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Chen P, Zhang Z, Gu N, Ji M. Effect of the surface charge density of nanoparticles on their translocation across pulmonary surfactant monolayer: a molecular dynamics simulation. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1342118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Peng Chen
- Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science & Medical Engineering, Southeast University, Nanjing, People’s Republic of China
| | - Zuoheng Zhang
- Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science & Medical Engineering, Southeast University, Nanjing, People’s Republic of China
| | - Ning Gu
- Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science & Medical Engineering, Southeast University, Nanjing, People’s Republic of China
| | - Min Ji
- Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science & Medical Engineering, Southeast University, Nanjing, People’s Republic of China
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52
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Hidalgo A, Cruz A, Pérez-Gil J. Pulmonary surfactant and nanocarriers: Toxicity versus combined nanomedical applications. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 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] [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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53
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Fumagalli S, De Simoni MG. Lectin Complement Pathway and Its Bloody Interactions in Brain Ischemia. Stroke 2016; 47:3067-3073. [PMID: 27811336 DOI: 10.1161/strokeaha.116.012407] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Stefano Fumagalli
- From the Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Maria-Grazia De Simoni
- From the Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy.
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54
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Beck-Broichsitter M. Biophysical Activity of Impaired Lung Surfactant upon Exposure to Polymer Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:10422-10429. [PMID: 27641633 DOI: 10.1021/acs.langmuir.6b02893] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Colloidal drug carriers could improve the therapy of numerous airway diseases. However, it remains unclear to what extent nanoscale particulate matter affects the biophysical function of the essential surface-active lining layer of the lungs, especially under predisposed conditions of airway diseases. Accordingly, the current study investigated the impact of defined polymer nanoparticles on impaired lung surfactants. Admixtures of plasma proteins (albumin and fibrinogen) to Curosurf led to a controllable decrease in surface activity (i.e., adsorption and minimal surface tension of >25 and >5 mN/m, respectively), which served as models for dysfunctional lung surfactants. Next, Curosurf preincubated with plasma proteins was challenged with negatively- and positively charged poly(lactide) nanoparticles. Negatively charged nanoparticles significantly perturbed the biophysical function of impaired Curosurf in a dose-dependent manner, most-likely due to a binding of essential surfactant components. By contrast, addition of positively charged nanoparticles led to no further loss of surface activity, but a remarkable depletion of plasma protein content. Once adsorbed to the surface of polymer nanoparticles, plasma proteins were hindered to displace relevant surfactant components from the air/liquid interface. Overall, the current study indicated that, depending on their physicochemical properties, colloidal drug carriers could compromise the biophysical function of impaired lung surfactants. Notably, a positive surface charge represents a parameter for the rationale design of polymer nanomedicines causing negligible adverse events on an impaired surface-active lining layer in the lungs.
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Affiliation(s)
- Moritz Beck-Broichsitter
- Medical Clinic II, Department of Internal Medicine, Justus-Liebig-Universität , 35392 Giessen, Germany
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55
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Whitwell H, Mackay RM, Elgy C, Morgan C, Griffiths M, Clark H, Skipp P, Madsen J. Nanoparticles in the lung and their protein corona: the few proteins that count. Nanotoxicology 2016; 10:1385-94. [PMID: 27465202 DOI: 10.1080/17435390.2016.1218080] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The formation of protein coronae on nanoparticles (NPs) has been investigated almost exclusively in serum, despite the prevailing route of exposure being inhalation of airborne particles. In addition, an increasing number of nanomedicines, that exploit the airways as the site of delivery, are undergoing medical trials. An understanding of the effects of NPs on the airways is therefore required. To further this field, we have described the corona formed on polystyrene (PS) particles with different surface modifications and on titanium dioxide particles when incubated in human bronchoalveolar lavage fluid (BALF) from patients with pulmonary alveolar proteinosis (PAP). We show, using high-resolution quantitative mass spectrometry (MS(E)), that a large number of proteins bind with low copy numbers but that a few "core" proteins bind to all particles tested with high fidelity, averaging the surface properties of the different particles independent of the surface properties of the specific particle. The averaging effect at the particle surface means that differing cellular effects may not be due to the protein corona but due to the surface properties of the nanoparticle once inside the cell. Finally, the adherence of surfactant associated proteins (SP-A, B and D) suggests that there may be interactions with lipids and pulmonary surfactant (PSf), which could have potential in vivo health effects for people with chronic airway diseases such as asthma and chronic obstructive pulmonary disease (COPD), or those who have increased susceptibility toward other respiratory diseases.
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Affiliation(s)
- Harry Whitwell
- a Child Health, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital , Southampton , UK .,b Institute for Life Sciences, University of Southampton , Southampton , UK
| | - Rose-Marie Mackay
- a Child Health, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital , Southampton , UK
| | - Christine Elgy
- c School of Geography, Earth and Environmental Sciences, University of Birmingham , Birmingham , UK
| | - Cliff Morgan
- d Leukocyte Biology, Royal Brompton Campus, Imperial College London , London , UK , and
| | - Mark Griffiths
- d Leukocyte Biology, Royal Brompton Campus, Imperial College London , London , UK , and
| | - Howard Clark
- a Child Health, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital , Southampton , UK .,b Institute for Life Sciences, University of Southampton , Southampton , UK .,e National Institute for Health Research, Southampton Respiratory Biomedical Research Unit, Southampton Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust , Southampton , UK
| | - Paul Skipp
- b Institute for Life Sciences, University of Southampton , Southampton , UK .,e National Institute for Health Research, Southampton Respiratory Biomedical Research Unit, Southampton Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust , Southampton , UK
| | - Jens Madsen
- a Child Health, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton General Hospital , Southampton , UK .,b Institute for Life Sciences, University of Southampton , Southampton , UK .,e National Institute for Health Research, Southampton Respiratory Biomedical Research Unit, Southampton Centre for Biomedical Research, University Hospital Southampton NHS Foundation Trust , Southampton , UK
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56
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Uskoković V, Wu VM. Calcium Phosphate as a Key Material for Socially Responsible Tissue Engineering. MATERIALS 2016; 9. [PMID: 27347359 PMCID: PMC4917371 DOI: 10.3390/ma9060434] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Socially responsible technologies are designed while taking into consideration the socioeconomic, geopolitical and environmental limitations of regions in which they will be implemented. In the medical context, this involves making therapeutic platforms more accessible and affordable to patients in poor regions of the world wherein a given disease is endemic. This often necessitates going against the reigning trend of making therapeutic nanoparticles ever more structurally complex and expensive. However, studies aimed at simplifying materials and formulations while maintaining the functionality and therapeutic response of their more complex counterparts seldom provoke a significant interest in the scientific community. In this review we demonstrate that such compositional simplifications are meaningful when it comes to the design of a solution for osteomyelitis, a disease that is in its natural, non-postoperative form particularly prevalent in the underdeveloped parts of the world wherein poverty, poor sanitary conditions, and chronically compromised defense lines of the immune system are the norm. We show that calcium phosphate nanoparticles, which are inexpensive to make, could be chemically designed to possess the same functionality as a hypothetic mixture additionally composed of: (a) a bone growth factor; (b) an antibiotic for prophylactic or anti-infective purposes; (c) a bisphosphonate as an antiresorptive compound; (d) a viral vector to enable the intracellular delivery of therapeutics; (e) a luminescent dye; (f) a radiographic component; (g) an imaging contrast agent; (h) a magnetic domain; and (i) polymers as viscous components enabling the injectability of the material and acting as carriers for the sustained release of a drug. In particular, calcium phosphates could: (a) produce tunable drug release profiles; (b) take the form of viscous and injectable, self-setting pastes; (c) be naturally osteo-inductive and inhibitory for osteoclastogenesis; (d) intracellularly deliver bioactive compounds; (e) accommodate an array of functional ions; (f) be processed into macroporous constructs for tissue engineering; and (g) be naturally antimicrobial. All in all, we see in calcium phosphates the presence of a protean nature whose therapeutic potentials have been barely tapped into.
