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Tang W, Zhuang J, Anselmo AC, Xu X, Duan A, Zhang R, Sugarman JL, Zeng Y, Rosenberg E, Graf T, McHugh KJ, Tzeng SY, Behrens AM, Freed LE, Jing L, Jayawardena S, Weinstock SB, Le X, Sears C, Oxley J, Daristotle JL, Collins J, Langer R, Jaklenec A. Enhanced stability and clinical absorption of a form of encapsulated vitamin A for food fortification. Proc Natl Acad Sci U S A 2022; 119:e2211534119. [PMID: 36508653 PMCID: PMC9907063 DOI: 10.1073/pnas.2211534119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/16/2022] [Indexed: 12/15/2022] Open
Abstract
Food fortification is an effective strategy to address vitamin A (VitA) deficiency, which is the leading cause of childhood blindness and drastically increases mortality from severe infections. However, VitA food fortification remains challenging due to significant degradation during storage and cooking. We utilized an FDA-approved, thermostable, and pH-responsive basic methacrylate copolymer (BMC) to encapsulate and stabilize VitA in microparticles (MPs). Encapsulation of VitA in VitA-BMC MPs greatly improved stability during simulated cooking conditions and long-term storage. VitA absorption was nine times greater from cooked MPs than from cooked free VitA in rats. In a randomized controlled cross-over study in healthy premenopausal women, VitA was readily released from MPs after consumption and had a similar absorption profile to free VitA. This VitA encapsulation technology will enable global food fortification strategies toward eliminating VitA deficiency.
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Affiliation(s)
- Wen Tang
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou510640, China
| | - Jia Zhuang
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | | | - Xian Xu
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Aranda Duan
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Ruojie Zhang
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - James L. Sugarman
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Yingying Zeng
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Evan Rosenberg
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Tyler Graf
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Kevin J. McHugh
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
- Rice University, Houston, TX77005
| | - Stephany Y. Tzeng
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD21231
| | - Adam M. Behrens
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Lisa E. Freed
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Lihong Jing
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
- Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Zhong Guan Cun, Beijing100190, China
| | - Surangi Jayawardena
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | | | - Xiao Le
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | | | - James Oxley
- Southwest Research Institute, San Antonio, TX, 78238
| | - John L. Daristotle
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | | | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research.Massachusetts Institute of Technology, Cambridge, MA, 02139
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Sarmadi M, Ta C, VanLonkhuyzen AM, De Fiesta DC, Kanelli M, Sadeghi I, Behrens AM, Ingalls B, Menon N, Daristotle JL, Yu J, Langer R, Jaklenec A. Experimental and computational understanding of pulsatile release mechanism from biodegradable core-shell microparticles. Sci Adv 2022; 8:eabn5315. [PMID: 35857507 PMCID: PMC9278852 DOI: 10.1126/sciadv.abn5315] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 05/28/2022] [Indexed: 05/11/2023]
Abstract
Next-generation therapeutics require advanced drug delivery platforms with precise control over morphology and release kinetics. A recently developed microfabrication technique enables fabrication of a new class of injectable microparticles with a hollow core-shell structure that displays pulsatile release kinetics, providing such capabilities. Here, we study this technology and the resulting core-shell microstructures. We demonstrated that pulsatile release is governed by a sudden increase in porosity of the polymeric matrix, leading to the formation of a porous path connecting the core to the environment. Moreover, the release kinetics within the range studied remained primarily independent of the particle geometry but highly dependent on its composition. A qualitative technique was developed to study the pattern of pH evolution in the particles. A computational model successfully modeled deformations, indicating sudden expansion of the particle before onset of release. Results of this study contribute to the understanding and design of advanced drug delivery systems.
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Affiliation(s)
- Morteza Sarmadi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Christina Ta
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Abigail M. VanLonkhuyzen
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Dominique C. De Fiesta
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Maria Kanelli
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ilin Sadeghi
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Adam M. Behrens
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Bailey Ingalls
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Nandita Menon
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - John L. Daristotle
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Julie Yu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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3
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Yigit S, Hallaj NS, Sugarman JL, Chong LC, Roman SE, Abu-Taleb LM, Goodman RE, Johnson PE, Behrens AM. Toxicological assessment and food allergy of silk fibroin derived from Bombyx mori cocoons. Food Chem Toxicol 2021; 151:112117. [DOI: 10.1016/j.fct.2021.112117] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 12/21/2022]
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4
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Sarmadi M, Behrens AM, McHugh KJ, Contreras HTM, Tochka ZL, Lu X, Langer R, Jaklenec A. Modeling, design, and machine learning-based framework for optimal injectability of microparticle-based drug formulations. Sci Adv 2020; 6:eabb6594. [PMID: 32923598 PMCID: PMC7455482 DOI: 10.1126/sciadv.abb6594] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/22/2020] [Indexed: 05/14/2023]
Abstract
Inefficient injection of microparticles through conventional hypodermic needles can impose serious challenges on clinical translation of biopharmaceutical drugs and microparticle-based drug formulations. This study aims to determine the important factors affecting microparticle injectability and establish a predictive framework using computational fluid dynamics, design of experiments, and machine learning. A numerical multiphysics model was developed to examine microparticle flow and needle blockage in a syringe-needle system. Using experimental data, a simple empirical mathematical model was introduced. Results from injection experiments were subsequently incorporated into an artificial neural network to establish a predictive framework for injectability. Last, simulations and experimental results contributed to the design of a syringe that maximizes injectability in vitro and in vivo. The custom injection system enabled a sixfold increase in injectability of large microparticles compared to a commercial syringe. This study highlights the importance of the proposed framework for optimal injection of microparticle-based drugs by parenteral routes.
