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Zhou Z, Liu J, Xiong T, Liu Y, Tuan RS, Li ZA. Engineering Innervated Musculoskeletal Tissues for Regenerative Orthopedics and Disease Modeling. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310614. [PMID: 38200684 DOI: 10.1002/smll.202310614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/28/2023] [Indexed: 01/12/2024]
Abstract
Musculoskeletal (MSK) disorders significantly burden patients and society, resulting in high healthcare costs and productivity loss. These disorders are the leading cause of physical disability, and their prevalence is expected to increase as sedentary lifestyles become common and the global population of the elderly increases. Proper innervation is critical to maintaining MSK function, and nerve damage or dysfunction underlies various MSK disorders, underscoring the potential of restoring nerve function in MSK disorder treatment. However, most MSK tissue engineering strategies have overlooked the significance of innervation. This review first expounds upon innervation in the MSK system and its importance in maintaining MSK homeostasis and functions. This will be followed by strategies for engineering MSK tissues that induce post-implantation in situ innervation or are pre-innervated. Subsequently, research progress in modeling MSK disorders using innervated MSK organoids and organs-on-chips (OoCs) is analyzed. Finally, the future development of engineering innervated MSK tissues to treat MSK disorders and recapitulate disease mechanisms is discussed. This review provides valuable insights into the underlying principles, engineering methods, and applications of innervated MSK tissues, paving the way for the development of targeted, efficacious therapies for various MSK conditions.
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Affiliation(s)
- Zhilong Zhou
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Jun Liu
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
| | - Tiandi Xiong
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
| | - Yuwei Liu
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Shenzhen Second People's Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, 518000, P. R. China
| | - Rocky S Tuan
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
| | - Zhong Alan Li
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Shatin, NT, Hong Kong SAR, P. R. China
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Key Laboratory of Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, P. R. China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518057, P. R. China
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Cheng Q, Zhang L, Zhang J, Zhou X, Wu B, Wang D, Wei T, Shafiq M, Li S, Zhi D, Guan Y, Wang K, Kong D. Decellularized Scaffolds with Double-Layer Aligned Microchannels Induce the Oriented Growth of Bladder Smooth Muscle Cells: Toward Urethral and Ureteral Reconstruction. Adv Healthc Mater 2023; 12:e2300544. [PMID: 37638600 DOI: 10.1002/adhm.202300544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 06/27/2023] [Indexed: 08/29/2023]
Abstract
There is a great clinical need for regenerating urinary tissue. Native urethras and ureters have bidirectional aligned smooth muscle cells (SMCs) layers, which plays a pivotal role in micturition and transporting urine and inhibiting reflux. Thus far, urinary scaffolds have not been designed to induce the native-mimicking aligned arrangement of SMCs. In this study, a tubular decellularized extracellular matrix (dECM) with an intact internal layer and bidirectional aligned microchannels in the tubular wall, which is realized by the subcutaneous implantation of a template, followed by the removal of the template, and decellularization, is engineered. The dense and intact internal layer effectively increases the leakage pressure of the tubular dECM scaffolds. Rat-derived dECM scaffolds with three different sizes of microchannels are fabricated by tailoring the fiber diameter of the templates. The rat-derived dECM scaffolds exhibiting microchannels of ≈65 µm show suitable mechanical properties, good ability to induce the bidirectional alignment and growth of human bladder SMCs, and elevated higher functional protein expression in vitro. These data indicate that rat-derived tubular dECM scaffolds manifesting double-layer aligned microchannels may be promising candidates to induce the native-mimicking regeneration of SMCs in urethra and ureter reconstruction.
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Affiliation(s)
- Quhan Cheng
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Linli Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Jingai Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xin Zhou
- Department of Medical Imaging, Shanxi Medical University, Taiyuan, 030001, China
| | - Boyu Wu
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Dezheng Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Tingting Wei
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Muhammad Shafiq
- Department of Chemical Engineering, Faculty of Engineering, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Shengbin Li
- Department of Urology, Tianjin Children's Hospital/Tianjin University Children's Hospital, Tianjin, 300134, China
| | - Dengke Zhi
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Yong Guan
- Department of Urology, Tianjin Children's Hospital/Tianjin University Children's Hospital, Tianjin, 300134, China
| | - Kai Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Deling Kong
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
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Pei B, Hu M, Wu X, Lu D, Zhang S, Zhang L, Wu S. Investigations into the effects of scaffold microstructure on slow-release system with bioactive factors for bone repair. Front Bioeng Biotechnol 2023; 11:1230682. [PMID: 37781533 PMCID: PMC10537235 DOI: 10.3389/fbioe.2023.1230682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 09/01/2023] [Indexed: 10/03/2023] Open
Abstract
In recent years, bone tissue engineering (BTE) has played an essential role in the repair of bone tissue defects. Although bioactive factors as one component of BTE have great potential to effectively promote cell differentiation and bone regeneration, they are usually not used alone due to their short effective half-lives, high concentrations, etc. The release rate of bioactive factors could be controlled by loading them into scaffolds, and the scaffold microstructure has been shown to significantly influence release rates of bioactive factors. Therefore, this review attempted to investigate how the scaffold microstructure affected the release rate of bioactive factors, in which the variables included pore size, pore shape and porosity. The loading nature and the releasing mechanism of bioactive factors were also summarized. The main conclusions were achieved as follows: i) The pore shapes in the scaffold may have had no apparent effect on the release of bioactive factors but significantly affected mechanical properties of the scaffolds; ii) The pore size of about 400 μm in the scaffold may be more conducive to controlling the release of bioactive factors to promote bone formation; iii) The porosity of scaffolds may be positively correlated with the release rate, and the porosity of 70%-80% may be better to control the release rate. This review indicates that a slow-release system with proper scaffold microstructure control could be a tremendous inspiration for developing new treatment strategies for bone disease. It is anticipated to eventually be developed into clinical applications to tackle treatment-related issues effectively.
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Affiliation(s)
- Baoqing Pei
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Mengyuan Hu
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Xueqing Wu
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Da Lu
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Shijia Zhang
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Le Zhang
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Shuqin Wu
- School of Big Data and Information, Shanxi College of Technology, Taiyuan, Shanxi, China
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Chinnasami H, Dey MK, Devireddy R. Three-Dimensional Scaffolds for Bone Tissue Engineering. Bioengineering (Basel) 2023; 10:759. [PMID: 37508786 PMCID: PMC10376773 DOI: 10.3390/bioengineering10070759] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/21/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
Immobilization using external or internal splints is a standard and effective procedure to treat minor skeletal fractures. In the case of major skeletal defects caused by extreme trauma, infectious diseases or tumors, the surgical implantation of a bone graft from external sources is required for a complete cure. Practical disadvantages, such as the risk of immune rejection and infection at the implant site, are high in xenografts and allografts. Currently, an autograft from the iliac crest of a patient is considered the "gold standard" method for treating large-scale skeletal defects. However, this method is not an ideal solution due to its limited availability and significant reports of morbidity in the harvest site (30%) as well as the implanted site (5-35%). Tissue-engineered bone grafts aim to create a mechanically strong, biologically viable and degradable bone graft by combining a three-dimensional porous scaffold with osteoblast or progenitor cells. The materials used for such tissue-engineered bone grafts can be broadly divided into ceramic materials (calcium phosphates) and biocompatible/bioactive synthetic polymers. This review summarizes the types of materials used to make scaffolds for cryo-preservable tissue-engineered bone grafts as well as the distinct methods adopted to create the scaffolds, including traditional scaffold fabrication methods (solvent-casting, gas-foaming, electrospinning, thermally induced phase separation) and more recent fabrication methods (fused deposition molding, stereolithography, selective laser sintering, Inkjet 3D printing, laser-assisted bioprinting and 3D bioprinting). This is followed by a short summation of the current osteochondrogenic models along with the required scaffold mechanical properties for in vivo applications. We then present a few results of the effects of freezing and thawing on the structural and mechanical integrity of PLLA scaffolds prepared by the thermally induced phase separation method and conclude this review article by summarizing the current regulatory requirements for tissue-engineered products.
