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Majumder N, Bhattacharjee M, Spagnoli GC, Ghosh S. Immune response profiles induced by silk-based biomaterials: a journey from 'immunogenicity' towards 'immuno-compatibility. J Mater Chem B 2024. [PMID: 39225012 DOI: 10.1039/d4tb01231c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Silk is a widely accepted biomaterial for tissue regeneration owing to its tunable biomechanical properties and ease of chemical modification. However, a number of aspects associated with its clinical use are still debated. Indeed, to achieve clinical success, a biomaterial must favorably interact with host tissues without evoking local or systemic immuno-inflammatory responses. The analysis of immune responses associated with silk under in vitro and in vivo conditions provides useful insights, improving the understanding of the functional characteristics of silk biomaterials and further promoting their clinical application. Silk evokes moderate immune responses upon implantation in vivo, depending on the material structure, fabrication method, degradation time, and implantation in soft or hard tissue sites, which rapidly subside within a few days/weeks. In vitro studies indicate that its immune-stimulatory properties are largely due to inherent protein conformation and differential processing parameters. Strategically controlled levels of immune responses in vivo with marginal immunogenicity of silk-based biomaterials may contribute to matrix remodeling and replacement by native tissue matrix around the implanted site. Therefore, immunomodulatory strategies should be developed to promote the use of silk-based biomaterials as promising candidates for numerous clinical applications.
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Affiliation(s)
- Nilotpal Majumder
- Regenerative Engineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India.
| | - Maumita Bhattacharjee
- Regenerative Engineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India.
| | - Giulio C Spagnoli
- National Research Council Institute of Translational Pharmacology, Rome, Italy
| | - Sourabh Ghosh
- Regenerative Engineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India.
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2
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Roosa CA, Lempke SL, Hannan RT, Nicklow E, Sturek JM, Ewald SE, Griffin DR. Conjugation of IL-33 to Microporous Annealed Particle Scaffolds Enhances Type 2-Like Immune Responses In Vitro and In Vivo. Adv Healthc Mater 2024:e2400249. [PMID: 38648258 DOI: 10.1002/adhm.202400249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/11/2024] [Indexed: 04/25/2024]
Abstract
The inflammatory foreign body response (FBR) is the main driver of biomaterial implant failure. Current strategies to mitigate the onset of a FBR include modification of the implant surface, release of anti-inflammatory drugs, and cell-scale implant porosity. The microporous annealed particle (MAP) scaffold platform is an injectable, porous biomaterial composed of individual microgels, which are annealed in situ to provide a structurally stable scaffold with cell-scale microporosity. MAP scaffold does not induce a discernible foreign body response in vivo and, therefore, can be used a "blank canvas" for biomaterial-mediated immunomodulation. Damage associated molecular patterns (DAMPs), such as IL-33, are potent regulators of type 2 immunity that play an important role in tissue repair. In this manuscript, IL-33 is conjugated to the microgel building-blocks of MAP scaffold to generate a bioactive material (IL33-MAP) capable of stimulating macrophages in vitro via a ST-2 receptor dependent pathway and modulating immune cell recruitment to the implant site in vivo, which indicates an upregulation of a type 2-like immune response and downregulation of a type 1-like immune response.
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Affiliation(s)
- Colleen A Roosa
- Department of Biomedical Engineering, University of Virginia, 415 Lane Rd, Charlottesville, VA, 22903, USA
| | - Samantha L Lempke
- Department of Microbiology, Immunology, and Cancer Biology, Beirne B. Carter Immunology Center, University of Virginia, 200 Jeanette Lancaster Way, Charlottesville, VA, 22903, USA
| | - Riley T Hannan
- Department of Medicine, Pulmonary and Critical Care, University of Virginia, 1221 Lee St, Charlottesville, VA, 22903, USA
| | - Ethan Nicklow
- Department of Biomedical Engineering, University of Virginia, 415 Lane Rd, Charlottesville, VA, 22903, USA
| | - Jeffrey M Sturek
- Department of Medicine, Pulmonary and Critical Care, University of Virginia, 1221 Lee St, Charlottesville, VA, 22903, USA
| | - Sarah E Ewald
- Department of Microbiology, Immunology, and Cancer Biology, Beirne B. Carter Immunology Center, University of Virginia, 200 Jeanette Lancaster Way, Charlottesville, VA, 22903, USA
| | - Donald R Griffin
- Department of Biomedical Engineering, University of Virginia, 415 Lane Rd, Charlottesville, VA, 22903, USA
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Bose S, Sarkar N, Jo Y. Natural medicine delivery from 3D printed bone substitutes. J Control Release 2024; 365:848-875. [PMID: 37734674 PMCID: PMC11147672 DOI: 10.1016/j.jconrel.2023.09.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 09/11/2023] [Accepted: 09/14/2023] [Indexed: 09/23/2023]
Abstract
Unmet medical needs in treating critical-size bone defects have led to the development of numerous innovative bone tissue engineering implants. Although additive manufacturing allows flexible patient-specific treatments by modifying topological properties with various materials, the development of ideal bone implants that aid new tissue regeneration and reduce post-implantation bone disorders has been limited. Natural biomolecules are gaining the attention of the health industry due to their excellent safety profiles, providing equivalent or superior performances when compared to more expensive growth factors and synthetic drugs. Supplementing additive manufacturing with natural biomolecules enables the design of novel multifunctional bone implants that provide controlled biochemical delivery for bone tissue engineering applications. Controlled release of naturally derived biomolecules from a three-dimensional (3D) printed implant may improve implant-host tissue integration, new bone formation, bone healing, and blood vessel growth. The present review introduces us to the current progress and limitations of 3D printed bone implants with drug delivery capabilities, followed by an in-depth discussion on cutting-edge technologies for incorporating natural medicinal compounds embedded within the 3D printed scaffolds or on implant surfaces, highlighting their applications in several pre- and post-implantation bone-related disorders.
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Affiliation(s)
- Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States.
| | - Naboneeta Sarkar
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States
| | - Yongdeok Jo
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, United States
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4
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Li X, Wu X. The microspheres/hydrogels scaffolds based on the proteins, nucleic acids, or polysaccharides composite as carriers for tissue repair: A review. Int J Biol Macromol 2023; 253:126611. [PMID: 37652329 DOI: 10.1016/j.ijbiomac.2023.126611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/31/2023] [Accepted: 08/28/2023] [Indexed: 09/02/2023]
Abstract
There are many studies on specific macromolecules and their contributions to tissue repair. Macromolecules have supporting and protective effects in organisms and can help regrow, reshape, and promote self-repair and regeneration of damaged tissues. Macromolecules, such as proteins, nucleic acids, and polysaccharides, can be constructed into hydrogels for the preparation of slow-release drug agents, carriers for cell culture, and platforms for gene delivery. Hydrogels and microspheres are fabricated by chemical crosslinking or mixed co-deposition often used as scaffolds, drug carriers, or cell culture matrix, provide proper mechanical support and nutrient delivery, a well-conditioned environment that to promote the regeneration and repair of damaged tissues. This review provides a comprehensive overview of recent developments in the construction of macromolecules into hydrogels and microspheres based on the proteins, nucleic acids, polysaccharides and other polymer and their application in tissue repair. We then discuss the latest research trends regarding the advantages and disadvantages of these composites in repair tissue. Further, we examine the applications of microspheres/hydrogels in different tissue repairs, such as skin tissue, cartilage, tumor tissue, synovial, nerve tissue, and cardiac repair. The review closes by highlighting the challenges and prospects of microspheres/hydrogels composites.
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Affiliation(s)
- Xian Li
- Key Laboratory of Medical Cell Biology in Inner Mongolia, Clinical Medical Research Center, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010050, China
| | - Xinlin Wu
- Department of Gastrointestinal Surgery, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, Inner Mongolia Autonomous Region, China.
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Derafsh E, Ebrahimzadeh F, Kahrizi MS, Kayedi M, Shojaei N, Rahimi S, Alesaeidi S, Ghafouri K. The therapeutic effects of mesenchymal stem cell (MSCs) exosomes in covid-19 disease; Focusing on dexamethasone therapy. Pathol Res Pract 2023; 251:154815. [PMID: 37797382 DOI: 10.1016/j.prp.2023.154815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/05/2023] [Accepted: 09/08/2023] [Indexed: 10/07/2023]
Abstract
The study of diseases, specifically their aetiologies, their step-by-step progressions (pathogenesis), and their impact on normal structure and function, is the focus of pathology, a branch of science and medicine. In therapeutic fields, it is critical to decrease significantly elevated levels of proinflammatory cytokines. The immunomodulatory drugs such as dexamethasone have been used in several of inflammatory diseases such as Covid-19. The use of dexamethasone alone or in combination with other drugs or method such as mesenchymal stem cell (MSC) is one of the most up-to-date discussions about Covid-19. In this review, we first examined the effects of dexamethasone as monotherapy on inflammatory cytokines and then examined studies that used combination therapy of dexamethasone and other drugs such as Baricitinib, Tofacitinib and tocilizumab. Also, therapeutic aspects of MSCs are examined in this review.
