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Mueller MC, Du Y, Walker LA, Magin CM. Dynamically stiffening biomaterials reveal age- and sex-specific differences in pulmonary arterial adventitial fibroblast activation. Matrix Biol Plus 2024; 22:100145. [PMID: 38699486 PMCID: PMC11063519 DOI: 10.1016/j.mbplus.2024.100145] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/08/2024] [Accepted: 04/08/2024] [Indexed: 05/05/2024] Open
Abstract
Respiratory diseases like pulmonary arterial hypertension (PAH) frequently exhibit sexual dimorphism. Female PAH patients are more susceptible to the disease but have increased survival rates. This phenomenon is known as the estrogen paradox, and the underlying mechanisms are not fully understood. During PAH progression in vivo, human pulmonary arterial adventitial fibroblasts (hPAAFs) differentiate into an activated phenotype. These cells produce excess, aberrant extracellular matrix proteins that stiffen the surrounding pulmonary arterial tissues. Here, we employed dynamic poly(ethylene glycol)-alpha methacrylate (PEGαMA)-based biomaterials to study how the age and sex of human serum influenced hPAAF activation in response to microenvironmental stiffening in vitro. Results showed female and male cells responded differently to increases in microenvironmental stiffness and serum composition. Male hPAAFs were less activated than female cells on soft hydrogels and more responsive to increases in microenvironmental stiffness regardless of serum composition. Female hPAAF activation followed this pattern only when cultured in younger (age < 50) female serum or when older (age ≥ 50) female serum was supplemented with estradiol. Otherwise, female hPAAF activation was relatively high on both soft and stiffened hydrogels, with little difference in activation between the two conditions. Collectively, these results suggest that it may be possible to model the estrogen paradox observed in PAH in vitro and that it is critical for researchers to report cell sex and serum source when conducting in vitro experimentation.
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Affiliation(s)
- Mikala C. Mueller
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA
| | - Yanmei Du
- Division of Cardiology, Department of Medicine, University of Colorado, Anschutz Medical Campus, USA
| | - Lori A. Walker
- Division of Cardiology, Department of Medicine, University of Colorado, Anschutz Medical Campus, USA
| | - Chelsea M. Magin
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, USA
- Division of Pulmonary Sciences & Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, USA
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2
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Mueller MC, Du Y, Walker LA, Magin CM. Dynamically stiffening biomaterials reveal age- and sex-specific differences in pulmonary arterial adventitial fibroblast activation. bioRxiv 2024:2023.05.11.540410. [PMID: 38168342 PMCID: PMC10760008 DOI: 10.1101/2023.05.11.540410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Respiratory diseases like pulmonary arterial hypertension (PAH) frequently exhibit sexual dimorphism. Female PAH patients are more susceptible to the disease but have increased survival rates. This phenomenon is known as the estrogen paradox, and the underlying mechanisms are not fully understood. During PAH progression in vivo , human pulmonary arterial adventitial fibroblasts (hPAAFs) differentiate into an activated phenotype. These cells produce excess, aberrant extracellular matrix proteins that stiffen the surrounding pulmonary arterial tissues. Here, we employed dynamic poly(ethylene glycol)-alpha methacrylate (PEGαMA)-based biomaterials to study how the age and sex of human serum influenced hPAAF activation in response to microenvironmental stiffening in vitro . Results showed female and male cells responded differently to increases in microenvironmental stiffness and serum composition. Male hPAAFs were less activated than female cells on soft hydrogels and more responsive to increases in microenvironmental stiffness regardless of serum composition. Female hPAAF activation followed this pattern only when cultured in younger (age < 50) female serum or when older (age ≥ 50) female serum was supplemented with estradiol. Otherwise, female hPAAF activation was relatively high on both soft and stiffened hydrogels, with little difference in activation between the two conditions. Collectively, these results suggest that it may be possible to model the estrogen paradox observed in PAH in vitro and that it is critical for researchers to report cell sex and serum source when conducting in vitro experimentation.
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3
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Montesi SB, Gomez CR, Beers M, Brown R, Chattopadhyay I, Flaherty KR, Garcia CK, Gomperts B, Hariri LP, Hogaboam CM, Jenkins RG, Kaminski N, Kim GHJ, Königshoff M, Kolb M, Kotton DN, Kropski JA, Lasky J, Magin CM, Maher TM, McCormick M, Moore BB, Nickerson-Nutter C, Oldham J, Podolanczuk AJ, Raghu G, Rosas I, Rowe SM, Schmidt WT, Schwartz D, Shore JE, Spino C, Craig JM, Martinez FJ. Pulmonary Fibrosis Stakeholder Summit: A Joint NHLBI, Three Lakes Foundation, and Pulmonary Fibrosis Foundation Workshop Report. Am J Respir Crit Care Med 2024; 209:362-373. [PMID: 38113442 PMCID: PMC10878386 DOI: 10.1164/rccm.202307-1154ws] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 12/19/2023] [Indexed: 12/21/2023] Open
Abstract
Despite progress in elucidation of disease mechanisms, identification of risk factors, biomarker discovery, and the approval of two medications to slow lung function decline in idiopathic pulmonary fibrosis and one medication to slow lung function decline in progressive pulmonary fibrosis, pulmonary fibrosis remains a disease with a high morbidity and mortality. In recognition of the need to catalyze ongoing advances and collaboration in the field of pulmonary fibrosis, the NHLBI, the Three Lakes Foundation, and the Pulmonary Fibrosis Foundation hosted the Pulmonary Fibrosis Stakeholder Summit on November 8-9, 2022. This workshop was held virtually and was organized into three topic areas: 1) novel models and research tools to better study pulmonary fibrosis and uncover new therapies, 2) early disease risk factors and methods to improve diagnosis, and 3) innovative approaches toward clinical trial design for pulmonary fibrosis. In this workshop report, we summarize the content of the presentations and discussions, enumerating research opportunities for advancing our understanding of the pathogenesis, treatment, and outcomes of pulmonary fibrosis.
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Affiliation(s)
| | - Christian R. Gomez
- Division of Lung Diseases, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
| | - Michael Beers
- Pulmonary and Critical Care Division, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Robert Brown
- Program in Neurotherapeutics, University of Massachusetts Chan Medical School, Worchester, Massachusetts
| | | | | | - Christine Kim Garcia
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University Irving Medical Center, New York, New York
| | | | - Lida P. Hariri
- Division of Pulmonary and Critical Care Medicine and
- Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts
| | - Cory M. Hogaboam
- Women’s Guild Lung Institute, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California
| | - R. Gisli Jenkins
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Naftali Kaminski
- Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Yale School of Medicine, New Haven, Connecticut
| | - Grace Hyun J. Kim
- Center for Computer Vision and Imaging Biomarkers, Department of Radiological Sciences, David Geffen School of Medicine, and
- Department of Biostatistics, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California
| | - Melanie Königshoff
- Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Martin Kolb
- Division of Respirology, McMaster University, Hamilton, Ontario, Canada
| | - Darrell N. Kotton
- Center for Regenerative Medicine, Boston University and Boston Medical Center, Boston, Massachusetts
| | - Jonathan A. Kropski
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Joseph Lasky
- Pulmonary Fibrosis Foundation, Chicago, Illinois
- Department of Medicine, Tulane University, New Orleans, Louisiana
| | - Chelsea M. Magin
- Department of Bioengineering
- Department of Pediatrics
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, and
| | - Toby M. Maher
- Keck School of Medicine, University of Southern California, Los Angeles, California
| | | | | | | | | | - Anna J. Podolanczuk
- Division of Pulmonary and Critical Care, Weill Cornell Medical College, New York, New York
| | - Ganesh Raghu
- Division of Pulmonary, Sleep and Critical Care Medicine, University of Washington, Seattle, Washington
| | - Ivan Rosas
- Pulmonary, Critical Care and Sleep Medicine, Baylor College of Medicine, Houston, Texas; and
| | - Steven M. Rowe
- Department of Medicine and
- Gregory Fleming James Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, Alabama
| | | | - David Schwartz
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | | | - Cathie Spino
- Department of Biostatistics, University of Michigan, Ann Arbor, Michigan
| | - J. Matthew Craig
- Division of Lung Diseases, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
| | - Fernando J. Martinez
- Division of Pulmonary and Critical Care, Weill Cornell Medical College, New York, New York
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4
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Blomberg R, Sompel K, Hauer C, Smith AJ, Peña B, Driscoll J, Hume PS, Merrick DT, Tennis MA, Magin CM. Hydrogel-Embedded Precision-Cut Lung Slices Model Lung Cancer Premalignancy Ex Vivo. Adv Healthc Mater 2024; 13:e2302246. [PMID: 37953708 PMCID: PMC10872976 DOI: 10.1002/adhm.202302246] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 10/17/2023] [Indexed: 11/14/2023]
Abstract
Lung cancer is the leading global cause of cancer-related deaths. Although smoking cessation is the best prevention, 50% of lung cancer diagnoses occur in people who have quit smoking. Research into treatment options for high-risk patients is constrained to rodent models, which are time-consuming, expensive, and require large cohorts. Embedding precision-cut lung slices (PCLS) within an engineered hydrogel and exposing this tissue to vinyl carbamate, a carcinogen from cigarette smoke, creates an in vitro model of lung cancer premalignancy. Hydrogel formulations are selected to promote early lung cancer cellular phenotypes and extend PCLS viability to six weeks. Hydrogel-embedded PCLS are exposed to vinyl carbamate, which induces adenocarcinoma in mice. Analysis of proliferation, gene expression, histology, tissue stiffness, and cellular content after six weeks reveals that vinyl carbamate induces premalignant lesions with a mixed adenoma/squamous phenotype. Putative chemoprevention agents diffuse through the hydrogel and induce tissue-level changes. The design parameters selected using murine tissue are validated with hydrogel-embedded human PCLS and results show increased proliferation and premalignant lesion gene expression patterns. This tissue-engineered model of human lung cancer premalignancy is the foundation for more sophisticated ex vivo models that enable the study of carcinogenesis and chemoprevention strategies.
