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A microfluidic device for real-time on-demand intravenous oxygen delivery. Proc Natl Acad Sci U S A 2022; 119:e2115276119. [PMID: 35312360 PMCID: PMC9060478 DOI: 10.1073/pnas.2115276119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The treatment of hypoxemia that is refractory to the current standard of care is time-sensitive and requires skilled caregivers and use of specialized equipment (e.g., extracorporeal membrane oxygenation). Most patients experiencing refractory hypoxemia will suffer organ dysfunction, and death is common in this cohort. Here, we describe a new strategy to stabilize and support patients using a microfluidic device that administers oxygen gas directly to the bloodstream in real time and on demand using a process that we call sequential shear-induced bubble breakup. If successful, the described technology may help to avoid or decrease the incidence of ventilator-related lung injury from refractory hypoxemia. Oxygen is picked up in the lungs, carried by the blood, and delivered to tissues where it serves as the terminal electron acceptor during oxidative phosphorylation. During health, oxygen is available in abundance; however, COVID-19 and many other forms of critical illness can damage the lungs and compromise systemic oxygen delivery. Cells that are very active cannot tolerate deficiencies in energy production that result from oxygen deprivation. Hypoxemia that lasts even a few minutes can turn a healthy person into a neurologically devastated patient for life, and when refractory it is often lethal. In this paper, we develop a way to administer oxygen gas to a patient through an intravenous line, replacing or supplementing the function of injured lungs. Here, we show that by coinfusing oxygen gas and a liquid solution through a series of sequential nozzles of decreasing size we are able to create bubbles of oxygen that are smaller than a single red blood cell on demand and in real time. These bubbles are coated with a “membrane” similar to that in every other cell in the body, which 1) prevents them from merging with other bubbles to create larger ones, 2) provides a path for oxygen to diffuse out and into the blood, and 3) minimizes the likelihood of material-related toxicities. Importantly, these devices allow us to control the dosage of oxygen delivered and the volume of fluid administered, both of which are critical parameters in the management of critically ill patients.
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Charbe NB, Castillo F, Tambuwala MM, Prasher P, Chellappan DK, Carreño A, Satija S, Singh SK, Gulati M, Dua K, González-Aramundiz JV, Zacconi FC. A new era in oxygen therapeutics? From perfluorocarbon systems to haemoglobin-based oxygen carriers. Blood Rev 2022; 54:100927. [PMID: 35094845 DOI: 10.1016/j.blre.2022.100927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 12/14/2021] [Accepted: 01/12/2022] [Indexed: 02/09/2023]
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Lock AT, Seekell RP, Vutha A, Kheir JN, Polizzotti BD. Using design of experiments to understand and predict polymer microcapsule
core‐shell
architecture. J Appl Polym Sci 2021. [DOI: 10.1002/app.50100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Andrew T. Lock
- Heart Center's Translational Research Laboratory, Department of Cardiology Boston Children's Hospital Boston Massachusetts USA
| | - Raymond P. Seekell
- Heart Center's Translational Research Laboratory, Department of Cardiology Boston Children's Hospital Boston Massachusetts USA
- Department of Pediatrics Harvard Medical School Boston Massachusetts USA
| | - Ashwin Vutha
- Heart Center's Translational Research Laboratory, Department of Cardiology Boston Children's Hospital Boston Massachusetts USA
- Department of Pediatrics Harvard Medical School Boston Massachusetts USA
| | - John N. Kheir
- Heart Center's Translational Research Laboratory, Department of Cardiology Boston Children's Hospital Boston Massachusetts USA
- Department of Pediatrics Harvard Medical School Boston Massachusetts USA
| | - Brian D. Polizzotti
- Heart Center's Translational Research Laboratory, Department of Cardiology Boston Children's Hospital Boston Massachusetts USA
- Department of Pediatrics Harvard Medical School Boston Massachusetts USA
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4
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Willemen NGA, Hassan S, Gurian M, Li J, Allijn IE, Shin SR, Leijten J. Oxygen-Releasing Biomaterials: Current Challenges and Future Applications. Trends Biotechnol 2021; 39:1144-1159. [PMID: 33602609 DOI: 10.1016/j.tibtech.2021.01.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 12/22/2022]
Abstract
Oxygen is essential for the survival, function, and fate of mammalian cells. Oxygen tension controls cellular behaviour via metabolic programming, which in turn controls tissue regeneration, stem cell differentiation, drug metabolism, and numerous pathologies. Thus, oxygen-releasing biomaterials represent a novel and unique strategy to gain control over a variety of in vivo processes. Consequently, numerous oxygen-generating or carrying materials have been developed in recent years, which offer innovative solutions in the field of drug efficiency, regenerative medicine, and engineered living systems. In this review, we discuss the latest trends, highlight current challenges and solutions, and provide a future perspective on the field of oxygen-releasing materials.
