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Markel DC, Powell D, Wu B, Pawlitz P, Bou-Akl T, Chen L, Shi T, Ren W. Therapeutic Efficacy of an Erythromycin-Loaded Coaxial Nanofiber Coating in a Rat Model of S. aureus-Induced Periprosthetic Joint Infection. Int J Mol Sci 2024; 25:7926. [PMID: 39063169 PMCID: PMC11276967 DOI: 10.3390/ijms25147926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 07/11/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Implant surface nanofiber (NF) coatings represent an alternative way to prevent/treat periprosthetic joint infection (PJI) via local drug release. We developed and characterized a coaxial erythromycin (EM)-doped PLGA/PCL-PVA NF coating. The purpose of this study was to determine the efficacy of EM-NF coatings (EM0, no EM, EM100 (100 mg/mL), and EM1000 (1000 mg/mL) wt/wt) in a rat PJI model. A strong bond of the EM-NF coating to the surface of titanium (Ti) pins was confirmed by in vitro mechanical testing. Micro-computed tomography (mCT) analysis showed that both EM100 and EM1000 NF effectively reduced periprosthetic osteolysis compared to EM0 at 8 and 16 weeks after implantation. Histology showed that EM100 and EM1000 coatings effectively controlled infection and enhanced periprosthetic new bone formation. The bone implant contact (BIC) of EM100 (35.08%) was higher than negative controls and EM0 (3.43% and 0%, respectively). The bone area fraction occupancy (BAFO) of EM100 (0.63 mm2) was greater than controls and EM0 (0.390 mm2 and 0.0 mm2, respectively). The BAFO of EM100 was higher than that of EM1000 (0.3 mm2). These findings may provide a basis for a new implant surface fabrication strategy aimed at reducing the risks of defective osseointegration and PJI.
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Affiliation(s)
- David C. Markel
- The CORE Institute, 26750 Providence Pkwy #200, Novi, MI 48374, USA;
- Department of Biomedical Engineering, Wayne State University, 818 W. Hancock, Detroit, MI 48201, USA; (L.C.); (T.S.)
- Section of Orthopaedic Surgery, Ascension Providence Hospital Orthopaedic Research Laboratory, 16001 West Nine Mile Road, Southfield, MI 48075, USA; (D.P.); (B.W.); (P.P.); (W.R.)
| | - Dexter Powell
- Section of Orthopaedic Surgery, Ascension Providence Hospital Orthopaedic Research Laboratory, 16001 West Nine Mile Road, Southfield, MI 48075, USA; (D.P.); (B.W.); (P.P.); (W.R.)
| | - Bin Wu
- Section of Orthopaedic Surgery, Ascension Providence Hospital Orthopaedic Research Laboratory, 16001 West Nine Mile Road, Southfield, MI 48075, USA; (D.P.); (B.W.); (P.P.); (W.R.)
| | - Paula Pawlitz
- Section of Orthopaedic Surgery, Ascension Providence Hospital Orthopaedic Research Laboratory, 16001 West Nine Mile Road, Southfield, MI 48075, USA; (D.P.); (B.W.); (P.P.); (W.R.)
| | - Therese Bou-Akl
- Section of Orthopaedic Surgery, Ascension Providence Hospital Orthopaedic Research Laboratory, 16001 West Nine Mile Road, Southfield, MI 48075, USA; (D.P.); (B.W.); (P.P.); (W.R.)
| | - Liang Chen
- Department of Biomedical Engineering, Wayne State University, 818 W. Hancock, Detroit, MI 48201, USA; (L.C.); (T.S.)
| | - Tong Shi
- Department of Biomedical Engineering, Wayne State University, 818 W. Hancock, Detroit, MI 48201, USA; (L.C.); (T.S.)
| | - Weiping Ren
- Section of Orthopaedic Surgery, Ascension Providence Hospital Orthopaedic Research Laboratory, 16001 West Nine Mile Road, Southfield, MI 48075, USA; (D.P.); (B.W.); (P.P.); (W.R.)
- John D. Dingell VA Medical Center, 4646 John R St., Detroit, MI 48201, USA
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Webb CWB, D'Costa K, Tawagi E, Antonyshyn JA, Hofer OPS, Santerre JP. Electrospun methacrylated natural/synthetic composite membranes for gingival tissue engineering. Acta Biomater 2024; 173:336-350. [PMID: 37989435 DOI: 10.1016/j.actbio.2023.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 11/23/2023]
Abstract
New functional materials for engineering gingival tissue are still in the early stages of development. Materials for such applications must maintain volume and have advantageous mechanical and biological characteristics for tissue regeneration, to be an alternative to autografts, which are the current benchmark of care. In this work, methacrylated gelatin (GelMa) was photocrosslinked with synthetic immunomodulatory methacrylated divinyl urethanes and defined monomers to generate composite scaffolds. Using a factorial design, with the synthetic monomers of a degradable polar/hydrophobic/ionic polyurethane (D-PHI) and GelMa, composite materials were electrospun with polycarbonate urethane (PCNU) and light-cured in-flight. The materials had significantly different relative hydrophilicities, with unique biodegradation profiles associated with specific formulations, thereby providing good guidance to achieving desired mechanical characteristics and scaffold resorption for gingival tissue regeneration. In accelerated esterase/collagenase degradation models, the new materials exhibited an initial rapid weight loss followed by a more gradual rate of degradation. The degradation profile allowed for the early infiltration of human adipose-derived stromal/stem cells, while still enabling the graft's structural integrity to be maintained. In conclusion, the materials provide a promising candidate platform for the regeneration of oral soft tissues, addressing the requirement of viable tissue infiltration while maintaining volume and mechanical integrity. STATEMENT OF SIGNIFICANCE: There is a need for the development of more functional and efficacious materials for the treatment of gingival recession. To address significant limitations in current material formulations, we sought to investigate the development of methacrylated gelatin (GelMa) and oligo-urethane/methacrylate monomer composite materials. A factorial design was used to electrospin four new formulations containing four to five monomers. Synthetic immunomodulatory monomers were crosslinked with GelMa and electrospun with a polycarbonate urethane resulting in unique mechanical properties, and resorption rates which align with the original design criteria for gingival tissue engineering. The materials may have applications in tissue engineering and can be readily manufactured. The findings of this work may help better direct the efforts of tissue engineering and material manufacturing.
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Affiliation(s)
- C W Brian Webb
- Faculty of Dentistry, University of Toronto, 124 Edward St, M5G 1X3, Canada; Institute of Biomedical Engineering, University of Toronto, 164 College St Room 407, M5S 3G9, Canada
| | - Katya D'Costa
- Institute of Biomedical Engineering, University of Toronto, 164 College St Room 407, M5S 3G9, Canada
| | - Eric Tawagi
- Institute of Biomedical Engineering, University of Toronto, 164 College St Room 407, M5S 3G9, Canada
| | - Jeremy A Antonyshyn
- Institute of Biomedical Engineering, University of Toronto, 164 College St Room 407, M5S 3G9, Canada
| | - O P Stefan Hofer
- Division of Plastic and Reconstructive Surgery, University of Toronto, 149 College Street 5th Floor, M5T 1P5, Canada; Department of Surgery and Surgical Oncology, University Health Network, 190 Elizabeth St 1st Floor, M5G 2C4, Canada
| | - J Paul Santerre
- Faculty of Dentistry, University of Toronto, 124 Edward St, M5G 1X3, Canada; Institute of Biomedical Engineering, University of Toronto, 164 College St Room 407, M5S 3G9, Canada.
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Liu S, Al-Danakh A, Wang H, Sun Y, Wang L. Advancements in scaffold for treating ligament injuries; in vitro evaluation. Biotechnol J 2024; 19:e2300251. [PMID: 37974555 DOI: 10.1002/biot.202300251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 11/07/2023] [Accepted: 11/15/2023] [Indexed: 11/19/2023]
Abstract
Tendon/ligament (T/L) injuries are a worldwide health problem that affects millions of people annually. Due to the characteristics of tendons, the natural rehabilitation of their injuries is a very complex and lengthy process. Surgical treatment of a T/L injury frequently necessitates using autologous or allogeneic grafts or synthetic materials. Nonetheless, these alternatives have limitations in terms of mechanical properties and histocompatibility, and they do not permit the restoration of the original biological function of the tissue, which can negatively impact the patient's quality of life. It is crucial to find biological materials that possess the necessary properties for the successful surgical treatment of tissues and organs. In recent years, the in vitro regeneration of tissues and organs from stem cells has emerged as a promising approach for preparing autologous tissue and organs, and cell culture scaffolds play a critical role in this process. However, the biological traits and serviceability of different materials used for cell culture scaffolds vary significantly, which can impact the properties of the cultured tissues. Therefore, this review aims to analyze the differences in the biological properties and suitability of various materials based on scaffold characteristics such as cell compatibility, degradability, textile technologies, fiber arrangement, pore size, and porosity. This comprehensive analysis provides valuable insights to aid in the selection of appropriate scaffolds for in vitro tissue and organ culture.
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Affiliation(s)
- Shuang Liu
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Abdullah Al-Danakh
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Haowen Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Yuan Sun
- Liaoning Laboratory of Cancer Genomics and Department of Cell Biology, Dalian Medical University, Dalian, China
| | - Lina Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, China
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Theodorou CM, Taylor A, Lee SY, Cortez LM, Fu H, Pivetti CD, Zhang C, Stasyuk A, Hao D, Kumar P, Farmer DL, Liao J, Brown EG, Hong Y, Wang A. Evaluation of a biodegradable polyurethane patch for repair of diaphragmatic hernia in a rat model: A pilot study. J Pediatr Surg 2023; 58:964-970. [PMID: 36797111 PMCID: PMC10184880 DOI: 10.1016/j.jpedsurg.2023.01.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 01/08/2023] [Indexed: 01/20/2023]
Abstract
INTRODUCTION Congenital diaphragmatic hernia (CDH) repair is an area of active research. Large defects requiring patches have a hernia recurrence rate of up to 50%. We designed a biodegradable polyurethane (PU)-based elastic patch that matches the mechanical properties of native diaphragm muscle. We compared the PU patch to a non-biodegradable Gore-Tex™ (polytetrafluoroethylene) patch. METHODS The biodegradable polyurethane was synthesized from polycaprolactone, hexadiisocyanate and putrescine, and then processed into fibrous PU patches by electrospinning. Rats underwent 4 mm diaphragmatic hernia (DH) creation via laparotomy followed by immediate repair with Gore-Tex™ (n = 6) or PU (n = 6) patches. Six rats underwent sham laparotomy without DH creation/repair. Diaphragm function was evaluated by fluoroscopy at 1 and 4 weeks. At 4 weeks, animals underwent gross inspection for recurrence and histologic evaluation for inflammatory reaction to the patch materials. RESULTS There were no hernia recurrences in either cohort. Gore-Tex™ had limited diaphragm rise compared to sham at 4 weeks (1.3 mm vs 2.9 mm, p = 0.003), but no difference was found between PU and sham (1.7 mm vs 2.9 mm, p = 0.09). There were no differences between PU and Gore-Tex™ at any time point. Both patches formed an inflammatory capsule, with similar thicknesses between cohorts on the abdominal (Gore-Tex™ 0.07 mm vs. PU 0.13 mm, p = 0.39) and thoracic (Gore-Tex™ 0.3 mm vs. PU 0.6 mm, p = 0.09) sides. CONCLUSION The biodegradable PU patch allowed for similar diaphragmatic excursion compared to control animals. There were similar inflammatory responses to both patches. Further work is needed to evaluate long-term functional outcomes and further optimize the properties of the novel PU patch in vitro and in vivo. LEVEL OF EVIDENCE Level II, Prospective Comparative Study.