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Affiliation(s)
- Ehsan Derafsh
- Department of Basic Medical Science, Windsor University School of Medicine, Brighton's Estate, Cayton, Saint Kitts and Nevis
| | - Farnoosh Ebrahimzadeh
- Department of Internal Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, lran
| | | | - Mehrdad Kayedi
- Department of radiology. Shiraz university of medical sciences, Shiraz, iran
| | - Niloofar Shojaei
- School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Shiva Rahimi
- School of medicine,fasa university of medical sciences,Fasa, Iran
| | - Samira Alesaeidi
- Department of Internal medicine and rheumatology, ⁎Rheumatology Research Center⁎, Tehran University of Medical Sciences, Tehran, Iran.
| | - Kimia Ghafouri
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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Piłat J, Przekora A, Wróbel-Dudzińska D, Kazimierczak P, Żarnowski T, Kosior-Jarecka E. Analysis of the impact of different schemes of preparation to trabeculectomy on the healing markers on the Tenon fibroblasts cultures. Sci Rep 2023; 13:16353. [PMID: 37770514 PMCID: PMC10539375 DOI: 10.1038/s41598-023-43246-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 09/21/2023] [Indexed: 09/30/2023] Open
Abstract
The aim of the study was to assess the influence of different regimes of patient's preparation before trabeculectomy on the markers of healing process in Tenon's fibroblast cultures.The studied group consisted of 66 patients with open angle glaucoma undergoing primary trabeculectomy. The patients were divided into 5 groups with different regimes of preparation before the surgery based on application or withdrawal of topical antiglaucoma medications and steroids (G1-patients using antiglaucoma drops until the day of the surgery; G2-patients using antiglaucoma drops until the day of the surgery and additionally dexamethasone for 4 weeks before surgery; G3-patients who stopped using antiglaucoma drops 4 weeks before the surgery and introduced dexamethasone for 4 weeks before surgery; G4-patients who stopped using antiglaucoma drops 4 weeks before the surgery; G5-control group, patients with newly diagnosed glaucoma in whom trabeculectomy was the first treatment option without medical treatment). During trabeculectomy the samples of Tenon's capsule were obtained. Tenon fibroblasts were isolated directly from the explants to test their proliferation ability and the level of released healing markers. Following factors typical of healing process were evaluated using commercially available ELISA kits: IL 1-β, IL-6, IL-8, VEGF-A, TGF-β1 and MMP-9. Concentrations of IL-1β, IL-6 and TGF-β1 were significantly higher in the group obtaining antiglaucoma drops. Additionally, in this group the fibroblasts revealed the highest proliferation potential, indicating the active healing process. The levels of IL-8, VEGF-A and MMP-9 were similar between the groups. Our study shows that for the best conjunctival anti-inflammatory control, the most influential factor is the withdrawal of antiglaucoma medications.
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Affiliation(s)
- Joanna Piłat
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University of Lublin, Ul. Chmielna 1, 20-079, Lublin, Poland
| | - Agata Przekora
- Independent Unit of Tissue Engineering and Regenerative Medicine, Medical University of Lublin, Lublin, Poland
| | - Dominika Wróbel-Dudzińska
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University of Lublin, Ul. Chmielna 1, 20-079, Lublin, Poland
| | - Paulina Kazimierczak
- Independent Unit of Tissue Engineering and Regenerative Medicine, Medical University of Lublin, Lublin, Poland
| | - Tomasz Żarnowski
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University of Lublin, Ul. Chmielna 1, 20-079, Lublin, Poland
| | - Ewa Kosior-Jarecka
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University of Lublin, Ul. Chmielna 1, 20-079, Lublin, Poland.
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7
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Yuen JS, Barrick BM, DiCindio H, Pietropinto JA, Kaplan DL. Optimization of Culture Media and Cell Ratios for 3D In Vitro Skeletal Muscle Tissues with Endothelial Cells. ACS Biomater Sci Eng 2023; 9:4558-4566. [PMID: 37326372 DOI: 10.1021/acsbiomaterials.3c00358] [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] [Indexed: 06/17/2023]
Abstract
A major challenge of engineering larger macroscale tissues in vitro is the limited diffusion of nutrients and oxygen to the interior. For skeletal muscle, this limitation results in millimeter scale outcomes to avoid necrosis. One method to address this constraint may be to vascularize in vitro-grown muscle tissue, to support nutrient (culture media) flow into the interior of the structure. In this exploratory study, we examine culture conditions that enable myogenic development and endothelial cell survival within tissue engineered 3D muscles. Myoblasts (C2C12s), endothelial cells (HUVECs), and endothelial support cells (C3H 10T1/2s) were seeded into Matrigel-fibrin hydrogels and cast into 3D printed frames to form 3D in vitro skeletal muscle tissues. Our preliminary results suggest that the simultaneous optimization of culture media formulation and cell concentrations is necessary for 3D cultured muscles to exhibit robust myosin heavy chain expression and GFP expression from GFP-transfected endothelial cells. The ability to form differentiated 3D muscles containing endothelial cells is a key step toward achieving vascularized 3D muscle tissues, which have potential use as tissue for implantation in a medical setting, as well as for future foods such as cultivated meats.
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Affiliation(s)
- John Sk Yuen
- David Kaplan Laboratory, Biomedical Engineering Department, Tufts University, 4 Colby Street, Medford, Massachusetts 02215, United States
| | - Brigid M Barrick
- David Kaplan Laboratory, Biomedical Engineering Department, Tufts University, 4 Colby Street, Medford, Massachusetts 02215, United States
| | - Hailey DiCindio
- David Kaplan Laboratory, Biomedical Engineering Department, Tufts University, 4 Colby Street, Medford, Massachusetts 02215, United States
| | - Jaymie A Pietropinto
- David Kaplan Laboratory, Biomedical Engineering Department, Tufts University, 4 Colby Street, Medford, Massachusetts 02215, United States
| | - David L Kaplan
- David Kaplan Laboratory, Biomedical Engineering Department, Tufts University, 4 Colby Street, Medford, Massachusetts 02215, United States
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Imaichi-Kobayashi S, Kassab R, Piersigilli A, Robertson R, Leonard C, Long N, Dean B, Phaneuf M, Ling V. An electrospun macrodevice for durable encapsulation of human cells with consistent secretion of therapeutic antibodies. Biomaterials 2023; 298:122123. [PMID: 37172505 DOI: 10.1016/j.biomaterials.2023.122123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 03/31/2023] [Accepted: 04/08/2023] [Indexed: 05/15/2023]
Abstract
Frequent subcutaneous or intravenous administrations of therapeutic biomolecules can be costly and inconvenient for patients. Implantation of encapsulated recombinant cells represents a promising approach for the sustained delivery of biotherapeutics. However, foreign body and fibrotic response against encapsulation materials results in drastically reduced viability of encapsulated cells, presenting a major engineering challenge for biocompatibility. Here, we show that the multi-laminate electrospun retrievable macrodevice (Bio-Spun) protects genetically modified human cells after subcutaneous implant in mice. We describe here a biocompatible nanofiber device that limits fibrosis and extends implant survival. For more than 150 days, these devices supported human cells engineered to secrete the antibodies: vedolizumab, ustekinumab, and adalimumab, while eliciting minimal fibrotic response in mice. The porous electrospun cell chamber allowed secretion of the recombinant antibodies into the host bloodstream, and prevented infiltration of host cells into the chamber. High plasma levels (>50 μg/mL) of antibody were maintained in the optimized devices for more than 5 months. Our findings demonstrate that macrodevices constructed from electrospun materials are effective in protecting genetically engineered cells for the sustained administration of recombinant therapeutic antibodies.
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Affiliation(s)
| | | | - Alessandra Piersigilli
- Department of Drug Safety Research and Evaluation, Takeda Pharmaceuticals, Cambridge, MA, USA
| | | | - Christopher Leonard
- Department of Drug Safety Research and Evaluation, Takeda Pharmaceuticals, Cambridge, MA, USA
| | | | | | | | - Vincent Ling
- Department of Pharmaceutical Science, Takeda Pharmaceuticals, Cambridge, MA, USA.
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9
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Dal-Fabbro R, Swanson WB, Capalbo LC, Sasaki H, Bottino MC. Next-generation biomaterials for dental pulp tissue immunomodulation. Dent Mater 2023; 39:333-349. [PMID: 36894414 PMCID: PMC11034777 DOI: 10.1016/j.dental.2023.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/24/2023] [Accepted: 03/03/2023] [Indexed: 03/09/2023]
Abstract
OBJECTIVES The current standard for treating irreversibly damaged dental pulp is root canal therapy, which involves complete removal and debridement of the pulp space and filling with an inert biomaterial. A regenerative approach to treating diseased dental pulp may allow for complete healing of the native tooth structure and enhance the long-term outcome of once-necrotic teeth. The aim of this paper is, therefore, to highlight the current state of dental pulp tissue engineering and immunomodulatory biomaterials properties, identifying exciting opportunities for their synergy in developing next-generation biomaterials-driven technologies. METHODS An overview of the inflammatory process focusing on immune responses of the dental pulp, followed by periapical and periodontal tissue inflammation are elaborated. Then, the most recent advances in treating infection-induced inflammatory oral diseases, focusing on biocompatible materials with immunomodulatory properties are discussed. Of note, we highlight some of the most used modifications in biomaterials' surface, or content/drug incorporation focused on immunomodulation based on an extensive literature search over the last decade. RESULTS We provide the readers with a critical summary of recent advances in immunomodulation related to pulpal, periapical, and periodontal diseases while bringing light to tissue engineering strategies focusing on healing and regenerating multiple tissue types. SIGNIFICANCE Significant advances have been made in developing biomaterials that take advantage of the host's immune system to guide a specific regenerative outcome. Biomaterials that efficiently and predictably modulate cells in the dental pulp complex hold significant clinical promise for improving standards of care compared to endodontic root canal therapy.
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Affiliation(s)
- Renan Dal-Fabbro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | - W Benton Swanson
- Department of Biologic and Materials Science, Division of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | - Leticia C Capalbo
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Hajime Sasaki
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA; Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA.
