de Setembro, 1621, 99709-298 Erechim, RS, Brazil
| | - Ilizandra Aparecida Fernandes
- Integrated Regional University of Alto Uruguai and Missões (URI), Departament of Food Engineering, Avenida Sete de Setembro, 1621, 99709-298 Erechim, RS, Brazil
| | - Renius de Oliveira Mello
- Federal University of Santa Maria (UFSM), Department of Science and Food Technology, Avenida Roraima, 1000, 97105-900, Camobi, Santa Maria, RS, Brazil
| | - Ivo Mottin Demiate
- State University of Ponta Grossa (UEPG), Department of Food Engineering, Avenida General Carlos Cavalcanti, 4748, 84030-000 Ponta Grossa, PR, Brazil
| | - Rosa Cristina Prestes Dornelles
- Federal University of Santa Maria (UFSM), Department of Science and Food Technology, Avenida Roraima, 1000, 97105-900, Camobi, Santa Maria, RS, Brazil
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15
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Campi LB, Lopes FC, Soares LES, de Queiroz AM, de Oliveira HF, Saquy PC, de Sousa-Neto MD. Effect of radiotherapy on the chemical composition of root dentin. Head Neck 2018; 41:162-169. [PMID: 30552849 DOI: 10.1002/hed.25493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/23/2018] [Accepted: 07/06/2018] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND The radiotherapy can directly affect the bond strength of the adhesive materials, interfering in the prognosis of restorative treatments, which may be caused by chemical changes in dentin structure. METHODS Twenty inferior homologues premolars were distributed in 2 groups (in vitro study) (n = 10): nonirradiated and irradiated. The specimens were submitted to the analysis of phosphate (ν1 PO4 3- ;ν2 PO4 3- ;ν4 PO4 3- ), carbonate (ν3 CO3 2- ), amide I, CH2 , amide III, and amide I/III ratio by confocal Raman spectroscopy. Data were submitted to statistical analysis (T test, P < .05). RESULTS In intracanal dentin, the irradiated group had lower ν4 PO4 3- values (1.23 ± 0.06) compared to nonirradiated group (1.40 ± 0.18) (P < .05), with no difference for ν1 PO4 3- and ν2 PO4 3 peaks (P > .05). The irradiated (1.56 ± 0.06) had lower carbonate, amide III (1.05 ± 0.19), and amide I/III ratio values (0.19 ± 0.06) compared to nonirradiated group (1.42 ± 0.10, 1.28 ± 0.24, and 0.31 ± 0.10, respectively) (P < .05). For medium dentin irradiated group (1.30 ± 0.12) had lower phosphate values compared to nonirradiated group (1.48 ± 0.22) (P < .05). In cementum, there was no statistical difference between the groups. CONCLUSION The radiotherapy was able to cause changes in ν4 PO4 3- , carbonate, and amide III peaks of root dentin.
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Affiliation(s)
- Lívia Bueno Campi
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Fabiane Carneiro Lopes
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Luís Eduardo Silva Soares
- Laboratory of Dentistry and Applied Materials (LDAM), Research and Development Institute (IP&D), Universidade do Vale do Paraíba, Univap, São José dos Campos, São Paulo, Brazil
| | - Alexandra Mussolino de Queiroz
- Department Children's Clinic, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Harley Francisco de Oliveira
- Medical Clinic Department, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Paulo César Saquy
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Manoel Damião de Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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16
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Klein‐Júnior CA, Reston E, Plepis AM, Martins VC, Pötter IC, Lundy F, Hentschke GS, Hentschke VS, Karim IE. Development and evaluation of calcium hydroxide‐coated, pericardium‐based biomembranes for direct pulp capping. ACTA ACUST UNITED AC 2018; 10:e12380. [DOI: 10.1111/jicd.12380] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/15/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Celso A. Klein‐Júnior
- Department of Operative DentistryLutheran University of Brazil, Cachoeira do Sul Brazil
| | - Eduardo Reston
- Department of Operative DentistryLutheran University of Brazil, Cachoeira do Sul Brazil
| | - Ana M. Plepis
- Department of BiomaterialsState University of São Paulo São Paulo Brazil
| | | | - Isabel C. Pötter
- Department of Operative DentistryLutheran University of Brazil, Cachoeira do Sul Brazil
| | - Fionnuala Lundy
- Centre for Experimental MedicineQueen’s University Belfast Belfast UK
| | | | - Vítor S. Hentschke
- Department of Operative DentistryLutheran University of Brazil, Cachoeira do Sul Brazil
| | - Ikhlas El Karim
- Centre for Experimental MedicineQueen’s University Belfast Belfast UK
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17
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Paiola FDG, Lopes FC, Mazzi-Chaves JF, Pereira RD, Oliveira HF, Queiroz AMD, Sousa-Neto MDD. How to improve root canal filling in teeth subjected to radiation therapy for cancer. Braz Oral Res 2018; 32:e121. [PMID: 30517430 DOI: 10.1590/1807-3107bor-2018.vol32.0121] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 10/11/2018] [Indexed: 12/21/2022] Open
Abstract