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Affiliation(s)
- Vuk Uskoković
- Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA;
- Department of Biomedical and Pharmaceutical Sciences, Chapman University, Irvine, CA 92618-1908, USA
- Correspondence: or ; Tel.: +1-415-412-0233
| | - Victoria M. Wu
- Department of Bioengineering, University of Illinois, Chicago, IL 60607-7052, USA;
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57
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In vivo and in vitro evaluation of hydroxyapatite nanoparticle morphology on the acute inflammatory response. Biomaterials 2016; 90:1-11. [DOI: 10.1016/j.biomaterials.2016.02.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/08/2016] [Accepted: 02/23/2016] [Indexed: 12/26/2022]
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58
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Tsuda A, Venkata NK. The role of natural processes and surface energy of inhaled engineered nanoparticles on aggregation and corona formation. NANOIMPACT 2016; 2:38-44. [PMID: 29202111 PMCID: PMC5711474 DOI: 10.1016/j.impact.2016.06.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The surface chemistry of engineered nanoparticles (ENPs) becomes more important as their size decreases and enters the nanometer-range. This review explains the fundamental properties of the surface chemistry of nanoparticles, and argues that their agglomeration and the formation of corona around them are natural processes that reduce surface energy. ENP agglomeration and surface corona formation are further discussed in the context of inhaled ENPs, as the lung is a major port of ENP entry to the body. The pulmonary surfactant layer, which the inhaled ENPs first encounter as they land on the lung surface, represents a unique environment with a variety of well-defined biomolecules. Many factors, such as hydrophobicity, surface charge of ENPs, protein/phospholipid concentrations of the alveolar lining fluid, etc. influence the complex processes of ENP agglomeration and corona formation in the alveolar lining fluid, and these events occur even before the ENPs reach the cells. We suggest that molecular dynamic simulations can represent a promising future direction for research of the behavior of inhaled ENPs, complementing the experimental approaches. Moreover, we want to remind biologists working on ENPs of the importance relationship between ENP surface energy and size.
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Affiliation(s)
- Akira Tsuda
- Molecular and Integrative Physiological Sciences, Dept. of Environmental Health, Harvard School of Public Health, Boston MA, USA
| | - Nagarjun Konduru Venkata
- Molecular and Integrative Physiological Sciences, Dept. of Environmental Health, Harvard School of Public Health, Boston MA, USA
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59
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Zhao M, Li H, Liu X, Wei J, Ji J, Yang S, Hu Z, Wei S. Response of Human Osteoblast to n-HA/PEEK--Quantitative Proteomic Study of Bio-effects of Nano-Hydroxyapatite Composite. Sci Rep 2016; 6:22832. [PMID: 26956660 PMCID: PMC4783780 DOI: 10.1038/srep22832] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/22/2016] [Indexed: 01/27/2023] Open
Abstract
Nano-sized hydroxyapatite (n-HA) is considered as a bio-active material, which is often mixed into bone implant material, polyetheretherketone (PEEK). To reveal the global protein expression modulations of osteoblast in response to direct contact with the PEEK composite containing high level (40%) nano-sized hydroxyapatite (n-HA/PEEK) and explain its comprehensive bio-effects, quantitative proteomic analysis was conducted on human osteoblast-like cells MG-63 cultured on n-HA/PEEK in comparison with pure PEEK. Results from quantitative proteomic analysis showed that the most enriched categories in the up-regulated proteins were related to calcium ion processes and associated functions while the most enriched categories in the down-regulated proteins were related to RNA process. This enhanced our understanding to the molecular mechanism of the promotion of the cell adhesion and differentiation with the inhibition of the cell proliferation on n-HA/PEEK composite. It also exhibited that although the calcium ion level of incubate environment hadn't increased, merely the calcium fixed on the surface of material had influence to intracellular calcium related processes, which was also reflect by the higher intracellular Ca(2+) concentration of n-HA/PEEK. This study could lead to more comprehensive cognition to the versatile biocompatibility of composite materials. It further proves that proteomics is useful in new bio-effect discovery.