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Affiliation(s)
- Morteza Sarmadi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Adam M. Behrens
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kevin J. McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Hannah T. M. Contreras
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Zachary L. Tochka
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xueguang Lu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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5
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Anselmo AC, Xu X, Buerkli S, Zeng Y, Tang W, McHugh KJ, Behrens AM, Rosenberg E, Duan AR, Sugarman JL, Zhuang J, Collins J, Lu X, Graf T, Tzeng SY, Rose S, Acolatse S, Nguyen TD, Le X, Guerra AS, Freed LE, Weinstock SB, Sears CB, Nikolic B, Wood L, Welkhoff PA, Oxley JD, Moretti D, Zimmermann MB, Langer R, Jaklenec A. A heat-stable microparticle platform for oral micronutrient delivery. Sci Transl Med 2019; 11:11/518/eaaw3680. [DOI: 10.1126/scitranslmed.aaw3680] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 09/16/2019] [Indexed: 12/30/2022]
Abstract
Micronutrient deficiencies affect up to 2 billion people and are the leading cause of cognitive and physical disorders in the developing world. Food fortification is effective in treating micronutrient deficiencies; however, its global implementation has been limited by technical challenges in maintaining micronutrient stability during cooking and storage. We hypothesized that polymer-based encapsulation could address this and facilitate micronutrient absorption. We identified poly(butylmethacrylate-co-(2-dimethylaminoethyl)methacrylate-co-methylmethacrylate) (1:2:1) (BMC) as a material with proven safety, offering stability in boiling water, rapid dissolution in gastric acid, and the ability to encapsulate distinct micronutrients. We encapsulated 11 micronutrients (iron; iodine; zinc; and vitamins A, B2, niacin, biotin, folic acid, B12, C, and D) and co-encapsulated up to 4 micronutrients. Encapsulation improved micronutrient stability against heat, light, moisture, and oxidation. Rodent studies confirmed rapid micronutrient release in the stomach and intestinal absorption. Bioavailability of iron from microparticles, compared to free iron, was lower in an initial human study. An organotypic human intestinal model revealed that increased iron loading and decreased polymer content would improve absorption. Using process development approaches capable of kilogram-scale synthesis, we increased iron loading more than 30-fold. Scaled batches tested in a follow-up human study exhibited up to 89% relative iron bioavailability compared to free iron. Collectively, these studies describe a broad approach for clinical translation of a heat-stable ingestible micronutrient delivery platform with the potential to improve micronutrient deficiency in the developing world. These approaches could potentially be applied toward clinical translation of other materials, such as natural polymers, for encapsulation and oral delivery of micronutrients.
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Affiliation(s)
- Aaron C. Anselmo
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xian Xu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Simone Buerkli
- Institute of Food Nutrition and Health, ETH Zürich, Zürich 8092, Switzerland
| | - Yingying Zeng
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Wen Tang
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kevin J. McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Adam M. Behrens
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Evan Rosenberg
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Aranda R. Duan
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - James L. Sugarman
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jia Zhuang
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Joe Collins
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xueguang Lu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Tyler Graf
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Stephany Y. Tzeng
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sviatlana Rose
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sarah Acolatse
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Thanh D. Nguyen
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xiao Le
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ana Sofia Guerra
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Lisa E. Freed
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Shelley B. Weinstock
- Institute of Human Nutrition, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | | | - Boris Nikolic
- Biomatics Capital, 1107 1st Avenue, Apartment 1305, Seattle, WA 98101, USA
| | - Lowell Wood
- Institute for Disease Modeling, Bellevue, WA 98005, USA
| | | | - James D. Oxley
- Southwest Research Institute, San Antonio, TX 78238, USA
| | - Diego Moretti
- Institute of Food Nutrition and Health, ETH Zürich, Zürich 8092, Switzerland
| | | | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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6
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Li Z, Behrens AM, Ginat N, Tzeng SY, Lu X, Sivan S, Langer R, Jaklenec A. Biofilm-Inspired Encapsulation of Probiotics for the Treatment of Complex Infections. Adv Mater 2018; 30:e1803925. [PMID: 30328144 DOI: 10.1002/adma.201803925] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 08/25/2018] [Indexed: 05/18/2023]
Abstract
The emergence of antimicrobial resistance poses a major challenge to healthcare. Probiotics offer a potential alternative treatment method but are often incompatible with antibiotics themselves, diminishing their overall therapeutic utility. This work uses biofilm-inspired encapsulation of probiotics to confer temporary antibiotic protection and to enable the coadministration of probiotics and antibiotics. Probiotics are encapsulated within alginate, a crucial component of pseudomonas biofilms, based on a simple two-step alginate cross-linking procedure. Following exposure to the antibiotic tobramycin, the growth and metabolic activity of encapsulated probiotics are unaffected by tobramycin, and they show a four-log survival advantage over free probiotics. This results from tobramycin sequestration on the periphery of alginate beads which prevents its diffusion into the core but yet allows probiotic byproducts to diffuse outward. It is demonstrated that this approach using tobramycin combined with encapsulated probiotic has the ability to completely eradicate methicillin-resistant Staphylococcus aureus and Pseudomonas aeruginosa in coculture, the two most widely implicated bacteria in chronic wounds.