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10
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Garhyan P, Pratt E, Klein O, Famulla S, Zijlstra E, Lalonde A, Swinney M, Kazda C, Dassau E. Evaluation of Insulin Lispro Pharmacokinetics and Pharmacodynamics Over 10 Days of Continuous Insulin Infusion in People With Type 1 Diabetes. J Diabetes Sci Technol 2023; 17:274-282. [PMID: 36575993 PMCID: PMC10012385 DOI: 10.1177/19322968221145200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND We evaluated the effect of meloxicam on insulin lispro pharmacokinetics and glucose pharmacodynamics over 10 days of continuous subcutaneous insulin infusion (CSII) at one infusion site in people with type 1 diabetes (T1D). METHOD This phase 1, randomized, double-blind, single-center, two-way crossover study enrolled adults with T1D for ≥1 year on stable CSII for ≥3 months. Participants randomly received U100 insulin lispro and LY900027 (U100 insulin lispro + 0.25 mg/mL meloxicam). Primary end points were area under the insulin lispro curve from 0 to 5 hours (AUCIns.0-5h) after bolus administration prior to a mixed-meal tolerance test (MMTT) and maximum observed concentration of insulin lispro (CIns.max) on days 5, 7, and 10, versus day 3 (baseline). RESULTS A total of 20 participants were randomized. Insulin absorption was accelerated for insulin lispro and LY900027 from days 1 to 7. The AUCIns.0-5h was significantly lower on day 10 versus day 3 for LY900027 (-19%) and insulin lispro (-14%); the AUCIns.0-5h did not differ significantly between treatments. The CIns.max increased with LY900027 and insulin lispro (by ~14%-23% and ~16%-51%) on days 5, 7, and 10 versus day 3. The CIns.max of LY900027 was ~14%-23% lower than insulin lispro CIns.max on days 7 and 10 (P ≤ .0805). Accelerated insulin absorption and a modest loss of total insulin exposure led to a loss of MMTT glycemic control at later time points. CONCLUSIONS The pharmacokinetics of insulin changed over catheter wear time even when an anti-inflammatory agent was present. Postprandial glycemic control was adversely affected by the accelerated insulin absorption and decreased insulin exposure.
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Affiliation(s)
| | - Edward Pratt
- Lilly Centre for Clinical Pharmacology,
Singapore, Singapore
| | | | | | | | - Amy Lalonde
- Eli Lilly and Company, Indianapolis,
IN, USA
| | | | | | - Eyal Dassau
- Eli Lilly and Company, Indianapolis,
IN, USA
- Eli Lilly and Company, Cambridge, MA,
USA
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11
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Salthouse D, Novakovic K, Hilkens CMU, Ferreira AM. Interplay between biomaterials and the immune system: Challenges and opportunities in regenerative medicine. Acta Biomater 2023; 155:1-18. [PMID: 36356914 DOI: 10.1016/j.actbio.2022.11.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/17/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022]
Abstract
The use of biomaterials for tissue engineering and regenerative medicine applications has increased dramatically over recent years. However, the clinical uptake of a wide variety of biomaterials remains limited due to adverse effects commonly exhibited by patients, which are caused by the host immune response. Despite this, current in vitro evaluation standards (ISO-10993) for assessing the host response to biomaterials have limitations in predicting the likelihood of in vivo biomaterial acceptance. Furthermore, endotoxin contamination of biomaterials is rarely considered, despite its ability to significantly affect the performance of biomaterials and engineered tissues. This review highlights the importance of the immune response to biomaterials and discusses existing challenges and opportunities in the development and standardised assessment of the immune response to biomaterials, including the importance of endotoxin levels. In addition, the properties of biomaterials that impact the host immune response and the exploitation of immunomodulatory biomaterials in regenerative medicine are explored. Finally, a standardised in vitro pathway of evaluating the immune response to biomaterials (hydrogels) and their regenerative potential is proposed, aiming to ensure safety and consistency, while reducing costs and the use of animals in the biomaterials research for tissue engineering and regenerative medicine. STATEMENT OF SIGNIFICANCE: This review presents a critical analysis of the role of the interactions between the immune system and biomaterials in determining the therapeutic success of biomaterial-based approaches. No such review addressing the lack of understanding of biomaterial-immune system interactions during the developmental and pre-clinical stages of biomaterials, including the impact of the endotoxin levels of biomaterials on the immune response, is published. As there is a lack of in vitro regulations to evaluate the immune response to biomaterials, a standardised in vitro pathway to evaluate the immune response to biomaterials (hydrogels) and their immunomodulatory and regenerative potential for use in tissue engineering/regenerative medicine applications is presented. The aim of the proposed pathway of biomaterial evaluation is to ensure safety and consistency in the biomaterials research community, while reducing costs and animal use (through the concept of the 3R's - reduction, refinement, and replacement of animals).
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Affiliation(s)
- Daniel Salthouse
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Katarina Novakovic
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Catharien M U Hilkens
- Translational & Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Ana Marina Ferreira
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom.
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Controlled release of low-molecular weight, polymer-free corticosteroid coatings suppresses fibrotic encapsulation of implanted medical devices. Biomaterials 2022; 286:121586. [DOI: 10.1016/j.biomaterials.2022.121586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 05/12/2022] [Accepted: 05/15/2022] [Indexed: 11/23/2022]
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13
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In Vitro Angiogenesis Inhibition and Endothelial Cell Growth and Morphology. Int J Mol Sci 2022; 23:ijms23084277. [PMID: 35457095 PMCID: PMC9025250 DOI: 10.3390/ijms23084277] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/04/2022] [Accepted: 04/08/2022] [Indexed: 02/05/2023] Open
Abstract
A co-culture assay with human umbilical vein endothelial cells (HUVECs) and normal human dermal fibroblasts (NHDFs) was used to study whether selected angiogenesis inhibitors were able to inhibit differentiation and network formation of HUVECs in vitro. The effect of the inhibitors was determined by the morphology and the calculated percentage area covered by HUVECs. Neutralizing VEGF with avastin and polyclonal goat anti-VEGF antibody and inhibiting VEGFR2 with sorafenib and vatalanib resulted in the formation of HUVEC clusters of variable sizes as a result of inhibited EC differentiation. Furthermore, numerous inhibitors of the VEGF signaling pathways were tested for their effect on the growth and differentiation of HUVECs. The effects of these inhibitors did not reveal a cluster morphology, either individually or when combined to block VEGFR2 downstream pathways. Only the addition of N-methyl-p-bromolevamisole revealed a similar morphology as when targeting VEGF and VEGFR2, meaning it may have an inhibitory influence directly on VEGFR signaling. Additionally, several nuclear receptor ligands and miscellaneous compounds that might affect EC growth and differentiation were tested, but only dexamethasone gave rise to cluster formation similarly to VEGF-neutralizing compounds. These results point to a link between angiogenesis, HUVEC differentiation and glucocorticoid receptor activation.
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Sonatkar J, Kandasubramanian B, Oluwarotimi Ismail S. 4D printing: Pragmatic progression in biofabrication. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111128] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Wang D, Tan J, Zhu H, Mei Y, Liu X. Biomedical Implants with Charge-Transfer Monitoring and Regulating Abilities. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2004393. [PMID: 34166584 PMCID: PMC8373130 DOI: 10.1002/advs.202004393] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 05/12/2021] [Indexed: 05/06/2023]
Abstract
Transmembrane charge (ion/electron) transfer is essential for maintaining cellular homeostasis and is involved in many biological processes, from protein synthesis to embryonic development in organisms. Designing implant devices that can detect or regulate cellular transmembrane charge transfer is expected to sense and modulate the behaviors of host cells and tissues. Thus, charge transfer can be regarded as a bridge connecting living systems and human-made implantable devices. This review describes the mode and mechanism of charge transfer between organisms and nonliving materials, and summarizes the strategies to endow implants with charge-transfer regulating or monitoring abilities. Furthermore, three major charge-transfer controlling systems, including wired, self-activated, and stimuli-responsive biomedical implants, as well as the design principles and pivotal materials are systematically elaborated. The clinical challenges and the prospects for future development of these implant devices are also discussed.
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Affiliation(s)
- Donghui Wang
- State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institutes of CeramicsChinese Academy of SciencesShanghai200050China
- School of Materials Science and EngineeringHebei University of TechnologyTianjin300130China
| | - Ji Tan
- State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institutes of CeramicsChinese Academy of SciencesShanghai200050China
| | - Hongqin Zhu
- State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institutes of CeramicsChinese Academy of SciencesShanghai200050China
- Department of Materials ScienceFudan UniversityShanghai200433China
| | - Yongfeng Mei
- Department of Materials ScienceFudan UniversityShanghai200433China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institutes of CeramicsChinese Academy of SciencesShanghai200050China
- School of Chemistry and Materials ScienceHangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou310024China
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16
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Bhave G, Chen JC, Singer A, Sharma A, Robinson JT. Distributed sensor and actuator networks for closed-loop bioelectronic medicine. MATERIALS TODAY (KIDLINGTON, ENGLAND) 2021; 46:125-135. [PMID: 34366697 PMCID: PMC8336425 DOI: 10.1016/j.mattod.2020.12.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Designing implantable bioelectronic systems that continuously monitor physiological functions and simultaneously provide personalized therapeutic solutions for patients remains a persistent challenge across many applications ranging from neural systems to bioelectronic organs. Closed-loop systems typically consist of three functional blocks, namely, sensors, signal processors and actuators. An effective system, that can provide the necessary therapeutics, tailored to individual physiological factors requires a distributed network of sensors and actuators. While significant progress has been made, closed-loop systems still face many challenges before they can truly be considered as long-term solutions for many diseases. In this review, we consider three important criteria where materials play a critical role to enable implantable closed-loop systems: Specificity, Biocompatibility and Connectivity. We look at the progress made in each of these fields with respect to a specific application and outline the challenges in creating bioelectronic technologies for the future.
