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Biomedyczne właściwości chitozanu – zastosowanie w inżynierii tkankowej Biomedical properties of chitosan: Application in tissue engineering. POSTEP HIG MED DOSW 2022. [DOI: 10.2478/ahem-2021-0015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstrakt
Inżynieria tkankowa to interdyscyplinarna dziedzina badań, która stosuje zasady inżynierii i nauk przyrodniczych do opracowywania substytutów biologicznych, przywracania, utrzymywania lub poprawy funkcji tkanek. Łączy medycy-nę kliniczną, inżynierię mechaniczną, materiałoznawstwo i biologię molekularną. Chitozan jest związkiem, który może być stosowany na szeroką skalę w biomedycynie, m.in. jako nośnik leków, nici chirurgiczne, materiały opatrunkowe przeznaczone do przyspieszonego gojenia ran oraz rusztowania komórkowe w inżynierii tkankowej. Chitozon spełnia najważniejsze kryteria dla biomateriałów, m.in. kompatybilność, odpowiednie właściwości mechaniczne, morfologia i porowatość, nietoksyczność i biodegradowalność. Rusztowania chitozanowe mogą sprzyjać adhezji, różnicowaniu i proliferacji na powierzchni komórek. Z chitozanu można tworzyć różne formy funkcjonalne w zależności od potrzeb i wymagań, w tym: hydrożele 3D, gąbki 3D, folie i membrany oraz nanowłókna. Ze względu na unikalne właściwości fizykochemiczne biopolimer ten może być również wykorzystany do oczyszczania białek terapeutycznych z endotoksyn bakteryjnych, co jest dziś istotnym problemem w oczyszczaniu produktu końcowego w zastosowaniach medycznych. Obecnie terapie oparte na białkach rekombinowanych znajdują szerokie zastosowanie w terapiach celowanych, inżynierii tkankowej oraz szeroko pojętej medycynie regeneracyjnej. Dlatego tak ważny jest współistniejący, dobrze zapro-jektowany system oczyszczania produktu białkowego, który nie zmieni swoich zasadniczych właściwości. Artykuł jest przeglądem aktualnych badań nad zastosowaniem materiałów bioaktywnych na bazie chitozanu w medycynie regene-racyjnej różnych tkanek i narządów (m.in. tkanki chrzęstnej i kostnej, tkanki skórnej czy tkanki nerwowej).
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Li Y, Fraser D, Mereness J, Van Hove A, Basu S, Newman M, Benoit DSW. Tissue Engineered Neurovascularization Strategies for Craniofacial Tissue Regeneration. ACS APPLIED BIO MATERIALS 2022; 5:20-39. [PMID: 35014834 PMCID: PMC9016342 DOI: 10.1021/acsabm.1c00979] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Craniofacial tissue injuries, diseases, and defects, including those within bone, dental, and periodontal tissues and salivary glands, impact an estimated 1 billion patients globally. Craniofacial tissue dysfunction significantly reduces quality of life, and successful repair of damaged tissues remains a significant challenge. Blood vessels and nerves are colocalized within craniofacial tissues and act synergistically during tissue regeneration. Therefore, the success of craniofacial regenerative approaches is predicated on successful recruitment, regeneration, or integration of both vascularization and innervation. Tissue engineering strategies have been widely used to encourage vascularization and, more recently, to improve innervation through host tissue recruitment or prevascularization/innervation of engineered tissues. However, current scaffold designs and cell or growth factor delivery approaches often fail to synergistically coordinate both vascularization and innervation to orchestrate successful tissue regeneration. Additionally, tissue engineering approaches are typically investigated separately for vascularization and innervation. Since both tissues act in concert to improve craniofacial tissue regeneration outcomes, a revised approach for development of engineered materials is required. This review aims to provide an overview of neurovascularization in craniofacial tissues and strategies to target either process thus far. Finally, key design principles are described for engineering approaches that will support both vascularization and innervation for successful craniofacial tissue regeneration.
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Affiliation(s)
- Yiming Li
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - David Fraser
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York 14620, United States.,Translational Biomedical Sciences Program, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Jared Mereness
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Amy Van Hove
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Sayantani Basu
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Maureen Newman
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York 14620, United States.,Translational Biomedical Sciences Program, University of Rochester Medical Center, Rochester, New York 14642, United States.,Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York 14642, United States.,Materials Science Program, University of Rochester, Rochester, New York 14627, United States.,Department of Chemical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Biomedical Genetics and Center for Oral Biology, University of Rochester Medical Center, Rochester, New York 14642, United States
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Li L, Li J, Zou Q, Zuo Y, Lin L, Cai B, Li Y. Lotus root and osteons-inspired channel structural scaffold mediate cell biomineralization and vascularized bone tissue regeneration. J Biomed Mater Res B Appl Biomater 2021; 110:1178-1191. [PMID: 34905286 DOI: 10.1002/jbm.b.34991] [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: 08/12/2021] [Revised: 11/19/2021] [Accepted: 12/05/2021] [Indexed: 11/05/2022]
Abstract
The interconnectivity of porous scaffold is vital for cell and tissue infiltration, and vascular networks formation, determining the successful bone regeneration in large bone defects. Here, inspired by the lotus-root and Haversian system of natural bone, a nano-hydroxyapatite/polyurethane (n-HA/PU) lotus root-like scaffold inlaid with micro holes on the wall of the adjacent channel was utilized to mediate cell biomineralization and vascularized bone tissue regeneration. Such a particular lotus-type structure remarkably promoted cells to proliferate and infiltrate into the center of the entire scaffold, serving as a clue to account for regulating cell alignment and differentiation physically. In vitro studies suggested that apatite accumulated dramatically on the channel wall in the lotus-type scaffold, probably promoting specific osteogenic differentiation of cells by the orientated channels, even in the absence of osteogenic factors. In vivo creation of critical bone defects (15-mm segments) was done in the radius of rabbits and implanted with the scaffold of different geometry to assess the structural parameters on the efficacy of new bone regeneration. The more extensive positive staining of BMP-2, more considerable amount of infiltrated capillary, more robust new bone formation, particularly the biomechanical strength of lotus-type scaffold group could reach the level of the control group without surgery, indicating that the lotus-type scaffold was more favorable for new bone tissue formation along tube-like channels. These results highlighted the potential of this biomimetic scaffold for cell and tissue infiltration and thus repair large bony defects.
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Affiliation(s)
- Limei Li
- Yunnan Key Laboratory of Stem Cell and Regenerative Medicine, Science and Technology Achievement Incubation Center, Kunming Medical University, Kunming, China
| | - Jidong Li
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Qin Zou
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Yi Zuo
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Lili Lin
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Bin Cai
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
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Raja MA, Maldonado M, Chen J, Zhong Y, Gu J. Development and Evaluation of Curcumin Encapsulated Self-assembled Nanoparticles as Potential Remedial Treatment for PCOS in a Female Rat Model. Int J Nanomedicine 2021; 16:6231-6247. [PMID: 34531655 PMCID: PMC8439717 DOI: 10.2147/ijn.s302161] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 08/17/2021] [Indexed: 02/05/2023] Open
Abstract
PURPOSE Polycystic ovary syndrome (PCOS) is one of the most common endocrinopathies affecting women of reproductive age and leads to metabolic disorders and infertility. The present study was conducted to investigate the therapeutic effects of curcumin (Cur) encapsulated arginine (Arg) and N-acetyl histidine (NAcHis) modified chitosan (Arg-CS-NAcHis/Cur) nanoparticles (NPs). METHODS In this study, amphiphilic chitosan (CS) conjugate was developed by modification with hydrophilic arginine (Arg) and hydrophobic N-acetyl histidine (NAcHis) group (Arg-CS-NAcHis). The synthesized conjugate was well characterized by FTIR and NMR studies. Self-assembled nanoparticles based on the synthesized conjugate were developed by simple sonication method and characterized for the physicochemical properties of zeta potential, particle size and drug encapsulation. Next, in vitro drug release, cytotoxicity, and cellular uptake studies of the NPs were evaluated. Finally, the developed nanoparticles were examined for their therapeutic potential against estradiol valerate (EV) induced PCOS rats by evaluating hormone level changes and ovarian morphology. RESULTS The results showed that zeta potential of the nanoparticles was 39.8±2.52 mV and the average size was 200 nm. The in vitro drug release profile showed sustained release pattern. Cytotoxicity and cellular uptake studies also showed preferential effectiveness than free curcumin. Both the biochemical and histopathological studies showed positive effects in reverting the symptoms of PCOS rats to normalcy. CONCLUSION Curcumin encapsulated arginine and N-acetyl histidine modified chitosan (Arg-CS-NAcHis/Cur) nanoparticles have been successfully developed. The present study suggested that treatment of the nanoparticles might reverse many of the PCOS symptoms. Therefore, these nanoparticles might be used as promising new candidate for delivery of curcumin to treat PCOS.