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Affiliation(s)
- Zhihao Li
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
| | - Adam M Behrens
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
| | - Nitzan Ginat
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
| | - Stephany Y Tzeng
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
| | - Xueguang Lu
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
| | - Sarit Sivan
- Department of Biotechnology Engineering, Ort Braude College, P.O. Box 78, Karmiel, 21982, Israel
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research Massachusetts Institute of Technology 500 Main Street, Cambridge, MA, 02139, USA
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7
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Ferber S, Behrens AM, McHugh KJ, Rosenberg EM, Linehan AR, Sugarman JL, Jayawardena HSN, Langer R, Jaklenec A. Evaporative Cooling Hydrogel Packaging for Storing Biologics Outside of the Cold Chain. Adv Healthc Mater 2018; 7:e1800220. [PMID: 29732715 DOI: 10.1002/adhm.201800220] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Indexed: 01/01/2023]
Abstract
Stabilizing thermolabile pharmaceuticals outside of the cold chain has the potential to alleviate some of the logistical and monetary burden of providing health care access in the developing world. Evaporative cooling hydrogel packaging is designed to extend the storage stability of existing pharmaceutical products without the need for reformulation. Hydrogels with high water content and reversible hydrophilicity offer a promising platform for reducing storage temperatures without refrigeration. As a model, poly(N-isopropylacrylamide) is selected as a basis for creating a potentially low cost and easy-to-fabricate hydrogels.
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Affiliation(s)
- Shiran Ferber
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Adam M. Behrens
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Kevin J. McHugh
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Evan M. Rosenberg
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Allison R. Linehan
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - James L. Sugarman
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | | | - Robert Langer
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Ana Jaklenec
- David H. Koch Institute of Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
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8
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Tzeng SY, McHugh KJ, Behrens AM, Rose S, Sugarman JL, Ferber S, Langer R, Jaklenec A. Stabilized single-injection inactivated polio vaccine elicits a strong neutralizing immune response. Proc Natl Acad Sci U S A 2018; 115:E5269-E5278. [PMID: 29784798 PMCID: PMC6003376 DOI: 10.1073/pnas.1720970115] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Vaccination in the developing world is hampered by limited patient access, which prevents individuals from receiving the multiple injections necessary for protective immunity. Here, we developed an injectable microparticle formulation of the inactivated polio vaccine (IPV) that releases multiple pulses of stable antigen over time. To accomplish this, we established an IPV stabilization strategy using cationic polymers for pH modulation to enhance traditional small-molecule-based stabilization methods. We investigated the mechanism of this strategy and showed that it was broadly applicable to all three antigens in IPV. Our lead formulations released two bursts of IPV 1 month apart, mimicking a typical vaccination schedule in the developing world. One injection of the controlled-release formulations elicited a similar or better neutralizing response in rats, considered the correlate of protection in humans, than multiple injections of liquid vaccine. This single-administration vaccine strategy has the potential to improve vaccine coverage in the developing world.
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Affiliation(s)
- Stephany Y Tzeng
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21231
| | - Kevin J McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Adam M Behrens
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Sviatlana Rose
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - James L Sugarman
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Shiran Ferber
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139;
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139;
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9
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McHugh KJ, Jing L, Behrens AM, Jayawardena S, Tang W, Gao M, Langer R, Jaklenec A. Biocompatible Semiconductor Quantum Dots as Cancer Imaging Agents. Adv Mater 2018; 30:e1706356. [PMID: 29468747 DOI: 10.1002/adma.201706356] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 11/26/2017] [Indexed: 05/20/2023]
Abstract
Approximately 1.7 million new cases of cancer will be diagnosed this year in the United States leading to 600 000 deaths. Patient survival rates are highly correlated with the stage of cancer diagnosis, with localized and regional remission rates that are much higher than for metastatic cancer. The current standard of care for many solid tumors includes imaging and biopsy with histological assessment. In many cases, after tomographical imaging modalities have identified abnormal morphology consistent with cancer, surgery is performed to remove the primary tumor and evaluate the surrounding lymph nodes. Accurate identification of tumor margins and staging are critical for selecting optimal treatments to minimize recurrence. Visible, fluorescent, and radiolabeled small molecules have been used as contrast agents to improve detection during real-time intraoperative imaging. Unfortunately, current dyes lack the tissue specificity, stability, and signal penetration needed for optimal performance. Quantum dots (QDs) represent an exciting class of fluorescent probes for optical imaging with tunable optical properties, high stability, and the ability to target tumors or lymph nodes based on surface functionalization. Here, state-of-the-art biocompatible QDs are compared with current Food and Drug Administration approved fluorophores used in cancer imaging and a perspective on the pathway to clinical translation is provided.
