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Abstract
There is an urgent need for physiologically relevant and customizable biochip models of human lung tissue to provide a niche for lung disease modeling and drug efficacy. Although various lung-on-a-chips have been developed, the conventional fabrication method has been limited in reconstituting a very thin and multilayered architecture and spatial arrangements of multiple cell types in a microfluidic device. To overcome these limitations, we developed a physiologically relevant human alveolar lung-on-a-chip model, effectively integrated with an inkjet-printed, micron-thick, and three-layered tissue. After bioprinting lung tissues inside four culture inserts layer-by-layer, the inserts are implanted into a biochip that supplies a flow of culture medium. This modular implantation procedure enables the formation of a lung-on-a-chip to facilitate the culture of 3D-structured inkjet-bioprinted lung models under perfusion at the air-liquid interface. The bioprinted models cultured on the chip maintained their structure with three layers of tens of micrometers and achieved a tight junction in the epithelial layer, the critical properties of an alveolar barrier. The upregulation of genes involved in the essential functions of alveoli was also confirmed in our model. Our culture insert-mountable organ-on-a-chip is a versatile platform that can be applied to various organ models by implanting and replacing culture inserts. It is amenable to mass production and the development of customized models through the convergence with bioprinting technology.
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Affiliation(s)
- Wookyeom Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Yunji Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Dayoon Kang
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Taejeong Kwak
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Hwa-Rim Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Sungjune Jung
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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Ben Messaoud N, Barreiros dos Santos M, Trocado V, Nogueira-Silva C, Queirós R. A novel label-free electrochemical immunosensor for detection of surfactant protein B in amniotic fluid. Talanta 2023; 251:123744. [DOI: 10.1016/j.talanta.2022.123744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 07/05/2022] [Accepted: 07/14/2022] [Indexed: 11/17/2022]
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3
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Lv L, Ye L, Lin X, Li L, Chen J, Yue W, Wu X. Functional and Allergenic Properties Assessment of Conalbumin (Ovotransferrin) after Oxidation. Foods 2022; 11:foods11152308. [PMID: 35954072 PMCID: PMC9367811 DOI: 10.3390/foods11152308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/18/2022] [Accepted: 07/21/2022] [Indexed: 11/16/2022] Open
Abstract
Conalbumin (CA) is an iron-binding egg protein that has various bioactivities and causes major allergenicity in humans. This study investigated how oxidation affects the multiple functional properties of CA. The lipid peroxidation method was used to prepare treated CA [2,2′-azobis (2-amidinopropane) dihydrochloride (AAPH)-CA and acrolein-CA] complexes. CA induced structural changes through oxidation. These changes enhanced the digestibility, rate of endocytosis in dendritic cells, and emulsifying and foaming properties of CA. ELISA and immunoblot analysis showed that the complexes reduced the IgE-binding ability of CA through lipid oxidation. KU812 cell assays showed that modification by AAPH and acrolein caused the release of IL-4 and histamine to decline. In conclusion, oxidation treatment modified the functional and structural properties of CA, reducing allergenicity during processing and preservation.
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4
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Enami S, Colussi AJ. OH-Radical Oxidation of Lung Surfactant Protein B on Aqueous Surfaces. Mass Spectrom (Tokyo) 2018; 7:S0077. [PMID: 30533342 PMCID: PMC6245955 DOI: 10.5702/massspectrometry.s0077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 10/11/2018] [Indexed: 11/23/2022] Open
Abstract
Air pollutants generate reactive oxygen species on lung surfaces. Here we report how hydroxyl radicals (·OH) injected on the surface of water react with SP-B1-25, a 25-residue polypeptide surrogate of human lung surfactant protein B. Our experiments consist of intersecting microjets of aqueous SP-B1-25 solutions with O3/O2/H2O/N2(g) gas streams that are photolyzed into ·OH(g) in situ by 266 nm laser nanosecond pulses. Surface-sensitive mass spectrometry enables us to monitor the prompt (<10 μs) and simultaneous formation of primary O n -containing products/intermediates (n≤5) triggered by the reaction of ·OH with interfacial SP-B1-25. We found that O-atoms from both O3 and ·OH are incorporated into the reactive cysteine Cys8 and Cys11 and tryptophan Trp9 components of the hydrophobic N-terminus of SP-B1-25 that lies at the topmost layers of the air-liquid interface. Remarkably, these processes are initiated by ·OH additions rather than by H-atom abstractions from S-H, C-H, or N-H groups. By increasing the hydrophilicity of the N-terminus region of SP-B1-25, these transformations will impair its role as a surfactant.