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Affiliation(s)
- Harish Chinnasami
- Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Mohan Kumar Dey
- Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Ram Devireddy
- Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
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Wang X, Shi C, Hou X, Song S, Li C, Cao W, Chen W, Li L. Application of biomaterials and tissue engineering in bladder regeneration. J Biomater Appl 2022; 36:1484-1502. [DOI: 10.1177/08853282211048574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The primary functions of the bladder are storing urine under low and stable pressure and micturition. Various forms of trauma, tumors, and iatrogenic injuries can cause the loss of or reduce bladder function or capacity. If such damage is not treated in time, it will eventually lead to kidney damage and can even be life-threatening in severe cases. The emergence of tissue engineering technology has led to the development of more possibilities for bladder repair and reconstruction, in which the selection of scaffolds is crucial. In recent years, a growing number of tissue-engineered bladder scaffolds have been constructed. Therefore, this paper will discuss the development of tissue-engineered bladder scaffolds and will further analyze the limitations of and challenges encountered in bladder reconstruction.
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Affiliation(s)
- Xiaoya Wang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Chunying Shi
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Xianglin Hou
- Institute of genetics and developmental biology, Chinese Academy of Sciences, Beijing, China
| | - Siqi Song
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Chenglin Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Wenxuan Cao
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Wei Chen
- Department of Urology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Ling Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
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6
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Lin SJ, Chan YC, Su ZC, Yeh WL, Lai PL, Chu IM. Growth factor-loaded microspheres in mPEG-polypeptide hydrogel system for articular cartilage repair. J Biomed Mater Res A 2021; 109:2516-2526. [PMID: 34190399 DOI: 10.1002/jbm.a.37246] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 01/20/2023]
Abstract
We developed an injectable hydrogel system with a sustained release of TGF-β3 through growth factor-loaded microsphere to mimic the cartilage-like microenvironment. Poly(lactic-co-glycolic acid) (PLGA) microspheres incorporated in three dimensional (3D) scaffolds were chosen because of its regulatory approval, good biodegradability, and acting as carriers with sustained release behavior. We evaluated sustained release of TGF-β3 by PLGA microspheres encapsulated in methoxy poly(ethylene glycol)-poly(alanine) (mPA) hydrogels and the resulting enhanced chondrogenic effects. We reported here the effect of the proposed system for sustained release of growth factors on chondrogenesis in cartilage regeneration. PLGA microspheres were used in our thermosensitive mPA hydrogel system with bovine serum albumin as a stabilizing and protecting agent for the emulsion and TGF-β3 enabling sustained release. Gelation, structural properties, and in-vitro release of this composite, that is, microspheres in hydrogel, system were investigated. Using PLGA microspheres to carry growth factors could complement the mPA hydrogel's ability to provide an excellent 3D microenvironment for the promotion of chondrogenic phenotype as compared the systems using mPA hydrogel or microspheres alone. Our study demonstrated that this synthesized composite hydrogel system is capable of modulating the biosynthetic and differentiation activities of chondrocytes. The sustained release of TGF-β3 in this novel hydrogel system could improve biomedical applicability of mPEG-polypeptide scaffolds. The distinctive local growth factor delivery system successfully combined the use of both polymers to be a suitable candidate for prolonged articular cartilage regeneration.
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Affiliation(s)
- Shih-Jie Lin
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan.,Department of Orthopaedic Surgery, New Taipei Municipal TuCheng Hospital, Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Bone and Joint Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Yun-Chen Chan
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Zih-Cheng Su
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Wen-Ling Yeh
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan.,Department of Orthopaedic Surgery, Lotung Poh-Ai Hospital, Yilan, Taiwan
| | - Po-Liang Lai
- Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - I-Ming Chu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan
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7
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Herbal Plant Leaf Extracts Immobilized PCL Nanofibrous Mats as Skin-Inspired Anti-infection Wound Healing Material. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2021. [DOI: 10.1007/s40883-020-00193-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Tiwari S, Patil R, Dubey SK, Bahadur P. Graphene nanosheets as reinforcement and cell-instructive material in soft tissue scaffolds. Adv Colloid Interface Sci 2020; 281:102167. [PMID: 32361407 DOI: 10.1016/j.cis.2020.102167] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 12/11/2022]
Abstract
Mechanical strength of polymeric scaffolds deteriorates quickly in the physiological mileu. This can be minimized by reinforcing the polymeric matrix with graphene, a planar two-dimensional material with unique physicochemical and biological properties. Association between the sheet and polymer chains offers a range of porosity commensurate with tissue requirements. Besides, studies suggest that corrugated structure of graphene offers desirable bio-mechanical cues for tissue regeneration. This review covers three important aspects of graphene-polymer composites, (a) the opportunity on reinforcing the polymer matrix with graphene, (b) challenges associated with limited aqueous processability of graphene, and (c) physiological signaling in the presence of graphene. Among numerous graphene materials, our discussion is limited to graphene oxide (GO) and reduced graphene oxide (rGO) nanosheets. Challenges associated with limited dispersity of hydrophobic sheets within the polymeric matrix have been discussed at molecular level.
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9
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Tanaka M, Aoki K, Haniu H, Kamanaka T, Takizawa T, Sobajima A, Yoshida K, Okamoto M, Kato H, Saito N. Applications of Carbon Nanotubes in Bone Regenerative Medicine. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E659. [PMID: 32252244 PMCID: PMC7221610 DOI: 10.3390/nano10040659] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 03/28/2020] [Accepted: 03/29/2020] [Indexed: 01/02/2023]
Abstract
Scaffolds are essential for bone regeneration due to their ability to maintain a sustained release of growth factors and to provide a place where cells that form new bone can enter and proliferate. In recent years, scaffolds made of various materials have been developed and evaluated. Functionally effective scaffolds require excellent cell affinity, chemical properties, mechanical properties, and safety. Carbon nanotubes (CNTs) are fibrous nanoparticles with a nano-size diameter and have excellent strength and chemical stability. In the industrial field, they are used as fillers to improve the performance of materials. Because of their excellent physicochemical properties, CNTs are studied for their promising clinical applications as biomaterials. In this review article, we focused on the results of our research on CNT scaffolds for bone regeneration, introduced the promising properties of scaffolds for bone regeneration, and described the potential of CNT scaffolds.
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Affiliation(s)
- Manabu Tanaka
- Department of Orthopaedic Surgery, Okaya City Hospital, 4-11-33 Honcho, Okaya, Nagano 394-8512, Japan
| | - Kaoru Aoki
- Physical Therapy Division, School of Health Sciences, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan;
| | - Hisao Haniu
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (H.H.); (N.S.)
- Department of Biomedical Engineering, Graduate School of Medicine, Science and Technology, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan
| | - Takayuki Kamanaka
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (T.K.); (T.T.); (K.Y.); (M.O.); (H.K.)
| | - Takashi Takizawa
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (T.K.); (T.T.); (K.Y.); (M.O.); (H.K.)
| | - Atsushi Sobajima
- Department of Orthopaedic Surgery, Marunouchi Hospital, 1-7-45 Nagisa, Matsumoto, Nagano 390-8601, Japan;
| | - Kazushige Yoshida
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (T.K.); (T.T.); (K.Y.); (M.O.); (H.K.)
| | - Masanori Okamoto
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (T.K.); (T.T.); (K.Y.); (M.O.); (H.K.)
| | - Hiroyuki Kato
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (T.K.); (T.T.); (K.Y.); (M.O.); (H.K.)
| | - Naoto Saito
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan; (H.H.); (N.S.)
