1
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Feo-Lucas L, Godio C, Minguito de la Escalera M, Alvarez-Ladrón N, Villarrubia LH, Vega-Pérez A, González-Cintado L, Domínguez-Andrés J, García-Fojeda B, Montero-Fernández C, Casals C, Autilio C, Pérez-Gil J, Crainiciuc G, Hidalgo A, López-Bravo M, Ardavín C. Airway allergy causes alveolar macrophage death, profound alveolar disorganization and surfactant dysfunction. Front Immunol 2023; 14:1125984. [PMID: 37234176 PMCID: PMC10206250 DOI: 10.3389/fimmu.2023.1125984] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 04/20/2023] [Indexed: 05/27/2023] Open
Abstract
Respiratory disorders caused by allergy have been associated to bronchiolar inflammation leading to life-threatening airway narrowing. However, whether airway allergy causes alveolar dysfunction contributing to the pathology of allergic asthma remains unaddressed. To explore whether airway allergy causes alveolar dysfunction that might contribute to the pathology of allergic asthma, alveolar structural and functional alterations were analyzed during house dust mite (HDM)-induced airway allergy in mice, by flow cytometry, light and electron microscopy, monocyte transfer experiments, assessment of intra-alveolarly-located cells, analysis of alveolar macrophage regeneration in Cx3cr1 cre:R26-yfp chimeras, analysis of surfactant-associated proteins, and study of lung surfactant biophysical properties by captive bubble surfactometry. Our results demonstrate that HDM-induced airway allergic reactions caused severe alveolar dysfunction, leading to alveolar macrophage death, pneumocyte hypertrophy and surfactant dysfunction. SP-B/C proteins were reduced in allergic lung surfactant, that displayed a reduced efficiency to form surface-active films, increasing the risk of atelectasis. Original alveolar macrophages were replaced by monocyte-derived alveolar macrophages, that persisted at least two months after the resolution of allergy. Monocyte to alveolar macrophage transition occurred through an intermediate stage of pre-alveolar macrophage and was paralleled with translocation into the alveolar space, Siglec-F upregulation, and downregulation of CX3CR1. These data support that the severe respiratory disorders caused by asthmatic reactions not only result from bronchiolar inflammation, but additionally from alveolar dysfunction compromising an efficient gas exchange.
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Affiliation(s)
- Lidia Feo-Lucas
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Cristina Godio
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - María Minguito de la Escalera
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Natalia Alvarez-Ladrón
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Laura H. Villarrubia
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Adrián Vega-Pérez
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Leticia González-Cintado
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Jorge Domínguez-Andrés
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Belén García-Fojeda
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
| | - Carlos Montero-Fernández
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
| | - Cristina Casals
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
| | - Chiara Autilio
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre i+12, Madrid, Spain
| | - Jesús Pérez-Gil
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre i+12, Madrid, Spain
| | | | - Andrés Hidalgo
- Centro Nacional de Investigaciones Cardiovaculares Carlos III, Madrid, Spain
| | - María López-Bravo
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Carlos Ardavín
- Departamento de Inmunología y Oncología, Centro Nacional de Biotecnología/ Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
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Xu Y, Parra-Ortiz E, Wan F, Cañadas O, Garcia-Alvarez B, Thakur A, Franzyk H, Pérez-Gil J, Malmsten M, Foged C. Insights into the mechanisms of interaction between inhalable lipid-polymer hybrid nanoparticles and pulmonary surfactant. J Colloid Interface Sci 2023; 633:511-525. [PMID: 36463820 DOI: 10.1016/j.jcis.2022.11.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 07/15/2022] [Revised: 10/15/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
Abstract
Pulmonary delivery of small interfering RNA (siRNA) using nanoparticle-based delivery systems is promising for local treatment of respiratory diseases. We designed dry powder inhaler formulations of siRNA-loaded lipid-polymer hybrid nanoparticles (LPNs) with aerosolization properties optimized for inhalation therapy. Interactions between LPNs and pulmonary surfactant (PS) determine the fate of inhaled LPNs, but interaction mechanisms are unknown. Here we used surface-sensitive techniques to study how physicochemical properties and pathological microenvironments influence interactions between siRNA-loaded LPNs and supported PS layers. PS was deposited on SiO2 surfaces as single bilayer or multilayers and characterized using quartz crystal microbalance with dissipation monitoring and Fourier-transform infrared spectroscopy with attenuated total reflection. Immobilization of PS as multilayers, resembling the structural PS organization in the alveolar subphase, effectively reduced the relative importance of interactions between PS and the underlying surface. However, the binding affinity between PS and LPNs was identical in the two models. The physicochemical LPN properties influenced the translocation pathways and retention time of LPNs. Membrane fluidity and electrostatic interactions were decisive for the interaction strength between LPNs and PS. Experimental conditions reflecting pathological microenvironments promoted LPN deposition. Hence, these results shed new light on design criteria for LPN transport through the air-blood barrier.
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Affiliation(s)
- You Xu
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Elisa Parra-Ortiz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Feng Wan
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Olga Cañadas
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, 28040 Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - Begoña Garcia-Alvarez
- Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain; Department of Biochemistry and Molecular Biology, Faculty of Chemistry, Complutense University, 28040 Madrid, Spain
| | - Aneesh Thakur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Henrik Franzyk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Jagtvej 162, 2100 Copenhagen Ø, Denmark
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, 28040 Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - Martin Malmsten
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark; Department of Physical Chemistry 1, University of Lund, SE-22100 Lund, Sweden
| | - Camilla Foged
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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García-Mouton C, Parra-Ortiz E, Malmsten M, Cruz A, Pérez-Gil J. Pulmonary surfactant and drug delivery: vehiculization of a tryptophan-tagged antimicrobial peptide over the air-liquid interfacial highway. Eur J Pharm Biopharm 2022; 180:33-47. [PMID: 36154903 DOI: 10.1016/j.ejpb.2022.09.018] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/31/2022] [Accepted: 09/18/2022] [Indexed: 11/04/2022]
Abstract
This work evaluates interaction of pulmonary surfactant (PS) and antimicrobial peptides (AMPs) in order to investigate (i) if PS can be used to transport AMPs, and (ii) to what extent PS interferes with AMP function and vice versa. This, in turn, is motivated by a need to find new strategies to treat bacterial infections in the airways. Low respiratory tract infections (LRTIs) are a leading cause of illness and death worldwide that, together with the problem of multidrug-resistant (MDR) bacteria, bring to light the necessity of developing effective therapies that ensure high bioavailability of the drug at the site of infection and display a potent antimicrobial effect. Here, we propose the combination of AMPs with PS to improve their delivery, exemplified for the hydrophobically end-tagged AMP, GRR10W4 (GRRPRPRPRPWWWW-NH2), with previously demonstrated potent antimicrobial activity against a broad spectrum of bacteria under various conditions. Experiments using model systems emulating the respiratory interface and an operating alveolus, based on surface balances and bubble surfactometry, served to demonstrate that a fluorescently labelled version of GRR10W4 (GRR10W4-F), was able to interact and insert into PS membranes without affecting its biophysical function. Therefore, vehiculization of the peptide along air-liquid interfaces was enabled, even for interfaces previously occupied by surfactants layers. Furthermore, breathing-like compression-expansion dynamics promoted the interfacial release of GRR10W4-F after its delivery, which could further allow the peptide to perform its antimicrobial function. PS/GRR10W4-F formulations displayed greater antimicrobial effects and reduced toxicity on cultured airway epithelial cells compared to that of the peptide alone. Taken together, these results open the door to the development of novel delivery strategies for AMPs in order to increase the bioavailability of these molecules at the infection site via inhaled therapies.
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Affiliation(s)
- Cristina García-Mouton
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, 28040 Madrid, Spain
| | - Elisa Parra-Ortiz
- Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Martin Malmsten
- Department of Pharmacy, University of Copenhagen, DK-2100 Copenhagen, Denmark; Department of Physical Chemistry 1, University of Lund, SE-22100 Lund, Sweden
| | - Antonio Cruz
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, 28040 Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, 28040 Madrid, Spain.
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4
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Estrada P, Bañares-Hidalgo Á, Pérez-Gil J. Disulfide bonds in the SAPA domain of the pulmonary surfactant protein B precursor. J Proteomics 2022; 269:104722. [PMID: 36108905 DOI: 10.1016/j.jprot.2022.104722] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/31/2022] [Accepted: 09/06/2022] [Indexed: 10/14/2022]
Abstract
The disulfide bonds formed in the SAPA domain of a recombinant version of the NH2-terminal propeptide (SP-BN) from the precursor of human pulmonary surfactant protein B (SP-B) were identified through sequential digestion of SP-BN with GluC/trypsin or thermolysin/GluC, followed by mass spectrometry (MS) analysis. MS spectra allowed identification of disulfide bonds between Cys32-Cys49 and Cys40-Cys55, and we propose a disulfide connectivity pattern of 1-3 and 2-4 within the SAPA domain, with the Cys residues numbered according to their position from the N-terminus of the propeptide sequence. The peaks with m/z ∼ 2136 and ∼ 1780 in the MS spectrum of the GluC/trypsin digest were assigned to peptides 24AWTTSSLACAQGPE37 and 45QALQCR50 linked by Cys32-Cys49 and 38FWCQSLE44 and 51ALGHCLQE58 linked by Cys40-Cys55 respectively. Tandem mass spectrometry (MS/MS) analysis verified the position of the bonds. The results of the series ions, immonium ions and internal fragment ions were all compatible with the proposed 1-3/2-4 position of the disulfide bonds in the SAPA domain. This X-pattern differs from the kringle-type found in the SAPB domain of the SAPLIP proteins, where the first Cys in the sequence links to the last, the second to the penultimate and the third to the fourth one. Regarding the SAPB domain of the SP-BN propeptide, the MS analysis of both digests identified the bond Cys100-Cys112, numbered 7-8, which is coincident with the bond position in the kringle motif. SIGNIFICANCE: The SAPLIP (saposin-like proteins) family encompasses several proteins with homology to saposins (sphingolipids activator proteins). These are proteins with mainly alpha-helical folds, compact packing including well conserved disulfide bonds and ability to interact with phospholipids and membranes. There are two types of saposin-like domains termed as Saposin A (SAPA) and Saposin B (SAPB) domains. While disulfide connectivity has been well established in several SAPB domains, the position of disulfide bonds in SAPA domains is still unknown. The present study approaches a detailed proteomic study to determine disulfide connectivity in the SAPA domain of the precursor of human pulmonary surfactant-associated protein SP-B. This task has been a challenge requiring the combination of different sequential proteolytic treatments followed by MS analysis including MALDI-TOF and tandem mass MS/MS spectrometry. The determination for first time of the position of disulfide bonds in SAPA domains is an important step to understand the structural determinants defining its biological functions.
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Affiliation(s)
- Pilar Estrada
- Dept. Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, 28040 Madrid, Spain
| | - Ángeles Bañares-Hidalgo
- Dept. Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, 28040 Madrid, Spain
| | - Jesús Pérez-Gil
- Dept. Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, 28040 Madrid, Spain.
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5
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Korolainen H, Lolicato F, Enkavi G, Pérez-Gil J, Kulig W, Vattulainen I. Dimerization of the pulmonary surfactant protein C in a membrane environment. PLoS One 2022; 17:e0267155. [PMID: 35476695 PMCID: PMC9045638 DOI: 10.1371/journal.pone.0267155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 04/01/2022] [Indexed: 11/26/2022] Open
Abstract
Surfactant protein C (SP-C) has several functions in pulmonary surfactant. These include the transfer of lipids between different membrane structures, a role in surfactant recycling and homeostasis, and involvement in modulation of the innate defense system. Despite these important functions, the structures of functional SP-C complexes have remained unclear. SP-C is known to exist as a primarily α-helical structure with an apparently unstructured N-terminal region, yet there is recent evidence that the functions of SP-C could be associated with the formation of SP-C dimers and higher oligomers. In this work, we used molecular dynamics simulations, two-dimensional umbrella sampling, and well-tempered metadynamics to study the details of SP-C dimerization. The results suggest that SP-C dimerizes in pulmonary surfactant membranes, forming dimers of different topologies. The simulations identified a dimerization motif region V21xxxVxxxGxxxM33 that is much larger than the putative A30xxxG34 motif that is commonly assumed to control the dimerization of some α-helical transmembrane domains. The results provide a stronger basis for elucidating how SP-C functions in concert with other surfactant proteins.