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Affiliation(s)
- Minzhi Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | - Haiyun Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaochen Liu
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, 100871, Beijing, China
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
| | - Jianguo Ji
- State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Peking University, Beijing 100871, China
| | - Shu Yang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhiyuan Hu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | - Shicheng Wei
- Center for Craniofacial Stem Cell Research and Regeneration, Department of Orthodontics, Laboratory of Interdisciplinary Studies, Peking University School and Hospital of Stomatology, Beijing 100081, China
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, 100871, Beijing, China
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60
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Oosterwijk MTT, Feber ML, Burello E. Proposal for a risk banding framework for inhaled low aspect ratio nanoparticles based on physicochemical properties. Nanotoxicology 2016; 10:780-93. [DOI: 10.3109/17435390.2015.1132344] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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61
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Yue T, Xu Y, Li S, Zhang X, Huang F. Lipid extraction mediates aggregation of carbon nanospheres in pulmonary surfactant monolayers. Phys Chem Chem Phys 2016; 18:18923-33. [DOI: 10.1039/c6cp01957a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our MD simulations demonstrate that the aggregation of carbon nanospheres in PSM is in fact size-dependent and mediated by lipid extractions.
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Affiliation(s)
- Tongtao Yue
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Yan Xu
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Shixin Li
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Xianren Zhang
- State Key Laboratory of Organic-Inorganic Composites
- Beijing University of Chemical Technology
- China
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
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62
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Hu Q, Jiao B, Shi X, Valle RP, Zuo YY, Hu G. Effects of graphene oxide nanosheets on the ultrastructure and biophysical properties of the pulmonary surfactant film. NANOSCALE 2015; 7:18025-9. [PMID: 26482703 PMCID: PMC4854527 DOI: 10.1039/c5nr05401j] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Graphene oxide (GO) is the most common derivative of graphene and has been used in a large range of biomedical applications. Despite considerable progress in understanding its cytotoxicity, its potential inhalation toxicity is still largely unknown. As the pulmonary surfactant (PS) film is the first line of host defense, interaction with the PS film determines the fate of the inhaled nanomaterials and their potential toxicity. Using a coarse-grained molecular dynamics model, we reported, for the first time, a novel mechanism of toxicity caused by the inhaled GO nanosheets. Upon deposition, the GO nanosheets induce pores in the PS film and thus have adverse effects on the ultrastructure and biophysical properties of the PS film. Notably, the pores induced by GO nanosheets result in increasing the compressibility of the PS film, which is an important indication of surfactant inhibition. In vitro experiments have also been conducted to study the interactions between GO and animal-derived natural PS films, qualitatively confirming the simulation results.
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Affiliation(s)
- Qinglin Hu
- State Key Laboratory of Nonlinear Mechanics, Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Bao Jiao
- State Key Laboratory of Nonlinear Mechanics, Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Xinghua Shi
- State Key Laboratory of Nonlinear Mechanics, Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Russell P Valle
- Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA.
| | - Yi Y Zuo
- Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA.
| | - Guoqing Hu
- State Key Laboratory of Nonlinear Mechanics, Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
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63
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Arick DQ, Choi YH, Kim HC, Won YY. Effects of nanoparticles on the mechanical functioning of the lung. Adv Colloid Interface Sci 2015; 225:218-28. [PMID: 26494653 DOI: 10.1016/j.cis.2015.10.002] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 10/01/2015] [Accepted: 10/01/2015] [Indexed: 12/11/2022]
Abstract
Nanotechnology is a rapidly expanding field that has very promising applications that will improve industry, medicine, and consumer products. However, despite the growing widespread use of engineered nanoparticles in these areas, very little has been done to assess the potential health risks they may pose to high-risk areas of the body, particularly the lungs. In this review we first briefly discuss the structure of the lungs and establish that the pulmonary surfactant (PS), given its vulnerability and huge contribution to healthy lung function, is a mechanism of great concern when evaluating potential nanoparticle interactions within the lung. To warrant that these interactions can occur, studies on the transport of nanoaerols are reviewed to highlight that a plethora of factors contribute to a nanoparticle's ability to travel to the deep regions of the lung where PS resides. The focus of this review is to determine the extent that physicochemical characteristics of nanoparticles such as size, hydrophobicity, and surface charge effect PS function. Numerous nanoparticle types are taken into consideration in order to effectively evaluate observed consistencies across numerous nanoparticle types and develop general trends that exist among the physicochemical characteristics of interest. Biological responses from other mechanisms/components of the lung are briefly discussed to provide further insights on how the toxicology of different nanoparticles is determined. We conclude by discussing general trends that summarize consistencies observed among the studies in regard to physicochemical properties and their effects on monolayer function, addressing current gaps in our understanding, and discussing the future outlook of this field of research.
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Affiliation(s)
- Davis Q Arick
- School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Yun Hwa Choi
- School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Hyun Chang Kim
- School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - You-Yeon Won
- School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA; Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 136-791, Korea.
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64
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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] [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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65
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Kodama AT, Kuo CC, Boatwright T, Dennin M. Investigating the effect of particle size on pulmonary surfactant phase behavior. Biophys J 2015; 107:1573-81. [PMID: 25296309 DOI: 10.1016/j.bpj.2014.08.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 07/17/2014] [Accepted: 08/06/2014] [Indexed: 12/14/2022] Open
Abstract
We study the impact of the addition of particles of a range of sizes on the phase transition behavior of lung surfactant under compression. Charged particles ranging from micro- to nanoscale are deposited on lung surfactant films in a Langmuir trough. Surface area versus surface pressure isotherms and fluorescent microscope observations are utilized to determine changes in the phase transition behavior. We find that the deposition of particles close to 20 nm in diameter significantly impacts the coexistence of the liquid-condensed phase and liquid-expanded phase. This includes morphological changes of the liquid-condensed domains and the elimination of the squeeze-out phase in isotherms. Finally, a drastic increase of the domain fraction of the liquid-condensed phase can be observed for the deposition of 20-nm particles. As the particle size is increased, we observe a return to normal phase behavior. The net result is the observation of a critical particle size that may impact the functionality of the lung surfactant during respiration.
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Affiliation(s)
- Akihisa T Kodama
- Department of Physics & Astronomy, University of California, Irvine, California
| | - Chin-Chang Kuo
- Department of Physics & Astronomy, University of California, Irvine, California
| | - Thomas Boatwright
- Department of Physics & Astronomy, University of California, Irvine, California
| | - Michael Dennin
- Department of Physics & Astronomy, University of California, Irvine, California.