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Affiliation(s)
- Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver |Anschutz, Aurora, CO, 80045, USA
| | - Kayla Sompel
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Caroline Hauer
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Alex J Smith
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Brisa Peña
- Department of Bioengineering, University of Colorado, Denver |Anschutz, Aurora, CO, 80045, USA
- Cardiovascular Institute & Adult Medical Genetics, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Jennifer Driscoll
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, CO, 80206, USA
| | - Patrick S Hume
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, CO, 80206, USA
| | - Daniel T Merrick
- Department of Pathology, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Meredith A Tennis
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver |Anschutz, Aurora, CO, 80045, USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO, 80045, USA
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5
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Vukmirovic M, Benam KH, Rose JJ, Turner S, Magin CM, Lagares D, Cohen AH, Kaminski N, Hirota JA, Maher TM, Konigshoff M, Mallampalli RK, Sheppard D, Tarran R, Gomer RH, Kenyon NJ, Morris D, Hobbie S, Raju SV, Petrache I, Watkins T, Kumar R, Lam WA, Sherer T, Hecker L. Challenges and Opportunities for Commercializing Technologies in the Pulmonary Arena: An Official American Thoracic Society Report. Ann Am Thorac Soc 2024; 21:1-11. [PMID: 37903340 PMCID: PMC10867911 DOI: 10.1513/annalsats.202310-872st] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 10/30/2023] [Indexed: 11/01/2023] Open
Abstract
"Translational medicine" has been a buzzword for over two decades. The concept was intended to be lofty, to reflect a new "bench-to-bedside" approach to basic and clinical research that would bridge fields, close gaps, accelerate innovation, and shorten the time and effort it takes to bring novel technologies from basic discovery to clinical application. Has this approach been successful and lived up to its promise? Despite incredible scientific advances and innovations developed within academia, successful clinical translation into real-world solutions has been difficult. This has been particularly challenging within the pulmonary field, because there have been fewer U.S. Food and Drug Administration-approved drugs and higher failure rates for pulmonary therapies than with other common disease areas. The American Thoracic Society convened a working group with the goal of identifying major challenges related to the commercialization of technologies within the pulmonary space and opportunities to enhance this process. A survey was developed and administered to 164 participants within the pulmonary arena. This report provides a summary of these survey results. Importantly, this report identifies a number of poorly recognized challenges that exist in pulmonary academic settings, which likely contribute to diminished efficiency of commercialization efforts, ultimately hindering the rate of successful clinical translation. Because many innovations are initially developed in academic settings, this is a global public health issue that impacts the entire American Thoracic Society community. This report also summarizes key resources and opportunities and provides recommendations to enhance successful commercialization of pulmonary technologies.
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Tanneberger AE, Blair L, Davis-Hall D, Magin CM. 3D Bioprinting Phototunable Hydrogels to Study Fibroblast Activation. J Vis Exp 2023. [PMID: 37458469 DOI: 10.3791/65639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023] Open
Abstract
Phototunable hydrogels can transform spatially and temporally in response to light exposure. Incorporating these types of biomaterials in cell-culture platforms and dynamically triggering changes, such as increasing microenvironmental stiffness, enables researchers to model changes in the extracellular matrix (ECM) that occur during fibrotic disease progression. Herein, a method is presented for 3D bioprinting a phototunable hydrogel biomaterial capable of two sequential polymerization reactions within a gelatin support bath. The technique of Freeform Reversible Embedding of Suspended Hydrogels (FRESH) bioprinting was adapted by adjusting the pH of the support bath to facilitate a Michael addition reaction. First, the bioink containing poly(ethylene glycol)-alpha methacrylate (PEGαMA) was reacted off-stoichiometry with a cell-degradable crosslinker to form soft hydrogels. These soft hydrogels were later exposed to photoinitator and light to induce the homopolymerization of unreacted groups and stiffen the hydrogel. This protocol covers hydrogel synthesis, 3D bioprinting, photostiffening, and endpoint characterizations to assess fibroblast activation within 3D structures. The method presented here enables researchers to 3D bioprint a variety of materials that undergo pH-catalyzed polymerization reactions and could be implemented to engineer various models of tissue homeostasis, disease, and repair.
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Affiliation(s)
- Alicia E Tanneberger
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus
| | - Layla Blair
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus
| | - Duncan Davis-Hall
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus; Department of Pediatrics, University of Colorado Anschutz Medical Campus; Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus;
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7
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Hewawasam RS, Blomberg R, Šerbedžija P, Magin CM. Chemical Modification of Human Decellularized Extracellular Matrix for Incorporation into Phototunable Hybrid-Hydrogel Models of Tissue Fibrosis. ACS Appl Mater Interfaces 2023; 15:15071-15083. [PMID: 36917510 DOI: 10.1021/acsami.2c18330] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [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: 06/01/2023]
Abstract
Tissue fibrosis remains a serious health condition with high morbidity and mortality rates. There is a critical need to engineer model systems that better recapitulate the spatial and temporal changes in the fibrotic extracellular microenvironment and enable study of the cellular and molecular alterations that occur during pathogenesis. Here, we present a process for chemically modifying human decellularized extracellular matrix (dECM) and incorporating it into a dynamically tunable hybrid-hydrogel system containing a poly(ethylene glycol)-α methacrylate (PEGαMA) backbone. Following modification and characterization, an off-stoichiometry thiol-ene Michael addition reaction resulted in hybrid-hydrogels with mechanical properties that could be tuned to recapitulate many healthy tissue types. Next, photoinitiated, free-radical homopolymerization of excess α-methacrylates increased crosslinking density and hybrid-hydrogel elastic modulus to mimic a fibrotic microenvironment. The incorporation of dECM into the PEGαMA hydrogel decreased the elastic modulus and, relative to fully synthetic hydrogels, increased the swelling ratio, the average molecular weight between crosslinks, and the mesh size of hybrid-hydrogel networks. These changes were proportional to the amount of dECM incorporated into the network. Dynamic stiffening increased the elastic modulus and decreased the swelling ratio, average molecular weight between crosslinks, and the mesh size of hybrid-hydrogels, as expected. Stiffening also activated human fibroblasts, as measured by increases in average cellular aspect ratio (1.59 ± 0.02 to 2.98 ± 0.20) and expression of α-smooth muscle actin (αSMA). Fibroblasts expressing αSMA increased from 25.8 to 49.1% upon dynamic stiffening, demonstrating that hybrid-hydrogels containing human dECM support investigation of dynamic mechanosensing. These results improve our understanding of the biomolecular networks formed within hybrid-hydrogels: this fully human phototunable hybrid-hydrogel system will enable researchers to control and decouple the biochemical changes that occur during fibrotic pathogenesis from the resulting increases in stiffness to study the dynamic cell-matrix interactions that perpetuate fibrotic diseases.
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Affiliation(s)
- Rukshika S Hewawasam
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
| | - Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
| | - Predrag Šerbedžija
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
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8
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Blomberg R, Sompel K, Hauer C, Pe A B, Driscoll J, Hume PS, Merrick DT, Tennis MA, Magin CM. Tissue-engineered models of lung cancer premalignancy. bioRxiv 2023:2023.03.15.532835. [PMID: 36993773 PMCID: PMC10055140 DOI: 10.1101/2023.03.15.532835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Lung cancer is the leading global cause of cancer-related deaths. Although smoking cessation is the best preventive action, nearly 50% of all lung cancer diagnoses occur in people who have already quit smoking. Research into treatment options for these high-risk patients has been constrained to rodent models of chemical carcinogenesis, which are time-consuming, expensive, and require large numbers of animals. Here we show that embedding precision-cut lung slices within an engineered hydrogel and exposing this tissue to a carcinogen from cigarette smoke creates an in vitro model of lung cancer premalignancy. Hydrogel formulations were selected to promote early lung cancer cellular phenotypes and extend PCLS viability up to six weeks. In this study, hydrogel-embedded lung slices were exposed to the cigarette smoke derived carcinogen vinyl carbamate, which induces adenocarcinoma in mice. At six weeks, analysis of proliferation, gene expression, histology, tissue stiffness, and cellular content revealed that vinyl carbamate induced the formation of premalignant lesions with a mixed adenoma/squamous phenotype. Two putative chemoprevention agents were able to freely diffuse through the hydrogel and induce tissue-level changes. The design parameters selected using murine tissue were validated with hydrogel-embedded human PCLS and results showed increased proliferation and premalignant lesion gene expression patterns. This tissue-engineered model of human lung cancer premalignancy is the starting point for more sophisticated ex vivo models and a foundation for the study of carcinogenesis and chemoprevention strategies.