The aim of this study was to evaluate the influence of radiation therapy on root canal sealer push-out bond strength (BS) to dentin and the sealer/dentin interface after different final irrigation solutions (NaOCl, EDTA, and chitosan). Sixty-four maxillary canines were distributed into two groups (n=30): non-irradiated and irradiated with 60 Gy. Canals were prepared with Reciproc-R50 and subdivided (n=10) for final irrigation (NaOCl, EDTA, chitosan) and filled. Three dentin slices were obtained from each root third. The first slice of each third was selected for BS evaluation, and the failure mode was determined by stereomicroscopy. SEM analysis of the sealer-dentin interface was performed in the remaining slices. Two-way ANOVA and Tukey's tests (α=0.05) were used. Lower BS (P<0.0001) was obtained after irradiation (2.07±0.79 MPa), regardless of the final irrigation solution used. The NaOCl group (P<0.001) had the lowest BS in the irradiated (1.68±0.72) and non-irradiated (2.39±0.89) groups, whereas the EDTA (irradiated: 2.14±0.77 and non-irradiated: 3.92±1.54) and chitosan (irradiated: 2.37±0.73 and non-irradiated: 3.51±1.47) groups demonstrated a higher BS (P<0.05). The highest values were observed in the coronal third (3.17±1.38) when compared to the middle (2.74±1.36) and apical ones (2.09±0.97)(P<0.0001). There were more cohesive failures and more gaps in irradiated specimens, regardless of the final solution. The present study showed that radiation was associated with a decrease in BS, regardless of the final solution used, whereas chitosan increased BS in teeth subjected to radiation therapy.
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Affiliation(s)
- Fabiana de Góes Paiola
- Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Fabiane Carneiro Lopes
- Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Rodrigo Dantas Pereira
- Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Harley Francisco Oliveira
- Universidade de São Paulo - USP, Medical School of Ribeirão Preto, Department of Internal Medicine, Medical School of Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | - Alexandra Mussolino de Queiroz
- Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Pediatric Dentistry, Ribeirão Preto, SP, Brazil
| | - Manoel Damião de Sousa-Neto
- Universidade de São Paulo - USP, Dental School of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
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18
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Oliveira ACB, Morais TFL, Bernal C, Martins VCA, Plepis AMG, Menezes PFC, Perussi JR. Red light accelerates the formation of a human dermal equivalent. J Biomater Appl 2018; 32:1265-1275. [DOI: 10.1177/0885328218759385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Anna CB Oliveira
- Programa de Pós-Graduação Interunidades Bioengenharia - EESC/FMRP/IQSC, Universidade São Paulo-São Carlos-SP, Brazil
| | - Thayz FL Morais
- Programa de Pós-Graduação Interunidades Bioengenharia - EESC/FMRP/IQSC, Universidade São Paulo-São Carlos-SP, Brazil
| | - Claudia Bernal
- Instituto de Química de São Carlos, Universidade de São Paulo-São Carlos-SP, Brazil
| | - Virginia CA Martins
- Instituto de Química de São Carlos, Universidade de São Paulo-São Carlos-SP, Brazil
| | - Ana MG Plepis
- Programa de Pós-Graduação Interunidades Bioengenharia - EESC/FMRP/IQSC, Universidade São Paulo-São Carlos-SP, Brazil
- Instituto de Química de São Carlos, Universidade de São Paulo-São Carlos-SP, Brazil
| | - Priscila FC Menezes
- Instituto de Física de São Carlos, Universidade de São Paulo-São Carlos-SP, Brazil
| | - Janice R Perussi
- Programa de Pós-Graduação Interunidades Bioengenharia - EESC/FMRP/IQSC, Universidade São Paulo-São Carlos-SP, Brazil
- Instituto de Química de São Carlos, Universidade de São Paulo-São Carlos-SP, Brazil
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19
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Extraction and characterization of collagen from Antarctic and Sub-Antarctic squid and its potential application in hybrid scaffolds for tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:787-795. [DOI: 10.1016/j.msec.2017.04.122] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 04/07/2017] [Accepted: 04/09/2017] [Indexed: 01/19/2023]
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20
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Fu R, Yao K, Zhang Q, Jia D, Zhao J, Chi Y. Collagen Hydrolysates of Skin Shavings Prepared by Enzymatic Hydrolysis as a Natural Flocculant and Their Flocculating Property. Appl Biochem Biotechnol 2016; 182:55-66. [PMID: 27832513 DOI: 10.1007/s12010-016-2310-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 10/30/2016] [Indexed: 11/26/2022]
Abstract
A series of collagen hydrolysates (CHs) were prepared from pigskin shavings by using pepsin (PCH), trypsin (TCH), Alcalase (ACH), HCl (HCH), and NaOH (NCH). Their physicochemical properties, including degree of collagen hydrolysis, molecular weight distribution, electric charge, and microstructure, were investigated, and their flocculation performance was evaluated in a kaolin suspension, at varied pHs and concentrations. PCH exhibited high flocculation capability under acidic and neutral conditions, and its efficiency for removing suspended particles was approximately 80% at a concentration of 0.05 g/L. TCH, ACH, HCH, and NCH showed almost no flocculation capability. The flocculation capability of PCH could be mainly due to a combination of optimal molecular weight distribution and electric charge. This study could provide an environment-friendly natural flocculant and also proposes a promising approach for the reuse of collagen wastes. Graphical Abstract ᅟ.
