1
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Hong X, Luo AC, Doulamis I, Oh N, Im GB, Lin CY, del Nido PJ, Lin RZ, Melero-Martin JM. Photopolymerizable Hydrogel for Enhanced Intramyocardial Vascular Progenitor Cell Delivery and Post-Myocardial Infarction Healing. Adv Healthc Mater 2023; 12:e2301581. [PMID: 37611321 PMCID: PMC10840685 DOI: 10.1002/adhm.202301581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/08/2023] [Indexed: 08/25/2023]
Abstract
Cell transplantation success for myocardial infarction (MI) treatment is often hindered by low engraftment due to washout effects during myocardial contraction. A clinically viable biomaterial that enhances cell retention can optimize intramyocardial cell delivery. In this study, a therapeutic cell delivery method is developed for MI treatment utilizing a photocrosslinkable gelatin methacryloyl (GelMA) hydrogel. Human vascular progenitor cells, capable of forming functional vasculatures upon transplantation, are combined with an in situ photopolymerization approach and injected into the infarcted zones of mouse hearts. This strategy substantially improves acute cell retention and promotes long-term post-MI cardiac healing, including stabilized cardiac functions, preserved viable myocardium, and reduced cardiac fibrosis. Additionally, engrafted vascular cells polarize recruited bone marrow-derived neutrophils toward a non-inflammatory phenotype via transforming growth factor beta (TGFβ) signaling, fostering a pro-regenerative microenvironment. Neutrophil depletion negates the therapeutic benefits generated by cell delivery in ischemic hearts, highlighting the essential role of non-inflammatory, pro-regenerative neutrophils in cardiac remodeling. In conclusion, this GelMA hydrogel-based intramyocardial vascular cell delivery approach holds promise for enhancing the treatment of acute myocardial infarction.
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Affiliation(s)
- Xuechong Hong
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Allen Chilun Luo
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Ilias Doulamis
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Nicholas Oh
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Gwang-Bum Im
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Chun-Yen Lin
- Department of Lymphoma and Myeloma, The University of Texas, M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Pedro J. del Nido
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Ruei-Zeng Lin
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Juan M. Melero-Martin
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA
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2
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Rogatinsky J, Recco D, Feichtmeier J, Kang Y, Kneier N, Hammer P, O’Leary E, Mah D, Hoganson D, Vasilyev NV, Ranzani T. A multifunctional soft robot for cardiac interventions. SCIENCE ADVANCES 2023; 9:eadi5559. [PMID: 37878705 PMCID: PMC10599628 DOI: 10.1126/sciadv.adi5559] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 09/26/2023] [Indexed: 10/27/2023]
Abstract
In minimally invasive endovascular procedures, surgeons rely on catheters with low dexterity and high aspect ratios to reach an anatomical target. However, the environment inside the beating heart presents a combination of challenges unique to few anatomic locations, making it difficult for interventional tools to maneuver dexterously and apply substantial forces on an intracardiac target. We demonstrate a millimeter-scale soft robotic platform that can deploy and self-stabilize at the entrance to the heart, and guide existing interventional tools toward a target site. In two exemplar intracardiac procedures within the right atrium, the robotic platform provides enough dexterity to reach multiple anatomical targets, enough stability to maintain constant contact on motile targets, and enough mechanical leverage to generate newton-level forces. Because the device addresses ongoing challenges in minimally invasive intracardiac intervention, it may enable the further development of catheter-based interventions.
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Affiliation(s)
- Jacob Rogatinsky
- Department of Mechanical Engineering, Boston University, Boston, MA 02215, USA
| | - Dominic Recco
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
| | | | - Yuchen Kang
- Department of Mechanical Engineering, Boston University, Boston, MA 02215, USA
| | - Nicholas Kneier
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Peter Hammer
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Edward O’Leary
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Douglas Mah
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA
| | - David Hoganson
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Nikolay V. Vasilyev
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Tommaso Ranzani
- Department of Mechanical Engineering, Boston University, Boston, MA 02215, USA
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3
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Im GB, Lin RZ. Bioengineering for vascularization: Trends and directions of photocrosslinkable gelatin methacrylate hydrogels. Front Bioeng Biotechnol 2022; 10:1053491. [PMID: 36466323 PMCID: PMC9713639 DOI: 10.3389/fbioe.2022.1053491] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 11/03/2022] [Indexed: 10/17/2023] Open
Abstract
Gelatin methacrylate (GelMA) hydrogels have been widely used in various biomedical applications, especially in tissue engineering and regenerative medicine, for their excellent biocompatibility and biodegradability. GelMA crosslinks to form a hydrogel when exposed to light irradiation in the presence of photoinitiators. The mechanical characteristics of GelMA hydrogels are highly tunable by changing the crosslinking conditions, including the GelMA polymer concentration, degree of methacrylation, light wavelength and intensity, and light exposure time et al. In this regard, GelMA hydrogels can be adjusted to closely resemble the native extracellular matrix (ECM) properties for the specific functions of target tissues. Therefore, this review focuses on the applications of GelMA hydrogels for bioengineering human vascular networks in vitro and in vivo. Since most tissues require vasculature to provide nutrients and oxygen to individual cells, timely vascularization is critical to the success of tissue- and cell-based therapies. Recent research has demonstrated the robust formation of human vascular networks by embedding human vascular endothelial cells and perivascular mesenchymal cells in GelMA hydrogels. Vascular cell-laden GelMA hydrogels can be microfabricated using different methodologies and integrated with microfluidic devices to generate a vasculature-on-a-chip system for disease modeling or drug screening. Bioengineered vascular networks can also serve as build-in vasculature to ensure the adequate oxygenation of thick tissue-engineered constructs. Meanwhile, several reports used GelMA hydrogels as implantable materials to deliver therapeutic cells aiming to rebuild the vasculature in ischemic wounds for repairing tissue injuries. Here, we intend to reveal present work trends and provide new insights into the development of clinically relevant applications based on vascularized GelMA hydrogels.