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9
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Da Palma RK, Uriarte JJ, Magin CM. Editorial: Unraveling the physiology of cells and extracellular matrix: Techniques for biochemical and biophysical characterization. Front Physiol 2023; 13:1123223. [PMID: 36685203 PMCID: PMC9846733 DOI: 10.3389/fphys.2022.1123223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 01/06/2023] Open
Affiliation(s)
- Renata Kelly Da Palma
- Facultad De Ciencias De la Salud de Manresa, Universitat de Vic-Universitat Central De Catalunya (UVic-UCC), Barcelona, Spain
- Human Movement and Rehabilitation, Post-Graduate Program Medical School, Evangelic University of Goiás-UniEVANGÉLICA, Anápolis, Brazil
| | - Juan Jose Uriarte
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, KY, United States
| | - Chelsea M. Magin
- Department of Bioengineering, University of Colorado, Denver | Anschutz, Aurora, CO, United States
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO, United States
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, United States
- *Correspondence: Chelsea M. Magin,
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10
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Tanneberger AE, Weiss DJ, Magin CM. An Introduction to Engineering and Modeling the Lung. Adv Exp Med Biol 2023; 1413:1-13. [PMID: 37195523 DOI: 10.1007/978-3-031-26625-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Over the last decade, the field of lung biology has evolved considerably due to many advancements, including the advent of single-cell RNA (scRNA) sequencing, induced pluripotent stem cell (iPSC) reprogramming, and 3D cell and tissue culture. Despite rigorous research and tireless efforts, chronic pulmonary diseases remain the third leading cause of death globally, with transplantation being the only option for treating end-stage disease. This chapter will introduce the broader impacts of understanding lung biology in health and disease, provide an overview of lung physiology and pathophysiology, and summarize the key takeaways from each chapter describing engineering translational models of lung homeostasis and disease. This book is divided into broad topic areas containing chapters covering basic biology, engineering approaches, and clinical perspectives related to (1) the developing lung, (2) the large airways, (3) the mesenchyme and parenchyma, (4) the pulmonary vasculature, and (5) the interface between lungs and medical devices. Each section highlights the underlying premise that engineering strategies, when applied in collaboration with cell biologists and pulmonary physicians, will address critical challenges in pulmonary health care.
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Affiliation(s)
- Alicia E Tanneberger
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Daniel J Weiss
- Department of Medicine, University of Vermont, Larner College of Medicine, Burlington, VT, USA
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA.
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA.
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA.
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11
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Blomberg R, Hewawasam RS, Šerbedžija P, Saleh K, Caracena T, Magin CM. Engineering Dynamic 3D Models of Lung. Adv Exp Med Biol 2023; 1413:155-189. [PMID: 37195531 DOI: 10.1007/978-3-031-26625-6_9] [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] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The lung parenchyma-consisting of gas-filled alveoli, vasculature, and connective tissue-is the site for gas exchange in the lung and plays a critical role in a number of chronic lung diseases. In vitro models of lung parenchyma can, therefore, provide valuable platforms for the study of lung biology in health and disease. Yet modeling such a complex tissue requires integrating multiple components, including biochemical cues from the extracellular environment, geometrically defined multicellular interactions, and dynamic mechanical inputs such as the cyclic stretch of breathing. In this chapter, we provide an overview of the broad spectrum of model systems that have been developed to recapitulate one or more features of lung parenchyma, and some of the scientific advances generated by those models. We discuss the use of both synthetic and naturally derived hydrogel materials, precision-cut lung slices, organoids, and lung-on-a-chip devices, with perspectives on the strengths, weaknesses, and potential future directions of these engineered systems.
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Affiliation(s)
- Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Rukshika S Hewawasam
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Predrag Šerbedžija
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Kamiel Saleh
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Thomas Caracena
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, Aurora, CO, USA.
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA.
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA.
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12
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Davis-Hall D, Thomas E, Peña B, Magin CM. 3D-bioprinted, phototunable hydrogel models for studying adventitial fibroblast activation in pulmonary arterial hypertension. Biofabrication 2022; 15:10.1088/1758-5090/aca8cf. [PMID: 36533728 PMCID: PMC9933849 DOI: 10.1088/1758-5090/aca8cf] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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] [Received: 03/23/2022] [Accepted: 12/05/2022] [Indexed: 12/10/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a progressive disease of the lung vasculature, characterized by elevated pulmonary blood pressure, remodeling of the pulmonary arteries, and ultimately right ventricular failure. Therapeutic interventions for PAH are limited in part by the lack ofin vitroscreening platforms that accurately reproduce dynamic arterial wall mechanical properties. Here we present a 3D-bioprinted model of the pulmonary arterial adventitia comprised of a phototunable poly(ethylene glycol) alpha methacrylate (PEG-αMA)-based hydrogel and primary human pulmonary artery adventitia fibroblasts (HPAAFs). This unique biomaterial emulates PAH pathogenesisin vitrothrough a two-step polymerization reaction. First, PEG-αMA macromer was crosslinked off-stoichiometry by 3D bioprinting an acidic bioink solution into a basic gelatin support bath initiating a base-catalyzed thiol-ene reaction with synthetic and biodegradable crosslinkers. Then, matrix stiffening was induced by photoinitiated homopolymerization of unreacted αMA end groups. A design of experiments approach produced a hydrogel platform that exhibited an initial elastic modulus (E) within the range of healthy pulmonary arterial tissue (E= 4.7 ± 0.09 kPa) that was stiffened to the pathologic range of hypertensive tissue (E= 12.8 ± 0.47 kPa) and supported cellular proliferation over time. A higher percentage of HPAAFs cultured in stiffened hydrogels expressed the fibrotic marker alpha-smooth muscle actin than cells in soft hydrogels (88 ± 2% versus 65 ± 4%). Likewise, a greater percentage of HPAAFs were positive for the proliferation marker 5-ethynyl-2'-deoxyuridine (EdU) in stiffened models (66 ± 6%) compared to soft (39 ± 6%). These results demonstrate that 3D-bioprinted, phototunable models of pulmonary artery adventitia are a tool that enable investigation of fibrotic pathogenesisin vitro.
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Affiliation(s)
- Duncan Davis-Hall
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, United States of America
| | - Emily Thomas
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
| | - Brisa Peña
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, United States of America
- CU-Cardiovascular Institute, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, United States of America
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, United States of America
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13
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Caracena T, Blomberg R, Hewawasam RS, Fry ZE, Riches DWH, Magin CM. Alveolar epithelial cells and microenvironmental stiffness synergistically drive fibroblast activation in three-dimensional hydrogel lung models. Biomater Sci 2022; 10:7133-7148. [PMID: 36366982 PMCID: PMC9729409 DOI: 10.1039/d2bm00827k] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating lung disease that progressively and irreversibly alters the lung parenchyma, eventually leading to respiratory failure. The study of this disease has been historically challenging due to the myriad of complex processes that contribute to fibrogenesis and the inherent difficulty in accurately recreating the human pulmonary environment in vitro. Here, we describe a poly(ethylene glycol) PEG hydrogel-based three-dimensional model for the co-culture of primary murine pulmonary fibroblasts and alveolar epithelial cells that reproduces the micro-architecture, cell placement, and mechanical properties of healthy and fibrotic lung tissue. Co-cultured cells retained normal levels of viability up to at least three weeks and displayed differentiation patterns observed in vivo during IPF progression. Interrogation of protein and gene expression within this model showed that myofibroblast activation required both extracellular mechanical cues and the presence of alveolar epithelial cells. Differences in gene expression indicated that cellular co-culture induced TGF-β signaling and proliferative gene expression, while microenvironmental stiffness upregulated the expression of genes related to cell-ECM interactions. This biomaterial-based cell culture system serves as a significant step forward in the accurate recapitulation of human lung tissue in vitro and highlights the need to incorporate multiple factors that work together synergistically in vivo into models of lung biology of health and disease.
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Affiliation(s)
- Thomas Caracena
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA.
| | - Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA.
| | - Rukshika S Hewawasam
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA.
| | - Zoe E Fry
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA.
| | - David W H Riches
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, USA
- Department of Research, Veterans Affairs Eastern Colorado Health Care System, USA
- Department of Immunology and Microbiology, University of Colorado, Anschutz Medical Campus, USA
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, USA.