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Affiliation(s)
- Niels G A Willemen
- Department of Developmental BioEngineering, Faculty of Science and Technology, Technical Medical Centre, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands; Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, and Brigham and Women's Hospital, Cambridge, MA 02139, USA
| | - Shabir Hassan
- Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, and Brigham and Women's Hospital, Cambridge, MA 02139, USA
| | - Melvin Gurian
- Department of Developmental BioEngineering, Faculty of Science and Technology, Technical Medical Centre, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Jinghang Li
- Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, and Brigham and Women's Hospital, Cambridge, MA 02139, USA; School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Iris E Allijn
- Department of Developmental BioEngineering, Faculty of Science and Technology, Technical Medical Centre, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands
| | - Su Ryon Shin
- Division of Engineering in Medicine, Department of Medicine, Harvard Medical School, and Brigham and Women's Hospital, Cambridge, MA 02139, USA.
| | - Jeroen Leijten
- Department of Developmental BioEngineering, Faculty of Science and Technology, Technical Medical Centre, University of Twente, Drienerlolaan 5, 7522 NB, Enschede, The Netherlands.
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5
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Nguyen T, Peng Y, Seekell RP, Kheir JN, Polizzotti BD. Hyperbaric polymer microcapsules for tunable oxygen delivery. J Control Release 2020; 327:420-428. [PMID: 32798637 DOI: 10.1016/j.jconrel.2020.08.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 07/20/2020] [Accepted: 08/03/2020] [Indexed: 01/23/2023]
Abstract
Over the past decade, there have been many attempts to engineer systems capable of delivering oxygen to overcome the effects of both systemic and local hypoxia that occurs as a result of traumatic injury, cell transplantation, or tumor growth, among many others. Despite progress in this field, which has led to a new class of oxygen-generating biomaterials, most reported techniques lack the tunability necessary for independent control over the oxygen flux (volume per unit time) and the duration of delivery, both of which are key parameters for overcoming tissue hypoxia of varying etiologies. Here, we show that these critical parameters can be effectively manipulated using hyperbarically-loaded polymeric microcapsules (PMC). PMCs are micron-sized particles with hollow cores and polymeric shells. We show that oxygen delivery through PMCs is dependent on its permeability through the polymeric shell, the shell thickness, and the pressure gradient across the shell. We also demonstrate that incorporating an intermediate oil layer between the polymeric shell and the gas core prevents rapid outgassing by effectively lowering the resultant pressure gradient across the polymeric membrane following depressurization.
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Affiliation(s)
- Tien Nguyen
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Yifeng Peng
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Raymond P Seekell
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - John N Kheir
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Brian D Polizzotti
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
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Kupikowska-Stobba B, Lewińska D. Polymer microcapsules and microbeads as cell carriers for in vivo biomedical applications. Biomater Sci 2020; 8:1536-1574. [PMID: 32110789 DOI: 10.1039/c9bm01337g] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polymer microcarriers are being extensively explored as cell delivery vehicles in cell-based therapies and hybrid tissue and organ engineering. Spherical microcarriers are of particular interest due to easy fabrication and injectability. They include microbeads, composed of a porous matrix, and microcapsules, where matrix core is additionally covered with a semipermeable membrane. Microcarriers provide cell containment at implantation site and protect the cells from host immunoresponse, degradation and shear stress. Immobilized cells may be genetically altered to release a specific therapeutic product directly at the target site, eliminating side effects of systemic therapies. Cell microcarriers need to fulfil a number of extremely high standards regarding their biocompatibility, cytocompatibility, immunoisolating capacity, transport, mechanical and chemical properties. To obtain cell microcarriers of specified parameters, a wide variety of polymers, both natural and synthetic, and immobilization methods can be applied. Yet so far, only a few approaches based on cell-laden microcarriers have reached clinical trials. The main issue that still impedes progress of these systems towards clinical application is limited cell survival in vivo. Herein, we review polymer biomaterials and methods used for fabrication of cell microcarriers for in vivo biomedical applications. We describe their key limitations and modifications aiming at improvement of microcarrier in vivo performance. We also present the main applications of polymer cell microcarriers in regenerative medicine, pancreatic islet and hepatocyte transplantation and in the treatment of cancer. Lastly, we outline the main challenges in cell microimmobilization for biomedical purposes, the strategies to overcome these issues and potential future improvements in this area.