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Affiliation(s)
- Gwang-Bum Im
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, United States
- Department of Surgery, Harvard Medical School, Boston, MA, United States
| | - Ruei-Zeng Lin
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, United States
- Department of Surgery, Harvard Medical School, Boston, MA, United States
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4
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Honig G, Larkin PB, Heller C, Hurtado-Lorenzo A. Research-Based Product Innovation to Address Critical Unmet Needs of Patients with Inflammatory Bowel Diseases. Inflamm Bowel Dis 2021; 27:S1-S16. [PMID: 34791292 PMCID: PMC8922161 DOI: 10.1093/ibd/izab230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Indexed: 12/09/2022]
Abstract
Despite progress in recent decades, patients with inflammatory bowel diseases face many critical unmet needs, demonstrating the limitations of available treatment options. Addressing these unmet needs will require interventions targeting multiple aspects of inflammatory bowel disease pathology, including disease drivers that are not targeted by available therapies. The vast majority of late-stage investigational therapies also focus primarily on a narrow range of fundamental mechanisms. Thus, there is a pressing need to advance to clinical stage differentiated investigational therapies directly targeting a broader range of key mechanistic drivers of inflammatory bowel diseases. In addition, innovations are critically needed to enable treatments to be tailored to the specific underlying abnormal biological pathways of patients; interventions with improved safety profiles; biomarkers to develop prognostic, predictive, and monitoring tests; novel devices for nonpharmacological approaches such as minimally invasive monitoring; and digital health technologies. To address these needs, the Crohn's & Colitis Foundation launched IBD Ventures, a venture philanthropy-funding mechanism, and IBD Innovate®, an innovative, product-focused scientific conference. This special IBD Innovate® supplement is a collection of articles reflecting the diverse and exciting research and development that is currently ongoing in the inflammatory bowel disease field to deliver innovative and differentiated products addressing critical unmet needs of patients. Here, we highlight the pipeline of new product opportunities currently advancing at the preclinical and early clinical development stages. We categorize and describe novel and differentiated potential product opportunities based on their potential to address the following critical unmet patient needs: (1) biomarkers for prognosis of disease course and prediction/monitoring of treatment response; (2) restoration of eubiosis; (3) restoration of barrier function and mucosal healing; (4) more effective and safer anti-inflammatories; (5) neuromodulatory and behavioral therapies; (6) management of disease complications; and (7) targeted drug delivery.
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5
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Yuk H, Wu J, Sarrafian TL, Mao X, Varela CE, Roche ET, Griffiths LG, Nabzdyk CS, Zhao X. Rapid and coagulation-independent haemostatic sealing by a paste inspired by barnacle glue. Nat Biomed Eng 2021; 5:1131-1142. [PMID: 34373600 PMCID: PMC9254891 DOI: 10.1038/s41551-021-00769-y] [Citation(s) in RCA: 127] [Impact Index Per Article: 42.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 06/22/2021] [Indexed: 02/07/2023]
Abstract
Tissue adhesives do not normally perform well on tissues that are covered with blood or other bodily fluids. Here we report the design, adhesion mechanism and performance of a paste that haemostatically seals tissues in less than 15 s, independently of the blood-coagulation rate. With a design inspired by barnacle glue (which strongly adheres to wet and contaminated surfaces owing to adhesive proteins embedded in a lipid-rich matrix), the paste consists of a blood-repelling hydrophobic oil matrix containing embedded microparticles that covalently crosslink with tissue surfaces on the application of gentle pressure. It slowly resorbs over weeks, sustains large pressures (approximately 350 mm Hg of burst pressure in a sealed porcine aorta), makes tough (interfacial toughness of 150-300 J m-2) and strong (shear and tensile strengths of, respectively, 40-70 kPa and 30-50 kPa) interfaces with blood-covered tissues, and outperforms commercial haemostatic agents in the sealing of bleeding porcine aortas ex vivo and of bleeding heart and liver tissues in live rats and pigs. The paste may aid the treatment of severe bleeding, even in individuals with coagulopathies.
