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Nain A, Chakraborty S, Barman SR, Gavit P, Indrakumar S, Agrawal A, Lin ZH, Chatterjee K. Progress in the development of piezoelectric biomaterials for tissue remodeling. Biomaterials 2024; 307:122528. [PMID: 38522326 DOI: 10.1016/j.biomaterials.2024.122528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/15/2024] [Accepted: 03/08/2024] [Indexed: 03/26/2024]
Abstract
Piezoelectric biomaterials have demonstrated significant potential in the past few decades to heal damaged tissue and restore cellular functionalities. Herein, we discuss the role of bioelectricity in tissue remodeling and explore ways to mimic such tissue-like properties in synthetic biomaterials. In the past decade, biomedical engineers have adopted emerging functional biomaterials-based tissue engineering approaches using innovative bioelectronic stimulation protocols based on dynamic stimuli to direct cellular activation, proliferation, and differentiation on engineered biomaterial constructs. The primary focus of this review is to discuss the concepts of piezoelectric energy harvesting, piezoelectric materials, and their application in soft (skin and neural) and hard (dental and bone) tissue regeneration. While discussing the prospective applications as an engineered tissue, an important distinction has been made between piezoceramics, piezopolymers, and their composites. The superiority of piezopolymers over piezoceramics to circumvent issues such as stiffness mismatch, biocompatibility, and biodegradability are highlighted. We aim to provide a comprehensive review of the field and identify opportunities for the future to develop clinically relevant and state-of-the-art biomaterials for personalized and remote health care.
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Affiliation(s)
- Amit Nain
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India.
| | - Srishti Chakraborty
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Snigdha Roy Barman
- Department of Bioengineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Pratik Gavit
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India; School of Bio Science and Technology, Vellore Institute of Technology, Vellore, 632014, India
| | - Sushma Indrakumar
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Akhilesh Agrawal
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Zong-Hong Lin
- Department of Biomedical Engineering, National Taiwan University, Taipe, 10617, Taiwan.
| | - Kaushik Chatterjee
- Department of Material Engineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India; Department of Bioengineering, Indian Institute of Science, Bangalore, 560012, Karnataka, India.
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Celen MC, Akkoca A, Tuncer S, Dalkilic N, Ilhan B. Protective vs. Therapeutic Effects of Mitochondria-Targeted Antioxidant MitoTEMPO on Rat Sciatic Nerve Crush Injury: A Comprehensive Electrophysiological Analysis. Biomedicines 2023; 11:3306. [PMID: 38137528 PMCID: PMC10741406 DOI: 10.3390/biomedicines11123306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/08/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Protective vs. Therapeutic Effects of Mitochondria-Targeted Antioxidant MitoTEMPO on Rat Sciatic Nerve Crush Injury: A Comprehensive Electrophysiological Analysis. Peripheral nerve injuries often result in long-lasting functional deficits, prompting the need for effective interventions. MitoTEMPO (2-(2,2,6,6-tetramethylpiperidin-1-oxyl-4-ylamino)-2-oxoethyl) triphenylphosphonium chloride) is a mitochondria-targeted antioxidant that has shown protective and therapeutic effects against pathologies associated with reactive oxygen species. This study explores the utilization of MitoTEMPO as a therapeutic and protective agent for sciatic nerve crush injuries. By employing advanced mathematical approaches, the study seeks to comprehensively analyze nerve conduction parameters, nerve excitability, and the distribution of nerve conduction velocities to gauge the potential. Forty Wistar-Albino rats were randomly divided into following groups: (I) SHAM-animals subjected to sham operation and treated intraperitoneally (i.p.) with vehicle (bidistilled water) for 14 days; (II) CI (crush injury)-animals subjected to CI and treated with vehicle 14 days; (III) MiP-animals subjected to 7 days i.p. MitoTEMPO treatment before CI (0.7 mg/kg/day dissolved in vehicle) and, only vehicle for 7 days after CI, protective MitoTEMPO; and (IV) MiT-animals i.p. treated with only vehicle for 7 days before CI and 7 days with MitoTEMPO (0.7 mg/kg/day dissolved in vehicle) after CI, therapeutic MitoTEMPO. Nerve excitability parameters were measured, including rheobase and chronaxie, along with compound action potential (CAP) recordings. Advanced mathematical analyses were applied to CAP recordings to determine nerve conduction velocities and distribution patterns. The study revealed significant differences in nerve excitability parameters between groups. Nerve conduction velocity was notably reduced in the MiP and CI groups, whereas CAP area values were diminished in the MiP and CI groups compared to the MiT group. Furthermore, CAP velocity was lower in the MiP and CI groups, and maximum depolarization values were markedly lower in the MiP and CI groups compared to the SHAM group. The distribution of nerve conduction velocities indicated alterations in the composition of nerve fiber groups following crush injuries. In conclusion, postoperative MitoTEMPO administration demonstrated promising results in mitigating the detrimental effects of nerve crush injuries.
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Affiliation(s)
- Murat Cenk Celen
- Department of Biophysics, Faculty of Medicine, Ankara Medipol University, 06570 Ankara, Türkiye
| | - Ahmet Akkoca
- Department of Occupational Health and Safety, Taskent Vocational School, Selcuk University, 42960 Konya, Türkiye
| | - Seckin Tuncer
- Department of Biophysics, Faculty of Medicine, Eskisehir Osmangazi University, 26040 Eskisehir, Türkiye
| | - Nizamettin Dalkilic
- Department of Biophysics, Faculty of Medicine, Baskent University, 06490 Ankara, Türkiye
| | - Barkin Ilhan
- Department of Biophysics, Meram School of Medicine, Necmettin Erbakan University, 42090 Konya, Türkiye
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Kadoya K, Hara ES, Okada M, Jiao YY, Nakano T, Sasaki A, Matsumoto T. Fabrication of initial trabecular bone-inspired three-dimensional structure with cell membrane nano fragments. Regen Biomater 2022; 10:rbac088. [PMID: 36683756 PMCID: PMC9845518 DOI: 10.1093/rb/rbac088] [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: 06/02/2022] [Revised: 10/07/2022] [Accepted: 10/22/2022] [Indexed: 01/19/2023] Open
Abstract
The extracellular matrix of trabecular bone has a large surface exposed to the bone marrow and plays important roles such as hematopoietic stem cell niche formation and maintenance. In vitro reproduction of trabecular bone microenvironment would be valuable not only for developing a functional scaffold for bone marrow tissue engineering but also for understanding its biological functions. Herein, we analyzed and reproduced the initial stages of trabecular bone formation in mouse femur epiphysis. We identified that the trabecular bone formation progressed through the following steps: (i) partial rupture of hypertrophic chondrocytes; (ii) calcospherite formation on cell membrane nano fragments (CNFs) derived from the ruptured cells; and (iii) calcospherite growth and fusion to form the initial three-dimensional (3D) structure of trabecular bones. For reproducing the initial trabecular bone formation in vitro, we collected CNFs from cultured cells and used as nucleation sites for biomimetic calcospherite formation. Strikingly, almost the same 3D structure of the initial trabecular bone could be obtained in vitro by using additional CNFs as a binder to fuse biomimetic calcospherites.
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Affiliation(s)
- Koichi Kadoya
- Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan,Department of Maxillofacial Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Emilio Satoshi Hara
- Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Masahiro Okada
- Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Yu Yang Jiao
- Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Takayoshi Nakano
- Division of Materials & Manufacturing Science, Osaka University, Osaka 565-0871, Japan
| | - Akira Sasaki
- Department of Maxillofacial Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
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Almutairi M, Srinivasan P, Zhang P, Austin F, Butreddy A, Alharbi M, Bandari S, Ashour EA, Repka MA. Hot-Melt Extrusion Coupled with Pressurized Carbon Dioxide for Enhanced Processability of Pharmaceutical Polymers and Drug Delivery Applications – An Integrated Review. Int J Pharm 2022; 629:122291. [DOI: 10.1016/j.ijpharm.2022.122291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/28/2022] [Accepted: 10/09/2022] [Indexed: 11/07/2022]
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Shabanloo R, Akbari S, Mirsalehi M. Hybrid electrospun scaffolds based on polylactic acid/ PAMAM dendrimer/gemini surfactant for enhancement of synergistic antibacterial ability for biomedical application. Biomed Mater 2022; 17. [PMID: 35487203 DOI: 10.1088/1748-605x/ac6bd7] [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: 10/31/2021] [Accepted: 04/29/2022] [Indexed: 11/11/2022]
Abstract
Hybrid electrospun scaffolds based on poly (L-lactic acid) (PLLA) / poly (amidoamine) (PAMAM-G2) dendrimer / gemini surfactant were fabricated for the enhancement of synergistic antibacterial activities. The second generation of poly (amidoamine) (PAMAM-G2) and cationic gemini surfactant were utilized to functionalize the optimum electrospun scaffolds. The gelatination process was utilized to improve the wettability of PLLA scaffolds to extend cell attachment and cell proliferation. PLLA nanofibrous scaffolds were characterized by energy dispersion X-ray (EDX), Scanning electron microscopy (SEM) images, mechanical properties, water contact angle, Fourier transform infrared (FTIR) spectroscopy, zeta potential and antibacterial assessment. In vitro cell biocompatibility was evaluated by MTT assay and morphology of PC-12 cells cultured on hybrid nanofibrous scaffolds and gelatinized ones. The results indicated that the optimum scaffolds could successfully modify the characteristics of PLLA scaffolds leading to much more appropriate physical and chemical properties. In addition, gelatinized nanofibrous scaffolds reveal more wettability enhancing cell attachment and proliferation. Furthermore, using poly (amidoamine) (PAMAM-G2) and gemini surfactant reveals synergetic antibacterial activity due to the competition between both cationic groups of PAMAM and gemini surfactant. Finally, improved cell adhesion and cell viability on modified scaffolds were confirmed. These favorable properties give a chance for these scaffolds to be used in a wide variety of biomedical applications.