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Affiliation(s)
- Ruijie Fu
- Department of Food Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Kai Yao
- Department of Food Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Qisheng Zhang
- Sichuan Academy of Food and Fermentation Industries, Chengdu, 611130, People's Republic of China
| | - Dongying Jia
- Department of Food Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Jiayuan Zhao
- Department of Food Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Yuanlong Chi
- Department of Food Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
- Chengdu Food and Drug Administration Research Institute, Chengdu, 610041, People's Republic of China.
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21
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Forti FL, Goissis G, Plepis AMG. Modifications on Collagen Structures Promoted by 1,4-Dioxane Improve Thermal and Biological Properties of Bovine Pericardium as a Biomaterial. J Biomater Appl 2016; 20:267-85. [PMID: 16364966 DOI: 10.1177/0885328206054048] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Collagen is a widely used raw material for biomaterial manufacture, which generally depends on chemical modifications of this fibrillar protein with cross-linking agents to improve biocompatibility and mechanical properties. However, cross-linking reduces the natural properties of collagen, such as low immune response, low toxicity as well as the ability to promote cellular growth and attachment. In this work, the modifications promoted by 1,4-dioxane solvent on the collagen present in native bovine pericardium (NBP) matrix routinely used in bioprosthesis manufacture, with or without subsequent cross-linking by glutaraldehyde, has been studied. The structural changes of NBP evaluated by scanning electron microscopy show that 1,4-dioxane induces a more homogeneous material by increasing aggregation of collagen fibers, while transmission scanning electron microscopy shows that natural collagen fibril arrangement, integrity, and the D-periodicity pattern are maintained by solvent treatments. Measurements of thermal stability and resistance to collagenase enzymatic digestion of NBP matrices treated with 1,4-dioxane show an increase in melting temperature and decrease in biodegradability, as compared to native pericardium. Cross-linking with glutaraldehyde improves all the analyzed NBP properties, which are not impaired by previous treatment with 1,4-dioxane. Histological evaluation of NBP submitted to 1,4-dioxane treatment shows lower lipid and cell contents and improvement in other morphologic characteristics compared to native pericardium. Altogether, these results suggest the use of 1,4-dioxane organic solvent as an alternative non-cross-linking treatment for direct utilization on rich collagen matrices, resulting in materials with improved biocompatibility and physicochemical properties suitable for tissue engineering.
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Affiliation(s)
- Fábio L Forti
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, CEP 05508-900, São Paulo-SP, Brasil.
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22
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Horn MM, Martins VC, Plepis AMDG. Influence of collagen addition on the thermal and morphological properties of chitosan/xanthan hydrogels. Int J Biol Macromol 2015; 80:225-30. [DOI: 10.1016/j.ijbiomac.2015.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/18/2015] [Accepted: 06/09/2015] [Indexed: 10/23/2022]
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23
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Chi YL, Zhang QX, Liao XP, Zhou J, Shi B. Physicochemical Properties and Surface Activities of Collagen Hydrolysate-Based Surfactants with Varied Oleoyl Group Grafting Degree. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5007068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuan-long Chi
- National
Engineering Laboratory for Clean Technology of Leather Manufacture and ‡Department of
Food Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Qi-xian Zhang
- National
Engineering Laboratory for Clean Technology of Leather Manufacture and ‡Department of
Food Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Xue-pin Liao
- National
Engineering Laboratory for Clean Technology of Leather Manufacture and ‡Department of
Food Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Jian Zhou
- National
Engineering Laboratory for Clean Technology of Leather Manufacture and ‡Department of
Food Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Bi Shi
- National
Engineering Laboratory for Clean Technology of Leather Manufacture and ‡Department of
Food Engineering, Sichuan University, Chengdu 610065, Sichuan, China
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Miguel FB, Barbosa Júnior ADA, de Paula FL, Barreto IC, Goissis G, Rosa FP. Regeneration of critical bone defects with anionic collagen matrix as scaffolds. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2567-2575. [PMID: 23784007 DOI: 10.1007/s10856-013-4980-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 06/10/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to make a histomorphometric evaluation of the osteogenic potential of anionic collagen matrix as scaffolds; either crosslinked in glutaraldehyde or not cross-linked and, implanted in critical bone defects in rat calvaria. Seventy-two rats were randomly distributed in three groups: anionic collagen scaffolds treated for 24 h of selective hydrolysis (ACSH); anionic collagen scaffolds treated for 24 h of selective hydrolysis and 5 min of crosslinking in glutaraldehyde 0.05% (ACSHGA); empty bone defect (Control), evaluated at the biological points of 15, 45, 90 and 120 days. The results showed that the biomaterials implanted were biocompatible and showed a high osteogenic potential. These biomaterials presented a speed of biodegradation compatible with bone neoformation, which was shown to be associated with angiogenesis inside the scaffolds at all biological points. The percentage of mineralization of ACSH (87%) differed statistically from that found in ACSHGA (66%). It was concluded that the regeneration of critical bone defect was more evident in anionic collagen without crosslinking (ACSH).
