1
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Maitz MF, Kaiser DPO, Cuberi A, Weich Hernández R, Mühl-Benninghaus R, Tomori T, Gawlitza M. Enhancing thromboresistance of neurovascular nickel-titanium devices with responsive heparin hydrogel coatings. J Neurointerv Surg 2024:jnis-2024-021836. [PMID: 38760168 DOI: 10.1136/jnis-2024-021836] [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: 04/08/2024] [Accepted: 05/01/2024] [Indexed: 05/19/2024]
Abstract
BACKGROUND Neurointerventional devices, particularly laser-cut thin-strut stents made of self-expanding nickel-titanium alloy, are increasingly utilized for endovascular applications in intracranial arteries and dural venous sinuses. Preventing thrombosis and stroke necessitates systemic anticoagulant and antiplatelet therapies with the risk of bleeding complications. Antithrombotic coatings present a promising solution. METHODS In this study, we investigated the potential of hydrogels composed of four-armed poly(ethylene glycol) (starPEG) and heparin, with or without coagulation-responsive heparin release, as coatings for neurovascular devices to mitigate blood clot formation. We evaluated the feasibility and efficacy of these coatings on neurovascular devices through in vitro Chandler-Loop assays and implantation experiments in the supra-aortic arteries of rabbits. RESULTS Stable and coagulation-responsive starPEG-heparin hydrogel coatings exhibited antithrombotic efficacy in vitro, although with a slightly reduced thromboprotection observed in vivo. Furthermore, the hydrogel coatings demonstrated robustness against shear forces encountered during deployment and elicited only marginal humoral and cellular inflammatory responses compared with the reference standards. CONCLUSION Heparin hydrogel coatings offer promising benefits for enhancing the hemocompatibility of neurointerventional devices made of self-expanding nickel-titanium alloy. The variance in performance between in vitro and in vivo settings may be attributed to differences in low- and high-shear blood flow conditions inherent to these models. These models may represent the differences in venous and arterial systems. Further optimization is warranted to tailor the hydrogel coatings for improved efficacy in arterial applications.
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Affiliation(s)
- Manfred F Maitz
- Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Dresden, Sachsen, Germany
| | - Daniel P O Kaiser
- Institute of Neuroradiology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Sachsen, Germany
| | - Ani Cuberi
- Institute of Radiology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Rafaela Weich Hernández
- Institute of Neuroradiology, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Sachsen, Germany
| | | | - Toshiki Tomori
- Department of Diagnostic and Interventional Neuroradiology, University Medical School of Saarland, Homburg/Saar, Germany
| | - Matthias Gawlitza
- Institute of Neuroradiology, University Hospital Leipzig, Leipzig, Sachsen, Germany
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2
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Helmecke T, Hahn D, Ruland A, Tsurkan MV, Maitz MF, Werner C. Adsorbed polymer conjugates to adaptively inhibit blood coagulation activation by medical membranes. J Control Release 2024; 368:344-354. [PMID: 38417559 DOI: 10.1016/j.jconrel.2024.02.034] [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: 08/17/2023] [Revised: 02/14/2024] [Accepted: 02/23/2024] [Indexed: 03/01/2024]
Abstract
Adaptive drug release can combat coagulation and inflammation activation at the blood-material interface with minimized side effects. For that purpose, poly(styrene-alt-maleic-anhydride) copolymers were conjugated to heparin via coagulation-responsive linker peptides and shown to tightly adsorb onto poly(ethersulfone) (PES)-surfaces from aqueous solutions as monolayers. Coagulation-responsive release of unfractionated as well as low molecular weight heparins from the respective coatings was demonstrated to be functionally beneficial in human plasma and whole blood incubation with faster release kinetics resulting in stronger anticoagulant effects. Coated poly(ethersulfone)/poly(vinylpyrrolidone) (PES/PVP) flat membranes proved the technology to offer an easy, effective and robust anticoagulant interfacial functionalization of hemodialysis membranes. In perspective, the modularity of the adaptive release system will be used for inhibiting multiple activation processes.
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Affiliation(s)
- Tina Helmecke
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Hohe Strasse 6, Dresden 01069, Germany
| | - Dominik Hahn
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Hohe Strasse 6, Dresden 01069, Germany
| | - André Ruland
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Hohe Strasse 6, Dresden 01069, Germany
| | - Mikhail V Tsurkan
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Hohe Strasse 6, Dresden 01069, Germany
| | - Manfred F Maitz
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Hohe Strasse 6, Dresden 01069, Germany.
| | - Carsten Werner
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Hohe Strasse 6, Dresden 01069, Germany; Technische Universität Dresden, Cluster of Excellence Physics of Life, Center for Regenerative Therapies Dresden and Faculty of Chemistry and Food Chemistry, Fetscherstraße 105, 01307 Dresden, Germany.
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3
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Tian X, Feng M, Wei X, Cheng C, He K, Jiang T, He B, Gu Z. In situ formed depot of elastin-like polypeptide-hirudin fusion protein for long-acting antithrombotic therapy. Proc Natl Acad Sci U S A 2024; 121:e2314349121. [PMID: 38442174 PMCID: PMC10945803 DOI: 10.1073/pnas.2314349121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 01/30/2024] [Indexed: 03/07/2024] Open
Abstract
Thrombosis, induced by abnormal coagulation or fibrinolytic systems, is the most common pathology associated with many life-threatening cardio-cerebrovascular diseases. However, first-line anticoagulant drugs suffer from rapid drug elimination and risk of hemorrhagic complications. Here, we developed an in situ formed depot of elastin-like polypeptide (ELP)-hirudin fusion protein with a prodrug-like feature for long-term antithrombotic therapy. Highly secretory expression of the fusion protein was achieved with the assistance of the Ffu312 tag. Integration of hirudin, ELP, and responsive moiety can customize fusion proteins with properties of adjustable in vivo retention and controllable recovery of drug bioactivity. After subcutaneous injection, the fusion protein can form a reservoir through temperature-induced coacervation of ELP and slowly diffuse into the blood circulation. The biological activity of hirudin is shielded due to the N-terminal modification, while the activated key proteases upon thrombus occurrence trigger the cleavage of fusion protein together with the release of hirudin, which has antithrombotic activity to counteract thrombosis. We substantiated that the optimized fusion protein produced long-term antithrombotic effects without the risk of bleeding in multiple animal thrombosis models.