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Affiliation(s)
- Mazhar Ali Raja
- Laboratory of Molecular Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Pathology, Center of Molecular Diagnosis and Personalized Medicine, Shantou University Medical College, Shantou, People’s Republic of China
- Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Reproductive Center of Chengdu Jinjiang District Maternal and Child Health Hospital, Chengdu, People’s Republic of China
| | - Martin Maldonado
- Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Reproductive Center of Chengdu Jinjiang District Maternal and Child Health Hospital, Chengdu, People’s Republic of China
| | - Jianying Chen
- Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Reproductive Center of Chengdu Jinjiang District Maternal and Child Health Hospital, Chengdu, People’s Republic of China
| | - Ying Zhong
- Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Reproductive Center of Chengdu Jinjiang District Maternal and Child Health Hospital, Chengdu, People’s Republic of China
| | - Jiang Gu
- Laboratory of Molecular Pathology, Provincial Key Laboratory of Infectious Diseases and Molecular Pathology, Center of Molecular Diagnosis and Personalized Medicine, Shantou University Medical College, Shantou, People’s Republic of China
- Chengdu Jinxin Research Institute for Reproductive Medicine and Genetics, Reproductive Center of Chengdu Jinjiang District Maternal and Child Health Hospital, Chengdu, People’s Republic of China
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Castro JI, Chaur MN, Llano CHV, Valencia Zapata ME, Mina Hernandez JH, Grande-Tovar CD. Biocompatibility Study of Electrospun Nanocomposite Membranes Based on Chitosan/Polyvinyl Alcohol/Oxidized Carbon Nano-Onions. Molecules 2021; 26:4753. [PMID: 34443341 PMCID: PMC8400231 DOI: 10.3390/molecules26164753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/29/2021] [Accepted: 08/03/2021] [Indexed: 12/02/2022] Open
Abstract
In recent decades, the number of patients requiring biocompatible and resistant implants that differ from conventional alternatives dramatically increased. Among the most promising are the nanocomposites of biopolymers and nanomaterials, which pretend to combine the biocompatibility of biopolymers with the resistance of nanomaterials. However, few studies have focused on the in vivo study of the biocompatibility of these materials. The electrospinning process is a technique that produces continuous fibers through the action of an electric field imposed on a polymer solution. However, to date, there are no reports of chitosan (CS) and polyvinyl alcohol (PVA) electrospinning with carbon nano-onions (CNO) for in vivo implantations, which could generate a resistant and biocompatible material. In this work, we describe the synthesis by the electrospinning method of four different nanofibrous membranes of chitosan (CS)/(PVA)/oxidized carbon nano-onions (ox-CNO) and the subdermal implantations after 90 days in Wistar rats. The results of the morphology studies demonstrated that the electrospun nanofibers were continuous with narrow diameters (between 102.1 nm ± 12.9 nm and 147.8 nm ± 29.4 nm). The CS amount added was critical for the diameters used and the successful electrospinning procedure, while the ox-CNO amount did not affect the process. The crystallinity index was increased with the ox-CNO introduction (from 0.85% to 12.5%), demonstrating the reinforcing effect of the nanomaterial. Thermal degradation analysis also exhibited reinforcement effects according to the DSC and TGA analysis, with the higher ox-CNO content. The biocompatibility of the nanofibers was comparable with the porcine collagen, as evidenced by the subdermal implantations in biological models. In summary, all the nanofibers were reabsorbed without a severe immune response, indicating the usefulness of the electrospun nanocomposites in biomedical applications.
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Affiliation(s)
- Jorge Iván Castro
- Grupo de Investigación SIMERQO, Departamento de Química, Universidad del Valle, Calle 13 No. 100-00, 76001 Cali, Colombia; (J.I.C.); (M.N.C.)
| | - Manuel N. Chaur
- Grupo de Investigación SIMERQO, Departamento de Química, Universidad del Valle, Calle 13 No. 100-00, 76001 Cali, Colombia; (J.I.C.); (M.N.C.)
| | | | - Mayra Eliana Valencia Zapata
- Grupo de Materiales Compuestos, Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, 760032 Santiago de Cali, Colombia; (M.E.V.Z.); (J.H.M.H.)
| | - José Herminsul Mina Hernandez
- Grupo de Materiales Compuestos, Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, 760032 Santiago de Cali, Colombia; (M.E.V.Z.); (J.H.M.H.)
| | - Carlos David Grande-Tovar
- Grupo de Investigación de Fotoquímica y Fotobiología, Facultad de Ciencias, Universidad del Atlántico, Carrera 30 Número 8-49, 081008 Puerto Colombia, Colombia
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Ando A, Kamikura M, Takeoka Y, Rikukawa M, Nakano K, Nagaya M, Nagashima H, Aizawa M. Bioresorbable porous β-tricalcium phosphate chelate-setting cements with poly(lactic-co-glycolic acid) particles as pore-forming agent: fabrication, material properties, cytotoxicity, and in vivo evaluation. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2021; 22:511-521. [PMID: 34220339 PMCID: PMC8231386 DOI: 10.1080/14686996.2021.1936628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 06/13/2023]
Abstract
Calcium-phosphate cements (CPCs) have been used as bone filling materials in orthopaedic surgery. However, CPCs are set using an acid-base reaction, and then change into stable hydroxyapatite (HAp) in a living body. Therefore, we developed bioresorbable chelate-setting β-tricalcium phosphate (β-TCP) cements based on surface modifications of inositol phosphate (IP6). In order to improve the bioresorbability, we fabricated IP6/β-TCP cements hybridized with poly(lactic-co-glycolic acid) (PLGA) particles as a pore-forming agent. The compressive strengths of the cements with the amounts of 5 and 10 mass% PLGA particles were 23.2 and 22.8 MPa, respectively. There was no significant difference from cements without PLGA (23.4 MPa). The setting times of the cement specimens with PLGA particles (30 min) were a little longer than those without PLGA particles (26.3 min). The lack of cytotoxicity of the cement specimens was confirmed using osteoblast-like cells (MC3T3-E1). Cylindrical defects were made by drilling into the tibia of mini-pigs and injecting the prepared cement pastes into the defects. Twelve weeks after implantation the specimens were stained with toluidine blue and histologically evaluated. Histological evaluation of cement specimens with PLGA particles showed enhanced bioresorbability. Newly-formed bone was also observed inside cement specimens with PLGA particles. The IP6/β-TCP cement specimens with PLGA particles had excellent material properties, such as injectability, compressive strength, high porosity, no cytotoxicity in vitro, bioresorption and bone formation abilities in vivo. Organic-inorganic hybridized CPCs are expected to be valuable as novel biodegradable paste-like artificial bone fillers.
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Affiliation(s)
- Akihiro Ando
- Department of Applied Chemistry, School of Science and Technology, Meiji University, Kanagawa, Japan
| | - Maho Kamikura
- Department of Applied Chemistry, School of Science and Technology, Meiji University, Kanagawa, Japan
| | - Yuko Takeoka
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo, Japan
| | - Masahiro Rikukawa
- Department of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, Tokyo, Japan
| | - Kazuaki Nakano
- Meiji University International Institute for Bio-Resource Research, Meiji University, Kanagawa, Japan
| | - Masaki Nagaya
- Meiji University International Institute for Bio-Resource Research, Meiji University, Kanagawa, Japan
| | - Hiroshi Nagashima
- Meiji University International Institute for Bio-Resource Research, Meiji University, Kanagawa, Japan
- Department of Life Sciences, School of Agriculture, Meiji University, Kanagawa, Japan
| | - Mamoru Aizawa
- Department of Applied Chemistry, School of Science and Technology, Meiji University, Kanagawa, Japan
- Meiji University International Institute for Materials with Life Functions, Meiji University, Kanagawa, Japan
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Lopes SV, Collins MN, Reis RL, Oliveira JM, Silva-Correia J. Vascularization Approaches in Tissue Engineering: Recent Developments on Evaluation Tests and Modulation. ACS APPLIED BIO MATERIALS 2021; 4:2941-2956. [DOI: 10.1021/acsabm.1c00051] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Soraia V. Lopes
- 3B’s Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães 4805-017, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Maurice N. Collins
- Bernal Institute, School of Engineering, University of Limerick, Limerick V94 T9PX, Ireland
| | - Rui L. Reis
- 3B’s Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães 4805-017, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joaquim M. Oliveira
- 3B’s Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães 4805-017, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joana Silva-Correia
- 3B’s Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães 4805-017, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, Braga/Guimarães, Portugal
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Grande Tovar CD, Castro JI, Valencia Llano CH, Navia Porras DP, Delgado Ospina J, Valencia Zapata ME, Herminsul Mina Hernandez J, Chaur MN. Synthesis, Characterization, and Histological Evaluation of Chitosan-Ruta Graveolens Essential Oil Films. Molecules 2020; 25:molecules25071688. [PMID: 32272702 PMCID: PMC7180789 DOI: 10.3390/molecules25071688] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/31/2020] [Accepted: 04/03/2020] [Indexed: 01/25/2023] Open
Abstract
The development of new biocompatible materials for application in the replacement of deteriorated tissues (due to accidents and diseases) has gained a lot of attention due to the high demand around the world. Tissue engineering offers multiple options from biocompatible materials with easy resorption. Chitosan (CS) is a biopolymer derived from chitin, the second most abundant polysaccharide in nature, which has been highly used for cell regeneration applications. In this work, CS films and Ruta graveolens essential oil (RGEO) were incorporated to obtain porous and resorbable materials, which did not generate allergic reactions. An oil-free formulation (F1: CS) and three different formulations containing R. graveolens essential oil were prepared (F2: CS-RGEO 0.5%; F3: CS+RGEO 1.0%; and F4: CS+RGEO 1.5%) to evaluate the effect of the RGEO incorporation in the mechanical and thermal stability of the films. Infrared spectroscopy (FTIR) analyses demonstrated the presence of RGEO. In contrast, X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis showed that the crystalline structure and percentage of CS were slightly affected by the RGEO incorporation. Interesting saturation phenomena were observed for mechanical and water permeability tests when RGEO was incorporated at higher than 0.5% (v/v). The results of subdermal implantation after 30 days in Wistar rats showed that increasing the amount of RGEO resulted in greater resorption of the material, but also more significant inflammation of the tissue surrounding the materials. On the other hand, the thermal analysis showed that the RGEO incorporation almost did not affect thermal degradation. However, mechanical properties demonstrated an understandable loss of tensile strength and Young’s modulus for F3 and F4. However, given the volatility of the RGEO, it was possible to generate a slightly porous structure, as can be seen in the microstructure analysis of the surface and the cross-section of the films. The cytotoxicity analysis of the CS+RGEO compositions by the hemolysis technique agreed with in vivo results of the low toxicity observed. All these results demonstrate that films including crude essential oil have great application potential in the biomedical field.