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, USA
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, USA
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14
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Saleh KS, Hewawasam R, Šerbedžija P, Blomberg R, Noreldeen SE, Edelman B, Smith BJ, Riches DWH, Magin CM. Engineering Hybrid-Hydrogels Comprised of Healthy or Diseased Decellularized Extracellular Matrix to Study Pulmonary Fibrosis. Cell Mol Bioeng 2022; 15:505-519. [PMID: 36444345 PMCID: PMC9700547 DOI: 10.1007/s12195-022-00726-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/10/2022] [Indexed: 11/25/2022] Open
Abstract
Idiopathic pulmonary fibrosis is a chronic disease characterized by progressive lung scarring that inhibits gas exchange. Evidence suggests fibroblast-matrix interactions are a prominent driver of disease. However, available preclinical models limit our ability to study these interactions. We present a technique for synthesizing phototunable poly(ethylene glycol) (PEG)-based hybrid-hydrogels comprising healthy or fibrotic decellularized extracellular matrix (dECM) to decouple mechanical properties from composition and elucidate their roles in fibroblast activation. Here, we engineered and characterized phototunable hybrid-hydrogels using molecular techniques such as ninhydrin and Ellman's assays to assess dECM functionalization, and parallel-plate rheology to measure hydrogel mechanical properties. These biomaterials were employed to investigate the activation of fibroblasts from dual-transgenic Col1a1-GFP and αSMA-RFP reporter mice in response to changes in composition and mechanical properties. We show that reacting functionalized dECM from healthy or bleomycin-injured mouse lungs with PEG alpha-methacrylate (αMA) in an off-stoichiometry Michael-addition reaction created soft hydrogels mimicking a healthy lung elastic modulus (4.99 ± 0.98 kPa). Photoinitiated stiffening increased the material modulus to fibrotic values (11.48 ± 1.80 kPa). Percent activation of primary murine fibroblasts expressing Col1a1 and αSMA increased by approximately 40% following dynamic stiffening of both healthy and bleomycin hybrid-hydrogels. There were no significant differences between fibroblast activation on stiffened healthy versus stiffened bleomycin-injured hybrid-hydrogels. Phototunable hybrid-hydrogels provide an important platform for probing cell-matrix interactions and developing a deeper understanding of fibrotic activation in pulmonary fibrosis. Our results suggest that mechanical properties are a more significant contributor to fibroblast activation than biochemical composition within the scope of the hybrid-hydrogel platform evaluated in this study. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-022-00726-y.
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Affiliation(s)
- Kamiel S. Saleh
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
| | - Rukshika Hewawasam
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
| | - Predrag Šerbedžija
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
| | - Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
| | - Saif E. Noreldeen
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
| | - Benjamin Edelman
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO USA
| | - Bradford J. Smith
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO USA
| | - David W. H. Riches
- Program in Cell Biology, Department of Pediatrics, National Jewish Health, Denver, CO USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO USA
- Department of Research, Veterans Affairs Eastern Colorado Health Care System, Aurora, CO USA
- Department of Immunology and Microbiology, University of Colorado, Anschutz Medical Campus, Aurora, CO USA
| | - Chelsea M. Magin
- Department of Bioengineering, University of Colorado, Denver | Anschutz Medical Campus, 2115 N Scranton Street, Suite 3010, Aurora, CO 80045 USA
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO USA
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, CO USA
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15
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Stancil IT, Michalski JE, Davis-Hall D, Chu HW, Park JA, Magin CM, Yang IV, Smith BJ, Dobrinskikh E, Schwartz DA. Pulmonary fibrosis distal airway epithelia are dynamically and structurally dysfunctional. Nat Commun 2021; 12:4566. [PMID: 34315881 PMCID: PMC8316442 DOI: 10.1038/s41467-021-24853-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 07/06/2021] [Indexed: 01/06/2023] Open
Abstract
The airway epithelium serves as the interface between the host and external environment. In many chronic lung diseases, the airway is the site of substantial remodeling after injury. While, idiopathic pulmonary fibrosis (IPF) has traditionally been considered a disease of the alveolus and lung matrix, the dominant environmental (cigarette smoking) and genetic (gain of function MUC5B promoter variant) risk factor primarily affect the distal airway epithelium. Moreover, airway-specific pathogenic features of IPF include bronchiolization of the distal airspace with abnormal airway cell-types and honeycomb cystic terminal airway-like structures with concurrent loss of terminal bronchioles in regions of minimal fibrosis. However, the pathogenic role of the airway epithelium in IPF is unknown. Combining biophysical, genetic, and signaling analyses of primary airway epithelial cells, we demonstrate that healthy and IPF airway epithelia are biophysically distinct, identifying pathologic activation of the ERBB-YAP axis as a specific and modifiable driver of prolongation of the unjammed-to-jammed transition in IPF epithelia. Furthermore, we demonstrate that this biophysical state and signaling axis correlates with epithelial-driven activation of the underlying mesenchyme. Our data illustrate the active mechanisms regulating airway epithelial-driven fibrosis and identify targets to modulate disease progression.
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Affiliation(s)
- Ian T Stancil
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Jacob E Michalski
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Duncan Davis-Hall
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, USA
| | - Hong Wei Chu
- Department of Medicine, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Department of Medicine, National Jewish Health, Denver, CO, USA
| | - Jin-Ah Park
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, USA
- Department of Medicine, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Ivana V Yang
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Bradford J Smith
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, USA
- Department of Pediatrics, Division of Pediatric Pulmonary and Sleep Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Evgenia Dobrinskikh
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - David A Schwartz
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
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16
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Campbell DR, Senger CN, Ryan AL, Magin CM. Engineering Tissue-Informed Biomaterials to Advance Pulmonary Regenerative Medicine. Front Med (Lausanne) 2021; 8:647834. [PMID: 33898484 PMCID: PMC8060451 DOI: 10.3389/fmed.2021.647834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 03/09/2021] [Indexed: 11/13/2022] Open
Abstract
Biomaterials intentionally designed to support the expansion, differentiation, and three-dimensional (3D) culture of induced-pluripotent stem cells (iPSCs) may pave the way to cell-based therapies for chronic respiratory diseases. These conditions are endured by millions of people worldwide and represent a significant cause of morbidity and mortality. Currently, there are no effective treatments for the majority of advanced lung diseases and lung transplantation remains the only hope for many chronically ill patients. Key opinion leaders speculate that the novel coronavirus, COVID-19, may lead to long-term lung damage, further exacerbating the need for regenerative therapies. New strategies for regenerative cell-based therapies harness the differentiation capability of human iPSCs for studying pulmonary disease pathogenesis and treatment. Excitingly, biomaterials are a cell culture platform that can be precisely designed to direct stem cell differentiation. Here, we present a closer look at the state-of-the-art of iPSC differentiation for pulmonary engineering, offer evidence supporting the power of biomaterials to improve stem cell differentiation, and discuss our perspective on the potential for tissue-informed biomaterials to transform pulmonary regenerative medicine.
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Affiliation(s)
- Donald R. Campbell
- Department of Bioengineering, Denver, Anschutz Medical Campus, University of Colorado, Aurora, CO, United States
| | - Christiana N. Senger
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Hastings Center for Pulmonary Research, University of Southern California, Los Angeles, CA, United States
| | - Amy L. Ryan
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Hastings Center for Pulmonary Research, University of Southern California, Los Angeles, CA, United States
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, CA, United States
| | - Chelsea M. Magin
- Department of Bioengineering, Denver, Anschutz Medical Campus, University of Colorado, Aurora, CO, United States
- Department of Pediatrics, Anschutz Medical Campus, University of Colorado, Aurora, CO, United States
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, Anschutz Medical Campus, University of Colorado, Aurora, CO, United States
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17
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Morgan LE, Jaramillo AM, Shenoy SK, Raclawska D, Emezienna NA, Richardson VL, Hara N, Harder AQ, NeeDell JC, Hennessy CE, El-Batal HM, Magin CM, Grove Villalon DE, Duncan G, Hanes JS, Suk JS, Thornton DJ, Holguin F, Janssen WJ, Thelin WR, Evans CM. Disulfide disruption reverses mucus dysfunction in allergic airway disease. Nat Commun 2021; 12:249. [PMID: 33431872 PMCID: PMC7801631 DOI: 10.1038/s41467-020-20499-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/20/2020] [Indexed: 01/04/2023] Open
Abstract
Airway mucus is essential for lung defense, but excessive mucus in asthma obstructs airflow, leading to severe and potentially fatal outcomes. Current asthma treatments have minimal effects on mucus, and the lack of therapeutic options stems from a poor understanding of mucus function and dysfunction at a molecular level and in vivo. Biophysical properties of mucus are controlled by mucin glycoproteins that polymerize covalently via disulfide bonds. Once secreted, mucin glycopolymers can aggregate, form plugs, and block airflow. Here we show that reducing mucin disulfide bonds disrupts mucus in human asthmatics and reverses pathological effects of mucus hypersecretion in a mouse allergic asthma model. In mice, inhaled mucolytic treatment loosens mucus mesh, enhances mucociliary clearance, and abolishes airway hyperreactivity (AHR) to the bronchoprovocative agent methacholine. AHR reversal is directly related to reduced mucus plugging. These findings establish grounds for developing treatments to inhibit effects of mucus hypersecretion in asthma.