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Affiliation(s)
- Fúlvio Borges Miguel
- Gonçalo Moniz Research Center, Oswaldo Cruz Foundation, Salvador, Bahia, Brazil,
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25
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Forti FL, Bet MR, Goissis G, Plepis AMG. 1,4-Dioxane enhances properties and biocompatibility of polyanionic collagen for tissue engineering applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1901-1912. [PMID: 21643966 DOI: 10.1007/s10856-011-4358-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 05/23/2011] [Indexed: 05/30/2023]
Abstract
Polyanionic collagen obtained from bovine pericardial tissue submitted to alkaline hydrolysis is an acellular matrix with strong potential in tissue engineering. However, increasing the carboxyl content reduces fibril formation and thermal stability compared to the native tissues. In the present work, we propose a chemical protocol based on the association of alkaline hydrolysis with 1,4-dioxane treatment to either attenuate or revert the drastic structural modifications promoted by alkaline treatments. For the characterization of the polyanionic membranes treated with 1,4-dioxane, we found that (1) scanning electron microscopy (SEM) shows a stronger reorientation and aggregation of collagen microfibrils; (2) histological evaluation reveals recovering of the alignment of collagen fibers and reassociation with elastic fibers; (3) differential scanning calorimetry (DSC) shows an increase in thermal stability; and (4) in biocompatibility assays there is a normal attachment, morphology and proliferation associated with high survival of the mouse fibroblast cell line NIH3T3 in reconstituted membranes, which behave as native membranes. Our conclusions reinforce the ability of 1,4-dioxane to enhance the properties of negatively charged polyanionic collagen associated with its potential use as biomaterials for grafting, cationic drug- or cell-delivery systems and for the coating of cardiovascular devices.
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Affiliation(s)
- Fabio L Forti
- Departamento de Bioquimica, Instituto de Quimica, Universidade de Sao Paulo, Sao Paulo, SP, CEP 05508-900, Brazil.
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Caldas HC, Fernandes IMM, Kawasaki-Oyama RS, Baptista MASF, Plepis AMG, Martins VA, Coimbra TM, Goloni-Bertollo EM, Braile DM, Abbud-Filho M. Effect of stem cells seeded onto biomaterial on the progression of experimental chronic kidney disease. Exp Biol Med (Maywood) 2011; 236:746-54. [PMID: 21606119 DOI: 10.1258/ebm.2011.011024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Different routes for the administration of bone marrow-derived cells (BMDC) have been proposed to treat the progression of chronic renal failure (CRF). We investigated whether (1) the use of bovine pericardium (BP) as a scaffold for cell therapy would retard the progression of CRF and (2) the efficacy of cell therapy differently impacts distinct degrees of CRF. We used 2/3 and 5/6 models of renal mass reduction to simulate different stages of chronicity. Treatments consisted of BP seeded with either mesenchymal or mononuclear cells implanted in the parenchyma of remnant kidney. Renal function and proteinuria were measured at days 45 and 90 after cell implantation. BMDC treatment reduced glomerulosclerosis, interstitial fibrosis and lymphocytic infiltration. Immunohistochemistry showed decreased macrophage accumulation, proliferative activity and the expression of fibronectin and α-smooth muscle-actin. Our results demonstrate: (1) biomaterial combined with BMDC did retard the progression of experimental CRF; (2) cellular therapy stabilized serum creatinine (sCr), improved creatinine clearance and 1/sCr slope when administered during the less severe stages of CRF; (3) treatment with combined therapy decreased glomerulosclerosis, fibrosis and the expression of fibrogenic molecules; and (4) biomaterials seeded with BMDC can be an alternative route of cellular therapy.