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Affiliation(s)
- Xue Tian
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing211816, China
| | - Mingxing Feng
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing211816, China
| | - Xinwei Wei
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Cheng Cheng
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing211816, China
| | - Kaixin He
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Tianyue Jiang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing211816, China
| | - Bingfang He
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing211816, China
| | - Zhen Gu
- Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province, National Key Laboratory of Advanced Drug Delivery and Release Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
- Jinhua Institute of Zhejiang University, Jinhua321299, China
- Department of General Surgery, Sir Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou310016, China
- Liangzhu Laboratory, Hangzhou311121, China
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4
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Doron G, Pearson JJ, Guldberg RE, Temenoff JS. Development and characterization of Factor Xa-responsive materials for applications in cell culture and biologics delivery. J Biomed Mater Res A 2023; 111:634-643. [PMID: 36794576 DOI: 10.1002/jbm.a.37513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/17/2023]
Abstract
Stimuli-responsive biomaterials may be used to better control the release of bioactive molecules or cells for applications involving drug delivery and controlled cell release. In this study, we developed a Factor Xa (FXa)-responsive biomaterial capable of controlled release of pharmaceutical agents and cells from in vitro culture. FXa-cleavable substrates were formed as hydrogels that degraded in response to FXa enzyme over several hours. Hydrogels were shown to release both heparin and a model protein in response to FXa. Additionally, RGD-functionalized FXa-degradable hydrogels were used to culture mesenchymal stromal cells (MSCs), enabling FXa-mediated cell dissociation from hydrogels in a manner that preserved multicellular structures. Harvesting MSCs using FXa-mediated dissociation did not influence their differentiation capacity or indoleamine 2,3-dioxygenase (IDO) activity (a measure of immunomodulatory capacity). In all, this FXa-degradable hydrogel is a novel responsive biomaterial system that may be used for on-demand drug delivery, as well as for improving processes for in vitro culture of therapeutic cells.
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Affiliation(s)
- Gilad Doron
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
| | - Joseph J Pearson
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
| | - Robert E Guldberg
- Knight Campus for Accelerating Scientific Impact, 6231 University of Oregon, Eugene, Oregon, USA
| | - Johnna S Temenoff
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia, USA
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5
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Wilkirson EC, Singampalli KL, Li J, Dixit DD, Jiang X, Gonzalez DH, Lillehoj PB. Affinity-based electrochemical sensors for biomolecular detection in whole blood. Anal Bioanal Chem 2023:10.1007/s00216-023-04627-5. [PMID: 36917265 PMCID: PMC10011785 DOI: 10.1007/s00216-023-04627-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/15/2023]
Abstract
The detection and/or quantification of biomarkers in blood is important for the early detection, diagnosis, and treatment of a variety of diseases and medical conditions. Among the different types of sensors for detecting molecular biomarkers, such as proteins, nucleic acids, and small-molecule drugs, affinity-based electrochemical sensors offer the advantages of high analytical sensitivity and specificity, fast detection times, simple operation, and portability. However, biomolecular detection in whole blood is challenging due to its highly complex matrix, necessitating sample purification (i.e., centrifugation), which involves the use of bulky, expensive equipment and tedious sample-handling procedures. To address these challenges, various strategies have been employed, such as purifying the blood sample directly on the sensor, employing micro-/nanoparticles to enhance the detection signal, and coating the electrode surface with blocking agents to reduce nonspecific binding, to improve the analytical performance of affinity-based electrochemical sensors without requiring sample pre-processing steps or laboratory equipment. In this article, we present an overview of affinity-based electrochemical sensor technologies that employ these strategies for biomolecular detection in whole blood.
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Affiliation(s)
- Elizabeth C Wilkirson
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Kavya L Singampalli
- Department of Bioengineering, Rice University, 6500 Main St., Houston, TX, 77030, USA
- Medical Scientist Training Program, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, 77030, USA
| | - Jiran Li
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Desh Deepak Dixit
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Xue Jiang
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Diego H Gonzalez
- Department of Bioengineering, Rice University, 6500 Main St., Houston, TX, 77030, USA
| | - Peter B Lillehoj
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA.
- Department of Bioengineering, Rice University, 6500 Main St., Houston, TX, 77030, USA.
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6
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Helmecke T, Hahn D, Matzke N, Ferdinand L, Franke L, Kühn S, Fischer G, Werner C, Maitz MF. Inflammation-Controlled Anti-Inflammatory Hydrogels. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206412. [PMID: 36581490 PMCID: PMC9982591 DOI: 10.1002/advs.202206412] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/06/2022] [Indexed: 06/17/2023]
Abstract
While autoregulative adaptation is a common feature of living tissues, only a few feedback-controlled adaptive biomaterials are available so far. This paper herein reports a new polymer hydrogel platform designed to release anti-inflammatory molecules in response to the inflammatory activation of human blood. In this system, anti-inflammatory peptide drugs, targeting either the complement cascade, a complement receptor, or cyclophilin A, are conjugated to the hydrogel by a peptide sequence that is cleaved by elastase released from activated granulocytes. As a proof of concept, the adaptive drug delivery from the gel triggered by activated granulocytes and the effect of the released drug on the respective inflammatory pathways are demonstrated. Adjusting the gel functionalization degree is shown to allow for tuning the drug release profiles to effective doses within a micromolar range. Feedback-controlled delivery of covalently conjugated drugs from a hydrogel matrix is concluded to provide valuable safety features suitable to equip medical devices with highly active anti-inflammatory agents without suppressing the general immunosurveillance.
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Affiliation(s)
- Tina Helmecke
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Dominik Hahn
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Nadine Matzke
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Lisa Ferdinand
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Lars Franke
- Max Planck Institute for Multidisciplinary Sciences37077GöttingenGermany
| | - Sebastian Kühn
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
| | - Gunter Fischer
- Max Planck Institute for Multidisciplinary Sciences37077GöttingenGermany
| | - Carsten Werner
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
- Technische Universität DresdenCluster of Excellence Physics of LifeCenter for Regenerative Therapies Dresden and Faculty of Chemistry and Food ChemistryFetscherstraße 10501307DresdenGermany
| | - Manfred F. Maitz
- Leibniz Institute of Polymer Research DresdenInstitute of Biofunctional Polymer MaterialsHohe Strasse 601069DresdenGermany
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7
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Hale MM, Medina SH. Biomaterials-Enabled Antithrombotics: Recent Advances and Emerging Strategies. Mol Pharm 2022; 19:4453-4465. [PMID: 36149250 PMCID: PMC9728464 DOI: 10.1021/acs.molpharmaceut.2c00626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 12/13/2022]
Abstract
Antithrombotic and thrombolytic therapies are used to prevent, treat, and remove blood clots in various clinical settings, from emergent to prophylactic. While ubiquitous in their healthcare application, short half-lives, off-target effects, overdosing complications, and patient compliance continue to be major liabilities to the utility of these agents. Biomaterials-enabled strategies have the potential to comprehensively address these limitations by creating technologies that are more precise, durable, and safe in their antithrombotic action. In this review, we discuss the state of the art in anticoagulant and thrombolytic biomaterials, covering the nano to macro length scales. We emphasize current methods of formulation, discuss how material properties affect controlled release kinetics, and summarize modern mechanisms of clot-specific drug targeting. The preclinical efficacy of these technologies in an array of cardiovascular applications, including stroke, pulmonary embolism, myocardial infarction, and blood contacting devices, is summarized and performance contrasted. While significant advances have already been made, ongoing development efforts look to deliver bioresponsive "smart" biomaterials that will open new precision medicine opportunities in cardiology.