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Affiliation(s)
- Hanna Korolainen
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Fabio Lolicato
- Department of Physics, University of Helsinki, Helsinki, Finland
- Heidelberg University Biochemistry Center, Heidelberg, Germany
| | - Giray Enkavi
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Jesús Pérez-Gil
- Faculty of Biology, Department of Biochemistry and Molecular Biology, Research Institute “Hospital 12 de Octubre (imas12)”, Complutense University, Madrid, Spain
| | - Waldemar Kulig
- Department of Physics, University of Helsinki, Helsinki, Finland
- * E-mail: (WK); (IV)
| | - Ilpo Vattulainen
- Department of Physics, University of Helsinki, Helsinki, Finland
- * E-mail: (WK); (IV)
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Guagliardo R, Herman L, Penders J, Zamborlin A, De Keersmaecker H, Van de Vyver T, Verstraeten S, Merckx P, Mingeot-Leclercq MP, Echaide M, Pérez-Gil J, Stevens MM, De Smedt SC, Raemdonck K. Surfactant Protein B Promotes Cytosolic SiRNA Delivery by Adopting a Virus-like Mechanism of Action. ACS Nano 2021; 15:8095-8109. [PMID: 33724778 DOI: 10.1021/acsnano.0c04489] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
RNA therapeutics are poised to revolutionize medicine. To unlock the full potential of RNA drugs, safe and efficient (nano)formulations to deliver them inside target cells are required. Endosomal sequestration of nanocarriers represents a major bottleneck in nucleic acid delivery. Gaining more detailed information on the intracellular behavior of RNA nanocarriers is crucial to rationally develop delivery systems with improved therapeutic efficiency. Surfactant protein B (SP-B) is a key component of pulmonary surfactant (PS), essential for mammalian breathing. In contrast to the general belief that PS should be regarded as a barrier for inhaled nanomedicines, we recently discovered the ability of SP-B to promote gene silencing by siRNA-loaded and lipid-coated nanogels. However, the mechanisms governing this process are poorly understood. The major objective of this work was to obtain mechanistic insights into the SP-B-mediated cellular delivery of siRNA. To this end, we combined siRNA knockdown experiments, confocal microscopy, and focused ion beam scanning electron microscopy imaging in an in vitro non-small-cell lung carcinoma model with lipid mixing assays on vesicles that mimic the composition of (intra)cellular membranes. Our work highlights a strong correlation between SP-B-mediated fusion with anionic endosomal membranes and cytosolic siRNA delivery, a mode of action resembling that of certain viruses and virus-derived cell-penetrating peptides. Building on these gained insights, we optimized the SP-B proteolipid composition, which dramatically improved delivery efficiency. Altogether, our work provides a mechanistic understanding of SP-B-induced perturbation of intracellular membranes, offering opportunities to fuel the rational design of SP-B-inspired RNA nanoformulations for inhalation therapy.
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Affiliation(s)
- Roberta Guagliardo
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Lore Herman
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Jelle Penders
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Agata Zamborlin
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Herlinde De Keersmaecker
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
- Centre for Advanced Light Microscopy, Ghent University, 9000 Ghent, Belgium
| | - Thijs Van de Vyver
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Sandrine Verstraeten
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium
| | - Pieterjan Merckx
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Marie-Paule Mingeot-Leclercq
- Université Catholique de Louvain, Louvain Drug Research Institute, Pharmacologie Cellulaire et Moléculaire, Avenue E. Mounier 73, UCL B1.73.05, 1200 Brussels, Belgium
| | - Mercedes Echaide
- Departamento de Bioquímica y Biología Molecular, Facultad de Biologia, and Research Institute Hospital 12 de Octubre, Universidad Complutense, José Antonio Novais 12, 28040 Madrid, Spain
| | - Jesús Pérez-Gil
- Departamento de Bioquímica y Biología Molecular, Facultad de Biologia, and Research Institute Hospital 12 de Octubre, Universidad Complutense, José Antonio Novais 12, 28040 Madrid, Spain
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Stefaan C De Smedt
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium
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Autilio C, Echaide M, Cruz A, García-Mouton C, Hidalgo A, Da Silva E, De Luca D, Sørli JB, Pérez-Gil J. Author Correction: Molecular and biophysical mechanisms behind the enhancement of lung surfactant function during controlled therapeutic hypothermia. Sci Rep 2021; 11:9990. [PMID: 33953294 PMCID: PMC8100284 DOI: 10.1038/s41598-021-89532-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- C Autilio
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12), Faculty of Biology, Complutense University, Jose Antonio Novais 12, Madrid, Spain
| | - M Echaide
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12), Faculty of Biology, Complutense University, Jose Antonio Novais 12, Madrid, Spain
| | - A Cruz
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12), Faculty of Biology, Complutense University, Jose Antonio Novais 12, Madrid, Spain
| | - C García-Mouton
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12), Faculty of Biology, Complutense University, Jose Antonio Novais 12, Madrid, Spain
| | - A Hidalgo
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12), Faculty of Biology, Complutense University, Jose Antonio Novais 12, Madrid, Spain
| | - E Da Silva
- National Research Centre for the Working Environment, Copenhagen, Denmark.,Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - D De Luca
- Division of Pediatrics and Neonatal Critical Care, "A.Béclère" Medical Center, Paris Saclay University Hospitals, APHP, Paris, France.,Physiopathology and Therapeutic Innovation Unit-INSERM U999, South Paris-Saclay University, Paris, France
| | - Jorid B Sørli
- National Research Centre for the Working Environment, Copenhagen, Denmark
| | - J Pérez-Gil
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12), Faculty of Biology, Complutense University, Jose Antonio Novais 12, Madrid, Spain.
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Piñeiro-Hermida S, Autilio C, Martínez P, Bosch F, Pérez-Gil J, Blasco MA. Telomerase treatment prevents lung profibrotic pathologies associated with physiological aging. J Cell Biol 2021; 219:152010. [PMID: 32777016 PMCID: PMC7659728 DOI: 10.1083/jcb.202002120] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/23/2020] [Accepted: 07/17/2020] [Indexed: 02/08/2023] Open
Abstract
Short/dysfunctional telomeres are at the origin of idiopathic pulmonary fibrosis (IPF) in patients mutant for telomere maintenance genes. However, it remains unknown whether physiological aging leads to short telomeres in the lung, thus leading to IPF with aging. Here, we find that physiological aging in wild-type mice leads to telomere shortening and a reduced proliferative potential of alveolar type II cells and club cells, increased cellular senescence and DNA damage, increased fibroblast activation and collagen deposits, and impaired lung biophysics, suggestive of a fibrosis-like pathology. Treatment of both wild-type and telomerase-deficient mice with telomerase gene therapy prevented the onset of lung profibrotic pathologies. These findings suggest that short telomeres associated with physiological aging are at the origin of IPF and that a potential treatment for IPF based on telomerase activation would be of interest not only for patients with telomerase mutations but also for sporadic cases of IPF associated with physiological aging.
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Affiliation(s)
- Sergio Piñeiro-Hermida
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre, Madrid, Spain
| | - Chiara Autilio
- Department of Biochemistry and Molecular Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Paula Martínez
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre, Madrid, Spain
| | - Fátima Bosch
- Center of Animal Biotechnology and Gene Therapy, Department of Biochemistry and Molecular Biology, School of Veterinary Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Maria A Blasco
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre, Madrid, Spain
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Barriga A, Morán-Lalangui M, Castillo-Sánchez JC, Mingarro I, Pérez-Gil J, García-Álvarez B. Role of pulmonary surfactant protein Sp-C dimerization on membrane fragmentation: An emergent mechanism involved in lung defense and homeostasis. Biochim Biophys Acta Biomembr 2021; 1863:183572. [PMID: 33548215 DOI: 10.1016/j.bbamem.2021.183572] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/18/2021] [Accepted: 01/29/2021] [Indexed: 01/22/2023]
Abstract
Surfactant protein C (SP-C) is a protein present in the pulmonary surfactant system that is involved in the biophysical properties of this lipoprotein complex, but it also has a role in lung defense and homeostasis. In this article, we propose that the link between both functions could rely on the ability of SP-C to induce fragmentation of phospholipid membranes and generate small vesicles that serve as support to present different ligands to cells in the lungs. Our results using bimolecular fluorescence complementation and tunable resistive pulse sensing setups suggest that SP-C oligomerization could be the triggering event that causes membrane budding and nanovesiculation. As shown by fluorescence microscopy and flow cytometry, these vesicles are differentially assimilated by alveolar macrophages and alveolar type II cells, indicating distinct roles of these alveoli-resident cells in the processing of the SP-C- induced vesicles and their cargo. These results depict a more accurate picture of the mechanisms of this protein, which could be relevant for the comprehension of pulmonary pathologies and the development of new therapeutic approaches.
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Affiliation(s)
- Alejandro Barriga
- Department of Biochemistry and Molecular Biology, Faculty of Biology and Faculty of Chemistry, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - Michelle Morán-Lalangui
- Department of Biochemistry and Molecular Biology, Faculty of Biology and Faculty of Chemistry, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - José Carlos Castillo-Sánchez
- Department of Biochemistry and Molecular Biology, Faculty of Biology and Faculty of Chemistry, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - Ismael Mingarro
- Department of Biochemistry and Molecular Biology, Institute for Biotechnology and Biomedicine (BIOTECMED), University of Valencia, Valencia, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology and Faculty of Chemistry, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - Begoña García-Álvarez
- Department of Biochemistry and Molecular Biology, Faculty of Biology and Faculty of Chemistry, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Madrid, Spain.
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10
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García-Mouton C, Hidalgo A, Arroyo R, Echaide M, Cruz A, Pérez-Gil J. Pulmonary Surfactant and Drug Delivery: An Interface-Assisted Carrier to Deliver Surfactant Protein SP-D Into the Airways. Front Bioeng Biotechnol 2021; 8:613276. [PMID: 33542913 PMCID: PMC7853302 DOI: 10.3389/fbioe.2020.613276] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 10/01/2020] [Accepted: 12/21/2020] [Indexed: 12/16/2022] Open
Abstract
This work is focused on the potential use of pulmonary surfactant to deliver full-length recombinant human surfactant protein SP-D (rhSP-D) using the respiratory air-liquid interface as a shuttle. Surfactant protein D (SP-D) is a collectin protein present in the pulmonary surfactant (PS) system, involved in innate immune defense and surfactant homeostasis. It has been recently suggested as a potential therapeutic to alleviate inflammatory responses and lung diseases in preterm infants suffering from respiratory distress syndrome (RDS) or bronchopulmonary dysplasia (BPD). However, none of the current clinical surfactants used for surfactant replacement therapy (SRT) to treat RDS contain SP-D. The interaction of SP-D with surfactant components, the potential of PS as a respiratory drug delivery system and the possibility to produce recombinant versions of human SP-D, brings the possibility of delivering clinical surfactants supplemented with SP-D. Here, we used an in vitro setup that somehow emulates the respiratory air-liquid interface to explore this novel approach. It consists in two different compartments connected with a hydrated paper bridge forming a continuous interface. We firstly analyzed the adsorption and spreading of rhSP-D alone from one compartment to another over the air-liquid interface, observing low interfacial activity. Then, we studied the interfacial spreading of the protein co-administered with PS, both at different time periods or as a mixed formulation, and which oligomeric forms of rhSP-D better traveled associated with PS. The results presented here demonstrated that PS may transport rhSP-D long distances over air-liquid interfaces, either as a mixed formulation or separately in a close window time, opening the doors to empower the current clinical surfactants and SRT.
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Affiliation(s)
- Cristina García-Mouton
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Alberto Hidalgo
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Raquel Arroyo
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Mercedes Echaide
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Antonio Cruz
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Research Institute "Hospital 12 de Octubre (imas12)," Complutense University, Madrid, Spain
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11
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Martínez-Calle M, Parra-Ortiz E, Cruz A, Olmeda B, Pérez-Gil J. Towards the Molecular Mechanism of Pulmonary Surfactant Protein SP-B: At the Crossroad of Membrane Permeability and Interfacial Lipid Transfer. J Mol Biol 2020; 433:166749. [PMID: 33309854 DOI: 10.1016/j.jmb.2020.166749] [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] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/14/2020] [Accepted: 12/03/2020] [Indexed: 11/17/2022]
Abstract
Pulmonary surfactant is a lipid-protein complex that coats the alveolar air-liquid interface, enabling the proper functioning of lung mechanics. The hydrophobic surfactant protein SP-B, in particular, plays an indispensable role in promoting the rapid adsorption of phospholipids into the interface. For this, formation of SP-B ring-shaped assemblies seems to be important, as oligomerization could be required for the ability of the protein to generate membrane contacts and to mediate lipid transfer among surfactant structures. SP-B, together with the other hydrophobic surfactant protein SP-C, also promotes permeability of surfactant membranes to polar molecules although the molecular mechanisms underlying this property, as well as its relevance for the surface activity of the protein, remain undefined. In this work, the contribution of SP-B and SP-C to surfactant membrane permeability has been further investigated, by evaluation of the ability of differently-sized fluorescent polar probes to permeate through giant vesicles with different lipid/protein composition. Our results are consistent with the generation by SP-B of pores with defined size in surfactant membranes. Furthermore, incubation of surfactant with an anti-SP-B antibody not only blocked membrane permeability but also affected lipid transfer into the air-water interface, as observed in a captive bubble surfactometer device. Our findings include the identification of SP-C and anionic phospholipids as modulators required for maintaining native-like permeability features in pulmonary surfactant membranes. Proper permeability through membrane assemblies could be crucial to complement the overall role of surfactant in maintaining alveolar equilibrium, beyond its biophysical function in stabilizing the respiratory air-liquid interface.