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Affiliation(s)
- Heloisa C Caldas
- Department of Medicine, Laboratory of Immunology and Experimental Transplantation, Medical School of Sao Jose do Rio Preto, Av. Brigadeiro Faria Lima 5416, Sao Jose do Rio Preto, Brazil
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Goissis G, de Fátima Giglioti A, Braile DM. Preparation and Characterization of an Acellular Bovine Pericardium Intended for Manufacture of Valve Bioprostheses. Artif Organs 2011; 35:484-9. [DOI: 10.1111/j.1525-1594.2011.01264.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sripriya R, Kumar R, Balaji S, Senthil Kumar M, Sehgal P. Characterizations of polyanionic collagen prepared by linking additional carboxylic groups. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2010.11.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rodrigues FT, Martins VCA, Plepis AMG. Porcine skin as a source of biodegradable matrices: alkaline treatment and glutaraldehyde crosslinking. POLIMEROS 2010. [DOI: 10.1590/s0104-14282010005000013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ehrlich H, Hanke T, Simon P, Born R, Fischer C, Frolov A, Langrock T, Hoffmann R, Schwarzenbolz U, Henle T, Bazhenov VV, Worch H. Carboxymethylation of the fibrillar collagen with respect to formation of hydroxyapatite. J Biomed Mater Res B Appl Biomater 2010; 92:542-51. [PMID: 19957363 DOI: 10.1002/jbm.b.31551] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Control over crystal growth by acidic matrix macromolecules is an important process in the formation of many mineralized tissues. Highly acidic macromolecules are postulated intermediates in tissue mineralization, because they sequester many calcium ions and occur in high concentrations at mineralizing foci in distantly related organisms. A prerequisite for biomineralization is the ability of cations like calcium to bind to proteins and to result in concert with appropriate anions like phosphates or carbonates in composite materials with bone-like properties. For this mineralization process the proteins have to be modified with respect to acidification. In this study we modified the protein collagen by carboxymethylation using glucuronic acid. Our experiments showed unambigously, that N(epsilon)-carboxymethyllysine is the major product of the in vitro nonenzymatic glycation reaction between glucuronic acid and collagen. We hypothesized that the function of biomimetically carboxymethylated collagen is to increase the local concentration of corresponding ions so that a critical nucleus of ions can be formed, leading to the formation of the mineral. Thus, the self-organization of HAP nanocrystals on and within collagen fibrils was intensified by carboxymethylation.
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Affiliation(s)
- Hermann Ehrlich
- Institute of Bioanalytical Chemistry, TU Dresden, Dresden, 01069 Germany.
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31
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Horn MM, Martins VCA, de Guzzi Plepis AM. Interaction of anionic collagen with chitosan: Effect on thermal and morphological characteristics. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.12.039] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rocha LB, Adam RL, Leite NJ, Metze K, Rossi MA. Shannon's entropy and fractal dimension provide an objective account of bone tissue organization during calvarial bone regeneration. Microsc Res Tech 2008; 71:619-25. [DOI: 10.1002/jemt.20598] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cunha MR, Santos AR, Goissis G, Genari SC. Implants of polyanionic collagen matrix in bone defects of ovariectomized rats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:1341-8. [PMID: 17914639 DOI: 10.1007/s10856-006-0105-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Accepted: 12/04/2006] [Indexed: 05/17/2023]
Abstract
In recent years, there has been a great interest in the development of biomaterials that could be used in the repair of bone defects. Collagen matrix (CM) has the advantage that it can be modified chemically to improve its mechanical properties. The aim of the present study was to evaluate the effect of three-dimensional membranes of native or anionic (submitted to alkaline treatment for 48 or 96 h) collagen matrix on the consolidation of osteoporosis bone fractures resulting from the gonadal hormone alterations caused by ovariectomy in rats subjected to hormone replacement therapy. The animals received the implants 4 months after ovariectomy and were sacrificed 8 weeks after implantation of the membranes into 4-mm wide bone defects created in the distal third of the femur with a surgical bur. Macroscopic analysis revealed the absence of pathological alterations in the implanted areas, suggesting that the material was biocompatible. Microscopic analysis showed a lower amount of bone ingrowth in the areas receiving the native membrane compared to the bone defects filled with the anionic membranes. In ovariectomized animals receiving anionic membranes, a delay in bone regeneration was observed mainly in animals not subjected to hormone replacement therapy. We conclude that anionic membranes treated with alkaline solution for 48 and 96 h presented better results in terms of bone ingrowth.
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Affiliation(s)
- Marcelo Rodrigues Cunha
- Department of Cell Biology, Institute of Biology, State University of Campinas, P.O. Box 6109, Campinas, SP 13084-971, Brazil.
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de Paula M, Goissis G, Martins VCA. Rheological behavior of anionic collagen injectable gels in the presence of rhamsan for plastic surgery applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2007; 18:1683-90. [PMID: 17483883 DOI: 10.1007/s10856-007-3058-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2005] [Accepted: 05/31/2006] [Indexed: 05/15/2023]
Abstract
The present paper describes the rheological properties of anionic collagen gels and anionic collagen:rhamsan composites gels in the concentration of 0.7, 4 and 6%, estimated to be used as injectable biomaterials for plastic reconstruction. Rheological studies of these gels showed that independently of pH, composition and concentration the viscoelastic behavior was dependent on the frequency, with the storage modulus always greater than the loss modulus (G' > G'' and delta < 45 degrees ). Creep experiments showed that anionic collagen:rhamsan composites equilibrated at pH 7.4 were less elastic and more susceptible to deformation in comparison to gels equilibrated at pH 3.5. Flow experiments indicated that the force needed for the extrusion of anionic collagen:rhamsan composites, in comparison to anionic collagen, was significantly smaller and with a smoother flow, suggesting the association with rhamsan may be a good alternative in the replacement of glutaraldehyde to stabilize the microfibril assembly of commercial collagen gel preparations. Finally, on the basis of dynamic viscosity profiles found for different preparations, some of these composites are potential candidates to be utilized in laryngology.
