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Konig IFM, Chaves Reis A, Braga MA, De Sousa Melo D, Aparecida Oliveira E, Maria Seles Dorneles E, Thomasi SS, Neodini Remedio R, Marcussi S. Comparative toxicological evaluation of carvacrol, acetylcarvacrol anda fipronil-based pesticide in human blood cells. Drug Chem Toxicol 2024; 47:203-212. [PMID: 36541066 DOI: 10.1080/01480545.2022.2159428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/27/2022] [Accepted: 12/11/2022] [Indexed: 12/24/2022]
Abstract
Plant-derived chemicals are promising substances to control arthropod pests, although synthetic ones are still the most frequently used. Thus, comparative toxicological studies are needed to determine if natural substances are safe alternatives to replace the use of synthetic chemicals. This study aimed to compare the toxicity of carvacrol (natural origin), acetylcarvacrol (semi-synthetic) and a fipronil-based pesticide (synthetic). We assessed the effects of these chemicals on hemolytic activity, erythrocytes morphology and leucocyte viability using whole blood from human subjects. Additionally, DNA damage was evaluated through comet and DNA fragmentation assays. Fipronil and carvacrol caused hemolysis at concentrations ranging from 0.5 to 2.0%, whereas acetylcarvacrol did not cause hemolysis at 0.5 and 0.75%. Fipronil and carvacrol caused severe alterations in erythrocytes' morphology at 2%, such as ghost erythrocytes, elliptocyte-like shape and rouleau-like shape, presenting only 3.3 and 8.3% normal cells, respectively, at this concentration. However, 73.3% erythrocytes incubated with 2% acetylcarvacrol exhibited normal morphology. Fipronil considerably reduced leucocytes viability, decreasing it to 78% at 2%. Carvacrol and acetylcarvacrol showed no differences in leucocyte viability for 0.5 to 1.0%, but a decrease was observed for 2% carvacrol. The comet assay showed similar DNA damage for fipronil and carvacrol, but it was significantly lower for 1 and 2% acetylcarvacrol. Incubation with genomic DNA showed that only fipronil caused fragmentation of this molecule. Thus, we conclude that carvacrol and fipronil can present similar toxicity at higher concentrations. However, acetylation of carvacrol significantly reduced its toxicity to human blood cells compared with the other chemicals.
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Affiliation(s)
| | - Aline Chaves Reis
- Department of Medicine, Federal University of Lavras, Lavras, Brazil
| | | | | | | | | | | | | | - Silvana Marcussi
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil
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2
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Eldeeb AE, Salah S, Elkasabgy NA. Biomaterials for Tissue Engineering Applications and Current Updates in the Field: A Comprehensive Review. AAPS PharmSciTech 2022; 23:267. [PMID: 36163568 PMCID: PMC9512992 DOI: 10.1208/s12249-022-02419-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 09/09/2022] [Indexed: 01/10/2023] Open
Abstract
Tissue engineering has emerged as an interesting field nowadays; it focuses on accelerating the auto-healing mechanism of tissues rather than organ transplantation. It involves implanting an In Vitro cultured initiative tissue or a scaffold loaded with tissue regenerating ingredients at the damaged area. Both techniques are based on the use of biodegradable, biocompatible polymers as scaffolding materials which are either derived from natural (e.g. alginates, celluloses, and zein) or synthetic sources (e.g. PLGA, PCL, and PLA). This review discusses in detail the recent applications of different biomaterials in tissue engineering highlighting the targeted tissues besides the in vitro and in vivo key findings. As well, smart biomaterials (e.g. chitosan) are fascinating candidates in the field as they are capable of elucidating a chemical or physical transformation as response to external stimuli (e.g. temperature, pH, magnetic or electric fields). Recent trends in tissue engineering are summarized in this review highlighting the use of stem cells, 3D printing techniques, and the most recent 4D printing approach which relies on the use of smart biomaterials to produce a dynamic scaffold resembling the natural tissue. Furthermore, the application of advanced tissue engineering techniques provides hope for the researchers to recognize COVID-19/host interaction, also, it presents a promising solution to rejuvenate the destroyed lung tissues.