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Affiliation(s)
- Rasool Shabanloo
- Textile engineering, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, Iran 1591634311, Tehran, 1591634311, Iran (the Islamic Republic of)
| | - Somaye Akbari
- Department of Textile Engineering, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, Iran 1591634311, Tehran, Tehran, 1591634311, Iran (the Islamic Republic of)
| | - Marjan Mirsalehi
- Iran University of Medical Sciences, Iran University of Medical Sciences Shahid Hemmat Highway Tehran 14496-14535, IRAN, Tehran, Tehran, 1449614535, Iran (the Islamic Republic of)
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Liu K, Yan L, Li R, Song Z, Ding J, Liu B, Chen X. 3D Printed Personalized Nerve Guide Conduits for Precision Repair of Peripheral Nerve Defects. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103875. [PMID: 35182046 PMCID: PMC9036027 DOI: 10.1002/advs.202103875] [Citation(s) in RCA: 53] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 12/25/2021] [Indexed: 05/07/2023]
Abstract
The treatment of peripheral nerve defects has always been one of the most challenging clinical practices in neurosurgery. Currently, nerve autograft is the preferred treatment modality for peripheral nerve defects, while the therapy is constantly plagued by the limited donor, loss of donor function, formation of neuroma, nerve distortion or dislocation, and nerve diameter mismatch. To address these clinical issues, the emerged nerve guide conduits (NGCs) are expected to offer effective platforms to repair peripheral nerve defects, especially those with large or complex topological structures. Up to now, numerous technologies are developed for preparing diverse NGCs, such as solvent casting, gas foaming, phase separation, freeze-drying, melt molding, electrospinning, and three-dimensional (3D) printing. 3D printing shows great potential and advantages because it can quickly and accurately manufacture the required NGCs from various natural and synthetic materials. This review introduces the application of personalized 3D printed NGCs for the precision repair of peripheral nerve defects and predicts their future directions.
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Affiliation(s)
- Kai Liu
- Department of Hand and Foot SurgeryThe First Hospital of Jilin University1 Xinmin StreetChangchun130061P. R. China
- Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022P. R. China
| | - Lesan Yan
- Biomedical Materials and Engineering Research Center of Hubei ProvinceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology122 Luoshi RoadWuhan430070P. R. China
| | - Ruotao Li
- Department of Hand and Foot SurgeryThe First Hospital of Jilin University1 Xinmin StreetChangchun130061P. R. China
- Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022P. R. China
| | - Zhiming Song
- Department of Sports MedicineThe First Hospital of Jilin University1 Xinmin StreetChangchun130061P. R. China
| | - Jianxun Ding
- Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022P. R. China
- State Key Laboratory of Molecular Engineering of PolymersFudan University220 Handan RoadShanghai200433P. R. China
| | - Bin Liu
- Department of Hand and Foot SurgeryThe First Hospital of Jilin University1 Xinmin StreetChangchun130061P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer EcomaterialsChangchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022P. R. China
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Maturavongsadit P, Paravyan G, Kovarova M, Garcia JV, Benhabbour SR. A new engineering process of biodegradable polymeric solid implants for ultra-long-acting drug delivery. Int J Pharm X 2021; 3:100068. [PMID: 33392498 PMCID: PMC7773589 DOI: 10.1016/j.ijpx.2020.100068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
We present a long-acting (LA) biodegradable polymeric solid implant (PSI) fabricated using a new process combining in-situ phase inversion and compression. This robust process allows fabrication of solid implants that can have different shapes and sizes, accommodate high drug payloads, and provide sustained drug release over several months. Herein the integrase inhibitor dolutegravir (DTG) was used to develop PSIs for HIV prevention. PSIs were fabricated using a three-step process by (a) phase inversion of DTG-loaded polymer solution to form an initial in-situ forming implant in an aqueous solution, (b) micronization of dried DTG-loaded solid implants, and (c) compression of the micronized DTG-loaded solid implants to form the PSI. High drug loading (up to 85 wt%) was achieved in the PSIs. DTG exhibited minimum burst release in the first 24 h (<6%) and sustained release kinetics over 6 months. The release kinetics of DTG can be fine-tuned by varying drug-loading concentration, the ratio of polymer (poly(lactic-co-glycolic acid), PLGA) to solvent (N-methyl-2-pyrrolidone, NMP) and polymer (PLGA) molecular weight in the precursor solution. The physical/chemical properties of DTG were retained post-storage under accelerated storage conditions (40 °C/75% relative humidity) for 6 months. The versatility of this technology makes it an attractive drug delivery platform for HIV prevention applications.
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Affiliation(s)
- Panita Maturavongsadit
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Gayane Paravyan
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Martina Kovarova
- International Center for the Advancement of Translational Science, USA
- Division of Infectious Diseases, Center for Aids Research, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - J. Victor Garcia
- International Center for the Advancement of Translational Science, USA
- Division of Infectious Diseases, Center for Aids Research, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - S. Rahima Benhabbour
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Division of Pharmacoengineering and Molecular Pharmaceutics, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Kaur H, Kesharwani P. Advanced nanomedicine approaches applied for treatment of skin carcinoma. J Control Release 2021; 337:589-611. [PMID: 34364919 DOI: 10.1016/j.jconrel.2021.08.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/31/2021] [Accepted: 08/02/2021] [Indexed: 12/12/2022]
Abstract
Skin-cancer is the commonest malignancy affecting huge proportion of the population, reaching heights in terms of morbidity. The treatment strategies are presently focusing on surgery, radiation and chemotherapy, which eventually cause destruction to unaffected cells. To overcome this limitation, wide range of nanoscaled materials have been recognized as potential carriers for delivering selective response to cancerous cells and neoplasms. Nanotechnological approach has been tremendously exploited in several areas, owing to their functional nanometric dimensions. The alarming incidence of skin cancer engenders burdensome effects worldwide, which is further awakening innovational medicinal approaches, accompanying target specific drug delivery tools for coveted benefits to provide reduced toxicity and tackle proliferative episodes of skin cancer. The developed nanosystems for anti-cancer agents include liposomes, ethosomes, nanofibers, solid lipid nanoparticles and metallic nanoparticles, which exhibit pronounced outcomes for skin carcinoma. In this review, skin cancer with its sub-types is explained in nutshell, followed by compendium of specific nanotechnological tools presented, in addition to therapeutic applications of drug-loaded nano systems for skin cancer.
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Affiliation(s)
- Harsimran Kaur
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, New Delhi 110017, India
| | - Prashant Kesharwani
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India.
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Ma Y, Gao H, Wang H, Cao X. Engineering topography: effects on nerve cell behaviors and applications in peripheral nerve repair. J Mater Chem B 2021; 9:6310-6325. [PMID: 34302164 DOI: 10.1039/d1tb00782c] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There have been extensive studies on the application of topography in the field of tissue repair. A common feature of these studies is that the existence of topological structures in tissue repair scaffolds can effectively regulate a series of behaviors of cells and play a positive role in a variety of tissue repair and regeneration processes. This review focuses on the application of topography in the field of peripheral nerve repair. The integration of the topological structure and biomaterials to construct peripheral nerve conduits to mimic a natural peripheral nerve structure has an important role in promoting the recovery of peripheral nerve function. Therefore, in this review, we systematically analysed the structure of peripheral nerves and summarized the effects of topographic cues of different scales and shapes on the behaviors of nerve cells, including cell morphology, adhesion, proliferation, migration and differentiation. Furthermore, the application and performance of scaffolds with different topological structures in peripheral nerve repair are also discussed. This systematic summary may help to provide more effective strategies for peripheral nerve regeneration (PNR) and shed light on nervous tissue engineering and regenerative medicine.
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Affiliation(s)
- Ying Ma
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, P. R. China.