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Affiliation(s)
- Kevin J McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Lihong Jing
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Institute of Chemistry, Chinese Academy of Sciences, Bei Yi Jie 2, Zhong Guan Cun, Beijing, 100190, China
| | - Adam M Behrens
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Surangi Jayawardena
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Wen Tang
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Mingyuan Gao
- Institute of Chemistry, Chinese Academy of Sciences, Bei Yi Jie 2, Zhong Guan Cun, Beijing, 100190, China
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
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10
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Vural M, Behrens AM, Hwang W, Ayoub JJ, Chasser D, von Wald Cresce A, Ayyub OB, Briber RM, Kofinas P. Spray-Processed Composites with High Conductivity and Elasticity. ACS Appl Mater Interfaces 2018; 10:13953-13962. [PMID: 29557171 PMCID: PMC6241284 DOI: 10.1021/acsami.8b00068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Highly conductive elastic composites were constructed using multistep solution-based fabrication methods that included the deposition of a nonwoven polymer fiber mat through solution blow spinning and nanoparticle nucleation. High nanoparticle loading was achieved by introducing silver nanoparticles into the fiber spinning solution. The presence of the silver nanoparticles facilitates improved uptake of silver nanoparticle precursor in subsequent processing steps. The precursor is used to generate a second nanoparticle population, leading to high loading and conductivity. Establishing high nanoparticle loading in a microfibrous block copolymer network generated deformable composites that can sustain electrical conductivities reaching 9000 S/cm under 100% tensile strain. These conductive elastic fabrics can retain at least 70% of their initial electrical conductivity after being stretched to 100% strain and released for 500 cycles. This composite material system has the potential to be implemented in wearable electronics and robotic systems.
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Affiliation(s)
- Mert Vural
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Adam M. Behrens
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Wonseok Hwang
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Joseph J. Ayoub
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Dalton Chasser
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Arthur von Wald Cresce
- Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division, U.S. Army Research Laboratory, Adelphi, Maryland 20783, United States
| | - Omar B. Ayyub
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Robert M. Briber
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - Peter Kofinas
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, United States
- Corresponding Author
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11
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McHugh KJ, Nguyen TD, Linehan AR, Yang D, Behrens AM, Rose S, Tochka ZL, Tzeng SY, Norman JJ, Anselmo AC, Xu X, Tomasic S, Taylor MA, Lu J, Guarecuco R, Langer R, Jaklenec A. Fabrication of fillable microparticles and other complex 3D microstructures. Science 2018; 357:1138-1142. [PMID: 28912242 PMCID: PMC6510330 DOI: 10.1126/science.aaf7447] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 05/04/2017] [Accepted: 08/14/2017] [Indexed: 12/18/2022]
Abstract
Three-dimensional (3D) microstructures created by microfabrication and additive manufacturing have demonstrated value across a number of fields, ranging from biomedicine to microelectronics. However, the techniques used to create these devices each have their own characteristic set of advantages and limitations with regards to resolution, material compatibility, and geometrical constraints that determine the types ofmicrostructures that can be formed.We describe a microfabrication method, termed StampEd Assembly of polymer Layers (SEAL), and create injectable pulsatile drug-delivery microparticles, pH sensors, and 3D microfluidic devices that we could not produce using traditional 3D printing. SEAL allows us to generate microstructures with complex geometry at high resolution, produce fully enclosed internal cavities containing a solid or liquid, and use potentially any thermoplastic material without processing additives.