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Affiliation(s)
- Christina M Theodorou
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA
| | - Alan Taylor
- Department of Bioengineering, University of Texas at Arlington, 500 UTA Blvd, Arlington, TX 76019, USA
| | - Su Yeon Lee
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA
| | - Lia Molina Cortez
- Department of Bioengineering, University of Texas at Arlington, 500 UTA Blvd, Arlington, TX 76019, USA
| | - Huikang Fu
- Department of Bioengineering, University of Texas at Arlington, 500 UTA Blvd, Arlington, TX 76019, USA
| | - Christopher D Pivetti
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, 2425 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Chaoxing Zhang
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, 2425 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Anastasiya Stasyuk
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA
| | - Dake Hao
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, 2425 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Priyadarsini Kumar
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, 2425 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Diana L Farmer
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, 2425 Stockton Blvd, Sacramento, CA, 95817, USA
| | - Jun Liao
- Department of Bioengineering, University of Texas at Arlington, 500 UTA Blvd, Arlington, TX 76019, USA
| | - Erin G Brown
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA
| | - Yi Hong
- Department of Bioengineering, University of Texas at Arlington, 500 UTA Blvd, Arlington, TX 76019, USA.
| | - Aijun Wang
- Center for Surgical Bioengineering, Department of Surgery, School of Medicine, University of California Davis, 4625 2nd Avenue, Room 3001, Sacramento, CA, 95817, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, 2425 Stockton Blvd, Sacramento, CA, 95817, USA; Department of Biomedical Engineering, University of California Davis, One Shields Ave, Davis, CA, 95616, USA.
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5
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Ren W, Yu X, Chen L, Shi T, Bou-Akl T, Markel DC. Osteoblastic differentiation and bactericidal activity are enhanced by erythromycin released from PCL/PLGA-PVA coaxial nanofibers. J Biomater Appl 2022; 37:712-723. [PMID: 35624088 DOI: 10.1177/08853282221105676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Prosthesis with antibiotic-eluting nanofibrous (NF) coating represents coating alternative to prevent periprosthetic joint infection (PJI). In this study, four formulas of erythromycin (EM)-embedded both in core and sheath components of coaxial PCL/PLGA-PVA NF coatings were developed: EM 0 (no EM), EM 100 (100 μg/mL), EM500 (500 μg/mL) and EM1000 (1000 μg/mL). EM doping altered the physicochemical and structural properties of NFs to some extent, including the increase of NF porosity and surface wettability. A sustained EM release from EM-NFs for >4 weeks was observed. Eluents collected from EM-NFs showed strong zone of inhibition (ZOI) to Staphylococcus aureus growth and the sizes of ZOI positively related to the amount of EM released. EM-NFs were nontoxic to rat bone marrow stem cells (rBMSCs). Cell growth was significantly enhanced when comparing rBMSCs cultured on EM-NFs (EM0 and EM 100) to those cultured on NF-free control. Cell differentiation (ALP activity) was notably enhanced by EM100, compared to control and EM0. Eluents from EM-NFs on rBMSCs were also investigated. The presence of 10% EM-NF eluents inhibited the growth of rBMSCs, which was proportional to the amount of EM doped. The ALP activity was notably enhanced by eluents from EM-NFs with the highest activity in EM100 compared to control and EM0. Our data indicate that EM-doped PCL/PLGA-PVA coaxial NF coatings have a great potential to be applied as a new implant coating matrices. Further in vivo testing in animal models is currently planned that should represent the first step in predicting the clinical outcomes of EM-eluting NF coating approach.
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Affiliation(s)
- Weiping Ren
- Department of Orthopedic, 7432Ascension Providence Hospital, Southfield, MI, USA.,20036John D Dingle VA Medical Center, Detroit, MI, USA.,Biomedical Engineering, 2954Wayne State University, Detroit, MI, USA
| | - Xiaowei Yu
- Department of Orthopedics, 378725Shanghai 6th People's Hospital Jiaotong University, China
| | - Liang Chen
- Biomedical Engineering, 2954Wayne State University, Detroit, MI, USA
| | - Tong Shi
- Biomedical Engineering, 2954Wayne State University, Detroit, MI, USA
| | - Therese Bou-Akl
- Department of Orthopedic, 7432Ascension Providence Hospital, Southfield, MI, USA.,Biomedical Engineering, 2954Wayne State University, Detroit, MI, USA
| | - David C Markel
- Department of Orthopedic, 7432Ascension Providence Hospital, Southfield, MI, USA.,Biomedical Engineering, 2954Wayne State University, Detroit, MI, USA.,480289The Core Institute, Novi, MI, USA
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Webb BCW, Glogauer M, Santerre JP. The Structure and Function of Next-Generation Gingival Graft Substitutes-A Perspective on Multilayer Electrospun Constructs with Consideration of Vascularization. Int J Mol Sci 2022; 23:ijms23095256. [PMID: 35563649 PMCID: PMC9099797 DOI: 10.3390/ijms23095256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/05/2022] [Accepted: 05/06/2022] [Indexed: 12/10/2022] Open
Abstract
There is a shortage of suitable tissue-engineered solutions for gingival recession, a soft tissue defect of the oral cavity. Autologous tissue grafts lead to an increase in morbidity due to complications at the donor site. Although material substitutes are available on the market, their development is early, and work to produce more functional material substitutes is underway. The latter materials along with newly conceived tissue-engineered substitutes must maintain volumetric form over time and have advantageous mechanical and biological characteristics facilitating the regeneration of functional gingival tissue. This review conveys a comprehensive and timely perspective to provide insight towards future work in the field, by linking the structure (specifically multilayered systems) and function of electrospun material-based approaches for gingival tissue engineering and regeneration. Electrospun material composites are reviewed alongside existing commercial material substitutes’, looking at current advantages and disadvantages. The importance of implementing physiologically relevant degradation profiles and mechanical properties into the design of material substitutes is presented and discussed. Further, given that the broader tissue engineering field has moved towards the use of pre-seeded scaffolds, a review of promising cell options, for generating tissue-engineered autologous gingival grafts from electrospun scaffolds is presented and their potential utility and limitations are discussed.
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Affiliation(s)
- Brian C. W. Webb
- Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON M5G 1G6, Canada; (B.C.W.W.); (M.G.)
- Institute of Biomedical Engineering, University of Toronto, 164 Collage St Room 407, Toronto, ON M5S 3G9, Canada
| | - Michael Glogauer
- Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON M5G 1G6, Canada; (B.C.W.W.); (M.G.)
| | - J. Paul Santerre
- Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON M5G 1G6, Canada; (B.C.W.W.); (M.G.)
- Institute of Biomedical Engineering, University of Toronto, 164 Collage St Room 407, Toronto, ON M5S 3G9, Canada
- Correspondence:
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Tendon Tissue Repair in Prospective of Drug Delivery, Regenerative Medicines, and Innovative Bioscaffolds. Stem Cells Int 2021; 2021:1488829. [PMID: 34824586 PMCID: PMC8610661 DOI: 10.1155/2021/1488829] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 09/09/2021] [Indexed: 02/06/2023] Open
Abstract
The natural healing capacity of the tendon tissue is limited due to the hypovascular and cellular nature of this tissue. So far, several conventional approaches have been tested for tendon repair to accelerate the healing process, but all these approaches have their own advantages and limitations. Regenerative medicine and tissue engineering are interdisciplinary fields that aspire to develop novel medical devices, innovative bioscaffold, and nanomedicine, by combining different cell sources, biodegradable materials, immune modulators, and nanoparticles for tendon tissue repair. Different studies supported the idea that bioscaffolds can provide an alternative for tendon augmentation with an enormous therapeutic potentiality. However, available data are lacking to allow definitive conclusion on the use of bioscaffolds for tendon regeneration and repairing. In this review, we provide an overview of the current basic understanding and material science in the field of bioscaffolds, nanomedicine, and tissue engineering for tendon repair.