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Affiliation(s)
- Hyunwoo Yuk
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA,Correspondence and requests for materials should be addressed to H.Y. (), C.S.N. (), and X.Z. ()
| | - Jingjing Wu
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Tiffany L. Sarrafian
- Division of Thoracic Surgery, Department of Surgery, Mayo Clinic, Rochester, MN, USA
| | - Xinyu Mao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Claudia E. Varela
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA,Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA, USA
| | - Ellen T. Roche
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA,Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA,Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA, USA
| | | | - Christoph S. Nabzdyk
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, MN, USA,Correspondence and requests for materials should be addressed to H.Y. (), C.S.N. (), and X.Z. ()
| | - Xuanhe Zhao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA,Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA,Correspondence and requests for materials should be addressed to H.Y. (), C.S.N. (), and X.Z. ()
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6
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Mencattelli M, Mondal A, Miale R, Van Story D, Peine J, Li Y, Artoni A, Kaza AK, Dupont PE. In Vivo Molding of Airway Stents. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2010525. [PMID: 34335133 PMCID: PMC8323946 DOI: 10.1002/adfm.202010525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Indexed: 06/13/2023]
Abstract
Like ready-to-wear clothing, medical devices come in a fixed set of sizes. While this may accommodate a large fraction of the patient population, others must either experience suboptimal results due to poor sizing or must do without the device. Although techniques have been proposed to fabricate patient-specific devices in advance of a procedure, this process is expensive and time consuming. An alternative solution that provides every patient with a tailored fit is to create devices that can be customized to the patient's anatomy as they are delivered. This paper reports an in vivo molding process in which a soft flexible photocurable stent is delivered into the trachea or bronchi over a UV-transparent balloon. The balloon is expanded such that the stent conforms to the varying cross-sectional shape of the airways. UV light is then delivered through the balloon curing the stent into its expanded conformal shape. The potential of this method is demonstrated using phantom, ex vivo and in vivo experiments. This approach can produce stents providing equivalent airway support to those made from standard materials while providing a customized fit.
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Affiliation(s)
- Margherita Mencattelli
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115 USA
| | - Abhijit Mondal
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115 USA
| | - Roberta Miale
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115 USA
| | - David Van Story
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115 USA; currently at Therapeutic Technology Design and Development Lab, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 USA
| | - Joseph Peine
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115 USA
| | - Yingtian Li
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115 USA; currently at Institute of Biomedical & Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China
| | - Alessio Artoni
- Dipartimento di Ingegneria Civile e Industriale, Universita di Pisa, Largo Lucio Lazzarino 2, 56122 Pisa, Italy
| | - Aditya K Kaza
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 USA
| | - Pierre E Dupont
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA 02115 USA
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7
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Mizuno HL, Anraku Y, Sakuma I, Akagi Y. Design of a photocleavable drug binding platform for a novel remotely controllable drug coated balloon. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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8
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Singh M, Varela CE, Whyte W, Horvath MA, Tan NCS, Ong CB, Liang P, Schermerhorn ML, Roche ET, Steele TWJ. Minimally invasive electroceutical catheter for endoluminal defect sealing. SCIENCE ADVANCES 2021; 7:eabf6855. [PMID: 33811080 PMCID: PMC11057783 DOI: 10.1126/sciadv.abf6855] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/16/2021] [Indexed: 06/12/2023]
Abstract
Surgical repair of lumen defects is associated with periprocedural morbidity and mortality. Endovascular repair with tissue adhesives may reduce host tissue damage, but current bioadhesive designs do not support minimally invasive deployment. Voltage-activated tissue adhesives offer a new strategy for endoluminal repair. To facilitate the clinical translation of voltage-activated adhesives, an electroceutical patch (ePATCH) paired with a minimally invasive catheter with retractable electrodes (CATRE) is challenged against the repair of in vivo and ex vivo lumen defects. The ePATCH/CATRE platform demonstrates the sealing of lumen defects up to 2 millimeters in diameter on wet tissue substrates. Water-tight seals are flexible and resilient, withstanding over 20,000 physiological relevant stress/strain cycles. No disruption to electrical signals was observed when the ePATCH was electrically activated on the beating heart. The ePATCH/CATRE platform has diverse potential applications ranging from endovascular treatment of pseudo-aneurysms/fistulas to bioelectrodes toward electrophysiological mapping.
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Affiliation(s)
- Manisha Singh
- NTU-Northwestern Institute for Nanomedicine (NNIN), Interdisciplinary Graduate School (IGS), Nanyang Technological University (NTU), 50 Nanyang Drive, Singapore 637553, Singapore
- School of Materials Science and Engineering (MSE), Nanyang Technological University (NTU), Singapore 639798, Singapore
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Claudia E Varela
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA
| | - William Whyte
- Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA
| | - Markus A Horvath
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Program in Health Sciences and Technology, Cambridge, MA 02139, USA
| | - Nigel C S Tan
- School of Materials Science and Engineering (MSE), Nanyang Technological University (NTU), Singapore 639798, Singapore
| | - Chee Bing Ong
- Histopathology/Advanced Molecular Pathology Lab, Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology, and Research, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Patric Liang
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
| | - Marc L Schermerhorn
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
| | - Ellen T Roche
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Terry W J Steele
- NTU-Northwestern Institute for Nanomedicine (NNIN), Interdisciplinary Graduate School (IGS), Nanyang Technological University (NTU), 50 Nanyang Drive, Singapore 637553, Singapore.