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66
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Valle RP, Wu T, Zuo YY. Biophysical influence of airborne carbon nanomaterials on natural pulmonary surfactant. ACS NANO 2015; 9:5413-21. [PMID: 25929264 PMCID: PMC4856476 DOI: 10.1021/acsnano.5b01181] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Inhalation of nanoparticles (NP), including lightweight airborne carbonaceous nanomaterials (CNM), poses a direct and systemic health threat to those who handle them. Inhaled NP penetrate deep pulmonary structures in which they first interact with the pulmonary surfactant (PS) lining at the alveolar air-water interface. In spite of many research efforts, there is a gap of knowledge between in vitro biophysical study and in vivo inhalation toxicology since all existing biophysical models handle NP-PS interactions in the liquid phase. This technical limitation, inherent in current in vitro methodologies, makes it impossible to simulate how airborne NP deposit at the PS film and interact with it. Existing in vitro NP-PS studies using liquid-suspended particles have been shown to artificially inflate the no-observed adverse effect level of NP exposure when compared to in vivo inhalation studies and international occupational exposure limits (OELs). Here, we developed an in vitro methodology called the constrained drop surfactometer (CDS) to quantitatively study PS inhibition by airborne CNM. We show that airborne multiwalled carbon nanotubes and graphene nanoplatelets induce a concentration-dependent PS inhibition under physiologically relevant conditions. The CNM aerosol concentrations controlled in the CDS are comparable to those defined in international OELs. Development of the CDS has the potential to advance our understanding of how submicron airborne nanomaterials affect the PS lining of the lung.
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Affiliation(s)
- Russell P. Valle
- Department of Mechanical Engineering, University of Hawaii at Mnoa, Honolulu, Hawaii 96822, United States
| | - Tony Wu
- Department of Mechanical Engineering, University of Hawaii at Mnoa, Honolulu, Hawaii 96822, United States
| | - Yi Y. Zuo
- Department of Mechanical Engineering, University of Hawaii at Mnoa, Honolulu, Hawaii 96822, United States
- Department of Pediatrics, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96826, United States
- Address correspondence to
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Chakraborty A, Mucci NJ, Tan ML, Steckley A, Zhang T, Forrest ML, Dhar P. Phospholipid composition modulates carbon nanodiamond-induced alterations in phospholipid domain formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5093-104. [PMID: 25876023 PMCID: PMC4702515 DOI: 10.1021/la504923j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The focus of this work is to elucidate how phospholipid composition can modulate lipid nanoparticle interactions in phospholipid monolayer systems. We report on alterations in lipid domain formation induced by anionically engineered carbon nanodiamonds (ECNs) as a function of lipid headgroup charge and alkyl chain saturation. Using surface pressure vs area isotherms, monolayer compressibility, and fluorescence microscopy, we found that anionic ECNs induced domain shape alterations in zwitterionic phosphatidylcholine lipids, irrespective of the lipid alkyl chain saturation, even when the surface pressure vs area isotherms did not show any significant changes. Bean-shaped structures characteristic of dipalmitoylphosphatidylcholine (DPPC) were converted to multilobed, fractal, or spiral domains as a result of exposure to ECNs, indicating that ECNs lower the line tension between domains in the case of zwitterionic lipids. For membrane systems containing anionic phospholipids, ECN-induced changes in domain packing were related to the electrostatic interactions between the anionic ECNs and the anionic lipid headgroups, even when zwitterionic lipids are present in excess. By comparing the measured size distributions with our recently developed theory derived by minimizing the free energy associated with the domain energy and mixing entropy, we found that the change in line tension induced by anionic ECNs is dominated by the charge in the condensed lipid domains. Atomic force microscopy images of the transferred anionic films confirm that the location of the anionic ECNs in the lipid monolayers is also modulated by the charge on the condensed lipid domains. Because biological membranes such as lung surfactants contain both saturated and unsaturated phospholipids with different lipid headgroup charges, our results suggest that when studying potential adverse effects of nanoparticles on biological systems the role of lipid compositions cannot be neglected.
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Affiliation(s)
- Aishik Chakraborty
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Nicolas J. Mucci
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Ming Li Tan
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Ashleigh Steckley
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Ti Zhang
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States
| | - M. Laird Forrest
- Department of Pharmaceutical Chemistry, The University of Kansas, Lawrence, Kansas 66045, United States
| | - Prajnaparamita Dhar
- Department of Chemical and Petroleum Engineering, The University of Kansas, Lawrence, Kansas 66045, United States
- Corresponding Author:
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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: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [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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69
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Farnoud AM, Fiegel J. Calf Lung Surfactant Recovers Surface Functionality After Exposure to Aerosols Containing Polymeric Particles. J Aerosol Med Pulm Drug Deliv 2015; 29:10-23. [PMID: 25671772 DOI: 10.1089/jamp.2014.1165] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Recent studies have shown that colloidal particles can disrupt the interfacial properties of lung surfactant and thus key functional abilities of lung surfactant. However, the mechanisms underlying the interactions between aerosols and surfactant films remain poorly understood, as our ability to expose films to particles via the aerosol route has been limited. The aim of this study was to develop a method to reproducibly apply aerosols with a quantifiable particle dose on lung surfactant films and investigate particle-induced changes to the interfacial properties of the surfactant under conditions that more closely mimic those in vivo. METHODS Films of DPPC and Infasurf® were exposed to aerosols containing polystyrene particles generated using a Dry Powder Insufflator™. The dose of particles deposited on surfactant films was determined via light absorbance. The interfacial properties of the surfactant were studied using a Langmuir-Wilhelmy balance during surfactant compression to film collapse and cycles of surface compression and expansion at a fast cycling rate within a small surface area range. RESULTS Exposure of surfactant films to aerosols led to reproducible dosing of particles on the films. In film collapse experiments, particle deposition led to slight changes in collapse surface pressure and surface area of both surfactants. However, longer interaction times between particles and Infasurf® films resulted in time-dependent inhibition of surfactant function. When limited to lung relevant surface pressures, particles reduced the maximum surface pressure that could be achieved. This inhibitory effect persisted for all compression-expansion cycles in DPPC, but normal surfactant behavior was restored in Infasurf® films after five cycles. CONCLUSIONS The observation that Infasurf® was able to quickly restore its function after exposure to aerosols under conditions that better mimicked those in vivo suggests that particle-induced surfactant inhibition is unlikely to occur in vivo due to an aerosol exposure.