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Affiliation(s)
- Carlos David Grande Tovar
- Grupo de Investigación de Fotoquímica y Fotobiología, Universidad del Atlántico, Carrera 30 Número 8-49, Puerto Colombia 081008, Colombia;
| | - Jorge Iván Castro
- Grupo de Investigación SIMERQO, Departamento de Química, Universidad del Valle, Calle 13 No. 100-00, Cali 76001, Colombia;
| | | | - Diana Paola Navia Porras
- Grupo de Investigación Biotecnología, Facultad de Ingeniería, Universidad de San Buenaventura Cali, Carrera 122 # 6-65, Cali 76001, Colombia; (D.P.N.P.); (J.D.O.)
| | - Johannes Delgado Ospina
- Grupo de Investigación Biotecnología, Facultad de Ingeniería, Universidad de San Buenaventura Cali, Carrera 122 # 6-65, Cali 76001, Colombia; (D.P.N.P.); (J.D.O.)
| | - Mayra Eliana Valencia Zapata
- Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia;
| | - José Herminsul Mina Hernandez
- Escuela de Ingeniería de Materiales, Facultad de Ingeniería, Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia;
- Correspondence: (J.H.M.H.); (M.N.C.); Tel.: +572-3212100 (J.H.M.H.)
| | - Manuel N. Chaur
- Grupo de Investigación SIMERQO, Departamento de Química, Universidad del Valle, Calle 13 No. 100-00, Cali 76001, Colombia;
- Centro de Excelencia en Nuevos Materiales (CENM), Universidad del Valle, Calle 13 No. 100-00, Santiago de Cali 760032, Colombia
- Correspondence: (J.H.M.H.); (M.N.C.); Tel.: +572-3212100 (J.H.M.H.)
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Pinto RV, Gomes PS, Fernandes MH, Costa ME, Almeida MM. Glutaraldehyde-crosslinking chitosan scaffolds reinforced with calcium phosphate spray-dried granules for bone tissue applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110557. [DOI: 10.1016/j.msec.2019.110557] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 12/14/2022]
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Yao R, Zhang B, Gao T, Zhang N, Wang Y, Meng G, He J, Wu F. Dopamine enhances the mechanical and biological properties of enzyme-induced mineralized hydrogels. J Mater Chem B 2020. [DOI: 10.1039/d0tb01774d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Enzyme-induced mineralization is an effective approach to improving the mechanical properties of acrylamide hydrogel and dopamine biofunctionalization can further significantly improve both the biological properties and the mechanical properties.
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Affiliation(s)
- Ruijuan Yao
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Bo Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Tao Gao
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Nihui Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Yao Wang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Guolong Meng
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Jing He
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Fang Wu
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
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11
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Daly AC, Riley L, Segura T, Burdick JA. Hydrogel microparticles for biomedical applications. NATURE REVIEWS. MATERIALS 2020; 5:20-43. [PMID: 34123409 PMCID: PMC8191408 DOI: 10.1038/s41578-019-0148-6] [Citation(s) in RCA: 520] [Impact Index Per Article: 130.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Hydrogel microparticles (HMPs) are promising for biomedical applications, ranging from the therapeutic delivery of cells and drugs to the production of scaffolds for tissue repair and bioinks for 3D printing. Biologics (cells and drugs) can be encapsulated into HMPs of predefined shapes and sizes using a variety of fabrication techniques (batch emulsion, microfluidics, lithography, electrohydrodynamic (EHD) spraying and mechanical fragmentation). HMPs can be formulated in suspensions to deliver therapeutics, as aggregates of particles (granular hydrogels) to form microporous scaffolds that promote cell infiltration or embedded within a bulk hydrogel to obtain multiscale behaviours. HMP suspensions and granular hydrogels can be injected for minimally invasive delivery of biologics, and they exhibit modular properties when comprised of mixtures of distinct HMP populations. In this Review, we discuss the fabrication techniques that are available for fabricating HMPs, as well as the multiscale behaviours of HMP systems and their functional properties, highlighting their advantages over traditional bulk hydrogels. Furthermore, we discuss applications of HMPs in the fields of cell delivery, drug delivery, scaffold design and biofabrication.
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Affiliation(s)
- Andrew C Daly
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
- These authors contributed equally: Andrew C. Daly, Lindsay Riley
| | - Lindsay Riley
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- These authors contributed equally: Andrew C. Daly, Lindsay Riley
| | - Tatiana Segura
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
- Departments of Dermatology and Neurology, Duke University, Durham, NC, USA
| | - Jason A Burdick
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
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12
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Riley L, Schirmer L, Segura T. Granular hydrogels: emergent properties of jammed hydrogel microparticles and their applications in tissue repair and regeneration. Curr Opin Biotechnol 2019; 60:1-8. [PMID: 30481603 PMCID: PMC6534490 DOI: 10.1016/j.copbio.2018.11.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/03/2018] [Accepted: 11/05/2018] [Indexed: 01/24/2023]
Abstract
Granular hydrogels are emerging as a versatile and effective platform for tissue engineered constructs in regenerative medicine. The hydrogel microparticles (HMPs) that compose these materials exhibit particle jamming above a minimum packing fraction, which results in a bulk, yet dynamic, granular hydrogel scaffold. These injectable, microporous scaffolds possess self-assembling, shear-thinning, and self-healing properties. Recently, they have been utilized as cell cultures platforms and extracellular matrix mimics with remarkable success in promoting cellular infiltration and subsequent tissue remodeling in vivo. Furthermore, the modular nature of granular hydrogels accommodates heterogeneous HMP assembly, where varying HMPs have been fabricated to target distinct biological processes or deliver unique cargo. Such multifunctional materials offer enormous potential for capturing the structural and biofunctional complexity observed in native human tissue.
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Affiliation(s)
- Lindsay Riley
- Department of Biomedical Engineering, Duke University, United States
| | - Lucas Schirmer
- Department of Biomedical Engineering, Duke University, United States
| | - Tatiana Segura
- Department of Biomedical Engineering, Duke University, United States; Department of Dermatology, Duke University, United States; Department of Neurology, Duke University, United States.
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13
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Salgado CL, Teixeira BIB, Monteiro FJM. Biomimetic Composite Scaffold With Phosphoserine Signaling for Bone Tissue Engineering Application. Front Bioeng Biotechnol 2019; 7:206. [PMID: 31552233 PMCID: PMC6743420 DOI: 10.3389/fbioe.2019.00206] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 08/12/2019] [Indexed: 01/05/2023] Open
Abstract
In guided bone tissue engineering, successful ingrowth of MSCs depends primarily on the nature of the scaffold. It is well-known that only seconds after implantation, biomaterials are coated by a layer of adsorbed proteins/peptides which modulates the subsequent cell/scaffold interactions, especially at early times after implantation. In this work, nanohydroxyapatite and collagen based composite materials (Coll/nanoHA) were modified with phosphorylated amino acid (O-phospho-L-serine-OPS) to mimic bone tissue, and induce cell differentiation. The choice for this phosphorylated amino acid is due to the fact that osteopontin is a serine-rich glycol-phosphoprotein and has been associated to the early stages of bone formation, and regeneration. Several concentrations of OPS were added to the Coll/nanoHA scaffold and physico-chemical, mechanical, and in vitro cell behavior were evaluated. Afterwards, the composite scaffold with stronger mechanical and best cellular behavior was tested in vivo, with or without previous in vitro culture of human MSC's (bone tissue engineering). The OPS signaling of the biocomposite scaffolds showed similar cellular adhesion and proliferation, but higher ALP enzyme activity (HBMSC). In vivo bone ectopic formation studies allowed for a thorough evaluation of the materials for MSC's osteogenic differentiation. The OPS-scaffolds results showed that the material could modulated mesenchymal cells behavior in favor of osteogenic differentiation into late osteoblasts that gave raised to their ECM with human bone proteins (osteopontin) and calcium deposits. Finally, OPS-modified scaffolds enhanced cell survival, engraftment, migration, and spatial distribution within the 3D matrix that could be used as a cell-loaded scaffold for tissue engineering applications and accelerate bone regeneration processes.
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Affiliation(s)
- Christiane Laranjo Salgado
- i3S–Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB–Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia (FEUP), DEMM, Universidade do Porto, Porto, Portugal
| | - Beatriz Isabel Brites Teixeira
- i3S–Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB–Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Institute of Health Sciences (ICS), Universidade Católica Portuguesa, Viseu, Portugal
| | - Fernando Jorge Mendes Monteiro
- i3S–Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB–Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia (FEUP), DEMM, Universidade do Porto, Porto, Portugal
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14
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Sarker MD, Naghieh S, Sharma NK, Ning L, Chen X. Bioprinting of Vascularized Tissue Scaffolds: Influence of Biopolymer, Cells, Growth Factors, and Gene Delivery. JOURNAL OF HEALTHCARE ENGINEERING 2019; 2019:9156921. [PMID: 31065331 PMCID: PMC6466897 DOI: 10.1155/2019/9156921] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 02/03/2019] [Indexed: 01/16/2023]
Abstract
Over the past decades, tissue regeneration with scaffolds has achieved significant progress that would eventually be able to solve the worldwide crisis of tissue and organ regeneration. While the recent advancement in additive manufacturing technique has facilitated the biofabrication of scaffolds mimicking the host tissue, thick tissue regeneration remains challenging to date due to the growing complexity of interconnected, stable, and functional vascular network within the scaffold. Since the biological performance of scaffolds affects the blood vessel regeneration process, perfect selection and manipulation of biological factors (i.e., biopolymers, cells, growth factors, and gene delivery) are required to grow capillary and macro blood vessels. Therefore, in this study, a brief review has been presented regarding the recent progress in vasculature formation using single, dual, or multiple biological factors. Besides, a number of ways have been presented to incorporate these factors into scaffolds. The merits and shortcomings associated with the application of each factor have been highlighted, and future research direction has been suggested.