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Yoo MC, Chon J, Jung J, Kim SS, Bae S, Kim SH, Yeo SG. Potential Therapeutic Strategies and Substances for Facial Nerve Regeneration Based on Preclinical Studies. Int J Mol Sci 2021; 22:ijms22094926. [PMID: 34066483 PMCID: PMC8124575 DOI: 10.3390/ijms22094926] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/23/2021] [Accepted: 04/27/2021] [Indexed: 12/14/2022] Open
Abstract
Despite advances in microsurgical technology and an improved understanding of nerve regeneration, obtaining satisfactory results after facial nerve injury remains a difficult clinical problem. Among existing peripheral nerve regeneration studies, relatively few have focused on the facial nerve, particularly how experimental studies of the facial nerve using animal models play an essential role in understanding functional outcomes and how such studies can lead to improved axon regeneration after nerve injury. The purpose of this article is to review current perspectives on strategies for applying potential therapeutic methods for facial nerve regeneration. To this end, we searched Embase, PubMed, and the Cochrane library using keywords, and after applying exclusion criteria, obtained a total of 31 qualifying experimental studies. We then summarize the fundamental experimental studies on facial nerve regeneration, highlighting recent bioengineering studies employing various strategies for supporting facial nerve regeneration, including nerve conduits with stem cells, neurotrophic factors, and/or other therapeutics. Our summary of the methods and results of these previous reports reveal a common feature among studies, showing that various neurotrophic factors arising from injured nerves contribute to a microenvironment that plays an important role in functional recovery. In most cases, histological examinations showed that this microenvironmental influence increased axonal diameter as well as myelination thickness. Such an analysis of available research on facial nerve injury and regeneration represents the first step toward future therapeutic strategies.
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Affiliation(s)
- Myung Chul Yoo
- Department of Physical Medicine & Rehabilitation, College of Medicine, Kyung Hee University, Seoul 02447, Korea; (M.C.Y.); (J.C.)
| | - Jinmann Chon
- Department of Physical Medicine & Rehabilitation, College of Medicine, Kyung Hee University, Seoul 02447, Korea; (M.C.Y.); (J.C.)
| | - Junyang Jung
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, Seoul 02447, Korea;
| | - Sung Su Kim
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul 02447, Korea;
| | - Seonhwan Bae
- Department of Otorhinolaryngology, Head & Neck Surgery, College of Medicine, Kyung Hee University, Seoul 02447, Korea; (S.B.); (S.H.K.)
| | - Sang Hoon Kim
- Department of Otorhinolaryngology, Head & Neck Surgery, College of Medicine, Kyung Hee University, Seoul 02447, Korea; (S.B.); (S.H.K.)
| | - Seung Geun Yeo
- Department of Otorhinolaryngology, Head & Neck Surgery, College of Medicine, Kyung Hee University, Seoul 02447, Korea; (S.B.); (S.H.K.)
- Correspondence: ; Tel.: +82-2-958-8980; Fax: +82-2-958-8470
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Gradwohl M, Chai F, Payen J, Guerreschi P, Marchetti P, Blanchemain N. Effects of Two Melt Extrusion Based Additive Manufacturing Technologies and Common Sterilization Methods on the Properties of a Medical Grade PLGA Copolymer. Polymers (Basel) 2021; 13:572. [PMID: 33672918 PMCID: PMC7917935 DOI: 10.3390/polym13040572] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/11/2021] [Accepted: 02/12/2021] [Indexed: 11/16/2022] Open
Abstract
Although bioabsorbable polymers have garnered increasing attention because of their potential in tissue engineering applications, to our knowledge there are only a few bioabsorbable 3D printed medical devices on the market thus far. In this study, we assessed the processability of medical grade Poly(lactic-co-glycolic) Acid (PLGA)85:15 via two additive manufacturing technologies: Fused Filament Fabrication (FFF) and Direct Pellet Printing (DPP) to highlight the least destructive technology towards PLGA. To quantify PLGA degradation, its molecular weight (gel permeation chromatography (GPC)) as well as its thermal properties (differential scanning calorimetry (DSC)) were evaluated at each processing step, including sterilization with conventional methods (ethylene oxide, gamma, and beta irradiation). Results show that 3D printing of PLGA on a DPP printer significantly decreased the number-average molecular weight (Mn) to the greatest extent (26% Mn loss, p < 0.0001) as it applies a longer residence time and higher shear stress compared to classic FFF (19% Mn loss, p < 0.0001). Among all sterilization methods tested, ethylene oxide seems to be the most appropriate, as it leads to no significant changes in PLGA properties. After sterilization, all samples were considered to be non-toxic, as cell viability was above 70% compared to the control, indicating that this manufacturing route could be used for the development of bioabsorbable medical devices. Based on our observations, we recommend using FFF printing and ethylene oxide sterilization to produce PLGA medical devices.
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Affiliation(s)
- Marion Gradwohl
- U1008 Controlled Drug Delivery Systems and Biomaterials, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire de Lille (CHU Lille), University of Lille, F-59000 Lille, France; (M.G.); (F.C.); (P.G.)
- UMR 9020–UMR-S 1277–Canther–Cancer Heterogeneity, Plasticity and Resistance to Therapies, Institut de Recherche contre le Cancer de Lille, University Lille, CNRS, Inserm, CHU Lille, F-59000 Lille, France;
- LATTICE MEDICAL, F-59120 Loos, France;
| | - Feng Chai
- U1008 Controlled Drug Delivery Systems and Biomaterials, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire de Lille (CHU Lille), University of Lille, F-59000 Lille, France; (M.G.); (F.C.); (P.G.)
| | | | - Pierre Guerreschi
- U1008 Controlled Drug Delivery Systems and Biomaterials, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire de Lille (CHU Lille), University of Lille, F-59000 Lille, France; (M.G.); (F.C.); (P.G.)
- Service de Chirurgie Plastique Reconstructrice et Esthétique, CHU de Lille, F-59037 Lille, France
| | - Philippe Marchetti
- UMR 9020–UMR-S 1277–Canther–Cancer Heterogeneity, Plasticity and Resistance to Therapies, Institut de Recherche contre le Cancer de Lille, University Lille, CNRS, Inserm, CHU Lille, F-59000 Lille, France;
- Banque de Tissus, Centre de Biologie-Pathologie, CHU Lille, F-59000 Lille, France
| | - Nicolas Blanchemain
- U1008 Controlled Drug Delivery Systems and Biomaterials, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Régional Universitaire de Lille (CHU Lille), University of Lille, F-59000 Lille, France; (M.G.); (F.C.); (P.G.)
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Shah SS, Lee S, Mithoefer K. Next-Generation Marrow Stimulation Technology for Cartilage Repair: Basic Science to Clinical Application. JBJS Rev 2021; 9:e20.00090. [PMID: 33512974 DOI: 10.2106/jbjs.rvw.20.00090] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
» Given the relatively high prevalence of full-thickness articular cartilage lesions, including in patients who are <40 years of age, and an inability to detect some of these lesions until the time of arthroscopy, there is value in performing a single-stage cartilage procedure such as marrow stimulation (MS). » While the positive outcomes of first-generation MS (namely microfracture) have been observed to drop off after 24 months in several studies, improvements have been seen when compared with preoperative conditions for lesions that are 2 to 3 cm2 in size, and MS is considered to be a procedure with technical simplicity, fairly short surgical times, and relatively low morbidity. A recent study showed that autologous chondrocyte implantation (ACI) and osteochondral allograft (OCA) transplantation remain viable treatment options for chondral defects of the knee in the setting of failed MS. » Basic science principles that have been elucidated in recent years include (1) the creation of vertical walls during defect preparation, (2) an increased depth of subchondral penetration, (3) a smaller awl diameter, and (4) an increased number of subchondral perforations, which are all thought to help resolve issues of access to the mesenchymal stromal cells (MSCs) and the subchondral bone structure/overgrowth issues. » Pioneering and evolving basic science and clinical studies have led to next-generation clinical applications, such as a hyaluronic acid-based scaffold (ongoing randomized controlled trial [RCT]), an atelocollagen-based gel (as described in a recently published RCT), a micronized allogeneic cartilage scaffold (as described in a recently completed prospective cohort study), and a biosynthetic hydrogel that is composed of polyethylene glycol (PEG) diacrylate and denatured fibrinogen (as described in an ongoing prospective study). » This review summarizes important points for defect preparation and the recent advances in MS techniques and identifies specific scaffolding augmentation strategies (e.g., mesenchymal augmentation and scaffold stimulation [MASS]) that have the capacity to advance cartilage regeneration in light of recent laboratory and clinical studies.
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Affiliation(s)
- Sarav S Shah
- Division of Sports Medicine, Department of Orthopaedic Surgery, New England Baptist Hospital, Boston, Massachusetts
| | - Sonia Lee
- Department of Orthopaedic Surgery, Tufts University School of Medicine, Boston, Massachusetts
| | - Kai Mithoefer
- Department of Orthopedics and Sports Medicine, Harvard Vanguard Medical Associates, Boston, Massachusetts
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13
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Biodegradable Polylactide Scaffolds with Pharmacological Activity by Means of Ultrasound Micromolding Technology. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10093106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ultrasound micromolding technology has been applied to get microporous polylactide scaffolds from the subsequent leaching of incorporated NaCl salts. A small amount of water-soluble polyethylene glycol (PEG) was required in order to improve the leaching process and get compact pieces with interconnected pores. Distribution of polymers in the processed specimens was quite homogeneous due to the small PEG content, although it was more concentrated in the regions close to the feeding channels due to its higher viscosity. Hydrophobic drugs like triclosan could be incorporated causing a minimum degradation during ultrasound processing and suffering an insignificant solubilization during the leaching step. Final scaffolds showed clear bactericide or bacteriostatic effects before and after 10 h of exposure. Cell proliferation of MDCK epithelial cells was higher for TCS loaded porous scaffolds (200%) than for unloaded samples (170%) and non-porous polylactide (PLA) specimens (100%, control). Micrographs showed the absence of non-inhibition areas in both the specimens and the container, confirming the biocompatibility of PLA specimens.
