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Fan MH, Pi JK, Zou CY, Jiang YL, Li QJ, Zhang XZ, Xing F, Nie R, Han C, Xie HQ. Hydrogel-exosome system in tissue engineering: A promising therapeutic strategy. Bioact Mater 2024; 38:1-30. [PMID: 38699243 PMCID: PMC11061651 DOI: 10.1016/j.bioactmat.2024.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/24/2024] [Accepted: 04/08/2024] [Indexed: 05/05/2024] Open
Abstract
Characterized by their pivotal roles in cell-to-cell communication, cell proliferation, and immune regulation during tissue repair, exosomes have emerged as a promising avenue for "cell-free therapy" in clinical applications. Hydrogels, possessing commendable biocompatibility, degradability, adjustability, and physical properties akin to biological tissues, have also found extensive utility in tissue engineering and regenerative repair. The synergistic combination of exosomes and hydrogels holds the potential not only to enhance the efficiency of exosomes but also to collaboratively advance the tissue repair process. This review has summarized the advancements made over the past decade in the research of hydrogel-exosome systems for regenerating various tissues including skin, bone, cartilage, nerves and tendons, with a focus on the methods for encapsulating and releasing exosomes within the hydrogels. It has also critically examined the gaps and limitations in current research, whilst proposed future directions and potential applications of this innovative approach.
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Affiliation(s)
- Ming-Hui Fan
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Jin-Kui Pi
- Core Facilities, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Chen-Yu Zou
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Yan-Lin Jiang
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Qian-Jin Li
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Xiu-Zhen Zhang
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Fei Xing
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Rong Nie
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Chen Han
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Hui-Qi Xie
- Department of Orthopedic Surgery and Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
- Frontier Medical Center, Tianfu Jincheng Laboratory, Chengdu, Sichuan, 610212, PR China
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Raja IS, Kim B, Han DW. Nanofibrous Material-Reinforced Printable Ink for Enhanced Cell Proliferation and Tissue Regeneration. Bioengineering (Basel) 2024; 11:363. [PMID: 38671784 PMCID: PMC11047974 DOI: 10.3390/bioengineering11040363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/05/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
The three-dimensional (3D) printing of biomaterials, cells, and bioactive components, including growth factors, has gained interest among researchers in the field of tissue engineering (TE) with the aim of developing many scaffolds to sustain size, shape fidelity, and structure and retain viable cells inside a network. The biocompatible hydrogel employed in 3D printing should be soft enough to accommodate cell survival. At the same time, the gel should be mechanically strong to avoid the leakage of cells into the surrounding medium. Considering these basic criteria, researchers have developed nanocomposite-based printable inks with suitable mechanical and electroconductive properties. These nanomaterials, including carbon family nanomaterials, transition metal dichalcogenides, and polymeric nanoparticles, act as nanofillers and dissipate stress across polymeric networks through their electroactive interactions. Nanofiber-reinforced printable ink is one kind of nanocomposite-based ink that comprises dispersed nanofiber components in a hydrogel matrix. In this current review, we compile various TE applications of nanofiber-reinforced printable ink and describe the 3D-printing parameters, classification, and impact of cross-linkage. Furthermore, we discuss the challenges and future perspectives in this field.
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Affiliation(s)
| | - Bongju Kim
- Dental Life Science Research Institute, Seoul National University Dental Hospital, Seoul 03080, Republic of Korea;
| | - Dong-Wook Han
- Institute of Nano-Bio Convergence, Pusan National University, Busan 46241, Republic of Korea
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
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Lu T, Yang L, Li Z, Liu Y, Xu S, Ye C. Immediate implantation of ultrafine fiber slow-release system based on cell electrospinning to induce osteogenesis of mesenchymal stem cells. Regen Biomater 2023; 11:rbad113. [PMID: 38225955 PMCID: PMC10789307 DOI: 10.1093/rb/rbad113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/21/2023] [Accepted: 12/08/2023] [Indexed: 01/17/2024] Open
Abstract
This study presents the development and evaluation of a poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P34HB) ultrafine fiber slow-release system for in vivo osteogenic induction of human umbilical cord mesenchymal stem cells (HUCMSCs). Utilizing dual-nozzle and cell electrospinning techniques, the system encapsulates L-ascorbic acid-2-phosphate magnesium (ASP), β-glycerophosphate sodium and dexamethasone (DEX) within the fibers, ensuring sustained osteogenic differentiation. The scaffold's morphology, characterization, hydrophilicity, mechanical properties and cellular behavior were examined. Immediate subcutaneous implantation in rabbits was conducted to observe its ectopic osteogenic induction effect. Successfully fabricated P34HB ultrafine fiber slow-release system. Characterization confirmed the uniform distribution of HUCMSCs and inducing components within the scaffold, with no chemical reactions affecting the active components. In vitro tests showcased a prolonged release of DEX and ASP, while biocompatibility assays highlighted the scaffold's suitability for cellular growth. Alizarin Red, type I collagen, and osteopontin (OPN) staining verified the scaffold's potent osteogenic induction effect on HUCMSCs. Notably, immediate implantation into New Zealand White rabbits led to significant new bone formation within 8 weeks. These findings underscore the system's potential for immediate in vivo implantation without prior in vitro induction, marking a promising advancement in bone tissue engineering.