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Kayıran Çelebier S, Bozdağ Pehlivan S, Demirbilek M, Akıncı M, Vural İ, Akdağ Y, Yürüker S, Ünlü N. Development of an Anti-Inflammatory Drug-Incorporated Biomimetic Scaffold for Corneal Tissue Engineering. J Ocul Pharmacol Ther 2020; 36:433-446. [PMID: 32023420 DOI: 10.1089/jop.2019.0114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Purpose: The aim of this study was to design naproxen sodium (NS)-containing, biomimetic, porous poly(lactide-co-glycolide) (PLGA) scaffolds for regeneration of damaged corneal epithelium. Methods: NS-incorporated PLGA scaffolds were prepared using the emulsion freeze-drying method and then coated with collagen or poly-l-lysine. Porosity measurements of the scaffolds were performed by the gas adsorption/desorption method and the scaffolds demonstrated highly porous, open-cellular pore structures with pore sizes from 150 to 200 μm. Results: The drug loading efficiency of scaffolds was found to be higher than 84%, and about 90%-98% of NS was released at the end of 7 days with a fast drug release rate at the initial period of time and then in a slow and sustained manner. The corneal epithelial cells were isolated from New Zealand white rabbits. The obtained cells were seeded onto scaffolds and continued to increase during the time period of the study, indicating that the scaffolds might promote corneal epithelial cell proliferation without causing toxic effects for at least 10 days. Conclusions: The NS-loaded PLGA scaffolds exhibited a combination of controlled drug release and biomimetic properties that might be attractive for use in treatment of corneal damage both for controlled release and biomedical applications.
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Affiliation(s)
- Seren Kayıran Çelebier
- Department of Pharmaceutical Technology, Faculty of Pharmacy, and Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Sibel Bozdağ Pehlivan
- Department of Pharmaceutical Technology, Faculty of Pharmacy, and Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Murat Demirbilek
- Nanotechnology Nanomedicine Department, Hacettepe University, Ankara, Turkey
| | - Murat Akıncı
- Department of Medical Genetics, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - İmran Vural
- Department of Pharmaceutical Technology, Faculty of Pharmacy, and Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Yağmur Akdağ
- Department of Pharmaceutical Technology, Faculty of Pharmacy, and Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Sinan Yürüker
- Department of Histology and Embryology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Nurşen Ünlü
- Department of Pharmaceutical Technology, Faculty of Pharmacy, and Faculty of Medicine, Hacettepe University, Ankara, Turkey
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11
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Tanodekaew S, Channasanon S, Kaewkong P. Heat-curing polylactide for bone implants: Preparation and investigation on properties relevant to degradation. J BIOACT COMPAT POL 2019. [DOI: 10.1177/0883911519881715] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Several processes have been used to produce polylactide for bone replacement. The challenge remains, however, to produce these devices by a simpler and more economical process. In this study, a method of combining powder and liquid parts was introduced. Star-shaped polylactides with molecular weights ranging from 3 to 16 kg/mol were synthesized and blended with a linear polylactide (Mw = 188 kg/mol) using the technique of emulsion solvent evaporation. The blends in a form of spherical powder were characterized by scanning electron microscopy, gel permeation chromatography, and particle size analysis. The heat-curing polylactide was fabricated by mixing the powder with triethylene glycol dimethacrylate, molded, and then heated in a hot water bath to solidify. The effects of powder composition in terms of amount and molecular weight of the star-shaped polylactide on mechanical properties were investigated. The results showed an increase in flexural strength with increase in the amount of star-shaped polylactide. The powder comprised star-shaped polylactide having the molecular weight of 10,770 g/mol, not less than 80wt%, offered the fabricated heat-curing polylactide with high strength ranging from 95 to 100 MPa. This formulation was further incorporated with hydroxyapatite to improve biocompatibility and subjected to degradation at 37°C. Mechanical test and weight loss determination together with biological test were conducted at certain times during degradation of the materials. Both materials with and without hydroxyapatite showed mechanical stability upon degradation for at least 6 months, but the one with hydroxyapatite revealed significantly better bioactivity at the end of 1-year follow-up study, making it the most promising material for bone implants.
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Affiliation(s)
| | | | - Pakkanun Kaewkong
- National Metal and Materials Technology Center, Pathum Thani, Thailand
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12
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Thomas A, Bera J. Preparation and characterization of gelatin-bioactive glass ceramic scaffolds for bone tissue engineering. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:561-579. [DOI: 10.1080/09205063.2019.1587697] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ashley Thomas
- Department of Ceramic Engineering, National Institute of Technology, Rourkela, Odisha, India
| | - Japes Bera
- Department of Ceramic Engineering, National Institute of Technology, Rourkela, Odisha, India
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13
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Cheng A, Schwartz Z, Kahn A, Li X, Shao Z, Sun M, Ao Y, Boyan BD, Chen H. Advances in Porous Scaffold Design for Bone and Cartilage Tissue Engineering and Regeneration. TISSUE ENGINEERING. PART B, REVIEWS 2019; 25:14-29. [PMID: 30079807 PMCID: PMC6388715 DOI: 10.1089/ten.teb.2018.0119] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 08/01/2018] [Indexed: 12/11/2022]
Abstract
IMPACT STATEMENT Challenges in musculoskeletal tissue regeneration affect millions of patients globally. Scaffolds for tissue engineering bone and cartilage provide promising solutions that increase healing and decrease need for complicated surgical procedures. Porous scaffolds have emerged as an attractive alternative to traditional scaffolds. However, the success of advanced materials, use of biological factors, and manufacturing techniques can vary depending on use case. This review provides perspective on porous scaffold manufacturing, characterization and application, and can be used to inform future scaffold design.
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Affiliation(s)
- Alice Cheng
- Department of Biomedical Engineering, Peking University, Beijing, China
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Zvi Schwartz
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia
- Department of Periodontology, University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Adrian Kahn
- Department of Oral and Maxillofacial Surgery, University of Tel Aviv, Tel Aviv, Israel
| | - Xiyu Li
- Department of Biomedical Engineering, Peking University, Beijing, China
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
| | - Zhenxing Shao
- Institute of Sports Medicine, Peking University Third Hospital, Beijing, China
| | - Muyang Sun
- Department of Biomedical Engineering, Peking University, Beijing, China
| | - Yingfang Ao
- Institute of Sports Medicine, Peking University Third Hospital, Beijing, China
| | - Barbara D. Boyan
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia
| | - Haifeng Chen
- Department of Biomedical Engineering, Peking University, Beijing, China
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14
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Mallakpour S, Azimi F. Using sonochemistry for the production of poly(vinyl alcohol)/MWCNT–vitamin B1 nanocomposites: exploration of morphology, thermal and mechanical properties. NEW J CHEM 2019. [DOI: 10.1039/c9nj00116f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Functionalized MWCNTs with vitamin B1 as a green material were applied for the enhancement of poly(vinyl alcohol) properties.