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Affiliation(s)
- Alaa Emad Eldeeb
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt.
| | - Salwa Salah
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt
| | - Nermeen A Elkasabgy
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, Cairo, 11562, Egypt
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A Comparative Review of Natural and Synthetic Biopolymer Composite Scaffolds. Polymers (Basel) 2021; 13:polym13071105. [PMID: 33808492 PMCID: PMC8037451 DOI: 10.3390/polym13071105] [Citation(s) in RCA: 301] [Impact Index Per Article: 100.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 12/12/2022] Open
Abstract
Tissue engineering (TE) and regenerative medicine integrate information and technology from various fields to restore/replace tissues and damaged organs for medical treatments. To achieve this, scaffolds act as delivery vectors or as cellular systems for drugs and cells; thereby, cellular material is able to colonize host cells sufficiently to meet up the requirements of regeneration and repair. This process is multi-stage and requires the development of various components to create the desired neo-tissue or organ. In several current TE strategies, biomaterials are essential components. While several polymers are established for their use as biomaterials, careful consideration of the cellular environment and interactions needed is required in selecting a polymer for a given application. Depending on this, scaffold materials can be of natural or synthetic origin, degradable or nondegradable. In this review, an overview of various natural and synthetic polymers and their possible composite scaffolds with their physicochemical properties including biocompatibility, biodegradability, morphology, mechanical strength, pore size, and porosity are discussed. The scaffolds fabrication techniques and a few commercially available biopolymers are also tabulated.
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Xu W, Zhao R, Wu T, Li G, Wei K, Wang L. Biodegradable calcium carbonate/mesoporous silica/poly(lactic-glycolic acid) microspheres scaffolds with osteogenesis ability for bone regeneration. RSC Adv 2021; 11:5055-5064. [PMID: 35424439 PMCID: PMC8694637 DOI: 10.1039/d0ra09958a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/18/2021] [Indexed: 11/21/2022] Open
Abstract
Sintered microsphere-based scaffolds provide a porous structure and high-resolution spatial organization control, show great potential for bone regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA). However, acidic monomer regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA). However, acidic monomers generated by PLGA degradation tend to cause tissue inflammation, which is the central issue of PLGA-based bone regeneration scaffolds development. In this work, calcium carbonate (CC)/hexagonal mesoporous silica (HMS)/PLGA sintered microsphere-based scaffolds were developed. The scaffolds possessed a three-dimensional (3D) network structure and 30–40% porosity. The degradation results indicated that CC/HMS/PLGA scaffolds could compensate for pH increased caused by PLGA acidic byproducts effectively. Degradation results showed that CC/HMS/PLGA scaffold could effectively compensate for the pH increase caused by PLGA acidic by-products. Composite CC additives can induce the increase of adhesive proteins in the environment, which is conducive to the adhesion of cells to scaffolds. Mesenchymal stem cells (MSCs) proliferation and osteogenic differentiation were evaluated by CCK-8 assay, alkaline phosphatase (ALP) activity, ALP staining, and Alizarin Red staining. The results showed that compared with HMS/PLGA scaffolds, the proliferation of MSCs cultured with CC/HMS/PLGA scaffolds was enhanced. When cultured on the CC/HMS/PLGA scaffolds, MSCs also showed significantly enhanced ALP activity and higher calcium secretion compared with the HMS/PLGA scaffolds. CC/HMS/PLGA sintered microsphere-based scaffolds provides an attractive strategy for bone repair and regeneration with better performance. Sintered microsphere-based scaffolds provide a porous structure and high-resolution spatial organization control, show great potential for bone regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA).![]()
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Affiliation(s)
- Weikang Xu
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80.,Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute), Guangdong Academy of Sciences Jianghai Avenue Central, Haizhu District Guangzhou Guangdong 510316 China.,National Engineering Research Center for Human Tissue Restoration and Function Reconstruction, South China University of Technology Wushan Road 381 Guangzhou Guangdong 510006 China +86-757-39-38-00-98
| | - Ruifang Zhao
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Tingting Wu
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Guixiang Li
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Kun Wei
- National Engineering Research Center for Human Tissue Restoration and Function Reconstruction, South China University of Technology Wushan Road 381 Guangzhou Guangdong 510006 China +86-757-39-38-00-98
| | - Liyan Wang
- Department of Stomatology, Foshan Woman and Children's Hospital No. 11 Renmin Xi Road, Chancheng District Foshan Guangdong 528000 China +86-757-82-96-97-89