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Affiliation(s)
- Marta Martínez-Calle
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain
| | - Elisa Parra-Ortiz
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain
| | - Antonio Cruz
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain
| | - Barbara Olmeda
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain.
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain
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12
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Testoni G, Olmeda B, Duran J, López-Rodríguez E, Aguilera M, Hernández-Álvarez MI, Prats N, Pérez-Gil J, Guinovart JJ. Pulmonary glycogen deficiency as a new potential cause of respiratory distress syndrome. Hum Mol Genet 2020; 29:3554-3565. [PMID: 33219378 DOI: 10.1093/hmg/ddaa249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/06/2020] [Accepted: 11/12/2020] [Indexed: 11/14/2022] Open
Abstract
The glycogenin knockout mouse is a model of Glycogen Storage Disease type XV. These animals show high perinatal mortality (90%) due to respiratory failure. The lungs of glycogenin-deficient embryos and P0 mice have a lower glycogen content than that of wild-type counterparts. Embryonic lungs were found to have decreased levels of mature surfactant proteins SP-B and SP-C, together with incomplete processing of precursors. Furthermore, non-surviving pups showed collapsed sacculi, which may be linked to a significantly reduced amount of surfactant proteins. A similar pattern was observed in glycogen synthase1-deficient mice, which are devoid of glycogen in the lungs and are also affected by high perinatal mortality due to atelectasis. These results indicate that glycogen availability is a key factor for the burst of surfactant production required to ensure correct lung expansion at the establishment of air breathing. Our findings confirm that glycogen deficiency in lungs can cause respiratory distress syndrome and suggest that mutations in glycogenin and glycogen synthase 1 genes may underlie cases of idiopathic neonatal death.
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Affiliation(s)
- Giorgia Testoni
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Bárbara Olmeda
- Department of Biochemistry, Faculty of Biology, and Research Institute of Hospital 12 de Octubre, Complutense University, 28040 Madrid, Spain
| | - Jordi Duran
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain.,Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
| | - Elena López-Rodríguez
- Institute of Functional Anatomy Wilhelm-Waldeyer-Haus, Charité - Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Mònica Aguilera
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - María Isabel Hernández-Álvarez
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain.,Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain
| | - Neus Prats
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology, and Research Institute of Hospital 12 de Octubre, Complutense University, 28040 Madrid, Spain
| | - Joan J Guinovart
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology, 08028 Barcelona, Spain.,Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28029 Madrid, Spain.,Department of Biochemistry and Molecular Biomedicine, University of Barcelona, 08028 Barcelona, Spain
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13
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Yazicioglu T, Mühlfeld C, Autilio C, Huang CK, Bär C, Dittrich-Breiholz O, Thum T, Pérez-Gil J, Schmiedl A, Brandenberger C. Aging impairs alveolar epithelial type II cell function in acute lung injury. Am J Physiol Lung Cell Mol Physiol 2020; 319:L755-L769. [DOI: 10.1152/ajplung.00093.2020] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Morbidity and mortality rates in acute lung injury (ALI) increase with age. As alveolar epithelial type II cells (AE2) are crucial for lung function and repair, we hypothesized that aging promotes senescence in AE2 and contributes to the severity and impaired regeneration in ALI. ALI was induced with 2.5 μg lipopolysaccharide/g body weight in young (3 mo) and old (18 mo) mice that were euthanized 24 h, 72 h, and 10 days later. Lung function, pulmonary surfactant activity, stereology, cell senescence, and single-cell RNA sequencing analyses were performed to investigate AE2 function in aging and ALI. In old mice, surfactant activity was severely impaired. A 60% mortality rate and lung function decline were observed in old, but not in young, mice with ALI. AE2 of young mice adapted to injury by increasing intracellular surfactant volume and proliferation rate. In old mice, however, this adaptive response was compromised, and AE2 of old mice showed signs of cell senescence, increased inflammatory signaling, and impaired surfactant metabolism in ALI. These findings provide evidence that ALI promotes a limited proliferation rate, increased inflammatory response, and surfactant dysfunction in old, but not in young, mice, supporting an impaired regenerative capacity and reduced survival rate in ALI with advancing age.
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Affiliation(s)
- Tolga Yazicioglu
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Christian Mühlfeld
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
| | - Chiara Autilio
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute “Hospital 12 de Octubre (imas12)”, Complutense University, Madrid, Spain
| | - Cheng-Kai Huang
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
| | - Christian Bär
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
- REBIRTH Center for Translational Regenerative Medicine, Hannover Medical School, Hannover, Germany
| | | | - Thomas Thum
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
- REBIRTH Center for Translational Regenerative Medicine, Hannover Medical School, Hannover, Germany
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute “Hospital 12 de Octubre (imas12)”, Complutense University, Madrid, Spain
| | - Andreas Schmiedl
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
| | - Christina Brandenberger
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
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14
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Autilio C, Echaide M, Shankar-Aguilera S, Bragado R, Amidani D, Salomone F, Pérez-Gil J, De Luca D. Surfactant Injury in the Early Phase of Severe Meconium Aspiration Syndrome. Am J Respir Cell Mol Biol 2020; 63:327-337. [PMID: 32348683 DOI: 10.1165/rcmb.2019-0413oc] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 12/22/2022] Open
Abstract
No in vivo data are available regarding the effect of meconium on human surfactant in the early stages of severe meconium aspiration syndrome (MAS). In the present study, we sought to characterize the changes in surfactant composition, function, and structure during the early phase of meconium injury. We designed a translational prospective cohort study of nonbronchoscopic BAL of neonates with severe MAS (n = 14) or no lung disease (n = 18). Surfactant lipids were analyzed by liquid chromatography-high-resolution mass spectrometry. Secretory phospholipase A2 subtypes IB, V, and X and SP-A (surfactant protein A) were assayed by ELISA. SP-B and SP-C were analyzed by Western blotting under both nonreducing and reducing conditions. Surfactant function was assessed by adsorption test and captive bubble surfactometry, and lung aeration was evaluated by semiquantitative lung ultrasound. Surfactant nanostructure was studied using cryo-EM and atomic force microscopy. Several changes in phospholipid subclasses were detected during MAS. Lysophosphatidylcholine species released by phospholipase A2 hydrolysis were increased. SP-B and SP-C were significantly increased together with some shorter immature forms of SP-B. Surfactant function was impaired and correlated with poor lung aeration. Surfactant nanostructure was significantly damaged in terms of vesicle size, tridimensional complexity, and compactness. Various alterations of surfactant phospholipids and proteins were detected in the early phase of severe meconium aspiration and were due to hydrolysis and inflammation and a defensive response. This impairs both surfactant structure and function, finally resulting in reduced lung aeration. These findings support the development of new surfactant protection and antiinflammatory strategies for severe MAS.
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Affiliation(s)
- Chiara Autilio
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain
| | - Mercedes Echaide
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain
| | - Shivani Shankar-Aguilera
- Division of Pediatrics and Neonatal Critical Care, A. Béclère Medical Center, Paris Saclay University Hospitals, APHP, Paris, France
| | - Rafael Bragado
- Research Institute "Instituto de Investigación Sanitaria-Fundación Jiménez Díaz (IIS FJD)", Madrid, Spain
| | - Davide Amidani
- Pharmacology and Toxicology Department Preclinical R&D, Chiesi Farmaceutici, Parma, Italy; and
| | - Fabrizio Salomone
- Pharmacology and Toxicology Department Preclinical R&D, Chiesi Farmaceutici, Parma, Italy; and
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology and Research Institute "Hospital 12 de Octubre (imas12)", Complutense University, Madrid, Spain
| | - Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, A. Béclère Medical Center, Paris Saclay University Hospitals, APHP, Paris, France.,Physiopathology and Therapeutic Innovation Unit, INSERM U999, Paris-Saclay University, Paris, France
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15
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Mato A, Blanco FG, Maestro B, Sanz JM, Pérez-Gil J, Prieto MA. Dissecting the Polyhydroxyalkanoate-Binding Domain of the PhaF Phasin: Rational Design of a Minimized Affinity Tag. Appl Environ Microbiol 2020; 86:e00570-20. [PMID: 32303541 PMCID: PMC7267194 DOI: 10.1128/aem.00570-20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 03/10/2020] [Accepted: 04/10/2020] [Indexed: 12/13/2022] Open
Abstract
Phasin PhaF from Pseudomonas putida consists of a modular protein whose N-terminal domain (BioF) has been demonstrated to be responsible for binding to the polyhydroxyalkanoate (PHA) granule. BioF has been exploited for biotechnological purposes as an affinity tag in the functionalization of PHA beads with fusion proteins both in vivo and in vitro The structural model of this domain suggests an amphipathic α-helical conformation with the hydrophobic residues facing the PHA granule. In this work, we analyzed the mean hydrophobicity and the hydrophobic moment of the native BioF tag to rationally design shorter versions that maintain affinity for the granule. Hybrid proteins containing the green fluorescent protein (GFP) fused to the BioF derivatives were studied for in vivo localization on PHA, stability on the surface of the PHA granule against pH, temperature, and ionic strength, and their possible influence on PHA synthesis. Based on the results obtained, a minimized BioF tag for PHA functionalization has been proposed (MinP) that retains similar binding properties but possesses an attractive biotechnological potential derived from its reduced size. The MinP tag was further validated by analyzing the functionality and stability of the fusion proteins MinP-β-galactosidase and MinP-CueO from Escherichia coliIMPORTANCE Polyhydroxyalkanoates (PHAs) are biocompatible, nontoxic, and biodegradable biopolymers with exceptional applications in the industrial and medical fields. The complex structure of the PHA granule can be exploited as a toolbox to display molecules of interest on their surface. Phasins, the most abundant group of proteins on the granule, have been employed as anchoring tags to obtain functionalized PHA beads for high-affinity bioseparation, enzyme immobilization, diagnostics, or cell targeting. Here, a shorter module based on the previously designed BioF tag has been demonstrated to maintain the affinity for the PHA granule, with higher stability and similar functionalization efficiency. The use of a 67% shorter peptide, which maintains the binding properties of the entire protein, constitutes an advantage for the immobilization of recombinant proteins on the PHA surface both in vitro and in vivo.
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Affiliation(s)
- Aranzazu Mato
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Madrid, Spain
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - Francisco G Blanco
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Madrid, Spain
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - Beatriz Maestro
- Host-Parasite Interplay in Pneumococcal Infection Group, Microbial and Plant Biotechnology Department, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Madrid, Spain
| | - Jesús M Sanz
- Host-Parasite Interplay in Pneumococcal Infection Group, Microbial and Plant Biotechnology Department, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain
| | - Jesús Pérez-Gil
- Biochemical and Molecular Biology Department, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, Madrid, Spain
| | - M Auxiliadora Prieto
- Polymer Biotechnology Group, Microbial and Plant Biotechnology Department, Centro de Investigaciones Biológicas Margarita Salas-CSIC, Madrid, Spain
- Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
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16
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Martinez-Calle M, Prieto M, Olmeda B, Fedorov A, Loura LM, Pérez-Gil J. Pulmonary surfactant protein SP-B nanorings induce the multilamellar organization of surfactant complexes. Biochimica et Biophysica Acta (BBA) - Biomembranes 2020; 1862:183216. [DOI: 10.1016/j.bbamem.2020.183216] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/17/2020] [Accepted: 02/02/2020] [Indexed: 11/25/2022]
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17
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Arroyo R, Echaide M, Wilmanowski R, Martín-González A, Batllori E, Galindo A, Rosenbaum JS, Moreno-Herrero F, Kingma PS, Pérez-Gil J. Structure and activity of human surfactant protein D from different natural sources. Am J Physiol Lung Cell Mol Physiol 2020; 319:L148-L158. [PMID: 32432921 DOI: 10.1152/ajplung.00007.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 01/09/2023] Open
Abstract
Surfactant protein D (SP-D) is a C-type lectin that participates in the innate immune defense of lungs. It binds pathogens through its carbohydrate recognition domain in a calcium-dependent manner. Human surfactant protein D (hSP-D) has been routinely obtained from bronchoalveolar lavage of patients suffering from pulmonary alveolar proteinosis (PAP) and from amniotic fluid (AF). As a consequence of the disease, hSP-D obtained from PAP is found in higher amounts and is mainly composed of higher order oligomeric forms. However, PAP-hSP-D has never been directly compared with nonpathological human protein in terms of structure and biological activity. Moreover, the quantitative distribution of the different hSP-D oligomeric forms in human protein obtained from a natural source has never been evaluated. In this work, we have determined the quantitative distribution of AF-hSP-D oligomers, characterized the sugars attached through the N-glycosylation site of the protein, and compared the activity of hSP-D from AF and PAP with respect to their ability to bind and agglutinate bacteria. We have found that fuzzy balls (40%) are the most abundant oligomeric form in AF-hSP-D, very closely followed by dodecamers (33%), with both together constituting 73% of the protein mass. The glycan attached to the N-glycosylation site was found to be composed of fucose, galactose, sialic acid, and N-acetylglucosamine. Finally, in the functional assays performed, hSP-D obtained from PAP showed higher potency, probably as a consequence of its higher proportion of large oligomers compared with hSP-D from AF.