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Affiliation(s)
- Kevin J McHugh
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Thanh D Nguyen
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Allison R Linehan
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - David Yang
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Adam M Behrens
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sviatlana Rose
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Zachary L Tochka
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Stephany Y Tzeng
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - James J Norman
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Aaron C Anselmo
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xian Xu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Stephanie Tomasic
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Matthew A Taylor
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jennifer Lu
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Rohiverth Guarecuco
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Ana Jaklenec
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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12
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Kern NG, Behrens AM, Srinivasan P, Rossi CT, Daristotle JL, Kofinas P, Sandler AD. Solution blow spun polymer: A novel preclinical surgical sealant for bowel anastomoses. J Pediatr Surg 2017; 52:1308-1312. [PMID: 27956071 PMCID: PMC5459684 DOI: 10.1016/j.jpedsurg.2016.11.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/15/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND Solution blow spinning is a technique for depositing polymer fibers with promising potential use as a surgical sealant. This study assessed the feasibility and efficacy of solution blow spun polymer (BSP) for sealing bowel perforations in a mouse model of partial cecal transection. We then evaluated its use for reinforcing a surgical anastomosis in a preclinical piglet model. METHODS Three commercially available surgical sealants (fibrin glue, polyethylene glycol (PEG) hydrogel, and cyanoacrylate) were compared to BSP in the ability to seal partially transected cecum in mice. For anastomosis feasibility testing in a piglet model, piglets were subjected to small bowel transection with sutured anastomosis reinforced with BSP application. Outcome measures included anastomotic burst pressure, anastomotic leak rate, 14-day survival, and complication rate. RESULTS For the mouse model, the survival rates for the sealants were 30% for fibrin glue, 20% for PEG hydrogel, 78% for cyanoacrylate, and 67% for BSP. Three of 9 mice died after BSP administration because of perforation leak, failure to thrive with partial obstruction at the perforation site, and unknown causes. All other mice died of perforation leak. The mean burst pressure at 24h was significantly higher for BSP (81mm Hg) when compared to fibrin glue (6mm Hg, p=0.047) or PEG hydrogel (10mm Hg, p=0.047), and comparable to cyanoacrylate (64mm Hg, p=0.91). For piglets, 4 of 4 animals survived at 14days. Mean burst pressures at time of surgery were 37±5mm Hg for BSP and 11±9mm Hg for suture-only controls (p=0.09). CONCLUSIONS Solution blow spinning may be an effective technique as an adjunct for sealing of gastrointestinal anastomosis. Further preclinical testing is warranted to better understand BSP properties and alternative surgical applications.
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Affiliation(s)
- Nora G Kern
- Sheikh Zayed Institute for Pediatric Surgical Innovation at Children's National Health System, 111 Michigan Ave. NW, Washington, DC 20010, USA; Department of Urology, University of Virginia Health System, PO Box 800422, Charlottesville, VA 22908, USA.
| | - Adam M Behrens
- Fischell Department of Bioengineering, University of Maryland, 8228 Paint Branch Dr., College Park, MD 20742, USA
| | - Priya Srinivasan
- Sheikh Zayed Institute for Pediatric Surgical Innovation at Children's National Health System, 111 Michigan Ave. NW, Washington, DC 20010, USA
| | - Christopher T Rossi
- Department of Pathology, Children's National Health System, 111 Michigan Ave. NW, Washington, DC 20010, USA
| | - John L Daristotle
- Fischell Department of Bioengineering, University of Maryland, 8228 Paint Branch Dr., College Park, MD 20742, USA
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, 8228 Paint Branch Dr., College Park, MD 20742, USA
| | - Anthony D Sandler
- Sheikh Zayed Institute for Pediatric Surgical Innovation at Children's National Health System, 111 Michigan Ave. NW, Washington, DC 20010, USA
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13
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Daristotle JL, Behrens AM, Sandler AD, Kofinas P. A Review of the Fundamental Principles and Applications of Solution Blow Spinning. ACS Appl Mater Interfaces 2016; 8:34951-34963. [PMID: 27966857 PMCID: PMC5673076 DOI: 10.1021/acsami.6b12994] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Solution blow spinning (SBS) is a technique that can be used to deposit fibers in situ at low cost for a variety of applications, which include biomedical materials and flexible electronics. This review is intended to provide an overview of the basic principles and applications of SBS. We first describe a method for creating a spinnable polymer solution and stable polymer solution jet by manipulating parameters such as polymer concentration and gas pressure. This method is based on fundamental insights, theoretical models, and empirical studies. We then discuss the unique bundled morphology and mechanical properties of fiber mats produced by SBS, and how they compare with electrospun fiber mats. Applications of SBS in biomedical engineering are highlighted, showing enhanced cell infiltration and proliferation versus electrospun fiber scaffolds and in situ deposition of biodegradable polymers. We also discuss the impact of SBS in applications involving textiles and electronics, including ceramic fibers and conductive composite materials. Strategies for future research are presented that take advantage of direct and rapid polymer deposition via cost-effective methods.
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Affiliation(s)
- John L. Daristotle
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States
| | - Adam M. Behrens
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States
| | - Anthony D. Sandler
- Sheikh Zayed Institute for Pediatric Surgical Innovation Joseph E. Robert Jr. Center for Surgical Care, Children’s National Medical Center, 111 Michigan Avenue NW, Washington, DC 20010, United States
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States
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14
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Behrens AM, Kim J, Hotaling N, Seppala JE, Kofinas P, Tutak W. Rapid fabrication of poly(DL-lactide) nanofiber scaffolds with tunable degradation for tissue engineering applications by air-brushing. Biomed Mater 2016; 11:035001. [PMID: 27121660 PMCID: PMC4963247 DOI: 10.1088/1748-6041/11/3/035001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Polymer nanofiber based materials have been widely investigated for use as tissue engineering scaffolds. While promising, these materials are typically fabricated through techniques that require significant time or cost. Here we report a rapid and cost effective air-brushing method for fabricating nanofiber scaffolds using a simple handheld apparatus, compressed air, and a polymer solution. Air-brushing also facilities control over the scaffold degradation rate without adversely impacting architecture. This was accomplished through a one step blending process of high (M w ≈ 100 000 g mol(-1)) and low (M w ≈ 25 000 g mol(-1)) molecular weight poly(DL-lactide) (PDLLA) polymers at various ratios (100:0, 70:30 and 50:50). Through this approach, we were able to control fiber scaffold degradation rate while maintaining similar fiber morphology, scaffold porosity, and bulk mechanical properties across all of the tested compositions. The impact of altered degradation rates was biologically evaluated in human bone marrow stromal cell (hBMSC) cultures for up to 16 days and demonstrated degradation rate dependence of both total DNA concentration and gene regulation.