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Bharadwaz A, Jayasuriya AC. Recent trends in the application of widely used natural and synthetic polymer nanocomposites in bone tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110698. [PMID: 32204012 DOI: 10.1016/j.msec.2020.110698] [Citation(s) in RCA: 288] [Impact Index Per Article: 72.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 01/02/2020] [Accepted: 01/25/2020] [Indexed: 12/16/2022]
Abstract
The goal of a biomaterial is to support the bone tissue regeneration process at the defect site and eventually degrade in situ and get replaced with the newly generated bone tissue. Nanocomposite biomaterials are a relatively new class of materials that incorporate a biopolymeric and biodegradable matrix structure with bioactive and easily resorbable fillers which are nano-sized. This article is a review of a few polymeric nanocomposite biomaterials which are potential candidates for bone tissue regeneration. These nanocomposites have been broadly classified into two groups viz. natural and synthetic polymer based. Natural polymer-based nanocomposites include materials fabricated through reinforcement of nanoparticles and/or nanofibers in a natural polymer matrix. Several widely used natural biopolymers, such as chitosan (CS), collagen (Col), cellulose, silk fibroin (SF), alginate, and fucoidan, have been reviewed regarding their present investigation on the incorporation of nanomaterial, biocompatibility, and tissue regeneration. Synthetic polymer-based nanocomposites that have been covered in this review include polycaprolactone (PCL), poly (lactic-co-glycolic) acid (PLGA), polyethylene glycol (PEG), poly (lactic acid) (PLA), and polyurethane (PU) based nanocomposites. An array of nanofillers, such as nano hydroxyapatite (nHA), nano zirconia (nZr), nano silica (nSi), silver nano particles (AgNPs), nano titanium dioxide (nTiO2), graphene oxide (GO), that is used widely across the bone tissue regeneration research platform are included in this review with respect to their incorporation into a natural and/or synthetic polymer matrix. The influence of nanofillers on cell viability, both in vitro and in vivo, along with cytocompatibility and new tissue generation has been encompassed in this review. Moreover, nanocomposite material characterization using some commonly used analytical techniques, such as electron microscopy, spectroscopy, diffraction patterns etc., has been highlighted in this review. Biomaterial physical properties, such as pore size, porosity, particle size, and mechanical strength which strongly influences cell attachment, proliferation, and subsequent tissue growth has been covered in this review. This review has been sculptured around a case by case basis of current research that is being undertaken in the field of bone regeneration engineering. The nanofillers induced into the polymeric matrix render important properties, such as large surface area, improved mechanical strength as well as stability, improved cell adhesion, proliferation, and cell differentiation. The selection of nanocomposites is thus crucial in the analysis of viable treatment strategies for bone tissue regeneration for specific bone defects such as craniofacial defects. The effects of growth factor incorporation on the nanocomposite for controlling new bone generation are also important during the biomaterial design phase.
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Affiliation(s)
- Angshuman Bharadwaz
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH, USA
| | - Ambalangodage C Jayasuriya
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH, USA; Department of Orthopaedic Surgery, College of Medicine and Life Sciences, The University of Toledo, Toledo, OH, USA.
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6
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Zare EN, Jamaledin R, Naserzadeh P, Afjeh-Dana E, Ashtari B, Hosseinzadeh M, Vecchione R, Wu A, Tay FR, Borzacchiello A, Makvandi P. Metal-Based Nanostructures/PLGA Nanocomposites: Antimicrobial Activity, Cytotoxicity, and Their Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:3279-3300. [PMID: 31873003 DOI: 10.1021/acsami.9b19435] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Among the different synthetic polymers developed for biomedical applications, poly(lactic-co-glycolic acid) (PLGA) has attracted considerable attention because of its excellent biocompatibility and biodegradability. Nanocomposites based on PLGA and metal-based nanostructures (MNSs) have been employed extensively as an efficient strategy to improve the structural and functional properties of PLGA polymer. The MNSs have been used to impart new properties to PLGA, such as antimicrobial properties and labeling. In the present review, the different strategies available for the fabrication of MNS/PLGA nanocomposites and their applications in the biomedical field will be discussed, beginning with a description of the preparation routes, antimicrobial activity, and cytotoxicity concerns of MNS/PLGA nanocomposites. The biomedical applications of these nanocomposites, such as carriers and scaffolds in tissue regeneration and other therapies are subsequently reviewed. In addition, the potential advantages of using MNS/PLGA nanocomposites in treatment illnesses are analyzed based on in vitro and in vivo studies, to support the potential of these nanocomposites in future research in the biomedical field.