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Affiliation(s)
- Tao Lu
- Department of Orthopaedics, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
- Department of Orthopaedics, The First People’s Hospital of Guiyang, Guiyang 550004, China
| | - Long Yang
- Department of Orthopaedics, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
- Center for Tissue Engineering and Stem Cell Research, Guizhou Medical University, Guiyang 550004, China
| | - Zhuoyang Li
- Department of Otolaryngology Head and Neck Surgery, Xinqiao Hospital, Army Medical University (Third Military Medical University), Chongqing 400037, China
| | - Yin Liu
- Center for Tissue Engineering and Stem Cell Research, Guizhou Medical University, Guiyang 550004, China
- Department of Dental implant, Stomatological Hospital of Guiyang, Guiyang 550000, China
| | - Shun'en Xu
- Department of Orthopaedics, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
- Center for Tissue Engineering and Stem Cell Research, Guizhou Medical University, Guiyang 550004, China
| | - Chuan Ye
- Department of Orthopaedics, The Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
- Center for Tissue Engineering and Stem Cell Research, Guizhou Medical University, Guiyang 550004, China
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de Castro R, Kandhola G, Kim JW, Moore QC, Thompson AK. Fabrication of Chitosan/PEGDA Bionanocomposites for Enhanced Drug Encapsulation and Release Efficiency. Mol Pharm 2023; 20:5532-5542. [PMID: 37774674 DOI: 10.1021/acs.molpharmaceut.3c00415] [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] [Indexed: 10/01/2023]
Abstract
Drug delivery systems (DDS) have evolved in the last decades with the development of hydrogels and particles. However, challenges such as high systemic uptake, side effects, low bioavailability, and encapsulation efficiency continue to be significant hurdles faced by such DDSs. Particles and hydrogels can be specifically designed for targeted DDSs to mitigate some of these problems. This study developed chitosan (Cs) particles (Ps) and composite films using poly(ethylene glycol) diacrylate (PEGDA) as a copolymer to encapsulate gentamicin (GtS) for drug delivery. We demonstrated that lysozyme degrades the chitosan β-1,4 glycosidic bonds to release GtS. PEGDA increased drug encapsulation efficiency by shielding the repelling forces of like charges between Cs and GtS. The data show that PEGDA does not hinder enzymatic degradation while increasing drug encapsulation efficiency and producing more homogeneous particles. Additionally, we utilized Michael's reaction to cross-link Cs, CsPs, and PEGDA to produce a film designed for drug delivery. The film is an anchor for CsPs to prevent premature drug release. The cross-linking of Cs and PEGDA does not affect lysozyme activity, and CsPs could successfully release GtS without affecting GtS activity.