- School of Materials Science and Engineering (MSE), Nanyang Technological University (NTU), Singapore 639798, Singapore
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9
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Roche ET. Catheters gain arrays of sensors and actuators. Nat Biomed Eng 2020; 4:939-940. [PMID: 33093667 DOI: 10.1038/s41551-020-00636-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ellen T Roche
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA. .,Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
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10
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Han M, Chen L, Aras K, Liang C, Chen X, Zhao H, Li K, Faye NR, Sun B, Kim JH, Bai W, Yang Q, Ma Y, Lu W, Song E, Baek JM, Lee Y, Liu C, Model JB, Yang G, Ghaffari R, Huang Y, Efimov IR, Rogers JA. Catheter-integrated soft multilayer electronic arrays for multiplexed sensing and actuation during cardiac surgery. Nat Biomed Eng 2020; 4:997-1009. [PMID: 32895515 DOI: 10.1038/s41551-020-00604-w] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 07/17/2020] [Indexed: 01/02/2023]
Abstract
The rigidity and relatively primitive modes of operation of catheters equipped with sensing or actuation elements impede their conformal contact with soft-tissue surfaces, limit the scope of their uses, lengthen surgical times and increase the need for advanced surgical skills. Here, we report materials, device designs and fabrication approaches for integrating advanced electronic functionality with catheters for minimally invasive forms of cardiac surgery. By using multiphysics modelling, plastic heart models and Langendorff animal and human hearts, we show that soft electronic arrays in multilayer configurations on endocardial balloon catheters can establish conformal contact with curved tissue surfaces, support high-density spatiotemporal mapping of temperature, pressure and electrophysiological parameters and allow for programmable electrical stimulation, radiofrequency ablation and irreversible electroporation. Integrating multimodal and multiplexing capabilities into minimally invasive surgical instruments may improve surgical performance and patient outcomes.
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Affiliation(s)
- Mengdi Han
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Lin Chen
- Departments of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.,State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Kedar Aras
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Cunman Liang
- Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Xuexian Chen
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Hangbo Zhao
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, USA
| | - Kan Li
- Departments of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA.,Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA.,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.,Department of Engineering, University of Cambridge, Cambridge, UK
| | - Ndeye Rokhaya Faye
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA
| | - Bohan Sun
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Jae-Hwan Kim
- Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign Urbana, Champaign, IL, USA.,Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign Urbana, Champaign, IL, USA
| | - Wubin Bai
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Quansan Yang
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA
| | - Yuhang Ma
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Wei Lu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Enming Song
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Janice Mihyun Baek
- Department of Chemistry, University of Illinois at Urbana-Champaign Urbana, Champaign, IL, USA
| | - Yujin Lee
- Department of Chemistry, University of Illinois at Urbana-Champaign Urbana, Champaign, IL, USA
| | - Clifford Liu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Jeffrey B Model
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA
| | - Guanjun Yang
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Roozbeh Ghaffari
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA.,Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA
| | - Yonggang Huang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA. .,Departments of Civil and Environmental Engineering, Northwestern University, Evanston, IL, USA. .,Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA. .,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
| | - Igor R Efimov
- Department of Biomedical Engineering, The George Washington University, Washington, DC, USA.
| | - John A Rogers
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, USA. .,Department of Mechanical Engineering, Northwestern University, Evanston, IL, USA. .,Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA. .,Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign Urbana, Champaign, IL, USA. .,Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA. .,Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA. .,Department of Chemistry, Northwestern University, Evanston, IL, USA. .,Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, IL, USA.
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11
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Wang C, Wang S, Pan H, Min L, Zheng H, Zhu H, Liu G, Yang W, Chen X, Hou X. Bioinspired liquid gating membrane-based catheter with anticoagulation and positionally drug release properties. SCIENCE ADVANCES 2020; 6:eabb4700. [PMID: 32917618 PMCID: PMC7473668 DOI: 10.1126/sciadv.abb4700] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 07/21/2020] [Indexed: 05/11/2023]
Abstract
Catheters are indispensable medical devices that are extensively used in daily medical treatment. However, existing catheter materials continue to encounter many problems, such as thrombosis, single functionality, and inadaptability to environmental changes. Inspired by blood vessels, we develop a self-adaptive liquid gating membrane-based catheter with anticoagulation and positionally drug release properties. Our multifunctional liquid gating membrane-based catheter significantly attenuates blood clot formation and can be used as a general catheter design strategy to offer various drugs positionally releasing applications to comprehensively enhance the safety, functionality, and performance of medical catheters' materials.
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Affiliation(s)
- Chunyan Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
| | - Shuli Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
| | - Hong Pan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Lingli Min
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
| | - Huili Zheng
- Zhongshan Hospital, Xiamen University, Xiamen 361004, China
| | - Huang Zhu
- School of Materials Science and Engineering, Sichuan University, Chengdu 610064, China
| | - Gang Liu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China
| | - Weizhong Yang
- School of Materials Science and Engineering, Sichuan University, Chengdu 610064, China.
| | - Xinyu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xu Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
- Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
- Research Institute for Soft Matter and Biomimetics, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
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12
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Raman R, Hua T, Gwynne D, Collins J, Tamang S, Zhou J, Esfandiary T, Soares V, Pajovic S, Hayward A, Langer R, Traverso G. Light-degradable hydrogels as dynamic triggers for gastrointestinal applications. SCIENCE ADVANCES 2020; 6:eaay0065. [PMID: 32010768 PMCID: PMC6968934 DOI: 10.1126/sciadv.aay0065] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Accepted: 11/14/2019] [Indexed: 05/21/2023]
Abstract
Triggerable materials capable of being degraded by selective stimuli stand to transform our capacity to precisely control biomedical device activity and performance while reducing the need for invasive interventions. Here, we describe the development of a modular and tunable light-triggerable hydrogel system capable of interfacing with implantable devices. We apply these materials to two applications in the gastrointestinal (GI) tract: a bariatric balloon and an esophageal stent. We demonstrate biocompatibility and on-demand triggering of the material in vitro, ex vivo, and in vivo. Moreover, we characterize performance of the system in a porcine large animal model with an accompanying ingestible LED. Light-triggerable hydrogels have the potential to be applied broadly throughout the GI tract and other anatomic areas. By demonstrating the first use of light-degradable hydrogels in vivo, we provide biomedical engineers and clinicians with a previously unavailable, safe, dynamically deliverable, and precise tool to design dynamically actuated implantable devices.