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14
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Weems AC, Pérez-Madrigal MM, Arno MC, Dove AP. 3D Printing for the Clinic: Examining Contemporary Polymeric Biomaterials and Their Clinical Utility. Biomacromolecules 2020; 21:1037-1059. [PMID: 32058702 DOI: 10.1021/acs.biomac.9b01539] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The advent of additive manufacturing offered the potential to revolutionize clinical medicine, particularly with patient-specific implants across a range of tissue types. However, to date, there are very few examples of polymers being used for additive processes in clinical settings. The state of the art with regards to 3D printable polymeric materials being exploited to produce novel clinically relevant implants is discussed here. We focus on the recent advances in the development of implantable, polymeric medical devices and tissue scaffolds without diverging extensively into bioprinting. By introducing the major 3D printing techniques along with current advancements in biomaterials, we hope to provide insight into how these fields may continue to advance while simultaneously reviewing the ongoing work in the field.
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Affiliation(s)
- Andrew C Weems
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K
| | | | - Maria C Arno
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K
| | - Andrew P Dove
- School of Chemistry, University of Birmingham, Birmingham B15 2TT, U.K
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15
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16
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Mendibil X, Ortiz R, Sáenz de Viteri V, Ugartemendia JM, Sarasua JR, Quintana I. High Throughput Manufacturing of Bio-Resorbable Micro-Porous Scaffolds Made of Poly(L-lactide-co-ε-caprolactone) by Micro-Extrusion for Soft Tissue Engineering Applications. Polymers (Basel) 2019; 12:E34. [PMID: 31878300 PMCID: PMC7023538 DOI: 10.3390/polym12010034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/18/2019] [Accepted: 12/22/2019] [Indexed: 11/17/2022] Open
Abstract
Porous scaffolds made of elastomeric materials are of great interest for soft tissue engineering. Poly(L-lactide-co-ε-caprolactone) (PLCL) is a bio-resorbable elastomeric copolymer with tailorable properties, which make this material an appropriate candidate to be used as scaffold for vascular, tendon, and nerve healing applications. Here, extrusion was applied to produce porous scaffolds of PLCL, using NaCl particles as a leachable agent. The effects of the particle proportion and size on leaching performance, dimensional stability, mechanical properties, and ageing of the scaffolds were analyzed. The efficiency of the particle leaching and scaffold swelling when wet were observed to be dependent on the porogenerator proportion, while the secant moduli and ultimate tensile strengths were dependent on the pore size. Porosity, swelling, and mechanical properties of the extruded scaffolds were tailorable, varying with the proportion and size of porogenerator particles and showed similar values to human soft tissues like nerves and veins (E = 7-15 MPa, σu = 7 MPa). Up to 300-mm length micro-porous PLCL tube with 400-µm thickness wall was extruded, proving extrusion as a high-throughput manufacturing process to produce tubular elastomeric bio-resorbable porous scaffolds of unrestricted length with tunable mechanical properties.
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Affiliation(s)
| | - Rocío Ortiz
- IK4-TEKNIKER, C/IñakiGoenaga 5, 20600 Eibar, Spain; (X.M.)
| | | | - Jone M. Ugartemendia
- Department of Mining-Metallurgy Engineering and Materials Science, School of Engineering, University of the Basque Country (EHU-UPV), 48013 Bilbao, Spain (J.-R.S.)
| | - Jose-Ramon Sarasua
- Department of Mining-Metallurgy Engineering and Materials Science, School of Engineering, University of the Basque Country (EHU-UPV), 48013 Bilbao, Spain (J.-R.S.)
| | - Iban Quintana
- IK4-TEKNIKER, C/IñakiGoenaga 5, 20600 Eibar, Spain; (X.M.)
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17
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Gostev AA, Chernonosova VS, Murashov IS, Sergeevichev DS, Korobeinikov AA, Karaskov AM, Karpenko AA, Laktionov PP. Electrospun polyurethane-based vascular grafts: physicochemical properties and functioning in vivo. ACTA ACUST UNITED AC 2019; 15:015010. [PMID: 31694007 DOI: 10.1088/1748-605x/ab550c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
General physicochemical properties of the vascular grafts (VGs) produced from the solutions of Tecoflex (Tec) with gelatin (GL) and bivalirudin (BV) by electrospinning are studied. The electrospun VGs of Tec-GL-BV and expanded polytetrafluoroethylene (e-PTFE) implanted in the abdominal aorta of 36 Wistar rats have been observed over different time intervals up to 24 weeks. A comparison shows that 94.5% of the Tec-GL-BV VGs and only 66.6% of e-PTFE VGs (р = 0.0438) are free of occlusions after a 6 month implantation. At the intermediate observation points, Tec-GL-BV VGs demonstrate severe neovascularization of the VG neoadventitial layer as compared with e-PTFE grafts. A histological examination demonstrates a small thickness of the neointima layer and a low level of calcification in Tec-GL-BV VGs as compared with the control grafts. Thus, polyurethane-based protein-enriched VGs have certain advantages over e-PTFE VGs, suggesting their utility in clinical studies.
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Affiliation(s)
- Alexandr A Gostev
- Meshalkin National Medical Research Center, Ministry of Health of the Russian Federation, Novosibirsk, 630055 Russia
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18
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Jahromi M, Razavi S, Bakhtiari A. The advances in nerve tissue engineering: From fabrication of nerve conduit to in vivo nerve regeneration assays. J Tissue Eng Regen Med 2019; 13:2077-2100. [PMID: 31350868 DOI: 10.1002/term.2945] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 07/09/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022]
Abstract
Peripheral nerve damage is a common clinical complication of traumatic injury occurring after accident, tumorous outgrowth, or surgical side effects. Although the new methods and biomaterials have been improved recently, regeneration of peripheral nerve gaps is still a challenge. These injuries affect the quality of life of the patients negatively. In the recent years, many efforts have been made to develop innovative nerve tissue engineering approaches aiming to improve peripheral nerve treatment following nerve injuries. Herein, we will not only outline what we know about the peripheral nerve regeneration but also offer our insight regarding the types of nerve conduits, their fabrication process, and factors associated with conduits as well as types of animal and nerve models for evaluating conduit function. Finally, nerve regeneration in a rat sciatic nerve injury model by nerve conduits has been considered, and the main aspects that may affect the preclinical outcome have been discussed.
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Affiliation(s)
- Maliheh Jahromi
- Department of Anatomical Science, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Shahnaz Razavi
- Department of Anatomical Science, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Abbas Bakhtiari
- Department of Anatomical Science, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Eswaramoorthy SD, Ramakrishna S, Rath SN. Recent advances in three-dimensional bioprinting of stem cells. J Tissue Eng Regen Med 2019; 13:908-924. [PMID: 30866145 DOI: 10.1002/term.2839] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 02/01/2019] [Accepted: 02/21/2019] [Indexed: 12/29/2022]
Abstract
In spite of being a new field, three-dimensional (3D) bioprinting has undergone rapid growth in the recent years. Bioprinting methods offer a unique opportunity for stem cell distribution, positioning, and differentiation at the microscale to make the differentiated architecture of any tissue while maintaining precision and control over the cellular microenvironment. Bioprinting introduces a wide array of approaches to modify stem cell fate. This review discusses these methodologies of 3D bioprinting stem cells. Fabricating a fully operational tissue or organ construct with a long life will be the most significant challenge of 3D bioprinting. Once this is achieved, a whole human organ can be fabricated for the defect place at the site of surgery.
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Affiliation(s)
- Sindhuja D Eswaramoorthy
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad (IITH), Sangareddy, Telangana, India
| | - Seeram Ramakrishna
- Centre for Nanofibers & Nanotechnology, NUS Nanoscience & Nanotechnology Initiative, Singapore
| | - Subha N Rath
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad (IITH), Sangareddy, Telangana, India
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20
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Zhang Y, Zhao J, Yang G, Zhou Y, Gao W, Wu G, Li X, Mao C, Sheng T, Zhou M. Mechanical properties and degradation of drug eluted bioresorbable vascular scaffolds prepared by three-dimensional printing technology. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:547-560. [PMID: 30897033 DOI: 10.1080/09205063.2019.1586303] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Bioresorbable vascular scaffolds are expected to replace the traditional metal stent, avoiding the long-term complications of metal stents. However, it is hard for the traditional scaffold manufacturing process to meet the requirements of individualized treatment for vascular lesions, which requires different morphologies. Here, we used a new method of scaffold manufacturing, three-dimensional printing technology, to prepare bioresorbable vascular scaffolds. The fabricated scaffold was loaded with sirolimus mixed with scaffold preparation material for slow drug release. The engineered, drug- loaded, bioresorbable vascular scaffold (BVS) was analyzed and tested in vivo. The scaffolds produced by three-dimensional printing technology exhibited good mechanical properties and in vitro degradation performance. The results also suggested that these scaffolds could maintain effective radial strength after long-term degradation and sustained release of the drug. As a new scaffold preparation method, it may provide a promising idea for developing bioresorbable vascular scaffold technology.