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Affiliation(s)
- Raquel de Castro
- Department of Chemical Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Gurshagan Kandhola
- Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
- Institute for Nanoscience & Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Jin-Woo Kim
- Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
- Institute for Nanoscience & Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
- Materials Science & Engineering Program, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Quincy C Moore
- Department of Biology, Prairie View A&M University, Prairie View, Texas 77446, United States
| | - Audie K Thompson
- Department of Chemical Engineering, University of Arkansas, Fayetteville, Arkansas 72701, United States
- U.S. Army Engineer Research and Development Center (ERDC), Vicksburg, Mississippi 39180, United States
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Hashtrodylar Y, Rabbani S, Dadashzadeh S, Haeri A. Berberine-phospholipid nanoaggregate-embedded thiolated chitosan hydrogel for aphthous stomatitis treatment. Nanomedicine (Lond) 2023; 18:1227-1246. [PMID: 37712555 DOI: 10.2217/nnm-2023-0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023] Open
Abstract
Aim: This study aimed to develop nanoaggregates of berberine-phospholipid complex incorporated into thiolated chitosan (TCS) hydrogel for the treatment of aphthous stomatitis. Methods: The berberine-phospholipid complex was formulated through the solvent evaporation technique and assembled into nanoaggregates. TCS was synthesized through the attachment of thioglycolic acid to chitosan (CS). Nanoaggregates-TCS was prepared by the incorporation of nanoaggregates into TCS and underwent in vitro and in vivo tests. Results: Nanoaggregates-TCS exhibited prolonged release of berberine. The mucoadhesive strength of nanoaggregates-TCS increased 1.75-fold compared with CS hydrogel. In vivo studies revealed the superior therapeutic efficacy of nanoaggregates-TCS compared with that of other groups. Conclusion: Due to prolonged drug release, appropriate residence time and anti-inflammatory effects, nanoaggregates-TCS is an effective system for the treatment of aphthous stomatitis.
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Affiliation(s)
- Yasaman Hashtrodylar
- Department of Pharmaceutics & Pharmaceutical Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 1996835113, Tehran, Iran
| | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, 1313814117, Tehran, Iran
| | - Simin Dadashzadeh
- Department of Pharmaceutics & Pharmaceutical Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 1996835113, Tehran, Iran
| | - Azadeh Haeri
- Department of Pharmaceutics & Pharmaceutical Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, 1996835113, Tehran, Iran
- Protein Technology Research Center, Shahid Beheshti University of Medical Sciences, 1996835113, Tehran, Iran
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Zhao Y, Zhao S, Ma Z, Ding C, Chen J, Li J. Chitosan-Based Scaffolds for Facilitated Endogenous Bone Re-Generation. Pharmaceuticals (Basel) 2022; 15:ph15081023. [PMID: 36015171 PMCID: PMC9414235 DOI: 10.3390/ph15081023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/07/2022] [Accepted: 08/10/2022] [Indexed: 02/07/2023] Open
Abstract
Facilitated endogenous tissue engineering, as a facile and effective strategy, is emerging for use in bone tissue regeneration. However, the development of bioactive scaffolds with excellent osteo-inductivity to recruit endogenous stem cells homing and differentiation towards lesion areas remains an urgent problem. Chitosan (CS), with versatile qualities including good biocompatibility, biodegradability, and tunable physicochemical and biological properties is undergoing vigorously development in the field of bone repair. Based on this, the review focus on recent advances in chitosan-based scaffolds for facilitated endogenous bone regeneration. Initially, we introduced and compared the facilitated endogenous tissue engineering with traditional tissue engineering. Subsequently, the various CS-based bone repair scaffolds and their fabrication methods were briefly explored. Furthermore, the functional design of CS-based scaffolds in bone endogenous regeneration including biomolecular loading, inorganic nanomaterials hybridization, and physical stimulation was highlighted and discussed. Finally, the major challenges and further research directions of CS-based scaffolds were also elaborated. We hope that this review will provide valuable reference for further bone repair research in the future.
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Affiliation(s)
- Yao Zhao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Sinuo Zhao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Zhengxin Ma
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Chunmei Ding
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- Correspondence: (C.D.); (J.C.); (J.L.)
| | - Jingdi Chen
- Marine College, Shandong University, Weihai 264209, China
- Correspondence: (C.D.); (J.C.); (J.L.)
| | - Jianshu Li
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
- Med-X Center for Materials, Sichuan University, Chengdu 610041, China
- Correspondence: (C.D.); (J.C.); (J.L.)
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Tian Y, Wu D, Wu D, Cui Y, Ren G, Wang Y, Wang J, Peng C. Chitosan-Based Biomaterial Scaffolds for the Repair of Infected Bone Defects. Front Bioeng Biotechnol 2022; 10:899760. [PMID: 35600891 PMCID: PMC9114740 DOI: 10.3389/fbioe.2022.899760] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/20/2022] [Indexed: 12/15/2022] Open
Abstract
The treatment of infected bone defects includes infection control and repair of the bone defect. The development of biomaterials with anti-infection and osteogenic ability provides a promising strategy for the repair of infected bone defects. Owing to its antibacterial properties, chitosan (an emerging natural polymer) has been widely studied in bone tissue engineering. Moreover, it has been shown that chitosan promotes the adhesion and proliferation of osteoblast-related cells, and can serve as an ideal carrier for bone-promoting substances. In this review, the specific molecular mechanisms underlying the antibacterial effects of chitosan and its ability to promote bone repair are discussed. Furthermore, the properties of several kinds of functionalized chitosan are analyzed and compared with those of pure chitosan. The latest research on the combination of chitosan with different types of functionalized materials and biomolecules for the treatment of infected bone defects is also summarized. Finally, the current shortcomings of chitosan-based biomaterials for the treatment of infected bone defects and future research directions are discussed. This review provides a theoretical basis and advanced design strategies for the use of chitosan-based biomaterials in the treatment of infected bone defects.