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Affiliation(s)
- Shadpour Mallakpour
- Organic Polymer Chemistry Research Laboratory
- Department of Chemistry, Isfahan University of Technology
- Isfahan 84156-83111
- Islamic Republic of Iran
- Research Institute for Nanotechnology and Advanced Materials
| | - Faezeh Azimi
- Chemistry Group
- Pardis College
- Isfahan University of Technology
- Isfahan 84156-83111
- Islamic Republic of Iran
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15
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Hassanzadeh P, Atyabi F, Dinarvand R. Tissue engineering: Still facing a long way ahead. J Control Release 2018; 279:181-197. [DOI: 10.1016/j.jconrel.2018.04.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
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16
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Influence of Molecular Characteristics of Chitosan on Properties of In situ Formed Scaffolds. BIONANOSCIENCE 2017. [DOI: 10.1007/s12668-017-0411-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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He J, Hu H, Zeng X, Lan F, Wu F, Wu Y. A magnetic hydroxyapatite composite scaffold-based magnetic therapy for bone repair: an experimental study in canis lupus familiaris. Regen Biomater 2017. [DOI: 10.1093/rb/rbw039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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18
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Jahandideh A, Muthukumarappan K. Star-shaped lactic acid based systems and their thermosetting resins; synthesis, characterization, potential opportunities and drawbacks. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Im P, Ji DH, Kim MK, Kim J. Fabrication of cell-benign inverse opal hydrogels for three-dimensional cell culture. J Colloid Interface Sci 2017; 494:389-396. [PMID: 28171847 DOI: 10.1016/j.jcis.2017.01.108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/26/2017] [Accepted: 01/27/2017] [Indexed: 10/20/2022]
Abstract
Inverse opal hydrogels (IOHs) for cell culture were fabricated and optimized using calcium-crosslinked alginate microbeads as sacrificial template and gelatin as a matrix. In contrast to traditional three-dimensional (3D) scaffolds, the gelatin IOHs allowed the utilization of both the macropore surface and inner matrix for cell co-culture. In order to remove templates efficiently for the construction of 3D interconnected macropores and to maintain high cell viability during the template removal process using EDTA solution, various factors in fabrication, including alginate viscosity, alginate concentration, alginate microbeads size, crosslinking calcium concentration, and gelatin network density were investigated. Low viscosity alginate, lower crosslinking calcium ion concentration, and lower concentration of alginate and gelatin were found to obtain high viability of cells encapsulated in the gelatin matrix after removal of the alginate template by EDTA treatment by allowing rapid dissociation and diffusion of alginate polymers. Based on the optimized fabrication conditions, gelatin IOHs showed good potential as a cell co-culture system, applicable to tissue engineering and cancer research.
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Affiliation(s)
- Pilseon Im
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Dong Hwan Ji
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Min Kyung Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Jaeyun Kim
- School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Samsung Advanced Institute for Health Science & Technology (SAIHST), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
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20
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Abstract
Growth factors are essential orchestrators of the normal bone fracture healing response. For non-union defects, delivery of exogenous growth factors to the injured site significantly improves healing outcomes. However, current clinical methods for scaffold-based growth factor delivery are fairly rudimentary, and there is a need for greater spatial and temporal regulation to increase their in vivo efficacy. Various approaches used to provide spatiotemporal control of growth factor delivery from bone tissue engineering scaffolds include physical entrapment, chemical binding, surface modifications, biomineralization, micro- and nanoparticle encapsulation, and genetically engineered cells. Here, we provide a brief review of these technologies, describing the fundamental mechanisms used to regulate release kinetics. Examples of their use in pre-clinical studies are discussed, and their capacities to provide tunable, growth factor delivery are compared. These advanced scaffold systems have the potential to provide safer, more effective therapies for bone regeneration than the systems currently employed in the clinic.
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21
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Zhu H, Wu Q, Shentu J, Wang H, Hu Y, Zhu K, Liu J. Release Behavior and Biological Activity of Recombinant Human Bone Morphogenetic Protein-2 from Porous PLGA Scaffold. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911505053384] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The feasibility of using the poly-(DL-lactic-co-glycolic acid) (PLGA) scaffold as a carrier for controlled recombinant human bone morphogenetic protein-2 (rhBMP-2) delivery was assessed. PLGA rhBMP-2-loaded scaffolds were fabricated by emulsion polymerization and freeze-dried; a porous morphology was observed by scanning electron microscopy. The in vitro release of rhBMP-2 from the polymer was assessed using high performance liquid chromatography. An initial burst release of the incorporated rhBMP-2 was observed over the first 24h followed by an 80.6% sustained release for one month. The rhBMP-2-loaded scaffolds were implanted bilaterally into rat ectopic muscle pouches. The rhBMP-2 implanted animals showed bone formation submuscle space and osteoblasts located in the new bone region while none was seen in the control groups.
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Affiliation(s)
- Huiyong Zhu
- Stomatology Department of the First Affiliated Hospital, Medical College, Zhejiang University, Hangzhou 310003 China, ,
| | - Qiuliang Wu
- Stomatology Department of the First Affiliated Hospital, Medical College, Zhejiang University, Hangzhou 310003 China
| | - Jianzhong Shentu
- Clinical Pharmacology Laboratory of the First Affiliated Hospital, Medical College, Zhejiang University, Hangzhou 310003 China
| | - Huiming Wang
- Stomatology Department of the First Affiliated Hospital, Medical College, Zhejiang University, Hangzhou 310003 China
| | - Yingqian Hu
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310003 China
| | - Kangjie Zhu
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310003 China
| | - Jianhua Liu
- Stomatology Department of the First Affiliated Hospital, Medical College, Zhejiang University, Hangzhou 310003 China
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22
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Zhou NF, Huang YF, Wang JW. Effect of a bioabsorbable, super-high molecular weight poly-D,L-lactic acid plate containing recombinant human bone morphogenetic protein-2 for fracture healing. Exp Ther Med 2015; 10:1840-1844. [PMID: 26640559 DOI: 10.3892/etm.2015.2750] [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: 12/12/2013] [Accepted: 07/02/2015] [Indexed: 11/05/2022] Open
Abstract
The aim of this study was to investigate the effect of a bioabsorbable, super-high molecular weight poly-D,L-lactic acid (PDLLA) plate exhibiting the sustained release of recombinant human bone morphogenetic protein-2 (rhBMP-2) (PDLLA-rhBMP-2) on the treatment of fracture with internal fixation. A total of 32 New Zealand rabbits were randomly allocated to one of four groups (2, 4, 8 and 12 weeks), and a 2.5-mm middle ulnar osteotomy was performed bilaterally. The right side (experimental side) was fixed internally with PDLLA-rhBMP-2, and the left side (control side) was fixed with a normal PDLLA plate. At 2, 4, 8 and 12 weeks after surgery, the gross pathology of the ulnas was examined and radiographic, histological and computer image analyses were performed. The results demonstrated that the ulna fractures were fixed stably with the two bioactive plates at 2, 4, 8 and 12 weeks after surgery. At the 8-week time-point, 7 rabbits exhibited good healing at the osteotomy site on the experimental side. At 12 weeks after surgery, 8 rabbits exhibited good healing at the osteotomy site on both sides, but the experimental side showed enhanced compatibility between the plates and surrounding tissue, faster bone formation, a greater bone regeneration mass and better medullary canal structure compared with the control side. In conclusion, PPLLA-rhBMP-2 may be effectively used to treat fracture or nonunion at a non-weight-bearing site.
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Affiliation(s)
- Ning-Feng Zhou
- Department of Spinal Surgery, Shanghai East Hospital Affiliated to Shanghai Tongji University, Shanghai 200120, P.R. China
| | - Yu-Feng Huang
- Department of Spinal Surgery, Shanghai East Hospital Affiliated to Shanghai Tongji University, Shanghai 200120, P.R. China
| | - Jin-Wu Wang
- Department of Orthopedics, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai 200011, P.R. China
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23
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Chahibi Y, Akyildiz IF, Balasubramaniam S, Koucheryavy Y. Molecular Communication Modeling of Antibody-Mediated Drug Delivery Systems. IEEE Trans Biomed Eng 2015; 62:1683-95. [DOI: 10.1109/tbme.2015.2400631] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Takei T, Aokawa R, Shigemitsu T, Kawakami K, Yoshida M. Fabrication of uniformly cell-laden porous scaffolds using a gas-in-liquid templating technique. J Biosci Bioeng 2015; 120:577-81. [PMID: 25912452 DOI: 10.1016/j.jbiosc.2015.03.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/08/2015] [Accepted: 03/25/2015] [Indexed: 12/18/2022]
Abstract
Design of porous scaffolds in tissue engineering field was challenging. Uniform immobilization of cells in the scaffolds with high porosity was essential for homogeneous tissue formation. The present study was aimed at fabricating uniformly cell-laden porous scaffolds with porosity >74% using the gas-in-liquid foam templating technique. To this end, we used gelatin, microbial transglutaminase and argon gas as a scaffold material, cross-linker of the protein and porogen of scaffold, respectively. We confirmed that a porosity of >74% could be achieved by increasing the gas volume delivered to a gelatin solution. Pore size in the scaffold could be controlled by stirring speed, stirring time and the pore size of the filter through which the gas passed. The foaming technique enabled us to uniformly immobilize a human hepatoblastoma cell line in scaffold. Engraftment efficiency of the cell line entrapped within the scaffold in nude mice was higher than that of cells in free-form. These results showed that the uniformly cell-laden porous scaffolds were promising for tissue engineering.