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Affiliation(s)
- Amir M Farnoud
- 1 Department of Chemical and Biochemical Engineering, The University of Iowa , Iowa City, Iowa
| | - Jennifer Fiegel
- 1 Department of Chemical and Biochemical Engineering, The University of Iowa , Iowa City, Iowa.,2 Department of Pharmaceutical Sciences and Experimental Therapeutics, The University of Iowa , Iowa City, Iowa
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70
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Yue T, Wang X, Zhang X, Huang F. Molecular modeling of interaction between lipid monolayer and graphene nanosheets: implications for pulmonary nanotoxicity and pulmonary drug delivery. RSC Adv 2015. [DOI: 10.1039/c5ra04922a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Understanding how nanoparticles interact with the pulmonary surfactant monolayer (PSM) is of great importance for safe applications in biomedicine and for evaluation of both health and environment impacts.
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Affiliation(s)
- Tongtao Yue
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - Xiaojuan Wang
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
| | - Xianren Zhang
- State Key Laboratory of Organic–Inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- People's Republic of China
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- People's Republic of China
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71
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Uskoković V. Nanostructured platforms for the sustained and local delivery of antibiotics in the treatment of osteomyelitis. Crit Rev Ther Drug Carrier Syst 2015; 32:1-59. [PMID: 25746204 PMCID: PMC4406243 DOI: 10.1615/critrevtherdrugcarriersyst.2014010920] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This article provides a critical view of the current state of the development of nanoparticulate and other solid-state carriers for the local delivery of antibiotics in the treatment of osteomyelitis. Mentioned are the downsides of traditional means for treating bone infection, which involve systemic administration of antibiotics and surgical debridement, along with the rather imperfect local delivery options currently available in the clinic. Envisaged are more sophisticated carriers for the local and sustained delivery of antimicrobials, including bioresorbable polymeric, collagenous, liquid crystalline, and bioglass- and nanotube-based carriers, as well as those composed of calcium phosphate, the mineral component of bone and teeth. A special emphasis is placed on composite multifunctional antibiotic carriers of a nanoparticulate nature and on their ability to induce osteogenesis of hard tissues demineralized due to disease. An ideal carrier of this type would prevent the long-term, repetitive, and systemic administration of antibiotics and either minimize or completely eliminate the need for surgical debridement of necrotic tissue. Potential problems faced by even hypothetically "perfect" antibiotic delivery vehicles are mentioned too, including (i) intracellular bacterial colonies involved in recurrent, chronic osteomyelitis; (ii) the need for mechanical and release properties to be adjusted to the area of surgical placement; (iii) different environments in which in vitro and in vivo testings are carried out; (iv) unpredictable synergies between drug delivery system components; and (v) experimental sensitivity issues entailing the increasing subtlety of the design of nanoplatforms for the controlled delivery of therapeutics.
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Affiliation(s)
- Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Richard and Loan Hill Department of Bioengineering, College of Medicine, University of Illinois at Chicago, 851 South Morgan St, #205 Chicago, Illinois, 60607-7052
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72
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Nisoh N, Karttunen M, Monticelli L, Wong-ekkabut J. Lipid monolayer disruption caused by aggregated carbon nanoparticles. RSC Adv 2015. [DOI: 10.1039/c4ra17006g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Carbon nanoparticles (CNP) have significant impact on the Pulmonary Surfactant (PS), the first biological barrier in the respiratory system.
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Affiliation(s)
- Nililla Nisoh
- Department of Physics
- Faculty of Science
- Kasetsart University
- Bangkok
- Thailand
| | - Mikko Karttunen
- Department of Chemistry and Waterloo Institute for Nanotechnology
- University of Waterloo
- Waterloo
- Canada
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73
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Beck-Broichsitter M, Ruppert C, Schmehl T, Günther A, Seeger W. Biophysical inhibition of pulmonary surfactant function by polymeric nanoparticles: role of surfactant protein B and C. Acta Biomater 2014; 10:4678-4684. [PMID: 25087869 DOI: 10.1016/j.actbio.2014.07.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/13/2014] [Accepted: 07/22/2014] [Indexed: 10/25/2022]
Abstract
The current study investigated the mechanisms involved in the process of biophysical inhibition of pulmonary surfactant by polymeric nanoparticles (NP). The minimal surface tension of diverse synthetic surfactants was monitored in the presence of bare and surface-decorated (i.e. poloxamer 407) sub-100 nm poly(lactide) NP. Moreover, the influence of NP on surfactant composition (i.e. surfactant protein (SP) content) was studied. Dose-elevations of SP advanced the biophysical activity of the tested surfactant preparation. Surfactant-associated protein C supplemented phospholipid mixtures (PLM-C) were shown to be more susceptible to biophysical inactivation by bare NP than phospholipid mixture supplemented with surfactant protein B (PLM-B) and PLM-B/C. Surfactant function was hindered owing to a drastic depletion of the SP content upon contact with bare NP. By contrast, surface-modified NP were capable of circumventing unwanted surfactant inhibition. Surfactant constitution influences the extent of biophysical inhibition by polymeric NP. Steric shielding of the NP surface minimizes unwanted NP-surfactant interactions, which represents an option for the development of surfactant-compatible nanomedicines.
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74
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Dwivedi MV, Harishchandra RK, Koshkina O, Maskos M, Galla HJ. Size influences the effect of hydrophobic nanoparticles on lung surfactant model systems. Biophys J 2014; 106:289-98. [PMID: 24411261 DOI: 10.1016/j.bpj.2013.10.036] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 10/07/2013] [Accepted: 10/10/2013] [Indexed: 11/19/2022] Open
Abstract
The alveolar lung surfactant (LS) is a complex lipid protein mixture that forms an interfacial monolayer reducing the surface tension to near zero values and thus preventing the lungs from collapse. Due to the expanding field of nanotechnology and the corresponding unavoidable exposure of human beings from the air, it is crucial to study the potential effects of nanoparticles (NPs) on the structural organization of the lung surfactant system. In the present study, we investigated both, the domain structure in pure DPPC monolayers as well as in lung surfactant model systems. In the pure lipid system we found that two different sized hydrophobic polymeric nanoparticles with diameter of ~12 nm and ~136 nm have contrasting effect on the functional and structural behavior. The small nanoparticles inserted into fluid domains at the LE-LC phase transition are not visibly disturbing the phase transition but disrupting the domain morphology of the LE phase. The large nanoparticles led to an expanded isotherm and to a significant decrease in the line tension and thus to a drastic disruption of the domain structures at a much lower number of nanoparticles with respect to the lipid. The surface activity of the model LS films again showed drastic variations due to presence of different sized NPs illustrated by the film balance isotherms and the atomic force microscopy. AFM revealed laterally profuse multilayer protrusion formation on compression but only in the presence of 136 nm sized nanoparticles. Moreover we investigated the vesicle insertion process into a preformed monolayer. A severe inhibition was observed only in the presence of ~136 nm NPs compared to minor effects in the presence of ~12 nm NPs. Our study clearly shows that the size of the nanoparticles made of the same material determines the interaction with biological membranes.