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Affiliation(s)
- Ritu Raman
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Tiffany Hua
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Declan Gwynne
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Joy Collins
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Siddartha Tamang
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jianlin Zhou
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Tina Esfandiary
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Vance Soares
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Simo Pajovic
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alison Hayward
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Giovanni Traverso
- The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
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13
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Pellenc Q, Touma J, Coscas R, Edorh G, Pereira M, Karp J, Castier Y, Desgranges P, Alsac JM. Preclinical and clinical evaluation of a novel synthetic bioresorbable, on-demand, light-activated sealant in vascular reconstruction. THE JOURNAL OF CARDIOVASCULAR SURGERY 2019; 60:599-611. [DOI: 10.23736/s0021-9509.19.10783-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Hsiao JH, Chang JY(J, Cheng CM. Soft medical robotics: clinical and biomedical applications, challenges, and future directions. Adv Robot 2019. [DOI: 10.1080/01691864.2019.1679251] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jen-Hsuan Hsiao
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Jen-Yuan (James) Chang
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Chao-Min Cheng
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu, Taiwan
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15
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Costa RR, Soares da Costa D, Reis RL, Pashkuleva I. Bioinspired baroplastic glycosaminoglycan sealants for soft tissues. Acta Biomater 2019; 87:108-117. [PMID: 30665018 DOI: 10.1016/j.actbio.2019.01.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/17/2019] [Accepted: 01/17/2019] [Indexed: 12/19/2022]
Abstract
We describe biomimetic adhesives inspired by the marine glues fabricated by the sandcastle worm. The formation of stable polyelectrolyte complexes between poly-L-lysine (PLL) and glycosaminoglycans (GAGs) with different sulfation degree - heparin (HEP), chondroitin sulfate (CS) and hyaluronic acid (HA) - is optimized by zeta-potential titrations. These PLL/GAG complexes are transformed into compact polyelectrolyte complexes (coPECs) with controlled water contents and densities via baroplastic processing. Rotational shear tests demonstrate that coPECs containing sulfated GAGs (HEP or CS) have solid-like properties, whereas HA-based complexes form highly hydrated viscous-like networks. The adhesiveness of the generated coPECs (normalized lap shear strength) is tested in dry and wet states using polystyrene and rabbit skin, respectively. In dry state, the adhesives exhibit lap shear strengths in the order of hundreds of kPa, with coPLL/HEP and coPLL/CS being about 1.5 times stronger than coPLL/HA. In wet state, all coPECs seal rabbit skin and recover over 60% of the elongation capacity of intact skin with coPLL/HA providing the sturdiest adhesion (∼85% elongation recovery). We demonstrate that this is due to the higher water fraction that improves the bonding between the wet specimens, showcasing the potential superior mechanical recovery on injured tissues. STATEMENT OF SIGNIFICANCE: The development of medical sealants with sufficient adhesive strength in the presence of water and moist remains a huge challenge. We present glycosaminoglycans (GAGs) as biomaterials for the assembly of baroplastics with strong adhesive strength to soft tissues at physiological conditions. Baroplastics with tacky properties were generated by a mild assembly process based on polyelectrolyte complexation and compaction. These materials behave as versatile sealants: their adhesiveness can be adjusted to either dry or wet specimens because of the different sulfation degree of GAGs. These sealants were noncytotoxic towards L929 cells and allowed the damaged skin to recover a great deal of its native elasticity: they preserved the J-shaped stress/strain mechanical response that is typical of biological soft tissues.
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Affiliation(s)
- Rui R Costa
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's, PT Government Associated Laboratory, Braga/Guimarães, Portugal.
| | - Diana Soares da Costa
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's, PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's, PT Government Associated Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, 4805-017 Barco, Guimarães, Portugal
| | - Iva Pashkuleva
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal; ICVS/3B's, PT Government Associated Laboratory, Braga/Guimarães, Portugal.