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17
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Didyuk O, Econom N, Guardia A, Livingston K, Klueh U. Continuous Glucose Monitoring Devices: Past, Present, and Future Focus on the History and Evolution of Technological Innovation. J Diabetes Sci Technol 2021; 15:676-683. [PMID: 31931614 PMCID: PMC8120065 DOI: 10.1177/1932296819899394] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The concept of implantable glucose sensors has been promulgated for more than 40 years. It is now accepted that continuous glucose monitoring (CGM) increases quality of life by allowing informed diabetes management decisions as a result of more optimized glucose control. The focus of this article is to provide a brief overview of the CGM market history, emerging technologies, and the foreseeable challenges for the next CGM generations as well as proposing possible solutions in an effort to advance the next generation of implantable sensor.
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Affiliation(s)
- Olesya Didyuk
- Department of Biological Sciences, IBio
(Integrative Biosciences Center), Wayne State University, Detroit, MI, USA
| | - Nicolas Econom
- Biomedical Engineering, IBio
(Integrative Biosciences Center), Wayne State University, Detroit, MI, USA
| | - Angelica Guardia
- Biomedical Engineering, IBio
(Integrative Biosciences Center), Wayne State University, Detroit, MI, USA
| | - Kelsey Livingston
- Biomedical Engineering, IBio
(Integrative Biosciences Center), Wayne State University, Detroit, MI, USA
| | - Ulrike Klueh
- Biomedical Engineering, IBio
(Integrative Biosciences Center), Wayne State University, Detroit, MI, USA
- Ulrike Klueh, PhD, Department of Biomedical
Engineering, Wayne State University, 263 Farmington Avenue, Detroit, MI 48202,
USA.
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18
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Suzuki S, Lee S, Miyajima T, Kato K, Sugawara-Narutaki A, Sakurai M, Nagata F. Evaluation of Drug-Loading Ability of Poly(Lactic Acid)/Hydroxyapatite Core-Shell Particles. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1959. [PMID: 33919727 PMCID: PMC8070725 DOI: 10.3390/ma14081959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/01/2021] [Accepted: 04/12/2021] [Indexed: 12/12/2022]
Abstract
Poly(lactic acid)/hydroxyapatite (PLA/HAp) core-shell particles are prepared using the emulsification method. These particles are safe for living organisms because they are composed of biodegradable polymers and biocompatible ceramics. These particles are approximately 50-100 nm in size, and their hydrophobic substance loading can be controlled. Hence, PLA/HAp core-shell particles are expected to be used as drug delivery carriers for hydrophobic drugs. In this work, PLA/HAp core-shell particles with a loading of vitamin K1 were prepared, and their drug-loading ability was evaluated. The particles were 40-80 nm in diameter with a PLA core and a HAp shell. The particle size increased with an increase in the vitamin K1 loading. The drug-loading capacity (LC) value of the particles, an indicator of their drug-loading ability, was approximately 250%, which is higher than the previously reported values. The amount of vitamin K1 released from the particles increased as the pH of the soaking solution decreased because the HAp shell easily dissolved under the acidic conditions. The PLA/HAp particles prepared in this work were found to be promising candidates for drug delivery carriers because of their excellent drug-loading ability and pH sensitivity.
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Affiliation(s)
- Seiya Suzuki
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan; (S.S.); (T.M.); (K.K.)
- Department of Applied Chemistry, College of Engineering, Chubu University, Matsumoto-cho, Kasugai 487-8501, Japan;
| | - Sungho Lee
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan; (S.S.); (T.M.); (K.K.)
| | - Tatsuya Miyajima
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan; (S.S.); (T.M.); (K.K.)
| | - Katsuya Kato
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan; (S.S.); (T.M.); (K.K.)
| | - Ayae Sugawara-Narutaki
- Department of Energy Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan;
| | - Makoto Sakurai
- Department of Applied Chemistry, College of Engineering, Chubu University, Matsumoto-cho, Kasugai 487-8501, Japan;
| | - Fukue Nagata
- National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan; (S.S.); (T.M.); (K.K.)
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19
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Dorris ER, Russell J, Murphy M. Post-intubation subglottic stenosis: aetiology at the cellular and molecular level. Eur Respir Rev 2021; 30:30/159/200218. [PMID: 33472959 PMCID: PMC9489001 DOI: 10.1183/16000617.0218-2020] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/20/2020] [Indexed: 02/07/2023] Open
Abstract
Subglottic stenosis (SGS) is a narrowing of the airway just below the vocal cords. This narrowing typically consists of fibrotic scar tissue, which may be due to a variety of diseases. This review focuses on post-intubation (PI) SGS. SGS can result in partial or complete narrowing of the airway. This narrowing is caused by fibrosis and can cause serious breathing difficulties. It can occur in both adults and children. The pathogenesis of post-intubation SGS is not well understood; however, it is considered to be the product of an abnormal healing process. This review discusses how intubation can change the local micro-environment, leading to dysregulated tissue repair. We discuss how mucosal inflammation, local hypoxia and biomechanical stress associated with intubation can promote excess tissue deposition that occurs during the pathological process of SGS. COVID-19 may cause an increased incidence of subglottic stenosis (SGS). In this review, the cellular and molecular aetiology of post-intubation SGS is outlined and we discuss how better knowledge of the underlying biology can inform SGS management.https://bit.ly/2RSliRK
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Affiliation(s)
- Emma R Dorris
- National Children's Research Centre, Our Lady's Children's Hospital, Dublin, Ireland .,School of Medicine, University College Dublin, Dublin, Ireland
| | - John Russell
- Children's Hospital Ireland Crumlin, Dublin, Ireland
| | - Madeline Murphy
- National Children's Research Centre, Our Lady's Children's Hospital, Dublin, Ireland.,School of Medicine, University College Dublin, Dublin, Ireland
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20
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Zheng Z, Chen Y, Hong H, Shen Y, Wang Y, Sun J, Wang X. The "Yin and Yang" of Immunomodulatory Magnesium-Enriched Graphene Oxide Nanoscrolls Decorated Biomimetic Scaffolds in Promoting Bone Regeneration. Adv Healthc Mater 2021; 10:e2000631. [PMID: 33166076 DOI: 10.1002/adhm.202000631] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 10/16/2020] [Indexed: 01/23/2023]
Abstract
Tissue regeneration driven by immunomodulatory agents has emerged as a potential solution for repairing bone defects. However, the therapeutic benefits are compromised by disturbances in the pro- and anti-inflammatory balance. Here, using magnesium nanoparticles (MgNPs) as a template, magnesium-enriched graphene oxide nanoscrolls (MgNPs@GNSs) designed for combinational modulation of the inflammatory response are reported. First, the different effects of graphene oxide (GO) and magnesium ions (Mg2+ ) on Raw264.7 macrophage phenotype transformation are screened. The results reveal that GO activates inflammatory M1 macrophages, and that Mg2+ facilitates repolarization of M1 macrophages to the pro-healing M2 phenotype. With sustained release of Mg2+ , the MgNPs@GNS nanoplatform can orchestrate harmonious type 1 and type 2 inflammatory responses. Mg2+ decrease the internalization of GO and downregulate the nuclear factor kappa-B pathway, which is profoundly involved in the inflammatory process. A series of experiments show that the ordered inflammatory response induced by MgNPs@GNSs stimulates in vitro angiogenesis and osteogenesis through chemotactic, mitogenic, and morphogenic actions. Obvious vascularized bone regeneration is achieved in a rat cranial bone defect model via MgNPs@GNS deposited decellularized bone matrix scaffold. Therefore, the potential of using inherently therapeutic nanomedicine to modulate biomaterial-induced immune responses and thus enhance bone regeneration is demonstrated.
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Affiliation(s)
- Zhiwei Zheng
- Department of Oral and Maxillofacial Head & Neck Oncology Shanghai Key Laboratory Stomatology Shanghai Research Institute of Stomatology Ninth People's Hospital Shanghai Jiao Tong University School of Medicine 639 Zhizaoju Road Shanghai 200011 China
| | - Yahong Chen
- Department of Plastic and Reconstructive Surgery Shanghai Key Laboratory of Tissue Engineering Ninth People's Hospital Shanghai Jiao Tong University School of Medicine National Tissue Engineering Center of China 639 Zhizaoju Road Shanghai 200011 China
| | - Hao Hong
- Medical School of Nanjing University 22 Hankou Road Nanjing Jiangsu 210093 China
| | - Yi Shen
- Department of Oral and Maxillofacial Head & Neck Oncology Shanghai Key Laboratory Stomatology Shanghai Research Institute of Stomatology Ninth People's Hospital Shanghai Jiao Tong University School of Medicine 639 Zhizaoju Road Shanghai 200011 China
| | - Yun Wang
- Department of Plastic and Reconstructive Surgery Shanghai Key Laboratory of Tissue Engineering Ninth People's Hospital Shanghai Jiao Tong University School of Medicine National Tissue Engineering Center of China 639 Zhizaoju Road Shanghai 200011 China
| | - Jian Sun
- Department of Oral and Maxillofacial Head & Neck Oncology Shanghai Key Laboratory Stomatology Shanghai Research Institute of Stomatology Ninth People's Hospital Shanghai Jiao Tong University School of Medicine 639 Zhizaoju Road Shanghai 200011 China
| | - Xiansong Wang
- Department of Plastic and Reconstructive Surgery Shanghai Key Laboratory of Tissue Engineering Ninth People's Hospital Shanghai Jiao Tong University School of Medicine National Tissue Engineering Center of China 639 Zhizaoju Road Shanghai 200011 China
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21
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Abstract
The growing trend for personalized medicine calls for more reliable implantable biosensors that are capable of continuously monitoring target analytes for extended periods (i.e., >30 d). While promising biosensors for various applications are constantly being developed in the laboratories across the world, many struggle to maintain reliable functionality in complex in vivo environments over time. In this review, we explore the impact of various biotic and abiotic failure modes on the reliability of implantable biosensors. We discuss various design considerations for the development of chronically reliable implantable biosensors with a specific focus on strategies to combat biofouling, which is a fundamental challenge for many implantable devices. Briefly, we introduce the process of the foreign body response and compare the in vitro and the in vivo performances of state-of-the-art implantable biosensors. We then discuss the latest development in material science to minimize and delay biofouling including the usage of various hydrophilic, biomimetic, drug-eluting, zwitterionic, and other smart polymer materials. We also explore a number of active anti-biofouling approaches including stimuli-responsive materials and mechanical actuation. Finally, we conclude this topical review with a discussion on future research opportunities towards more reliable implantable biosensors.