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Affiliation(s)
- Macy M. Hale
- Department
of Biomedical Engineering, Pennsylvania
State University, University
Park, Pennsylvania 16802-4400, United States
| | - Scott H. Medina
- Department
of Biomedical Engineering, Pennsylvania
State University, University
Park, Pennsylvania 16802-4400, United States
- Huck
Institutes of the Life Sciences, Pennsylvania
State University, University Park, Pennsylvania 16802-4400, United States
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8
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Lu B, Han X, Zou D, Luo X, Liu L, Wang J, Maitz MF, Yang P, Huang N, Zhao A. Catechol-chitosan/polyacrylamide hydrogel wound dressing for regulating local inflammation. Mater Today Bio 2022; 16:100392. [PMID: 36033376 PMCID: PMC9403564 DOI: 10.1016/j.mtbio.2022.100392] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 08/01/2022] [Accepted: 08/02/2022] [Indexed: 11/09/2022]
Abstract
Chronic wounds and the accompanying inflammation are ongoing challenges in clinical treatment. They are usually accompanied by low pH and high oxidative stress environments, limiting cell growth and proliferation. Ordinary medical gauze has limited therapeutic effects on chronic wounds, and there is active research to develop new wound dressings. The chitosan hydrogel could be widely used in biomedical science with great biocompatibility, but the low mechanical properties limit its development. This work uses polyacrylamide to prepare double-network (DN) hydrogels based on bioadhesive catechol-chitosan hydrogels. Cystamine and N, N′-Bis(acryloyl)cystamine, which can be cross-linking agents with disulfide bonds to prepare redox-responsive DN hydrogels and pH-responsive nanoparticles (NPs) prepared by acetalized cyclodextrin (ACD) are used to intelligently release drugs against chronic inflammation microenvironments. The addition of catechol groups and ACD-NPs loaded with the Resolvin E1 (RvE1), promotes cell adhesion and regulates the inflammatory response at the wound site. The preparation of the DN hydrogel in this study can be used to treat and regulate the inflammatory microenvironment of chronic wounds accurately. It provides new ideas for using inflammation resolving factor loaded in DN hydrogel of good biocompatibility with enhanced mechanical properties to intelligent regulate the wound inflammation and promote the wound repaired. Dual-response hydrogel drug delivery system was used to intelligently release drugs at inflammation area of chronic wound. DN hydrogel was designed to enhance the properties of chitosan-based hydrogel with two cross-linking agents. Resolvin E1 loaded into wound dressing can help to regulate wound inflammation by regulating macrophage behavior.
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Affiliation(s)
- Bingyang Lu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Xiao Han
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Dan Zou
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Xiao Luo
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China.,School of Medicine, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Li Liu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Jingyue Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Manfred F Maitz
- Leibniz-Institute of Polymer Research Dresden, Max Bergmann Center of Biomaterials Dresden, Hohe Strasse 6, 01069, Dresden, Germany
| | - Ping Yang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Nan Huang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Ansha Zhao
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, China.,School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
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9
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Chong-Boon Ong, Mohamad Suffian Mohamad Annuar. Hydrogels Responsive Towards Important Biological-Based Stimuli. POLYMER SCIENCE SERIES B 2022. [DOI: 10.1134/s1560090422200015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Wang Y, Wu H, Zhou Z, Maitz MF, Liu K, Zhang B, Yang L, Luo R, Wang Y. A thrombin-triggered self-regulating anticoagulant strategy combined with anti-inflammatory capacity for blood-contacting implants. SCIENCE ADVANCES 2022; 8:eabm3378. [PMID: 35245113 PMCID: PMC8896797 DOI: 10.1126/sciadv.abm3378] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 01/13/2022] [Indexed: 05/17/2023]
Abstract
Interrelated coagulation and inflammation are impediments to endothelialization, a prerequisite for the long-term function of cardiovascular materials. Here, we proposed a self-regulating anticoagulant coating strategy combined with anti-inflammatory capacity, which consisted of thrombin-responsive nanogels with anticoagulant and anti-inflammatory components. As an anticoagulant, rivaroxaban was encapsulated in nanogels cross-linked by thrombin-cleavable peptide and released upon the trigger of environmental thrombin, blocking the further coagulation cascade. The superoxide dismutase mimetic Tempol imparted the antioxidant property. Polyphenol epigallocatechin gallate (EGCG), in addition to its anti-inflammatory function in synergy with Tempol, also acted as a weak cross-linker to stabilize the coating. The effectiveness and versatility of this coating were validated using two typical cardiovascular devices as models, biological valves and vascular stents. It was demonstrated that the coating worked as a precise strategy to resist coagulation and inflammation, escorted reendothelialization on the cardiovascular devices, and provided a new perspective for designing endothelium-like functional coatings.
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Affiliation(s)
- Yanan Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Haoshuang Wu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Zhongyi Zhou
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Manfred F. Maitz
- Leibniz Institute of Polymer Research Dresden, Max Bergmann Center of Biomaterials Dresden, Dresden 01069, Germany
- Key Laboratory for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Kunpeng Liu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Bo Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Li Yang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Rifang Luo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
- Corresponding author. (R.L.); (Yunbing Wang)
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
- Corresponding author. (R.L.); (Yunbing Wang)
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11
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Hahn D, Sonntag JM, Lück S, Maitz MF, Freudenberg U, Jordan R, Werner C. Poly(2-alkyl-2-oxazoline)-Heparin Hydrogels-Expanding the Physicochemical Parameter Space of Biohybrid Materials. Adv Healthc Mater 2021; 10:e2101327. [PMID: 34541827 DOI: 10.1002/adhm.202101327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/10/2021] [Indexed: 12/19/2022]
Abstract
Poly(ethylene glycol) (PEG)-glycosaminoglycan (GAG) hydrogel networks are established as very versatile biomaterials. Herein, the synthetic gel component of the biohybrid materials is systematically varied by combining different poly(2-alkyl-2-oxazolines) (POx) with heparin applying a Michael-type addition crosslinking scheme: POx of gradated hydrophilicity and temperature-responsiveness provides polymer networks of distinctly different stiffness and swelling. Adjusting the mechanical properties and the GAG concentration of the gels to similar values allows for modulating the release of GAG-binding growth factors (VEGF165 and PDGF-BB) by the choice of the POx and its temperature-dependent conformation. Adsorption of fibronectin, growth of fibroblasts, and bacterial adhesion scale with the hydrophobicity of the gel-incorporated POx. In vitro hemocompatibility tests with freshly drawn human whole blood show advantages of POx-based gels compared to the PEG-based reference materials. Biohybrid POx hydrogels can therefore enable biomedical technologies requiring GAG-based materials with customized and switchable physicochemical characteristics.