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Biomaterials and Meniscal Lesions: Current Concepts and Future Perspective. Pharmaceutics 2021; 13:pharmaceutics13111886. [PMID: 34834301 PMCID: PMC8617690 DOI: 10.3390/pharmaceutics13111886] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/29/2021] [Accepted: 11/04/2021] [Indexed: 11/16/2022] Open
Abstract
Menisci are crucial structures for knee homeostasis. After a meniscal lesion, the golden rule, now, is to save as much meniscus as possible; only the meniscus tissue that is identified as unrepairable should be excised, and meniscal sutures find more and more indications. Several different methods have been proposed to improve meniscal healing. They include very basic techniques, such as needling, abrasion, trephination and gluing, or more complex methods, such as synovial flaps, meniscal wrapping or the application of fibrin clots. Basic research of meniscal substitutes has also become very active in the last decades. The aim of this literature review is to analyze possible therapeutic and surgical options that go beyond traditional meniscal surgery: from scaffolds, which are made of different kind of polymers, such as natural, synthetic or hydrogel components, to new technologies, such as 3-D printing construct or hybrid biomaterials made of scaffolds and specific cells. These recent advances show that there is great interest in the development of new materials for meniscal reconstruction and that, with the development of new biomaterials, there will be the possibility of better management of meniscal injuries
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Zhang K, Fang X, Zhu J, Yang R, Wang Y, Zhao W, Mo X, Fu Q. Effective Reconstruction of Functional Urethra Promoted With ICG-001 Delivery Using Core-Shell Collagen/Poly(Llactide-co-caprolactone) [P(LLA-CL)] Nanoyarn-Based Scaffold: A Study in Dog Model. Front Bioeng Biotechnol 2020; 8:774. [PMID: 32754582 PMCID: PMC7381300 DOI: 10.3389/fbioe.2020.00774] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/18/2020] [Indexed: 11/17/2022] Open
Abstract
Hypospadias and urethral stricture are common urological diseases which seriously affect voiding function and life quality of the patients, yet current clinical treatments often result in unsatisfactory clinical outcome with frequent complications. In vitro experiments confirmed that ICG-001 (a well-established Wnt signaling inhibitor) could effectively suppress fibroblast proliferation and fibrotic protein expression. In this study, we applied a novel drug-delivering nanoyarn scaffold in urethroplasty in dog model, which continuously delivers ICG-001 during tissue reconstruction, and could effectively promote urethral recovery and resume fully functional urethra within 12 weeks. Such attempts are essential to the development of regenerative medicine for urological disorders and for broader clinical applications in human patients.
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Affiliation(s)
- Kaile Zhang
- Department of Urology, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaolan Fang
- Diagnostic Laboratory, Greenwood Genetic Center, Greenwood, SC, United States
| | - Jingjing Zhu
- Biomaterials and Tissue Engineering Laboratory, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Ranxing Yang
- Department of Urology, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Ying Wang
- Department of Urology, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Weixin Zhao
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, NC, United States
| | - Xiumei Mo
- Biomaterials and Tissue Engineering Laboratory, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Qiang Fu
- Department of Urology, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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10
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The effect of aligned electrospun fibers and macromolecular crowding in tenocyte culture. Methods Cell Biol 2020; 157:225-247. [DOI: 10.1016/bs.mcb.2019.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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11
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Schilling K, El Khatib M, Plunkett S, Xue J, Xia Y, Vinogradov SA, Brown E, Zhang X. Electrospun Fiber Mesh for High-Resolution Measurements of Oxygen Tension in Cranial Bone Defect Repair. ACS APPLIED MATERIALS & INTERFACES 2019; 11:33548-33558. [PMID: 31436082 PMCID: PMC6916729 DOI: 10.1021/acsami.9b08341] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Tissue oxygenation is one of the key determining factors in bone repair and bone tissue engineering. Adequate tissue oxygenation is essential for survival and differentiation of the bone-forming cells and ultimately the success of bone tissue regeneration. Two-photon phosphorescence lifetime microscopy (2PLM) has been successfully applied in the past to image oxygen distributions in tissue with high spatial resolution. However, delivery of phosphorescent probes into avascular compartments, such as those formed during early bone defect healing, poses significant problems. Here, we report a multifunctional oxygen-reporting fibrous matrix fabricated through encapsulation of a hydrophilic oxygen-sensitive, two-photon excitable phosphorescent probe, PtP-C343, in the core of fibers during coaxial electrospinning. The oxygen-sensitive fibers support bone marrow stromal cell growth and differentiation and at the same time enable real-time high-resolution probing of partial pressures of oxygen via 2PLM. The hydrophilicity of the probe facilitates its gradual release into the nearby microenvironment, allowing fibers to act as a vehicle for probe delivery into the healing tissue. In conjunction with a cranial defect window chamber model, which permits simultaneous imaging of the bone and neovasculature in vivo via two-photon laser scanning microscopy, the oxygen-reporting fibers provide a useful tool for minimally invasive, high-resolution, real-time 3D mapping of tissue oxygenation during bone defect healing, facilitating studies aimed at understanding the healing process and advancing design of tissue-engineered constructs for enhanced bone repair and regeneration.
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Affiliation(s)
- Kevin Schilling
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14620, USA
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY 146421, USA
| | - Mirna El Khatib
- Departments of Biochemistry and Biophysics and of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Shane Plunkett
- Departments of Biochemistry and Biophysics and of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jiajia Xue
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
| | - Sergei A. Vinogradov
- Departments of Biochemistry and Biophysics and of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
- Corresponding authors contact information: Xinping Zhang, The Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA, ; Edward Brown, Department of Biomedical Engineering, University of Rochester, Goergen Hall Box 270168Rochester, NY 14642, USA, ; Sergei A. Vinogradov, Department of Biochemistry and Biophysics, Perelman School of Medicine, Department of Chemistry, School of Arts and Sciences University of Pennsylvania Philadelphia, PA 19104,
| | - Edward Brown
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14620, USA
- Corresponding authors contact information: Xinping Zhang, The Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA, ; Edward Brown, Department of Biomedical Engineering, University of Rochester, Goergen Hall Box 270168Rochester, NY 14642, USA, ; Sergei A. Vinogradov, Department of Biochemistry and Biophysics, Perelman School of Medicine, Department of Chemistry, School of Arts and Sciences University of Pennsylvania Philadelphia, PA 19104,
| | - Xinping Zhang
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14620, USA
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY 146421, USA
- Corresponding authors contact information: Xinping Zhang, The Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA, ; Edward Brown, Department of Biomedical Engineering, University of Rochester, Goergen Hall Box 270168Rochester, NY 14642, USA, ; Sergei A. Vinogradov, Department of Biochemistry and Biophysics, Perelman School of Medicine, Department of Chemistry, School of Arts and Sciences University of Pennsylvania Philadelphia, PA 19104,
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12
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Yue H, Zhou L, Zou R, Li Z, Liao T, Yan J, Zhou Y, Yang M, Piao Z. Promotion of skin fibroblasts collagen synthesis by polydioxanone mats combined with concentrated growth factor extracts. J Biomater Appl 2019; 34:487-497. [PMID: 31234705 DOI: 10.1177/0885328219858456] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Haiqiong Yue
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Libin Zhou
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Rui Zou
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhicong Li
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ting Liao
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jing Yan
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yang Zhou
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Mi Yang
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhengguo Piao
- Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
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13
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Biocompatibility and biodegradation properties of polycaprolactone/polydioxanone composite scaffolds prepared by blend or co-electrospinning. J BIOACT COMPAT POL 2019. [DOI: 10.1177/0883911519835569] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Electrospun polymer scaffolds are regarded as an ideal tissue engineering scaffold due to similar morphological properties with the native extracellular matrix. Among these, polycaprolactone is widely used to fabricate electrospun fibrous scaffolds due to its excellent biocompatibility, good mechanical properties, and ease of manufacture. However, its low biodegradation rate has a negative influence on its application in tissue engineering scaffold. To address this issue, this study prepared hybrid scaffolds composed of polycaprolactone and polydioxanone (a fast-degrading polyether-ester) via either the blend or co-electrospinning. Subsequently, the structural characteristics, mechanical strength, in vitro/vivo degradation, cellularization, and vascularization of two kinds of hybrid scaffolds were evaluated to decide which method is more suitable for producing tissue engineering scaffolds. The incorporation of polydioxanone increased the mechanical strength of both composite scaffolds. Moreover, co-electrospun scaffolds exhibited improved hydrophilicity compared to blend scaffolds. The results of in vitro and in vivo degradation studies showed that the degradation rate of both composite scaffolds was faster than that of neat polycaprolactone scaffolds due to the incorporated polydioxanone component. Especially in co-electrospun scaffolds, the fast degradation of polydioxanone fiber gave rise to larger pore size, thus leading to faster cellularization and better vascularization compared to blend scaffolds. Therefore, co-electrospinning was demonstrated to be superior to blend electrospinning for the preparation of composite scaffolds. Co-electrospun polycaprolactone–polydioxanone scaffolds may be promising candidates for tissue engineering.
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14
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Nitti P, Gallo N, Natta L, Scalera F, Palazzo B, Sannino A, Gervaso F. Influence of Nanofiber Orientation on Morphological and Mechanical Properties of Electrospun Chitosan Mats. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:3651480. [PMID: 30538809 PMCID: PMC6260544 DOI: 10.1155/2018/3651480] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/05/2018] [Accepted: 10/24/2018] [Indexed: 12/22/2022]
Abstract
This work explored the use of chitosan (Cs) and poly(ethylene oxide) (PEO) blends for the fabrication of electrospun fiber-orientated meshes potentially suitable for engineering fiber-reinforced soft tissues such as tendons, ligaments, or meniscus. To mimic the fiber alignment present in native tissue, the CS/PEO blend solution was electrospun using a traditional static plate, a rotating drum collector, and a rotating disk collector to get, respectively, random, parallel, circumferential-oriented fibers. The effects of the different orientations (parallel or circumferential) and high-speed rotating collector influenced fiber morphology, leading to a reduction in nanofiber diameters and an improvement in mechanical properties.
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Affiliation(s)
- Paola Nitti
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
| | - Nunzia Gallo
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
| | - Lara Natta
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
| | - Francesca Scalera
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
| | - Barbara Palazzo
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
- Ghimas S.p.A. c/o Dhitech Scarl, Lecce 73100, Italy
| | - Alessandro Sannino
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
| | - Francesca Gervaso
- Department of Engineering for Innovation, University of Salento, Lecce 73100, Italy
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15
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Fernández-Colino A, Wolf F, Rütten S, Rodríguez-Cabello JC, Jockenhoevel S, Mela P. Combining Catalyst-Free Click Chemistry with Coaxial Electrospinning to Obtain Long-Term, Water-Stable, Bioactive Elastin-Like Fibers for Tissue Engineering Applications. Macromol Biosci 2018; 18:e1800147. [PMID: 30260568 DOI: 10.1002/mabi.201800147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 08/09/2018] [Indexed: 11/09/2022]
Abstract
Elastic fibers are a fundamental requirement for tissue-engineered equivalents of physiologically elastic native tissues. Here, a simple one-step electrospinning approach is developed, combining i) catalyst-free click chemistry, ii) coaxial electrospinning, and iii) recombinant elastin-like polymers as a relevant class of biomaterials. Water-stable elastin-like fibers are obtained without the use of cross-linking agents, catalysts, or harmful organic solvents. The fibers can be directly exposed to an aqueous environment at physiological temperature and their morphology maintained for at least 3 months. The bioactivity of the fibers is demonstrated with human vascular cells and the potential of the process for vascular tissue engineering is shown by fabricating small-diameter tubular fibrous scaffolds. Moreover, highly porous fluffy 3D constructs are obtained without the use of specially designed collectors or sacrificial materials, further supporting their applicability in the biomedical field. Ultimately, the strategy that is developed here may be applied to other click systems, contributing to expanding their potential in medical technology.