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Affiliation(s)
- Márcio de Paula
- Laboratório de Bioquímica/Biomateriais. Departamento de Química e Física Molecular do Instituto de Química de São Carlos, Universidade de São Paulo, Av do Trabalhador Sãocarlense, 400 São Carlos, Sao Paulo, SP, Brazil.
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Wang Y, Kim HJ, Vunjak-Novakovic G, Kaplan DL. Stem cell-based tissue engineering with silk biomaterials. Biomaterials 2006; 27:6064-82. [PMID: 16890988 DOI: 10.1016/j.biomaterials.2006.07.008] [Citation(s) in RCA: 605] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2006] [Accepted: 07/06/2006] [Indexed: 12/27/2022]
Abstract
Silks are naturally occurring polymers that have been used clinically as sutures for centuries. When naturally extruded from insects or worms, silk is composed of a filament core protein, termed fibroin, and a glue-like coating consisting of sericin proteins. In recent years, silk fibroin has been increasingly studied for new biomedical applications due to the biocompatibility, slow degradability and remarkable mechanical properties of the material. In addition, the ability to now control molecular structure and morphology through versatile processability and surface modification options have expanded the utility for this protein in a range of biomaterial and tissue-engineering applications. Silk fibroin in various formats (films, fibers, nets, meshes, membranes, yarns, and sponges) has been shown to support stem cell adhesion, proliferation, and differentiation in vitro and promote tissue repair in vivo. In particular, stem cell-based tissue engineering using 3D silk fibroin scaffolds has expanded the use of silk-based biomaterials as promising scaffolds for engineering a range of skeletal tissues like bone, ligament, and cartilage, as well as connective tissues like skin. To date fibroin from Bombyx mori silkworm has been the dominant source for silk-based biomaterials studied. However, silk fibroins from spiders and those formed via genetic engineering or the modification of native silk fibroin sequence chemistries are beginning to provide new options to further expand the utility of silk fibroin-based materials for medical applications.
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Affiliation(s)
- Yongzhong Wang
- Department of Chemical and Biological Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
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Rocha LB, Adam RL, Leite NJ, Metze K, Rossi MA. Biomineralization of polyanionic collagen–elastin matrices during cavarial bone repair. J Biomed Mater Res A 2006; 79:237-45. [PMID: 16817211 DOI: 10.1002/jbm.a.30782] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The polyanionic collagen-elastin matrices (PCEMs) are osteoconductive scaffolds that present high biocompatibility and efficacy in the regeneration of bone defects. In this study, the objective was to determine if these matrices are directly mineralized during the osteogenesis process and their influence in the organization of the new bone extracellular matrix. Samples of three PCEMs, differing in their charge density, were implanted into critical-sized calvarial bone defects created in rats and evaluated from 3 days up to 1 year after implantation. The implanted PCEMs were directly biomineralized by osteoblasts as shown by ultrastructural, histoenzymologic, and morphologic analysis. The removal of the implants occurred during the bone remodeling process. The organization of the new bone matrix was evaluated by image texture analysis determining the Shannon's entropy and the fractal dimension of digital images. The bone matrix complexity decreased as the osteogenesis progressed approaching the values obtained for the original bone structure. These results show that the PCEMs allow faster formation of new bone by direct biomineralization of its structure and skipping the biomaterial resorption phase.
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Affiliation(s)
- Lenaldo B Rocha
- Department of Pathology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Av. Bandeirantes, 3900, 14049-900 Ribeirão Preto, SP, Brazil.
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Miguel FB, Cardoso AKMV, Barbosa AA, Marcantonio E, Goissis G, Rosa FP. Morphological assessment of the behavior of three-dimensional anionic collagen matrices in bone regeneration in rats. J Biomed Mater Res B Appl Biomater 2006; 78:334-9. [PMID: 16470816 DOI: 10.1002/jbm.b.30492] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The osteogenic behavior of three-dimensional collagenic and anionic matrices (M3DGA) implanted in critical bone defects of 8 mm diameter was morphologically assessed. The defects were performed in the calvaria of 48 adult male (Wistar) rats, and observed at days 15, 30, and 60. The animals were distributed in four groups of equal number: GA1 (M3DGA with 60 min of cross-linking in glutaraldehyde [GA]); GA2 (M3DGA with 30 min of cross-linking in GA); GA3 (M3DGA with 15 min of cross-linking in GA); and G4 (control group, without any implanted biomaterial). The M3DGAs were biocompatible, with mild and regressive chronic granulomatous inflammation, associated with the degradation of their fibers. Furthermore, tissue neovascularization and neomineralization was noted, with statistically significant differences in these amounts among the groups (GA1, GA2, and GA3) and G4. In G4 neoformation was limited to the edges of the defect as well as interstitial fibrosis. Under the experimental conditions and for the parameters analyzed, the M3DGAs had osteogenic behavior, which was more evident in M3DGA 15 min.