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Affiliation(s)
- Dominik Hahn
- Leibniz Institute of Polymer Research Dresden Max‐Bergmann Center of Biomaterials Dresden Hohe Str. 6 01069 Dresden Germany
| | - Jannick M. Sonntag
- Dresden Initiative for Bioactive Interfaces & Materials Technische Universität Dresden Mommsenstr. 4 01069 Dresden Germany
- Professur für Makromolekulare Chemie Faculty of Chemistry and Food Chemistry Technische Universität Dresden Mommsenstr. 4 01069 Dresden Germany
| | - Steffen Lück
- Dresden Initiative for Bioactive Interfaces & Materials Technische Universität Dresden Mommsenstr. 4 01069 Dresden Germany
- Professur für Makromolekulare Chemie Faculty of Chemistry and Food Chemistry Technische Universität Dresden Mommsenstr. 4 01069 Dresden Germany
| | - Manfred F. Maitz
- Leibniz Institute of Polymer Research Dresden Max‐Bergmann Center of Biomaterials Dresden Hohe Str. 6 01069 Dresden Germany
| | - Uwe Freudenberg
- Leibniz Institute of Polymer Research Dresden Max‐Bergmann Center of Biomaterials Dresden Hohe Str. 6 01069 Dresden Germany
| | - Rainer Jordan
- Dresden Initiative for Bioactive Interfaces & Materials Technische Universität Dresden Mommsenstr. 4 01069 Dresden Germany
- Professur für Makromolekulare Chemie Faculty of Chemistry and Food Chemistry Technische Universität Dresden Mommsenstr. 4 01069 Dresden Germany
| | - Carsten Werner
- Leibniz Institute of Polymer Research Dresden Max‐Bergmann Center of Biomaterials Dresden Hohe Str. 6 01069 Dresden Germany
- Center for Regenerative Therapies Dresden (CRTD) Fetscherstr. 105 01307 Dresden Germany
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12
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Bioresponsive starPEG-heparin hydrogel coatings on vascular stents for enhanced hemocompatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112268. [PMID: 34474827 DOI: 10.1016/j.msec.2021.112268] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 04/02/2021] [Accepted: 06/13/2021] [Indexed: 11/20/2022]
Abstract
Hydrogel coatings can improve the biocompatibility of medical devices. However, stable surface bonding and homogeneity of hydrogel coatings are often challenging. This study exploits the benefits of biohybrid hydrogels of crosslinked four-armed poly(ethylene glycol) and heparin to enhance the hemocompatibility of cobalt‑chromium (CoCr) vascular stents. A bonding layer of dual silane and poly(ethylene-alt-maleic anhydride) (PEMA) treatment was applied to the stent to provide covalent immobilization and hydrophilicity for the homogeneous spreading of the hydrogel. A spray coating technology was used to distribute the aqueous solution of the reactive hydrogel precursors onto the sub-millimeter struts of the stents, where the solution polymerized to a homogeneous hydrogel film. The coating was mechanically stable on the stent after ethanol dehydration, and the stents could be stored in a dry state. The homogeneity and stability of the coating during stent expansion were verified. Quasistatic and dynamic whole blood incubation experiments showed substantial suppression of the pro-coagulant and inflammatory activity of the bare metal by the coating. Translation of the technology to industrial coating devices and future surface modification of stents with anti-inflammatory hydrogels are discussed.
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13
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Ashcraft M, Douglass M, Chen Y, Handa H. Combination strategies for antithrombotic biomaterials: an emerging trend towards hemocompatibility. Biomater Sci 2021; 9:2413-2423. [PMID: 33599226 PMCID: PMC8035307 DOI: 10.1039/d0bm02154g] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Surface-induced thrombosis is a frequent, critical issue for blood-contacting medical devices that poses a serious threat to patient safety and device functionality. Antithrombotic material design strategies including the immobilization of anticoagulants, alterations in surface chemistries and morphology, and the release of antithrombotic compounds have made great strides in the field with the ultimate goal of circumventing the need for systemic anticoagulation, but have yet to achieve the same hemocompatibility as the native endothelium. Given that the endothelium achieves this state through the use of many mechanisms of action, there is a rising trend in combining these established design strategies for improved antithrombotic actions. Here, we describe this emerging paradigm, highlighting the apparent advantages of multiple antithrombotic mechanisms of action and discussing the demonstrated potential of this new direction.
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Affiliation(s)
- Morgan Ashcraft
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, Georgia 30602, USA.
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14
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Vlcek JR, Hedayati M, Melvin AC, Reynolds MM, Kipper MJ. Blood-Compatible Materials: Vascular Endothelium-Mimetic Surfaces that Mitigate Multiple Cell-Material Interactions. Adv Healthc Mater 2021; 10:e2001748. [PMID: 33448158 DOI: 10.1002/adhm.202001748] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Indexed: 12/17/2022]
Abstract
When flowing whole blood contacts medical device surfaces, the most common blood-material interactions result in coagulation, inflammation, and infection. Many new blood-contacting biomaterials have been proposed based on strategies that address just one of these common modes of failure. This study proposes to mitigate unfavorable biological reactions that occur with blood-contacting medical devices by designing multifunctional surfaces, with features optimized to meet multiple performance criteria. These multifunctional surfaces incorporate the release of the small molecule hormone nitric oxide (NO) with surface chemistry and nanotopography that mimic features of the vascular endothelial glycocalyx. These multifunctional surfaces have features that interact with coagulation components, inflammatory cells, and bacterial cells. While a single surface feature alone may not be sufficient to achieve multiple functions, the release of NO from the surfaces along with their modification to mimic the endothelial glycocalyx synergistically improves platelet-, leukocyte-, and bacteria-surface interactions. This work demonstrates that new blood-compatible materials should be designed with multiple features, to better address the multiple modes of failure of blood-contacting medical devices.