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Affiliation(s)
| | - Agustín J Colussi
- Linde Center for Global Environmental Science, California Institute of Technology
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5
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Walther FJ, Gupta M, Gordon LM, Waring AJ. A sulfur-free peptide mimic of surfactant protein B (B-YL) exhibits high in vitro and in vivo surface activities. Gates Open Res 2018; 2:13. [PMID: 30234192 PMCID: PMC6139377 DOI: 10.12688/gatesopenres.12799.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2018] [Indexed: 11/23/2022] Open
Abstract
Background: Animal-derived surfactants containing surfactant proteins B (SP-B) and C (SP-C) are used to treat respiratory distress syndrome (RDS) in preterm infants. SP-B (79 residues) plays a pivotal role in lung function and the design of synthetic lung surfactant. Super Mini-B (SMB), a 41-residue peptide based on the N- and C-domains of SP-B covalently joined with a turn and two disulfides, folds as an α-helix hairpin mimicking the properties of these domains in SP-B. Here, we studied ‘B-YL’, a 41-residue SMB variant that has its four cysteine and two methionine residues replaced by tyrosine and leucine, respectively, to test whether these hydrophobic substitutions produce a surface-active, α-helix hairpin. Methods: Structure and function of B-YL and SMB in surfactant lipids were compared with CD and FTIR spectroscopy, and surface activity with captive bubble surfactometry and in lavaged, surfactant-deficient adult rabbits. Results: CD and FTIR spectroscopy of B-YL in surfactant lipids showed secondary structures compatible with peptide folding as an α-helix hairpin, similar to SMB in lipids. B-YL in surfactant lipids demonstrated excellent
in vitro surface activity and good oxygenation and dynamic compliance in lavaged, surfactant-deficient adult rabbits, suggesting that the four tyrosine substitutions are an effective replacement for the disulfide-reinforced helix-turn of SMB. Here, the B-YL fold may be stabilized by a core of clustered tyrosines linking the N- and C-helices through non-covalent interactions involving aromatic rings. Conclusions: ‘Sulfur-free’ B-YL forms an amphipathic helix-hairpin in surfactant liposomes with high surface activity and is functionally similar to SMB and native SP-B. The removal of the cysteines makes B-YL more feasible to scale up production for clinical application. B-YL’s possible resistance against free oxygen radical damage to methionines by substitutions with leucine provides an extra edge over SMB in the treatment of respiratory failure in preterm infants with RDS.