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Affiliation(s)
- Mridula V Dwivedi
- Institute of Biochemistry, Westfälische Wilhelms Universität Münster, Germany; NRW International Graduate School of Chemistry, University of Muenster, Muenster, Germany
| | | | - Olga Koshkina
- BAM Federal Institute for Materials Research and Testing, Berlin, Germany; Institut für Mikrotechnik Mainz (IMM), Mainz, Germany
| | - Michael Maskos
- Institute of Physical Chemistry, Johannes Gutenberg University, Mainz, Germany; Institut für Mikrotechnik Mainz (IMM), Mainz, Germany
| | - Hans-Joachim Galla
- Institute of Biochemistry, Westfälische Wilhelms Universität Münster, Germany.
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75
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PEGylation of ORMOSIL nanoparticles differently modulates the in vitro toxicity toward human lung cells. Arch Toxicol 2014; 89:607-20. [DOI: 10.1007/s00204-014-1273-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/13/2014] [Indexed: 12/17/2022]
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Sachan AK, Galla HJ. Understanding the mutual impact of interaction between hydrophobic nanoparticles and pulmonary surfactant monolayer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:1069-1075. [PMID: 24339125 DOI: 10.1002/smll.201300315] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 09/07/2013] [Indexed: 06/03/2023]
Abstract
Interaction between hydrophobic nanoparticles (NPs) and a pulmonary surfactant (PS) film leads to a shift in molecular packing of surfactant molecules in the PS film around the interacting NPs. The resultant structural arrangement of surfactants around the NPs may be a potential structural factor responsible for their high retention ability within the film. Moreover, during this interaction, surfactant molecules coat the NPs and change their surface properties.
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Affiliation(s)
- Amit K Sachan
- Institute of Biochemistry, Westfälische Wilhelms Universität, Wilhelm-Klemm-Str.2, Münster, 48149, Germany; Institute of Medical Physics and Biophysics, Westfälische Wilhelms Universität, Robert-Koch-Str. 31, Münster, 48149, Germany
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77
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Lin X, Bai T, Zuo YY, Gu N. Promote potential applications of nanoparticles as respiratory drug carrier: insights from molecular dynamics simulations. NANOSCALE 2014; 6:2759-2767. [PMID: 24464138 DOI: 10.1039/c3nr04163h] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanoparticles (NPs) show great promises in biomedical applications as the respiratory drug carrier system. Once reaching the alveolar region, NPs first interact with the pulmonary surfactant (PS) film, which serves as the first biological barrier and plays an important role in maintaining the normal respiratory mechanics. Therefore, understanding the interactions between NPs and PS can help promote the NP-based respiratory drug carrier systems. Using coarse-grained molecular dynamics simulations, we studied the effect of rigid spherical NPs with different hydrophobicity and sizes on a dipalmitoylphosphatidylcholine (DPPC) monolayer at the air-water interface. Four different NPs were considered, including hydrophilic and hydrophobic NPs, each with two diameters of 3 nm and 5 nm (the sizes are comparable to that of generation 3 and 5 PAMAM dendrimers, which have been widely used for nanoscale drug carrier systems). Our simulations showed that hydrophilic NPs can readily penetrate into the aqueous phase with little or no disturbance on the DPPC monolayer. However, hydrophobic NPs tend to induce large structural disruptions, thus inhibiting the normal phase transition of the DPPC monolayer upon film compression. Our simulations also showed that this inhibitory effect of hydrophobic NPs can be mitigated through PEGylation. Our results provide useful guidelines for molecular design of NPs as carrier systems for pulmonary drug delivery.
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Affiliation(s)
- Xubo Lin
- State Key Laboratory of Bioelectronics and Jiangsu key Laboratory for Biomaterials and Devices, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, People's Republic of China.
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78
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Lopez-Rodriguez E, Pérez-Gil J. Structure-function relationships in pulmonary surfactant membranes: from biophysics to therapy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:1568-85. [PMID: 24525076 DOI: 10.1016/j.bbamem.2014.01.028] [Citation(s) in RCA: 179] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [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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79
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Interaction of Nanoparticles with Lipid Monolayers and Lung Surfactant Films. MEASURING BIOLOGICAL IMPACTS OF NANOMATERIALS 2014. [DOI: 10.1007/11663_2014_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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80
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Beck-Broichsitter M, Ruppert C, Schmehl T, Günther A, Seeger W. Biophysical inhibition of synthetic vs. naturally-derived pulmonary surfactant preparations by polymeric nanoparticles. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:474-81. [DOI: 10.1016/j.bbamem.2013.10.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 10/16/2013] [Accepted: 10/21/2013] [Indexed: 12/24/2022]
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81
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Hu G, Jiao B, Shi X, Valle RP, Fan Q, Zuo YY. Physicochemical properties of nanoparticles regulate translocation across pulmonary surfactant monolayer and formation of lipoprotein corona. ACS NANO 2013; 7:10525-33. [PMID: 24266809 PMCID: PMC5362675 DOI: 10.1021/nn4054683] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Interaction with the pulmonary surfactant film, being the first line of host defense, represents the initial bio-nano interaction in the lungs. Such interaction determines the fate of the inhaled nanoparticles and their potential therapeutic or toxicological effect. Despite considerable progress in optimizing physicochemical properties of nanoparticles for improved delivery and targeting, the mechanisms by which inhaled nanoparticles interact with the pulmonary surfactant film are still largely unknown. Here, using combined in vitro and in silico methods, we show how hydrophobicity and surface charge of nanoparticles differentially regulate the translocation and interaction with the pulmonary surfactant film. While hydrophilic nanoparticles generally translocate quickly across the pulmonary surfactant film, a significant portion of hydrophobic nanoparticles are trapped by the surfactant film and encapsulated in lipid protrusions upon film compression. Our results support a novel model of pulmonary surfactant lipoprotein corona associated with inhaled nanoparticles of different physicochemical properties. Our data suggest that the study of pulmonary nanotoxicology and nanoparticle-based pulmonary drug delivery should consider this lipoprotein corona.