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Affiliation(s)
- Jessica R. Vlcek
- School of Biomedical Engineering Colorado State University Fort Collins CO 80523 USA
| | - Mohammadhasan Hedayati
- Department of Chemical and Biological Engineering Colorado State University Fort Collins CO 80523 USA
| | - Alyssa C. Melvin
- Department of Chemistry Colorado State University Fort Collins CO 80532 USA
| | - Melissa M. Reynolds
- Department of Chemistry Department of Chemical and Biological Engineering, and School of Biomedical Engineering Colorado State University Fort Collins CO 80523 USA
| | - Matt J. Kipper
- Department of Chemical and Biological Engineering School of Biomedical Engineering, and School of Advanced Materials Discovery Colorado State University Fort Collins CO 80523 USA
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15
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Obstals F, Witzdam L, Garay-Sarmiento M, Kostina NY, Quandt J, Rossaint R, Singh S, Grottke O, Rodriguez-Emmenegger C. Improving Hemocompatibility: How Can Smart Surfaces Direct Blood To Fight against Thrombi. ACS APPLIED MATERIALS & INTERFACES 2021; 13:11696-11707. [PMID: 33656864 DOI: 10.1021/acsami.1c01079] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nature utilizes endothelium as a blood interface that perfectly controls hemostasis, preventing the uncontrolled formation of thrombi. The management of positive and negative feedback that finely tunes thrombosis and fibrinolysis is essential for human life, especially for patients who undergo extracorporeal circulation (ECC) after a severe respiratory or cardiac failure. The exposure of blood to a surface different from healthy endothelium inevitably initiates coagulation, drastically increasing the mortality rate by thromboembolic complications. In the present study, an ultrathin antifouling fibrinolytic coating capable of disintegrating thrombi in a self-regulated manner is reported. The coating system is composed of a polymer brush layer that can prevent any unspecific interaction with blood. The brushes are functionalized with a tissue plasminogen activator (tPA) to establish localized fibrinolysis that solely and exclusively is active when it is required. This interactive switching between the dormant and active state is realized through an amplification mechanism that increases (positive feedback) or restores (negative feedback) the activity of tPA depending on whether a thrombus is detected and captured or not. Thus, only a low surface density of tPA is necessary to lyse real thrombi. Our work demonstrates the first report of a coating that self-regulates its fibrinolytic activity depending on the conditions of blood.
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Affiliation(s)
- Fabian Obstals
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
| | - Lena Witzdam
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
| | - Manuela Garay-Sarmiento
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
| | - Nina Yu Kostina
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
| | - Jonas Quandt
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
| | - Rolf Rossaint
- University Hospital Aachen, Pauwelsstraße 30, Aachen D-52074, Germany
| | - Smriti Singh
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
| | - Oliver Grottke
- University Hospital Aachen, Pauwelsstraße 30, Aachen D-52074, Germany
| | - Cesar Rodriguez-Emmenegger
- DWI - Leibniz-Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen D-52074, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Forckenbeckstraße 50, Aachen D-52074, Germany
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16
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Brouns JP, Dankers PYW. Introduction of Enzyme-Responsivity in Biomaterials to Achieve Dynamic Reciprocity in Cell-Material Interactions. Biomacromolecules 2021; 22:4-23. [PMID: 32813514 PMCID: PMC7805013 DOI: 10.1021/acs.biomac.0c00930] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/19/2020] [Indexed: 12/11/2022]
Abstract
Much effort has been made in the development of biomaterials that synthetically mimic the dynamics of the natural extracellular matrix in tissues. Most of these biomaterials specifically interact with cells, but lack the ability to adapt and truly communicate with the cellular environment. Communication between biomaterials and cells is achieved by the development of various materials with enzyme-responsive moieties in order to respond to cellular cues. In this perspective, we discuss different enzyme-responsive systems, from surfaces to supramolecular assemblies. Additionally, we highlight their further prospects in order to create, inspired by nature, fully autonomous adaptive biomaterials that display dynamic reciprocal behavior. This Perspective shows new strategies for the development of biomaterials that may find broad utility in regenerative medicine applications, from scaffolds for tissue engineering to systems for controlled drug delivery.
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Affiliation(s)
- Joyce
E. P. Brouns
- Eindhoven University of
Technology, Institute for Complex
Molecular Systems, Department of Biomedical Engineering, Laboratory
of Chemical Biology, Het
Kranenveld 14, 5612 AZ, Eindhoven, The Netherlands
| | - Patricia Y. W. Dankers
- Eindhoven University of
Technology, Institute for Complex
Molecular Systems, Department of Biomedical Engineering, Laboratory
of Chemical Biology, Het
Kranenveld 14, 5612 AZ, Eindhoven, The Netherlands
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17
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Yang Y, Xiao Y. Biomaterials Regulating Bone Hematoma for Osteogenesis. Adv Healthc Mater 2020; 9:e2000726. [PMID: 32691989 DOI: 10.1002/adhm.202000726] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/18/2020] [Indexed: 12/11/2022]
Abstract
Blood coagulation in tissue healing not only prevents blood loss, but also forms a natural scaffold for tissue repair and regeneration. As blood clot formation is the initial and foremost phase upon bone injury, and the quality of blood clot (hematoma) orchestrates the following inflammatory and cellular processes as well as the subsequent callus formation and bone remodeling process. Inspired by the natural healing hematoma, tissue-engineered biomimic scaffold/hydrogels and blood prefabrication strategies attract significant interests in developing functional bone substitutes. The alteration of the fracture hematoma ca significantly accelerate or impair the overall bone healing process. This review summarizes the impact of biomaterials on blood coagulation and provides evidence on fibrin network structure, growth factors, and biomolecules that contribute to bone healing within the hematoma. The aim is to provide insights into the development of novel implant and bone biomaterials for enhanced osteogenesis. Advances in the understanding of biomaterial characteristics (e.g., morphology, chemistry, wettability, and protein adsorption) and their effect on hematoma properties are highlighted. Emphasizing the importance of the initial healing phase of the hematoma endows the design of advanced biomaterials with the desired regulatory properties for optimal coagulation and hematoma properties, thereby facilitating enhanced osteogenesis and ideal therapeutic effects.