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Affiliation(s)
- Alicia Fernández-Colino
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstraße 55, 52074, Aachen, Germany
| | - Frederic Wolf
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstraße 55, 52074, Aachen, Germany
| | - Stephan Rütten
- Electron Microscopy Facility, Uniklinik RWTH Aachen, Pauwelsstrasse, 30, D-52074, Aachen, Germany
| | | | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstraße 55, 52074, Aachen, Germany.,Aachen-Maastricht-Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, 6167 RD, Geleen, The Netherlands
| | - Petra Mela
- Department of Biohybrid & Medical Textiles (BioTex), AME-Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Forckenbeckstraße 55, 52074, Aachen, Germany
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16
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Wang T, Zhai Y, Nuzzo M, Yang X, Yang Y, Zhang X. Layer-by-layer nanofiber-enabled engineering of biomimetic periosteum for bone repair and reconstruction. Biomaterials 2018; 182:279-288. [PMID: 30142527 DOI: 10.1016/j.biomaterials.2018.08.028] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 08/03/2018] [Accepted: 08/10/2018] [Indexed: 01/07/2023]
Abstract
Periosteum plays an indispensable role in bone repair and reconstruction. To recapitulate the remarkable regenerative capacity of periosteum, a biomimetic tissue-engineered periosteum (TEP) was constructed via layer-by-layer bottom-up strategy utilizing polycaprolactone (PCL), collagen, and nano-hydroxyapatite composite nanofiber sheets seeded with bone marrow stromal cells (BMSCs). When combined with a structural bone allograft to repair a 4 mm segmental bone defect created in the mouse femur, TEP restored donor-site periosteal bone formation, reversing the poor biomechanics of bone allograft healing at 6 weeks post-implantation. Further histologic analyses showed that TEP recapitulated the entire periosteal bone repair process, as evidenced by donor-dependent formation of bone and cartilage, induction of distinct CD31high type H endothelium, reconstitution of bone marrow and remodeling of bone allografts. Compared to nanofiber sheets without BMSC seeding, TEP eliminated the fibrotic tissue capsule elicited by nanofiber sheets, leading to a marked improvement of osseointegration at the compromised periosteal site. Taken together, our study demonstrated a novel layer-by-layer engineering platform for construction of a versatile biomimetic periosteum, enabling further assembly of a multi-component and multifunctional periosteum replacement for bone defect repair and reconstruction.
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Affiliation(s)
- Tao Wang
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Yuankun Zhai
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Marc Nuzzo
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Xiaochuan Yang
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Yunpeng Yang
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, 14642, USA
| | - Xinping Zhang
- Center for Musculoskeletal Research, University of Rochester, School of Medicine and Dentistry, Rochester, NY, 14642, USA.
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17
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Strategic Design and Fabrication of Biomimetic 3D Scaffolds: Unique Architectures of Extracellular Matrices for Enhanced Adipogenesis and Soft Tissue Reconstruction. Sci Rep 2018; 8:5696. [PMID: 29632328 PMCID: PMC5890269 DOI: 10.1038/s41598-018-23966-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/23/2018] [Indexed: 01/16/2023] Open
Abstract
The higher rate of soft tissue impairment due to lumpectomy or other trauma greatly requires the restoration of the irreversibly lost subcutaneous adipose tissues. The nanofibers fabricated by conventional electrospinning provide only a superficial porous structure due to its sheet like 2D structure and thereby hinder the cell infiltration and differentiation throughout the scaffolds. Thus we developed a novel electrospun 3D membrane using the zwitterionic poly (carboxybetaine-co-methyl methacrylate) co-polymer (CMMA) through electrostatic repulsion based electrospinning for soft tissue engineering. The inherent charges in the CMMA will aid the nanofiber to directly transform into a semiconductor and thereby transfer the immense static electricity from the grounded collector and will impart greater fluffiness to the scaffolds. The results suggest that the fabricated 3D nanofiber (CMMA 3NF) scaffolds possess nanofibers with larger inter connected pores and less dense structure compared to the conventional 2D scaffolds. The CMMA 3NF exhibits significant cues of soft tissue engineering such as enhanced biocompatibility as well as the faster regeneration of cells. Moreover the fabricated 3D scaffolds greatly assist the cells to develop into its stereoscopic topographies with an enhanced adipogenic property.
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18
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Chan Park S, Kim MJ, Choi K, Kim J, Choi SO. Influence of shell compositions of solution blown PVP/PCL core–shell fibers on drug release and cell growth. RSC Adv 2018; 8:32470-32480. [PMID: 35547679 PMCID: PMC9086270 DOI: 10.1039/c8ra05485a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 09/01/2018] [Indexed: 12/27/2022] Open
Abstract
Developing a facile means of controlling drug release is of utmost interest in drug delivery systems. In this study, core–shell structured nanofibers containing a water-soluble porogen were fabricated via solution blow spinning, to be used as drug-loaded bioactive tissue scaffolds. Hydrophilic polyvinylpyrrolidone (PVP) and hydrophobic poly(ε-caprolactone) (PCL) were chosen to produce the core and the shell compartments of the fiber, respectively. In the core, a hydrophilic sulforhodamine B (SRB) dye was loaded as a model drug. In the PCL shell, two kinds of PVP with different molecular weights (40 kDa and 1300 kDa) were added, and the influence of PVP leaching on the SRB release and cell growth was investigated. The monolithic PCL-shelled fibers displayed a sustained SRB release with a weak burst effect. The addition of PVP in the shell induced a phase separation, forming microscale PVP domains. The PVP domain, acting as a porogen, was leached out in the medium and, as a result, the burst release of SRB was promoted. This burst effect was more prominent with the lower molecular weight PVP. The biocompatibility of the core–shell fibers was evaluated with human epidermal keratinocytes (HEK) by a cell viability assay and microscopic observation of cell proliferation. The HEK cells on fibers with a PVP/PCL composite shell formed self-assembled spherical clusters, displaying higher cell viability and proliferation than those on the monolithic PCL-shelled fibers that induced HEK cell growth in two-dimensional monolayers. The results demonstrate that the presence of hydrophilic porogens on tissue scaffolds can accelerate drug release and enhance cell proliferation by increasing surface wettability, roughness and porosity. The findings of this study provide a basic insight into the construction of bioactive three-dimensional tissue scaffolds. The presence of hydrophilic porogens on the surface of core–shell fibers can accelerate drug release and enhance cell proliferation.![]()
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Affiliation(s)
- Seok Chan Park
- Nanotechnology Innovation Center of Kansas State (NICKS)
- Kansas State University
- Manhattan
- USA
| | - Min Jung Kim
- Nanotechnology Innovation Center of Kansas State (NICKS)
- Kansas State University
- Manhattan
- USA
| | - Kyoungju Choi
- Nanotechnology Innovation Center of Kansas State (NICKS)
- Kansas State University
- Manhattan
- USA
- Department of Anatomy and Physiology
| | - Jooyoun Kim
- Department of Textiles
- Merchandising and Fashion Design
- College of Human Ecology
- Seoul National University
- Seoul
| | - Seong-O Choi
- Nanotechnology Innovation Center of Kansas State (NICKS)
- Kansas State University
- Manhattan
- USA
- Department of Anatomy and Physiology
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19
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Chiarini A, Freddi G, Liu D, Armato U, Dal Prà I. Biocompatible Silk Noil-Based Three-Dimensional Carded-Needled Nonwoven Scaffolds Guide the Engineering of Novel Skin Connective Tissue. Tissue Eng Part A 2017; 22:1047-60. [PMID: 27411949 DOI: 10.1089/ten.tea.2016.0124] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Retracting hypertrophic scars resulting from healed burn wounds heavily impact on the patients' life quality. Biomaterial scaffolds guiding burned-out skin regeneration could suppress or lessen scar retraction. Here we report a novel silk noil-based three-dimensional (3D) nonwoven scaffold produced by carding and needling with no formic acid exposure, which might improve burn healing. Once wetted, it displays human skin-like physical features and a high biocompatibility. Human keratinocyte-like cervical carcinoma C4-I cells seeded onto the carded-needled nonwovens in vitro quickly adhered to them, grew, and actively metabolized glutamine releasing lactate. As on plastic, they released no proinflammatory IL-1β, although secreting tumor necrosis factor-alpha, an inducer of the autocrine mitogen amphiregulin in such cells. Once grafted into interscapular subcutaneous tissue of mice, carded-needled nonwovens guided the afresh assembly of a connective tissue enveloping the fibroin microfibers and filling the interposed voids within 3 months. Fibroblasts and a few poly- or mononucleated macrophages populated the engineered tissue. Besides, its extracellular matrix contained thin sparse collagen fibrils and a newly formed vascular network whose endothelin-1-expressing endothelial cells grew first on the fibroin microfibrils and later expanded into the intervening matrix. Remarkably, no infiltrates of inflammatory leukocytes and no packed collagen fibers bundles among fibroin microfibers, no fibrous capsules at the grafts periphery, and hence no foreign body response was obtained at the end of 3 months of observation. Therefore, we posit that silk noil-based 3D carded-needled nonwoven scaffolds are tools for translational medicine studies as they could guide connective tissue regeneration at deep burn wounds averting scar retraction with good functional results.