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Affiliation(s)
- Frans J Walther
- Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, 90502, USA
| | - Monik Gupta
- Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, 90502, USA
| | - Larry M Gordon
- Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, 90502, USA
| | - Alan J Waring
- Department of Pediatrics, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, 90502, USA
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6
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Walther FJ, Gupta M, Gordon LM, Waring AJ. An oxidation-resistant peptide mimic of surfactant protein B (B-YL) forms an amphipathic helix-hairpin in liposomes with high surface activity. Gates Open Res 2018. [DOI: 10.12688/gatesopenres.12799.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Animal-derived surfactants containing surfactant proteins B (SP-B) and C (SP-C) are used to treat respiratory distress syndrome (RDS) in preterm infants. SP-B (79 residues) plays a pivotal role in lung function and the design of synthetic lung surfactant. Super Mini-B (SMB), a 41-residue peptide based on the N- and C-domains of SP-B joined with a turn and two disulfides, folds as an α-helix hairpin mimicking the properties of these domains in SP-B. Here, we studied ‘B-YL’, a 41-residue oxidation-resistant SMB variant that has its four Cys and two Met residues replaced by Tyr and Leu, respectively, to test whether these hydrophobic substitutions produce a surface-active, α-helix hairpin.Methods:Structure and function of B-YL and SMB in surfactant lipids were compared with CD and FTIR spectroscopy and molecular dynamic (MD) simulations, and surface activity with captive bubble surfactometry and in lavaged, surfactant-deficient adult rabbits.Results:CD and FTIR spectroscopy of B-YL in surfactant lipids showed secondary structures compatible with peptide folding as an α-helix hairpin, similar to SMB in lipids. MD simulations confirmed that B-YL maintained its α-helix hairpin in a lipid bilayer, matching the hairpin obtained from MD of SMB. Unlike the disulfide-reinforced helix-turn of SMB, the B-YL fold was stabilized by a core of clustered Tyr linking the N- and C-helices through noncovalent interactions involving aromatic rings. B-YL in surfactant lipids demonstrated excellentin vitrosurface activity and good oxygenation and dynamic compliance in lavaged, surfactant-deficient adult rabbits.Conclusions:‘Sulfur-free’ and ‘oxidation-resistant’ B-YL forms an amphipathic helix-hairpin in surfactant liposomes with high surface activity and is functionally similar to SMB and native SP-B. B-YL’s resistance against free oxygen radical damage provides an extra edge over oxidized SMB in the treatment of respiratory failure in preterm infants with RDS and children and adults with acute lung injury.
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7
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Lv L, Lin H, Li Z, Yuan F, Gao Q, Ma J. Effect of 4-hydroxy-2-nonenal treatment on the IgE binding capacity and structure of shrimp (Metapenaeus ensis) tropomyosin. Food Chem 2016; 212:313-22. [DOI: 10.1016/j.foodchem.2016.05.152] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 05/08/2016] [Accepted: 05/24/2016] [Indexed: 11/24/2022]
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Baoukina S, Tieleman DP. Computer simulations of lung surfactant. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2431-2440. [PMID: 26922885 DOI: 10.1016/j.bbamem.2016.02.030] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 02/21/2016] [Accepted: 02/23/2016] [Indexed: 01/26/2023]
Abstract
Lung surfactant lines the gas-exchange interface in the lungs and reduces the surface tension, which is necessary for breathing. Lung surfactant consists mainly of lipids with a small amount of proteins and forms a monolayer at the air-water interface connected to bilayer reservoirs. Lung surfactant function involves transfer of material between the monolayer and bilayers during the breathing cycle. Lipids and proteins are organized laterally in the monolayer; selected species are possibly preferentially transferred to bilayers. The complex 3D structure of lung surfactant and the exact roles of lipid organization and proteins remain important goals for research. We review recent simulation studies on the properties of lipid monolayers, monolayers with phase coexistence, monolayer-bilayer transformations, lipid-protein interactions, and effects of nanoparticles on lung surfactant. This article is part of a Special Issue entitled: Biosimulations edited by Ilpo Vattulainen and Tomasz Róg.
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Affiliation(s)
- Svetlana Baoukina
- Department of Biological Sciences and Centre for Molecular Simulation, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.
| | - D Peter Tieleman
- Department of Biological Sciences and Centre for Molecular Simulation, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.