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Affiliation(s)
| | - Rezvan Jamaledin
- Center for Advanced Biomaterials for Health Care , Istituto Italiano di Tecnologia , Naples 80125 , Italy
- Department of Chemical, Materials and Industrial Production Engineering , University of Naples Federico II , Naples 80125 , Italy
| | - Parvaneh Naserzadeh
- Shahdad Ronak Commercialization Company (SPE No 10320821698) , Pasdaran Street , Tehran 1947 , Iran
- Nanomedicine and Tissue Engineering Research Center , Shahid Beheshti University of Medical Sciences , Tehran 1985717443 , Iran
| | - Elham Afjeh-Dana
- Shahdad Ronak Commercialization Company (SPE No 10320821698) , Pasdaran Street , Tehran 1947 , Iran
- Radiation Biology Research Center , Iran University of Medical Sciences , Tehran 14496-14535 , Iran
| | - Behnaz Ashtari
- Radiation Biology Research Center , Iran University of Medical Sciences , Tehran 14496-14535 , Iran
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine , Iran University of Medical Sciences , Tehran 14496-14535 , Iran
| | - Mehdi Hosseinzadeh
- Health Management and Economics Research Center , Iran University of Medical Sciences , Tehran 14496-14535 , Iran
- Computer Science , University of Human Development , Sulaymaniyah , Iraq
| | - Raffaele Vecchione
- Center for Advanced Biomaterials for Health Care , Istituto Italiano di Tecnologia , Naples 80125 , Italy
| | - Aimin Wu
- Department of Orthopedics, Bioprinting Research Group, Zhejiang Provincial Key Laboratory of Orthopedics , The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University , Wenzhou 325035 , China
| | - Franklin R Tay
- College of Graduate Studies , Augusta University , Augusta , Georgia 30912 , United States
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology , The Fourth Military Medical University , Xi'an , Shaanxi , China
| | - Assunta Borzacchiello
- Institute for Polymers, Composites, and Biomaterials (IPCB) , National Research Council (CNR) , Naples 80125 , Italy
| | - Pooyan Makvandi
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine , Iran University of Medical Sciences , Tehran 14496-14535 , Iran
- Institute for Polymers, Composites, and Biomaterials (IPCB) , National Research Council (CNR) , Naples 80125 , Italy
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Rasoulianboroujeni M, Fahimipour F, Shah P, Khoshroo K, Tahriri M, Eslami H, Yadegari A, Dashtimoghadam E, Tayebi L. Development of 3D-printed PLGA/TiO 2 nanocomposite scaffolds for bone tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 96:105-113. [PMID: 30606516 PMCID: PMC6388694 DOI: 10.1016/j.msec.2018.10.077] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 09/01/2018] [Accepted: 10/22/2018] [Indexed: 01/20/2023]
Abstract
Porous scaffolds were 3D-printed using poly lactic-co-glycolic acid (PLGA)/TiO2 composite (10:1 weight ratio) for bone tissue engineering applications. Addition of TiO2 nanoparticles improved the compressive modulus of scaffolds. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) revealed an increase in both glass transition temperature and thermal decomposition onset of the composite compared to pure PLGA. Furthermore, addition of TiO2 was found to enhance the wettability of the surface evidenced by reducing the contact angle from 90.5 ± 3.2 to 79.8 ± 2.4 which is in favor of cellular attachment and activity. The obtained results revealed that PLGA/TiO2 scaffolds significantly improved osteoblast proliferation compared to pure PLGA (p < 0.05). Furthermore, osteoblasts cultured on PLGA/TiO2 nanocomposite showed significantly higher ALP activity and improved calcium secretion compared to pure PLGA scaffolds (p < 0.05).
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Affiliation(s)
| | - F Fahimipour
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - P Shah
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - K Khoshroo
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - M Tahriri
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - H Eslami
- Department of Biomedical Engineering, Haeri University, Yazd, Iran
| | - A Yadegari
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - E Dashtimoghadam
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - L Tayebi
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA.