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Affiliation(s)
- Barbara Kupikowska-Stobba
- Laboratory of Electrostatic Methods of Bioencapsulation, Department of Biomaterials and Biotechnological Systems, Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Trojdena 4, 02-109 Warsaw, Poland.
| | - Dorota Lewińska
- Laboratory of Electrostatic Methods of Bioencapsulation, Department of Biomaterials and Biotechnological Systems, Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Trojdena 4, 02-109 Warsaw, Poland.
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Guo S, Wang X, Wang G, Nie M. A Facile Route to Prepare PMMA/SiO
2
Core‐Shell Particles and PMMA Microcapsules via Sonochemical Graft Polymerization. ChemistrySelect 2019. [DOI: 10.1002/slct.201900426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Sheng‐Wei Guo
- School of Materials Science & EngineeringNorth Minzu University Yinchuan 750021 P. R. China
| | - Xin Wang
- School of Materials Science & EngineeringNorth Minzu University Yinchuan 750021 P. R. China
| | - Gu‐Xia Wang
- School of Chemistry & Chemical EngineeringNorth Minzu University Yinchuan 750021 P. R. China
| | - Min Nie
- State Key Laboratory of Polymer Materials EngineeringSichuan University) Chengdu 610065 P. R. China
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Peng Y, Li Q, Seekell RR, Kheir JN, Porter TM, Polizzotti BD. Tunable Nonlinear Acoustic Reporters Using Micro- and Nanosized Air Bubbles with Porous Polymeric Hard Shells. ACS APPLIED MATERIALS & INTERFACES 2019; 11:7-12. [PMID: 30444111 DOI: 10.1021/acsami.8b16737] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The ability to tailor acoustic cavitation of contrast agents is pivotal for ultrasound applications in enhanced imaging, drug delivery, and cancer therapy, etc. A biopolymer-based system of microbubbles and nanobubbles was developed as acoustic reporters that consist of extremely porous hard shells. Despite the existence of an incompressible shell, these porous contrast agents exhibited strong nonlinear acoustic response under very low acoustic pressure, e.g, harmonics, characteristic of free gas bubbles. The large air/water surface area within the transmural capillaries are believed to facilitate oscillation of the inner gas core. Furthermore, the acoustic cavitation can be tailored by variation in polymer structures. This synthetically based platform offers insight for the rational design of advanced acoustic biomaterials.
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Affiliation(s)
- Yifeng Peng
- Department of Cardiology , Boston Children's Hospital , Boston , Massachusetts 02115 , United States
- Department of Pediatrics , Harvard Medical School , Boston , Massachussets 02115 , United States
| | - Qian Li
- Department of Biomedical Engineering , Boston University , Boston , Massachusetts 02215 , United States
| | - Raymond R Seekell
- Department of Cardiology , Boston Children's Hospital , Boston , Massachusetts 02115 , United States
- Department of Pediatrics , Harvard Medical School , Boston , Massachussets 02115 , United States
| | - John N Kheir
- Department of Cardiology , Boston Children's Hospital , Boston , Massachusetts 02115 , United States
- Department of Pediatrics , Harvard Medical School , Boston , Massachussets 02115 , United States
| | - Tyrone M Porter
- Department of Biomedical Engineering , Boston University , Boston , Massachusetts 02215 , United States
| | - Brian D Polizzotti
- Department of Cardiology , Boston Children's Hospital , Boston , Massachusetts 02115 , United States
- Department of Pediatrics , Harvard Medical School , Boston , Massachussets 02115 , United States
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