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Hemming J, Hughes BR, Rennie AR, Tomas S, Campbell RA, Hughes AV, Arnold T, Botchway SW, Thompson KC. Environmental Pollutant Ozone Causes Damage to Lung Surfactant Protein B (SP-B). Biochemistry 2015; 54:5185-97. [PMID: 26270023 PMCID: PMC4571829 DOI: 10.1021/acs.biochem.5b00308] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 07/30/2015] [Indexed: 11/28/2022]
Abstract
Lung surfactant protein B (SP-B) is an essential protein found in the surfactant fluid at the air-water interface of the lung. Exposure to the air pollutant ozone could potentially damage SP-B and lead to respiratory distress. We have studied two peptides, one consisting of the N-terminus of SP-B [SP-B(1-25)] and the other a construct of the N- and C-termini of SP-B [SP-B(1-25,63-78)], called SMB. Exposure to dilute levels of ozone (~2 ppm) of monolayers of each peptide at the air-water interface leads to a rapid reaction, which is evident from an increase in the surface tension. Fluorescence experiments revealed that this increase in surface tension is accompanied by a loss of fluorescence from the tryptophan residue at the interface. Neutron and X-ray reflectivity experiments show that, in contrast to suggestions in the literature, the peptides are not solubilized upon oxidation but rather remain at the interface with little change in their hydration. Analysis of the product material reveals that no cleavage of the peptides occurs, but a more hydrophobic product is slowly formed together with an increased level of oligomerization. We attributed this to partial unfolding of the peptides. Experiments conducted in the presence of phospholipids reveal that the presence of the lipids does not prevent oxidation of the peptides. Our results strongly suggest that exposure to low levels of ozone gas will damage SP-B, leading to a change in its structure. The implication is that the oxidized protein will be impaired in its ability to interact at the air-water interface with negatively charged phosphoglycerol lipids, thus compromising what is thought to be its main biological function.
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Affiliation(s)
- Joanna
M. Hemming
- Department of Biological Sciences
and Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E
7HX, U.K.
| | - Brian R. Hughes
- Department of Biological Sciences
and Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E
7HX, U.K.
| | - Adrian R. Rennie
- Materials Physics, Department
of
Physics and Astronomy, Uppsala University, 75120 Uppsala, Sweden
| | - Salvador Tomas
- Department of Biological Sciences
and Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E
7HX, U.K.
| | - Richard A. Campbell
- Institut Laue-Langevin, 71 Avenue des Martyrs, CS20156, 38042 Grenoble Cedex 09, France
| | - Arwel V. Hughes
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory,
Harwell Oxford, Didcot, Oxfordshire OX11 0QX, U.K.
| | - Thomas Arnold
- Diamond
Light Source, Harwell
Science and Innovation Campus, Didcot OX11 0DE, U.K.
| | - Stanley W. Botchway
- STFC, Lasers
for Science Facility,
Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory,
Harwell Oxford, Didcot, Oxfordshire OX11 0FA, U.K.
| | - Katherine C. Thompson
- Department of Biological Sciences
and Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E
7HX, U.K.
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Trnková L, Dršata J, Boušová I. Oxidation as an important factor of protein damage: Implications for Maillard reaction. J Biosci 2015; 40:419-39. [DOI: 10.1007/s12038-015-9523-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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11
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Lv L, Lin H, Li Z, Song Y, Lin H, Wang A. Identification of oxidative modification of shrimp (Metapenaeus ensis) tropomyosin induced by malonaldehyde. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2281-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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The pharmacology of acute lung injury in sepsis. Adv Pharmacol Sci 2011; 2011:254619. [PMID: 21738527 PMCID: PMC3130333 DOI: 10.1155/2011/254619] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 05/03/2011] [Indexed: 01/21/2023] Open
Abstract
Acute lung injury (ALI) secondary to sepsis is one of the leading causes of death in sepsis. As such, many pharmacologic and nonpharmacologic strategies have been employed to attenuate its course. Very few of these strategies have proven beneficial. In this paper, we discuss the epidemiology and pathophysiology of ALI, commonly employed pharmacologic and nonpharmacologic treatments, and innovative therapeutic modalities that will likely be the focus of future trials.
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