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16
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Difunctional vinyl sulfonate esters for the fabrication of tough methacrylate-based photopolymer networks. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Peer G, Dorfinger P, Koch T, Stampfl J, Gorsche C, Liska R. Photopolymerization of Cyclopolymerizable Monomers and Their Application in Hot Lithography. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01991] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Gernot Peer
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/163 MC, 1060 Vienna, Austria
| | - Peter Dorfinger
- Institute of Materials Science and Technology, Technische Universität Wien, Getreidemarkt 9/308, 1060 Vienna, Austria
| | - Thomas Koch
- Institute of Materials Science and Technology, Technische Universität Wien, Getreidemarkt 9/308, 1060 Vienna, Austria
| | - Jürgen Stampfl
- Institute of Materials Science and Technology, Technische Universität Wien, Getreidemarkt 9/308, 1060 Vienna, Austria
- Cubicure GmbH, Photopolymer Development, Gutheil-Schoder-Gasse 17, 1230 Vienna, Austria
| | - Christian Gorsche
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/163 MC, 1060 Vienna, Austria
| | - Robert Liska
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/163 MC, 1060 Vienna, Austria
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18
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Roche ET, Horvath MA, Wamala I, Alazmani A, Song SE, Whyte W, Machaidze Z, Payne CJ, Weaver JC, Fishbein G, Kuebler J, Vasilyev NV, Mooney DJ, Pigula FA, Walsh CJ. Soft robotic sleeve supports heart function. Sci Transl Med 2018; 9:9/373/eaaf3925. [PMID: 28100834 DOI: 10.1126/scitranslmed.aaf3925] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 12/23/2016] [Indexed: 12/19/2022]
Abstract
There is much interest in form-fitting, low-modulus, implantable devices or soft robots that can mimic or assist in complex biological functions such as the contraction of heart muscle. We present a soft robotic sleeve that is implanted around the heart and actively compresses and twists to act as a cardiac ventricular assist device. The sleeve does not contact blood, obviating the need for anticoagulation therapy or blood thinners, and reduces complications with current ventricular assist devices, such as clotting and infection. Our approach used a biologically inspired design to orient individual contracting elements or actuators in a layered helical and circumferential fashion, mimicking the orientation of the outer two muscle layers of the mammalian heart. The resulting implantable soft robot mimicked the form and function of the native heart, with a stiffness value of the same order of magnitude as that of the heart tissue. We demonstrated feasibility of this soft sleeve device for supporting heart function in a porcine model of acute heart failure. The soft robotic sleeve can be customized to patient-specific needs and may have the potential to act as a bridge to transplant for patients with heart failure.
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Affiliation(s)
- Ellen T Roche
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA.,Discipline of Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland
| | - Markus A Horvath
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA.,Technische Universität München, Boltzmannstraße 15, 85748 Garching, Germany
| | - Isaac Wamala
- Department of Cardiac Surgery, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Ali Alazmani
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA.,Department of Cardiac Surgery, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA.,School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, U.K
| | - Sang-Eun Song
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA.,Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA
| | - William Whyte
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA.,Advanced Materials and Bioengineering Research Centre, Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Zurab Machaidze
- Department of Cardiac Surgery, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Christopher J Payne
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA
| | - James C Weaver
- Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA
| | - Gregory Fishbein
- Department of Anatomic and Clinical Pathology, Ronald Reagan UCLA (University of California, Los Angeles) Medical Center, Los Angeles, CA 90095, USA
| | - Joseph Kuebler
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Nikolay V Vasilyev
- Department of Cardiac Surgery, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA
| | - David J Mooney
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA.,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA
| | - Frank A Pigula
- Department of Cardiac Surgery, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA. .,Cardiovascular Surgery, School of Medicine, University of Louisville, Louisville, KY 40202, USA
| | - Conor J Walsh
- School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138, USA. .,Wyss Institute for Biologically Inspired Engineering, 3 Blackfan Circle, Longwood, Boston, MA 02115, USA
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19
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Tissue Engineered Solutions for Intracardiac Septal Defects: A Large Step Forward in an Unmet Clinical Need. Ann Surg 2017; 265:e11-e12. [PMID: 27811507 DOI: 10.1097/sla.0000000000002060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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20
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Smith CR. Tissue adhesive innovations derived from the natural world. J Thorac Cardiovasc Surg 2017; 155:278-279. [PMID: 29129425 DOI: 10.1016/j.jtcvs.2017.09.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 09/02/2017] [Indexed: 01/02/2023]
Affiliation(s)
- Craig R Smith
- Department of Surgery, College of Physicians & Surgeons of Columbia University, Columbia University Medical Center of New York Presbyterian Hospital, New York, NY.
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21
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Steindl J, Koch T, Moszner N, Gorsche C. Silane-Acrylate Chemistry for Regulating Network Formation in Radical Photopolymerization. Macromolecules 2017; 50:7448-7457. [PMID: 29033466 PMCID: PMC5637009 DOI: 10.1021/acs.macromol.7b01399] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/23/2017] [Indexed: 12/27/2022]
Abstract
Photoinitiated silane-ene chemistry has the potential to pave the way toward spatially resolved organosilicon compounds, which might find application in biomedicine, microelectronics, and other advanced fields. Moreover, this approach could serve as a viable alternative to the popular photoinitiated thiol-ene chemistry, which gives access to defined and functional photopolymer networks. A difunctional bis(trimethylsilyl)silane with abstractable hydrogens (DSiH) was successfully synthesized in a simple one-pot procedure. The radical reactivity of DSiH with various homopolymerizable monomers (i.e., (meth)acrylate, vinyl ester, acrylamide) was assessed via 1H NMR spectroscopic studies. DSiH shows good reactivity with acrylates and vinyl esters. The most promising silane-acrylate system was further investigated in cross-linking formulations toward its reactivity (e.g., heat of polymerization, curing time, occurrence of gelation, double-bond conversion) and compared to state-of-the-art thiol-acrylate resins. The storage stability of prepared resin formulations is greatly improved for silane-acrylate systems vs thiol-ene resins. Double-bond conversion at the gel point (DBCgel) and overall DBC were increased, and polymerization-induced shrinkage stress has been significantly reduced with the introduction of silane-acrylate chemistry. Resulting photopolymer networks exhibit a homogeneous network architecture (indicated by a narrow glass transition) that can be tuned by varying silane concentration, and this confirms the postulated regulation of radical network formation. Similar to thiol-acrylate networks, this leads to more flexible photopolymer networks with increased elongation at break and improved impact resistance. Additionally, swelling tests indicate a high gel fraction for silane-acrylate photopolymers.