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Affiliation(s)
- Leslie E Morgan
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Ana M Jaramillo
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Siddharth K Shenoy
- Center for Nanomedicine at the Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dorota Raclawska
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Nkechinyere A Emezienna
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA.,Department of Obstetrics and Gynecology, Howard University College of Medicine, Washington, DC, USA
| | - Vanessa L Richardson
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Naoko Hara
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Anna Q Harder
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - James C NeeDell
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Corinne E Hennessy
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - Hassan M El-Batal
- Department of Bioengineering, College of Engineering, Design, and Computing, University of Colorado, Denver
- Anschutz Medial Campus, Denver, CO, USA
| | - Chelsea M Magin
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA.,Department of Bioengineering, College of Engineering, Design, and Computing, University of Colorado, Denver
- Anschutz Medial Campus, Denver, CO, USA
| | | | - Gregg Duncan
- Center for Nanomedicine at the Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Fischell Department of Bioengineering, School of Engineering University of Maryland, College Park, MD, USA
| | - Justin S Hanes
- Center for Nanomedicine at the Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Pharmacology & Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Jung Soo Suk
- Center for Nanomedicine at the Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - David J Thornton
- Wellcome Trust Centre for Cell-Matrix Research and the Lydia Becker Institute of Immunology and Inflammation, School of Biological Sciences, The University of Manchester, Manchester, UK
| | - Fernando Holguin
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA
| | - William J Janssen
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA.,Department of Medicine National Jewish Health, Denver, CO, USA.,Department of Immunology and Microbiology, School of Medicine, University of Colorado, Aurora, CO, USA
| | | | - Christopher M Evans
- Department of Medicine, School of Medicine, University of Colorado, Aurora, CO, USA. .,Department of Immunology and Microbiology, School of Medicine, University of Colorado, Aurora, CO, USA.
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18
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Wagner DE, Ikonomou L, Gilpin SE, Magin CM, Cruz F, Greaney A, Magnusson M, Chen YW, Davis B, Vanuytsel K, Rolandsson Enes S, Krasnodembskaya A, Lehmann M, Westergren-Thorsson G, Stegmayr J, Alsafadi HN, Hoffman ET, Weiss DJ, Ryan AL. Stem Cells, Cell Therapies, and Bioengineering in Lung Biology and Disease 2019. ERJ Open Res 2020; 6:00123-2020. [PMID: 33123557 PMCID: PMC7569162 DOI: 10.1183/23120541.00123-2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 07/31/2020] [Indexed: 12/13/2022] Open
Abstract
A workshop entitled "Stem Cells, Cell Therapies and Bioengineering in Lung Biology and Diseases" was hosted by the University of Vermont Larner College of Medicine in collaboration with the National Heart, Lung and Blood Institute, the Alpha-1 Foundation, the Cystic Fibrosis Foundation, the International Society for Cell and Gene Therapy and the Pulmonary Fibrosis Foundation. The event was held from July 15 to 18, 2019 at the University of Vermont, Burlington, Vermont. The objectives of the conference were to review and discuss the current status of the following active areas of research: 1) technological advancements in the analysis and visualisation of lung stem and progenitor cells; 2) evaluation of lung stem and progenitor cells in the context of their interactions with the niche; 3) progress toward the application and delivery of stem and progenitor cells for the treatment of lung diseases such as cystic fibrosis; 4) progress in induced pluripotent stem cell models and application for disease modelling; and 5) the emerging roles of cell therapy and extracellular vesicles in immunomodulation of the lung. This selection of topics represents some of the most dynamic research areas in which incredible progress continues to be made. The workshop also included active discussion on the regulation and commercialisation of regenerative medicine products and concluded with an open discussion to set priorities and recommendations for future research directions in basic and translation lung biology.
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Affiliation(s)
- Darcy E. Wagner
- Lung Bioengineering and Regeneration, Dept of Experimental Medicine, Wallenberg Center for Molecular Medicine and Lund Stem Cell Center, Faculty of Medicine, Lund University, Lund, Sweden
- These authors contributed equally
| | - Laertis Ikonomou
- Center for Regenerative Medicine, Boston University and Boston Medical Center, Boston, MA, USA
- These authors contributed equally
| | - Sarah E. Gilpin
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA, USA
| | - Chelsea M. Magin
- Depts of Medicine and Bioengineering, University of Colorado, Denver, Aurora, CO, USA
| | - Fernanda Cruz
- Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Allison Greaney
- Dept of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Mattias Magnusson
- Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Lund, Sweden
| | - Ya-Wen Chen
- Hastings Center for Pulmonary Research, Dept of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Brian Davis
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
| | - Kim Vanuytsel
- Center for Regenerative Medicine, Boston University and Boston Medical Center, Boston, MA, USA
| | - Sara Rolandsson Enes
- Dept of Medicine, University of Vermont, Burlington, VT, USA
- Dept of Experimental Medical Science, Division of Lung Biology, Lund University, Lund, Sweden
| | | | - Mareike Lehmann
- Comprehensive Pneumology Center, Lung Repair and Regeneration Unit, Helmholtz Center Munich, Munich, Germany
| | | | - John Stegmayr
- Lung Bioengineering and Regeneration, Dept of Experimental Medicine, Wallenberg Center for Molecular Medicine and Lund Stem Cell Center, Faculty of Medicine, Lund University, Lund, Sweden
| | - Hani N. Alsafadi
- Lung Bioengineering and Regeneration, Dept of Experimental Medicine, Wallenberg Center for Molecular Medicine and Lund Stem Cell Center, Faculty of Medicine, Lund University, Lund, Sweden
| | - Evan T. Hoffman
- Dept of Medicine, University of Vermont, Burlington, VT, USA
| | - Daniel J. Weiss
- Dept of Medicine, University of Vermont, Burlington, VT, USA
| | - Amy L. Ryan
- Hastings Center for Pulmonary Research, Dept of Medicine, University of Southern California, Los Angeles, CA, USA
- Dept of Stem Cell and Regenerative Medicine, University of Southern California, Los Angeles, CA, USA
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19
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Petrou CL, D'Ovidio TJ, Bölükbas DA, Tas S, Brown RD, Allawzi A, Lindstedt S, Nozik-Grayck E, Stenmark KR, Wagner DE, Magin CM. Clickable decellularized extracellular matrix as a new tool for building hybrid-hydrogels to model chronic fibrotic diseases in vitro. J Mater Chem B 2020; 8:6814-6826. [PMID: 32343292 PMCID: PMC9020195 DOI: 10.1039/d0tb00613k] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Fibrotic disorders account for over one third of mortalities worldwide. Despite great efforts to study the cellular and molecular processes underlying fibrosis, there are currently few effective therapies. Dual-stage polymerization reactions are an innovative tool for recreating heterogeneous increases in extracellular matrix (ECM) modulus, a hallmark of fibrotic diseases in vivo. Here, we present a clickable decellularized ECM (dECM) crosslinker incorporated into a dynamically responsive poly(ethylene glycol)-α-methacrylate (PEGαMA) hybrid-hydrogel to recreate ECM remodeling in vitro. An off-stoichiometry thiol-ene Michael addition between PEGαMA (8-arm, 10 kg mol-1) and the clickable dECM resulted in hydrogels with an elastic modulus of E = 3.6 ± 0.24 kPa, approximating healthy lung tissue (1-5 kPa). Next, residual αMA groups were reacted via a photo-initiated homopolymerization to increase modulus values to fibrotic levels (E = 13.4 ± 0.82 kPa) in situ. Hydrogels with increased elastic moduli, mimicking fibrotic ECM, induced a significant increase in the expression of myofibroblast transgenes. The proportion of primary fibroblasts from dual-reporter mouse lungs expressing collagen 1a1 and alpha-smooth muscle actin increased by approximately 60% when cultured on stiff and dynamically stiffened hybrid-hydrogels compared to soft. Likewise, fibroblasts expressed significantly increased levels of the collagen 1a1 transgene on stiff regions of spatially patterned hybrid-hydrogels compared to the soft areas. Collectively, these results indicate that hybrid-hydrogels are a new tool that can be implemented to spatiotemporally induce a phenotypic transition in primary murine fibroblasts in vitro.