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Affiliation(s)
- Anna Chiarini
- 1 Human Histology and Embryology Unit, University of Verona Medical School , Verona, Italy
| | | | - Daisong Liu
- 3 Burns Institute, Third Military Medical University , Chongqing, China
| | - Ubaldo Armato
- 1 Human Histology and Embryology Unit, University of Verona Medical School , Verona, Italy
| | - Ilaria Dal Prà
- 1 Human Histology and Embryology Unit, University of Verona Medical School , Verona, Italy
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20
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Mahmoudi M, Yu M, Serpooshan V, Wu JC, Langer R, Lee RT, Karp JM, Farokhzad OC. Multiscale technologies for treatment of ischemic cardiomyopathy. NATURE NANOTECHNOLOGY 2017; 12:845-855. [PMID: 28875984 PMCID: PMC5717755 DOI: 10.1038/nnano.2017.167] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 07/13/2017] [Indexed: 05/02/2023]
Abstract
The adult mammalian heart possesses only limited capacity for innate regeneration and the response to severe injury is dominated by the formation of scar tissue. Current therapy to replace damaged cardiac tissue is limited to cardiac transplantation and thus many patients suffer progressive decay in the heart's pumping capacity to the point of heart failure. Nanostructured systems have the potential to revolutionize both preventive and therapeutic approaches for treating cardiovascular disease. Here, we outline recent advancements in nanotechnology that could be exploited to overcome the major obstacles in the prevention of and therapy for heart disease. We also discuss emerging trends in nanotechnology affecting the cardiovascular field that may offer new hope for patients suffering massive heart attacks.
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Affiliation(s)
- Morteza Mahmoudi
- Center for Nanomedicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 13169-43551, Iran
| | - Mikyung Yu
- Center for Nanomedicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Vahid Serpooshan
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Joseph C. Wu
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Medicine, Division of Cardiology, Stanford University School of Medicine, Stanford, California 94305, USA
- Institute of Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Robert Langer
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Richard T. Lee
- Department of Stem Cell and Regenerative Biology, Harvard University, Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA
- Department of Medicine, Division of Cardiology, Brigham and Women’s Hospital and Harvard Medical School, Cambridge, Massachusetts 02138, USA
| | - Jeffrey M. Karp
- Center for Nanomedicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts 02139, USA
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA
| | - Omid C. Farokhzad
- Center for Nanomedicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 13169-43551, Iran
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21
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Tseng VCH, Chew CH, Huang WT, Wang YK, Chen KS, Chou SY, Chen CC. An Effective Cell Coculture Platform Based on the Electrospun Microtube Array Membrane for Nerve Regeneration. Cells Tissues Organs 2017; 204:179-190. [PMID: 28848167 DOI: 10.1159/000477238] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2017] [Indexed: 01/26/2023] Open
Abstract
Recently, a novel substrate known as an electrospun polylactic acid (PLLA) microtube array membrane (MTAM) was successfully developed as a cell coculture platform. Structurally, this substrate is made up of one-to-one connected, ultrathin, submicron scale fibers that are arranged in an arrayed formation. Its unique structure confers several key advantages which are beneficial in a cell coculture system. In this study, the interaction between rat fetal neural stem cells (NSC) and astrocytes was examined by comparing the outcome of a typical Transwell-based coculture system and that of an electrospun PLLA MTAM-based coculture system. Compared to tissue culture polystyrene (TCP) and Transwell coculture inserts, a superior cell viability of NSC was observed when cultured in lumens of electrospun PLLA MTAM (with supportive immunostaining images). Reverse transcription polymerase chain reaction revealed a strong interaction between astrocytes and NSC through a higher expression of doublecortin and a lower expression of nestin. These data demonstrate that MTAM is clearly a better coculture platform than the traditional Transwell system.
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Affiliation(s)
- V Chia-Hsuan Tseng
- Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, Taipei, Taiwan, ROC
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22
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Song W, Seta J, Chen L, Bergum C, Zhou Z, Kanneganti P, Kast RE, Auner GW, Shen M, Markel DC, Ren W, Yu X. Doxycycline-loaded coaxial nanofiber coating of titanium implants enhances osseointegration and inhibits Staphylococcus aureus infection. ACTA ACUST UNITED AC 2017; 12:045008. [PMID: 28357996 DOI: 10.1088/1748-605x/aa6a26] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Few studies have been reported that focus on developing implant surface nanofiber (NF) coating to prevent infection and enhance osseointegration by local drug release. In this study, coaxial doxycycline (Doxy)-doped polycaprolactone/polyvinyl alcohol (PCL/PVA) NFs were directly deposited on a titanium (Ti) implant surface during electrospinning. The interaction of loaded Doxy with both PVA and PCL NFs was characterized by Raman spectroscopy. The bonding strength of Doxy-doped NF coating on Ti implants was confirmed by a stand single-pass scratch test. The improved implant osseointegration by PCL/PVA NF coatings in vivo was confirmed by scanning electron microscopy, histomorphometry and micro computed tomography (μCT) at 2, 4 and 8 weeks after implantation. The bone contact surface (%) changes of the NF coating group (80%) is significantly higher than that of the no NF group (<5%, p < 0.05). Finally, we demonstrated that a Doxy-doped NF coating effectively inhibited bacterial infection and enhanced osseointegration in an infected (Staphylococcus aureus) tibia implantation rat model. Doxy released from NF coating inhibited bacterial growth up to 8 weeks in vivo. The maximal push-in force of the Doxy-NF coating (38 N) is much higher than that of the NF coating group (6.5 N) 8 weeks after implantation (p < 0.05), which was further confirmed by quantitative histological analysis and μCT. These findings indicate that coaxial PCL/PVA NF coating doped with Doxy and/or other drugs have great potential in enhancing implant osseointegration and preventing infection.
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Affiliation(s)
- Wei Song
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, United States of America
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23
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Peng S, Wu CW, Lin JY, Yang CY, Cheng MH, Chu IM. Promoting chondrocyte cell clustering through tuning of a poly(ethylene glycol)-poly(peptide) thermosensitive hydrogel with distinctive microarchitecture. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:181-189. [DOI: 10.1016/j.msec.2017.02.130] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 01/05/2017] [Accepted: 02/24/2017] [Indexed: 01/14/2023]
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24
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Kishan AP, Robbins AB, Mohiuddin SF, Jiang M, Moreno MR, Cosgriff-Hernandez EM. Fabrication of macromolecular gradients in aligned fiber scaffolds using a combination of in-line blending and air-gap electrospinning. Acta Biomater 2017; 56:118-128. [PMID: 28017867 DOI: 10.1016/j.actbio.2016.12.041] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 11/10/2016] [Accepted: 12/16/2016] [Indexed: 02/09/2023]
Abstract
Although a variety of fabrication methods have been developed to generate electrospun meshes with gradient properties, no platform has yet to achieve fiber alignment in the direction of the gradient that mimics the native tendon-bone interface. In this study, we present a method combining in-line blending and air-gap electrospinning to address this limitation in the field. A custom collector with synced rotation permitted fiber collection with uniform mesh thickness and periodic copper wires were used to induce fiber alignment. Two poly(ester urethane ureas) with different hard segment contents (BPUR 50, BPUR 10) were used to generate compositional gradient meshes with and without fiber alignment. The compositional gradient across the length of the mesh was characterized using a fluorescent dye and the results indicated a continuous transition from the BPUR 50 to the BPUR 10. As expected, the fiber alignment of the gradient meshes induced a corresponding alignment of adherent cells in static culture. Tensile testing of the sectioned meshes confirmed a graded transition in mechanical properties and an increase in anisotropy with fiber alignment. Finite element modeling was utilized to illustrate the gradient mechanical properties across the full length of the mesh and lay the foundation for future computational development work. Overall, these results indicate that this electrospinning method permits the fabrication of macromolecular gradients in the direction of fiber alignment and demonstrate its potential for use in interfacial tissue engineering. STATEMENT OF SIGNIFICANCE The native tendon-bone interface contains a gradient of properties that ensures stability of the joint. Without this transition, failure can occur due to stress concentration at the bone insertion site. Electrospinning is a method commonly used to produce fibrous grafts with gradient properties; however, no current method allows for gradients in the direction of fiber alignment. This work details a novel electrospinning method to produce gradients in the direction of fiber alignment in order to better mimic transitional zones and improve regeneration of the tendon-bone interface. In addition to the biomechanical gradients demonstrated here, this method may also be used to generate gradients of macromolecular, biochemical, and cellular cues with broad potential utility in tissue engineering.
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Small Diameter Blood Vessels Bioengineered From Human Adipose-derived Stem Cells. Sci Rep 2016; 6:35422. [PMID: 27739487 PMCID: PMC5064394 DOI: 10.1038/srep35422] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 09/23/2016] [Indexed: 12/17/2022] Open
Abstract
Bioengineering of small-diameter blood vessels offers a promising approach to reduce the morbidity associated with coronary artery and peripheral vascular disease. The aim of this study was to construct a two-layered small-diameter blood vessel using smooth muscle cells (SMCs) and endothelial cells (ECs) differentiated from human adipose-derived stem cells (hASCs). The outer layer was constructed with biodegradable polycaprolactone (PCL)-gelatin mesh seeded with SMCs, and this complex was then rolled around a silicone tube under pulsatile stimulation. After incubation for 6 to 8 weeks, the PCL-gelatin degraded and the luminal supporting silicone tube was removed. The smooth muscle layer was subsequently lined with ECs differentiated from hASCs after stimulation with VEGF and BMP4 in combination hypoxia. The phenotype of differentiated SMCs and ECs, and the cytotoxicity of the scaffold and biomechanical assessment were analyzed. Our results demonstrated that the two-layered bioengineered vessels exhibited biomechanical properties similar to normal human saphenous veins (HSV). Therefore, hASCs provide SMCs and ECs for bioengineering of small-diameter blood vessels.