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22
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Thompson HM, Lim D, Banks C, Grayson JW, Ayinala S, Cho D, Woodworth BA. Antibiotic eluting sinus stents. Laryngoscope Investig Otolaryngol 2020; 5:598-607. [PMID: 32864430 PMCID: PMC7444760 DOI: 10.1002/lio2.423] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/29/2020] [Accepted: 06/12/2020] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES Chronic rhinosinusitis (CRS) is a multifactorial disease affecting up to 16% of the United States population and disproportionately affecting the cystic fibrosis (CF) patient population. Despite treating the underlying infection, the use of systemic antibiotics has shown little efficacy in alleviation of symptom burden. This review seeks to discuss recent research on novel antibiotic eluting stent therapy in vitro and within animal models as well as the factors that contribute to its efficacy. DATA SOURCES PubMed literature review. REVIEW METHODS A review of all published literature related to antibiotic eluting sinus stents was conducted to integrate and summarize this innovative approach to chronic sinus infections. RESULTS Placement of the ciprofloxacin sinus stent (CSS) and ciprofloxacin-ivacaftor sinus stent (CISS) exhibited improvement in endoscopic and radiographic findings in rabbit CRS models. While the CSS showed an overall trend toward improvement in microscopic findings and a reduction in biofilm mass, there remained a significant quantity of planktonic bacteria due to antibiotic depletion from an initial burst release in the first 48 hours of stent placement. The CISS and ciprofloxacin-azithromycin sinus stents (CASSs) exhibited controlled antibiotic release over the study period leading to greatly reduced planktonic bacterial load and biofilm mass. In vitro studies indicate that CASS may be just as efficacious at reducing biofilm mass. CONCLUSION Antibiotic eluting sinus stents show significant promise as a novel therapeutic strategy for CRS. The CISS may have particular promise for the CF patient population by addressing both the infectious and genetic components of disease. Animal studies demonstrate significant promise for translation into human studies. Human clinical trials are warranted to determine the efficacy of antibiotic sinus stents in human patients. LEVEL OF EVIDENCE NA.
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Affiliation(s)
- Harrison M. Thompson
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Dong‐Jin Lim
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Catherine Banks
- Prince of Wales and Sydney HospitalsUniversity of New South WalesSydneyNew South WalesAustralia
| | - Jessica W. Grayson
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Samrath Ayinala
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Do‐Yeon Cho
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
- Gregory Fleming James Cystic Fibrosis Research CenterBirminghamAlabamaUSA
| | - Bradford A. Woodworth
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
- Gregory Fleming James Cystic Fibrosis Research CenterBirminghamAlabamaUSA
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23
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Jazayeri HE, Lee SM, Kuhn L, Fahimipour F, Tahriri M, Tayebi L. Polymeric scaffolds for dental pulp tissue engineering: A review. Dent Mater 2019; 36:e47-e58. [PMID: 31791734 DOI: 10.1016/j.dental.2019.11.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 10/30/2019] [Accepted: 11/15/2019] [Indexed: 12/23/2022]
Abstract
OBJECTIVES The purpose of this review is to describe recent developments in pulp tissue engineering using scaffolds and/or stem cells. It is crucial to understand how this approach can revitalize damaged dentin-pulp tissue. Widespread scaffold materials, both natural and synthetic, and their fabrication methods, and stem-progenitor cells with the potential of pulp regeneration will be discussed. DATA AND SOURCES A review of literature was conducted through online databases, including MEDLINE by using the PubMed search engine, Scopus, and the Cochrane Library. STUDY SELECTION Studies were selected based on relevance, with a preference given to recent research, particularly from the past decade. CONCLUSIONS The use of biomaterial scaffolds and stem cells can be safe and potent for the regeneration of pulp tissue and re-establishment of tooth vitality. Natural and synthetic polymers have distinct advantages and limitations and in vitro and in vivo testing have produced positive results for cell attachment, proliferation, and angiogenesis. The type of biomaterial used for scaffold fabrication also facilitates stem cell differentiation into odontoblasts and the resulting biochemistry of tissue repair for each polymer and cell type was discussed. Multiple methods of scaffold design exist for pulp tissue engineering, which demonstrates the variability in tissue engineering applications in endodontics. This review explains the potential of evidence-based tissue engineering strategies and outcomes in pulp regeneration.
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Affiliation(s)
- Hossein E Jazayeri
- School of Dental Medicine, University of Pennsylvania, 240 S. 40th Street, Philadelphia, PA 19104, United States
| | - Su-Min Lee
- Department of Endodontics, School of Dental Medicine, University of Pennsylvania, 240 S. 40th Street, Philadelphia, PA 19104, United States
| | - Lauren Kuhn
- Department of Oral Rehabilitation, Division of Endodontics, Medical University of South Carolina, 29 Bee Street, Charleston, SC 29403, United States.
| | - Farahnaz Fahimipour
- Department of Developmental Sciences, Marquette University School of Dentistry, 1801 W Wisconsin Ave, Milwaukee, WI 53233, United States
| | - Mohammadreza Tahriri
- Department of Developmental Sciences, Marquette University School of Dentistry, 1801 W Wisconsin Ave, Milwaukee, WI 53233, United States
| | - Lobat Tayebi
- Department of Developmental Sciences, Marquette University School of Dentistry, 1801 W Wisconsin Ave, Milwaukee, WI 53233, United States
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24
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Shie MY, Shen YF, Astuti SD, Lee AKX, Lin SH, Dwijaksara NLB, Chen YW. Review of Polymeric Materials in 4D Printing Biomedical Applications. Polymers (Basel) 2019; 11:E1864. [PMID: 31726652 PMCID: PMC6918275 DOI: 10.3390/polym11111864] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 11/06/2019] [Accepted: 11/08/2019] [Indexed: 12/30/2022] Open
Abstract
The purpose of 4D printing is to embed a product design into a deformable smart material using a traditional 3D printer. The 3D printed object can be assembled or transformed into intended designs by applying certain conditions or forms of stimulation such as temperature, pressure, humidity, pH, wind, or light. Simply put, 4D printing is a continuum of 3D printing technology that is now able to print objects which change over time. In previous studies, many smart materials were shown to have 4D printing characteristics. In this paper, we specifically review the current application, respective activation methods, characteristics, and future prospects of various polymeric materials in 4D printing, which are expected to contribute to the development of 4D printing polymeric materials and technology.
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Affiliation(s)
- Ming-You Shie
- School of Dentistry, China Medical University, Taichung City 404, Taiwan;
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung City 404, Taiwan; (A.K.-X.L.); (S.-H.L.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung City 413, Taiwan; (Y.-F.S.); (N.L.B.D.)
| | - Yu-Fang Shen
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung City 413, Taiwan; (Y.-F.S.); (N.L.B.D.)
- 3D Printing Medical Research Institute, Asia University, Taichung City 413, Taiwan
| | - Suryani Dyah Astuti
- Biomedical Engineering Study Program, Department of Physic, Faculty of Science and Technology, Univerisitas Airlangga, Surabaya 61115, Indonesia;
| | - Alvin Kai-Xing Lee
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung City 404, Taiwan; (A.K.-X.L.); (S.-H.L.)
- School of Medicine, China Medical University, Taichung City 404, Taiwan
| | - Shu-Hsien Lin
- 3D Printing Medical Research Center, China Medical University Hospital, Taichung City 404, Taiwan; (A.K.-X.L.); (S.-H.L.)
| | - Ni Luh Bella Dwijaksara
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung City 413, Taiwan; (Y.-F.S.); (N.L.B.D.)
- Biomedical Engineering Study Program, Department of Physic, Faculty of Science and Technology, Univerisitas Airlangga, Surabaya 61115, Indonesia;
| | - Yi-Wen Chen
- 3D Printing Medical Research Institute, Asia University, Taichung City 413, Taiwan
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung City 404, Taiwan
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25
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He J, Chen G, Liu M, Xu Z, Chen H, Yang L, Lv Y. Scaffold strategies for modulating immune microenvironment during bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 108:110411. [PMID: 31923946 DOI: 10.1016/j.msec.2019.110411] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 10/21/2019] [Accepted: 11/07/2019] [Indexed: 12/18/2022]
Abstract
Implanted bone scaffolds often fail to successfully integrate with the host tissue because they do not elicit a favorable immune reaction. Properties of bone scaffold not only provide mechanical and chemical signals to support cell adhesion, migration, proliferation and differentiation, but also play a pivotal role in determining the extent of immune response during bone regeneration. Appropriate design parameters of bone scaffold are of great significance in the process of developing a new generation of bone implants. Herein, this article addresses the recent advances in the field of bone scaffolds for immune response, particularly focusing on the physical and chemical properties of bone scaffold in manipulating the host response. Furthermore, incorporation of bioactive molecules and cells with immunoregulatory function in bone scaffolds are also presented. Finally, continuing challenges and future directions of scaffold-based strategies for modulating immune microenvironment are discussed.