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Affiliation(s)
- Cassandra L Petrou
- Department of Bioengineering, University of Colorado, Anschutz Medical Campus, 12700 E 19th Ave MS C272 Aurora, Denver, CO 80045, USA
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20
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Bailey KE, Pino C, Lennon ML, Lyons A, Jacot JG, Lammers SR, Königshoff M, Magin CM. Embedding of Precision-Cut Lung Slices in Engineered Hydrogel Biomaterials Supports Extended Ex Vivo Culture. Am J Respir Cell Mol Biol 2020; 62:14-22. [PMID: 31513744 PMCID: PMC6938134 DOI: 10.1165/rcmb.2019-0232ma] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 09/12/2019] [Indexed: 01/03/2023] Open
Abstract
Maintaining the three-dimensional architecture and cellular complexity of lung tissue ex vivo can enable elucidation of the cellular and molecular pathways underlying chronic pulmonary diseases. Precision-cut lung slices (PCLS) are one human-lung model with the potential to support critical mechanistic studies and early drug discovery. However, many studies report short culture times of 7-10 days. Here, we systematically evaluated poly(ethylene glycol)-based hydrogel platforms for the encapsulation of PCLS. We demonstrated the ability to support ex vivo culture of embedded PCLS for at least 21 days compared with control PCLS floating in media. These customized hydrogels maintained PCLS architecture (no difference), viability (4.7-fold increase, P < 0.0001), and cellular phenotype as measured by SFTPC (1.8-fold increase, P < 0.0001) and vimentin expression (no change) compared with nonencapsulated controls. Collectively, these results demonstrate that hydrogel biomaterials support the extended culture times required to study chronic pulmonary diseases ex vivo using PCLS technology.
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Affiliation(s)
- Kolene E. Bailey
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and
| | - Christopher Pino
- Department of Bioengineering, University of Colorado, Aurora, Colorado
| | - Mallory L. Lennon
- Department of Bioengineering, University of Colorado, Aurora, Colorado
| | - Anne Lyons
- Department of Bioengineering, University of Colorado, Aurora, Colorado
| | - Jeffrey G. Jacot
- Department of Bioengineering, University of Colorado, Aurora, Colorado
| | - Steven R. Lammers
- Department of Bioengineering, University of Colorado, Aurora, Colorado
| | - Melanie Königshoff
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and
| | - Chelsea M. Magin
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and
- Department of Bioengineering, University of Colorado, Aurora, Colorado
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D’Ovidio TJ, Friederich ARW, de Herrera N, Davis-Hall D, Mann EE, Magin CM. Micropattern-mediated apical guidance accelerates epithelial cell migration to improve healing around percutaneous gastrostomy tubes. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/ab50d5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
Hypergranulation, bacterial infection, and device dislodgment are common complications associated with percutaneous gastronomy (PG) tube placement for enteral feeding largely attributable to delayed stoma tract maturation around the device. Stoma tract maturation is a wound-healing process that requires collective and complete migration of an advancing epithelial layer. While it is widely accepted that micropatterned surfaces enhance cell migration when cells are cultured directly on the substrate, few studies have investigated the influence of apical contact guidance from micropatterned surfaces on cell migration, as occurs during stoma tract formation. Here, we developed 2D and 3D in vitro epithelial cell migration assays to test the effect of various Sharklet micropatterns on apically-guided cell migration. The 2D modified scratch wound assay identified a Sharklet micropattern (+10SK50×50) that enhanced apical cell migration by 4-fold (p = 0.0105) compared to smooth controls over the course of seven days. The best-performing micropattern was then applied to cylindrical prototypes with the same outer diameter as a pediatric PG tube. These prototypes were evaluated in the novel 3D migration assay where magnetic levitation aggregated cells around prototypes to create an artificial stoma. Results indicated a 50% increase (p < 0.0001) in cell migration after seven days along Sharklet-micropatterned prototypes compared to smooth controls. The Sharklet micropattern enhanced apically-guided epithelial cell migration in both 2D and 3D in vitro assays. These data suggest that the incorporation of a Sharklet micropattern onto the surface of a PG tube may accelerate cell migration via apical contact, improve stoma tract maturation, and reduce skin-associated complications.
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Davis-Hall D, Nguyen V, D'Ovidio TJ, Tsai E, Bilousova G, Magin CM. Peptide-Functionalized Hydrogels Modulate Integrin Expression and Stemness in Adult Human Epidermal Keratinocytes. ACTA ACUST UNITED AC 2019; 3:e1900022. [PMID: 32648724 DOI: 10.1002/adbi.201900022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 02/18/2019] [Revised: 06/20/2019] [Indexed: 01/18/2023]
Abstract
The extracellular matrix (ECM) controls keratinocyte proliferation, migration, and differentiation through β-integrin signaling. Wound-healing research requires expanding cells in vitro while maintaining replicative capacity; however, early terminal differentiation under traditional culture conditions limits expansion. Here, a design of experiments approach identifies poly(ethylene glycol)-based hydrogel formulations with mechanical properties (elastic modulus, E = 20.9 ± 0.56 kPa) and bioactive peptide sequences that mimic the epidermal ECM. These hydrogels enable systematic investigation of the influence of cell-binding domains from fibronectin (RGDS), laminin (YIGSR), and collagen IV (HepIII) on keratinocyte stemness and β1 integrin expression. Quantification of 14-day keratin protein expression shows four hydrogels improve stemness compared to standard techniques. Three hydrogels increase β1 integrin expression, demonstrating a positive linear relationship between stemness and β1 integrin expression. Multifactorial statistical analysis predicts an optimal peptide combination ([RGDS] = 0.67 mm, [YIGSR] = 0.13 mm, and [HepIII] = 0.02 mm) for maintaining stemness in vitro. Best-performing hydrogels exhibit no decrease in Ki-67-positive cells compared to standards (15% decrease, day 7 to 14; p < 0.05, Tukey Test). These data demonstrate that precisely designed hydrogel biomaterials direct integrin expression and promote proliferation, improving the regenerative capability of cultured keratinocytes for basic science and translational work.
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Affiliation(s)
- Duncan Davis-Hall
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and Department of Bioengineering, University of Colorado Denver, Anschutz Medical Campus, 12700 E 19th Ave, MS C272, Aurora, CO, 80045, USA
| | - Vy Nguyen
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and Department of Bioengineering, University of Colorado Denver, Anschutz Medical Campus, 12700 E 19th Ave, MS C272, Aurora, CO, 80045, USA
| | - Tyler J D'Ovidio
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and Department of Bioengineering, University of Colorado Denver, Anschutz Medical Campus, 12700 E 19th Ave, MS C272, Aurora, CO, 80045, USA
| | - Ethan Tsai
- Metropolitan State University of Denver, Chemistry and Biochemistry Department, P.O. Box 173362, Campus Box 52, Denver, CO, 80217-3362, USA
| | - Ganna Bilousova
- University of Colorado Anschutz Medical Campus, School of Medicine, Department of Dermatology and Charles C. Gates Center for Regenerative Medicine, 12800 E. 19th Ave, P18-8125, Aurora, CO, 80045, USA
| | - Chelsea M Magin
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine and Department of Bioengineering, University of Colorado Denver, Anschutz Medical Campus, 12700 E 19th Ave, MS C272, Aurora, CO, 80045, USA
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Bailey KE, Floren ML, D'Ovidio TJ, Lammers SR, Stenmark KR, Magin CM. Tissue-informed engineering strategies for modeling human pulmonary diseases. Am J Physiol Lung Cell Mol Physiol 2019; 316:L303-L320. [PMID: 30461289 PMCID: PMC6397349 DOI: 10.1152/ajplung.00353.2018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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] [Received: 08/01/2018] [Revised: 11/13/2018] [Accepted: 11/14/2018] [Indexed: 12/14/2022] Open
Abstract
Chronic pulmonary diseases, including idiopathic pulmonary fibrosis (IPF), pulmonary hypertension (PH), and chronic obstructive pulmonary disease (COPD), account for staggering morbidity and mortality worldwide but have limited clinical management options available. Although great progress has been made to elucidate the cellular and molecular pathways underlying these diseases, there remains a significant disparity between basic research endeavors and clinical outcomes. This discrepancy is due in part to the failure of many current disease models to recapitulate the dynamic changes that occur during pathogenesis in vivo. As a result, pulmonary medicine has recently experienced a rapid expansion in the application of engineering principles to characterize changes in human tissues in vivo and model the resulting pathogenic alterations in vitro. We envision that engineering strategies using precision biomaterials and advanced biomanufacturing will revolutionize current approaches to disease modeling and accelerate the development and validation of personalized therapies. This review highlights how advances in lung tissue characterization reveal dynamic changes in the structure, mechanics, and composition of the extracellular matrix in chronic pulmonary diseases and how this information paves the way for tissue-informed engineering of more organotypic models of human pathology. Current translational challenges are discussed as well as opportunities to overcome these barriers with precision biomaterial design and advanced biomanufacturing techniques that embody the principles of personalized medicine to facilitate the rapid development of novel therapeutics for this devastating group of chronic diseases.