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Affiliation(s)
- M. D. Sarker
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Saman Naghieh
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - N. K. Sharma
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Liqun Ning
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Xiongbiao Chen
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK, Canada
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15
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16
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Li H, Hu C, Yu H, Chen C. Chitosan composite scaffolds for articular cartilage defect repair: a review. RSC Adv 2018; 8:3736-3749. [PMID: 35542907 PMCID: PMC9077838 DOI: 10.1039/c7ra11593h] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 12/26/2017] [Indexed: 01/31/2023] Open
Abstract
Articular cartilage (AC) defects lack the ability to self-repair due to their avascular nature and the declined mitotic ability of mature chondrocytes. To date, cartilage tissue engineering using implanted scaffolds containing cells or growth factors is the most promising defect repair method. Scaffolds for cartilage tissue engineering have been comprehensively researched. As a promising scaffold biomaterial for AC defect repair, the properties of chitosan are summarized in this review. Strategies to composite chitosan with other materials, such as polymers (including collagen, gelatin, alginate, silk fibroin, poly-caprolactone, and poly-lactic acid) and bioceramics (including calcium phosphate, calcium polyphosphate, and hydroxyapatite) are presented. Methods to manufacture three-dimensional porous structures to support cell attachment and nutriment exchange have also been included. Properties of chitosan/polymer and chitosan/bioceramic composite scaffolds for articular cartilage defect repair are reviewed.![]()
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Affiliation(s)
- Huijun Li
- Shenzhen Research Institute of Shandong University
- Shenzhen 518057
- P. R. China
- Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University)
- Ministry of Education
| | - Cheng Hu
- Shenzhen Research Institute of Shandong University
- Shenzhen 518057
- P. R. China
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
| | - Huijun Yu
- Shenzhen Research Institute of Shandong University
- Shenzhen 518057
- P. R. China
- Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Shandong University)
- Ministry of Education
| | - Chuanzhong Chen
- Shenzhen Research Institute of Shandong University
- Shenzhen 518057
- P. R. China
- Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education)
- School of Materials Science and Engineering
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17
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Ruphuy G, Souto‐Lopes M, Paiva D, Costa P, Rodrigues AE, Monteiro FJ, Salgado CL, Fernandes MH, Lopes JC, Dias MM, Barreiro MF. Supercritical CO
2
assisted process for the production of high‐purity and sterile nano‐hydroxyapatite/chitosan hybrid scaffolds. J Biomed Mater Res B Appl Biomater 2017; 106:965-975. [DOI: 10.1002/jbm.b.33903] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 02/20/2017] [Accepted: 03/18/2017] [Indexed: 01/16/2023]
Affiliation(s)
- G. Ruphuy
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCM, Faculty of EngineeringUniversity of Porto Portugal
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCMBragança Polytechnic Institute Bragança Portugal
| | - M. Souto‐Lopes
- INEB‐Institute of Biomedical EngineeringUniversity of Porto Portugal
- Department of Metallurgical and Materials EngineeringFaculty of Engineering of the University of Porto Portugal
- i3S‐Instituto de Investigação e Inovação em Saúde, University of Porto Portugal
| | - D. Paiva
- Laboratory of Process EngineeringEnvironment, Biotechnology and Energy LEPABE, Faculty of Engineering, University of Porto Portugal
| | - P. Costa
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCM, Faculty of EngineeringUniversity of Porto Portugal
| | - A. E. Rodrigues
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCM, Faculty of EngineeringUniversity of Porto Portugal
| | - F. J. Monteiro
- INEB‐Institute of Biomedical EngineeringUniversity of Porto Portugal
- Department of Metallurgical and Materials EngineeringFaculty of Engineering of the University of Porto Portugal
- i3S‐Instituto de Investigação e Inovação em Saúde, University of Porto Portugal
| | - C. L. Salgado
- INEB‐Institute of Biomedical EngineeringUniversity of Porto Portugal
- Department of Metallurgical and Materials EngineeringFaculty of Engineering of the University of Porto Portugal
- i3S‐Instituto de Investigação e Inovação em Saúde, University of Porto Portugal
| | - M. H. Fernandes
- Laboratory for Bone Metabolism and RegenerationFaculty of Dental Medicine of the University of Porto FMDUP Portugal
- REQUIMTE/LAQV, University of Porto Portugal
| | - J. C. Lopes
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCM, Faculty of EngineeringUniversity of Porto Portugal
| | - M. M. Dias
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCM, Faculty of EngineeringUniversity of Porto Portugal
| | - M. F. Barreiro
- Laboratory of Separation and Reaction Engineering ‐ Laboratory of Catalysis and Materials LSRE‐LCMBragança Polytechnic Institute Bragança Portugal
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18
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Santos NF, Cicuéndez M, Holz T, Silva VS, Fernandes AJS, Vila M, Costa FM. Diamond-Graphite Nanoplatelet Surfaces as Conductive Substrates for the Electrical Stimulation of Cell Functions. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1331-1342. [PMID: 28001360 DOI: 10.1021/acsami.6b14407] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The nanocarbon allotropes constitute valid alternatives when designing control and actuation devices for electrically assisted tissue regeneration purposes, gathering among them important characteristics such as chemical inertness, biocompatibility, extreme mechanical properties, and, importantly, low and tailorable electrical resistivity. In this work, coatings of thin (100 nm) vertically aligned nanoplatelets composed of diamond (5 nm) and graphite were produced via a microwave plasma chemical vapor deposition (MPCVD) technique and used as substrates for electrical stimulation of MC3T3-E1 preosteoblasts. Increasing the amount of N2 up to 14.5 vol % during growth lowers the coatings' electrical resistivity by over 1 order of magnitude, triggers the nanoplatelet vertical growth, and leads to the higher crystalline quality of the nanographite phase. When preosteoblasts were cultured on these substrates and subjected to two consecutive daily cycles of 3 μA direct current stimulation, enhanced cell proliferation and metabolism were observed accompanied by high cell viability. Furthermore, in the absence of DC stimulation, alkaline phosphatase (ALP) activity is increased significantly, denoting an up-regulating effect of preosteoblastic maturation intrinsically exerted by the nanoplatelet substrates.
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Affiliation(s)
- N F Santos
- i3N and Physics Department, University of Aveiro , 3810-193 Aveiro, Portugal
| | - M Cicuéndez
- TEMA-NRG, Mechanical Engineering Department and CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro , 3810-193 Aveiro, Portugal
| | - T Holz
- i3N and Physics Department, University of Aveiro , 3810-193 Aveiro, Portugal
| | - V S Silva
- CESAM, Biology Department, University of Aveiro , 3810-193 Aveiro, Portugal
| | - A J S Fernandes
- i3N and Physics Department, University of Aveiro , 3810-193 Aveiro, Portugal
| | - M Vila
- TEMA-NRG, Mechanical Engineering Department, University of Aveiro , 3810-193 Aveiro, Portugal
| | - F M Costa
- i3N and Physics Department, University of Aveiro , 3810-193 Aveiro, Portugal
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19
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Cao L, Weng W, Chen X, Zhang J, Zhou Q, Cui J, Wang L, Shin JW, Su J. Effects of mesoporous calcium magnesium silicate on setting time, compressive strength, apatite formation, degradability and cell behavior to magnesium phosphate based bone cements. RSC Adv 2017. [DOI: 10.1039/c6ra25503e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Mesoporous calcium magnesium silicate was doped into magnesium phosphate to fabricate magnesium phosphate based composite cements (MBC).
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Affiliation(s)
- Liehu Cao
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Weizong Weng
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Xiao Chen
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Jun Zhang
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Qirong Zhou
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Jin Cui
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Lin Wang
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
| | - Jung-Woog Shin
- Department of Biomedical Engineering
- Inje University
- Gimhae
- Republic of Korea
| | - Jiacan Su
- Department of Orthopaedics Trauma
- Changhai Hospital
- Second Military Medical University
- Shanghai 200433
- China
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20
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Raja MA, Zeenat S, Arif M, Liu C. Self-assembled nanoparticles based on amphiphilic chitosan derivative and arginine for oral curcumin delivery. Int J Nanomedicine 2016; 11:4397-4412. [PMID: 27660435 PMCID: PMC5019276 DOI: 10.2147/ijn.s106116] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Curcumin (Cur) is a striking anticancer agent, but its low aqueous solubility, poor absorption, hasty metabolism, and elimination limit its oral bioavailability and consequently hinder its development as a drug. To redress these limitations, amphiphilic chitosan (CS) conjugate with improved mucoadhesion and solubility over a wider pH range was developed by modification with hydrophobic acrylonitrile (AN) and hydrophilic arginine (Arg); the synthesized conjugate (AN–CS–Arg), which was well characterized by Fourier transform infrared and 1H nuclear magnetic resonance spectroscopy. Results of critical aggregation concentration revealed that the AN–CS–Arg conjugate had low critical aggregation concentration and was prone to form self-assembled nanoparticles (NPs) in aqueous medium. Cur-encapsulated AN–CS–Arg NPs (AN–CS–Arg/Cur NPs) were developed by a simple sonication method and characterized for the physicochemical parameters such as zeta potential, particle size, and drug encapsulation. The results showed that zeta potential of the prepared NPs was 40.1±2.81 mV and the average size was ~218 nm. A considerable improvement in the aqueous solubility of Cur was observed after encapsulation into AN–CS–Arg/Cur NPs. With the increase in Cur concentration, loading efficiency increased but encapsulation efficiency decreased. The in vitro release profile exhibited sustained release pattern from the AN–CS–Arg/Cur NPs in typical biological buffers. The ex vivo mucoadhesion study revealed that AN–CS–Arg/Cur NPs had greater mucoadhesion than the control CS NPs. Compared with free Cur solution, AN–CS–Arg/Cur NPs showed stronger dose-dependent cytotoxicity against HT-29 cells. In addition, it was observed that cell uptake of AN–CS–Arg/Cur NPs was much higher compared with free Cur. Furthermore, the in vivo pharmacokinetic results in rats demonstrated that the AN–CS–Arg/Cur NPs could remarkably improve the oral bioavailability of Cur. Therefore, the developed AN–CS–Arg/Cur NPs might be a promising nano-candidate for oral delivery of Cur.