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Affiliation(s)
- Fúlvio B Miguel
- Dentistry Faculty, Federal University of Bahia, Salvador, BA, Brazil
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38
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Figueiró SD, Macêdo AAM, Melo MRS, Freitas ALP, Moreira RA, de Oliveira RS, Góes JC, Sombra ASB. On the dielectric behaviour of collagen–algal sulfated polysaccharide blends: Effect of glutaraldehyde crosslinking. Biophys Chem 2006; 120:154-9. [PMID: 16337076 DOI: 10.1016/j.bpc.2005.11.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2005] [Revised: 11/01/2005] [Accepted: 11/02/2005] [Indexed: 10/25/2022]
Abstract
In this paper, impedance measurements in the frequency range from 10(-2) to 10(6) Hz are presented for collagen and algal sulfated polysaccharide crosslinked films. We are considering the development of new biomaterials which have potential applications in coating of cardiovascular prostheses, support for cellular growth and in systems for controlled drug delivery. The effect of crosslink sulfated polysaccharide on the physical chemical properties of collagen was studied using FT-infrared spectroscopy, differential scanning calorimetry (DSC), dielectric spectroscopy. The resulting films crosslinked with glutaraldehyde (GA) in concentrations of 0.001% and 0.05% when analysed by DSC, showed that the GA treatment not only left the thermal stability of the collagen unaffected, but it also decreased the thermal transition energy. Dielectric spectroscopy shows that the effect of the crosslink on the blend film was associated to the decrease and stabilization of the dielectric permittivity at low frequencies and decreased its conductivity.
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Affiliation(s)
- S D Figueiró
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
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Rocha LB, Brochi MAC, Bellucci AD, Rossi MA. Efficacy of polyanionic collagen matrices for bone defect healing. J Biomed Mater Res B Appl Biomater 2005; 71:355-9. [PMID: 15386493 DOI: 10.1002/jbm.b.30102] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Polyanionic collagen-elastin matrices (PCEMs) possess attractive properties, such as extra negative charges, piezoelectricity, and extra RGD sites, which could make them effective in the treatment of bone defects. Although they are biocompatible with the osteogenesis process, it is unknown if PCEMs could aid in the recovery of bone defects in challenging situations. To evaluate this hypothesis, three PCEMs, differing in their negative charge density, were implanted in rat calvarial defects. Specimens harvested at 3, 7, 15, 30, and 60 days after implantation were evaluated radiographically and histologically. Two matrices were able to sustain the osteogenesis process and quickly recover the lost bone structure. The third, and most electronegative, left matrix remnants amidst the areas of new bone. The control showed bone formation limited to the boundaries of the defect. These results suggest that some PCEMs might become a useful resource in the treatment of bone defects.
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Affiliation(s)
- Lenaldo B Rocha
- Department of Pathology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, 14049-900, Brazil.
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de Paula M, Goissis G, Martins VCA, da Silva Trindade JC. Injectable gels of anionic collagen: Rhamsan composites for plastic correction: Preparation, characterization, and rheological properties. J Biomed Mater Res B Appl Biomater 2005; 75:393-9. [PMID: 16037966 DOI: 10.1002/jbm.b.30326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The present article describes the preparation and characterization of anionic collagen gels obtained from porcine intestinal submucosa after 72 h of alkaline treatment and in the form of rhamsan composites to develop injectable biomaterials for plastic reconstruction. All materials were characterized by SDS/polyacrylamide gel electrophoresis, infrared spectroscopy, thermal stability, potentiometric titration, rheological properties, and fluidity tests. Biocompatibility was appraised after the injection of anionic collagen: rhamsan composites at 2.5% in 60 North Folk rabbits. Independently of processing, the collagen's secondary structure was preserved in all cases, and after 72 h of hydrolysis the collagen was characterized by a carboxyl group content of 346+/-9, which, at physiological pH, corresponds to an increase of 106+/-17 negative charges, in comparison to native collagen, due to the selective hydrolysis of asparagine and glutamine carboxyamide side chain. Rheological studies of composites at pH 7.4 in concentrations of 2, 4, and 6% (in proportions of 75:1 and 50:1) showed a viscoelastic behavior dependent on the frequency, which is independent of concentration and proportion. In both, the concentration of the storage modulus always predominated over the loss modulus (G'>G'' and delta<45 degrees ). The results from creep experiments confirmed this behavior and showed that anionic collagen:rhamsan composites at pH 7.4 in the proportion of 50:1 are less elastic and more susceptible to deformation in comparison to gels in the proportion of 75:1, independent of concentration. This was further confirmed by flow experiments, indicating that the necessary force for the extrusion of anionic collagen:rhamsan composites, in comparison to anionic collagen, was significantly smaller and with a smooth flow. Biocompatibility studies showed that the tissue reaction of anionic collagen:rhamsan composites at 2.5% in the proportion of 75:1 was compatible with the application of these gels in plastic reconstruction. These results suggest that the association of collagen with rhamsan may be a good alternative in the replacement of glutaraldehyde to stabilize the microfibril assembly of commercial collagen gel preparations.