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Affiliation(s)
- Adam M Behrens
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD, USA
| | - Jeffrey Kim
- Volpe Research Center ADA Foundation, 100 Bureau Dr, Gaithersburg, MD, USA
| | - Nathan Hotaling
- Biosystems and Biomaterials Division, National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD, USA
| | - Jonathan E Seppala
- Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Dr, Gaithersburg, MD, USA
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD, USA
| | - Wojtek Tutak
- Volpe Research Center ADA Foundation, 100 Bureau Dr, Gaithersburg, MD, USA
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15
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Behrens AM, Lee NG, Casey BJ, Srinivasan P, Sikorski MJ, Daristotle JL, Sandler AD, Kofinas P. Biodegradable-Polymer-Blend-Based Surgical Sealant with Body-Temperature-Mediated Adhesion. Adv Mater 2015; 27:8056-61. [PMID: 26554545 PMCID: PMC4961426 DOI: 10.1002/adma.201503691] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/30/2015] [Indexed: 05/20/2023]
Abstract
The development of practical and efficient surgical sealants has the propensity to improve operational outcomes. A biodegradable polymer blend is fabricated as a nonwoven fiber mat in situ. After direct deposition onto the tissue of interest, the material transitions from a fiber mat to a film. This transition promotes polymer-substrate interfacial interactions leading to improved adhesion and surgical sealant performance.
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Affiliation(s)
- Adam M. Behrens
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
| | - Nora G. Lee
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, 111 Michigan Avenue, NW Washington, DC, USA
| | - Brendan J. Casey
- Office of Medical Products and Tobacco, Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, Division of Biology, Chemistry and Materials Science, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, USA
| | - Priya Srinivasan
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, 111 Michigan Avenue, NW Washington, DC, USA
| | - Michael J. Sikorski
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
| | - John L. Daristotle
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
| | - Anthony D. Sandler
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, 111 Michigan Avenue, NW Washington, DC, USA
| | - Peter Kofinas
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
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16
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Ayyub OB, Behrens AM, Heligman BT, Natoli ME, Ayoub JJ, Cunningham G, Summar M, Kofinas P. Simple and inexpensive quantification of ammonia in whole blood. Mol Genet Metab 2015; 115:95-100. [PMID: 25936660 PMCID: PMC4462127 DOI: 10.1016/j.ymgme.2015.04.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 04/18/2015] [Accepted: 04/25/2015] [Indexed: 12/30/2022]
Abstract
Quantification of ammonia in whole blood has applications in the diagnosis and management of many hepatic diseases, including cirrhosis and rare urea cycle disorders, amounting to more than 5 million patients in the United States. Current techniques for ammonia measurement suffer from limited range, poor resolution, false positives or large, complex sensor set-ups. Here we demonstrate a technique utilizing inexpensive reagents and simple methods for quantifying ammonia in 100 μL of whole blood. The sensor comprises a modified form of the indophenol reaction, which resists sources of destructive interference in blood, in conjunction with a cation-exchange membrane. The presented sensing scheme is selective against other amine containing molecules such as amino acids and has a shelf life of at least 50 days. Additionally, the resulting system has high sensitivity and allows for the accurate reliable quantification of ammonia in whole human blood samples at a minimum range of 25 to 500 μM, which is clinically for rare hyperammonemic disorders and liver disease. Furthermore, concentrations of 50 and 100 μM ammonia could be reliably discerned with p = 0.0001.
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Affiliation(s)
- Omar B Ayyub
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, United States
| | - Adam M Behrens
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, United States
| | - Brian T Heligman
- Material Science and Engineering, University of Maryland, College Park, MD 20742, United States
| | - Mary E Natoli
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, United States
| | - Joseph J Ayoub
- Material Science and Engineering, University of Maryland, College Park, MD 20742, United States
| | - Gary Cunningham
- Genetics and Metabolism, Children's National Medical Center, Washington, DC 20010, United States
| | - Marshall Summar
- Genetics and Metabolism, Children's National Medical Center, Washington, DC 20010, United States.
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, United States.