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Affiliation(s)
- Mazhar Ali Raja
- College of Marine Life Science, Ocean University of China, Qingdao, Shandong, People's Republic of China
| | - Shah Zeenat
- College of Marine Life Science, Ocean University of China, Qingdao, Shandong, People's Republic of China
| | - Muhammad Arif
- College of Marine Life Science, Ocean University of China, Qingdao, Shandong, People's Republic of China
| | - Chenguang Liu
- College of Marine Life Science, Ocean University of China, Qingdao, Shandong, People's Republic of China
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21
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Xiao Q, Zhou K, Chen C, Jiang M, Zhang Y, Luo H, Zhang D. Hollow and porous hydroxyapatite microspheres prepared with an O/W emulsion by spray freezing method. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:1068-74. [PMID: 27612804 DOI: 10.1016/j.msec.2016.07.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 07/18/2016] [Accepted: 07/31/2016] [Indexed: 02/06/2023]
Abstract
Microspheres with hollow and/or porous structures have been widely used in various applications. A new method of spraying and freezing emulsions was developed to prepare hollow HA (hydroxyapatite) microspheres with interconnected pores by using PVA (polyvinyl alcohol) as emulsifiers and binders. The relationships between viscosity and shear time or rates were tested and the dispersing stability of oil in water (O/W) emulsions was characterized with comparison to suspensions without the addition of oil phase. The effects of solid loadings of HA and the volume ratio between oil and water on the morphologies of microspheres were investigated. Hollow HA microspheres with particle diameter of ~20μm and pore size of ~0.6μm were successfully obtained by spray freezing method. Besides, drying and sintering processes were crucial to the formation of hollow and porous structures, respectively. The gentamicin loading and releasing of HA porous microspheres with different hollow volumes were tested.
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Affiliation(s)
- Qiyao Xiao
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Kechao Zhou
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Chao Chen
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Mingxiang Jiang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Yan Zhang
- Department of Mechanical Engineering, University of Bath, Bath BA2 7AY, UK
| | - Hang Luo
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Dou Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China.
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22
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Uswatta SP, Okeke IU, Jayasuriya AC. Injectable porous nano-hydroxyapatite/chitosan/tripolyphosphate scaffolds with improved compressive strength for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:505-12. [PMID: 27612741 DOI: 10.1016/j.msec.2016.06.089] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 06/22/2016] [Accepted: 06/26/2016] [Indexed: 12/25/2022]
Abstract
In this study we have fabricated porous injectable spherical scaffolds using chitosan biopolymer, sodium tripolyphosphate (TPP) and nano-hydroxyapatite (nHA). TPP was primarily used as an ionic crosslinker to crosslink nHA/chitosan droplets. We hypothesized that incorporating nHA into chitosan could support osteoconduction by emulating the mineralized cortical bone structure, and improve the Ultimate Compressive Strength (UCS) of the scaffolds. We prepared chitosan solutions with 0.5%, 1% and 2% (w/v) nHA concentration and used simple coacervation and lyophilization techniques to obtain spherical scaffolds. Lyophilized spherical scaffolds had a mean diameter of 1.33mm (n=25). Further, portion from each group lyophilized scaffolds were soaked and dried to obtain Lyophilized Soaked and Dried (LSD) scaffolds. LSD scaffolds had a mean diameter of 0.93mm (n=25) which is promising property for the injectability. Scanning Electron Microscopy images showed porous surface morphology and interconnected pore structures inside the scaffolds. Lyophilized and LSD scaffolds had surface pores <10 and 2μm, respectively. 2% nHA/chitosan LSD scaffolds exhibited UCS of 8.59MPa compared to UCS of 2% nHA/chitosan lyophilized scaffolds at 3.93MPa. Standardize UCS values were 79.98MPa and 357MPa for 2% nHA/chitosan lyophilized and LSD particles respectively. One-way ANOVA results showed a significant increase (p<0.001) in UCS of 1% and 2% nHA/chitosan lyophilized scaffolds compared to 0% and 0.5% nHA/chitosan lyophilized scaffolds. Moreover, 2% nHA LSD scaffolds had significantly increased (p<0.005) their mean UCS by 120% compared to 2% nHA lyophilized scaffolds. In a drawback, all scaffolds have lost their mechanical properties by 95% on the 2nd day when fully immersed in phosphate buffered saline. Additionally live and dead cell assay showed no cytotoxicity and excellent osteoblast attachment to both lyophilized and LSD scaffolds at the end of 14th day of in vitro studies. 2% nHA/chitosan scaffolds showed higher osteoblast attachment than 0% nHA/chitosan scaffolds.
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Affiliation(s)
- Suren P Uswatta
- Department of Bioengineering, The University of Toledo, Toledo, OH 43614, USA
| | - Israel U Okeke
- Department of Bioengineering, The University of Toledo, Toledo, OH 43614, USA
| | - Ambalangodage C Jayasuriya
- Department of Bioengineering, The University of Toledo, Toledo, OH 43614, USA; Department of Orthopaedic Surgery, The University of Toledo, Toledo, OH 43614, USA.
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23
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Bhardwaj N, Singh YP, Devi D, Kandimalla R, Kotoky J, Mandal BB. Potential of silk fibroin/chondrocyte constructs of muga silkworm Antheraea assamensis for cartilage tissue engineering. J Mater Chem B 2016; 4:3670-3684. [PMID: 32263306 DOI: 10.1039/c6tb00717a] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Articular cartilage damage represents one of the most perplexing clinical problems of musculoskeletal therapeutics due to its limited self-repair and regenerative capabilities. In this study, 3D porous silk fibroin scaffolds derived from non-mulberry muga silkworm Antheraea assamensis were fabricated and examined for their ability to support cartilage tissue engineering. Additionally, Bombyx mori and Philosamia ricini silk fibroin scaffolds were utilized for comparative studies. Herein, the fabricated scaffolds were thoroughly characterized and compared for cartilaginous tissue formation within the silk fibroin scaffolds seeded with primary porcine chondrocytes and cultured in vitro for 2 weeks. Surface morphology and structural conformation studies revealed the highly interconnected porous structure (pore size 80-150 μm) with enhanced stability within their structure. The fabricated scaffolds demonstrated improved mechanical properties and were followed-up with sequential experiments to reveal improved thermal and degradation properties. Silk fibroin scaffolds of A. assamensis and P. ricini supported better chondrocyte attachment and proliferation as indicated by metabolic activities and fluorescence microscopic studies. Biochemical analysis demonstrated significantly higher production of sulphated glycosaminoglycans (sGAGs) and type II collagen in A. assamensis silk fibroin scaffolds followed by P. ricini and B. mori scaffolds (p < 0.001). Furthermore, histochemistry and immunohistochemical studies indicated enhanced accumulation of sGAGs and expression of collagen II. Moreover, the scaffolds in a subcutaneous model of rat demonstrated in vivo biocompatibility after 8 weeks of implantation. Taken together, these results demonstrate the positive attributes from the non-mulberry silk fibroin scaffold of A. assamensis and suggest its suitability as a promising scaffold for chondrocyte based cartilage repair.
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Affiliation(s)
- Nandana Bhardwaj
- Seri-Biotechnology Unit, Life Science Division, Institute of Advanced Study in Science and Technology, Guwahati-781035, India.
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Saravanan S, Leena RS, Selvamurugan N. Chitosan based biocomposite scaffolds for bone tissue engineering. Int J Biol Macromol 2016; 93:1354-1365. [PMID: 26845481 DOI: 10.1016/j.ijbiomac.2016.01.112] [Citation(s) in RCA: 216] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/27/2016] [Accepted: 01/29/2016] [Indexed: 12/18/2022]
Abstract
The clinical demand for scaffolds and the diversity of available polymers provide freedom in the fabrication of scaffolds to achieve successful progress in bone tissue engineering (BTE). Chitosan (CS) has drawn much of the attention in recent years for its use as graft material either as alone or in a combination with other materials in BTE. The scaffolds should possess a number of properties like porosity, biocompatibility, water retention, protein adsorption, mechanical strength, biomineralization and biodegradability suited for BTE applications. In this review, CS and its properties, and the role of CS along with other polymeric and ceramic materials as scaffolds for bone tissue repair applications are highlighted.
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Affiliation(s)
- S Saravanan
- Department of Biotechnology, School of Bioengineering, SRM University, Kattankulathur, Tamil Nadu, India
| | - R S Leena
- Department of Biotechnology, School of Bioengineering, SRM University, Kattankulathur, Tamil Nadu, India
| | - N Selvamurugan
- Department of Biotechnology, School of Bioengineering, SRM University, Kattankulathur, Tamil Nadu, India.
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25
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Salgado CL, Grenho L, Fernandes MH, Colaço BJ, Monteiro FJ. Biodegradation, biocompatibility, and osteoconduction evaluation of collagen-nanohydroxyapatite cryogels for bone tissue regeneration. J Biomed Mater Res A 2015; 104:57-70. [PMID: 26179958 DOI: 10.1002/jbm.a.35540] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 06/29/2015] [Accepted: 07/07/2015] [Indexed: 01/06/2023]
Abstract
Designing biomimetic biomaterials inspired by the natural complex structure of bone and other hard tissues is still a challenge nowadays. The control of the biomineralization process onto biomaterials should be evaluated before clinical application. Aiming at bone regeneration applications, this work evaluated the in vitro biodegradation and interaction between human bone marrow stromal cells (HBMSC) cultured on different collagen/nanohydroxyapatite cryogels. Cell proliferation, differentiation, morphology, and metabolic activity were assessed through different protocols. All the biocomposite materials allowed physiologic apatite deposition after incubation in simulated body fluid and the cryogel with the highest nanoHA content showed to have the highest mechanical strength (DMA). The study clearly showed that the highest concentration of nanoHA granules on the cryogels were able to support cell type's survival, proliferation, and individual functionality in a monoculture system, for 21 days. In fact, the biocomposites were also able to differentiate HBMSCs into osteoblastic phenotype. The composites behavior was also assessed in vivo through subcutaneous and bone implantation in rats to evaluate its tissue-forming ability and degradation rate. The cryogels Coll/nanoHA (30 : 70) promoted tissue regeneration and adverse reactions were not observed on subcutaneous and bone implants. The results achieved suggest that scaffolds of Coll/nanoHA (30 : 70) should be considered promising implants for bone defects that present a grotto like appearance with a relatively small access but a wider hollow inside. This material could adjust to small dimensions and when entering into the defect, it could expand inside and remain in close contact with the defect walls, thus ensuring adequate osteoconductivity.