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Affiliation(s)
- Takayuki Takei
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Ryuta Aokawa
- Department of Chemical Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0385, Japan.
| | - Takamasa Shigemitsu
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
| | - Koei Kawakami
- Department of Chemical Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0385, Japan.
| | - Masahiro Yoshida
- Department of Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
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25
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Yu X, Suárez-González D, Khalil AS, Murphy WL. How does the pathophysiological context influence delivery of bone growth factors? Adv Drug Deliv Rev 2015; 84:68-84. [PMID: 25453269 PMCID: PMC4401584 DOI: 10.1016/j.addr.2014.10.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 08/29/2014] [Accepted: 10/07/2014] [Indexed: 02/08/2023]
Abstract
"Orthobiologics" represents an important category of therapeutics for the regeneration of bone defects caused by injuries or diseases, and bone growth factors are a particularly rapidly growing sub-category. Clinical application of bone growth factors has accelerated in the last two decades with the introduction of BMPs into clinical bone repair. Optimal use of growth factor-mediated treatments heavily relies on controlled delivery, which can substantially influence the local growth factor dose, release kinetics, and biological activity. The characteristics of the surrounding environment, or "context", during delivery can dictate growth factor loading efficiency, release and biological activity. This review discusses the influence of the surrounding environment on therapeutic delivery of bone growth factors. We specifically focus on pathophysiological components, including soluble components and cells, and how they can actively influence the therapeutic delivery and perhaps efficacy of bone growth factors.
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Affiliation(s)
- Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Darilis Suárez-González
- Department of Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, 53705, USA
| | - Andrew S Khalil
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - William L Murphy
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA; Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI, 53705, USA.
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26
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In vitro co-culture strategies to prevascularization for bone regeneration: A brief update. Tissue Eng Regen Med 2015. [DOI: 10.1007/s13770-014-0095-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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27
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Mas N, Arcos D, Polo L, Aznar E, Sánchez-Salcedo S, Sancenón F, García A, Marcos MD, Baeza A, Vallet-Regí M, Martínez-Máñez R. Towards the Development of Smart 3D "gated scaffolds" for on-command delivery. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:4859-4864. [PMID: 25079146 DOI: 10.1002/smll.201401227] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 06/28/2014] [Indexed: 06/03/2023]
Abstract
A new approach towards the design of "gated scaffolds" based on the combination of capped mesoporous silica nanoparticles (MSNs) with porous biomaterials is reported. Using this approach, a 3D gelatin-based scaffold able to selectively deliver cargo in the presence of an APase enzyme is prepared and tested. This new design opens up the possibility of developing new smart biomaterials with advanced drug-delivery features.
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Affiliation(s)
- Núria Mas
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universitat de València-Universitat Politècnica de València and Departamento de Química, Camino de Vera s/n, 46022, Valencia, Spain and CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
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28
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Kim J, Bencherif SA, Li WA, Mooney DJ. Cell-friendly inverse opal-like hydrogels for a spatially separated co-culture system. Macromol Rapid Commun 2014; 35:1578-86. [PMID: 25113941 PMCID: PMC4318565 DOI: 10.1002/marc.201400278] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 06/18/2014] [Indexed: 02/02/2023]
Abstract
Three-dimensional macroporous scaffolds have extensively been studied for cell-based tissue engineering but their use is mostly limited to mechanical support for cell adhesion and growth on the surface of macropores. Here, a templated fabrication method is described to prepare cell-friendly inverse opal-like hydrogels (IOHs) allowing both cell encapsulation within the hydrogel matrix and cell seeding on the surface of macropores. Ionically crosslinked alginate microbeads and photocrosslinkable biocompatible polymers are used as a sacrificial template and as a matrix, respectively. The alginate microbeads are easily removed by a chelating agent, with minimal toxicity for the encapsulated cells during template removal. The outer surface of macropores in IOHs can also provide a space for cell adherence. The cells encapsulated or attached in IOHs are able to remain viable and to proliferate over time. The elastic modulus and cell-adhesion properties of IOHs can be easily controlled and tuned. Finally, it is demonstrated that IOH can be used to co-culture two distinct cell populations in different spatial positions. This cell-friendly IOH system provides a 3D scaffold for organizing different cell types in a controllable microenvironment to investigate biological processes such as stem cell niches or tumor microenvironments.
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Affiliation(s)
- Jaeyun Kim
- School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 01238. School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Sidi A. Bencherif
- School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 01238
| | - Weiwei Aileen Li
- School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 01238
| | - David J. Mooney
- School of Engineering and Applied Sciences and Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 01238
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29
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João CFC, Vasconcelos JM, Silva JC, Borges JP. An overview of inverted colloidal crystal systems for tissue engineering. TISSUE ENGINEERING PART B-REVIEWS 2014; 20:437-54. [PMID: 24328724 DOI: 10.1089/ten.teb.2013.0402] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Scaffolding is at the heart of tissue engineering but the number of techniques available for turning biomaterials into scaffolds displaying the features required for a tissue engineering application is somewhat limited. Inverted colloidal crystals (ICCs) are inverse replicas of an ordered array of monodisperse colloidal particles, which organize themselves in packed long-range crystals. The literature on ICC systems has grown enormously in the past 20 years, driven by the need to find organized macroporous structures. Although replicating the structure of packed colloidal crystals (CCs) into solid structures has produced a wide range of advanced materials (e.g., photonic crystals, catalysts, and membranes) only in recent years have ICCs been evaluated as devices for medical/pharmaceutical and tissue engineering applications. The geometry, size, pore density, and interconnectivity are features of the scaffold that strongly affect the cell environment with consequences on cell adhesion, proliferation, and differentiation. ICC scaffolds are highly geometrically ordered structures with increased porosity and connectivity, which enhances oxygen and nutrient diffusion, providing optimum cellular development. In comparison to other types of scaffolds, ICCs have three major unique features: the isotropic three-dimensional environment, comprising highly uniform and size-controllable pores, and the presence of windows connecting adjacent pores. Thus far, this is the only technique that guarantees these features with a long-range order, between a few nanometers and thousands of micrometers. In this review, we present the current development status of ICC scaffolds for tissue engineering applications.
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Affiliation(s)
- Carlos Filipe C João
- 1 CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa , Caparica, Portugal
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30
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Garg T, Goyal AK. Biomaterial-based scaffolds – current status and future directions. Expert Opin Drug Deliv 2014; 11:767-89. [DOI: 10.1517/17425247.2014.891014] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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31
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Elsner JJ, Kraitzer A, Grinberg O, Zilberman M. Highly porous drug-eluting structures: from wound dressings to stents and scaffolds for tissue regeneration. BIOMATTER 2014; 2:239-70. [PMID: 23507890 PMCID: PMC3568110 DOI: 10.4161/biom.22838] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
For many biomedical applications, there is need for porous implant materials. The current article focuses on a method for preparation of drug-eluting porous structures for various biomedical applications, based on freeze drying of inverted emulsions. This fabrication process enables the incorporation of any drug, to obtain an "active implant" that releases drugs to the surrounding tissue in a controlled desired manner. Examples for porous implants based on this technique are antibiotic-eluting mesh/matrix structures used for wound healing applications, antiproliferative drug-eluting composite fibers for stent applications and local cancer treatment, and protein-eluting films for tissue regeneration applications. In the current review we focus on these systems. We show that the release profiles of both types of drugs, water-soluble and water-insoluble, are affected by the emulsion's formulation parameters. The former's release profile is affected mainly through the emulsion stability and the resulting porous microstructure, whereas the latter's release mechanism occurs via water uptake and degradation of the host polymer. Hence, appropriate selection of the formulation parameters enables to obtain desired controllable release profile of any bioactive agent, water-soluble or water-insoluble, and also fit its physical properties to the application.