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Affiliation(s)
- Johannes Steindl
- Institute
of Applied Synthetic Chemistry, Technische
Universität Wien, Getreidemarkt 9/163 MC, 1060 Vienna, Austria
- Christian-Doppler-Laboratory
for Photopolymers in Digital and Restorative Dentistry, Getreidemarkt 9, 1060 Vienna, Austria
| | - Thomas Koch
- Institute
of Materials Science and Technology, Technische
Universität Wien, Getreidemarkt 9/308, 1060 Vienna, Austria
| | - Norbert Moszner
- Christian-Doppler-Laboratory
for Photopolymers in Digital and Restorative Dentistry, Getreidemarkt 9, 1060 Vienna, Austria
- Ivoclar Vivadent
AG, 9494 Schaan, Liechtenstein
| | - Christian Gorsche
- Institute
of Applied Synthetic Chemistry, Technische
Universität Wien, Getreidemarkt 9/163 MC, 1060 Vienna, Austria
- Christian-Doppler-Laboratory
for Photopolymers in Digital and Restorative Dentistry, Getreidemarkt 9, 1060 Vienna, Austria
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22
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Adams MS, Salgaonkar VA, Scott SJ, Sommer G, Diederich CJ. Integration of deployable fluid lenses and reflectors with endoluminal therapeutic ultrasound applicators: Preliminary investigations of enhanced penetration depth and focal gain. Med Phys 2017; 44:5339-5356. [PMID: 28681404 DOI: 10.1002/mp.12458] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 06/19/2017] [Accepted: 07/02/2017] [Indexed: 02/06/2023] Open
Abstract
PURPOSE Catheter-based ultrasound applicators can generate thermal ablation of tissues adjacent to body lumens, but have limited focusing and penetration capabilities due to the small profile of integrated transducers required for the applicator to traverse anatomical passages. This study investigates a design for an endoluminal or laparoscopic ultrasound applicator with deployable acoustic reflector and fluid lens components, which can be expanded after device delivery to increase the effective acoustic aperture and allow for deeper and dynamically adjustable target depths. Acoustic and biothermal theoretical studies, along with benchtop proof-of-concept measurements, were performed to investigate the proposed design. METHODS The design schema consists of an array of tubular transducer(s) situated at the end of a catheter assembly, surrounded by an expandable water-filled conical balloon with a secondary reflective compartment that redirects acoustic energy distally through a plano-convex fluid lens. By controlling the lens fluid volume, the convex surface can be altered to adjust the focal length or collapsed for device insertion or removal. Acoustic output of the expanded applicator assembly was modeled using the rectangular radiator method and secondary sources, accounting for reflection and refraction at interfaces. Parametric studies of transducer radius (1-5 mm), height (3-25 mm), frequency (1.5-3 MHz), expanded balloon diameter (10-50 mm), lens focal length (10-100 mm), lens fluid (silicone oil, perfluorocarbon), and tissue attenuation (0-10 Np/m/MHz) on beam distributions and focal gain were performed. A proof-of-concept applicator assembly was fabricated and characterized using hydrophone-based intensity profile measurements. Biothermal simulations of endoluminal ablation in liver and pancreatic tissue were performed for target depths between 2 and 10 cm. RESULTS Simulations indicate that focal gain and penetration depth scale with the expanded reflector-lens balloon diameter, with greater achievable performance using perfluorocarbon lens fluid. Simulations of a 50 mm balloon OD, 10 mm transducer outer diameter (OD), 1.5 MHz assembly in water resulted in maximum intensity gain of ~170 (focal dimensions: ~12 mm length × 1.4 mm width) at ~5 cm focal depth and focal gains above 100 between 24 and 84 mm depths. A smaller (10 mm balloon OD, 4 mm transducer OD, 1.5 MHz) configuration produced a maximum gain of 6 at 9 mm depth. Compared to a conventional applicator with a fixed spherically focused transducer of 12 mm diameter, focal gain was enhanced at depths beyond 20 mm for assembly configurations with balloon diameters ≥ 20 mm. Hydrophone characterizations of the experimental assembly (31 mm reflector/lens diameter, 4.75 mm transducer radius, 1.7 MHz) illustrated focusing at variable depths between 10-70 mm with a maximum gain of ~60 and demonstrated agreement with theoretical simulations. Biothermal simulations (30 s sonication, 75 °C maximum) indicate that investigated applicator assembly configurations, at 30 mm and 50 mm balloon diameters, could create localized ellipsoidal thermal lesions increasing in size from 10 to 55 mm length × 3-6 mm width in liver tissue as target depth increased from 2 to 10 cm. CONCLUSIONS Preliminary theoretical and experimental analysis demonstrates that combining endoluminal ultrasound with an expandable acoustic reflector and fluid lens assembly can significantly enhance acoustic focal gain and penetration from inherently smaller diameter catheter-based applicators.