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Affiliation(s)
- Márcio de Paula
- Departamento de Química e Física Molecular do Instituto de Química de São Carlos, Universidade de São Paulo (IQSC/USP).
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Goissis G, da Silva Maginador SV, da Conceição Amaro Martins V. Biomimetic mineralization of charged collagen matrices: in vitro and in vivo study. Artif Organs 2003; 27:437-43. [PMID: 12752204 DOI: 10.1046/j.1525-1594.2003.07252.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Polyanionic collagen matrix prepared by hydrolysis side chain amides of asparagine and glutamine was mineralized in vivo, without inflammatory response, biodegradation, or resorption, with calcium phosphate deposited in close resemblance to the D-periodicity of collagen fibrils assembly. In vitro results with the same material produced mineralized collagen fibers with a similar morphology and chemical characteristics, suggesting that amide hydrolysis may have introduced into this matrix, signs for the controlled mineralization of collagen fiber. TEM indicated that amide hydrolysis occurred near the OVERLAP and GAP zones, as suggested by the significant reduction in inter-band distances in these regions. The lack of an inflammatory response associated to the similar mineralization pattern observed in vivo and in vitro suggests not only the biomimetic behavior of polyanionic collagen matrix, but also its potential uses as scaffold for bone tissue reconstruction. Based on these results, a model for the in vitro mineralization was also proposed.
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Affiliation(s)
- Gilberto Goissis
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
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Rosa FP, Lia RCC, de Souza KOF, Goissis G, Marcantonio E. Tissue response to polyanionic collagen: elastin matrices implanted in rat calvaria. Biomaterials 2003; 24:207-12. [PMID: 12419620 DOI: 10.1016/s0142-9612(02)00292-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The tissue response to polyanionic collagen matrices, prepared from bovine pericardium and implanted subperiosteally in rat calvaria, was studied. The materials were implanted in 72 male rats (Rattus norvegicus, albinus, Holtzman), randomly divided into four groups: GI-MBP hydrolyzed for 24 h; GII-MBP hydrolyzed for 36 h; GIII-MBP hydrolyzed for 48 h; GIV-native MBP. The materials were explanted after 15, 30 and 60 days and analyzed by routine histological procedures. Except for group IV (native bovine pericardium), polyanionic collagen from groups GI, GII and GIII showed low inflammatory reaction associated with bone formation, partially or completely integrated to the cranial bone; group GIV was characterized by an intense inflammatory reaction with occasional dystrophic mineralization and with occasional bone formation at 60 days when there was a decrease in the inflammatory reaction. Thus, the MBP from groups I, II and III were biologically compatible, enhancing bone formation with a slight delay at 60 days in GII.
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Affiliation(s)
- Fabiana Paim Rosa
- Department of Diagnosis and Surgery, Faculdade de Odontologia de Araraquara, Universidade Estadual Paulista, Araraquara, SP, Brazil
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Bet MR, Goissis G, Vargas S, Selistre-de-Araujo HS. Cell adhesion and cytotoxicity studies over polyanionic collagen surfaces with variable negative charge and wettability. Biomaterials 2003; 24:131-7. [PMID: 12417186 DOI: 10.1016/s0142-9612(02)00270-3] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This work describes the cytotoxicity, and the cell adhesion behavior of K562 cell line from human erythroleukemia transfected with the DNA for the alpha(2)beta(1) integrin over type-I collagen matrices with variable degree of carboxyl group and wettability. The results showed that type-I collagen materials with variable degree of carboxyl group prepared by selective hydrolysis of carboxyamide side chains of Asn and Gln residues present in the protein, independently from the extent of side chain hydrolysis, was characterized by preserved triple helix structure for materials with a carboxyl group content up to 87 +/- 17. Imbibition and wettability increased linearly with increasing carboxyl group content from 46 +/- 12 to 87 +/- 17, and no signs of cytotoxicity were detected. Nevertheless, in comparison to native collagen, K562 cell adhesion to PACMs was significantly improved by factors ranging from 1.60 to 1.47x, with the reduction in cell adhesion observed with increasing carboxyl content attributed to a balance between the inhibition of increasing negative charge and the stimulation by increased wettability. On the other hand, the overall improvement of K562 cell adhesion to polyanionic collagen was attributed to the introduction of new distinct motifs described as the minimal active recognition sequence for alpha(2)beta(1) integrins binding with type-I collagen produced as a result of Asn-Gly Glu-Ala alpha2(I)294-297, and Gly Gln-Arg-Gly Val-Val carboxyamide side chains hydrolysis.
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Affiliation(s)
- M R Bet
- Department of Chemistry and Molecular Physics, Institute of Chemistry, Universidade de São Paulo, SP Av Trabalhador Sãocarlense 400, São Carlos, São Paulo, CP 780-CEP 13560-970, Brazil
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