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Kim BJ, Cheong H, Choi ES, Yun SH, Choi BH, Park KS, Kim IS, Park DH, Cha HJ. Accelerated skin wound healing using electrospun nanofibrous mats blended with mussel adhesive protein and polycaprolactone. J Biomed Mater Res A 2016; 105:218-225. [DOI: 10.1002/jbm.a.35903] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/12/2016] [Accepted: 09/14/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Bum Jin Kim
- Department of Chemical Engineering; Pohang University of Science and Technology; Pohang 790-784 Korea
| | - Hogyun Cheong
- Department of Chemical Engineering; Pohang University of Science and Technology; Pohang 790-784 Korea
| | - Eun-Som Choi
- Department of Plastic and Reconstructive Surgery; Daegu Catholic University Medical Center; Daegu 705-718 Korea
| | - So-Hee Yun
- Department of Plastic and Reconstructive Surgery; Daegu Catholic University Medical Center; Daegu 705-718 Korea
| | - Bong-Hyuk Choi
- Department of Chemical Engineering; Pohang University of Science and Technology; Pohang 790-784 Korea
| | - Ki-Soo Park
- Department of Plastic and Reconstructive Surgery; Daegu Catholic University Medical Center; Daegu 705-718 Korea
| | - Ick Soo Kim
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering, Interdisciplinary Cluster for Cutting Edge Research; Shinshu University; Ueda 386-8567 Japan
| | - Dae-Hwan Park
- Department of Plastic and Reconstructive Surgery; Daegu Catholic University Medical Center; Daegu 705-718 Korea
| | - Hyung Joon Cha
- Department of Chemical Engineering; Pohang University of Science and Technology; Pohang 790-784 Korea
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Zhang K, Guo X, Li Y, Fu Q, Mo X, Nelson K, Zhao W. Electrospun nanoyarn seeded with myoblasts induced from placental stem cells for the application of stress urinary incontinence sling: An in vitro study. Colloids Surf B Biointerfaces 2016; 144:21-32. [DOI: 10.1016/j.colsurfb.2016.03.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 03/24/2016] [Accepted: 03/30/2016] [Indexed: 02/09/2023]
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A Silk Fibroin and Peptide Amphiphile-Based Co-Culture Model for Osteochondral Tissue Engineering. Macromol Biosci 2016; 16:1212-26. [DOI: 10.1002/mabi.201600013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 04/09/2016] [Indexed: 11/07/2022]
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Abstract
Biomaterials have played an increasingly prominent role in the success of biomedical devices and in the development of tissue engineering, which seeks to unlock the regenerative potential innate to human tissues/organs in a state of deterioration and to restore or reestablish normal bodily function. Advances in our understanding of regenerative biomaterials and their roles in new tissue formation can potentially open a new frontier in the fast-growing field of regenerative medicine. Taking inspiration from the role and multi-component construction of native extracellular matrices (ECMs) for cell accommodation, the synthetic biomaterials produced today routinely incorporate biologically active components to define an artificial in vivo milieu with complex and dynamic interactions that foster and regulate stem cells, similar to the events occurring in a natural cellular microenvironment. The range and degree of biomaterial sophistication have also dramatically increased as more knowledge has accumulated through materials science, matrix biology and tissue engineering. However, achieving clinical translation and commercial success requires regenerative biomaterials to be not only efficacious and safe but also cost-effective and convenient for use and production. Utilizing biomaterials of human origin as building blocks for therapeutic purposes has provided a facilitated approach that closely mimics the critical aspects of natural tissue with regard to its physical and chemical properties for the orchestration of wound healing and tissue regeneration. In addition to directly using tissue transfers and transplants for repair, new applications of human-derived biomaterials are now focusing on the use of naturally occurring biomacromolecules, decellularized ECM scaffolds and autologous preparations rich in growth factors/non-expanded stem cells to either target acceleration/magnification of the body's own repair capacity or use nature's paradigms to create new tissues for restoration. In particular, there is increasing interest in separating ECMs into simplified functional domains and/or biopolymeric assemblies so that these components/constituents can be discretely exploited and manipulated for the production of bioscaffolds and new biomimetic biomaterials. Here, following an overview of tissue auto-/allo-transplantation, we discuss the recent trends and advances as well as the challenges and future directions in the evolution and application of human-derived biomaterials for reconstructive surgery and tissue engineering. In particular, we focus on an exploration of the structural, mechanical, biochemical and biological information present in native human tissue for bioengineering applications and to provide inspiration for the design of future biomaterials.
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Application of Wnt Pathway Inhibitor Delivering Scaffold for Inhibiting Fibrosis in Urethra Strictures: In Vitro and in Vivo Study. Int J Mol Sci 2015; 16:27659-76. [PMID: 26610467 PMCID: PMC4661908 DOI: 10.3390/ijms161126050] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/04/2015] [Accepted: 11/06/2015] [Indexed: 01/06/2023] Open
Abstract
Objective: To evaluate the mechanical property and biocompatibility of the Wnt pathway inhibitor (ICG-001) delivering collagen/poly(l-lactide-co-caprolactone) (P(LLA-CL)) scaffold for urethroplasty, and also the feasibility of inhibiting the extracellular matrix (ECM) expression in vitro and in vivo. Methods: ICG-001 (1 mg (2 mM)) was loaded into a (P(LLA-CL)) scaffold with the co-axial electrospinning technique. The characteristics of the mechanical property and drug release fashion of scaffolds were tested with a mechanical testing machine (Instron) and high-performance liquid chromatography (HPLC). Rabbit bladder epithelial cells and the dermal fibroblasts were isolated by enzymatic digestion method. (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) assay) and scanning electron microscopy (SEM) were used to evaluate the viability and proliferation of the cells on the scaffolds. Fibrolasts treated with TGF-β1 and ICG-001 released medium from scaffolds were used to evaluate the anti-fibrosis effect through immunofluorescence, real time PCR and western blot. Urethrography and histology were used to evaluate the efficacy of urethral implantation. Results: The scaffold delivering ICG-001 was fabricated, the fiber diameter and mechanical strength of scaffolds with inhibitor were comparable with the non-drug scaffold. The SEM and MTT assay showed no toxic effect of ICG-001 to the proliferation of epithelial cells on the collagen/P(LLA-CL) scaffold with ICG-001. After treatment with culture medium released from the drug-delivering scaffold, the expression of Collagen type 1, 3 and fibronectin of fibroblasts could be inhibited significantly at the mRNA and protein levels. In the results of urethrography, urethral strictures and fistulas were found in the rabbits treated with non-ICG-001 delivering scaffolds, but all the rabbits treated with ICG-001-delivering scaffolds showed wide caliber in urethras. Histology results showed less collagen but more smooth muscle and thicker epithelium in urethras repaired with ICG-001 delivering scaffolds. Conclusion: After loading with the Wnt signal pathway inhibitor ICG-001, the Collagen/P(LLA-CL) scaffold could facilitate a decrease in the ECM deposition of fibroblasts. The ICG-001 delivering Collagen/P(LLA-CL) nanofibrous scaffold seeded with epithelial cells has the potential to be a promising substitute material for urethroplasty. Longer follow-up study in larger animals is needed in the future.
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Tatman PD, Gerull W, Sweeney-Easter S, Davis JI, Gee AO, Kim DH. Multiscale Biofabrication of Articular Cartilage: Bioinspired and Biomimetic Approaches. TISSUE ENGINEERING PART B-REVIEWS 2015. [PMID: 26200439 DOI: 10.1089/ten.teb.2015.0142] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Articular cartilage is the load-bearing tissue found inside all articulating joints of the body. It vastly reduces friction and allows for smooth gliding between contacting surfaces. The structure of articular cartilage matrix and cellular composition is zonal and is important for its mechanical properties. When cartilage becomes injured through trauma or disease, it has poor intrinsic healing capabilities. The spectrum of cartilage injury ranges from isolated areas of the joint to diffuse breakdown and the clinical appearance of osteoarthritis. Current clinical treatment options remain limited in their ability to restore cartilage to its normal functional state. This review focuses on the evolution of biomaterial scaffolds that have been used for functional cartilage tissue engineering. In particular, we highlight recent developments in multiscale biofabrication approaches attempting to recapitulate the complex 3D matrix of native articular cartilage tissue. Additionally, we focus on the application of these methods to engineering each zone of cartilage and engineering full-thickness osteochondral tissues for improved clinical implantation. These methods have shown the potential to control individual cell-to-scaffold interactions and drive progenitor cell differentiation into a chondrocyte lineage. The use of these bioinspired nanoengineered scaffolds hold promise for recreation of structure and function on the whole tissue level and may represent exciting new developments for future clinical applications for cartilage injury and restoration.
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Affiliation(s)
- Philip David Tatman
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - William Gerull
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Sean Sweeney-Easter
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Jeffrey Isaac Davis
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Albert O Gee
- 2 Department of Orthopedics and Sports Medicine, University of Washington , Seattle, Washington
| | - Deok-Ho Kim
- 1 Department of Bioengineering, University of Washington , Seattle, Washington.,3 Institute for Stem Cell and Regenerative Medicine, University of Washington , Seattle, Washington
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Nair MS, Mony U, Menon D, Koyakutty M, Sidharthan N, Pavithran K, Nair SV, Menon KN. Development and molecular characterization of polymeric micro-nanofibrous scaffold of a defined 3-D niche for in vitro chemosensitivity analysis against acute myeloid leukemia cells. Int J Nanomedicine 2015; 10:3603-22. [PMID: 26028971 PMCID: PMC4440427 DOI: 10.2147/ijn.s80397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Standard in vitro drug testing employs 2-D tissue culture plate systems to test anti-leukemic drugs against cell adhesion-mediated drug-resistant leukemic cells that harbor in 3-D bone marrow microenvironments. This drawback necessitates the fabrication of 3-D scaffolds that have cell adhesion-mediated drug-resistant properties similar to in vivo niches. We therefore aimed at exploiting the known property of polyurethane (PU)/poly-l-lactic acid (PLLA) in forming a micro-nanofibrous structure to fabricate unique, not presented before, as far as we are aware, 3-D micro-nanofibrous scaffold composites using a thermally induced phase separation technique. Among the different combinations of PU/PLLA composites generated, the unique PU/PLLA 60:40 composite displayed micro-nanofibrous morphology similar to decellularized bone marrow with increased protein and fibronectin adsorption. Culturing of acute myeloid leukemia (AML) KG1a cells in FN-coated PU/PLLA 60:40 shows increased cell adhesion and cell adhesion-mediated drug resistance to the drugs cytarabine and daunorubicin without changing the original CD34+/CD38−/CD33− phenotype for 168 hours compared to fibronectin tissue culture plate systems. Molecularly, as seen in vivo, increased chemoresistance is associated with the upregulation of anti-apoptotic Bcl2 and the cell cycle regulatory protein p27Kip1 leading to cell growth arrest. Abrogation of Bcl2 activity by the Bcl2-specific inhibitor ABT 737 led to cell death in the presence of both cytarabine and daunorubicin, demonstrating that the cell adhesion-mediated drug resistance induced by Bcl2 and p27Kip1 in the scaffold was similar to that seen in vivo. These results thus show the utility of a platform technology, wherein drug testing can be performed before administering to patients without the necessity for stromal cells.