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Affiliation(s)
- Jonathan J Elsner
- Department of Biomedical Engineering, Tel-Aviv University, Tel-Aviv, Israel
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32
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Effect of Biotin and Galactose Functionalized Gelatin Nanofiber Membrane on HEp-2 Cell Attachment and Cytotoxicity. J Membr Biol 2013; 247:35-43. [DOI: 10.1007/s00232-013-9608-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 10/14/2013] [Indexed: 10/26/2022]
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33
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Shuai C, Zhuang J, Hu H, Peng S, Liu D, Liu J. In vitro bioactivity and degradability of β-tricalcium phosphate porous scaffold fabricated via selective laser sintering. Biotechnol Appl Biochem 2013; 60:266-73. [PMID: 23600577 DOI: 10.1002/bab.1064] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 11/11/2012] [Indexed: 01/19/2023]
Abstract
Porous scaffolds consisting of β-tricalcium phosphate (β-TCP) were successfully fabricated via selective laser sintering. The scaffolds had a controlled microstructure and totally interconnected porous structure. The microstructure and mechanical properties were studied. The bioactivity and degradability of scaffolds were evaluated through the simulated body fluid (SBF) cultivation experiment. The formation of a biologically active carbonate apatite layer on the surface after immersion in SBF was demonstrated using scanning electron microscope, energy dispersive X-ray, and Fourier transform infrared spectroscopy. Fast nucleation and growth of the carbonate apatite crystals were observed to occur all through the specimen surfaces. The phenomenon was explained in terms of the distribution and dispersion of inorganic phases in the scaffolds and the ionic activity products of the apatite in the SBF. The calculation results of weight loss and Ca/P molar ratio also suggest the good bioactivity and degradability of the scaffolds. These indicate that the β-TCP porous ceramic scaffold is a potential candidate scaffold for bone tissue engineering.
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Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, People's Republic of China
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34
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Fucoidan in a 3D scaffold interacts with vascular endothelial growth factor and promotes neovascularization in mice. Drug Deliv Transl Res 2013; 5:187-97. [DOI: 10.1007/s13346-013-0177-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Félix Lanao RP, Jonker AM, Wolke JG, Jansen JA, van Hest JC, Leeuwenburgh SC. Physicochemical properties and applications of poly(lactic-co-glycolic acid) for use in bone regeneration. TISSUE ENGINEERING. PART B, REVIEWS 2013; 19:380-90. [PMID: 23350707 PMCID: PMC3690090 DOI: 10.1089/ten.teb.2012.0443] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 01/11/2013] [Indexed: 11/12/2022]
Abstract
Poly(lactic-co-glycolic acid) (PLGA) is the most often used synthetic polymer within the field of bone regeneration owing to its biocompatibility and biodegradability. As a consequence, a large number of medical devices comprising PLGA have been approved for clinical use in humans by the American Food and Drug Administration. As compared with the homopolymers of lactic acid poly(lactic acid) and poly(glycolic acid), the co-polymer PLGA is much more versatile with regard to the control over degradation rate. As a material for bone regeneration, the use of PLGA has been extensively studied for application and is included as either scaffolds, coatings, fibers, or micro- and nanospheres to meet various clinical requirements.
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Affiliation(s)
- Rosa P. Félix Lanao
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Anika M. Jonker
- Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Joop G.C. Wolke
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - John A. Jansen
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Jan C.M. van Hest
- Institute for Molecules and Materials, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Sander C.G. Leeuwenburgh
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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Liu D, Zhuang J, Shuai C, Peng S. Mechanical properties' improvement of a tricalcium phosphate scaffold with poly-l-lactic acid in selective laser sintering. Biofabrication 2013; 5:025005. [DOI: 10.1088/1758-5082/5/2/025005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Luo Y, Lode A, Sonntag F, Nies B, Gelinsky M. Well-ordered biphasic calcium phosphate–alginate scaffolds fabricated by multi-channel 3D plotting under mild conditions. J Mater Chem B 2013; 1:4088-4098. [DOI: 10.1039/c3tb20511h] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Mondal D, So-Ra S, Sarkar SK, Min YK, Yang HM, Lee BT. Fabrication of multilayer ZrO₂-biphasic calcium phosphate-poly-caprolactone unidirectional channeled scaffold for bone tissue formation. J Biomater Appl 2012; 28:462-72. [PMID: 23064831 DOI: 10.1177/0885328212462046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We developed a continuously porous scaffold with laminated matrix and bone-like microstructure by a multi-pass extrusion process. In this scaffold, tetragonal ZrO₂, biphasic calcium phosphate and poly-caprolactone layers were arranged in a co-axially laminated unit cell with a channel in the center. The entire matrix phase had a laminated microstructure of alternate lamina of tetragonal ZrO₂, biphasic calcium phosphate and poly-caprolactone--biphasic calcium phosphate with optimized designed thickness and channeled porosity. Each of the continuous pores was coaxially encircled by the poly-caprolactone--biphasic calcium phosphate layer, biphasic calcium phosphate layer and finally tetragonal ZrO₂ layer, one after the other. Before extrusion, 5 vol% graphite powder was mixed with tetragonal ZrO₂ to ensure pores in the outer layer and connectivity among the lamellas. The design strategy is aimed to incorporate a lamellar microstructure like the natural bone in the macro-scaled ceramic body to investigate the strengthening phenomenon and pave the way for fabricating complex microstructure of natural bone could be applied for whole bone replacement. The final fabricated scaffold had a compressive strength of 12.7 MPa and porosity of 78 vol% with excellent cell viability, cell attachment and osteocalcin and collagen expression from cultured MG63 cells on scaffold.
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Affiliation(s)
- Dibakar Mondal
- Department of Biomedical Engineering and Materials, College of Medicine, Soonchunhyang University, Cheonan, Republic of Korea
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Vo TN, Kasper FK, Mikos AG. Strategies for controlled delivery of growth factors and cells for bone regeneration. Adv Drug Deliv Rev 2012; 64:1292-309. [PMID: 22342771 PMCID: PMC3358582 DOI: 10.1016/j.addr.2012.01.016] [Citation(s) in RCA: 430] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 01/23/2012] [Accepted: 01/30/2012] [Indexed: 12/15/2022]
Abstract
The controlled delivery of growth factors and cells within biomaterial carriers can enhance and accelerate functional bone formation. The carrier system can be designed with pre-programmed release kinetics to deliver bioactive molecules in a localized, spatiotemporal manner most similar to the natural wound healing process. The carrier can also act as an extracellular matrix-mimicking substrate for promoting osteoprogenitor cellular infiltration and proliferation for integrative tissue repair. This review discusses the role of various regenerative factors involved in bone healing and their appropriate combinations with different delivery systems for augmenting bone regeneration. The general requirements of protein, cell and gene therapy are described, with elaboration on how the selection of materials, configurations and processing affects growth factor and cell delivery and regenerative efficacy in both in vitro and in vivo applications for bone tissue engineering.