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Affiliation(s)
- Guoqing Hu
- The State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China
- Address correspondence to ;
| | - Bao Jiao
- The State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xinghua Shi
- The State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Russell P. Valle
- Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Qihui Fan
- Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Yi Y. Zuo
- Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
- Address correspondence to ;
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82
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Turkez H, Yousef MI, Sönmez E, Togar B, Bakan F, Sozio P, Stefano AD. Evaluation of cytotoxic, oxidative stress and genotoxic responses of hydroxyapatite nanoparticles on human blood cells. J Appl Toxicol 2013; 34:373-9. [DOI: 10.1002/jat.2958] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/09/2013] [Accepted: 09/30/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Hasan Turkez
- Department of Molecular Biology and Genetics, Faculty of Science; Erzurum Technical University; Erzurum Turkey
| | - Mokhtar I. Yousef
- Department of Environmental Studies, Institute of Graduate Studies and Research; Alexandria University; 21526 Alexandria Egypt
| | - Erdal Sönmez
- Department of Physics, K. K. Education Faculty; Atatürk University; Erzurum Turkey
- Department of Nanoscience & Nanoengineering, Advanced Materials Research Laboratory, Graduate School of Natural and Applied Sciences; Atatürk University; Erzurum Turkey
| | - Başak Togar
- Department of Biology, Faculty of Science; Atatürk University; Erzurum Turkey
| | - Feray Bakan
- SUNUM; Sabanci University; Tuzla Istanbul Turkey
| | - Piera Sozio
- Dipartimento di Farmacia; Università “G. D'Annunzio”; Chieti Italy
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83
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Alexandrova L, Nedyalkov M, Platikanov D, Razzetti R, Bianco F. Wetting behavior of pulmonary surfactant aqueous solutions. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3047-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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84
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Kondej D, Sosnowski TR. Alteration of biophysical activity of pulmonary surfactant by aluminosilicate nanoparticles. Inhal Toxicol 2013; 25:77-83. [PMID: 23363039 DOI: 10.3109/08958378.2012.756087] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The influence of five different types of aluminosilicate nanoparticles (NPs) on the dynamic surface activity of model pulmonary surfactant (PS) (Survanta) was studied experimentally using oscillating bubble tensiometry. Bentonite, halloysite and montmorillonite (MM) NPs, which are used as fillers of polymer composites, were characterized regarding the size distribution, morphology and surface area. Particle doses applied in the studies were estimated based on the inhalation rate and duration, taking into account the expected aerosol concentration and deposition efficiency after penetration of NPs into the alveolar region. The results indicate that aluminosilicate NPs at concentrations in the pulmonary liquid above 0.1 mg cm(-3) are capable of promoting alterations of the original dynamic biophysical activity of the PS. This effect is indicated by deviation of the minimum surface tension, stability index and the size of surface tension hysteresis. Such response is dependent on the type of NPs present in the system and is stronger when particle concentration increases. It is suggested that interactions between NPs and the PS must be related to the surfactant adsorption on the suspended particles, while in the case of surface-modified clay NPs the additional washout of surface-active components may be expected. It is speculated that observed changes in surface properties of the surfactant may be associated with undesired health effects following extensive inhalation of aluminosilicate NPs in the workplace.
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Affiliation(s)
- Dorota Kondej
- Department of Chemical, Aerosol and Biological Hazards, Central Institute for Labour Protection-National Research Institute, Warsaw, Poland.
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85
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Okada M, Furuzono T. Hydroxylapatite nanoparticles: fabrication methods and medical applications. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2012; 13:064103. [PMID: 27877527 PMCID: PMC5099760 DOI: 10.1088/1468-6996/13/6/064103] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 11/19/2012] [Indexed: 05/30/2023]
Abstract
Hydroxylapatite (or hydroxyapatite, HAp) exhibits excellent biocompatibility with various kinds of cells and tissues, making it an ideal candidate for tissue engineering, orthopedic and dental applications. Nanosized materials offer improved performances compared with conventional materials due to their large surface-to-volume ratios. This review summarizes existing knowledge and recent progress in fabrication methods of nanosized (or nanostructured) HAp particles, as well as their recent applications in medical and dental fields. In section 1, we provide a brief overview of HAp and nanoparticles. In section 2, fabrication methods of HAp nanoparticles are described based on the particle formation mechanisms. Recent applications of HAp nanoparticles are summarized in section 3. The future perspectives in this active research area are given in section 4.
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Affiliation(s)
- Masahiro Okada
- Department of Biomaterials, Osaka Dental University, 8-1 Kuzuha-Hanazono, Hirakata, Osaka, 573-1121, Japan
| | - Tsutomu Furuzono
- Department of Biomedical Engineering, School of Biology-Oriented Science and Technology, Kinki University, 930 Nishi-Mitani, Kinokawa, Wakayama, 649-6493, Japan
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86
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Farnoud AM, Fiegel J. Low concentrations of negatively charged sub-micron particles alter the microstructure of DPPC at the air–water interface. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.10.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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87
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Kuo CC, Kodama AT, Boatwright T, Dennin M. Particle size effects on collapse in monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13976-13983. [PMID: 22921324 DOI: 10.1021/la301543y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report on the impact of differently sized particles on the collapse of a Langmuir monolayer. We use an SDS-DODAB monolayer because it is known to collapse reversibly under compression and expansion cycles. Particles with diameters of 1 μm, 0.5 μm, 0.1 μm, and 20 nm are deposited on the SDS-DODAB monolayer. We find a critical particle size range of 0.1 to 0.5 μm that produces a transition from reversible to irreversible collapse. The nature of the collapse is determined through optical observations and surface pressure measurements. In addition, although 20 nm particles do not cause irreversible collapse in the monolayer, they significantly decrease the collapse pressure relative to the other systems. Therefore, we observe three distinct collapse behaviors-reversible, irreversible, and reversible at a reduced surface pressure.