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17
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Vural M, Behrens AM, Ayyub OB, Ayoub JJ, Kofinas P. Sprayable elastic conductors based on block copolymer silver nanoparticle composites. ACS Nano 2015; 9:336-44. [PMID: 25491507 PMCID: PMC4310637 DOI: 10.1021/nn505306h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 12/09/2014] [Indexed: 05/18/2023]
Abstract
Block copolymer silver nanoparticle composite elastic conductors were fabricated through solution blow spinning and subsequent nanoparticle nucleation. The reported technique allows for conformal deposition onto nonplanar substrates. We additionally demonstrated the ability to tune the strain dependence of the electrical properties by adjusting nanoparticle precursor concentration or localized nanoparticle nucleation. The stretchable fiber mats were able to display electrical conductivity values as high as 2000 ± 200 S/cm with only a 12% increase in resistance after 400 cycles of 150% strain. Stretchable elastic conductors with similar and higher bulk conductivity have not achieved comparable stability of electrical properties. These unique electromechanical characteristics are primarily the result of structural changes during mechanical deformation. The versatility of this approach was demonstrated by constructing a stretchable light emitting diode circuit and a strain sensor on planar and nonplanar substrates.
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Affiliation(s)
- Mert Vural
- Department of Materials Science and Engineering and Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Adam M. Behrens
- Department of Materials Science and Engineering and Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Omar B. Ayyub
- Department of Materials Science and Engineering and Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Joseph J. Ayoub
- Department of Materials Science and Engineering and Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Peter Kofinas
- Department of Materials Science and Engineering and Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
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18
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Behrens AM, Casey BJ, Sikorski MJ, Wu KL, Tutak W, Sandler AD, Kofinas P. In Situ Deposition of PLGA Nanofibers via Solution Blow Spinning. ACS Macro Lett 2014; 3:249-254. [PMID: 35590515 DOI: 10.1021/mz500049x] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nanofiber mats and scaffolds have been widely investigated for biomedical applications. Commonly fabricated using electrospinning, nanofibers are generated ex situ using an apparatus that requires high voltages and an electrically conductive target. We report the use of solution blow spinning to generate conformal nanofiber mats/meshes on any surface in situ, utilizing only a commercial airbrush and compressed CO2. Solution and deposition conditions of PLGA nanofibers were optimized and mechanical properties characterized with dynamic mechanical analysis. Nanofiber mat degradation was monitored for morphologic and molecular weight changes in vitro. Biocompatibility of the direct deposition of nanofibers onto two cell lines was demonstrated in vitro and interaction with blood was qualitatively assessed with scanning electron microscopy. A pilot animal study illustrated the wide potential of this technique across multiple surgical applications, including its use as a surgical sealant, hemostatic, and buttress for tissue repair.
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Affiliation(s)
- Adam M. Behrens
- Fischell
Department of Bioengineering, University of Maryland, 2330 Jeong
H. Kim Engineering Building, College Park, Maryland, United States
| | - Brendan J. Casey
- Office
of Medical Products and Tobacco, Center for Devices and Radiological
Health, Office of Science and Engineering Laboratories, Division of
Chemistry and Materials Science, U.S. Food and Drug Administration, 10903 New Hampshire Ave, Silver Spring, Maryland, United States
| | - Michael J. Sikorski
- Fischell
Department of Bioengineering, University of Maryland, 2330 Jeong
H. Kim Engineering Building, College Park, Maryland, United States
| | - Kyle L. Wu
- Sheikh Zayed
Institute
for Pediatric Surgical Innovation at Children’s National Medical
Center, 111 Michigan Ave NW, Washington, District of Columbia, United States
| | - Wojtek Tutak
- American
Dental Association Foundation, National Institute of
Standards and Technology, 100 Bureau
Drive, Building 224, Room A153, Gaithersburg, Maryland, United States
| | - Anthony D. Sandler
- Sheikh Zayed
Institute
for Pediatric Surgical Innovation at Children’s National Medical
Center, 111 Michigan Ave NW, Washington, District of Columbia, United States
| | - Peter Kofinas
- Fischell
Department of Bioengineering, University of Maryland, 2330 Jeong
H. Kim Engineering Building, College Park, Maryland, United States
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19
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Behrens AM, Sikorski MJ, Li T, Wu ZJ, Griffith BP, Kofinas P. Blood-aggregating hydrogel particles for use as a hemostatic agent. Acta Biomater 2014; 10:701-8. [PMID: 24185001 DOI: 10.1016/j.actbio.2013.10.029] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/27/2013] [Accepted: 10/24/2013] [Indexed: 12/22/2022]
Abstract
The body is unable to control massive blood loss without treatment. Available hemostatic agents are often expensive, ineffective or raise safety concerns. Synthetic hydrogel particles are an inexpensive and promising alternative. In this study we synthesized and characterized N-(3-aminopropyl)methacrylamide (APM) hydrogel particles and investigated their use as a hemostatic material. The APM hydrogel particles were synthesized via inverse suspension polymerization with a narrow size distribution and rapid swelling behavior. In vitro coagulation studies showed hydrogel particle blood aggregate formation as well as bulk blood coagulation inhibition. In vivo studies using multiple rat injury and ovine liver laceration models demonstrated the particles' ability to aid in rapid hemostasis. Subsequent hematoxylin and eosin and Carstairs' method staining of the ovine liver incision sites showed significant hemostatic plug formation. This study suggests that these cationic hydrogel particles form a physical barrier to blood loss by forming aggregates, while causing a general decrease in coagulation activity in the bulk. The formation of a rapid sealant through aggregation and the promotion of local hemostasis through electrostatic interactions are coupled with a decrease in overall coagulation activity. These interactions require the interplay of a variety of mechanisms stemming from a simple synthetic platform.