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Affiliation(s)
- Christiane Laranjo Salgado
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal.,INEB - Instituto De Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180, Porto, Portugal.,Faculdade De Engenharia, Departamento De Engenharia Metalúrgica e Materiais, Universidade do Porto, Rua Dr. Roberto Frias, S/N 4200-465, Porto, Portugal
| | - Liliana Grenho
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal.,INEB - Instituto De Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180, Porto, Portugal.,Faculdade De Engenharia, Departamento De Engenharia Metalúrgica e Materiais, Universidade do Porto, Rua Dr. Roberto Frias, S/N 4200-465, Porto, Portugal
| | - Maria Helena Fernandes
- Laboratory for Bone Metabolism and Regeneration, Faculdade De Medicina Dentária Da Universidade Do Porto (FMDUP), Rua Dr. Manuel Pereira Da Silva, 4200-393, Porto, Portugal
| | - Bruno Jorge Colaço
- Department of Zootechny, Center for the Study of Animal Sciences (CECA), ECAV, Universidade De Trás-os-Montes E Alto Douro, 5001-801, Vila Real, Portugal
| | - Fernando Jorge Monteiro
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal.,INEB - Instituto De Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180, Porto, Portugal.,Faculdade De Engenharia, Departamento De Engenharia Metalúrgica e Materiais, Universidade do Porto, Rua Dr. Roberto Frias, S/N 4200-465, Porto, Portugal
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26
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Huang W, Li X, Shi X, Lai C. Microsphere based scaffolds for bone regenerative applications. Biomater Sci 2014; 2:1145-1153. [DOI: 10.1039/c4bm00161c] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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27
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PARRILLI A, PAGANI S, MALTARELLO MC, SANTI S, SALERNO A, NETTI PA, GIARDINO R, RIMONDINI L, FINI M. Three-dimensional cellular distribution in polymeric scaffolds for bone regeneration: a microCT analysis compared to SEM, CLSM and DNA content. J Microsc 2014; 255:20-9. [DOI: 10.1111/jmi.12132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 04/03/2014] [Indexed: 11/25/2022]
Affiliation(s)
- A. PARRILLI
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
| | - S. PAGANI
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
- Laboratory of Preclinical and Surgical Studies; Rizzoli Orthopaedic Institute; Bologna Italy
| | - M. C. MALTARELLO
- Laboratory of Muscoskeletal Cell Biology; Rizzoli Orthopaedic Institute; Bologna Italy
- RAMSES Laboratory; Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
| | - S. SANTI
- Laboratory of Muscoskeletal Cell Biology; Rizzoli Orthopaedic Institute; Bologna Italy
- CNR, Institute of Molecular Genetics; Bologna Italy
| | - A. SALERNO
- Interdisciplinary Research Centre of Biomaterials; University of Naples Federico II; Naples Italy
- Institute for Composite and Biomedical Materials; National Research Council; (IMCB-CNR); Naples Italy
| | - P. A. NETTI
- Interdisciplinary Research Centre of Biomaterials; University of Naples Federico II; Naples Italy
- Centre for Advanced Biomaterials for Health Care (CRIB-IIT); Istituto Italiano di Tecnologia; Naples Italy
| | - R. GIARDINO
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
| | - L. RIMONDINI
- Department of Health Sciences; University of Piemonte Orientale “Amedeo Avogadro”; Novara Italy
| | - M. FINI
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
- Laboratory of Preclinical and Surgical Studies; Rizzoli Orthopaedic Institute; Bologna Italy
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28
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Costa-Pinto AR, Martins AM, Castelhano-Carlos MJ, Correlo VM, Sol PC, Longatto-Filho A, Battacharya M, Reis RL, Neves NM. In vitro degradation and in vivo biocompatibility of chitosan–poly(butylene succinate) fiber mesh scaffolds. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514521919] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In tissue engineering, the evaluation of the host response to the biomaterial implantation must be assessed to determine the extent of the inflammatory reaction. We studied the degradation of poly(butylene succinate) and chitosan in vitro using lipase and lysozyme enzymes, respectively. The subcutaneous implantation of the scaffolds was performed to assess tissue response. The type of inflammatory cells present in the surrounding tissue, as well as within the scaffold, was determined histologically and by immunohistochemistry. In the presence of lipase or lysozyme, the water uptake of the scaffolds increased. Based on the weight loss data and scanning electron microscopy analysis, the lysozyme combined with lipase had a notable effect on the in vitro degradation of the scaffolds. The in vivo implantation showed a normal inflammatory response, with presence of neutrophils, in a first stage, and macrophages, lymphocytes, and giant cells in a later stage. Vascularization in the surrounding tissue and within the implant increased with time. Moreover, the collagen deposition increased with time inside the implant. In vivo, the scaffolds maintained the structural integrity. The degradation in vitro was faster and greater compared to that observed in vivo within the same time periods.
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Affiliation(s)
- Ana R Costa-Pinto
- 3B’s Research Group in Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Ana M Martins
- 3B’s Research Group in Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Magda J Castelhano-Carlos
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
- Life and Health Sciences Research Institute (ICVS), Campus de Gualtar, Braga, Portugal
| | - Vitor M Correlo
- 3B’s Research Group in Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Paula C Sol
- 3B’s Research Group in Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Adhemar Longatto-Filho
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
- Life and Health Sciences Research Institute (ICVS), Campus de Gualtar, Braga, Portugal
| | - Mrinal Battacharya
- Department of Biosystems Engineering, University of Minnesota, St Paul, MN, USA
| | - Rui L Reis
- 3B’s Research Group in Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno M Neves
- 3B’s Research Group in Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B’s, PT Government Associate Laboratory, Braga/Guimarães, Portugal
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29
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Susano MA, Leonor IB, Reis RL, Azevedo HS. Elastic biodegradable starch/ethylene-co-vinyl alcohol fibre-mesh scaffolds for tissue engineering applications. J Appl Polym Sci 2014. [DOI: 10.1002/app.40504] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Maria A. Susano
- 3B's Research Group-Biomaterials, Biodegradables, and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas Guimarães Portugal
- ICVS/3Bs-PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Isabel B. Leonor
- 3B's Research Group-Biomaterials, Biodegradables, and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas Guimarães Portugal
- ICVS/3Bs-PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Rui L. Reis
- 3B's Research Group-Biomaterials, Biodegradables, and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas Guimarães Portugal
- ICVS/3Bs-PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Helena S. Azevedo
- 3B's Research Group-Biomaterials, Biodegradables, and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas Guimarães Portugal
- ICVS/3Bs-PT Government Associate Laboratory; Braga/Guimarães Portugal
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30
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Liu X, Zhao K, Gong T, Song J, Bao C, Luo E, Weng J, Zhou S. Delivery of growth factors using a smart porous nanocomposite scaffold to repair a mandibular bone defect. Biomacromolecules 2014; 15:1019-30. [PMID: 24467335 DOI: 10.1021/bm401911p] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Implantation of a porous scaffold with a large volume into the body in a convenient and safe manner is still a challenging task in the repair of bone defects. In this study, we present a porous smart nanocomposite scaffold with a combination of shape memory function and controlled delivery of growth factors. The shape memory function enables the scaffold with a large volume to be deformed into its temporal architecture with a small volume using hot-compression and can subsequently recover its original shape upon exposure to body temperature after it is implanted in the body. The scaffold consists of chemically cross-linked poly(ε-caprolactone) (c-PCL) and hydroxyapatite nanoparticles. The highly interconnected pores of the scaffold were obtained using the sugar leaching method. The shape memory porous scaffold loaded with bone morphogenetic protein-2 (BMP-2) was also fabricated by coating the calcium alginate layer and BMP-2 on the surface of the pore wall. Under both in vitro and in vivo environmental conditions, the porous scaffold displays good shape memory recovery from the compressed shape with deformed pores of 33 μm in diameter to recover its porous shape with original pores of 160 μm in diameter. In vitro cytotoxicity based on the MTT test revealed that the scaffold exhibited good cytocompatibility. The in vivo micro-CT and histomorphometry results demonstrated that the porous scaffold could promote new bone generation in the rabbit mandibular bone defect. Thus, our results indicated that this shape memory porous scaffold demonstrated great potential for application in bone regenerative medicine.
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Affiliation(s)
- Xian Liu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu, Sichuan 610031, People's Republic of China
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31
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Biomimetic Composites Based on Calcium Phosphates and Chitosan - Hyaluronic Acid with Potential Application in Bone Tissue Engineering. ACTA ACUST UNITED AC 2013. [DOI: 10.4028/www.scientific.net/kem.587.191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Composites based on calcium phosphates (CP) and mixtures of biopolymers (chitosan and hyaluronic acid) have been prepared by a biomimetic co-precipitation method and tested as scaffolds for bone tissue engineering. The biomimetic strategy is inspired by natural mineralization processes, where the synthesized minerals are usually combined with proteins, polysaccharides or other mineral forms to form composite, in physiological conditions of temperature and pH. Fourier transformed infrared spectroscopy, scanning electron microscopy, X-ray diffraction and XPS analyses confirmed the porous morphology of the scaffolds and formation of various forms of calcium phosphates with amorphous nature. Thein vitrodegradation studies showed a slow degradation process for CP-biopolymers composites and limited swelling in simulated body fluids. The scaffolds compositions have no negative effect on osteoblasts cell, emphasizing a good biocompatibility.