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Affiliation(s)
- Yepeng Zhang
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Jie Zhao
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Guangmin Yang
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Yu Zhou
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Wentao Gao
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Guangyan Wu
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Xiaoqiang Li
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
| | - Chun Mao
- b School of Chemistry and National and Local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biofunctional Materials Materials Science , Nanjing Normal University , Nanjing , People's Republic of China
| | - Tao Sheng
- c Department of Vascular and Interventional Radiology , Wujin People's Hospital Affilicated to Jiangsu University , Changzhou , People's Republic of China
| | - Min Zhou
- a Department of Vascular Surgery , Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School , Nanjing , People's Republic of China
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21
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Im SH, Park SJ, Chung JJ, Jung Y, Kim SH. Creation of polylactide vascular scaffolds with high compressive strength using a novel melt-tube drawing method. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Duffy P, McMahon S, Wang X, Keaveney S, O'Cearbhaill ED, Quintana I, Rodríguez FJ, Wang W. Synthetic bioresorbable poly-α-hydroxyesters as peripheral nerve guidance conduits; a review of material properties, design strategies and their efficacy to date. Biomater Sci 2019; 7:4912-4943. [DOI: 10.1039/c9bm00246d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Implantable tubular devices known as nerve guidance conduits (NGCs) have drawn considerable interest as an alternative to autografting in the repair of peripheral nerve injuries.
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Affiliation(s)
- Patrick Duffy
- The Charles Institute of Dermatology
- School of Medicine
- University College Dublin
- Dublin
- Ireland
| | - Seán McMahon
- Ashland Specialties Ireland Ltd
- Synergy Centre
- Dublin
- Ireland
| | - Xi Wang
- The Charles Institute of Dermatology
- School of Medicine
- University College Dublin
- Dublin
- Ireland
| | - Shane Keaveney
- School of Mechanical & Materials Engineering
- UCD Centre for Biomedical Engineering
- UCD Conway Institute of Biomolecular and Biomedical Research
- University College Dublin
- Dublin
| | - Eoin D. O'Cearbhaill
- School of Mechanical & Materials Engineering
- UCD Centre for Biomedical Engineering
- UCD Conway Institute of Biomolecular and Biomedical Research
- University College Dublin
- Dublin
| | - Iban Quintana
- IK4-Tekniker
- Surface Engineering and Materials Science Unit
- Eibar
- Spain
| | | | - Wenxin Wang
- The Charles Institute of Dermatology
- School of Medicine
- University College Dublin
- Dublin
- Ireland
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Cheng X, Shi H, Wang Z, Zheng G, Liu P, Dai K, Liu C, Shen C. Bioinspired Concentric-Cylindrical Multilayered Scaffolds with Controllable Architectures: Facile Preparation and Biological Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43512-43522. [PMID: 30474950 DOI: 10.1021/acsami.8b18095] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Multilayered objects are the most important and interesting structures in nature, exhibiting multiple functionalities. Inspired by the excellent structural-functional characteristics of nature creatures, concentric-cylindrical multilayered scaffolds were prepared by a combination of melt extrusion and leaching, in which well-defined alternating microlayer/gap is assembled. Furthermore, the macroscopic shape, internal structure, and surface topography of such a multilayered scaffold can be elaborately prepared by a simple physical process. The whole process has low cost, is efficient, and is environmentally friendly. Furthermore, such multilayered scaffolds show some interesting applications, e.g., lipophilic/hydrophilic drugs delivery and cell self-seeding. Considering the facile preparation process and versatile applications, this study will open up a new pathway to fabricate scaffolds with controllable architectures and expand their biodegradable polymer applications.
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Affiliation(s)
- Xiaopeng Cheng
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Honghui Shi
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Zhaofei Wang
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Guoqiang Zheng
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Pingping Liu
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Kun Dai
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Chuntai Liu
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
| | - Changyu Shen
- College of Materials Science and Engineering, The First Affiliated Hospital of Zhengzhou University, Department of Immunology, National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University , Zhengzhou 450002 , P. R. China
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Bonartsev AP, Voinova VV, Bonartseva GA. Poly(3-hydroxybutyrate) and Human Microbiota (Review). APPL BIOCHEM MICRO+ 2018. [DOI: 10.1134/s0003683818060066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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25
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Dixon AR, Jariwala SH, Bilis Z, Loverde JR, Pasquina PF, Alvarez LM. Bridging the gap in peripheral nerve repair with 3D printed and bioprinted conduits. Biomaterials 2018; 186:44-63. [DOI: 10.1016/j.biomaterials.2018.09.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 01/14/2023]
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26
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Shah SS, Liang H, Pandit S, Parikh Z, Schwartz JA, Goldstein T, Lavelle LP, Datta A, Grande DA. Optimization of Degradation Profile for New Scaffold in Cartilage Repair. Cartilage 2018; 9:438-449. [PMID: 28399641 PMCID: PMC6139589 DOI: 10.1177/1947603517700954] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Objective To establish whether a novel biomaterial scaffold with tunable degradation profile will aid in cartilage repair of chondral defects versus microfracture alone in vitro and in a rat model in vivo. Design In vitro-Short- and long-term degradation scaffolds were seeded with culture expanded articular chondrocytes or bone marrow mesenchymal stem cells. Cell growth and differentiation were evaluated with cell morphological studies and gene expression studies. In vivo-A microfracture rat model was used in this study to evaluate the repair of cartilage and subchondral bone with the contralateral knee serving as the empty control. The treatment groups include (1) empty osteochondral defect, (2) polycaprolactone copolymer-based polyester polyurethane-urea (PSPU-U) caffold short-term degradative profile, and (3) PSPU-U scaffold long-term degradative profile. After placement of the scaffold, the rats were then allowed unrestricted activity as tolerated, and histological analyses were performed at 4, 8, and 16 weeks. The cartilage defect was measured and compared with the contralateral control side. Results In vitro-Long-term scaffolds showed statistically significant higher levels of aggrecan and type II collagen expression compared with short-term scaffolds. In vivo-Within 16 weeks postimplantation, there was new subchondral bone formation in both scaffolds. Short-term scaffolds had a statistically significant increase in defect filling and better qualitative histologic fill compared to control. Conclusions The PSPU short-term degradation scaffold may aid in cartilage repair by ultimately incorporating the scaffold into the microfracture procedure.
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Affiliation(s)
- Sarav S. Shah
- Department of Orthopaedic Surgery, Hofstra-Northwell School of Medicine, New Hyde Park, NY, USA
| | - Haixiang Liang
- Orthopaedic Research Laboratory, Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - Sandeep Pandit
- Department of Orthopaedic Surgery, Hofstra-Northwell School of Medicine, New Hyde Park, NY, USA
| | - Zalak Parikh
- Orthopaedic Research Laboratory, Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - John A. Schwartz
- Orthopaedic Research Laboratory, Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - Todd Goldstein
- Orthopaedic Research Laboratory, Feinstein Institute for Medical Research, Manhasset, NY, USA
| | | | | | - Daniel A. Grande
- Department of Orthopaedic Surgery, Hofstra-Northwell School of Medicine, New Hyde Park, NY, USA,Orthopaedic Research Laboratory, Feinstein Institute for Medical Research, Manhasset, NY, USA,Daniel A. Grande, The Feinstein Institute for Medical Research, Northwell Health System, 350 Community Drive, Manhasset, NY 11030, USA.
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Carvalho CR, Costa JB, da Silva Morais A, López-Cebral R, Silva-Correia J, Reis RL, Oliveira JM. Tunable Enzymatically Cross-Linked Silk Fibroin Tubular Conduits for Guided Tissue Regeneration. Adv Healthc Mater 2018; 7:e1800186. [PMID: 29999601 DOI: 10.1002/adhm.201800186] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/03/2018] [Indexed: 01/11/2023]
Abstract
Hollow tubular conduits (TCs) with tunable architecture and biological properties are in great need for modulating cell functions and drug delivery in guided tissue regeneration. Here, a new methodology to produce enzymatically cross-linked silk fibroin TCs is described, which takes advantage of the tyrosine groups present in silk structure that are known to allow the formation of a covalently cross-linked hydrogel. Three different processing methods are used as a final step to modulate the properties of the silk-based TCs. This approach allows to virtually adjust any characteristic of the final TCs. The final microstructure ranges from a nonporous to a highly porous network, allowing the TCs to be selectively porous to 4 kDa molecules, but not to human skin fibroblasts. Mechanical properties are dependent both on the processing method and thickness of the TCs. Bioactivity is observed after 30 days of immersion in simulated body fluid only for the TCs submitted to a drying processing method (50 °C). The in vivo study performed in mice demonstrates the good biocompatibility of the TCs. The enzymatically cross-linked silk fibroin TCs are versatile and have adjustable characteristics that can be exploited in a variety of biomedical applications, particularly in guidance of peripheral nerve regeneration.