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Affiliation(s)
- Kolene E Bailey
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
| | - Michael L Floren
- Cardiovascular Pulmonary Research Laboratories, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
- Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
| | - Tyler J D'Ovidio
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
| | - Steven R Lammers
- Department of Bioengineering, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
| | - Kurt R Stenmark
- Cardiovascular Pulmonary Research Laboratories, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
- Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
| | - Chelsea M Magin
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
- Department of Bioengineering, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
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Mann EE, Magin CM, Mettetal MR, May RM, Henry MM, DeLoid H, Prater J, Sullivan L, Thomas JG, Twite MD, Parker AE, Brennan AB, Reddy ST. Micropatterned Endotracheal Tubes Reduce Secretion-Related Lumen Occlusion. Ann Biomed Eng 2016; 44:3645-3654. [PMID: 27535564 DOI: 10.1007/s10439-016-1698-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 03/11/2016] [Accepted: 07/12/2016] [Indexed: 01/01/2023]
Abstract
Tracheal intubation disrupts physiological homeostasis of secretion production and clearance, resulting in secretion accumulation within endotracheal tubes (ETTs). Novel in vitro and in vivo models were developed to specifically recapitulate the clinical manifestations of ETT occlusion. The novel Sharklet™ micropatterned ETT was evaluated, using these models, for the ability to reduce the accumulation of both bacterial biofilm and airway mucus compared to a standard care ETT. Novel ETTs with micropattern on the inner and outer surfaces were placed adjacent to standard care ETTs in in vitro biofilm and airway patency (AP) models. The primary outcome for the biofilm model was to compare commercially-available ETTs (standard care and silver-coated) to micropatterned for quantity of biofilm accumulation. The AP model's primary outcome was to evaluate accumulation of artificial airway mucus. A 24-h ovine mechanical ventilation model evaluated the primary outcome of relative quantity of airway secretion accumulation in the ETTs tested. The secondary outcome was measuring the effect of secretion accumulation in the ETTs on airway resistance. Micropatterned ETTs significantly reduced biofilm by 71% (p = 0.016) compared to smooth ETTs. Moreover, micropatterned ETTs reduced lumen occlusion, in the AP model, as measured by cross-sectional area, in distal (85%, p = 0.005), middle (84%, p = 0.001) and proximal (81%, p = 0.002) sections compared to standard care ETTs. Micropatterned ETTs reduced the volume of secretion accumulation in a sheep model of occlusion by 61% (p < 0.001) after 24 h of mechanical ventilation. Importantly, micropatterned ETTs reduced the rise in ventilation peak inspiratory pressures over time by as much as 49% (p = 0.005) compared to standard care ETTs. Micropatterned ETTs, demonstrated here to reduce bacterial contamination and mucus occlusion, will have the capacity to limit complications occurring during mechanical ventilation and ultimately improve patient care.
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Affiliation(s)
- Ethan E Mann
- Sharklet Technologies, Inc., 12635 E Montview Blvd., Suite 155, Aurora, CO, 80045, USA
| | - Chelsea M Magin
- Sharklet Technologies, Inc., 12635 E Montview Blvd., Suite 155, Aurora, CO, 80045, USA
| | - M Ryan Mettetal
- Sharklet Technologies, Inc., 12635 E Montview Blvd., Suite 155, Aurora, CO, 80045, USA
| | - Rhea M May
- Sharklet Technologies, Inc., 12635 E Montview Blvd., Suite 155, Aurora, CO, 80045, USA
| | - MiKayla M Henry
- Sharklet Technologies, Inc., 12635 E Montview Blvd., Suite 155, Aurora, CO, 80045, USA
| | - Heather DeLoid
- Preclinical Translational Services, Wake Forest Baptist Health, Winston-Salem, NC, USA
| | - Justin Prater
- Preclinical Translational Services, Wake Forest Baptist Health, Winston-Salem, NC, USA
| | - Lauren Sullivan
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - John G Thomas
- Department of Microbiology and Laboratory Medicine, Allegheny Health Network, Pittsburgh, PA, USA
| | - Mark D Twite
- Department of Anesthesiology, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA
| | - Albert E Parker
- Department of Mathematical Sciences, Center for Biofilm Engineering, Montana State University, Bozeman, MT, USA
| | - Anthony B Brennan
- Department of Materials Science & Engineering, University of Florida, Gainesville, FL, USA.,J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Shravanthi T Reddy
- Sharklet Technologies, Inc., 12635 E Montview Blvd., Suite 155, Aurora, CO, 80045, USA.
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Magin CM, Neale DB, Drinker MC, Willenberg BJ, Reddy ST, La Perle KM, Schultz GS, Brennan AB. Evaluation of a bilayered, micropatterned hydrogel dressing for full-thickness wound healing. Exp Biol Med (Maywood) 2016; 241:986-95. [PMID: 27037279 DOI: 10.1177/1535370216640943] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Nearly 12 million wounds are treated in emergency departments throughout the United States every year. The limitations of current treatments for complex, full-thickness wounds are the driving force for the development of new wound treatment devices that result in faster healing of both dermal and epidermal tissue. Here, a bilayered, biodegradable hydrogel dressing that uses microarchitecture to guide two key steps in the proliferative phase of wound healing, re-epithelialization, and revascularization, was evaluated in vitro in a cell migration assay and in vivo in a bipedicle ischemic rat wound model. Results indicate that the Sharklet™-micropatterned apical layer of the dressing increased artificial wound coverage by up to 64%, P = 0.024 in vitro. In vivo evaluation demonstrated that the bilayered dressing construction enhanced overall healing outcomes significantly compared to untreated wounds and that these outcomes were not significantly different from a leading clinically available wound dressing. Collectively, these results demonstrate high potential for this new dressing to effectively accelerate wound healing.
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Affiliation(s)
| | - Dylan B Neale
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA
| | | | - Bradley J Willenberg
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA Department of Internal Medicine, University of Central Florida, Orlando, FL 32827, USA Saisijin Biotech, LLC, Orlando, FL 32827, USA
| | | | - Krista Md La Perle
- Department of Veterinary Biosciences, College of Veterinary Medicine and Comparative Pathology & Mouse Phenotyping Shared Resource, Comprehensive Cancer Center The Ohio State University, Columbus, OH 43210, USA
| | - Gregory S Schultz
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Anthony B Brennan
- Sharklet Technologies, Inc., Aurora, CO 80045, USA Saisijin Biotech, LLC, Orlando, FL 32827, USA J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
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Magin CM, May RM, Drinker MC, Cuevas KH, Brennan AB, Reddy ST. Micropatterned Protective Membranes Inhibit Lens Epithelial Cell Migration in Posterior Capsule Opacification Model. Transl Vis Sci Technol 2015; 4:9. [PMID: 25883876 DOI: 10.1167/tvst.4.2.9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 12/09/2014] [Accepted: 02/04/2015] [Indexed: 12/15/2022] Open
Abstract
PURPOSE To evaluate the ability of Sharklet (SK) micropatterns to inhibit lens epithelial cell (LEC) migration. Sharklet Technologies, Inc. (STI) and InSight Innovations, LLC have proposed to develop a Sharklet-patterned protective membrane (PM) to be implanted in combination with a posterior chamber intraocular lens (IOL) to inhibit cellular migration across the posterior capsule, and thereby reduce rates of posterior capsular opacification (PCO). METHODS A variety of STI micropatterns were evaluated versus smooth (SM) controls in a modified scratch wound assay for the ability to reduce or inhibit LEC migration. The best performing topography was selected, translated to a radial design, and applied to PM prototypes. The PM prototypes were tested in an in vitro PCO model for reduction of cell migration behind an IOL versus unpatterned prototypes and IOLs with no PM. In both assays, cell migration was analyzed with fluorescent microscopy. RESULTS All SK micropatterns significantly reduced LEC migration compared with SM controls. Micropatterns that protruded from the surface reduced migration more than recessed features. The best performing micropattern reduced LEC coverage by 80%, P = 0.0001 (ANOVA, Tukey Test). Micropatterned PMs reduced LEC migration in a PCO model by 50%, P = 0.0005 (ANOVA, Tukey Test) compared with both IOLs with no PM and IOLs with SM PMs. CONCLUSIONS Collectively, in vitro results indicate the implantation of micropatterned PMs in combination with posterior chamber IOLs could significantly reduce rates of clinically relevant PCO. This innovative technology is a globally accessible solution to high PCO rates. TRANSLATIONAL RELEVANCE A novel IOL incorporating the SK micropattern in a membrane design surrounding the optic may help increase the success of cataract surgery by reducing secondary cataract, or PCO.