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8
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Gupta V, Khan Y, Berkland CJ, Laurencin CT, Detamore MS. Microsphere-Based Scaffolds in Regenerative Engineering. Annu Rev Biomed Eng 2018. [PMID: 28633566 DOI: 10.1146/annurev-bioeng-071516-044712] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Microspheres have long been used in drug delivery applications because of their controlled release capabilities. They have increasingly served as the fundamental building block for fabricating scaffolds for regenerative engineering because of their ability to provide a porous network, offer high-resolution control over spatial organization, and deliver growth factors/drugs and/or nanophase materials. Because they provide physicochemical gradients via spatiotemporal release of bioactive factors and nanophase ceramics, microspheres are a desirable tool for engineering complex tissues and biological interfaces. In this review we describe various methods for microsphere fabrication and sintering, and elucidate how these methods influence both micro- and macroscopic scaffold properties, with a special focus on the nature of sintering. Furthermore, we review key applications of microsphere-based scaffolds in regenerating various tissues. We hope to inspire researchers to join a growing community of investigators using microspheres as tissue engineering scaffolds so that their full potential in regenerative engineering may be realized.
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Affiliation(s)
- Vineet Gupta
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66045;
| | - Yusuf Khan
- Department of Orthopaedic Surgery, University of Connecticut Health Campus, Farmington, Connecticut 06030; , .,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269.,Institute for Regenerative Engineering, University of Connecticut Health Campus, Farmington, Connecticut 06030
| | - Cory J Berkland
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66045; .,Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045;
| | - Cato T Laurencin
- Department of Orthopaedic Surgery, University of Connecticut Health Campus, Farmington, Connecticut 06030; , .,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269.,Institute for Regenerative Engineering, University of Connecticut Health Campus, Farmington, Connecticut 06030
| | - Michael S Detamore
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019;
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Castillo-Dalí G, Castillo-Oyagüe R, Batista-Cruzado A, López-Santos C, Rodríguez-González-Elipe A, Saffar JL, Lynch CD, Gutiérrez-Pérez JL, Torres-Lagares D. Reliability of new poly (lactic-co-glycolic acid) membranes treated with oxygen plasma plus silicon dioxide layers for pre-prosthetic guided bone regeneration processes. Med Oral Patol Oral Cir Bucal 2017; 22:e242-e250. [PMID: 28160588 PMCID: PMC5359707 DOI: 10.4317/medoral.21512] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 11/03/2016] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The use of cold plasmas may improve the surface roughness of poly(lactic-co-glycolic) acid (PLGA) membranes, which may stimulate the adhesion of osteogenic mediators and cells, thus accelerating the biodegradation of the barriers. Moreover, the incorporation of metallic-oxide particles to the surface of these membranes may enhance their osteoinductive capacity. Therefore, the aim of this paper was to evaluate the reliability of a new PLGA membrane after being treated with oxygen plasma (PO2) plus silicon dioxide (SiO2) layers for guided bone regeneration (GBR) processes. MATERIAL AND METHODS Circumferential bone defects (diameter: 11 mm; depth: 3 mm) were created on the top of eight experimentation rabbits' skulls and were randomly covered with: (1) PLGA membranes (control), or (2) PLGA/PO2/SiO2 barriers. The animals were euthanized two months afterwards. A micromorphologic study was then performed using ROI (region of interest) colour analysis. Percentage of new bone formation, length of mineralised bone, concentration of osteoclasts, and intensity of ostheosynthetic activity were assessed and compared with those of the original bone tissue. The Kruskal-Wallis test was applied for between-group com Asignificance level of a=0.05 was considered. RESULTS The PLGA/PO2/SiO2 membranes achieved the significantly highest new bone formation, length of mineralised bone, concentration of osteoclasts, and ostheosynthetic activity. The percentage of regenerated bone supplied by the new membranes was similar to that of the original bone tissue. Unlike what happened in the control group, PLGA/PO2/SiO2 membranes predominantly showed bone layers in advanced stages of formation. CONCLUSIONS The addition of SiO2 layers to PLGA membranes pre-treated with PO2 improves their bone-regeneration potential. Although further research is necessary to corroborate these conclusions in humans, this could be a promising strategy to rebuild the bone architecture prior to rehabilitate edentulous areas.