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Affiliation(s)
- Cristiana R. Carvalho
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision Medicine; Headquarters at University of Minho, Avepark; 4805-017 Barco Guimarães Portugal
| | - João B. Costa
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision Medicine; Headquarters at University of Minho, Avepark; 4805-017 Barco Guimarães Portugal
| | - Alain da Silva Morais
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
| | - Rita López-Cebral
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision Medicine; Headquarters at University of Minho, Avepark; 4805-017 Barco Guimarães Portugal
| | - Joana Silva-Correia
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
| | - Rui L. Reis
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision Medicine; Headquarters at University of Minho, Avepark; 4805-017 Barco Guimarães Portugal
| | - J. Miguel Oliveira
- 3B's Research Group; I3Bs-Research Institute on Biomaterials; Biodegradables and Biomimetics; University of Minho; Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, Parque de Ciência e Tecnologia; Zona Industrial da Gandra; 4805-017 Barco Guimarães Portugal
- ICVS/3B's-PT Government Associate Laboratory; Braga Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision Medicine; Headquarters at University of Minho, Avepark; 4805-017 Barco Guimarães Portugal
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28
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The influence of cross-sectional morphology on the compressive resistance of polymeric nerve conduits. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Uz M, Das SR, Ding S, Sakaguchi DS, Claussen JC, Mallapragada SK. Advances in Controlling Differentiation of Adult Stem Cells for Peripheral Nerve Regeneration. Adv Healthc Mater 2018; 7:e1701046. [PMID: 29656561 DOI: 10.1002/adhm.201701046] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 01/08/2018] [Indexed: 01/01/2023]
Abstract
Adult stems cells, possessing the ability to grow, migrate, proliferate, and transdifferentiate into various specific phenotypes, constitute a great asset for peripheral nerve regeneration. Adult stem cells' ability to undergo transdifferentiation is sensitive to various cell-to-cell interactions and external stimuli involving interactions with physical, mechanical, and chemical cues within their microenvironment. Various studies have employed different techniques for transdifferentiating adult stem cells from distinct sources into specific lineages (e.g., glial cells and neurons). These techniques include chemical and/or electrical induction as well as cell-to-cell interactions via co-culture along with the use of various 3D conduit/scaffold designs. Such scaffolds consist of unique materials that possess controllable physical/mechanical properties mimicking cells' natural extracellular matrix. However, current limitations regarding non-scalable transdifferentiation protocols, fate commitment of transdifferentiated stem cells, and conduit/scaffold design have required new strategies for effective stem cells transdifferentiation and implantation. In this progress report, a comprehensive review of recent advances in the transdifferentiation of adult stem cells via different approaches along with multifunctional conduit/scaffolds designs is presented for peripheral nerve regeneration. Potential cellular mechanisms and signaling pathways associated with differentiation are also included. The discussion with current challenges in the field and an outlook toward future research directions is concluded.
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Affiliation(s)
- Metin Uz
- Department of Chemical and Biological Engineering Iowa State University Ames IA 50011 USA
| | - Suprem R. Das
- Department of Mechanical Engineering Iowa State University Ames IA 50011 USA
- Division of Materials Science and Engineering Ames Laboratory Ames IA 50011 USA
| | - Shaowei Ding
- Department of Mechanical Engineering Iowa State University Ames IA 50011 USA
| | - Donald S. Sakaguchi
- Neuroscience Program Iowa State University Ames IA 50011 USA
- Department of Genetics Development and Cell Biology Iowa State University Ames IA 50011 USA
| | - Jonathan C. Claussen
- Department of Mechanical Engineering Iowa State University Ames IA 50011 USA
- Division of Materials Science and Engineering Ames Laboratory Ames IA 50011 USA
| | - Surya K. Mallapragada
- Department of Chemical and Biological Engineering Iowa State University Ames IA 50011 USA
- Department of Genetics Development and Cell Biology Iowa State University Ames IA 50011 USA
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30
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Bucan V, Vaslaitis D, Peck CT, Strauß S, Vogt PM, Radtke C. Effect of Exosomes from Rat Adipose-Derived Mesenchymal Stem Cells on Neurite Outgrowth and Sciatic Nerve Regeneration After Crush Injury. Mol Neurobiol 2018; 56:1812-1824. [PMID: 29931510 PMCID: PMC6394792 DOI: 10.1007/s12035-018-1172-z] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 06/01/2018] [Indexed: 12/29/2022]
Abstract
Peripheral nerve injury requires optimal conditions in both macro-environment and microenvironment for promotion of axonal regeneration. However, most repair strategies of traumatic peripheral nerve injury often lead to dissatisfying results in clinical outcome. Though various strategies have been carried out to improve the macro-environment, the underlying molecular mechanism of axon regeneration in the microenvironment provided by nerve conduit remains unclear. In this study, we evaluate the effects of from adipose-derived mesenchymal stem cells (adMSCs) originating exosomes with respect to sciatic nerve regeneration and neurite growth. Molecular and immunohistochemical techniques were used to investigate the presence of characteristic exosome markers. A co-culture system was established to determine the effect of exosomes on neurite elongation in vitro. The in vivo walking behaviour of rats was evaluated by footprint analysis, and the nerve regeneration was assessed by immunocytochemistry. adMSCs secrete nano-vesicles known as exosomes, which increase neurite outgrowth in vitro and enhance regeneration after sciatic nerve injury in vivo. Furthermore, we showed the presence of neural growth factors transcripts in adMSC exosomes for the first time. Our results demonstrate that exosomes, constitutively produced by adMSCs, are involved in peripheral nerve regeneration and have the potential to be utilised as a therapeutic tool for effective tissue-engineered nerves.
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Affiliation(s)
- Vesna Bucan
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany. .,Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Feodor-Lynen Str. 21, Hannover, Germany.
| | - Desiree Vaslaitis
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.,Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Feodor-Lynen Str. 21, Hannover, Germany
| | - Claas-Tido Peck
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.,Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Feodor-Lynen Str. 21, Hannover, Germany
| | - Sarah Strauß
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.,Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Feodor-Lynen Str. 21, Hannover, Germany
| | - Peter M Vogt
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.,Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Feodor-Lynen Str. 21, Hannover, Germany
| | - Christine Radtke
- Department of Plastic, Hand and Reconstructive Surgery, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625, Hannover, Germany.,Department of Plastic and Reconstructive Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
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31
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Wu H, Fang Q, Liu J, Yu X, Xu Y, Wan Y, Xiao B. Multi-tubule conduit-filler constructs loaded with gradient-distributed growth factors for neural tissue engineering applications. J Mech Behav Biomed Mater 2018; 77:671-682. [DOI: 10.1016/j.jmbbm.2017.10.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 10/01/2017] [Accepted: 10/23/2017] [Indexed: 01/12/2023]
Affiliation(s)
- Hua Wu
- Department of Nuclear Medicine and Minnan PET Center, the First Affiliated Hospital of Xiamen University, Xiamen 316003, PR China
| | - Qing Fang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Jiaoyan Liu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Xiaofeng Yu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Yigui Xu
- Department of Research and Development, ZCPPE Ltd., 5160 Skyline Way NE, Calgary, Alberta, Canada T2E 6V1
| | - Ying Wan
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - Bo Xiao
- Institute for Clean Energy and Advanced Materials, Faculty for Materials and Energy, Southwest University, Chongqing 400715, PR China.
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32
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Turunen S, Joki T, Hiltunen ML, Ihalainen TO, Narkilahti S, Kellomäki M. Direct Laser Writing of Tubular Microtowers for 3D Culture of Human Pluripotent Stem Cell-Derived Neuronal Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:25717-25730. [PMID: 28697300 DOI: 10.1021/acsami.7b05536] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As the complex structure of nervous tissue cannot be mimicked in two-dimensional (2D) cultures, the development of three-dimensional (3D) neuronal cell culture platforms is a topical issue in the field of neuroscience and neural tissue engineering. Computer-assisted laser-based fabrication techniques such as direct laser writing by two-photon polymerization (2PP-DLW) offer a versatile tool to fabricate 3D cell culture platforms with highly ordered geometries in the size scale of natural 3D cell environments. In this study, we present the design and 2PP-DLW fabrication process of a novel 3D neuronal cell culture platform based on tubular microtowers. The platform facilitates efficient long-term 3D culturing of human neuronal cells and supports neurite orientation and 3D network formation. Microtower designs both with or without intraluminal guidance cues and/or openings in the tower wall are designed and successfully fabricated from Ormocomp. Three of the microtower designs are chosen for the final culture platform: a design with openings in the wall and intralumial guidance cues (webs and pillars), a design with openings but without intraluminal structures, and a plain cylinder design. The proposed culture platform offers a promising concept for future 3D cultures in the field of neuroscience.