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Affiliation(s)
- Raquel Arroyo
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain.,Research Institut "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | - Mercedes Echaide
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain.,Research Institut "Hospital 12 de Octubre (imas12)", Madrid, Spain
| | | | | | - Emma Batllori
- Research Institut "Hospital 12 de Octubre (imas12)", Madrid, Spain.,Department of Obstetrics and Gyneacology, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Alberto Galindo
- Research Institut "Hospital 12 de Octubre (imas12)", Madrid, Spain.,Department of Obstetrics and Gyneacology, Hospital Universitario 12 de Octubre, Madrid, Spain.,Fetal Medicine Unit-SAMID, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Jan S Rosenbaum
- Research and Development Department, Airway Therapeutics LLC, Cincinnati, Ohio
| | - Fernando Moreno-Herrero
- Department of Macromolecular Structures, National Center of Biotechnology, CSIC, Madrid, Spain
| | - Paul S Kingma
- Division of Neonatology and Pulmonary Biology, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain.,Research Institut "Hospital 12 de Octubre (imas12)", Madrid, Spain
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18
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Liekkinen J, Enkavi G, Javanainen M, Olmeda B, Pérez-Gil J, Vattulainen I. Pulmonary Surfactant Lipid Reorganization Induced by the Adsorption of the Oligomeric Surfactant Protein B Complex. J Mol Biol 2020; 432:3251-3268. [DOI: 10.1016/j.jmb.2020.02.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/22/2020] [Accepted: 02/24/2020] [Indexed: 12/11/2022]
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19
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Oeo-Santos C, López-Rodríguez JC, García-Mouton C, San Segundo-Acosta P, Jurado A, Moreno-Aguilar C, García-Álvarez B, Pérez-Gil J, Villalba M, Barderas R, Cruz A. Biophysical and biological impact on the structure and IgE-binding of the interaction of the olive pollen allergen Ole e 7 with lipids. Biochim Biophys Acta Biomembr 2020; 1862:183258. [PMID: 32142819 DOI: 10.1016/j.bbamem.2020.183258] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/19/2020] [Accepted: 03/02/2020] [Indexed: 01/08/2023]
Abstract
Ole e 7 allergen from Olea europaea pollen possesses a major clinical relevance because it produces severe symptoms, such as anaphylaxis, in allergic patients exposed to high olive pollen counts. Ole e 7 is a non-specific lipid transfer protein (nsLTP) characterized by the presence of a tunnel-like hydrophobic cavity, which may be suitable for hosting and, thus, transporting lipids -as it has been described for other nsLTPs-. The identification of the primary amino acid sequence of Ole e 7, and its production as a recombinant allergen, allowed characterizing its lipid-binding properties and its effect at air-liquid interfaces. Fluorescence and interferometry experiments were performed using different phospholipid molecular species and free fatty acids to analyse the lipid-binding ability and specificity of the allergen. Molecular modelling of the allergen was used to determine the potential regions involved in lipid interaction. Changes in Ole e 7 structure after lipid interaction were analysed by circular dichroism. Changes in the IgE binding upon ligand interaction were determined by ELISA. Wilhelmy balance measurements and fluorescence surfactant adsorption tests were performed to analyse the surface activity of the allergen. Using these different approaches, we have demonstrated the ability of Ole e 7 to interact and bind to a wide range of lipids, especially negatively charged phospholipids and oleic acid. We have also identified the protein structural regions and the residues potentially involved in that interaction, suggesting how lipid-protein interactions could define the behaviour of the allergen once inhaled at the airways.
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Affiliation(s)
- Carmen Oeo-Santos
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Juan Carlos López-Rodríguez
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Cristina García-Mouton
- Departamento Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas and Research Institute "Hospital 12 de Octubre (imas12)", Universidad Complutense, 28040 Madrid, Spain
| | - Pablo San Segundo-Acosta
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Aurora Jurado
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Hospital Universitario Reina Sofía, Universidad de Córdoba, 14004 Córdoba, Spain; Allergy Network ARADyAL, Instituto de Salud Carlos III, Madrid, Spain
| | - Carmen Moreno-Aguilar
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Hospital Universitario Reina Sofía, Universidad de Córdoba, 14004 Córdoba, Spain; Allergy Network ARADyAL, Instituto de Salud Carlos III, Madrid, Spain
| | - Begoña García-Álvarez
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Jesús Pérez-Gil
- Departamento Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas and Research Institute "Hospital 12 de Octubre (imas12)", Universidad Complutense, 28040 Madrid, Spain
| | - Mayte Villalba
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain; Allergy Network ARADyAL, Instituto de Salud Carlos III, Madrid, Spain
| | - Rodrigo Barderas
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain; Chronic Disease Programme, UFIEC, Instituto de Salud Carlos III, 28220 Majadahonda, Madrid, Spain.
| | - Antonio Cruz
- Departamento Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas and Research Institute "Hospital 12 de Octubre (imas12)", Universidad Complutense, 28040 Madrid, Spain.
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Arroyo R, Khan MA, Echaide M, Pérez-Gil J, Palaniyar N. SP-D attenuates LPS-induced formation of human neutrophil extracellular traps (NETs), protecting pulmonary surfactant inactivation by NETs. Commun Biol 2019; 2:470. [PMID: 31872075 PMCID: PMC6915734 DOI: 10.1038/s42003-019-0662-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 09/30/2019] [Indexed: 02/08/2023] Open
Abstract
An exacerbated amount of neutrophil extracellular traps (NETs) can cause dysfunction of systems during inflammation. However, host proteins and factors that suppress NET formation (NETosis) are not clearly identified. Here we show that an innate immune collectin, pulmonary surfactant protein-D (SP-D), attenuates lipopolysaccharide (LPS)-mediated NETosis in human neutrophils by binding to LPS. SP-D deficiency in mice (Sftpd-/-) leads to excess NET formation in the lungs during LPS-mediated inflammation. In the absence of SP-D, NETs inhibit the surface-active properties of lung surfactant, essential to prevent the collapse of alveoli, the air breathing structures of the lungs. SP-D reverses NET-mediated inhibition of surfactant and restores the biophysical properties of surfactant. To the best of our knowledge, this study establishes for the first time that (i) SP-D suppresses LPS-mediated NETosis, (ii) NETs inhibit pulmonary surfactant function in the absence of SP-D, and (iii) SP-D can restore NET-mediated inhibition of the surfactant system.
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Affiliation(s)
- Raquel Arroyo
- 1Department of Biochemistry, Faculty of Biology, Complutense University, 28040 Madrid, Spain
- Research Institute "Hospital 12 de Octubre (imas12)", 28041 Madrid, Spain
- 3Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON M5G 1X8 Canada
| | - Meraj Alam Khan
- 3Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON M5G 1X8 Canada
- 4Department of Laboratory Medicine and Pathobiology, and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON Canada
| | - Mercedes Echaide
- 1Department of Biochemistry, Faculty of Biology, Complutense University, 28040 Madrid, Spain
- Research Institute "Hospital 12 de Octubre (imas12)", 28041 Madrid, Spain
| | - Jesús Pérez-Gil
- 1Department of Biochemistry, Faculty of Biology, Complutense University, 28040 Madrid, Spain
- Research Institute "Hospital 12 de Octubre (imas12)", 28041 Madrid, Spain
| | - Nades Palaniyar
- 3Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON M5G 1X8 Canada
- 4Department of Laboratory Medicine and Pathobiology, and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON Canada
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Garcia-Mouton C, Hidalgo A, Cruz A, Pérez-Gil J. The Lord of the Lungs: The essential role of pulmonary surfactant upon inhalation of nanoparticles. Eur J Pharm Biopharm 2019; 144:230-243. [PMID: 31560956 DOI: 10.1016/j.ejpb.2019.09.020] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/21/2019] [Accepted: 09/23/2019] [Indexed: 01/16/2023]
Abstract
The rapid development of nanotechnology is opening a huge world of promising possibilities in healthcare, but this is also increasing the necessity to study the potential risk of nanoparticles on public health and the environment. Since the main route for airborne particles to enter into our organism is through the lungs, it has become essential to prove that the nanoparticles generated by human activities do not compromise the respiratory function. This review explains the key role of pulmonary surfactant to sustain the normal function of breathing, as well as the stability and immunity of lungs. Particular emphasis is made on the importance of analysing the features of nanoparticles, defining their interactions with surfactant and unravelling the mutual effects. The implication of the nanoparticle-surfactant interaction on the function and fate of both structures is described, as well as the main in vitro methodologies used to evaluate this interaction. Finally, the incorporation of pulmonary surfactant in appropriate in vitro models is used in order to obtain an extensive understanding of how nanoparticles may act in the context of the lung. The main goal of this review is to offer a general view on inhaled nanoparticles and their effects on the structure and function of lungs derived from their interaction with the pulmonary surfactant system.
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Affiliation(s)
- Cristina Garcia-Mouton
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre", Complutense University, 28040 Madrid, Spain
| | - Alberto Hidalgo
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre", Complutense University, 28040 Madrid, Spain
| | - Antonio Cruz
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre", Complutense University, 28040 Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute "Hospital 12 de Octubre", Complutense University, 28040 Madrid, Spain.
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22
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Martínez-Calle M, Alonso A, Pérez-Gil J, Olmeda B. Native supramolecular protein complexes in pulmonary surfactant: Evidences for SP-A/SP-B interactions. J Proteomics 2019; 207:103466. [DOI: 10.1016/j.jprot.2019.103466] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/08/2019] [Accepted: 07/22/2019] [Indexed: 12/21/2022]
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Autilio C, Pérez-Gil J. Understanding the principle biophysics concepts of pulmonary surfactant in health and disease. Arch Dis Child Fetal Neonatal Ed 2019; 104:F443-F451. [PMID: 30552091 DOI: 10.1136/archdischild-2018-315413] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 11/03/2022]
Abstract
Pulmonary surfactant (PS) is a lipid-protein complex essential to stabilise the delicate structure of mammalian alveoli along with successive compression-expansion respiratory cycles. To do so, surfactant reduces dramatically surface tension at the air-liquid interface, an activity that depends critically on a proper lipid composition and the presence of some specific surfactant proteins. Lack or dysfunction of this system is associated with severe respiratory pathologies, which are in some cases treated by supplementation with exogenous surfactant materials. The biophysical function and performance of PS, in health and disease, are directly influenced by its composition, structure and mechanical properties. This review summarises the main biophysics concepts behind the mechanisms that define surfactant function in a healthy lung and in pathological situations. It also revises some of the most useful biophysical techniques that provide information about surfactant-related processes. Finally, translational biophysics will be invoked to illustrate how biophysical studies may contribute to understand the role of surfactant in health and disease and to design better surfactant-based therapeutic approaches.
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Affiliation(s)
- Chiara Autilio
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, Madrid, Spain.,Research Institute "Hospital 12 de Octubre", Complutense University, Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, Madrid, Spain.,Research Institute "Hospital 12 de Octubre", Complutense University, Madrid, Spain
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24
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Mato A, Tarazona NA, Hidalgo A, Cruz A, Jiménez M, Pérez-Gil J, Prieto MA. Interfacial Activity of Phasin PhaF from Pseudomonas putida KT2440 at Hydrophobic-Hydrophilic Biointerfaces. Langmuir 2019; 35:678-686. [PMID: 30580527 DOI: 10.1021/acs.langmuir.8b03036] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phasins, the major proteins coating polyhydroxyalkanoate (PHA) granules, have been proposed as suitable biosurfactants for multiple applications because of their amphiphilic nature. In this work, we analyzed the interfacial activity of the amphiphilic α-helical phasin PhaF from Pseudomonas putida KT2440 at different hydrophobic-hydrophilic interfacial environments. The binding of PhaF to surfaces containing PHA or phospholipids, postulated as structural components of PHA granules, was confirmed in vitro using supported lipid bilayers and confocal microscopy, with polyhydroxyoctanoate- co-hexanoate P(HO- co-HHx) and Escherichia coli lipid extract as model systems. The surfactant-like capabilities of PhaF were determined by measuring changes in surface pressure in Langmuir devices. PhaF spontaneously adsorbed at the air-water interface, reducing the surface tension from 72 mN/m (water surface tension at 25 °C) to 50 mN/m. The differences in the adsorption of the protein in the presence of different phospholipid films showed a marked preference for phosphatidylglycerol species, such as 1-palmitoyl-2-oleoyl- sn-glycero-3-phosphoglycerol. The PHA-binding domain of PhaF (BioF) conserved a similar surface activity to PhaF, suggesting that it is responsible for the surfactant properties of the whole protein. These new findings not only increase our knowledge about the role of phasins in the PHA machinery but also open new outlooks for the application of these proteins as biosurfactants.