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32
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Duarte ARC, Santo VE, Alves A, Silva SS, Moreira-Silva J, Silva TH, Marques AP, Sousa RA, Gomes ME, Mano JF, Reis RL. Unleashing the potential of supercritical fluids for polymer processing in tissue engineering and regenerative medicine. J Supercrit Fluids 2013. [DOI: 10.1016/j.supflu.2013.01.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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33
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Biocompatibility, cellular uptake and biodistribution of the polymeric amphiphilic nanoparticles as oral drug carriers. Colloids Surf B Biointerfaces 2013; 103:345-53. [DOI: 10.1016/j.colsurfb.2012.11.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Revised: 11/08/2012] [Accepted: 11/10/2012] [Indexed: 11/23/2022]
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34
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Zhang S, Lin H, Kong S, Wang S, Wang H, Wang H, Armant DR. Physiological and molecular determinants of embryo implantation. Mol Aspects Med 2013; 34:939-80. [PMID: 23290997 DOI: 10.1016/j.mam.2012.12.011] [Citation(s) in RCA: 351] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 12/25/2012] [Accepted: 12/26/2012] [Indexed: 01/19/2023]
Abstract
Embryo implantation involves the intimate interaction between an implantation-competent blastocyst and a receptive uterus, which occurs in a limited time period known as the window of implantation. Emerging evidence shows that defects originating during embryo implantation induce ripple effects with adverse consequences on later gestation events, highlighting the significance of this event for pregnancy success. Although a multitude of cellular events and molecular pathways involved in embryo-uterine crosstalk during implantation have been identified through gene expression studies and genetically engineered mouse models, a comprehensive understanding of the nature of embryo implantation is still missing. This review focuses on recent progress with particular attention to physiological and molecular determinants of blastocyst activation, uterine receptivity, blastocyst attachment and uterine decidualization. A better understanding of underlying mechanisms governing embryo implantation should generate new strategies to rectify implantation failure and improve pregnancy rates in women.
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Affiliation(s)
- Shuang Zhang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China
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35
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Wu C, Zhang M, Zhai D, Yu J, Liu Y, Zhu H, Chang J. Containerless processing for preparation of akermanite bioceramic spheres with homogeneous structure, tailored bioactivity and degradation. J Mater Chem B 2013; 1:1019-1026. [DOI: 10.1039/c2tb00215a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Valente J, Valente T, Alves P, Ferreira P, Silva A, Correia I. Alginate based scaffolds for bone tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.08.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Rodrigues SC, Salgado CL, Sahu A, Garcia MP, Fernandes MH, Monteiro FJ. Preparation and characterization of collagen-nanohydroxyapatite biocomposite scaffolds by cryogelation method for bone tissue engineering applications. J Biomed Mater Res A 2012; 101:1080-94. [PMID: 23008173 DOI: 10.1002/jbm.a.34394] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 06/19/2012] [Accepted: 07/23/2012] [Indexed: 11/09/2022]
Abstract
Recent efforts of bone repair focus on development of porous scaffolds for cell adhesion and proliferation. Collagen-nanohydroxyapatite (HA) scaffolds (70:30; 50:50; and 30:70 mass percentage) were produced by cryogelation technique using 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide as crosslinking agents. A pure collagen scaffold was used as control. Morphology analysis revealed that all cryogels had highly porous structure with interconnective porosity and the nanoHA aggregates were randomly dispersed throughout the scaffold structure. Chemical analysis showed the presence of all major peaks related to collagen and HA in the biocomposites and indicated possible interaction between nanoHA aggregates and collagen molecules. Porosity analysis revealed an enhancement in the surface area as the nanoHA percentage increased in the collagen structure. The biocomposites showed improved mechanical properties as the nanoHA content increased in the scaffold. As expected, the swelling capacity decreased with the increase of nanoHA content. In vitro studies with osteoblasts cells showed that they were able to attach and spread in all cryogels surfaces. The presence of collagen-nanoHA biocomposites resulted in higher overall cellular proliferation compared to pure collagen scaffold. A statistically significant difference between collagen and collagen-nanoHA cryogels was observed after 21 day of cell culture. These innovative collagen-nanoHA cryogels could have potentially appealing application as scaffolds for bone regeneration.
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Affiliation(s)
- Sandra C Rodrigues
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.
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38
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Bulk properties and bioactivity assessment of porous polymethylmethacrylate cement loaded with calcium phosphates under simulated physiological conditions. Acta Biomater 2012; 8:3120-7. [PMID: 22588072 DOI: 10.1016/j.actbio.2012.05.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 05/02/2012] [Accepted: 05/07/2012] [Indexed: 11/21/2022]
Abstract
Polymethylmethacrylate (PMMA) cements are widely used in spinal surgery. Nevertheless, these types of cements present some documented drawbacks. Therefore, efforts have been made to improve the properties and biological performance of solid PMMA. A porous structure would seem to be advantageous for anchoring purposes. This work studied the bulk physicochemical, mechanical and interconnectivity properties of porous PMMA cements loaded with various amounts of calcium phosphate (CaP). As a measure of bioactivity, changes of PMMA cements under simulated physiological conditions were studied in a calcium phosphate solution for 0, 3, 7, 14, 21 and 28 days. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), micro-computed tomography (μ-CT) and mechanical compression tests were performed to characterize the morphology, crystallographic and chemical composition, interconnectivity and mechanical properties, respectively. SEM allowed observing the result of loading CaP into the porous PMMA, which was corroborated by XRD, FTIR and μ-CT. No interference of the CaP with the PMMA was detected. μ-CT described similar interconnectivity and pore distribution for all CaP percentages. Mechanical properties were not significantly altered by the CaP percentages or the immersion time. Hence, porous PMMA was effectively loaded with CaP, which provided the material with properties for potential osteoconductivity.
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39
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Gentile P, Mattioli-Belmonte M, Chiono V, Ferretti C, Baino F, Tonda-Turo C, Vitale-Brovarone C, Pashkuleva I, Reis RL, Ciardelli G. Bioactive glass/polymer composite scaffolds mimicking bone tissue. J Biomed Mater Res A 2012; 100:2654-67. [PMID: 22615261 DOI: 10.1002/jbm.a.34205] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 01/16/2012] [Accepted: 03/30/2012] [Indexed: 12/31/2022]
Abstract
The aim of this work was the preparation and characterization of scaffolds with mechanical and functional properties able to regenerate bone. Porous scaffolds made of chitosan/gelatin (POL) blends containing different amounts of a bioactive glass (CEL2), as inorganic material stimulating biomineralization, were fabricated by freeze-drying. Foams with different compositions (CEL2/POL 0/100; 40/60; 70/30 wt %/wt) were prepared. Samples were crosslinked using genipin (GP) to improve mechanical strength and thermal stability. The scaffolds were characterized in terms of their stability in water, chemical structure, morphology, bioactivity, and mechanical behavior. Moreover, MG63 osteoblast-like cells and periosteal-derived stem cells were used to assess their biocompatibility. CEL2/POL samples showed interconnected pores having an average diameter ranging from 179 ± 5 μm for CEL2/POL 0/100 to 136 ± 5 μm for CEL2/POL 70/30. GP-crosslinking and the increase of CEL2 amount stabilized the composites to water solution (shown by swelling tests). In addition, the SBF soaking experiment showed a good bioactivity of the scaffold with 30 and 70 wt % CEL2. The compressive modulus increased by increasing CEL2 amount up to 2.1 ± 0.1 MPa for CEL2/POL 70/30. Dynamical mechanical analysis has evidenced that composite scaffolds at low frequencies showed an increase of storage and loss modulus with increasing frequency; furthermore, a drop of E' and E″ at 1 Hz was observed, and for higher frequencies both moduli increased again. Cells displayed a good ability to interact with the different tested scaffolds which did not modify cell metabolic activity at the analyzed points. MTT test proved only a slight difference between the two cytotypes analyzed.
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Affiliation(s)
- Piergiorgio Gentile
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
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40
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Alves A, Duarte ARC, Mano JF, Sousa RA, Reis RL. PDLLA enriched with ulvan particles as a novel 3D porous scaffold targeted for bone engineering. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.02.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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41
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García Cruz DM, Salmerón-Sánchez M, Gómez-Ribelles JL. Stirred flow bioreactor modulates chondrocyte growth and extracellular matrix biosynthesis in chitosan scaffolds. J Biomed Mater Res A 2012; 100:2330-41. [DOI: 10.1002/jbm.a.34174] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/15/2012] [Accepted: 03/06/2012] [Indexed: 02/05/2023]
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42
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Luo T, Wu C, Zhang Y. The in vivo osteogenesis of Mg or Zr-modified silicate-based bioceramic spheres. J Biomed Mater Res A 2012; 100:2269-77. [DOI: 10.1002/jbm.a.34161] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 01/30/2012] [Accepted: 03/02/2012] [Indexed: 11/11/2022]
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43
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Stress Analysis of a Class II MO-Restored Tooth Using a 3D CT-Based Finite Element Model. Int J Biomater 2012; 2012:657519. [PMID: 22844287 PMCID: PMC3403473 DOI: 10.1155/2012/657519] [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: 03/15/2012] [Accepted: 05/25/2012] [Indexed: 11/17/2022] Open
Abstract
A computational method has been developed for stress analysis of a restored tooth so that experimental effort can be minimized. The objectives of this study include (i) developing a method to create a 3D FE assembly model for a restored tooth based on CT images and (ii) conducting stress analysis of the restored tooth using the 3D FE model established. To build up a solid computational model of a tooth, a method has been proposed to construct a 3D model from 2D CT-scanned images. Facilitated with CAD tools, the 3D tooth model has been virtually incorporated with a Class II MO restoration. The tooth model is triphasic, including the enamel, dentin, and pulp phases. To mimic the natural constraint on the movement of the tooth model, its corresponding mandible model has also been generated. The relative high maximum principal stress values were computed at the surface under loading and in the marginal region of the interface between the restoration and the tooth phases.