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Affiliation(s)
- Sanna Turunen
- Biomaterials and Tissue Engineering Group, BioMediTech and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology , Korkeakoulunkatu 3, 33720 Tampere, Finland
| | - Tiina Joki
- NeuroGroup, BioMediTech and Faculty of Medicine and Life Sciences, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
| | - Maiju L Hiltunen
- Biomaterials and Tissue Engineering Group, BioMediTech and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology , Korkeakoulunkatu 3, 33720 Tampere, Finland
| | - Teemu O Ihalainen
- NeuroGroup, BioMediTech and Faculty of Medicine and Life Sciences, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
| | - Susanna Narkilahti
- NeuroGroup, BioMediTech and Faculty of Medicine and Life Sciences, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
| | - Minna Kellomäki
- Biomaterials and Tissue Engineering Group, BioMediTech and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology , Korkeakoulunkatu 3, 33720 Tampere, Finland
- BioMediTech and Faculty of Medicine and Life Sciences, University of Tampere , Lääkärinkatu 1, 33520 Tampere, Finland
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33
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Tsujimoto G, Sunada K, Nakamura T. Effect of cervical sympathetic ganglionectomy on facial nerve reconstruction using polyglycolic acid-collagen tubes. Brain Res 2017; 1669:79-88. [DOI: 10.1016/j.brainres.2017.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 05/24/2017] [Accepted: 05/26/2017] [Indexed: 01/21/2023]
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34
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Kuhbier JW, Coger V, Mueller J, Liebsch C, Schlottmann F, Bucan V, Vogt PM, Strauss S. Influence of direct or indirect contact for the cytotoxicity and blood compatibility of spider silk. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:127. [PMID: 28721663 DOI: 10.1007/s10856-017-5936-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 06/21/2017] [Indexed: 05/26/2023]
Abstract
Spider silk became one of the most-researched biomaterials in the last years due to its unique mechanical strength and most favourable chemical composition for tissue engineering purposes. However, standardized analysis of cytocompatibility is missing. Therefore, the aim of this study was to investigate hemolysis, cytotoxicity of native spider silk as well as influences on the cell culture medium. Changes of cell culture medium composition, osmolarity as well as glucose and lactate content were determined via ELISA measurement. Possible hemolysis and cytotoxicity in vitro of spider silk were performed via measurement of hemoglobin release of human red blood cells or relative metabolic activity of L929 fibroblasts, respectively, according to international standard procedures. In ELISA measurement, no significant changes in medium composition could be found in this study. Spider silk was not hemolytic in direct and indirect testing. However, a borderline cytotoxicity according to definitions was found in indirect cytotoxicity testing. Nevertheless, in direct cytotoxicity testing, relative metabolic activity measurement revealed that spider silk is not cytotoxic under these conditions. This is the first study to conduct standardized tests regarding cytotoxicity and hemolysis of native spider silk, which might be considered inert in cell culture. As neither hemolysis nor cytotoxicity was found in direct contact in standardized procedures, safety in biomedical applications may be assumed. The indirect cytotoxicity seems to play a minor role in vivo. However, a borderline toxicity was revealed, suggesting potential leachables not yet identified. Displays one of the weaving frames used in this study after seeding with the single drop technique described herein.
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Affiliation(s)
- J W Kuhbier
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany.
| | - V Coger
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
| | - J Mueller
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
| | - C Liebsch
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
| | - F Schlottmann
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
| | - V Bucan
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
| | - P M Vogt
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
| | - S Strauss
- Department of Plastic, Aesthetic, Hand and Reconstructive Surgery, Medical School Hannover, Carl-Neuberg-Strasse 1, Hannover, 30625, Germany
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35
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Gámez E, Goto Y, Nagata K, Iwaki T, Sasaki T, Matsuda T. Photofabricated Gelatin-Based Nerve Conduits: Nerve Tissue Regeneration Potentials. Cell Transplant 2017; 13:549-64. [PMID: 15565867 DOI: 10.3727/000000004783983639] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
There is a strong demand for development of nerve guide conduit with prompt nerve regeneration potential for injury-induced nerve defect. Prior to study on nerve tissue engineering using Schwann cells or nerve stem cells, the effectiveness of photofabricated scaffolds based on photocurable gelatin was examined. This study describes the evaluation of in vivo nerve tissue regeneration potentials of three custom-designed and -fabricated prostheses (inner diameter, 1.2 mm; outer diameter, 2.4 mm; wall thickness, 0.60 mm; and length, 15 mm) made of photocured gelatin: a plain photocured gelatin tube (model I), a photocured gelatin tube packed with bioactive substances (laminin, fibronectin, and nerve growth factor) coimmobilized in a photocured gelatin rod (model II), and a photocured gelatin tube packed with bioactive substances coimmobilized in multifilament fibers (model III). These prostheses were implanted between the proximal and distal stumps 10 mm of the dissected right sciatic nerve of 70 adult male Lewis rats for up to 1 year. The highest regenerative potentials were found using the model III prosthesis, followed by the model II prosthesis. Markedly retarded neural regeneration was observed using the model I prosthesis. These were evaluated from the viewpoints of functional recovery, electrophysiological responses, and tissue morphological regeneration. The significance of the synergistic cooperative functions of multifilaments, which serve as a platform that provides contact guidance to direct longitudinal cell movement and tissue ingrowth and as a cell adhesive matrix with high surface area, and immobilized bioactive substances, which enhance nerve regeneration via biological stimulation, is discussed.
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Affiliation(s)
- Eduardo Gámez
- Division of Biomedical Engineering, Graduate School of Dental Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-Ku, Fukuoka 812-8582, Japan
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36
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Jang CH, Lee H, Kim M, Kim G. Effect of polycaprolactone/collagen/hUCS microfiber nerve conduit on facial nerve regeneration. Int J Biol Macromol 2016; 93:1575-1582. [DOI: 10.1016/j.ijbiomac.2016.04.031] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 04/08/2016] [Accepted: 04/12/2016] [Indexed: 12/11/2022]
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37
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Yin HM, Qian J, Zhang J, Lin ZF, Li JS, Xu JZ, Li ZM. Engineering Porous Poly(lactic acid) Scaffolds with High Mechanical Performance via a Solid State Extrusion/Porogen Leaching Approach. Polymers (Basel) 2016; 8:E213. [PMID: 30979308 PMCID: PMC6432203 DOI: 10.3390/polym8060213] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/18/2016] [Accepted: 05/26/2016] [Indexed: 01/20/2023] Open
Abstract
A knotty issue concerning the poor mechanical properties exists in the porogen leaching approach to porous scaffolds, despite its advantage in tuning pore structure. To address this hurdle, solid state extrusion (SSE) combined with porogen leaching was utilized to engineer porous scaffolds of poly(lactic acid) (PLA). Advances introduced by poly(ethylene glycol) (PEG) caused the PLA ductile to be processed and, on the other hand, enabled the formation of interconnected pores. Thus, a well-interconnected porous architecture with high connectivity exceeding 97% and elevated porosity over 60% was obtained in the as-prepared PLA scaffolds with the composition of NaCl higher than 75.00 wt % and PEG beyond 1.25 wt %. More strikingly, the pore walls of macropores encompassed countless micropores and rough surface topography, in favor of transporting nutrients and metabolites as well as cell attachment. The prominent compressive modulus of the PLA scaffolds was in the range of 85.7⁻207.4 MPa, matching the normal modulus of human trabecular bone (50⁻250 MPa). By means of alkaline modification to improve hydrophilicity, biocompatible porous PLA scaffolds exhibited good cell attachment. These results suggest that the SSE/porogen leaching approach provides an eligible clue for fabricating porous scaffolds with high mechanical performance for use as artificial extracellular matrices.
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Affiliation(s)
- Hua-Mo Yin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jing Qian
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Zai-Fu Lin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jian-Shu Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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38
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Mohammadian F, Eatemadi A. Drug loading and delivery using nanofibers scaffolds. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:881-888. [PMID: 27188394 DOI: 10.1080/21691401.2016.1185726] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In recent times, notable advancement has been made in the field of electrospinning for the fabrication of numerous types of nanofiber scaffolds. Due to the ultrathin fiber diameter, electrospun nanofiber scaffolds are considered to be an operational delivery system for biomolecules, genes, as well as drugs due to the high specific surface area and stereological porous structure. Here, we introduce some of methods for the integration of drugs and biomolecules within electrospun nanofiber scaffolds, such as blending, surface modification, coaxial process, and emulsion methods. Then, we describe some important biomedical applications of nanofibers in drug delivery systems along with their suitable examples in transdermal systems and wound dressings, cancer therapy, growth factor delivery, nucleic acid delivery, and stem cell delivery.
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Affiliation(s)
- Farideh Mohammadian
- a Department of Medical Biotechnology, Faculty of Advance Medical Sciences , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Ali Eatemadi
- b Department of Medical Biotechnology, School of Advance Science in Medicine , Tehran University of Medical Sciences , Tehran , Iran
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39
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Noreen A, Zia KM, Zuber M, Ali M, Mujahid M. A critical review of algal biomass: A versatile platform of bio-based polyesters from renewable resources. Int J Biol Macromol 2016; 86:937-49. [DOI: 10.1016/j.ijbiomac.2016.01.067] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 01/09/2016] [Accepted: 01/19/2016] [Indexed: 10/22/2022]
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40
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Fabien V, Minh-Quan L, Michelle S, Guillaume B, Van-Thanh T, Marie-Claire VJ. Development of prilling process for biodegradable microspheres through experimental designs. Int J Pharm 2016; 498:96-109. [PMID: 26656302 DOI: 10.1016/j.ijpharm.2015.11.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/27/2015] [Accepted: 11/28/2015] [Indexed: 01/29/2023]
Abstract
The prilling process proposes a microparticle formulation easily transferable to the pharmaceutical production, leading to monodispersed and highly controllable microspheres. PLGA microspheres were used for carrying an encapsulated protein and adhered stem cells on its surface, proposing a tool for regeneration therapy against injured tissue. This work focused on the development of the production of PLGA microspheres by the prilling process without toxic solvent. The required production quality needed a complete optimization of the process. Seventeen parameters were studied through experimental designs and led to an acceptable production. The key parameters and mechanisms of formation were highlighted.