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Affiliation(s)
| | | | - Alberto Hidalgo
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas , Universidad Complutense de Madrid , 28040 Madrid , Spain
| | - Antonio Cruz
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas , Universidad Complutense de Madrid , 28040 Madrid , Spain
| | | | - Jesús Pérez-Gil
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas , Universidad Complutense de Madrid , 28040 Madrid , Spain
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25
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Lopez-Rodriguez E, Roldan N, Garcia-Alvarez B, Pérez-Gil J. Protein and lipid fingerprinting of native-like membrane complexes by combining TLC and protein electrophoresis. J Lipid Res 2018; 60:430-435. [PMID: 30463985 DOI: 10.1194/jlr.d090639] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Indexed: 11/20/2022] Open
Abstract
TLC has traditionally been used to analyze lipids isolated from membrane complexes. Here, we describe a method based on the combination of TLC and SDS-PAGE to qualitatively analyze the protein/lipid profile of membrane complexes such as those of lung surfactant. For this purpose, native lung surfactant was applied onto a silica TLC plate in the form of an aqueous suspension, preserving not only hydrophilic proteins associated with lipids but also native protein-lipid interactions. Using native membrane complexes in TLC allows the differential migration of lipids and their separation from the protein components. As a result, (partly) delipidated protein-enriched bands can be visualized and analyzed by SDS-PAGE to identify proteins originally associated with lipids. Interestingly, the hydrophobic surfactant protein C, which interacts tightly with lipids in native membrane complexes, migrates through the TLC plate, configuring specific bands that differ from those corresponding to lipids or proteins. This method therefore allows the detection and analysis of strong native-like protein-lipid interactions.
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Affiliation(s)
- Elena Lopez-Rodriguez
- Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany.,Department of Biochemistry Faculty of Biology, Complutense University of Madrid, Madrid, Spain
| | - Nuria Roldan
- Department of Biochemistry Faculty of Biology, Complutense University of Madrid, Madrid, Spain.,Hospital 12 Octubre Research Institute Madrid, Spain
| | - Begoña Garcia-Alvarez
- Department of Biochemistry Faculty of Biology, Complutense University of Madrid, Madrid, Spain.,Hospital 12 Octubre Research Institute Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry Faculty of Biology, Complutense University of Madrid, Madrid, Spain .,Hospital 12 Octubre Research Institute Madrid, Spain
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26
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Guagliardo R, Pérez-Gil J, De Smedt S, Raemdonck K. Pulmonary surfactant and drug delivery: Focusing on the role of surfactant proteins. J Control Release 2018; 291:116-126. [PMID: 30321577 DOI: 10.1016/j.jconrel.2018.10.012] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [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: 07/09/2018] [Revised: 10/06/2018] [Accepted: 10/08/2018] [Indexed: 11/30/2022]
Abstract
Pulmonary surfactant (PS) has been extensively studied because of its primary role in mammalian breathing. The deposition of this surface-active material at the alveolar air-water interface is essential to lower surface tension, thus avoiding alveolar collapse during expiration. In addition, PS is involved in host defense, facilitating the clearance of potentially harmful particulates. PS has a unique composition, including 92% of lipids and 8% of surfactant proteins (SPs) by mass. Although they constitute the minor fraction, SPs to a large extent orchestrate PS-related functions. PS contains four surfactant proteins (SPs) that can be structurally and functionally divided in two groups, i.e. the large hydrophilic SP-A and SP-D and the smaller hydrophobic SP-B and SP-C. The former belong to the family of collectins and are involved in opsonization processes, thus promoting uptake of pathogens and (nano)particles by phagocytic cell types. The latter SPs regulate interfacial surfactant adsorption dynamics, facilitating (phospho)lipid transfer and membrane fusion processes. In the context of pulmonary drug delivery, the exploitation of PS as a carrier to promote drug spreading along the alveolar interface is gaining interest. In addition, recent studies investigated the interaction of PS with drug-loaded nanoparticles (nanomedicines) following pulmonary administration, which strongly influences their biological fate, drug delivery efficiency and toxicological profile. Interestingly, the specific biophysical mode-of-action of the four SPs affect the drug delivery process of nanomedicines both on the extra-and intracellular level, modulating pulmonary distribution, cell targeting and intracellular delivery. This knowledge can be harnessed to exploit SPs for the design of unique and bio-inspired drug delivery strategies.
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Affiliation(s)
- Roberta Guagliardo
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Jesús Pérez-Gil
- Departamento de Bioquimica y Biologia Molecular, Facultad de Biologia, Research Institute Hospital 12 Octubre, Universidad Complutense, José Antonio Novais 2, 28040 Madrid, Spain.
| | - Stefaan De Smedt
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
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27
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Lugones Y, Blanco O, López-Rodríguez E, Echaide M, Cruz A, Pérez-Gil J. Inhibition and counterinhibition of Surfacen, a clinical lung surfactant of natural origin. PLoS One 2018; 13:e0204050. [PMID: 30235278 PMCID: PMC6147439 DOI: 10.1371/journal.pone.0204050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 08/31/2018] [Indexed: 12/23/2022] Open
Abstract
Inactivation of pulmonary surfactant by different components such as serum, cholesterol or meconium contributes to severe respiratory pathologies through destabilization and collapse of airspaces. Recent studies have analyzed in detail how the interfacial properties of natural surfactant purified from animal lungs are altered as a consequence of its exposure to serum proteins or meconium-mobilized cholesterol. It has been also demonstrated that pre-exposure of surfactant to polymers such as hyaluronic acid provides resistance to inactivation by multiple inhibitory agents. In the current work, we have extended these studies to the analysis of Surfacen, a clinical surfactant currently in use to rescue premature babies suffering or at risk of respiratory distress due to congenital lack of surfactant. This surfactant is also strongly inhibited by both meconium and serum when tested in the captive bubble surfactometer (CBS) under conditions mimicking respiratory dynamics. As it occurs with native surfactant, Surfacen is markedly protected from inhibition by pre-exposure to hyaluronic acid, confirming that clinical surfactants can be improved to treat pathologies associated with strongly deactivating contexts, such as those associated with lung injury and inflammation. Remarkably, we found that, under physiologically-mimicking conditions, a cholesterol-free clinical surfactant such as Surfacen is less susceptible to inhibition by cholesterol-mobilizing environments than cholesterol-containing natural surfactant, as a consequence of a markedly reduced susceptibility to incorporation of exogenous cholesterol.
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Affiliation(s)
- Yuliannis Lugones
- Dept. Biochemistry, Fac. of Biology, Complutense University, Madrid, Spain
- Centro Nacional de Sanidad Agropecuaria, Mayabeque, Cuba
| | - Odalys Blanco
- Dept. Biochemistry, Fac. of Biology, Complutense University, Madrid, Spain
- Centro Nacional de Sanidad Agropecuaria, Mayabeque, Cuba
| | | | - Mercedes Echaide
- Dept. Biochemistry, Fac. of Biology, Complutense University, Madrid, Spain
- Research Institut “Hospital 12 de Octubre (imas12)”, Madrid, Spain
| | - Antonio Cruz
- Dept. Biochemistry, Fac. of Biology, Complutense University, Madrid, Spain
- Research Institut “Hospital 12 de Octubre (imas12)”, Madrid, Spain
| | - Jesús Pérez-Gil
- Dept. Biochemistry, Fac. of Biology, Complutense University, Madrid, Spain
- Research Institut “Hospital 12 de Octubre (imas12)”, Madrid, Spain
- * E-mail:
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Arroyo R, Martín-González A, Echaide M, Jain A, Brondyk W, Rosenbaum J, Moreno-Herrero F, Pérez-Gil J. Supramolecular Assembly of Human Pulmonary Surfactant Protein SP-D. J Mol Biol 2018; 430:1495-1509. [DOI: 10.1016/j.jmb.2018.03.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 11/15/2022]
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29
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Cabré EJ, Martínez-Calle M, Prieto M, Fedorov A, Olmeda B, Loura LMS, Pérez-Gil J. Homo- and hetero-oligomerization of hydrophobic pulmonary surfactant proteins SP-B and SP-C in surfactant phospholipid membranes. J Biol Chem 2018; 293:9399-9411. [PMID: 29700110 DOI: 10.1074/jbc.ra117.000222] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 03/28/2018] [Indexed: 11/06/2022] Open
Abstract
Pulmonary surfactant is a lipid/protein mixture that reduces surface tension at the respiratory air-water interface in lungs. Among its nonlipidic components are pulmonary surfactant-associated proteins B and C (SP-B and SP-C, respectively). These highly hydrophobic proteins are required for normal pulmonary surfactant function, and whereas past literature works have suggested possible SP-B/SP-C interactions and a reciprocal modulation effect, no direct evidence has been yet identified. In this work, we report an extensive fluorescence spectroscopy study of both intramolecular and intermolecular SP-B and SP-C interactions, using a combination of quenching and FRET steady-state and time-resolved methodologies. These proteins are compartmentalized in full surfactant membranes but not in pure 1-palmitoyl-2-oleoylphosphatidylcholine (POPC) vesicles, in accordance with their previously described preference for liquid disordered phases. From the observed static self-quenching and homo-FRET of BODIPY-FL labeled SP-B, we conclude that this protein forms homoaggregates at low concentration (lipid:protein ratio, 1:1000). Increases in polarization of BODIPY-FL SP-B and steady-state intensity of WT SP-B were observed upon incorporation of under-stoichiometric amounts of WT SP-C. Conversely, Marina Blue-labeled SP-C is quenched by over-stoichiometric amounts of WT SP-B, whereas under-stoichiometric concentrations of the latter actually increase SP-C emission. Time-resolved hetero-FRET from Marina Blue SP-C to BODIPY-FL SP-B confirm distinct protein aggregation behaviors with varying SP-B concentration. Based on these multiple observations, we propose a model for SP-B/SP-C interactions, where SP-C might induce conformational changes on SP-B complexes, affecting its aggregation state. The conclusions inferred from the present work shed light on the synergic functionality of both proteins in the pulmonary surfactant system.
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Affiliation(s)
- Elisa J Cabré
- From the Department of Biochemistry, Faculty of Biology, Complutense University, Madrid 28040, Spain
| | - Marta Martínez-Calle
- From the Department of Biochemistry, Faculty of Biology, Complutense University, Madrid 28040, Spain.,the Hospital 12 Octubre Research Institute, Madrid 28041, Spain
| | - Manuel Prieto
- the CQFM-IN and iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisboa 1049-001, Portugal
| | - Alexander Fedorov
- the CQFM-IN and iBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisboa 1049-001, Portugal
| | - Bárbara Olmeda
- From the Department of Biochemistry, Faculty of Biology, Complutense University, Madrid 28040, Spain.,the Hospital 12 Octubre Research Institute, Madrid 28041, Spain
| | - Luís M S Loura
- the Faculty of Pharmacy, University of Coimbra, Coimbra 3000-548, Portugal, and .,the Centro de Química de Coimbra, University of Coimbra, Coimbra 3004-535, Portugal
| | - Jesús Pérez-Gil
- From the Department of Biochemistry, Faculty of Biology, Complutense University, Madrid 28040, Spain, .,the Hospital 12 Octubre Research Institute, Madrid 28041, Spain
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30
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Autilio C, Echaide M, De Luca D, Pérez-Gil J. Controlled hypothermia may improve surfactant function in asphyxiated neonates with or without meconium aspiration syndrome. PLoS One 2018; 13:e0192295. [PMID: 29420583 PMCID: PMC5805292 DOI: 10.1371/journal.pone.0192295] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 01/22/2018] [Indexed: 01/14/2023] Open
Abstract
Background Whole-body hypothermia (WBH) is used to improve neurological outcomes in perinatal asphyxia. Recent studies suggested a beneficial effect of hypothermia for some types of acute respiratory failure. However, no data are available about the biophysical function of human surfactant during WBH. We investigated whether WBH improves surfactant biophysical properties in asphyxiated neonates with or without meconium aspiration syndrome (MAS). Methods Non-bronchoscopic bronchoalveolar lavage (BAL) has been collected from 10 asphyxiated neonates (2 with MAS, 8 with no lung disease (NLD)) at different time-points (pre-WBH, 24h, 48h, 72h of WBH and post-WBH). Surfactant was extracted and tested by captive bubble surfactometry (CBS) in triplicate, at 37°C and 33.5°C, through initial adsorption and dynamic compression-expansion cycling. Phosphatidylcholine and cholesterol were assayed using enzymatic methods. Clinical data were recorded in real-time. Results Minimum surface tension under dynamic testing was significantly improved as assessed at 33.5°C compared with its behavior at 37°C in NLD neonates: the difference was evident after at least 72h of WBH and remained significant at 6h after rewarming (72h: p = 0.009; rewarming: p = 0.040). Similar results were obtained in MAS patients whose surfactant activity improved already at 48h of hypothermia. Total cholesterol showed a trend to increase at the first 24-48h of hypothermia in NLD patients. Conversely, hypothermia seemed to reduce the excess of exogenous cholesterol in MAS surfactant. Conclusions Surfactant biophysical properties may improve after 48-72h of WBH in asphyxiated neonates and the improvement is maintained shortly after rewarming. Due to study limitations, further studies are warranted to better clarify the effects of hypothermia on surfactant activity.