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Affiliation(s)
- Matthew S Adams
- Thermal Therapy Research Group, University of California San Francisco, 2340 Sutter Street, S341, San Francisco, CA, 94115, USA.,University of California, Berkeley - University of California, San Francisco Graduate Program in Bioengineering, University of California, CA, USA
| | - Vasant A Salgaonkar
- Thermal Therapy Research Group, University of California San Francisco, 2340 Sutter Street, S341, San Francisco, CA, 94115, USA
| | - Serena J Scott
- Thermal Therapy Research Group, University of California San Francisco, 2340 Sutter Street, S341, San Francisco, CA, 94115, USA
| | - Graham Sommer
- Department of Radiology, Stanford University, Stanford, CA, 94305, USA
| | - Chris J Diederich
- Thermal Therapy Research Group, University of California San Francisco, 2340 Sutter Street, S341, San Francisco, CA, 94115, USA.,University of California, Berkeley - University of California, San Francisco Graduate Program in Bioengineering, University of California, CA, USA
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23
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Design and control of a 3-chambered fiber reinforced soft actuator with off-the-shelf stretch sensors. INTERNATIONAL JOURNAL OF INTELLIGENT ROBOTICS AND APPLICATIONS 2017. [DOI: 10.1007/s41315-017-0020-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Green JJ, Elisseeff JH. Mimicking biological functionality with polymers for biomedical applications. Nature 2017; 540:386-394. [PMID: 27974772 DOI: 10.1038/nature21005] [Citation(s) in RCA: 293] [Impact Index Per Article: 41.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 09/12/2016] [Indexed: 12/12/2022]
Abstract
The vast opportunities for biomaterials design and functionality enabled by mimicking nature continue to stretch the limits of imagination. As both biological understanding and engineering capabilities develop, more sophisticated biomedical materials can be synthesized that have multifaceted chemical, biological and physical characteristics designed to achieve specific therapeutic goals. Mimicry is being used in the design of polymers for biomedical applications that are required locally in tissues, systemically throughout the body, and at the interface with tissues.
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Affiliation(s)
- Jordan J Green
- Translational Tissue Engineering Center, Departments of Biomedical Engineering and Ophthalmology, and the Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Jennifer H Elisseeff
- Translational Tissue Engineering Center, Departments of Biomedical Engineering and Ophthalmology, and the Bloomberg-Kimmel Institute for Cancer Immunotherapy, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
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25
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Patel DK, Sakhaei AH, Layani M, Zhang B, Ge Q, Magdassi S. Highly Stretchable and UV Curable Elastomers for Digital Light Processing Based 3D Printing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 28169466 DOI: 10.1002/adma.201606000] [Citation(s) in RCA: 221] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/30/2016] [Indexed: 05/02/2023]
Abstract
Stretchable UV-curable (SUV) elastomers can be stretched by up to 1100% and are suitable for digital-light-processing (DLP)-based 3D-printing technology. DLP printing of these SUV elastomers enables the direct creation of highly deformable complex 3D hollow structures such as balloons, soft actuators, grippers, and buckyball electronical switches.
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Affiliation(s)
- Dinesh K Patel
- Casali Center for Applied Chemistry, Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Amir Hosein Sakhaei
- Digital Manufacturing and Design Center, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Michael Layani
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Biao Zhang
- Digital Manufacturing and Design Center, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Qi Ge
- Digital Manufacturing and Design Center, Singapore University of Technology and Design, Singapore, 487372, Singapore
- Science and Math Cluster, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Shlomo Magdassi
- Casali Center for Applied Chemistry, Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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26
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Steindl J, Svirkova A, Marchetti-Deschmann M, Moszner N, Gorsche C. Light-Triggered Radical Silane-Ene Chemistry Using a Monosubstituted Bis(trimethylsilyl)silane. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600563] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Johannes Steindl
- Institute of Applied Synthetic Chemistry and Christian-Doppler-Laboratory for Photopolymers in Digital and Restorative Dentistry; Technische Universität Wien; Getreidemarkt 9/163 MC 1060 Vienna Austria
| | - Anastasiya Svirkova
- Institute of Chemical Technology and Analytics; Technische Universität Wien; Getreidemarkt 9/164 1060 Vienna Austria
| | - Martina Marchetti-Deschmann
- Institute of Chemical Technology and Analytics; Technische Universität Wien; Getreidemarkt 9/164 1060 Vienna Austria
| | - Norbert Moszner
- Ivoclar Vivadent AG; Bendererstrasse 2 9494 Schaan Liechtenstein
| | - Christian Gorsche
- Institute of Applied Synthetic Chemistry and Christian-Doppler-Laboratory for Photopolymers in Digital and Restorative Dentistry; Technische Universität Wien; Getreidemarkt 9/163 MC 1060 Vienna Austria
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27
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Abstract
Light and optical techniques have made profound impacts on modern
medicine, with numerous lasers and optical devices being currently used in
clinical practice to assess health and treat disease. Recent advances in
biomedical optics have enabled increasingly sophisticated technologies —
in particular those that integrate photonics with nanotechnology, biomaterials
and genetic engineering. In this Review, we revisit the fundamentals of
light–matter interactions, describe the applications of light in
imaging, diagnosis, therapy and surgery, overview their clinical use, and
discuss the promise of emerging light-based technologies.
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Affiliation(s)
- Seok Hyun Yun
- Wellman Center for Photomedicine, Massachusetts General Hospital, 65 Landsdowne Street, Cambridge, MA 02139, USA.,Department of Dermatology, Harvard Medical School, 25 Shattuck Street, Boston, MA 02115.,Harvard-MIT Health Sciences and Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Sheldon J J Kwok
- Wellman Center for Photomedicine, Massachusetts General Hospital, 65 Landsdowne Street, Cambridge, MA 02139, USA.,Harvard-MIT Health Sciences and Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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