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Affiliation(s)
- Violet Fabien
- LUNAM Université, Micro et Nanomédecines Biomimétiques (MINT), F-49933 Angers, France; INSERM U1066, F-49933 Angers, France
| | - Le Minh-Quan
- LUNAM Université, Micro et Nanomédecines Biomimétiques (MINT), F-49933 Angers, France; INSERM U1066, F-49933 Angers, France
| | - Sergent Michelle
- Aix Marseille Université, LISA, EA 4672, 13013 Marseille, France
| | - Bastiat Guillaume
- LUNAM Université, Micro et Nanomédecines Biomimétiques (MINT), F-49933 Angers, France; INSERM U1066, F-49933 Angers, France
| | - Tran Van-Thanh
- LUNAM Université, Micro et Nanomédecines Biomimétiques (MINT), F-49933 Angers, France; INSERM U1066, F-49933 Angers, France
| | - Venier-Julienne Marie-Claire
- LUNAM Université, Micro et Nanomédecines Biomimétiques (MINT), F-49933 Angers, France; INSERM U1066, F-49933 Angers, France.
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41
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Peng XF, Li KC, Mi HY, Jing X, Chen BY. Excellent properties and extrusion foaming behavior of PPC/PS/PTFE composites with an in situ fibrillated PTFE nanofibrillar network. RSC Adv 2016. [DOI: 10.1039/c5ra19965d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, we compounded polystyrene (PS) and polytetrafluoroethylene (PTFE) with poly(propylene carbonate) (PPC) to prepare multiphase composites that possess special properties and to improve the extrusion foaming ability of PPC.
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Affiliation(s)
- Xiang-Fang Peng
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou 510640
- China
| | - Kai-Can Li
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou 510640
- China
| | - Hao-Yang Mi
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou 510640
- China
| | - Xin Jing
- The Key Laboratory of Polymer Processing Engineering of Ministry of Education
- National Engineering Research Center of Novel Equipment for Polymer Processing
- South China University of Technology
- Guangzhou 510640
- China
| | - Bin-Yi Chen
- Department of Industrial Equipment and Control Engineering
- South China University of Technology
- Guangzhou 510640
- China
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42
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Wan Y, Zhang J, Luo Y, Zhou T, Wu H. Preparation and degradation of chitosan-poly(p-dioxanone)/silk fibroin porous conduits. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.05.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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Trends in the design of nerve guidance channels in peripheral nerve tissue engineering. Prog Neurobiol 2015; 131:87-104. [DOI: 10.1016/j.pneurobio.2015.06.001] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 06/03/2015] [Accepted: 06/09/2015] [Indexed: 01/01/2023]
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Zhao F, Vaughan TJ, McNamara LM. Quantification of fluid shear stress in bone tissue engineering scaffolds with spherical and cubical pore architectures. Biomech Model Mechanobiol 2015. [DOI: 10.1007/s10237-015-0710-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Tubular Scaffold with Shape Recovery Effect for Cell Guide Applications. J Funct Biomater 2015; 6:564-84. [PMID: 26184328 PMCID: PMC4598671 DOI: 10.3390/jfb6030564] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 07/02/2015] [Indexed: 12/20/2022] Open
Abstract
Tubular scaffolds with aligned polylactic acid (PLA) fibres were fabricated for cell guide applications by immersing rolled PLA fibre mats into a polyvinyl acetate (PVAc) solution to bind the mats. The PVAc solution was also mixed with up to 30 wt % β-tricalcium phosphate (β-TCP) content. Cross-sectional images of the scaffold materials obtained via scanning electron microscopy (SEM) revealed the aligned fibre morphology along with a significant number of voids in between the bundles of fibres. The addition of β-TCP into the scaffolds played an important role in increasing the void content from 17.1% to 25.3% for the 30 wt % β-TCP loading, which was measured via micro-CT (µCT) analysis. Furthermore, µCT analyses revealed the distribution of aggregated β-TCP particles in between the various PLA fibre layers of the scaffold. The compressive modulus properties of the scaffolds increased from 66 MPa to 83 MPa and the compressive strength properties decreased from 67 MPa to 41 MPa for the 30 wt % β-TCP content scaffold. The scaffolds produced were observed to change into a soft and flexible form which demonstrated shape recovery properties after immersion in phosphate buffered saline (PBS) media at 37 °C for 24 h. The cytocompatibility studies (using MG-63 human osteosarcoma cell line) revealed preferential cell proliferation along the longitudinal direction of the fibres as compared to the control tissue culture plastic. The manufacturing process highlighted above reveals a simple process for inducing controlled cell alignment and varying porosity features within tubular scaffolds for potential tissue engineering applications.
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Effectively Axonal-supercharged Interpositional Jump-Graft with an Artificial Nerve Conduit for Rat Facial Nerve Paralysis. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2015; 3:e416. [PMID: 26180717 PMCID: PMC4494486 DOI: 10.1097/gox.0000000000000397] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/23/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Interpositional jump graft (IPJG) is a nerve graft axonally supercharged from the hypoglossal nerve. However, for using the technique, an autologous nerve, which should contain the great auricular and sural nerves, must be obtained. Depending on the donor site, unavoidable issues such as nerve disorders and postoperative scarring may appear. To reduce the issues, in this study, the authors developed an end-to-side neurorrhaphy technique with the recipient nerve and an artificial nerve conduit and investigated the efficacy of an IPJG with an artificial nerve conduit in a rat facial nerve paresis model. METHODS A ligature clip was used to crush the facial nerve trunk, thereby creating a partial facial nerve paresis model. An artificial nerve conduit was then prepared with a 10-mm-long silicone tube containing 10 μL type I collagen and used to create an IPJG between the facial nerve trunk and the hypoglossal nerve (the silicone tube group). Thirteen weeks after the surgery, the outcome was histologically and physiologically compared with conventional IPJG with autograft using the great auricular nerve. RESULTS Retrograde tracer test confirmed a double innervation by the facial and hypoglossal nerve nuclei. In the autograft and silicone tube groups, the regeneration of myelinated axons was observed. CONCLUSION In this study, the authors successfully developed an end-to-side neurorrhaphy technique with the recipient nerve and an artificial nerve conduit, and revealed that an IPJG in the conduit was effective in the rat facial nerve paresis model.
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Gholizadeh-Ghaleh aziz S, Gholizadeh-Ghaleh aziz S, Akbarzadeh A. The potential of nanofibers in tissue engineering and stem cell therapy. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:1195-200. [DOI: 10.3109/21691401.2015.1029627] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Shiva Gholizadeh-Ghaleh aziz
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
- Iran National Science Foundation: INSF, Iran
| | | | - Abolfazl Akbarzadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Iran National Science Foundation: INSF, Iran
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Abstract
Biodegradable polymers have played an important role in the delivery of drugs in a controlled and targeted manner. Polylactic-co-glycolic acid (PLGA) is one of the extensively researched synthetic biodegradable polymers due to its favorable properties. It is also known as a ‘Smart Polymer’ due to its stimuli sensitive behavior. A wide range of PLGA-based drug delivery systems have been reported for the treatment or diagnosis of various diseases and disorders. The present review provides an overview of the chemistry, physicochemical properties, biodegradation behavior, evaluation parameters and applications of PLGA in drug delivery. Different drug–polymer combinations developed into drug delivery or carrier systems are enumerated and discussed.
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Abstract
Autologous nerve grafts are the current criterion standard for repair of peripheral nerve injuries when the transected nerve ends are not amenable to primary end-to-end tensionless neurorrhaphy. However, donor-site morbidities such as neuroma formation and permanent loss of function have led to tremendous interest in developing an alternative to this technique. Artificial nerve conduits have therefore emerged as an alternative to autologous nerve grafting for the repair of short peripheral nerve defects of less than 30 mm; however, they do not yet surpass autologous nerve grafts clinically. A thorough understanding of the complex biological reactions that take place during peripheral nerve regeneration will allow researchers to develop a nerve conduit with physical and biological properties similar to those of an autologous nerve graft that supports regeneration over long nerve gaps and in large-diameter nerves. In this article, the authors assess the currently available nerve conduits, summarize research in the field of developing these conduits, and establish areas within this field in which further research would prove most beneficial.
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Chen BY, Wang YS, Mi HY, Yu P, Kuang TR, Peng XF, Wen JS. Effect of poly(ethylene glycol) on the properties and foaming behavior of macroporous poly(lactic acid)/sodium chloride scaffold. J Appl Polym Sci 2014. [DOI: 10.1002/app.41181] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Bin-Yi Chen
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
| | - Yuan-Sheng Wang
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
| | - Hao-Yang Mi
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
| | - Peng Yu
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
| | - Tai-Rong Kuang
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
| | - Xiang-Fang Peng
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
| | - Jing-Song Wen
- School of Mechanical and Automotive Engineering, National Engineering Research Center of Novel Equipment for Polymer Processing; Key Laboratory of Polymer Processing Engineering of Ministry of Education, South China University of Technology; Guangzhou 510640 China
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