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Affiliation(s)
- Chiara Autilio
- Department of Biochemistry, Faculty of Biology and Research Institute Hospital 12 de Octubre, Complutense University, Madrid, Spain
- Laboratory of Clinical Molecular Biology, Department of Laboratory Medicine, “A. Gemelli” University Hospital, Catholic University of the Sacred Heart, Rome, Italy
| | - Mercedes Echaide
- Department of Biochemistry, Faculty of Biology and Research Institute Hospital 12 de Octubre, Complutense University, Madrid, Spain
| | - Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, “A. Béclère” Medical Center, South Paris University Hospitals, APHP, Paris, France
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology and Research Institute Hospital 12 de Octubre, Complutense University, Madrid, Spain
- * E-mail:
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Castillo-Sanchez JC, Roldan N, García-Álvarez B, Batllori-Badia E, Galindo A, Cruz A, Pérez-Gil J. Looking for Groundbreaking Structural and Functional Features in the Lung Surfactant System using a Surface-Active Agent Purified from Human Amniotic Fluid. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Roldan N, Pérez-Gil J, Morrow MR, García-Álvarez B. Divide & Conquer: Surfactant Protein SP-C and Cholesterol Modulate Phase Segregation in Lung Surfactant. Biophys J 2017; 113:847-859. [PMID: 28834721 PMCID: PMC5567427 DOI: 10.1016/j.bpj.2017.06.059] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 05/15/2017] [Accepted: 06/26/2017] [Indexed: 02/04/2023] Open
Abstract
Lung surfactant (LS) is an essential system supporting the respiratory function. Cholesterol can be deleterious for LS function, a condition that is reversed by the presence of the lipopeptide SP-C. In this work, the structure of LS-mimicking membranes has been analyzed under the combined effect of SP-C and cholesterol by deuterium NMR and phosphorus NMR and by electron spin resonance. Our results show that SP-C induces phase segregation at 37°C, resulting in an ordered phase with spectral features resembling an interdigitated state enriched in dipalmitoylphosphatidylcholine, a liquid-crystalline bilayer phase, and an extremely mobile phase consistent with small vesicles or micelles. In the presence of cholesterol, POPC and POPG motion seem to be more hindered by SP-C than dipalmitoylphosphatidylcholine. The use of deuterated cholesterol did not show signs of specific interactions that could be attributed to SP-C or to the other hydrophobic surfactant protein SP-B. Palmitoylation of SP-C had an indirect effect on the extent of protein-lipid perturbations by stabilizing SP-C structure, and seemed to be important to maximize differences among the lipids participating in each phase. These results shed some light on how SP-C-induced lipid perturbations can alter membrane structure to sustain LS functionality at the air-liquid interface.
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Affiliation(s)
- Nuria Roldan
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Healthcare Research Institute of Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Healthcare Research Institute of Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Michael R Morrow
- Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Begoña García-Álvarez
- Department of Biochemistry, Faculty of Biology, Complutense University, Madrid, Spain; Healthcare Research Institute of Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain.
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33
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Carravilla P, Cruz A, Martin-Ugarte I, Oar-Arteta IR, Torralba J, Apellaniz B, Pérez-Gil J, Requejo-Isidro J, Huarte N, Nieva JL. Effects of HIV-1 gp41-Derived Virucidal Peptides on Virus-like Lipid Membranes. Biophys J 2017; 113:1301-1310. [PMID: 28797705 DOI: 10.1016/j.bpj.2017.06.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 06/22/2017] [Accepted: 06/29/2017] [Indexed: 12/11/2022] Open
Abstract
Membrane fusion induced by the envelope glycoprotein enables the intracellular replication of HIV-1; hence, this process constitutes a major target for antiretroviral compounds. It has been proposed that peptides having propensity to interact with membrane interfaces might exert broad antiviral activity against enveloped viruses. To test this hypothesis, in this contribution we have analyzed the antiviral effects of peptides derived from the membrane-proximal external region and the transmembrane domain of the envelope glycoprotein subunit gp41, which display different degrees of interfacial hydrophobicity. Our data support the virucidal activity of a region that combines hydrophobic-at-interface membrane-proximal external region aromatics with hydrophobic residues of the transmembrane domain, and contains the absolutely conserved 679LWYIK/R683 sequence, proposed to embody a "cholesterol recognition/interaction amino acid consensus" motif. We further sought to correlate the antiviral activity of these peptides and their effects on membranes that mimic lipid composition and biophysical properties of the viral envelope. The data revealed that peptides endowed with virucidal activity were membrane active and induced permeabilization and fusion of virus-like lipid vesicles. In addition, they modulated lipid packing and miscibility of laterally segregated liquid domains, two properties that depend on the high cholesterol content of the viral membrane. Thus, the overall experimental evidence is consistent with a pattern of HIV inhibition that involves direct alteration of the physical chemistry of the virus membrane. Furthermore, the sequence-dependent effects observed might guide the development of new virucidal peptides.
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Affiliation(s)
- Pablo Carravilla
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Antonio Cruz
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, Madrid, Spain; Healthcare Research Institute of Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Itziar Martin-Ugarte
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Itziar R Oar-Arteta
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Johanna Torralba
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Beatriz Apellaniz
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Complutense University, Madrid, Spain; Healthcare Research Institute of Hospital 12 de Octubre, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - José Requejo-Isidro
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Nerea Huarte
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain.
| | - José L Nieva
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain.
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Lemke A, Castillo-Sánchez JC, Prodinger F, Ceranic A, Hennerbichler-Lugscheider S, Pérez-Gil J, Redl H, Wolbank S. Human amniotic membrane as newly identified source of amniotic fluid pulmonary surfactant. Sci Rep 2017; 7:6406. [PMID: 28743969 PMCID: PMC5527005 DOI: 10.1038/s41598-017-06402-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/13/2017] [Indexed: 01/23/2023] Open
Abstract
Pulmonary surfactant (PS) reduces surface tension at the air-liquid interface in the alveolar epithelium of the lung, which is required for breathing and for the pulmonary maturity of the developing foetus. However, the origin of PS had never been thoroughly investigated, although it was assumed to be secreted from the foetal developing lung. Human amniotic membrane (hAM), particularly its epithelial cell layer, composes the amniotic sac enclosing the amniotic fluid. In this study, we therefore aimed to investigate a potential contribution of the cellular components of the hAM to pulmonary surfactant found in amniotic fluid. We identified that cells within the native membrane contain lamellar bodies and express all four surfactant proteins as well as ABCA3. Lipidomic profiling by nanoESI – MS/MS revealed the presence of the essential lipid species as found in PS. Also, the biophysical activity of conditioned cell culture supernatant obtained from hAM was tested with captive bubble surfactometry. hAM supernatant showed the ability to reduce surface tension, similar to human PS obtained from bronchoalveolar lavage. This means that hAM produces the essential PS-associated components and can therefore contribute as second potential source of PS in amniotic fluid aside from the foetal lung.
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Affiliation(s)
- Angela Lemke
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology / AUVA Research Center, Vienna, Austria. .,Austrian Cluster for Tissue Regeneration, Vienna, Austria.
| | - José Carlos Castillo-Sánchez
- Departamento de Bioquimica, Facultad de Biologia, and Instituto de Investigación Hospital Doce de Octubre, Universidad Complutense, Madrid, Spain
| | - Florian Prodinger
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Asja Ceranic
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | | | - Jesús Pérez-Gil
- Departamento de Bioquimica, Facultad de Biologia, and Instituto de Investigación Hospital Doce de Octubre, Universidad Complutense, Madrid, Spain
| | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology / AUVA Research Center, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Susanne Wolbank
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology / AUVA Research Center, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria
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Roldan N, Nyholm TKM, Slotte JP, Pérez-Gil J, García-Álvarez B. Effect of Lung Surfactant Protein SP-C and SP-C-Promoted Membrane Fragmentation on Cholesterol Dynamics. Biophys J 2017; 111:1703-1713. [PMID: 27760357 DOI: 10.1016/j.bpj.2016.09.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 07/28/2016] [Accepted: 09/06/2016] [Indexed: 12/25/2022] Open
Abstract
To allow breathing and prevent alveolar collapse, lung surfactant (LS) develops a complex membranous system at the respiratory surface. LS is defined by a specific protein and lipid composition, including saturated and unsaturated phospholipid species and cholesterol. Surfactant protein C (SP-C) has been suggested to be an essential element for sustaining the presence of cholesterol in surfactant without functional impairment. In this work, we used a fluorescent sterol-partitioning assay to assess the effect of the surfactant proteins SP-B and SP-C on cholesterol distribution in membranes. Our results suggest that in the LS context, the combined action of SP-B and SP-C appears to facilitate cholesterol dynamics, whereas SP-C does not seem to establish a direct interaction with cholesterol that could increase the partition of free cholesterol into membranes. Interestingly, SP-C exhibits a membrane-fragmentation behavior, leading to the conversion of large unilamellar vesicles into highly curved vesicles ∼25 nm in diameter. Sterol partition was observed to be sensitive to the bending of bilayers, indicating that the effect of SP-C to mobilize cholesterol could be indirectly associated with SP-C-mediated membrane remodeling. Our results suggest a potential role for SP-C in generating small surfactant structures that may participate in cholesterol mobilization and pulmonary surfactant homeostasis at the alveolar interfaces.
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Affiliation(s)
- Nuria Roldan
- Department of Biochemistry and Molecular Biology I, Complutense University, Madrid, Spain
| | - Thomas K M Nyholm
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - J Peter Slotte
- Biochemistry, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology I, Complutense University, Madrid, Spain
| | - Begoña García-Álvarez
- Department of Biochemistry and Molecular Biology I, Complutense University, Madrid, Spain.
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36
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Hidalgo A, Cruz A, Pérez-Gil J. Pulmonary surfactant and nanocarriers: Toxicity versus combined nanomedical applications. Biochim Biophys Acta Biomembr 2017; 1859:1740-1748. [PMID: 28450046 DOI: 10.1016/j.bbamem.2017.04.019] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 04/19/2017] [Accepted: 04/20/2017] [Indexed: 01/05/2023]
Abstract
Pulmonary surfactant is a membrane-based lipid-protein system essential for the process of breathing, which coats and stabilizes the whole respiratory surface and possesses exceptional biophysical properties. It constitutes the first barrier against the entry of pathogens and harmful particles in the alveolar region, extended through the lungs, but on the other hand, it can offer novel possibilities as a shuttle for the delivery of drugs and nanocarriers. The advances in nanotechnology are opening the doors to new diagnostic and therapeutic avenues, which are not accessible by means of the current approaches. In this context, the pulmonary route is called to become a powerful way of entry for innovative treatments based on nanotechnology. In this review, the anatomy of the respiratory system and its properties for drug entry are first revisited, as well as some current strategies that use the respiratory route for both local and peripheral action. Then, a brief overview is presented on what pulmonary surfactant is, how it works and why it could be used as a drug delivery vehicle. Finally, the review is closed with a description of the development of nanocarriers in the lung context and their interaction with endogenous and clinical pulmonary surfactants. This article is part of a Special Issue entitled: Membrane Lipid Therapy: Drugs Targeting Biomembranes edited by Pablo V. Escribá.
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Affiliation(s)
- Alberto Hidalgo
- Department of Biochemistry, Fac. of Biology, and Research Institut "Hospital 12 de Octubre", Complutense University, Madrid, Spain
| | - Antonio Cruz
- Department of Biochemistry, Fac. of Biology, and Research Institut "Hospital 12 de Octubre", Complutense University, Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry, Fac. of Biology, and Research Institut "Hospital 12 de Octubre", Complutense University, Madrid, Spain.