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Affiliation(s)
- Ying Yang
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
- Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane, QLD, 4059, Australia
| | - Yin Xiao
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4059, Australia
- Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane, QLD, 4059, Australia
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18
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Intelligent H2S release coating for regulating vascular remodeling. Bioact Mater 2020; 6:1040-1050. [PMID: 33102945 PMCID: PMC7567040 DOI: 10.1016/j.bioactmat.2020.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/20/2020] [Accepted: 09/26/2020] [Indexed: 12/18/2022] Open
Abstract
Coronary atherosclerotic lesions exhibit a low-pH chronic inflammatory response. Due to insufficient drug release control, drug-eluting stent intervention can lead to delayed endothelialization, advanced thrombosis, and unprecise treatment. In this study, hyaluronic acid and chitosan were used to prepare pH-responsive self-assembling films. The hydrogen sulfide (H2S) releasing aspirin derivative ACS14 was used as drug in the film. The film regulates the release of the drug adjusted to the microenvironment of the lesion, and the drug balances the vascular function by releasing the regulating gas H2S, which comparably to NO promotes the self-healing capacity of blood vessels. Drug releasing profiles of the films at different pH, and other biological effects on blood vessels were evaluated through blood compatibility, cellular, and implantation experiments. This novel method of self-assembled films which H2S in an amount, which is adjusted to the condition of the lesion provides a new concept for the treatment of cardiovascular diseases. PH-responsive self-assembling films were used to intelligently release the drugs at atherosclerotic lesions. As a gaseous signaling molecule, H2S donor ACS14 was loaded into the films used in the field of cardiovascular disease treatment. H2S can help to regulate vascular remodeling and balance the vascular function.
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19
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Parada G, Yu Y, Riley W, Lojovich S, Tshikudi D, Ling Q, Zhang Y, Wang J, Ling L, Yang Y, Nadkarni S, Nabzdyk C, Zhao X. Ultrathin and Robust Hydrogel Coatings on Cardiovascular Medical Devices to Mitigate Thromboembolic and Infectious Complications. Adv Healthc Mater 2020; 9:e2001116. [PMID: 32940970 DOI: 10.1002/adhm.202001116] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/21/2020] [Indexed: 01/10/2023]
Abstract
Thromboembolic and infectious complications stemming from the use of cardiovascular medical devices are still common and result in significant morbidity and mortality. There is no strategy to date that effectively addresses both challenges at the same time. Various surface modification strategies (e.g., silver, heparin, and liquid-impregnated surfaces) are proposed yet each has several limitations and shortcomings. Here, it is shown that the incorporation of an ultrathin and mechanically robust hydrogel layer reduces bacterial adhesion to medical-grade tubing by 95%. It is additionally demonstrated, through a combination of in vitro and in vivo tests, that the hydrogel layer significantly reduces the formation and adhesion of blood clots to the tubing without affecting the blood's intrinsic clotting ability. The adhesion of clots to the tubing walls is reduced by over 90% (in vitro model), which results in an ≈60% increase in the device occlusion time (time before closure due to clot formation) in an in vivo porcine model. The advantageous properties of this passive coating make it a promising surface material candidate for medical devices interfacing with blood.
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Affiliation(s)
- German Parada
- Chemical Engineering Department Massachusetts Institute of Technology Cambridge MA 02139 USA
- Mechanical Engineering Department Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Yan Yu
- Mechanical Engineering Department Massachusetts Institute of Technology Cambridge MA 02139 USA
- School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430064 China
| | - William Riley
- Perfusion Services Massachusetts General Hospital Boston MA 02114 USA
| | - Sarah Lojovich
- Perfusion Services Massachusetts General Hospital Boston MA 02114 USA
| | - Diane Tshikudi
- Wellman Center for Photomedicine Massachusetts General Hospital Boston MA 02114 USA
| | - Qing Ling
- Tongji Medical School Huazhong University of Science and Technology Wuhan Hubei 430064 China
| | - Yefang Zhang
- Tongji Medical School Huazhong University of Science and Technology Wuhan Hubei 430064 China
| | - Jiaxin Wang
- Tongji Medical School Huazhong University of Science and Technology Wuhan Hubei 430064 China
| | - Lei Ling
- Tongji Medical School Huazhong University of Science and Technology Wuhan Hubei 430064 China
| | - Yueying Yang
- Mechanical Engineering Department Massachusetts Institute of Technology Cambridge MA 02139 USA
- School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan Hubei 430064 China
| | - Seemantini Nadkarni
- Wellman Center for Photomedicine Massachusetts General Hospital Boston MA 02114 USA
| | - Christoph Nabzdyk
- Department of Anesthesia Critical Care and Pain Medicine Massachusetts General Hospital Boston MA 02114 USA
- Department of Anesthesiology and Perioperative Medicine Mayo Clinic Rochester Rochester MN 55902 USA
| | - Xuanhe Zhao
- Mechanical Engineering Department Massachusetts Institute of Technology Cambridge MA 02139 USA
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20
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Yang Y, Yin S, He C, Wu X, Yin J, Zhang J, Ma L, Zhao W, Cheng C, Zhao C. Construction of Kevlar nanofiber/graphene oxide composite beads as safe, self-anticoagulant, and highly efficient hemoperfusion adsorbents. J Mater Chem B 2020; 8:1960-1970. [PMID: 32067017 DOI: 10.1039/c9tb02789k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Recently emerged hemoperfusion absorbents, e.g. ion-exchange resin, activated carbon, and other porous materials, provide numerous novel possibilities to cure chronic liver failure (CLF) and renal failure (CRF). However, the limited adsorption performance and unsatisfactory blood compatibility significantly impede the development of the absorbents. Hence, designing safe and self-anticoagulant hemoperfusion absorbents with robust toxin clearance remains a considerable challenge. Here, brand new Kevlar-based composite gel beads for hemoperfusion are prepared by interface assembly based on π-π interaction. First, Kevlar nanofiber-graphene oxide (K-GO) beads are produced by liquid-liquid phase separation. Then, sodium p-styrenesulfonate (SS) is adsorbed onto the K-GO interface by π-π interaction and initiated to achieve the composite gel (K-GO/PSS) beads with an interfacial crosslinked structure. Such composite gel beads possess superior mechanical strength and self-anticoagulation capability, owing to the dual-network structure and heparin-mimicking gel structure, respectively. Furthermore, the K-GO/PSS beads show robust adsorption capacities for different kinds of toxins due to their strong charge and π-π interactions. A simulated hemoperfusion experiment in vitro demonstrates that the concentrations of the toxins in the blood can be restored to normal values within 30 minutes. In general, we envision that such composite gel beads will provide new strategies for future clinical CLF and CRF treatments.