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Affiliation(s)
- Maya S Nair
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Ullas Mony
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Deepthy Menon
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Manzoor Koyakutty
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Neeraj Sidharthan
- Department of Oncology, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Keechilat Pavithran
- Department of Oncology, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Shantikumar V Nair
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham University, Kerala, India
| | - Krishnakumar N Menon
- Amrita Centre for Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham University, Kerala, India
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Baek J, Chen X, Sovani S, Jin S, Grogan SP, D’Lima DD. Meniscus tissue engineering using a novel combination of electrospun scaffolds and human meniscus cells embedded within an extracellular matrix hydrogel. J Orthop Res 2015; 33:572-83. [PMID: 25640671 PMCID: PMC4386835 DOI: 10.1002/jor.22802] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 12/08/2014] [Indexed: 02/04/2023]
Abstract
Meniscus injury and degeneration have been linked to the development of secondary osteoarthritis (OA). Therapies that successfully repair or replace the meniscus are, therefore, likely to prevent or delay OA progression. We investigated the novel approach of building layers of aligned polylactic acid (PLA) electrospun (ES) scaffolds with human meniscus cells embedded in extracellular matrix (ECM) hydrogel to lead to formation of neotissues that resemble meniscus-like tissue. PLA ES scaffolds with randomly oriented or aligned fibers were seeded with human meniscus cells derived from vascular or avascular regions. Cell viability, cell morphology, and gene expression profiles were monitored via confocal microscopy, scanning electron microscopy (SEM), and real-time polymerase chain reaction (PCR), respectively. Seeded scaffolds were used to produce multilayered constructs and were examined via histology and immunohistochemistry. Morphology and mechanical properties of PLA scaffolds (with and without cells) were influenced by fiber direction of the scaffolds. Both PLA scaffolds supported meniscus tissue formation with increased COL1A1, SOX9, and COMP, yet no difference in gene expression was found between random and aligned PLA scaffolds. Overall, ES materials, which possess mechanical strength of meniscus and can support neotissue formation, show potential for use in cell-based meniscus regeneration strategies.
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Affiliation(s)
- Jihye Baek
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA,Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California
| | - Xian Chen
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA
| | - Sujata Sovani
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA
| | - Sungho Jin
- Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California
| | - Shawn P Grogan
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA
| | - Darryl D D’Lima
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA
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Kim BJ, Kim S, Oh DX, Masic A, Cha HJ, Hwang DS. Mussel-inspired adhesive protein-based electrospun nanofibers reinforced by Fe(iii)–DOPA complexation. J Mater Chem B 2015; 3:112-118. [DOI: 10.1039/c4tb01496k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The mechanical properties of mussel-inspired electrospun nanofibers were reinforced by the Fe(III)–DOPA complex in the mussel adhesive protein, a key component for a naturally occurring high performance mussel protective coating.
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Affiliation(s)
- Bum Jin Kim
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang 790-784
- Korea
- Department of Chemical Engineering
| | - Sangsik Kim
- Ocean Science and Technology Institute
- Pohang University of Science and Technology
- Pohang 790-784
- Korea
- School of Environmental Science and Engineering
| | - Dongyeop X. Oh
- Ocean Science and Technology Institute
- Pohang University of Science and Technology
- Pohang 790-784
- Korea
| | - Admir Masic
- Department of Biomaterials
- Max Planck Institute for Colloids and Interfaces
- Potsdam 14424
- Germany
| | - Hyung Joon Cha
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang 790-784
- Korea
- Department of Chemical Engineering
| | - Dong Soo Hwang
- School of Interdisciplinary Bioscience and Bioengineering
- Pohang University of Science and Technology
- Pohang 790-784
- Korea
- Ocean Science and Technology Institute
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Fuchsluger T, Salehi S, Petsch C, Bachmann B. Neue Möglichkeiten der Augenoberflächenrekonstruktion. Ophthalmologe 2014; 111:1019-26. [DOI: 10.1007/s00347-013-3010-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Jiang H, Wang L, Zhu K. Coaxial electrospinning for encapsulation and controlled release of fragile water-soluble bioactive agents. J Control Release 2014; 193:296-303. [DOI: 10.1016/j.jconrel.2014.04.025] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/02/2014] [Accepted: 04/10/2014] [Indexed: 01/11/2023]
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37
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Yang C, Deng G, Chen W, Ye X, Mo X. A novel electrospun-aligned nanoyarn-reinforced nanofibrous scaffold for tendon tissue engineering. Colloids Surf B Biointerfaces 2014; 122:270-276. [PMID: 25064476 DOI: 10.1016/j.colsurfb.2014.06.061] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 06/23/2014] [Accepted: 06/25/2014] [Indexed: 01/05/2023]
Abstract
An electrospun-aligned nanoyarn-reinforced nanofibrous scaffold (NRS) was developed for tendon tissue engineering to improve mechanical strength and cell infiltration. The novel scaffold composed of aligned nanoyarns and random nanofibers was fabricated via electrospinning using a two-collector system. The aim of the present study was to investigate three different types of electrospun scaffolds (random nanofibrous scaffold, aligned nanofibrous scaffold and NRS) based on silk fibroin (SF) and poly(l-lactide-co-caprolactone) blends. Morphological analysis demonstrated that the NRS composed of aligned nanoyarns and randomly distributed nanofibers formed a 3D microstructure with relatively large pore sizes and high porosity. Biocompatibility analysis revealed that bone marrow-derived mesenchymal stem cells exhibited a higher proliferation rate when cultured on the NRS compared with the other scaffolds. The mechanical testing results indicated that the tensile properties of the NRS were reinforced in the direction parallel to the nanoyarns and satisfied the mechanical requirements for tendon repair. In addition, cell infiltration was significantly enhanced on the NRS. In conclusion, with its improved porosity and appropriate mechanical properties, the developed NRS shows promise for tendon tissue engineering applications.
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Affiliation(s)
- Chengwei Yang
- Department of Orthopaedics, Changzheng Hospital affiliated with Second Military Medical University, 415 Fengyang Road, Shanghai 200003, PR China; Department of Spinal Surgery, Lanzhou General Hospital of Lanzhou Military Command Region, 333 Nanbinhe Road, Lanzhou 730050, PR China
| | - Guoying Deng
- Department of Orthopaedics, Changzheng Hospital affiliated with Second Military Medical University, 415 Fengyang Road, Shanghai 200003, PR China
| | - Weiming Chen
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 Renmin Road North, Songjiang District, Shanghai 201620, PR China
| | - Xiaojian Ye
- Department of Orthopaedics, Changzheng Hospital affiliated with Second Military Medical University, 415 Fengyang Road, Shanghai 200003, PR China.
| | - Xiumei Mo
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 Renmin Road North, Songjiang District, Shanghai 201620, PR China.
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38
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Jana S, Leung M, Chang J, Zhang M. Effect of nano- and micro-scale topological features on alignment of muscle cells and commitment of myogenic differentiation. Biofabrication 2014; 6:035012. [DOI: 10.1088/1758-5082/6/3/035012] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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39
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Salehi S, Bahners T, Gutmann JS, Gao SL, Mäder E, Fuchsluger TA. Characterization of structural, mechanical and nano-mechanical properties of electrospun PGS/PCL fibers. RSC Adv 2014. [DOI: 10.1039/c4ra01237b] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Structural and mechanical properties of aligned PGS/PCL nanofibers for cornea tissue engineering are studied and compared to natural corneal stroma.
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Affiliation(s)
- S. Salehi
- Deutsches Textilforschungszentrum Nord-West gGmbH
- 47798 Krefeld, Germany
- Augenklinik
- Universitätsklinikum Düsseldorf
- Heinrich-Heine-Universität
| | - T. Bahners
- Deutsches Textilforschungszentrum Nord-West gGmbH
- 47798 Krefeld, Germany
| | - J. S. Gutmann
- Deutsches Textilforschungszentrum Nord-West gGmbH
- 47798 Krefeld, Germany
- Physikalische Chemie
- Universität Duisburg-Essen
- 45141 Essen, Germany
| | - S.-L. Gao
- Leibniz Institut für Polymerforschung e.V
- D-01069 Dresden, Germany
| | - E. Mäder
- Leibniz Institut für Polymerforschung e.V
- D-01069 Dresden, Germany
| | - T. A. Fuchsluger
- Augenklinik
- Universitätsklinikum Düsseldorf
- Heinrich-Heine-Universität
- 40225 Düsseldorf, Germany
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40
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Li H, Xu Y, Xu H, Chang J. Electrospun membranes: control of the structure and structure related applications in tissue regeneration and drug delivery. J Mater Chem B 2014; 2:5492-5510. [DOI: 10.1039/c4tb00913d] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Multilevel structures of electrospun membranes can be controlled and the designed structures can strongly affect cell behavior and drug delivery.
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Affiliation(s)
- Haiyan Li
- Med-X Research Institute
- School of Biomedical Engineering
- Shanghai Jiao Tong University
- Shanghai, China
| | - Yachen Xu
- Med-X Research Institute
- School of Biomedical Engineering
- Shanghai Jiao Tong University
- Shanghai, China
| | - He Xu
- Med-X Research Institute
- School of Biomedical Engineering
- Shanghai Jiao Tong University
- Shanghai, China
| | - Jiang Chang
- Med-X Research Institute
- School of Biomedical Engineering
- Shanghai Jiao Tong University
- Shanghai, China
- Shanghai Institute of Ceramics
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41
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Rujitanaroj PO, Aid-Launais R, Chew SY, Le Visage C. Polysaccharide electrospun fibers with sulfated poly(fucose) promote endothelial cell migration and VEGF-mediated angiogenesis. Biomater Sci 2014; 2:843-852. [DOI: 10.1039/c3bm60245a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This study demonstrates the potential of fucoidan-incorporated pullulan–dextran fibers as tunable reservoirs for VEGF delivery to promote angiogenesis.
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Affiliation(s)
- Pim-On Rujitanaroj
- Nanyang Technological University
- School of Chemical & Biomedical Engineering
- Singapore 637459, Singapore
| | | | - Sing Yian Chew
- Nanyang Technological University
- School of Chemical & Biomedical Engineering
- Singapore 637459, Singapore
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42
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Surface-Coated Polylactide Fiber Meshes as Tissue Engineering Matrices with Enhanced Cell Integration Properties. INT J POLYM SCI 2014. [DOI: 10.1155/2014/439784] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Poly(L-lactide-co-D/L-lactide)-based fiber meshes resembling structural features of the native extracellular matrix have been prepared by electrospinning. Subsequent coating of the electrospun fibers with an ultrathin plasma-polymerized allylamine (PPAAm) layer after appropriate preactivation with continuous O2/Ar plasma changed the hydrophobic nature of the polylactide surface into a hydrophilic polymer network and provided positively charged amino groups on the fiber surface able to interact with negatively charged pericellular matrix components. In vitro cell experiments using different human cell types (epithelial origin: gingiva and uroepithelium; bone cells: osteoblasts) revealed that the PPAAm-activated surfaces promoted the occupancy of the meshes by cells accompanied by improved initial cell spreading. This nanolayer is stable in its cell adhesive characteristics also afterγ-sterilization. An in vivo study in a rat intramuscular implantation model demonstrated that the local inflammatory tissue response did not differ between PPAAm-coated and untreated polylactide meshes.