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37
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Roldan N, Cruz A, Sanz A, Bruix M, Pérez-Gil J, Garcia-Alvarez B. Delivery of Lung Surfactant SP-C Based Nanostructures to Respiratory Air-Liquid Interfacial Films. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.2116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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López-Rodríguez JC, Barderas R, Echaide M, Pérez-Gil J, Villalba M, Batanero E, Cruz A. Surface Activity as a Crucial Factor of the Biological Actions of Ole e 1, the Main Aeroallergen of Olive Tree (Olea europaea) Pollen. Langmuir 2016; 32:11055-11062. [PMID: 27723354 DOI: 10.1021/acs.langmuir.6b02831] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Aeroallergens are airborne substances-mainly proteins-capable of triggering Th2-immune responses in respiratory allergies. They enter into the body through the upper airways, reaching the mucosa afterward. Mucosae lining at the luminal side consists of an epithelial barrier completely covered by mucus and pulmonary surfactant. Both pulmonary surfactant and plasma membrane of the epithelial cells represent two physiological phospholipid-based barriers where allergens first impact before triggering their biological effects. The interaction of allergens with lipids at relevant physiological surfaces could promote structural changes on the molecule, resulting on a potential modification of its allergenic properties. In this work, we have first described the surface and phospholipid interaction capabilities of the clinically relevant aeroallergen Ole e 1, the main allergen of olive tree pollen. By using epifluorescence microscopy of Langmuir transferred films, we observed that lipid-packed ordered domains may function as a preferential location for allergen to accumulate at the air-liquid interface, an effect that is abolished in the presence of cholestenone. The possible implications of phospholipid-interfacial effects in the modification of allergen structural and functional properties will be discussed.
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Affiliation(s)
| | | | - Mercedes Echaide
- Instituto de Investigación "Hospital 12 de Octubre" , 28041 Madrid, Spain
| | - Jesús Pérez-Gil
- Instituto de Investigación "Hospital 12 de Octubre" , 28041 Madrid, Spain
| | | | | | - Antonio Cruz
- Instituto de Investigación "Hospital 12 de Octubre" , 28041 Madrid, Spain
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Huarte N, Carravilla P, Cruz A, Lorizate M, Nieto-Garai JA, Kräusslich HG, Pérez-Gil J, Requejo-Isidro J, Nieva JL. Functional organization of the HIV lipid envelope. Sci Rep 2016; 6:34190. [PMID: 27678107 PMCID: PMC5039752 DOI: 10.1038/srep34190] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 09/08/2016] [Indexed: 12/17/2022] Open
Abstract
The chemical composition of the human immunodeficiency virus type 1 (HIV-1) membrane is critical for fusion and entry into target cells, suggesting that preservation of a functional lipid bilayer organization may be required for efficient infection. HIV-1 acquires its envelope from the host cell plasma membrane at sites enriched in raft-type lipids. Furthermore, infectious particles display aminophospholipids on their surface, indicative of dissipation of the inter-leaflet lipid asymmetry metabolically generated at cellular membranes. By combining two-photon excited Laurdan fluorescence imaging and atomic force microscopy, we have obtained unprecedented insights into the phase state of membranes reconstituted from viral lipids (i.e., extracted from infectious HIV-1 particles), established the role played by the different specimens in the mixtures, and characterized the effects of membrane-active virucidal agents on membrane organization. In determining the molecular basis underlying lipid packing and lateral heterogeneity of the HIV-1 membrane, our results may help develop compounds with antiviral activity acting by perturbing the functional organization of the lipid envelope.
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Affiliation(s)
- Nerea Huarte
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Pablo Carravilla
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Antonio Cruz
- Department of Biochemistry, Faculty of Biology, and Research Institute Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain
| | - Maier Lorizate
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.,Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Jon A Nieto-Garai
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - Hans-Georg Kräusslich
- Department of Infectious Diseases, Virology, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology, and Research Institute Hospital 12 de Octubre, Universidad Complutense, Madrid, Spain
| | - Jose Requejo-Isidro
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
| | - José L Nieva
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
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Cerrada A, Haller T, Cruz A, Pérez-Gil J. Pneumocytes Assemble Lung Surfactant as Highly Packed/Dehydrated States with Optimal Surface Activity. Biophys J 2016; 109:2295-306. [PMID: 26636941 DOI: 10.1016/j.bpj.2015.10.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 10/08/2015] [Accepted: 10/13/2015] [Indexed: 01/22/2023] Open
Abstract
Pulmonary surfactant (PS) is an essential complex of lipids and specific proteins synthesized in alveolar type II pneumocytes, where it is assembled and stored intracellularly as multilayered organelles known as lamellar bodies (LBs). Once secreted upon physiological stimulation, LBs maintain a densely packed structure in the form of lamellar body-like particles (LBPs), which are efficiently transferred into the alveolar air-water interface, lowering surface tension to avoid lung collapse at end-expiration. In this work, the structural organization of membranes in LBs and LBPs freshly secreted by primary cultures of rat ATII cells has been compared with that of native lung surfactant membranes isolated from porcine bronchoalveolar lavage. PS assembles in LBs as crystalline-like highly ordered structures, with a highly packed and dehydrated state, which is maintained at supraphysiological temperatures. This relatively ordered/packed state is retained in secreted LBPs. The micro- and nanostructural examination of LBPs suggests the existence of high levels of structural complexity in comparison with the material purified from lavages, which may contain partially inactivated or spent structures. Additionally, freshly secreted surfactant LBPs exhibit superior activity when generating interfacial films and a higher intrinsic resistance to inactivating agents, such as serum proteins or meconium. We propose that LBs are assembled as an energy-activated structure competent to form very efficient interfacial films, and that the organization of lipids and proteins and the properties displayed by the films formed by LBPs are likely similar to those established at the alveolar interface and represent the actual functional structure of surfactant as it sustains respiration.
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Affiliation(s)
- Alejandro Cerrada
- Department of Biochemistry, Faculty of Biology, and Hospital 12 Octubre Research Institute, Universidad Complutense, Madrid, Spain
| | - Thomas Haller
- Department of Physiology and Medical Physics, Medical University of Innsbruck, Innsbruck, Austria
| | - Antonio Cruz
- Department of Biochemistry, Faculty of Biology, and Hospital 12 Octubre Research Institute, Universidad Complutense, Madrid, Spain
| | - Jesús Pérez-Gil
- Department of Biochemistry, Faculty of Biology, and Hospital 12 Octubre Research Institute, Universidad Complutense, Madrid, Spain.
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Bañares-Hidalgo Á, Pérez-Gil J, Estrada P. Conformational Stability of the NH2-Terminal Propeptide of the Precursor of Pulmonary Surfactant Protein SP-B. PLoS One 2016; 11:e0158430. [PMID: 27380171 PMCID: PMC4933373 DOI: 10.1371/journal.pone.0158430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Accepted: 06/15/2016] [Indexed: 11/18/2022] Open
Abstract
Assembly of pulmonary surfactant lipid-protein complexes depends on conformational changes coupled with proteolytic maturation of proSP-B, the precursor of pulmonary surfactant protein B (SP-B), along the surfactant biogenesis pathway in pneumocytes. Conformational destabilization of the N-terminal propeptide of proSP-B (SP-BN) triggers exposure of the mature SP-B domain for insertion into surfactant lipids. We have studied the conformational stability during GdmCl- or urea-promoted unfolding of SP-BN with trp fluorescence and circular dichroism spectroscopies. Binding of the intermediate states to bis-ANS suggests their molten globule-like character. ΔG0H2O was ~ 12.7 kJ·mol-1 either with urea or GdmCl. None of the thermal transitions of SP-BN detected by CD correspond to protein unfolding. Differential scanning calorimetry of SP-BN evidenced two endothermic peaks involved in oligomer dissociation as confirmed with 2 M urea. Ionic strength was relevant since at 150 mM NaCl, the process originating the endotherm at the highest temperature was irreversible (Tm2 = 108.5°C) with an activation energy of 703.8 kJ·mol-1. At 500 mM NaCl the process became reversible (Tm2 = 114.4°C) and data were fitted to the Non-two States model with two subpeaks. No free thiols in the propeptide could be titrated by DTNB with or without 5.7 M GdmCl, indicating disulfide bonds establishment.
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Affiliation(s)
- Ángeles Bañares-Hidalgo
- Departamento de Bioquímica y Biología Molecular I, Facultad de Biología, Universidad Complutense, Ciudad Universitaria, 28040, Madrid, Spain
| | - Jesús Pérez-Gil
- Departamento de Bioquímica y Biología Molecular I, Facultad de Biología, Universidad Complutense, Ciudad Universitaria, 28040, Madrid, Spain
- * E-mail:
| | - Pilar Estrada
- Departamento de Bioquímica y Biología Molecular I, Facultad de Biología, Universidad Complutense, Ciudad Universitaria, 28040, Madrid, Spain
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De Backer L, Cerrada A, Pérez-Gil J, De Smedt SC, Raemdonck K. Bio-inspired materials in drug delivery: Exploring the role of pulmonary surfactant in siRNA inhalation therapy. J Control Release 2015; 220:642-50. [PMID: 26363301 DOI: 10.1016/j.jconrel.2015.09.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [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: 07/15/2015] [Revised: 08/31/2015] [Accepted: 09/04/2015] [Indexed: 01/13/2023]
Abstract
Many pathologies of the respiratory tract are inadequately treated with existing small molecule-based therapies. The emergence of RNA interference (RNAi) enables the post-transcriptional silencing of key molecular disease factors that cannot readily be targeted with conventional small molecule drugs. Pulmonary administration of RNAi effectors, such as small interfering RNA (siRNA), allows direct delivery into the lung tissue, hence reducing systemic exposure. Unfortunately, the clinical translation of RNAi is severely hampered by inefficient delivery of siRNA therapeutics towards the cytoplasm of the target cells. In order to have a better control of the siRNA delivery process, both extra- and intracellular, siRNAs are typically formulated in nanosized delivery vehicles (nanoparticles, NPs). In the lower airways, which are the targeted sites of action for multiple pulmonary disorders, these siRNA-loaded NPs will encounter the pulmonary surfactant (PS) layer, covering the entire alveolar surface. The interaction between the instilled siRNA-loaded NPs and the PS at this nano-bio interface results in the adsorption of PS components onto the surface of the NPs. The formation of this so-called biomolecular corona conceals the original NP surface and will therefore profoundly determine the biological efficacy of the NP. Though this interplay has initially been regarded as a barrier towards efficient siRNA delivery to the respiratory target cell, recent reports have illustrated that the interaction with PS might also be beneficial for local pulmonary siRNA delivery.
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Affiliation(s)
- Lynn De Backer
- Laboratory for General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Alejandro Cerrada
- Departamento de Bioquimica y Biologia Molecular, Facultad de Biologia, and Research Institute Hospital 12 Octubre, Universidad Complutense, José Antonio Novais 2, 28040 Madrid, Spain.
| | - Jesús Pérez-Gil
- Departamento de Bioquimica y Biologia Molecular, Facultad de Biologia, and Research Institute Hospital 12 Octubre, Universidad Complutense, José Antonio Novais 2, 28040 Madrid, Spain.
| | - Stefaan C De Smedt
- Laboratory for General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Koen Raemdonck
- Laboratory for General Biochemistry and Physical Pharmacy, Faculty of Pharmacy, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
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Hidalgo A, Cruz A, Pérez-Gil J. Barrier or carrier? Pulmonary surfactant and drug delivery. Eur J Pharm Biopharm 2015; 95:117-27. [PMID: 25709061 DOI: 10.1016/j.ejpb.2015.02.014] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [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: 11/23/2014] [Revised: 01/28/2015] [Accepted: 02/06/2015] [Indexed: 11/29/2022]
Abstract
To consider the lung as a target for drug delivery and to optimise strategies directed at the pulmonary route, it is essential to consider the role of pulmonary surfactant, a thin lipid-protein film lining the respiratory surface of mammalian lungs. Membrane-based surfactant multilayers are essential for reducing the surface tension at the respiratory air-liquid interface to minimise the work of breathing. Different components of surfactant are also responsible for facilitating the removal of potentially pathological entities such as microorganisms, allergens or environmental pollutants and particles. Upon inhalation, drugs or nanoparticles first contact the surfactant layer, and these interactions critically affect their lifetime and fate in the airways. This review summarises the current knowledge on the possible role and effects of the pulmonary surfactant system in drug delivery strategies. It also summarises the evidence that suggests that pulmonary surfactant is far from being an insuperable barrier and could be used as an efficient shuttle for delivering hydrophobic and hydrophilic compounds deep into the lung and the organism.