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Lopez-Heredia MA, Sariibrahimoglu K, Yang W, Bohner M, Yamashita D, Kunstar A, van Apeldoorn AA, Bronkhorst EM, Félix Lanao RP, Leeuwenburgh SC, Itatani K, Yang F, Salmon P, Wolke JG, Jansen JA. Influence of the pore generator on the evolution of the mechanical properties and the porosity and interconnectivity of a calcium phosphate cement. Acta Biomater 2012; 8:404-14. [PMID: 21884833 DOI: 10.1016/j.actbio.2011.08.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 07/09/2011] [Accepted: 08/11/2011] [Indexed: 12/25/2022]
Abstract
Porosity and interconnectivity are important properties of calcium phosphate cements (CPCs) and bone-replacement materials. Porosity of CPCs can be achieved by adding polymeric biodegradable pore-generating particles (porogens), which can add porosity to the CPC and can also be used as a drug-delivery system. Porosity affects the mechanical properties of CPCs, and hence is of relevance for clinical application of these cements. The current study focused on the effect of combinations of polymeric mesoporous porogens on the properties of a CPC, such as specific surface area, porosity and interconnectivity and the development of mechanical properties. CPC powder was mixed with different amounts of PLGA porogens of various molecular weights and porogen sizes. The major factors affecting the properties of the CPC were related to the amount of porogen loaded and the porogen size; the molecular weight did not show a significant effect per se. A minimal porogen size of 40 μm in 30 wt.% seems to produce a CPC with mechanical properties, porosity and interconnectivity suitable for clinical applications. The properties studied here, and induced by the porogen and CPC, can be used as a guide to evoke a specific host-response to maintain CPC integrity and to generate an explicit bone ingrowth.
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45
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Martins AM, Kretlow JD, Costa-Pinto AR, Malafaya PB, Fernandes EM, Neves NM, Alves CM, Mikos AG, Kasper FK, Reis RL. Gradual pore formation in natural origin scaffolds throughout subcutaneous implantation. J Biomed Mater Res A 2011; 100:599-612. [PMID: 22213676 DOI: 10.1002/jbm.a.33261] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 07/26/2011] [Accepted: 08/01/2011] [Indexed: 11/08/2022]
Abstract
This study used a rat subcutaneous implantation model to investigate gradual in situ pore formation in a self-regulating degradable chitosan-based material, which comprises lysozyme incorporated into biomimetic calcium phosphate (CaP) coatings at the surface to control the scaffold degradation and subsequent pore formation. Specifically, the in vivo degradation of the scaffolds, the in situ pore formation, and the tissue response were investigated. Chitosan or chitosan/starch scaffolds were studied with and without a CaP coating in the presence or absence of lysozyme for a total of six experimental groups. Twenty-four scaffolds per group were implanted, and eight scaffolds were retrieved at each of three time points (3, 6, and 12 weeks). Harvested samples were analyzed for weight loss, microcomputed tomography, and histological analysis. All scaffolds showed pronounced weight loss and pore formation as a function of time. The highest weight loss was 29.8% ± 1.5%, obtained at week 12 for CaP chitosan/starch scaffolds with lysozyme incorporated. Moreover, all experimental groups showed a significant increase in porosity after 12 weeks. At all time points no adverse tissue reaction was observed, and as degradation increased, histological analysis showed cellular ingrowth throughout the implants. Using this innovative methodology, the ability to gradually generate pores in situ was clearly demonstrated in vivo.
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Affiliation(s)
- Ana M Martins
- Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Taipas, Guimarães 4806-909, Portugal
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46
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Brun F, Turco G, Accardo A, Paoletti S. Automated quantitative characterization of alginate/hydroxyapatite bone tissue engineering scaffolds by means of micro-CT image analysis. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:2617-2629. [PMID: 21928128 DOI: 10.1007/s10856-011-4447-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 06/13/2011] [Indexed: 05/31/2023]
Abstract
Accurate image acquisition techniques and analysis protocols for a reliable characterization of tissue engineering scaffolds are yet to be well defined. To this aim, the most promising imaging technique seems to be the X-ray computed microtomography (μ-CT). However critical issues of the analysis process deal with the representativeness of the selected Volume of Interest (VOI) and, most significantly, its segmentation. This article presents an image analysis protocol that computes a set of quantitative descriptors suitable for characterizing the morphology and the micro-architecture of alginate/hydroxyapatite bone tissue engineering scaffolds. Considering different VOIs extracted from different μ-CT datasets, an automated segmentation technique is suggested and compared against a manual segmentation. Variable sizes of VOIs are also considered in order to assess their representativeness. The resulting image analysis protocol is reproducible, parameter-free and it automatically provides accurate quantitative information in addition to the simple qualitative observation of the acquired images.
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Affiliation(s)
- Francesco Brun
- Department of Industrial Engineering and Information Technology, University of Trieste, Trieste, Italy.
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47
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Tyson T, Målberg S, Wåtz V, Finne-Wistrand A, Albertsson AC. Functional and Highly Porous Scaffolds for Biomedical Applications. Macromol Biosci 2011; 11:1432-42. [DOI: 10.1002/mabi.201100166] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 06/02/2011] [Indexed: 11/08/2022]
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48
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Wu C, Fan W, Gelinsky M, Xiao Y, Chang J, Friis T, Cuniberti G. In situ preparation and protein delivery of silicate-alginate composite microspheres with core-shell structure. J R Soc Interface 2011; 8:1804-14. [PMID: 21613289 DOI: 10.1098/rsif.2011.0201] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The efficient loading and sustained release of proteins from bioactive microspheres remain a significant challenge. In this study, we have developed bioactive microspheres which can be loaded with protein and then have a controlled rate of protein release into a surrounding medium. This was achieved by preparing a bioactive microsphere system with core-shell structure, combining a calcium silicate (CS) shell with an alginate (A) core by a one-step in situ method. The result was to improve the microspheres' protein adsorption and release, which yielded a highly bioactive material with potential uses in bone repair applications. The composition and the core-shell structure, as well as the formation mechanism of the obtained CS-A microspheres, were investigated by X-ray diffraction, optical microscopy, scanning electron microscopy, energy dispersive spectrometer dot and line-scanning analysis. The protein loading efficiency reached 75 per cent in CS-A microspheres with a core-shell structure by the in situ method. This is significantly higher than that of pure A or CS-A microspheres prepared by non-in situ method, which lack a core-shell structure. CS-A microspheres with a core-shell structure showed a significant decrease in the burst release of proteins, maintaining sustained release profile in phosphate-buffered saline (PBS) at both pH 7.4 and 4.3, compared with the controls. The protein release from CS-A microspheres is predominantly controlled by a Fickian diffusion mechanism. The CS-A microspheres with a core-shell structure were shown to have improved apatite-mineralization in simulated body fluids compared with the controls, most probably owing to the existence of bioactive CS shell on the surface of the microspheres. Our results indicate that the core-shell structure of CS-A microspheres play an important role in enhancing protein delivery and mineralization, which makes these composite materials promising candidates for application in bone tissue regeneration.
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Affiliation(s)
- Chengtie Wu
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, Germany.
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49
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Oliveira MB, Mano JF. Polymer-based microparticles in tissue engineering and regenerative medicine. Biotechnol Prog 2011; 27:897-912. [PMID: 21584949 DOI: 10.1002/btpr.618] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 03/21/2011] [Indexed: 12/11/2022]
Abstract
Different types of biomaterials, processed into different shapes, have been proposed as temporary support for cells in tissue engineering (TE) strategies. The manufacturing methods used in the production of particles in drug delivery strategies have been adapted for the development of microparticles in the fields of TE and regenerative medicine (RM). Microparticles have been applied as building blocks and matrices for the delivery of soluble factors, aiming for the construction of TE scaffolds, either by fusion giving rise to porous scaffolds or as injectable systems for in situ scaffold formation, avoiding complicated surgery procedures. More recently, organ printing strategies have been developed by the fusion of hydrogel particles with encapsulated cells, aiming the production of organs in in vitro conditions. Mesoscale self-assembly of hydrogel microblocks and the use of leachable particles in three-dimensional (3D) layer-by-layer (LbL) techniques have been suggested as well in recent works. Along with innovative applications, new perspectives are open for the use of these versatile structures, and different directions can still be followed to use all the potential that such systems can bring. This review focuses on polymeric microparticle processing techniques and overviews several examples and general concepts related to the use of these systems in TE and RE applications. The use of materials in the development of microparticles from research to clinical applications is also discussed.
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Affiliation(s)
- Mariana B Oliveira
- 3Bs Research Group-Biomaterials, Biodegradables and Biomimetics, University of Minho, AvePark, Zona Industrial da Gandra, S. Cláudio do Barco, Caldas das Taipas, Guimarães 4806-909, Portugal
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50
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Yang TL. Chitin-based materials in tissue engineering: applications in soft tissue and epithelial organ. Int J Mol Sci 2011; 12:1936-63. [PMID: 21673932 PMCID: PMC3111643 DOI: 10.3390/ijms12031936] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 03/07/2011] [Accepted: 03/08/2011] [Indexed: 01/15/2023] Open
Abstract
Chitin-based materials and their derivatives are receiving increased attention in tissue engineering because of their unique and appealing biological properties. In this review, we summarize the biomedical potential of chitin-based materials, specifically focusing on chitosan, in tissue engineering approaches for epithelial and soft tissues. Both types of tissues play an important role in supporting anatomical structures and physiological functions. Because of the attractive features of chitin-based materials, many characteristics beneficial to tissue regeneration including the preservation of cellular phenotype, binding and enhancement of bioactive factors, control of gene expression, and synthesis and deposition of tissue-specific extracellular matrix are well-regulated by chitin-based scaffolds. These scaffolds can be used in repairing body surface linings, reconstructing tissue structures, regenerating connective tissue, and supporting nerve and vascular growth and connection. The novel use of these scaffolds in promoting the regeneration of various tissues originating from the epithelium and soft tissue demonstrates that these chitin-based materials have versatile properties and functionality and serve as promising substrates for a great number of future applications.
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Affiliation(s)
- Tsung-Lin Yang
- Department of Otolaryngology, National Taiwan University Hospital and College of Medicine, Taipei, 100, Taiwan; E-Mail: ; Tel.: +886-2-23123456 ext. 63526
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