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Affiliation(s)
- Yuhang Tian
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Danhua Wu
- The People’s Hospital of Chaoyang District, Changchun, China
| | - Dankai Wu
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Yutao Cui
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Guangkai Ren
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Yanbing Wang
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Jincheng Wang
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Chuangang Peng
- Orthopedic Medical Center, The Second Hospital of Jilin University, Changchun, China
- *Correspondence: Chuangang Peng,
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Bordini EAF, Ferreira JA, Dubey N, Ribeiro JS, de Souza Costa CA, Soares DG, Bottino MC. Injectable Multifunctional Drug Delivery System for Hard Tissue Regeneration under Inflammatory Microenvironments. ACS APPLIED BIO MATERIALS 2021; 4:6993-7006. [PMID: 35006932 DOI: 10.1021/acsabm.1c00620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Engineering multifunctional hydrogel systems capable of amplifying the regenerative capacity of endogenous progenitor cells via localized presentation of therapeutics under tissue inflammation is central to the translation of effective strategies for hard tissue regeneration. Here, we loaded dexamethasone (DEX), a pleotropic drug with anti-inflammatory and mineralizing abilities, into aluminosilicate clay nanotubes (halloysite clay nanotubes (HNTs)) to engineer an injectable multifunctional drug delivery system based on photo-cross-linkable gelatin methacryloyl (GelMA) hydrogel. In detail, a series of hydrogels based on GelMA formulations containing distinct amounts of DEX-loaded nanotubes was analyzed for physicochemical and mechanical properties and kinetics of DEX release as well as compatibility with mesenchymal stem cells from human exfoliated deciduous teeth (SHEDs). The anti-inflammatory response and mineralization potential of the engineered hydrogels were determined in vitro and in vivo. DEX conjugation with HNTs was confirmed by FTIR analysis. The incorporation of DEX-loaded nanotubes enhanced the mechanical strength of GelMA with no effect on its degradation and swelling ratio. Scanning electron microscopy (SEM) images demonstrated the porous architecture of GelMA, which was not significantly altered by DEX-loaded nanotubes' (HNTs/DEX) incorporation. All GelMA formulations showed cytocompatibility with SHEDs (p < 0.05) regardless of the presence of HNTs or HNTs/DEX. However, the highest osteogenic cell differentiation was noticed with the addition of HNT/DEX 10% in GelMA formulations (p < 0.01). The controlled release of DEX over 7 days restored the expression of alkaline phosphatase and mineralization (p < 0.0001) in lipopolysaccharide (LPS)-stimulated SHEDs in vitro. Importantly, in vivo data revealed that DEX-loaded nanotube-modified GelMA (5.0% HNT/DEX 10%) led to enhanced bone formation after 6 weeks (p < 0.0001) compared to DEX-free formulations with a minimum localized inflammatory response after 7 days. Altogether, our findings show that the engineered DEX-loaded nanotube-modified hydrogel may possess great potential to trigger in situ mineralized tissue regeneration under inflammatory conditions.
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Affiliation(s)
- Ester A F Bordini
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, 1011 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Jessica A Ferreira
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, 1011 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Nileshkumar Dubey
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, 1011 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Juliana S Ribeiro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, 1011 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Carlos A de Souza Costa
- Department of Physiology and Pathology, Araraquara School of Dentistry, Universidade Estadual Paulista (UNESP), 1680 Humaitá Street, Araraquara, Sao Paulo 14801-903, Brazil
| | - Diana G Soares
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, Sao Paulo University (USP), Al. Dr. Octavio Pinheiro Brizola, 9-75, Bauru, Sao Paulo 17012-901, Brazil
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, 1011 N. University Ave., Ann Arbor, Michigan 48109, United States.,Department of Biomedical Engineering, College of Engineering, University of Michigan, Carl A. Gerstacker Building, 2200 Bonisteel Blvd., Ann Arbor, Michigan 48109, United States
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