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Affiliation(s)
- G Castillo-Dalí
- Department of Buccofacial Prostheses, Faculty of Dentistry, Complutense University of Madrid UCM, Pza. Ramón y Cajal, s/n, E-28040, Madrid, Spain,
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Serra-Gómez R, Dreiss CA, González-Benito J, González-Gaitano G. Structure and Rheology of Poloxamine T1107 and Its Nanocomposite Hydrogels with Cyclodextrin-Modified Barium Titanate Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6398-6408. [PMID: 27245639 DOI: 10.1021/acs.langmuir.6b01544] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the preparation of a nanocomposite hydrogel based on a poloxamine gel matrix (Tetronic T1107) and cyclodextrin (CD)-modified barium titanate (BT) nanoparticles. The micellization and sol-gel behavior of pH-responsive block copolymer T1107 were fully characterized by small-angle neutron scattering (SANS), dynamic light scattering (DLS), and Fourier transform infrared attenuated total reflectance (FTIR-ATR) spectroscopy as a function of concentration, pH and temperature. SANS results reveal that spherical micelles in the low concentration regime present a dehydrated core and highly hydrated shell, with a small aggregation number and size, highly dependent on the degree of protonation of the central amine spacer. At high concentration, T1107 undergoes a sol-gel transition, which is inhibited at acidic pH. Nanocomposites were prepared by incorporating CD-modified BT of two different sizes (50 and 200 nm) in concentrated polymer solutions. Rheological measurements show a broadening of the gel region, as well as an improvement of the mechanical properties, as assessed by the shear elastic modulus, G' (up to 200% increase). Initial cytocompatibility studies of the nanocomposites show that the materials are nontoxic with viabilities over 70% for NIH3T3 fibroblast cell lines. Overall, the combination of Tetronics and modified BaTiO3 provides easily customizable systems with promising applications as soft piezoelectric materials.
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Affiliation(s)
| | - Cécile A Dreiss
- Institute of Pharmaceutical Science, King's College London , Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Javier González-Benito
- Department of Materials Science and Engineering, IQMAAB, Universidad Carlos III de Madrid , 28911 Leganés, Spain
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11
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Fried ES, Luchan J, Gilchrist ML. Biodegradable, Tethered Lipid Bilayer-Microsphere Systems with Membrane-Integrated α-Helical Peptide Anchors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3470-5. [PMID: 26972467 PMCID: PMC4911039 DOI: 10.1021/acs.langmuir.6b00008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Supported lipid bilayers (SLBs) are ideally suited for the study of biomembrane-biomembrane interactions and for the biomimicry of cell-to-cell communication, allowing for surface ligand displays that contain laterally mobile elements. However, the SLB paradigm does not include three-dimensionality and biocompatibility. As a way to bypass these limitations, we have developed a biodegradable form of microsphere SLBs, also known as proteolipobeads (PLBs), using PLGA microspheres. Microspheres were synthesized using solvent evaporation and size selected with fluorescence activated cell sorting (FACS). Biomembranes were covalently tethered upon fusion to microsphere supports via short-chain PEG spacers connecting membrane-integrated α-helical peptides and the microsphere surface, affecting membrane diffusivity and mobility as indicated by confocal FRAP analysis. Membrane heterogeneities, which are attributed to PLGA hydrophobicity and rough surface topography, are curtailed by the addition of PEG tethers. This method allows for the presentation of tethered, laterally mobile biomembranes in three dimensions with functionally embedded attachment peptides for mobile ligand displays.
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Affiliation(s)
- Eric S. Fried
- Department of Chemical Engineering, The City College of the City University of New York, 140th Street and Convent Avenue, New York, New York 10031, United States
| | - Joshua Luchan
- Department of Biomedical Engineering, The City College of the City University of New York, 140th Street and Convent Avenue, New York, New York 10031, United States
| | - M. Lane Gilchrist
- Department of Chemical Engineering, The City College of the City University of New York, 140th Street and Convent Avenue, New York, New York 10031, United States
- Department of Biomedical Engineering, The City College of the City University of New York, 140th Street and Convent Avenue, New York, New York 10031, United States
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