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Affiliation(s)
- Ye Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Shiqi Yin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Chao He
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Xizheng Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jiarui Yin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jue Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Lang Ma
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Weifeng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Chong Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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21
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Hachim D, Whittaker TE, Kim H, Stevens MM. Glycosaminoglycan-based biomaterials for growth factor and cytokine delivery: Making the right choices. J Control Release 2019; 313:131-147. [PMID: 31629041 PMCID: PMC6900262 DOI: 10.1016/j.jconrel.2019.10.018] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 12/21/2022]
Abstract
Controlled, localized drug delivery is a long-standing goal of medical research, realization of which could reduce the harmful side-effects of drugs and allow more effective treatment of wounds, cancers, organ damage and other diseases. This is particularly the case for protein "drugs" and other therapeutic biological cargoes, which can be challenging to deliver effectively by conventional systemic administration. However, developing biocompatible materials that can sequester large quantities of protein and release them in a sustained and controlled manner has proven challenging. Glycosaminoglycans (GAGs) represent a promising class of bio-derived materials that possess these key properties and can additionally potentially enhance the biological effects of the delivered protein. They are a diverse group of linear polysaccharides with varied functionalities and suitabilities for different cargoes. However, most investigations so far have focused on a relatively small subset of GAGs - particularly heparin, a readily available, promiscuously-binding GAG. There is emerging evidence that for many applications other GAGs are in fact more suitable for regulated and sustained delivery. In this review, we aim to illuminate the beneficial properties of various GAGs with reference to specific protein cargoes, and to provide guidelines for informed choice of GAGs for therapeutic applications.
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Affiliation(s)
- Daniel Hachim
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Thomas E Whittaker
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Hyemin Kim
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Molly M Stevens
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom.
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22
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Chen H, Shao S, Yu Y, Huang Y, Zhu X, Zhang S, Fan J, Yin GY, Chi B, Wan M, Mao C. A dual-responsive biosensor for blood lead detection. Anal Chim Acta 2019; 1093:131-141. [PMID: 31735206 DOI: 10.1016/j.aca.2019.09.062] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 09/23/2019] [Indexed: 12/17/2022]
Abstract
Simple and accurate detection of trace heavy metals in blood is very important. A novel dual-responsive electrochemical/fluorescent biosensor based on magnetic hyperbranched polyamide with heparin modification (MHPAM-H) for blood lead detection has been successfully developed. Upon conjugated with blood lead ions, dual-biosensor could not only display electrochemical signal but also fluorescence signal owing to the enriched amino groups, cavity structure, and good fluorescence properties of HPAM. Blood biocompatibility, construction of the dual-responsive biosensor, electrochemical/fluorescent detection of lead ions in water phase and blood condition, selectivity and stability of the dual-responsive biosensor were investigated in detail. The proposed dual-responsive biosensor displays good linear relationship (1.5 pM- 4.8 × 103 pM for electrochemical detection and 0.5 pM-4.8 × 103 pM for fluorescent detection) with low detection limit (4.4 pM for electrochemical detection and 1.0 pM for fluorescent detection) for blood lead, providing potential application for blood lead detection in the future.
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Affiliation(s)
- Huan Chen
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Shuibin Shao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Yueqi Yu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Yangyang Huang
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Xiaotan Zhu
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Shiyan Zhang
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Jin Fan
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 211166, China
| | - Guo Yong Yin
- Department of Orthopaedics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 211166, China
| | - Bo Chi
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China
| | - Mimi Wan
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China.
| | - Chun Mao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China.
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23
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Maitz MF, Martins MCL, Grabow N, Matschegewski C, Huang N, Chaikof EL, Barbosa MA, Werner C, Sperling C. The blood compatibility challenge. Part 4: Surface modification for hemocompatible materials: Passive and active approaches to guide blood-material interactions. Acta Biomater 2019; 94:33-43. [PMID: 31226481 DOI: 10.1016/j.actbio.2019.06.019] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/29/2019] [Accepted: 06/13/2019] [Indexed: 12/22/2022]
Abstract
Biomedical devices in the blood flow disturb the fine-tuned balance of pro- and anti-coagulant factors in blood and vessel wall. Numerous technologies have been suggested to reduce coagulant and inflammatory responses of the body towards the device material, ranging from camouflage effects to permanent activity and further to a responsive interaction with the host systems. However, not all types of modification are suitable for all types of medical products. This review has a focus on application-oriented considerations of hemocompatible surface fittings. Thus, passive versus bioactive modifications are discussed along with the control of protein adsorption, stability of the immobilization, and the type of bioactive substance, biological or synthetic. Further considerations are related to the target system, whether enzymes or cells should be addressed in arterial or venous system, or whether the blood vessel wall is addressed. Recent developments like feedback controlled or self-renewing systems for drug release or addressing cellular regulation pathways of blood platelets and endothelial cells are paradigms for a generation of blood contacting devices, which are hemocompatible by cooperation with the host system. STATEMENT OF SIGNIFICANCE: This paper is part 4 of a series of 4 reviews discussing the problem of biomaterial associated thrombogenicity. The objective was to highlight features of broad agreement and provide commentary on those aspects of the problem that were subject to dispute. We hope that future investigators will update these reviews as new scholarship resolves the uncertainties of today.