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Affiliation(s)
- Jianhua He
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, PR China; Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, PR China.
| | - Guobao Chen
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, PR China; Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, PR China
| | - Mengying Liu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, PR China; Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, PR China
| | - Zhiling Xu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, PR China; Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, PR China.
| | - Hua Chen
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China.
| | - Li Yang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, PR China; Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, PR China.
| | - Yonggang Lv
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, PR China; Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, PR China.
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26
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García-García A, Martin I. Extracellular Matrices to Modulate the Innate Immune Response and Enhance Bone Healing. Front Immunol 2019; 10:2256. [PMID: 31616429 PMCID: PMC6764079 DOI: 10.3389/fimmu.2019.02256] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/06/2019] [Indexed: 01/10/2023] Open
Abstract
Extracellular matrices (ECMs) have emerged as promising off-the-shelf products to induce bone regeneration, with the capacity not only to activate osteoprogenitors, but also to influence the immune response. ECMs generated starting from living cells such as mesenchymal stromal cells (MSCs) have the potential to combine advantages of native tissue-derived ECMs (e.g., physiological presentation of multiple regulatory factors) with those of synthetic ECMs (e.g., customization and reproducibility of composition). MSC-derived ECMs could be tailored by enrichment not only in osteogenic cytokines, but also in immunomodulatory factors, to skew the innate immune response toward regenerative processes. After reviewing the different immunoregulatory properties of ECM components, here we propose different approaches to engineer ECMs enriched in factors capable to regulate macrophage polarization, recruit host immune and mesenchymal cells, and stimulate the synthesis of other immunoinstructive cytokines. Finally, we offer a perspective on the possible evolution of the paradigm based on biological and chemico-physical design considerations, and the use of gene editing approaches.
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Affiliation(s)
- Andrés García-García
- Tissue Engineering, Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Ivan Martin
- Tissue Engineering, Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
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Gaspar D, Peixoto R, De Pieri A, Striegl B, Zeugolis DI, Raghunath M. Local pharmacological induction of angiogenesis: Drugs for cells and cells as drugs. Adv Drug Deliv Rev 2019; 146:126-154. [PMID: 31226398 DOI: 10.1016/j.addr.2019.06.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 05/12/2019] [Accepted: 06/16/2019] [Indexed: 12/12/2022]
Abstract
The past decades have seen significant advances in pro-angiogenic strategies based on delivery of molecules and cells for conditions such as coronary artery disease, critical limb ischemia and stroke. Currently, three major strategies are evolving. Firstly, various pharmacological agents (growth factors, interleukins, small molecules, DNA/RNA) are locally applied at the ischemic region. Secondly, preparations of living cells with considerable bandwidth of tissue origin, differentiation state and preconditioning are delivered locally, rarely systemically. Thirdly, based on the notion, that cellular effects can be attributed mostly to factors secreted in situ, the cellular secretome (conditioned media, exosomes) has come into the spotlight. We review these three strategies to achieve (neo)angiogenesis in ischemic tissue with focus on the angiogenic mechanisms they tackle, such as transcription cascades, specific signalling steps and cellular gases. We also include cancer-therapy relevant lymphangiogenesis, and shall seek to explain why there are often conflicting data between in vitro and in vivo. The lion's share of data encompassing all three approaches comes from experimental animal work and we shall highlight common technical obstacles in the delivery of therapeutic molecules, cells, and secretome. This plethora of preclinical data contrasts with a dearth of clinical studies. A lack of adequate delivery vehicles and standardised assessment of clinical outcomes might play a role here, as well as regulatory, IP, and manufacturing constraints of candidate compounds; in addition, completed clinical trials have yet to reveal a successful and efficacious strategy. As the biology of angiogenesis is understood well enough for clinical purposes, it will be a matter of time to achieve success for well-stratified patients, and most probably with a combination of compounds.
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Affiliation(s)
- Diana Gaspar
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Rita Peixoto
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Andrea De Pieri
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Proxy Biomedical Ltd., Coilleach, Spiddal, Galway, Ireland
| | - Britta Striegl
- Competence Centre Tissue Engineering for Drug Development (TEDD), Centre for Cell Biology & Tissue Engineering, Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Zurich, Switzerland
| | - Dimitrios I Zeugolis
- Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland; Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Michael Raghunath
- Competence Centre Tissue Engineering for Drug Development (TEDD), Centre for Cell Biology & Tissue Engineering, Institute for Chemistry and Biotechnology, Zurich University of Applied Sciences, Zurich, Switzerland.
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Boehler C, Oberueber F, Asplund M. Tuning drug delivery from conducting polymer films for accurately controlled release of charged molecules. J Control Release 2019; 304:173-180. [PMID: 31096016 DOI: 10.1016/j.jconrel.2019.05.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 05/12/2019] [Indexed: 02/01/2023]
Abstract
Spatio-temporally controlled drug release based on conducting polymer films offers a powerful technology to improve the tissue integration for implantable neuroprobes. We here explore the release efficiency of such systems in order to improve the understanding of the release mechanism and allow for optimized implementation of this technology into future drug release applications. By exposing drug loaded PEDOT coatings of different thicknesses to a multitude of release signals, along with optimizing the steps during the polymer synthesis, we could identify a highly reproducible electrostatically controlled drug release next to a slow diffusion driven release component. The release efficiency was moreover observed to be higher for a cyclic voltammetry signal in comparison to release driven by a constant potential. Biphasic current pulses, as used during neural stimulation, did not allow for long enough diffusion times to yield efficient active drug expulsion from the polymer films. A quantitative analysis could confirm an overall linear dependency between drug release and film thickness. The amount of drug released in response to the trigger signals was however not linearly correlated with the amount of charge applied. By combining these findings we could develop a model which accurately describes the drug release mechanism from a PEDOT film. The proposed model thereby points the way for how actively controlled, and diffusion related, release can be tuned for obtaining delivery dynamics tailored to specific applications.
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Affiliation(s)
- Christian Boehler
- BrainLinks-BrainTools Center, University of Freiburg, Germany; Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany.
| | - Felix Oberueber
- BrainLinks-BrainTools Center, University of Freiburg, Germany; Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany
| | - Maria Asplund
- BrainLinks-BrainTools Center, University of Freiburg, Germany; Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany
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Becker MW, Simonovich JA, Phelps EA. Engineered microenvironments and microdevices for modeling the pathophysiology of type 1 diabetes. Biomaterials 2019; 198:49-62. [DOI: 10.1016/j.biomaterials.2018.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 06/21/2018] [Accepted: 07/01/2018] [Indexed: 01/09/2023]
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Biomaterials: Foreign Bodies or Tuners for the Immune Response? Int J Mol Sci 2019; 20:ijms20030636. [PMID: 30717232 PMCID: PMC6386828 DOI: 10.3390/ijms20030636] [Citation(s) in RCA: 329] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 01/22/2019] [Accepted: 01/28/2019] [Indexed: 12/11/2022] Open
Abstract
The perspectives of regenerative medicine are still severely hampered by the host response to biomaterial implantation, despite the robustness of technologies that hold the promise to recover the functionality of damaged organs and tissues. In this scenario, the cellular and molecular events that decide on implant success and tissue regeneration are played at the interface between the foreign body and the host inflammation, determined by innate and adaptive immune responses. To avoid adverse events, rather than the use of inert scaffolds, current state of the art points to the use of immunomodulatory biomaterials and their knowledge-based use to reduce neutrophil activation, and optimize M1 to M2 macrophage polarization, Th1 to Th2 lymphocyte switch, and Treg induction. Despite the fact that the field is still evolving and much remains to be accomplished, recent research breakthroughs have provided a broader insight on the correct choice of biomaterial physicochemical modifications to tune the reaction of the host immune system to implanted biomaterial and to favor integration and healing.
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Wei P, Song R, Chen C, Li Z, Zhu Z, Li S. A pH-Responsive Molecularly Imprinted Hydrogel for Dexamethasone Release. J Inorg Organomet Polym Mater 2018. [DOI: 10.1007/s10904-018-1039-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Gu B, Papadimitrakopoulos F, Burgess DJ. PLGA microsphere/PVA hydrogel coatings suppress the foreign body reaction for 6 months. J Control Release 2018; 289:35-43. [PMID: 30261203 DOI: 10.1016/j.jconrel.2018.09.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/17/2018] [Accepted: 09/22/2018] [Indexed: 01/18/2023]
Abstract
The application of dexamethasone releasing poly (lactic-co-glycolic acid) (PLGA) microspheres embedded in a poly vinyl alcohol (PVA) hydrogel coatings have been successfully used in the suppression of the foreign body response (FBR) to implantable glucose sensors. In the current study, dexamethasone-loaded PLGA microspheres were prepared by blending two types of PLGA polymers (RG503H and DLG7E with MW of ca. 25 kDa and 113 kDa, respectively) to achieve long-term (6 months) inhibition of the FBR. The microsphere composition was optimized according to the in vitro drug release profiles. Microspheres with DLG7E/RG503H/dexamethasone = 70/13.3/16.7 wt% composition, when embedded in a PVA hydrogel, provided a continuous drug release for 6 months. By combining the aforementioned microspheres with microspheres composed solely of the DLG7E polymer within a similar PVA hydrogel realized an even longer (>7 months) in vitro drug release. A heat map was constructed to depict the daily in vitro drug released and elucidate possible lag phases that could affect the pharmacodynamic response. These drug-loaded implant coatings were investigated in vivo (rat model) and showed inhibition of the foreign body response for 6 months. These results suggest that the minimum effective daily dose to counter chronic inflammation is ca. 0.1 μg per mg of coating surrounding a 0.5 × 0.5 × 5 mm silicon implant (dummy sensor). Accordingly, these drug-eluting composite coatings can ensure long-term inflammation control for miniaturized implantable devices.