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Affiliation(s)
- Tiffany N. Vo
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
| | - F. Kurtis Kasper
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
| | - Antonios G. Mikos
- Department of Bioengineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
- Department of Chemical and Biomolecular Engineering, Rice University, P.O. Box 1892, MS 142, Houston, TX 77251-1892, USA
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41
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Su J, Cao L, Yu B, Song S, Liu X, Wang Z, Li M. Composite scaffolds of mesoporous bioactive glass and polyamide for bone repair. Int J Nanomedicine 2012; 7:2547-55. [PMID: 22679367 PMCID: PMC3367494 DOI: 10.2147/ijn.s29819] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A bone-implanted porous scaffold of mesoporous bioglass/polyamide composite (m-BPC) was fabricated, and its biological properties were investigated. The results indicate that the m-BPC scaffold contained open and interconnected macropores ranging 400-500 μm, and exhibited a porosity of 76%. The attachment ratio of MG-63 cells on m-BPC was higher than polyamide scaffolds at 4 hours, and the cells with normal phenotype extended well when cultured with m-BPC and polyamide scaffolds. When the m-BPC scaffolds were implanted into bone defects of rabbit thighbone, histological evaluation confirmed that the m-BPC scaffolds exhibited excellent biocompatibility and osteoconductivity, and more effective osteogenesis than the polyamide scaffolds in vivo. The results indicate that the m-BPC scaffolds improved the efficiency of new bone regeneration and, thus, have clinical potential for bone repair.
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Affiliation(s)
- Jiacan Su
- Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai, China.
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42
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Ju M, Shen L, Gong F, Gao Y, Zhang W. Synthesis and characterization of new biodegradable comb-dendritic triblock copolymers. POLYM INT 2012. [DOI: 10.1002/pi.4231] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Emans PJ, Jansen EJP, van Iersel D, Welting TJM, Woodfield TBF, Bulstra SK, Riesle J, van Rhijn LW, Kuijer R. Tissue-engineered constructs: the effect of scaffold architecture in osteochondral repair. J Tissue Eng Regen Med 2012; 7:751-6. [PMID: 22438217 DOI: 10.1002/term.1477] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 07/17/2011] [Accepted: 01/17/2012] [Indexed: 11/08/2022]
Abstract
Cartilage has a poor regenerative capacity. Tissue-engineering approaches using porous scaffolds seeded with chondrocytes may improve cartilage repair. The aim of this study was to examine the effect of pore size and pore interconnectivity on cartilage repair in osteochondral defects treated with different scaffolds seeded with allogenic chondrocytes. Scaffolds consisting of 55 wt% poly(ethylene oxide terephthalate) and 45 wt% poly(butylene terephthalate) (PEOT/PBT) with different pore sizes and interconnectivities were made, using a compression moulding (CM) and a three-dimensional fibre (3DF) deposition technique. In these scaffolds, allogenic chondrocytes were seeded, cultured for 3 weeks and implanted in osteochondral defects of skeletally mature rabbits. At 3 weeks no difference in cartilage repair between an empty osteochondral defect, CM or 3DF scaffolds was found. Three months post-implantation, cartilage repair was significantly improved after implantation of a 3DF scaffold compared to a CM scaffold. Although not significant, Mankin scores for osteoarthritis (OA) indicated less OA in the 3DF scaffold group compared to empty defects and CM-treated defects. It is concluded that scaffold pore size and pore interconnectivity influences osteochondral repair and a decreased pore interconnectivity seems to impair osteochondral repair.
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Affiliation(s)
- P J Emans
- Department of Orthopaedic Surgery, Maastricht University Medical Centre, The Netherlands.
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Davis HE, Case EM, Miller SL, Genetos DC, Leach JK. Osteogenic response to BMP-2 of hMSCs grown on apatite-coated scaffolds. Biotechnol Bioeng 2011; 108:2727-35. [PMID: 21656707 PMCID: PMC3178749 DOI: 10.1002/bit.23227] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 05/31/2011] [Accepted: 06/02/2011] [Indexed: 11/10/2022]
Abstract
Osteoconductive materials play a critical role in promoting integration with surrounding bone tissue and resultant bone repair in vivo. However, the impact of 3D osteoconductive substrates coupled with soluble signals on progenitor cell differentiation is not clear. In this study, we investigated the influence of bone morphogenetic protein-2 (BMP-2) concentration on the osteogenic differentiation of human mesenchymal stem cells (hMSCs) when seeded in carbonated apatite-coated polymer scaffolds. Mineralized scaffolds were more hydrophilic and adsorbed more BMP-2 compared to non-mineralized scaffolds. Changes in alkaline phosphatase (ALP) activity within stimulated hMSCs were dependent on the dose of BMP-2 and the scaffold composition. We detected more cell-secreted calcium on mineralized scaffolds at all time points, and higher BMP-2 concentrations resulted in increased ALP and calcium levels. RUNX2 and IBSP gene expression within hMSCs was affected by both substrate and soluble signals, SP7 by soluble factors, and SPARC by substrate-mediated cues. The present data indicate that a combination of apatite and BMP-2 do not simply enhance the osteogenic response of hMSCs, but act through multiple pathways that may be both substrate- and growth factor-mediated. Thus, multiple signaling strategies will likely be necessary to achieve optimal bone regeneration.
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Affiliation(s)
| | - Erin M. Case
- Department of Biomedical Engineering, UC Davis, Davis, CA 95616
| | | | | | - J. Kent Leach
- Department of Biomedical Engineering, UC Davis, Davis, CA 95616
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Bettahalli N, Vicente J, Moroni L, Higuera G, van Blitterswijk C, Wessling M, Stamatialis D. Integration of hollow fiber membranes improves nutrient supply in three-dimensional tissue constructs. Acta Biomater 2011; 7:3312-24. [PMID: 21704736 DOI: 10.1016/j.actbio.2011.06.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 05/20/2011] [Accepted: 06/08/2011] [Indexed: 10/18/2022]
Abstract
Sufficient nutrient and oxygen transport is a potent modulator of cell proliferation in in vitro tissue-engineered constructs. The lack of oxygen and culture medium can create a potentially lethal environment and limit cellular metabolic activity and growth. Diffusion through scaffold and multi-cellular tissue typically limits transport in vitro, leading to potential hypoxic regions and reduction in the viable tissue thickness. For the in vitro generation of clinically relevant tissue-engineered grafts, current nutrient diffusion limitations should be addressed. Major approaches to overcoming these include culture with bioreactors, scaffolds with artificial microvasculature, oxygen carriers and pre-vascularization of the engineered tissues. This study focuses on the development and utilization of a new perfusion culture system to provide adequate nutrient delivery to cells within large three-dimensional (3D) scaffolds. Perfusion of oxygenated culture medium through porous hollow fiber (HF) integrated within 3D free form fabricated (FFF) scaffolds is proposed. Mouse pre-myoblast (C2C12) cells cultured on scaffolds of poly(ethylene-oxide-terephthalate)-poly(butylene-terephthalate) block copolymer (300PEOT55PBT45) integrated with porous HF membranes of modified poly(ether-sulfone) (mPES, Gambro GmbH) is used as a model system. Various parameters such as fiber transport properties, fiber spacing within a scaffold and medium flow conditions are optimized. The results show that four HF membranes integrated with the scaffold significantly improve the cell density and cell distribution. This study provides a basis for the development of a new HF perfusion culture methodology to overcome the limitations of nutrient diffusion in the culture of large 3D tissue constructs.