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Affiliation(s)
- Alberto Hidalgo
- Dept. of Biochemistry, Fac. of Biology, and Research Institute Hospital 12 Octubre, Universidad Complutense, Madrid, Spain
| | - Antonio Cruz
- Dept. of Biochemistry, Fac. of Biology, and Research Institute Hospital 12 Octubre, Universidad Complutense, Madrid, Spain
| | - Jesús Pérez-Gil
- Dept. of Biochemistry, Fac. of Biology, and Research Institute Hospital 12 Octubre, Universidad Complutense, Madrid, Spain.
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Pérez-Gil J, Monroy FP. Surfing the continuous and walking amongst molecules to unravel the mechanical properties of biomembranes. Chem Phys Lipids 2015; 185:1-2. [PMID: 25618480 DOI: 10.1016/j.chemphyslip.2014.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Roldan N, Goormaghtigh E, Pérez-Gil J, Garcia-Alvarez B. Palmitoylation as a key factor to modulate SP-C–lipid interactions in lung surfactant membrane multilayers. Biochimica et Biophysica Acta (BBA) - Biomembranes 2015; 1848:184-91. [DOI: 10.1016/j.bbamem.2014.10.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 09/16/2014] [Accepted: 10/01/2014] [Indexed: 11/24/2022]
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Olmeda B, Umstead TM, Silveyra P, Pascual A, López-Barneo J, Phelps DS, Floros J, Pérez-Gil J. Effect of hypoxia on lung gene expression and proteomic profile: insights into the pulmonary surfactant response. J Proteomics 2014; 101:179-91. [PMID: 24576641 DOI: 10.1016/j.jprot.2014.02.019] [Citation(s) in RCA: 12] [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: 11/15/2013] [Revised: 01/22/2014] [Accepted: 02/18/2014] [Indexed: 12/14/2022]
Abstract
UNLABELLED Exposure of lung to hypoxia has been previously reported to be associated with significant alterations in the protein content of bronchoalveolar lavage (BAL) and lung tissue. In the present work we have used a proteomic approach to describe the changes in protein complement induced by moderate long-term hypoxia (rats exposed to 10% O2 for 72h) in BAL and lung tissue, with a special focus on the proteins associated with pulmonary surfactant, which could indicate adaptation of this system to limited oxygen availability. The analysis of the general proteomic profile indicates a hypoxia-induced increase in proteins associated with inflammation both in lavage and lung tissue. Analysis at mRNA and protein levels revealed no significant changes induced by hypoxia on the content in surfactant proteins or their apparent oligomeric state. In contrast, we detected a hypoxia-induced significant increase in the expression and accumulation of hemoglobin in lung tissue, at both mRNA and protein levels, as well as an accumulation of hemoglobin both in BAL and associated with surface-active membranes of the pulmonary surfactant complex. Evaluation of pulmonary surfactant surface activity from hypoxic rats showed no alterations in its spreading ability, ruling out inhibition by increased levels of serum or inflammatory proteins. BIOLOGICAL SIGNIFICANCE This work reveals that hypoxia induces extensive changes in the proteomic profile of lung bronchoalveolar lavage, including the presence of proteins related with inflammation both in lung tissue and lavage, and a significant increase in the synthesis and secretion by the lung tissue of different forms of hemoglobin. The level of specific pulmonary surfactant-associated proteins is not substantially altered due to hypoxia, but hypoxia-adapted surfactant exhibits an enhanced ability to form surface-active films at the air-liquid interface. The increased amount of β-globin integrated into the operative surfactant complexes obtained from hypoxic rats is a relevant feature that points to the existence of adaptive responses coupling surfactant function and oxygen availability.
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Affiliation(s)
- Bárbara Olmeda
- Dept. Bioquímica, Fac. Biología, Universidad Complutense, Madrid, Spain
| | - Todd M Umstead
- Center for Host Defense, Inflammation, and Lung Disease (CHILD), Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Patricia Silveyra
- Center for Host Defense, Inflammation, and Lung Disease (CHILD), Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Alberto Pascual
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Sevilla, Spain
| | - José López-Barneo
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Sevilla, Spain
| | - David S Phelps
- Center for Host Defense, Inflammation, and Lung Disease (CHILD), Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Joanna Floros
- Center for Host Defense, Inflammation, and Lung Disease (CHILD), Department of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Jesús Pérez-Gil
- Dept. Bioquímica, Fac. Biología, Universidad Complutense, Madrid, Spain.
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Lopez-Rodriguez E, Pérez-Gil J. Structure-function relationships in pulmonary surfactant membranes: from biophysics to therapy. Biochim Biophys Acta 2014; 1838:1568-85. [PMID: 24525076 DOI: 10.1016/j.bbamem.2014.01.028] [Citation(s) in RCA: 173] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Revised: 01/22/2014] [Accepted: 01/27/2014] [Indexed: 01/01/2023]
Abstract
Pulmonary surfactant is an essential lipid-protein complex to maintain an operative respiratory surface at the mammalian lungs. It reduces surface tension at the alveolar air-liquid interface to stabilise the lungs against physical forces operating along the compression-expansion breathing cycles. At the same time, surfactant integrates elements establishing a primary barrier against the entry of pathogens. Lack or deficiencies of the surfactant system are associated with respiratory pathologies, which treatment often includes supplementation with exogenous materials. The present review summarises current models on the molecular mechanisms of surfactant function, with particular emphasis in its biophysical properties to stabilise the lungs and the molecular alterations connecting impaired surfactant with diseased organs. It also provides a perspective on the current surfactant-based strategies to treat respiratory pathologies. This article is part of a Special Issue entitled: Membrane Structure and Function: Relevance in the Cell's Physiology, Pathology and Therapy.
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Affiliation(s)
- Elena Lopez-Rodriguez
- Departamento de Bioquimica y Biologia Molecular, Facultad de Biologia, Universidad Complutense de Madrid, Madrid, Spain; Institute for Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany; Biomedical Research in End Stage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research, Hannover, Germany
| | - Jesús Pérez-Gil
- Departamento de Bioquimica y Biologia Molecular, Facultad de Biologia, Universidad Complutense de Madrid, Madrid, Spain
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Cerrada A, de la Torre P, Grande J, Haller T, Flores AI, Pérez-Gil J. Human decidua-derived mesenchymal stem cells differentiate into functional alveolar type II-like cells that synthesize and secrete pulmonary surfactant complexes. PLoS One 2014; 9:e110195. [PMID: 25333871 PMCID: PMC4198213 DOI: 10.1371/journal.pone.0110195] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 09/18/2014] [Indexed: 02/05/2023] Open
Abstract
Lung alveolar type II (ATII) cells are specialized in the synthesis and secretion of pulmonary surfactant, a lipid-protein complex that reduces surface tension to minimize the work of breathing. Surfactant synthesis, assembly and secretion are closely regulated and its impairment is associated with severe respiratory disorders. At present, well-established ATII cell culture models are not available. In this work, Decidua-derived Mesenchymal Stem Cells (DMSCs) have been differentiated into Alveolar Type II- Like Cells (ATII-LCs), which display membranous cytoplasmic organelles resembling lamellar bodies, the organelles involved in surfactant storage and secretion by native ATII cells, and accumulate disaturated phospholipid species, a surfactant hallmark. Expression of characteristic ATII cells markers was demonstrated in ATII-LCs at gene and protein level. Mimicking the response of ATII cells to secretagogues, ATII-LCs were able to exocytose lipid-rich assemblies, which displayed highly surface active capabilities, including faster interfacial adsorption kinetics than standard native surfactant, even in the presence of inhibitory agents. ATII-LCs could constitute a highly useful ex vivo model for the study of surfactant biogenesis and the mechanisms involved in protein processing and lipid trafficking, as well as the packing and storage of surfactant complexes.
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Affiliation(s)
- Alejandro Cerrada
- Departmento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
| | - Paz de la Torre
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Jesús Grande
- Departmento de Obstetricia y Ginecología, Hospital 12 de Octubre, Madrid, Spain
| | - Thomas Haller
- Department of Physiology, Innsbruck Medical University, Innsbruck, Austria
| | - Ana I. Flores
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
- * E-mail: (AIF); (JPG)
| | - Jesús Pérez-Gil
- Departmento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad Complutense, Madrid, Spain
- * E-mail: (AIF); (JPG)
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Bernardino de la Serna J, Vargas R, Picardi V, Cruz A, Arranz R, Valpuesta JM, Mateu L, Pérez-Gil J. Segregated ordered lipid phases and protein-promoted membrane cohesivity are required for pulmonary surfactant films to stabilize and protect the respiratory surface. Faraday Discuss 2013; 161:535-48; discussion 563-89. [PMID: 23805757 DOI: 10.1039/c2fd20096a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pulmonary surfactant is a lipid-protein complex essential to stabilize alveoli, by forming surface active films able to reach and sustain very low surface tensions (< 2 mN m(-1)) during the film compression that occurs at end-expiration. The particular lipid composition of surfactant, including a high proportion of dipalmitoylphosphatidylcholine (DPPC), induces segregation of fluid ordered and disordered phases in surfactant membranes and films at physiological temperatures. The segregation of DPPC-enriched ordered phase has been related with the ability of surfactant films to produce very low tensions, while the presence in surfactant of two specific hydrophobic polypeptides, SP-B and SP-C, is absolutely required to facilitate surfactant dynamics, including film formation and re-spreading during expansion at inspiration. In the present study, we have used X-ray scattering to analyze the structure of (1) whole native surfactant membranes purified from porcine lungs, (2) membranes reconstituted from the organic extract of surfactant containing the full lipid complement and the physiological proportion of SP-B and SP-C, and (3) membranes reconstituted from the lipid fraction of surfactant depleted of proteins. Small angle X-ray scattering data from whole surfactant or from membranes reconstituted from surfactant organic extract indicated the co-existence of two lamellar phases with different thicknesses. Such phase coexistence disappeared upon heating of the samples at temperatures above physiological values. When assessed in a captive bubble surfactometer, which mimics interfacial compression-expansion dynamics, the ability of surfactant films to produce very low tensions is only maintained at temperatures permitting the coexistence of the two lamellar phases. On the other hand, membranes reconstituted in the absence of proteins produced diffractograms indicative of the existence of a single dominant lamellar phase at all temperatures. These data suggest that SP-B and SP-C establish membrane-membrane interactions coupling the stacks of different segregated phases. The low compressibility of surfactant films that leads to the maximal pressures (minimal tensions) is supported on one hand by the highly packed solid-like character of segregated DPPC-enriched domains and, on the other hand, by a high cohesivity of multilayered structures promoted by hydrophoblic surfactant proteins, in particular SP-B, at the more dynamic disordered membrane regions, in which SP-B selectively partitions. Cryo-electron microscopy has shown that SP-B induces formation of tight membrane-membrane contacts, a finding that supports our inference concerning the role of these surfactant proteins.
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50
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Lopez-Rodriguez E, Cruz A, Richter RP, Taeusch HW, Pérez-Gil J. Transient exposure of pulmonary surfactant to hyaluronan promotes structural and compositional transformations into a highly active state. J Biol Chem 2013; 288:29872-81. [PMID: 23983120 DOI: 10.1074/jbc.m113.493957] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pulmonary surfactant is a lipid-protein complex that lowers surface tension at the respiratory air-liquid interface, stabilizing the lungs against physical forces tending to collapse alveoli. Dysfunction of surfactant is associated with respiratory pathologies such as acute respiratory distress syndrome or meconium aspiration syndrome where naturally occurring surfactant-inhibitory agents such as serum, meconium, or cholesterol reach the lung. We analyzed the effect of hyaluronan (HA) on the structure and surface behavior of pulmonary surfactant to understand the mechanism for HA-promoted surfactant protection in the presence of inhibitory agents. In particular, we found that HA affects structural properties such as the aggregation state of surfactant membranes and the size, distribution, and order/packing of phase-segregated lipid domains. These effects do not require a direct interaction between surfactant complexes and HA and are accompanied by a compositional reorganization of large surfactant complexes that become enriched with saturated phospholipid species. HA-exposed surfactant reaches very high efficiency in terms of rapid and spontaneous adsorption of surfactant phospholipids at the air-liquid interface and shows significantly improved resistance to inactivation by serum or cholesterol. We propose that physical effects pertaining to the formation of a meshwork of interpenetrating HA polymer chains are responsible for the changes in surfactant structure and composition that enhance surfactant function and, thus, resistance to inactivation. The higher resistance of HA-exposed surfactant to inactivation persists even after removal of the polymer, suggesting that transient exposure of surfactant to polymers like HA could be a promising strategy for the production of more efficient therapeutic surfactant preparations.
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Affiliation(s)
- Elena Lopez-Rodriguez
- From the Departamento de Bioquimica y Biologia Molecular, Facultad de Biologia, Universidad Complutense, 28040 Madrid, Spain
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