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Sohier J, Corre P, Perret C, Pilet P, Weiss P. Novel and simple alternative to create nanofibrillar matrices of interest for tissue engineering. Tissue Eng Part C Methods 2013; 20:285-96. [PMID: 23937338 DOI: 10.1089/ten.tec.2013.0147] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Synthetic analogs to natural extracellular matrix (ECM) at the nanometer level are of great potential for regenerative medicine. This study introduces a novel and simple method to produce polymer nanofibers and evaluates the properties of the resulting structures, as well as their suitability to support cells and their potential interest for bone and vascular applications. The devised approach diffracts a polymer solution by means of a spraying apparatus and of an airstream as sole driving force. The resulting nanofibers were produced in an effective fashion and a factorial design allowed isolating the processing parameters that control nanofiber size and distribution. The nanofibrillar matrices revealed to be of very high porosity and were effectively colonized by human bone marrow mesenchymal cells, while allowing ECM production and osteoblastic differentiation. In vivo, the matrices provided support for new bone formation and provided a good patency as small diameter vessel grafts.
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Affiliation(s)
- Jérôme Sohier
- 1 INSERM U 791, Laboratory for Osteo-Articular and Dental Tissue Engineering (LIOAD), University of Nantes , Nantes, France
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44
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Kim IL, Khetan S, Baker BM, Chen CS, Burdick JA. Fibrous hyaluronic acid hydrogels that direct MSC chondrogenesis through mechanical and adhesive cues. Biomaterials 2013; 34:5571-80. [PMID: 23623322 PMCID: PMC3652578 DOI: 10.1016/j.biomaterials.2013.04.004] [Citation(s) in RCA: 170] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 04/03/2013] [Indexed: 12/15/2022]
Abstract
Electrospinning has recently gained much interest due to its ability to form scaffolds that mimic the nanofibrous nature of the extracellular matrix, such as the size and depth-dependent alignment of collagen fibers within hyaline cartilage. While much progress has been made in developing bulk, isotropic hydrogels for tissue engineering and understanding how the microenvironment of such scaffolds affects cell response, these effects have not been extensively studied in a nanofibrous system. Here, we show that the mechanics (through intrafiber crosslink density) and adhesivity (through RGD density) of electrospun hyaluronic acid (HA) fibers significantly affect human mesenchymal stem cell (hMSC) interactions and gene expression. Specifically, hMSC spreading, proliferation, and focal adhesion formation were dependent on RGD density, but not on the range of fiber mechanics investigated. Moreover, traction-mediated fiber displacements generally increased with more adhesive fibers. The expression of chondrogenic markers, unlike trends in cell spreading and cytoskeletal organization, was influenced by both fiber mechanics and adhesivity, in which softer fibers and lower RGD densities generally enhanced chondrogenesis. This work not only reveals concurrent effects of mechanics and adhesivity in a fibrous context, but also highlights fibrous HA hydrogels as a promising scaffold for future cartilage repair strategies.
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Affiliation(s)
- Iris L. Kim
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA [Tel: 215-898-8537; Fax: 215-573-2071]
| | - Sudhir Khetan
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA [Tel: 215-898-8537; Fax: 215-573-2071]
| | - Brendon M. Baker
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA [Tel: 215-898-8537; Fax: 215-573-2071]
| | - Christopher S. Chen
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA [Tel: 215-898-8537; Fax: 215-573-2071]
| | - Jason A. Burdick
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA [Tel: 215-898-8537; Fax: 215-573-2071]
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45
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Song W, Yu X, Markel DC, Shi T, Ren W. Coaxial PCL/PVA electrospun nanofibers: osseointegration enhancer and controlled drug release device. Biofabrication 2013; 5:035006. [PMID: 23799653 DOI: 10.1088/1758-5082/5/3/035006] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The failure of prosthesis after total joint replacement is mainly due to dysfunctional osseointegration and implant infection. There is a critical need for orthopedic implants that promote rapid osseointegration and prevent bacterial colonization, particularly when placed in bone compromised by disease or physiology of the patients. The aim of this study was to fabricate a novel coaxial electrospun polycaprolactone (PCL)/polyvinyl alcohol (PVA) core-sheath nanofiber (NF) blended with both hydroxyapatite nanorods (HA) and type I collagen (Col) (PCL(Col)/PVA(HA)). Doxycycline (Doxy) and dexamethasone (Dex) were successfully incorporated into the PCL(Col)/PVA(HA) NFs for controlled release. The morphology, surface hydrophilicity and mechanical properties of the PCL/PVA NF mats were analyzed by scanning electron microscopy, water contact angle and atomic force microscopy. The PCL(Col)/PVA(HA) NFs are biocompatible and enhance the adhesion and proliferation of murine pre-osteoblastic MC3T3 cells. The release of Doxy and Dex from coaxial PCL(Col)/PVA(HA) NFs showed more controlled release compared with the blended NFs. Using an ex vivo porcine bone implantation model we found that the PCL(Col)/PVA(HA) NFs bind firmly on the titanium rod surface and the NFs coating remained intact on the surface of titanium rods after pullout. No disruption or delamination was observed after the pullout test. These findings indicate that PCL(Col)/PVA(HA) NFs encapsulating drugs have great potential in enhancing implant osseointegration and preventing implant infection.
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Affiliation(s)
- Wei Song
- Department of Biomedical Engineering, Wayne State University, Detroit, MI, USA
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46
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Sundararaghavan HG, Saunders RL, Hammer DA, Burdick JA. Fiber alignment directs cell motility over chemotactic gradients. Biotechnol Bioeng 2012; 110:1249-54. [DOI: 10.1002/bit.24788] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 11/05/2012] [Accepted: 11/06/2012] [Indexed: 01/01/2023]
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47
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Ionescu LC, Mauck RL. Porosity and cell preseeding influence electrospun scaffold maturation and meniscus integration in vitro. Tissue Eng Part A 2012; 19:538-47. [PMID: 22994398 DOI: 10.1089/ten.tea.2012.0052] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Electrospinning generates fibrous scaffolds ideal for engineering soft orthopedic tissues. By modifying the electrospinning process, scaffolds with different structural organization and content can be generated. For example, fibers can be aligned in a single direction, or the porosity of the scaffold can be modified through the use of multi-jet electrospinning and the removal of sacrificial fibers. In this work, we investigated the role of fiber alignment and scaffold porosity on construct maturation and integration within in vitro meniscus defects. Further, we explored the effect of preseeding expanded meniscus fibrochondrocytes (MFCs) onto the scaffold at a high density before in vitro repair. Our results demonstrate that highly porous electropun scaffolds integrate better with a native tissue and mature to a greater extent than low-porosity scaffolds, while scaffold alignment does not influence integration or maturation. The addition of expanded MFCs to scaffolds before in vitro repair improved integration with the native tissue, but did not influence maturation. In contrast, preculture of these same scaffolds for 1 month before repair decreased integration with the native tissue, but resulted in a more mature scaffold compared to implantation of cellular scaffolds or acellular scaffolds. This work will inform scaffold selection in future in vivo studies by identifying the ideal scaffold and seeding methods for meniscus tissue engineering.
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Affiliation(s)
- Lara C Ionescu
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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48
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Kai D, Jin G, Prabhakaran MP, Ramakrishna S. Electrospun synthetic and natural nanofibers for regenerative medicine and stem cells. Biotechnol J 2012; 8:59-72. [DOI: 10.1002/biot.201200249] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 09/05/2012] [Accepted: 10/08/2012] [Indexed: 11/07/2022]
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49
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Ionescu LC, Lee GC, Huang KL, Mauck RL. Growth factor supplementation improves native and engineered meniscus repair in vitro. Acta Biomater 2012; 8:3687-94. [PMID: 22698946 DOI: 10.1016/j.actbio.2012.06.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 05/30/2012] [Accepted: 06/06/2012] [Indexed: 02/07/2023]
Abstract
Few therapeutic options exist for meniscus repair after injury. Local delivery of growth factors may stimulate repair and create a favorable environment for engineered replacement materials. In this study we assessed the effect of basic fibroblast growth factor (bFGF) (a pro-mitotic agent) and transforming growth factor β3 (TGF-β3) (a pro-matrix formation agent) on meniscus repair and the integration/maturation of electrospun poly(ε-caprolactone) (PCL) scaffolds for meniscus tissue engineering. Circular meniscus repair constructs were formed and refilled with either native tissue or scaffolds. Repair constructs were cultured in serum-containing medium for 4 and 8weeks with various growth factor formulations, and assessed for mechanical strength, biochemical content, and histological appearance. Results showed that either short-term delivery of bFGF or sustained delivery of TGF-β3 increased integration strength for both juvenile and adult bovine tissue, with similar findings for engineered materials. While TGF-β3 increased proteoglycan content in the explants, bFGF did not increase DNA content after 8weeks of culture. This work suggests that in vivo delivery of bFGF or TGF-β3 may stimulate meniscus repair, but that the time course of delivery will strongly influence success. Further, this study demonstrates that electrospun scaffolds are a promising material for meniscus tissue engineering, achieving comparable or superior integration compared with native tissue.
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50
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Sell SA, Ericksen JJ, Bowlin GL. The incorporation and controlled release of platelet-rich plasma-derived biomolecules from polymeric tissue engineering scaffolds. POLYM INT 2012. [DOI: 10.1002/pi.4372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Scott A Sell
- Physical Medicine and Rehabilitation Service; Hunter Holmes McGuire VA Medical Center; Richmond VA 23249 USA
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
| | - Jeffery J Ericksen
- Physical Medicine and Rehabilitation Service; Hunter Holmes McGuire VA Medical Center; Richmond VA 23249 USA
- Department of Physical Medicine and Rehabilitation; Virginia Commonwealth University; Richmond VA 23284 USA
| | - Gary L Bowlin
- Department of Biomedical Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
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