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Affiliation(s)
- Bing Gu
- University of Connecticut, School of Pharmacy, Storrs, CT 06269, USA
| | | | - Diane J Burgess
- University of Connecticut, School of Pharmacy, Storrs, CT 06269, USA.
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He Y, Yu X, Chen Z, Li L. Stromal vascular fraction cells plus sustained release VEGF/Ang-1-PLGA microspheres improve fat graft survival in mice. J Cell Physiol 2018; 234:6136-6146. [PMID: 30238985 DOI: 10.1002/jcp.27368] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 08/16/2018] [Indexed: 01/17/2023]
Abstract
Autologous fat transplantation is increasingly applied in plastic and reconstructive surgery. Stromal vascular fraction cells (SVFs) combined with angiogenic factors, such as VEGF (vascular endothelial growth factor A) and Ang-1 (angiogenin-1), can improve angiogenesis, which is a critical factor for graft survival. However, direct transplant with such a mixture is insufficient owing to the short half-life of angiogenic factors. In this study, we evaluated whether a double sustained release system of VEGF/ANG-1-PLGA (poly (lactic-co-glycolic acid)) microspheres plus SVFs can improve angiogenesis and graft survival after autologous fat transplantation. VEGF/ANG-1-PLGA-sustained release microspheres were fabricated by a modified double emulsion-solvent evaporation technique. Human aspirated fat was mixed with SVF suspension plus VEGF/ANG-1 sustained release microspheres (Group C), SVF suspension (Group B) alone, or Dulbecco's modified Eagle's medium as the control (Group A). Eighteen immunocompromised nude mice were injected with these three mixtures subcutaneously at random positions. After 8 weeks, the mean volume of grafts was greater in the SVFs plus VEGF/ANG-1-PLGA group than in the control and SVFs groups (1.08 ± 0.069 ml vs. 0.62 ± 0.036 ml, and 0.83 ± 0.059 ml, respectively). Histological assessments showed that lower fibrosis, but greater microvascular density in the SVFs plus VEGF/ANG-1-PLGA group than in the other groups, though the SVFs group also had an appropriate capillary density and reduced fibrosis. Our findings indicate that SVFs plus VEGF/ANG-1-PLGA-sustained release microspheres can improve angiogenesis and graft survival after autologous fat transplantation.
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Affiliation(s)
- Yucang He
- First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiaofang Yu
- First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Zhuojie Chen
- First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Liqun Li
- First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Güler HA, Örnek N, Örnek K, Büyüktortop Gökçınar N, Oğurel T, Yumuşak ME, Onaran Z. Effect of dexamethasone intravitreal implant (Ozurdex®) on corneal endothelium in retinal vein occlusion patients : Corneal endothelium after dexamethasone implant injection. BMC Ophthalmol 2018; 18:235. [PMID: 30180837 PMCID: PMC6122223 DOI: 10.1186/s12886-018-0905-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 08/28/2018] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND To assess corneal endothelial cell changes after intravitreal dexamethasone (DEX) implant (Ozurdex®) injection in patients with macular edema secondary to retinal vein occlusion (RVO). METHODS Twenty-two eyes of 22 patients were assessed prospectively after intravitreal 0.7 mg DEX implant injection. Twenty-two eyes of 22 healthy volunteers served as control group. Corneal endothelial cell parameters including endothelial cell density (ECD), coefficient of variation of cell size (CV), percentage of hexagonality (Hex) and central corneal thickness (CCT) were analyzed before and 1 and 3 months after injection by specular microscopy. The results of the study were compared statistically. RESULTS There were 17 (77.3%) patients with branch RVO and 5 (22.7%) patients with central RVO. Mean intraocular pressure (IOP) was 14.73 mmHg before injection, 17.05 mmHg at 1 month and 17.15 mmHg at 3 months after injection. Mean IOP at 1 and 3 months were significantly higher than pre-injection value (p = 0.002 and p = 0.003, respectively). There was a statistically significant reduction in mean ECD at 3 months after injection compared to pre-injection and 1 month (p = 0.013, p = 0.009, respectively) in the injected eyes. Mean ECD showed no significant difference in the uninjected fellow eyes during the follow up (p>0.05). Mean CV and Hex did not reveal a statistically significant difference in injected and uninjected fellow eyes (p > 0.05). No significant change was observed in mean CCT values during the follow up (p = 0.8). CONCLUSION Intravitreal dexamethasone implant may cause a transient reduction in corneal endothelial cell density in short term without changing cell morphology.
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Affiliation(s)
- Hatice Ayhan Güler
- Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey
- Department of Ophthalmology, Bayburt State Hospital, Bayburt, Turkey
| | - Nurgül Örnek
- Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey
| | - Kemal Örnek
- Department of Ophthalmology, Kudret Eye Hospital, Ankara, Turkey
| | | | - Tevfik Oğurel
- Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey
| | - Mehmet Erhan Yumuşak
- Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey
| | - Zafer Onaran
- Department of Ophthalmology, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey
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Nyström L, Strömstedt AA, Schmidtchen A, Malmsten M. Peptide-Loaded Microgels as Antimicrobial and Anti-Inflammatory Surface Coatings. Biomacromolecules 2018; 19:3456-3466. [DOI: 10.1021/acs.biomac.8b00776] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | | | - Artur Schmidtchen
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-22184 Lund, Sweden
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Abstract
The human body is endowed with an uncanny ability to distinguish self from foreign. The implantation of a foreign object inside a mammalian host activates complex signaling cascades, which lead to biological encapsulation of the implant. This reaction by the host system to a foreign object is known as foreign body response (FBR). Over the last few decades, it has been increasingly important to have a deeper insight into the mechanisms of FBR is needed to develop biomaterials for better integration with living systems. In the light of recent advances in tissue engineering and regenerative medicine, particularly in the field of biosensors and biodegradable tissue engineering scaffolds, the classical concepts related to the FBR have acquired new dimensions. The aim of this review is to provide a holistic view of the FBR, while critically analyzing the challenges, which need to be addressed in the future to overcome this innate response. In particular, this review discusses the relevant experimental methodology to assess the host response. The role of erosion and degradation behavior on FBR with biodegradable polymers is largely explored. Apart from the discussion on temporal progression of FBR, an emphasis has been given to the design of next-generation biomaterials with favorable host response.
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Scholten K, Meng E. A review of implantable biosensors for closed-loop glucose control and other drug delivery applications. Int J Pharm 2018; 544:319-334. [DOI: 10.1016/j.ijpharm.2018.02.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/30/2018] [Accepted: 02/15/2018] [Indexed: 12/19/2022]
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38
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Pugliese E, Coentro JQ, Zeugolis DI. Advancements and Challenges in Multidomain Multicargo Delivery Vehicles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1704324. [PMID: 29446161 DOI: 10.1002/adma.201704324] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 11/05/2017] [Indexed: 06/08/2023]
Abstract
Reparative and regenerative processes are well-orchestrated temporal and spatial events that are governed by multiple cells, molecules, signaling pathways, and interactions thereof. Yet again, currently available implantable devices fail largely to recapitulate nature's complexity and sophistication in this regard. Herein, success stories and challenges in the field of layer-by-layer, composite, self-assembly, and core-shell technologies are discussed for the development of multidomain/multicargo delivery vehicles.
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Affiliation(s)
- Eugenia Pugliese
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Ireland
- Science Foundation Ireland (SFI), Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Ireland
| | - João Q Coentro
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Ireland
- Science Foundation Ireland (SFI), Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Ireland
| | - Dimitrios I Zeugolis
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Ireland
- Science Foundation Ireland (SFI), Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Ireland
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Shamloo A, Sarmadi M, Aghababaie Z, Vossoughi M. Accelerated full-thickness wound healing via sustained bFGF delivery based on a PVA/chitosan/gelatin hydrogel incorporating PCL microspheres. Int J Pharm 2018; 537:278-289. [DOI: 10.1016/j.ijpharm.2017.12.045] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 12/25/2017] [Accepted: 12/26/2017] [Indexed: 12/16/2022]
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40
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Xin X, Guan YX, Yao SJ. Sustained release of dexamethasone from drug-loading PLGA scaffolds with specific pore structure fabricated by supercritical CO2
foaming. J Appl Polym Sci 2018. [DOI: 10.1002/app.46207] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xin Xin
- College of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
| | - Yi-Xin Guan
- College of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
| | - Shan-Jing Yao
- College of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
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Morris AH, Mahal RS, Udell J, Wu M, Kyriakides TR. Multicompartment Drug Release System for Dynamic Modulation of Tissue Responses. Adv Healthc Mater 2017. [PMID: 28636088 DOI: 10.1002/adhm.201700370] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Pharmacological modulation of responses to injury is complicated by the need to deliver multiple drugs with spatiotemporal resolution. Here, a novel controlled delivery system containing three separate compartments with each releasing its contents over different timescales is fabricated. Core-shell electrospun fibers create two of the compartments in the system, while electrosprayed spheres create the third. Utility is demonstrated by targeting the foreign body response to implants because it is a dynamic process resulting in implant failure. Sequential delivery of a drug targeting nuclear factor-κB (NF-κB) and an antifibrotic is characterized in in vitro experiments. Specifically, macrophage fusion and p65 nuclear translocation in the presence of releasate or with macrophages cultured on the surfaces of the constructs are evaluated. In addition, releasate from pirfenidone scaffolds is shown to reduce transforming growth factor-β (TGF-β)-induced pSMAD3 nuclear localization in fibroblasts. In vivo, drug eluting constructs successfully mitigate macrophage fusion at one week and fibrotic encapsulation in a dose-dependent manner at four weeks, demonstrating effective release of both drugs over different timescales. Future studies can employ this system to improve and prolong implant lifetimes, or load it with other drugs to modulate other dynamic processes.