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Affiliation(s)
| | - Rhea M May
- Sharklet Technologies, Inc., Aurora, CO, USA
| | | | - Kevin H Cuevas
- Rocky Mountain Ophthalmology and InSight Innovations, LLC, Golden, CO, USA
| | - Anthony B Brennan
- Sharklet Technologies, Inc., Aurora, CO, USA ; Department of Materials Science & Engineering and J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
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May RM, Magin CM, Mann EE, Drinker MC, Fraser JC, Siedlecki CA, Brennan AB, Reddy ST. An engineered micropattern to reduce bacterial colonization, platelet adhesion and fibrin sheath formation for improved biocompatibility of central venous catheters. Clin Transl Med 2015; 4:9. [PMID: 25852825 PMCID: PMC4385044 DOI: 10.1186/s40169-015-0050-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 01/27/2015] [Indexed: 02/03/2023] Open
Abstract
Background Catheter-related bloodstream infections (CRBSIs) and catheter-related thrombosis (CRT) are common complications of central venous catheters (CVC), which are used to monitor patient health and deliver medications. CVCs are subject to protein adsorption and platelet adhesion as well as colonization by the natural skin flora (i.e. Staphylococcus aureus and Staphylococcus epidermidis). Antimicrobial and antithrombotic drugs can prevent infections and thrombosis-related complications, but have associated resistance and safety risks. Surface topographies have shown promise in limiting platelet and bacterial adhesion, so it was hypothesized that an engineered Sharklet micropattern, inspired by shark-skin, may provide a combined approach as it has wide reaching anti-fouling capabilities. To assess the feasibility for this micropattern to improve CVC-related healthcare outcomes, bacterial colonization and platelet interactions were analyzed in vitro on a material common for vascular access devices. Methods To evaluate bacterial inhibition after simulated vascular exposure, micropatterned thermoplastic polyurethane surfaces were preconditioned with blood proteins in vitro then subjected to a bacterial challenge for 1 and 18 h. Platelet adhesion was assessed with fluorescent microscopy after incubation of the surfaces with platelet-rich plasma (PRP) supplemented with calcium. Platelet activation was further assessed by monitoring fibrin formation with fluorescent microscopy after exposure of the surfaces to platelet-rich plasma (PRP) supplemented with calcium in a flow-cell. Results are reported as percent reductions and significance is based on t-tests and ANOVA models of log reductions. All experiments were replicated at least three times. Results Blood and serum conditioned micropatterned surfaces reduced 18 h S. aureus and S. epidermidis colonization by 70% (p ≤ 0.05) and 71% (p < 0.01), respectively, when compared to preconditioned unpatterned controls. Additionally, platelet adhesion and fibrin sheath formation were reduced by 86% and 80% (p < 0.05), respectively, on the micropattern, when compared to controls. Conclusions The Sharklet micropattern, in a CVC-relevant thermoplastic polyurethane, significantly reduced bacterial colonization and relevant platelet interactions after simulated vascular exposure. These results suggest that the incorporation of the Sharklet micropattern on the surface of a CVC may inhibit the initial events that lead to CRBSI and CRT.
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Affiliation(s)
- Rhea M May
- Sharklet Technologies, Inc, 12635 E. Montview Blvd. Suite 155, Aurora, CO 80045, CO USA
| | - Chelsea M Magin
- Sharklet Technologies, Inc, 12635 E. Montview Blvd. Suite 155, Aurora, CO 80045, CO USA
| | - Ethan E Mann
- Sharklet Technologies, Inc, 12635 E. Montview Blvd. Suite 155, Aurora, CO 80045, CO USA
| | - Michael C Drinker
- Sharklet Technologies, Inc, 12635 E. Montview Blvd. Suite 155, Aurora, CO 80045, CO USA
| | - John C Fraser
- Sharklet Technologies, Inc, 12635 E. Montview Blvd. Suite 155, Aurora, CO 80045, CO USA
| | | | - Anthony B Brennan
- Departments of Materials Science and Engineering and Biomedical Engineering University of Florida, Gainesville, FL 32611 USA
| | - Shravanthi T Reddy
- Sharklet Technologies, Inc, 12635 E. Montview Blvd. Suite 155, Aurora, CO 80045, CO USA
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Magin CM, Alge DL, Gould ST, Anseth KS. Clickable, photodegradable hydrogels to dynamically modulate valvular interstitial cell phenotype. Adv Healthc Mater 2014; 3:649-57. [PMID: 24459068 DOI: 10.1002/adhm.201300288] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [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: 07/17/2013] [Revised: 09/26/2013] [Indexed: 11/06/2022]
Abstract
Biophysical cues are widely recognized to influence cell phenotype. While this evidence was established using static substrates, there is growing interest in creating stimulus-responsive biomaterials that better recapitulate the dynamic extracellular matrix. Here, a clickable, photodegradable hydrogel substrate that allows the user to precisely control substrate elasticity and topography in situ is presented. The hydrogels are synthesized by reacting an 8-arm poly(ethylene glycol) alkyne with an azide-functionalized photodegradable crosslinker. The utility of this platform by exploiting its photoresponsive properties to modulate the phenotype of porcine aortic valvular interstitial cells (VICs) is demonstrated. First, VIC phenotype is monitored, in response to initial substratum modulus and static topographic cues. Higher modulus (E ≈ 15 kPa) substrates induce higher levels of activation (≈70% myofibroblasts) versus soft (E ≈ 3 kPa) substrates (≈20% myofibroblasts). Microtopographies that induce VIC alignment and elongation on low modulus substrates also stimulate activation. Finally, VIC phenotype is monitored in response to sequential in situ manipulations. The results illustrate that VIC activation on stiff surfaces (≈70% myofibroblasts) can be partially reversed by reducing surface modulus (≈30% myofibroblats) and subsequently re-activated by anisotropic topographies (≈60% myofibroblasts). Such dynamic substrates afford unique opportunities to decipher the complex role of matrix cues on the plasticity of VIC activation.
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Affiliation(s)
- Chelsea M. Magin
- Department of Chemical and Biological Engineering and the BioFrontiers Institute University of Colorado 596 UCB Boulder CO 80303舑0596 USA
| | - Daniel L. Alge
- Department of Chemical and Biological Engineering and the BioFrontiers Institute University of Colorado 596 UCB Boulder CO 80303舑0596 USA
- The Howard Hughes Medical Institute University of Colorado 596 UCB Boulder CO 80303舑1904 USA
| | - Sarah T. Gould
- Department of Chemical and Biological Engineering and the BioFrontiers Institute University of Colorado 596 UCB Boulder CO 80303舑0596 USA
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering and the BioFrontiers Institute University of Colorado 596 UCB Boulder CO 80303舑0596 USA
- The Howard Hughes Medical Institute University of Colorado 596 UCB Boulder CO 80303舑1904 USA
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Decker JT, Magin CM, Long CJ, Finlay JA, Callow ME, Callow JA, Brennan AB. Engineered antifouling microtopographies: an energetic model that predicts cell attachment. Langmuir 2013; 29:13023-13030. [PMID: 24044383 DOI: 10.1021/la402952u] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have developed a model for the prediction of cell attachment to engineered microtopographies based on two previous models: the attachment point theory and the engineered roughness index (ERI) model. The new surface energetic attachment (SEA) model is based on both the properties of the cell-material interface and the size and configuration of the topography relative to the organism. We have used Monte Carlo simulation to examine the SEA model's ability to predict relative attachment of the green alga Ulva linza to different locations within a unit cell. We have also compared the predicted relative attachment for Ulva linza, the diatom Navicula incerta, the marine bacterium Cobetia marina, and the barnacle cyprid Balanus amphitrite to a wide variety of microtopographies. We demonstrate good correlation between the experimental results and the model results for all tested experimental data and thus show the SEA model may be used as a powerful indicator of the efficacy for antifouling topographies.
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Affiliation(s)
- Joseph T Decker
- Department of Materials Science and Engineering, University of Florida , Gainesville, Florida 32611-6400, United States
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Magin CM, Finlay JA, Clay G, Callow ME, Callow JA, Brennan AB. Antifouling Performance of Cross-linked Hydrogels: Refinement of an Attachment Model. Biomacromolecules 2011; 12:915-22. [DOI: 10.1021/bm101229v] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | - Anthony B. Brennan
- Department of Materials Science & Engineering, University of Florida, Gainesville, Florida 32611, United States
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Magin CM, Long CJ, Cooper SP, Ista LK, López GP, Brennan AB. Engineered antifouling microtopographies: the role of Reynolds number in a model that predicts attachment of zoospores of Ulva and cells of Cobetia marina. Biofouling 2010; 26:719-727. [PMID: 20706891 DOI: 10.1080/08927014.2010.511198] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A correlation between the attachment density of cells from two phylogenetic groups (prokaryotic Bacteria and eukaryotic Plantae), with surface roughness is reported for the first time. The results represent a paradigm shift in the understanding of cell attachment, which is a critical step in the biofouling process. The model predicts that the attachment densities of zoospores of the green alga, Ulva, and cells of the marine bacterium, Cobetia marina, scale inversely with surface roughness. The size and motility of the bacterial cells and algal spores were incorporated into the attachment model by multiplying the engineered roughness index (ERI(II)), which is a representation of surface energy, by the Reynolds number (Re) of the cells. The results showed a negative linear correlation of normalized, transformed attachment density for both organisms with ERI(II) x Re (R(2) = 0.77). These studies demonstrate for the first time that organisms respond in a uniform manner to a model, which incorporates surface energy and the Reynolds number of the organism.
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Affiliation(s)
- Chelsea M Magin
- J. Crayton Pruitt Family, Department of Biomedical Engineering, University of Florida, Gainesville, Florida, USA
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