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Guarino V, Guaccio A, Guarnieri D, Netti PA, Ambrosio L. Binary system thermodynamics to control pore architecture of PCL scaffold via temperature-driven phase separation process. J Biomater Appl 2011; 27:241-54. [DOI: 10.1177/0885328211401056] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The use of scaffold-aided strategies for the regeneration of biological tissues requires the fulfilment of an accurate architectural design, that is, micro and macrostructure, with the final goal of realizing architectures to adopt as guidance for those cell activities specific to the formation of novel tissues. Here, highly porous scaffolds made up of biodegradable poly(ε-caprolactone) (PCL) have been realized by thermally induced phase separation (TIPS). Two different polymer/solvent systems, derived by the dissolution of PCL in dioxane and DMSO respectively, were investigated. The aim was to demonstrate the high potential of TIPS technique, in imprinting specific pore features to the polymer matrices, by a conscious selection of polymer/solvent systems. The investigation of pore architecture by SEM/mercury intrusion porosimetry/image analyses, firstly allow to detect remarkable variations in porosity (from 92% to 78%,) and pore sizes, ranging from micro-scale ( ca 10 µm) to macro-scale (greater than 100 µm) as a function of the used polymer/solvent systems. Moreover, experimental and theoretical evidences referred to scaffold shaped in custom-made molds – a thin Teflon ring between two copper plates – allow exploring how the sensitivity of polymer solution features (i.e., crystallinity, thermal inertia) to the cooling temperature can affect the alignment of polymer phases and, ultimately, scaffold pore anisotropy. Analytical results supported by preliminary biological studies demonstrate the higher ability of PCL/dioxane solution to promote the formation of aligned pores which provide a morphological guidance to cell advance during the preliminary stage of culture. These findings, taken as a whole, put the basis for a better informed regeneration of structurally complex tissues based on the modeling of scaffold micro and macro-architecture by thermodynamic forces.
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Affiliation(s)
- Vincenzo Guarino
- Institute of Composite and Biomedical Materials, National Research Council of Italy (IMCB/CNR), Piazzale Tecchio 80 Napoli, Italy
| | - Angela Guaccio
- Interdisciplinary Research Centre on Biomaterials CRIB, University of Naples, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Daniela Guarnieri
- Interdisciplinary Research Centre on Biomaterials CRIB, University of Naples, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Paolo A Netti
- Interdisciplinary Research Centre on Biomaterials CRIB, University of Naples, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Luigi Ambrosio
- Institute of Composite and Biomedical Materials, National Research Council of Italy (IMCB/CNR), Piazzale Tecchio 80 Napoli, Italy
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Im GI, Kim HJ, Lee JH. Chondrogenesis of adipose stem cells in a porous PLGA scaffold impregnated with plasmid DNA containing SOX trio (SOX-5,-6 and -9) genes. Biomaterials 2011; 32:4385-92. [PMID: 21421267 DOI: 10.1016/j.biomaterials.2011.02.054] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 02/27/2011] [Indexed: 01/27/2023]
Abstract
We developed a chondrogenic scaffold system in which plasmid DNA (pDNA) containing SOX trio (SOX-5, -6, and -9) genes was incorporated into a PLGA scaffold and slowly released to transfect adipose stem cells (ASCs) seeded in the scaffold. The purpose of this study was to test the in vitro and in vivo efficacy of the system to induce chondrogenic differentiation of ASCs. The pDNA/PEI-PEG complex-incorporated PLGA/Pluronic F127 porous scaffolds were fabricated by a precipitation/particulate leaching method. The following five kinds of pDNA were incorporated into the scaffolds: 1) pECFP-C1 vector without an interposed gene (control group); 2) SOX-5 plasmids; 3) SOX-6 plasmids; 4) SOX-9 plasmids; and 5) one-third doses of each plasmid (SOX-5, -6, and -9). ASCs were seeded on pDNA-incorporated PLGA scaffolds and cultured in chondrogenic media for 21 days. ASCs were also isolated from rabbits, seeded in pDNA-incorporated PLGA scaffolds, and then implanted in the osteochondral defect created on the patellar groove. The rabbits were sacrificed and analyzed grossly and microscopically 8 weeks after implantation. The percentage of transfected cells was highest on day 14, around 70%. After 21 days, PLGA scaffolds incorporated with each gene showed markedly increased expression of the corresponding gene and protein. Glycosaminoglycan (GAG) assay and Safranin-O staining showed an increased proteoglycan production in SOX trio pDNA-incorporated scaffolds. The COL2A1 gene and protein were notably increased in SOX trio pDNA-incorporated scaffolds than in the control, while COL10A1 protein expression decreased. Gross and histological findings from the in vivo study showed enhanced cartilage regeneration in ASCs/SOX trio pDNA-incorporated PLGA scaffolds.
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Affiliation(s)
- Gun-Il Im
- Department of Orthopaedics, Dongguk University Ilsan Hospital, Siksa-Dong, Goyang, Republic of Korea.
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48
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Hu J, Ma PX. Nano-fibrous tissue engineering scaffolds capable of growth factor delivery. Pharm Res 2011; 28:1273-81. [PMID: 21234657 DOI: 10.1007/s11095-011-0367-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 01/06/2011] [Indexed: 01/18/2023]
Abstract
Tissue engineering aims at constructing biological substitutes to repair damaged tissues. Three-dimensional (3D) porous scaffolds are commonly utilized to define the 3D geometry of tissue engineering constructs and provide adequate pore space and surface to support cell attachment, migration, proliferation, differentiation and neo tissue genesis. Biomimetic 3D scaffolds provide synthetic microenvironments that mimic the natural regeneration microenvironments and promote tissue regeneration process. While nano-fibrous (NF) scaffolds are constructed to mimic the architecture of NF extracellular matrix, controlled-release growth factors are incorporated to modulate the regeneration process. The present article summarizes current advances in methods to fabricate NF polymer scaffolds and the technologies to incorporate controlled growth factor delivery systems into 3D scaffolds, followed by examples of accelerated regeneration when the scaffolds with growth factor releasing capacity are applied in animal models.
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Affiliation(s)
- Jiang Hu
- Department of Biologic and Materials Sciences, The University of Michigan, 1011 North University Ave, Room 2211, Ann Arbor, Michigan 48109-1078, USA
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49
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Li S, Chen X, Li M. EFFECT OF SOME FACTORS ON FABRICATION OF POLY(L-LACTIC ACID) MICROPOROUS FOAMS BY THERMALLY INDUCED PHASE SEPARATION USINGN,N-DIMETHYLACETAMIDE AS SOLVENT. Prep Biochem Biotechnol 2010; 41:53-72. [DOI: 10.1080/10826068.2010.534222] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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50
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Liu JJ, Wang CY, Wang JG, Ruan HJ, Fan CY. Peripheral nerve regeneration using composite poly(lactic acid-caprolactone)/nerve growth factor conduits prepared by coaxial electrospinning. J Biomed Mater Res A 2010; 96:13-20. [PMID: 20949481 DOI: 10.1002/jbm.a.32946] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Revised: 07/28/2010] [Accepted: 07/29/2010] [Indexed: 11/06/2022]
Abstract
Many neurotrophic factors have been shown to promote neurite outgrowth by improving the microenvironment that is required for nerve regeneration. However, the delivery of these bioactive agents to the nerve injury site, as well as effective and local release, remains a challenging problem. We have developed a novel composite nerve conduit comprised of poly(lactic acid-caprolactone) (P(LLA-CL)) and nerve growth factor (NGF). This was developed from core-shell structured biodegradable nanofibers, which were fabricated by coaxial electrospinning of P(LLA-CL) for the shell and bovine serum albumin (BSA) or BSA/NGF for the core. In rats, gaps of 10-mm long sciatic nerves were bridged using an autograft, an empty P(LLA-CL) conduit, a NGF injection P(LLA-CL) conduit, a P(LLA-CL)/NGF composite conduit, respectively. Regenerated nerve fibers were harvested and morphological and functional evaluation of nerve regeneration was performed at 12 weeks postsurgery. Although partial biodegradation and small cracks in the conduits were observed, the conduit outlines remained intact for 12 weeks after surgery. Based on functional and histological observations, the number and arrangement of regenerated nerve fibers, myelination, and nerve function reconstruction was similar in the P(LLA-CL)/NGF conduit group to that of the nerve autograft group (p > 0.05), but was significantly greater to the empty P(LLA-CL) and injection NGF P(LLA-CL) conduit groups (both p < 0.05). Therefore, the composite P(LLA-CL)/NGF conduit, which exhibited favorable mechanical properties and biocompatibility, could effectively promote sciatic nerve regeneration in rats.
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Affiliation(s)
- Jun-Jian Liu
- Department of Orthopedic Surgery, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
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