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Affiliation(s)
- Aaron H. Morris
- Department of Biomedical Engineering, Vascular Biology and Therapeutics Program Yale University New Haven CT 06519 USA
| | - Rajwant S. Mahal
- Department of Biomedical Engineering Yale University New Haven CT 06519 USA
| | - Jillian Udell
- Department of Biomedical Engineering Yale University New Haven CT 06519 USA
| | - Michelle Wu
- Department of Biomedical Engineering Yale University New Haven CT 06519 USA
| | - Themis R. Kyriakides
- Department of Biomedical Engineering Department of Pathology, Vascular Biology and Therapeutics Program Yale University New Haven CT 06519 USA
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Boehler C, Kleber C, Martini N, Xie Y, Dryg I, Stieglitz T, Hofmann U, Asplund M. Actively controlled release of Dexamethasone from neural microelectrodes in a chronic in vivo study. Biomaterials 2017; 129:176-187. [DOI: 10.1016/j.biomaterials.2017.03.019] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/08/2017] [Accepted: 03/12/2017] [Indexed: 10/20/2022]
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Chen E, Chu S, Gov L, Kim Y, Lodoen M, Tenner A, Liu W. CD200 modulates macrophage cytokine secretion and phagocytosis in response to poly(lactic co-glycolic acid) microparticles and films. J Mater Chem B 2017; 5:1574-1584. [PMID: 28736613 PMCID: PMC5515357 DOI: 10.1039/c6tb02269c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Biocompatibility is a major concern for developing biomaterials used in medical devices, tissue engineering and drug delivery. Poly(lactic-co-glycolic acid) (PLGA) is one of the most widely used biodegradable materials, yet still triggers a significant foreign body response that impairs healing. Immune cells including macrophages respond to the implanted biomaterial and mediate the host response, which can eventually lead to device failure. Previously in our laboratory, we found that CD200, an immunomodulatory protein, suppressed macrophage inflammatory activation in vitro and reduced local immune cell infiltration around a biomaterial implant. While in our initial study we used polystyrene as a model material, here we investigate the effect of CD200 on PLGA, a commonly used biomaterial with many potential clinical applications. We fabricated PLGA with varied geometries, modified their surfaces with CD200, and examined macrophage cytokine secretion and phagocytosis. We found that CD200 suppressed secretion of the pro-inflammatory cytokine TNF-α and enhanced secretion of the anti-inflammatory cytokine IL-10, suggesting a role for CD200 in promoting wound healing and tissue remodeling. In addition, we found that CD200 increased phagocytosis in both murine macrophages and human monocytes. Together, these data suggest that modification with CD200 leads to a response that simultaneously prevents inflammation and enhances phagocytosis. This immunomodulatory feature may be used as a strategy to mitigate inflammation or deliver drugs or anti-inflammatory agents targeting macrophages.
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Affiliation(s)
- E.Y. Chen
- Department of Chemical Engineering and Materials Science, University of California, Irvine
- The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine
| | - S. Chu
- Department of Molecular Biology and Biochemistry, University of California, Irvine
| | - L. Gov
- Department of Molecular Biology and Biochemistry, University of California, Irvine
| | - Y.K. Kim
- Department of Chemical Engineering and Materials Science, University of California, Irvine
- The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine
- Department of Biomedical Engineering, University of California, Irvine
| | - M.B. Lodoen
- Department of Molecular Biology and Biochemistry, University of California, Irvine
| | - A.J. Tenner
- Department of Molecular Biology and Biochemistry, University of California, Irvine
| | - W.F. Liu
- Department of Chemical Engineering and Materials Science, University of California, Irvine
- The Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine
- Department of Biomedical Engineering, University of California, Irvine
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Soto RJ, Hall JR, Brown MD, Taylor JB, Schoenfisch MH. In Vivo Chemical Sensors: Role of Biocompatibility on Performance and Utility. Anal Chem 2017; 89:276-299. [PMID: 28105839 PMCID: PMC6773264 DOI: 10.1021/acs.analchem.6b04251] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Robert J. Soto
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - Jackson R. Hall
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - Micah D. Brown
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - James B. Taylor
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB 3290, Chapel Hill, NC 27599
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Wu J, He C, He H, Cheng C, Zhu J, Xiao Z, Zhang H, Li X, Zheng J, Xiao J. Importance of zwitterionic incorporation into polymethacrylate-based hydrogels for simultaneously improving optical transparency, oxygen permeability, and antifouling properties. J Mater Chem B 2017; 5:4595-4606. [DOI: 10.1039/c7tb00757d] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The introduction of zwitterionic SBMA into HEMA hydrogels enables to improve optical transparency, oxygen permeability, and antifouling property for contact lenses-based ophthalmic applications.
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46
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Rangel-Argote M, Claudio-Rizo JA, Castellano LE, Vega-González A, Mata-Mata JL, Mendoza-Novelo B. ECM–oligourethene–silica hydrogels as a local drug release system of dexamethasone for stimulating macrophages. RSC Adv 2017. [DOI: 10.1039/c6ra25989h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The incorporation of silica particles inside of extracellular matrix hydrogels supports the loading and releasing of dexamethasone, a therapeutic for modulating macrophage.
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Affiliation(s)
| | - Jesús A. Claudio-Rizo
- Departamento de Ingenierías Química
- Electrónica y Biomédica
- DCI
- Universidad de Guanajuato
- León
| | - Laura E. Castellano
- Departamento de Ingenierías Química
- Electrónica y Biomédica
- DCI
- Universidad de Guanajuato
- León
| | - Arturo Vega-González
- Departamento de Ingenierías Química
- Electrónica y Biomédica
- DCI
- Universidad de Guanajuato
- León
| | - José L. Mata-Mata
- Departamento de Química
- DCNE
- Universidad de Guanajuato
- Guanajuato
- Mexico
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47
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Zhang BJ, He L, Han ZW, Li XG, Zhi W, Zheng W, Mu YD, Weng J. Enhanced osteogenesis of multilayered pore-closed microsphere-immobilized hydroxyapatite scaffold via sequential delivery of osteogenic growth peptide and BMP-2. J Mater Chem B 2017; 5:8238-8253. [DOI: 10.1039/c7tb01970j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accelerated bone regeneration of a novel microsphere-immobilized hydroxyapatite scaffold based on a sequence of steps regulated by two biofactors; this regeneration occurs through an orchestrated sequence of spatial changes.
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Affiliation(s)
- Bing-jun Zhang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- P. R. China
| | - Lei He
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- P. R. China
| | - Zhi-wei Han
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- P. R. China
| | - Xin-guo Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- P. R. China
| | - Wei Zhi
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- P. R. China
| | - Wei Zheng
- Orthopaedic Department
- General Hospital of Chengdu Military Region
- Chengdu
- P. R. China
| | - Yan-dong Mu
- Dental Department
- Sichuan Province People's Hospital
- Chengdu
- P. R. China
| | - Jie Weng
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu
- P. R. China
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48
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Bagherifard S. Mediating bone regeneration by means of drug eluting implants: From passive to smart strategies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 71:1241-1252. [PMID: 27987680 DOI: 10.1016/j.msec.2016.11.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/06/2016] [Accepted: 11/02/2016] [Indexed: 02/03/2023]
Abstract
In addition to excellent biocompatibility and mechanical performance, the new generation of bone and craniofacial implants are expected to proactively contribute to the regeneration process and dynamically interact with the host tissue. To this end, integration and sustained delivery of therapeutic agents has become a rapidly expanding area. The incorporated active molecules can offer supplementary features including promoting oteoconduction and angiogenesis, impeding bacterial infection and modulating host body reaction. Major limitations of the current practices consist of low drug stability overtime, poor control of release profile and kinetics as well as complexity of finding clinically appropriate drug dosage. In consideration of the multifaceted cascade of bone regeneration process, this research is moving towards dual/multiple drug delivery, where precise control on simultaneous or sequential delivery, considering the possible synergetic interaction of the incorporated bioactive factors is of utmost importance. Herein, recent advancements in fabrication of synthetic load bearing implants equipped with various drug delivery systems are reviewed. Smart drug delivery solutions, newly developed to provide higher tempo-spatial control on the delivery of the pharmaceutical agents for targeted and stimuli responsive delivery are highlighted. The future trend of implants with bone drug delivery mechanisms and the most common challenges hindering commercialization and the bench to bedside progress of the developed technologies are covered.
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Affiliation(s)
- Sara Bagherifard
- Politecnico di Milano, Department of Mechanical Engineering, Milan, Italy.
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49
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Bensiamar F, Olalde B, Cifuentes SC, Argarate N, Atorrasagasti G, González-Carrasco JL, García-Rey E, Vilaboa N, Saldaña L. Bioactivity of dexamethasone-releasing coatings on polymer/magnesium composites. Biomed Mater 2016; 11:055011. [DOI: 10.1088/1748-6041/11/5/055011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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50
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Price CF, Burgess DJ, Kastellorizios M. l -DOPA as a small molecule surrogate to promote angiogenesis and prevent dexamethasone-induced ischemia. J Control Release 2016; 235:176-181. [DOI: 10.1016/j.jconrel.2016.05.065] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 05/11/2016] [Accepted: 05/31/2016] [Indexed: 12/19/2022]
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