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Affiliation(s)
- Manfred F Maitz
- Institute Biofunctional Polymer Materials, Max Bergmann Center of Biomaterials, Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany; Key Laboratory of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - M Cristina L Martins
- i3S, Instituto de Investigação e Inovação em Saúde, Portugal; INEB, Instituto de Engenharia Biomédica, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Niels Grabow
- Institut für Biomedizinische Technik, Universitätsmedizin Rostock, Friedrich-Barnewitz-Str. 4, 18119 Rostock, Germany
| | - Claudia Matschegewski
- Institut für Biomedizinische Technik, Universitätsmedizin Rostock, Friedrich-Barnewitz-Str. 4, 18119 Rostock, Germany; Institute for ImplantTechnology and Biomaterials (IIB) e.V., Friedrich-Barnewitz-Str. 4, 18119 Rostock, Germany
| | - Nan Huang
- Key Laboratory of Advanced Technology for Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Elliot L Chaikof
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02115, United States; Wyss Institute for Biologically Inspired Engineering at Harvard University, 3 Blackfan Circle, Boston, MA 02115, United States; Harvard-MIT Division of Health Sciences and Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States
| | - Mário A Barbosa
- i3S, Instituto de Investigação e Inovação em Saúde, Portugal; INEB, Instituto de Engenharia Biomédica, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; ICBAS, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Carsten Werner
- Institute Biofunctional Polymer Materials, Max Bergmann Center of Biomaterials, Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany
| | - Claudia Sperling
- Institute Biofunctional Polymer Materials, Max Bergmann Center of Biomaterials, Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany
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Qiu H, Qi P, Liu J, Yang Y, Tan X, Xiao Y, Maitz MF, Huang N, Yang Z. Biomimetic engineering endothelium-like coating on cardiovascular stent through heparin and nitric oxide-generating compound synergistic modification strategy. Biomaterials 2019; 207:10-22. [PMID: 30947118 DOI: 10.1016/j.biomaterials.2019.03.033] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 03/15/2019] [Accepted: 03/22/2019] [Indexed: 01/23/2023]
Abstract
Co-immobilization of two or more molecules with different and complementary functions to prevent thrombosis, suppress smooth muscle cell (SMC) proliferation, and support endothelial cell (EC) growth is generally considered to be promising for the re-endothelialization on cardiovascular stents. However, integration of molecules with distinct therapeutic effects does not necessarily result in synergistic physiological functions due to the lack of interactions among them, limiting their practical efficacy. Herein, we apply heparin and nitric oxide (NO), two key molecules of the physiological functions of endothelium, to develop an endothelium-mimetic coating. Such coating is achieved by sequential conjugation of heparin and the NO-generating compound selenocystamine (SeCA) on an amine-bearing film of plasma polymerized allylamine. The resulting surface combines the anti-coagulant (anti-FXa) function provided by the heparin and the anti-platelet activity of the catalytically produced NO. It also endows the stents with the ability to simultaneously up-regulate α-smooth muscle actin (α-SMA) expression and to increase cyclic guanylate monophosphate (cGMP) synthesis of SMC, thereby significantly promoting their contractile phenotype and suppressing their proliferation. Importantly, this endothelium-biomimetic coating creates a favorable microenvironment for EC over SMC. These features impressively improve the antithrombogenicity, re-endothelialization and anti-restenosis of vascular stents in vivo.
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Affiliation(s)
- Hua Qiu
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Pengkai Qi
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Jingxia Liu
- Physical Education Department, Southwest Jiaotong University, Chengdu, 610031, China
| | - Ying Yang
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China; Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, 4059, Australia
| | - Xing Tan
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Yu Xiao
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Manfred F Maitz
- Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research Dresden, Dresden, 01069, Germany
| | - Nan Huang
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
| | - Zhilu Yang
- Key Lab of Advanced Technology of Materials of Education Ministry, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
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25
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Ma L, Huang J, Zhu X, Zhu B, Wang L, Zhao W, Qiu L, Song B, Zhao C, Yan F. In vitro and in vivo anticoagulant activity of heparin-like biomacromolecules and the mechanism analysis for heparin-mimicking activity. Int J Biol Macromol 2019; 122:784-792. [PMID: 30399381 DOI: 10.1016/j.ijbiomac.2018.11.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 11/01/2018] [Accepted: 11/02/2018] [Indexed: 02/05/2023]
Abstract
Heparin-like biomacromolecules (HepLBm), exhibiting similar chemical structure and biological properties to heparin, can be obtained by modifying either synthetic biopolymers or natural biomacromolecules with physical or chemical methods. In this work, a low-cost and biocompatible sodium alginate was chosen as a model biomacromolecule to design anticoagulant HepLBm with a similar sulfation degree to heparin. FTIR, 1H NMR, and element analysis data were used to confirm the chemical structure of HepLBm. Hemolysis tests, clotting time, complement activation, and contact activation tests were carried out to determine the in vitro anticoagulant activity of HepLBm. In addition, systematic studies of blood cell count, coagulation function, and histopathology were performed to demonstrate the in vivo anticoagulant activity and toxicity of HepLBm with SD rat experiments. Furthermore, a series of linear molecules containing carboxyl groups, sulfonic groups, and hydroxyl groups were selected and their clotting time was tested to provide a mechanism analysis for the excellent anticoagulant activity of HepLBm. With the excellent in vitro/in vivo anticoagulant activity, good biocompatibility, and low cost, the HepLBm synthesized in this work would have great potential for substitution of heparin in many application fields, such as the surface modification of biomedical devices, extracorporeal anticoagulants, and other clinical fields.
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Affiliation(s)
- Lang Ma
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China; College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jianbo Huang
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiaoxia Zhu
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Bihui Zhu
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Liyun Wang
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Weifeng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Li Qiu
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Bin Song
- Department of Radiology, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Feng Yan
- Laboratory of Ultrasound Imaging Drug, Department of Ultrasound, West China School of Medicine/West China Hospital, Sichuan University, Chengdu 610041, China.
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26
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Li Q, Li J, Liao G, Xu Z. The preparation of heparin-like hyperbranched polyimides and their antithrombogenic, antibacterial applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:126. [PMID: 30056507 DOI: 10.1007/s10856-018-6137-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 07/20/2018] [Indexed: 06/08/2023]
Abstract
1,3,5-Tris(4-aminophenoxy) benzene (TAPOB) and 2,2-bis [4-(3,4-dicarboxyphenoxy) phenyl] propane dianhydride (BPADA) were used to synthesize an amino-terminated hyperbranched polyimide (AM-HBPI). Then, the 2-methacryloyloxyethyl phosphorylcholine-modified hyperbranched polyimide (HBPI-MPC) was obtained through the graft modification of MPC onto AM-HBPI by Michael addition. The infrared spectroscopy and X-ray photoelectron spectroscopy spectra showed MPC molecules were successfully grafted onto the HBPI molecules. The HBPI-MPC films exhibited slightly decreased thermal stabilities with 5% weight loss temperature in the range of of 418-483 °C in nitrogen, compared with the pure HBPI film. With the increase of MPC grafting amount, the static water contact angles decreased from average 84.0° of the pure HBPI film to average 45.0° of the HBPI-MPC film with 20% MPC. Meanwhile, the increased surface roughness of the HBPI-MPC films increased the contact areas with the platelets, enhancing their anticoagulant efficiency. The number of platelet adhesion declined and the shape of platelet changed from flat to round. The recalcification times grew from average 300 s of pure HBPI to average 551 s of the HBPI-MPC film with 20% MPC, indicating improved anticoagulant properties and biocompatibility. Bacterial adhesion test also demonstrated the number of bacterial adhesion was significantly reduced and antibacterial properties were improved. Thus, the HBPI-MPC films have great application prospects as biomedical anticoagulant materials.
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Affiliation(s)
- Qing Li
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, 530008, Nanning, Guangxi, China
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, 430062, Wuhan, Hubei, China
| | - Jing Li
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, 430062, Wuhan, Hubei, China
| | - Guangfu Liao
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-Sen University, 510275, Guangzhou, China
| | - Zushun Xu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, 430062, Wuhan, Hubei, China.
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