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Affiliation(s)
- Adam M Behrens
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD 20742, USA
| | - Michael J Sikorski
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD 20742, USA
| | - Tieluo Li
- Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, MD 21201, USA
| | - Zhongjun J Wu
- Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, MD 21201, USA
| | - Bartley P Griffith
- Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, MD 21201, USA
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, MD 20742, USA.
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20
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Behrens AM, Sikorski MJ, Kofinas P. Hemostatic strategies for traumatic and surgical bleeding. J Biomed Mater Res A 2013; 102:4182-94. [PMID: 24307256 DOI: 10.1002/jbm.a.35052] [Citation(s) in RCA: 170] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/18/2013] [Accepted: 12/02/2013] [Indexed: 12/23/2022]
Abstract
Wide interest in new hemostatic approaches has stemmed from unmet needs in the hospital and on the battlefield. Many current commercial hemostatic agents fail to fulfill the design requirements of safety, efficacy, cost, and storage. Academic focus has led to the improvement of existing strategies as well as new developments. This review will identify and discuss the three major classes of hemostatic approaches: biologically derived materials, synthetically derived materials, and intravenously administered hemostatic agents. The general class is first discussed, then specific approaches discussed in detail, including the hemostatic mechanisms and the advancement of the method. As hemostatic strategies evolve and synthetic-biologic interactions are more fully understood, current clinical methodologies will be replaced.
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Affiliation(s)
- Adam M Behrens
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland, 20742
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21
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Casey BJ, Behrens AM, Tsinas ZI, Hess JR, Wu ZJ, Griffith BP, Kofinas P. In vitroandin vivoevaluation of polymer hydrogels for hemorrhage control. Journal of Biomaterials Science, Polymer Edition 2013; 24:1781-93. [DOI: 10.1080/09205063.2013.801707] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Brendan J. Casey
- a Fischell Department of Bioengineering , University of Maryland , 2330 Jeong H. Kim Engineering Building, College Park , MD , 20742 , USA
| | - Adam M. Behrens
- a Fischell Department of Bioengineering , University of Maryland , 2330 Jeong H. Kim Engineering Building, College Park , MD , 20742 , USA
| | - Zois I. Tsinas
- a Fischell Department of Bioengineering , University of Maryland , 2330 Jeong H. Kim Engineering Building, College Park , MD , 20742 , USA
| | - John R. Hess
- b Department of Pathology , University of Maryland School of Medicine, University of Maryland Medical Center , Blood Bank N2W50a, Baltimore , MD , 21201 , USA
| | - Zhongjun J. Wu
- c Department of Surgery , University of Maryland School of Medicine , MSTF Building Room 434F, 10 South Pine Street, Baltimore , MD , 21201 , USA
| | - Bartley P. Griffith
- c Department of Surgery , University of Maryland School of Medicine , MSTF Building Room 434F, 10 South Pine Street, Baltimore , MD , 21201 , USA
| | - Peter Kofinas
- a Fischell Department of Bioengineering , University of Maryland , 2330 Jeong H. Kim Engineering Building, College Park , MD , 20742 , USA
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Casey BJ, Behrens AM, Hess JR, Wu ZJ, Griffith BP, Kofinas P. FVII Dependent Coagulation Activation in Citrated Plasma by Polymer Hydrogels. Biomacromolecules 2010; 11:3248-55. [DOI: 10.1021/bm101147w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brendan J. Casey
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States, Department of Pathology, University of Maryland School of Medicine, University of Maryland Medical Center, Blood Bank N2W50a, Baltimore, Maryland 21201, United States, and Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - Adam M. Behrens
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States, Department of Pathology, University of Maryland School of Medicine, University of Maryland Medical Center, Blood Bank N2W50a, Baltimore, Maryland 21201, United States, and Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - John R. Hess
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States, Department of Pathology, University of Maryland School of Medicine, University of Maryland Medical Center, Blood Bank N2W50a, Baltimore, Maryland 21201, United States, and Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - Zhongjun J. Wu
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States, Department of Pathology, University of Maryland School of Medicine, University of Maryland Medical Center, Blood Bank N2W50a, Baltimore, Maryland 21201, United States, and Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - Bartley P. Griffith
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States, Department of Pathology, University of Maryland School of Medicine, University of Maryland Medical Center, Blood Bank N2W50a, Baltimore, Maryland 21201, United States, and Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, Maryland 21201, United States
| | - Peter Kofinas
- Fischell Department of Bioengineering, University of Maryland, 2330 Jeong H. Kim Engineering Building, College Park, Maryland 20742, United States, Department of Pathology, University of Maryland School of Medicine, University of Maryland Medical Center, Blood Bank N2W50a, Baltimore, Maryland 21201, United States, and Department of Surgery, University of Maryland School of Medicine, Medical School Teaching Facility Building Room 434F, 10 South Pine Street, Baltimore, Maryland 21201, United States
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