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Affiliation(s)
- Chin-Chang Kuo
- Department of Physics and Astronomy, University of California, Irvine, California 92697, United States
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88
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Casals C, Cañadas O. Role of lipid ordered/disordered phase coexistence in pulmonary surfactant function. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:2550-62. [PMID: 22659676 DOI: 10.1016/j.bbamem.2012.05.024] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 05/03/2012] [Accepted: 05/22/2012] [Indexed: 12/27/2022]
Abstract
The respiratory epithelium has evolved to produce a complicated network of extracellular membranes that are essential for breathing and, ultimately, survival. Surfactant membranes form a stable monolayer at the air-liquid interface with bilayer structures attached to it. By reducing the surface tension at the air-liquid interface, surfactant stabilizes the lung against collapse and facilitates inflation. The special composition of surfactant membranes results in the coexistence of two distinct micrometer-sized ordered/disordered phases maintained up to physiological temperatures. Phase coexistence might facilitate monolayer folding to form three-dimensional structures during exhalation and hence allow the film to attain minimal surface tension. These folded structures may act as a membrane reserve and attenuate the increase in membrane tension during inspiration. The present review summarizes what is known of ordered/disordered lipid phase coexistence in lung surfactant, paying attention to the possible role played by domain boundaries in the monolayer-to-multilayer transition, and the correlations of biophysical inactivation of pulmonary surfactant with alterations in phase coexistence.
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Affiliation(s)
- Cristina Casals
- Departamento de Bioquimica y Biologia Molecular, Universidad Complutense de Madrid, Madrid, Spain.
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89
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Zhao X, Ng S, Heng BC, Guo J, Ma L, Tan TTY, Ng KW, Loo SCJ. Cytotoxicity of hydroxyapatite nanoparticles is shape and cell dependent. Arch Toxicol 2012; 87:1037-52. [PMID: 22415765 DOI: 10.1007/s00204-012-0827-1] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Accepted: 02/27/2012] [Indexed: 10/28/2022]
Abstract
Nanosized hydroxyapatite (nHA) has been proposed as drug delivery vehicles because of its biocompatibility. While the possible risks of nHA inducing inflammation have been highlighted, the specific influence of varying nHA particle morphology is still unclear. In order to establish this understanding, nHA of four different shapes--needle (nHA-ND), plate (nHA-PL), sphere (nHA-SP) and rod (nHA-RD)--were synthesized. The particle effects with the concentration of 10-300 μg/mL on cytotoxicity, oxygen species generation, production of inflammatory cytokines (TNF-α and IL-6), particle-cell association and cellular uptake were evaluated on BEAS-2B and RAW264.7 cells. Results show that nHA-ND and nHA-PL induced the most significant cell death in BEAS-2B cultures compared to nHA-SP and nHA-RD. Necrosis-apoptosis assay by FITC Annexin V and propidium iodide (PI) staining revealed loss of the majority of BEAS-2B by necrosis. No significant cell death was recorded in RAW264.7 cultures exposed to any of the nHA groups. Correspondingly, no significant differences were observed in TNF-α level for RAW264.7 cells upon incubation with nHA of different shapes. In addition, nHA-RD exhibited a higher degree of particle-cell association and internalization in both BEAS-2B and RAW264.7 cells, compared to nHA-ND. The phenomena suggested that higher particle-cell association and increased cellular uptake of nHA need not result in increased cytotoxicity, indicating the importance of particle shape on cytotoxicity. Specifically, needle- and plate-shaped nHA induced the most significant cell-specific cytotoxicity and IL-6 expression but showed the least particle-cell association. Taken collectively, we demonstrated the shape-dependent effects of nHA on cytotoxicity, inflammatory cytokine expression and particle-cell association.
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Affiliation(s)
- Xinxin Zhao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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90
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Sachan AK, Harishchandra RK, Bantz C, Maskos M, Reichelt R, Galla HJ. High-resolution investigation of nanoparticle interaction with a model pulmonary surfactant monolayer. ACS NANO 2012; 6:1677-1687. [PMID: 22288983 DOI: 10.1021/nn204657n] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The pulmonary surfactant film spanning the inner alveolar surface prevents alveolar collapse during the end-exhalation and reduces the work of breathing. Nanoparticles (NPs) present in the atmosphere or nanocarriers targeted through the pulmonary route for medical purposes challenge this biological barrier. During interaction with or passage of NPs through the alveolar surfactant, the biophysical functioning of the film may be altered. However, experimental evidence showing detailed biophysical interaction of NPs with the pulmonary surfactant film are scant. In this study, we have investigated the impact of a hydrophobic polyorganosiloxane (AmOrSil20) NPs on the integrity as well as on the structural organization of the model pulmonary surfactant film. Primarily, scanning force microscopic techniques and electron microscopy have been used to visualize the topology as well as to characterize the localization of nanoparticles within the compressed pulmonary surfactant film. We could show that the NPs partition in the fluid phase of the compressed film at lower surface pressure, and at higher surface pressure, such NPs interact extensively with the surface-associated structures. Major amounts of NPs are retained at the interface and are released slowly into the aqueous subphase during repeated compression/expansion cycles. Further, the process of vesicle insertion into the interfacial film was observed to slow down with increasing NP concentrations. The hydrophobic AmOrSil20 NPs up to a given concentration do not substantially affect the structural organization and functioning of pulmonary surfactant film; however, such NPs do show drastic impacts at higher concentrations.
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Affiliation(s)
- Amit Kumar Sachan
- Institute of Biochemistry, Westfälische Wilhelms Universität, Wilhelm-Klemm-Str.2, 48149 Münster, Germany
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91
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Wang YE, Zhang H, Fan Q, Neal CR, Zuo YY. Biophysical interaction between corticosteroids and natural surfactant preparation: implications for pulmonary drug delivery using surfactant a a carrier. SOFT MATTER 2012; 8:504-511. [PMID: 28747989 PMCID: PMC5522965 DOI: 10.1039/c1sm06444d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Intratracheal administration of corticosteroids using a natural pulmonary surfactant as a delivery vehicle has recently received significant attention in hopes of treating premature newborns with or at high risk for chronic lung disease. As a new practice, both the surfactant preparation used as the carrier and the corticosteroid delivered as the anti-inflammatory agent, and their mixing ratios, have not been standardized and optimized. Given the concern that corticosteroids delivered via a pulmonary surfactant may compromise its surface activity and thus worsen lung mechanics, the present study was carried out to characterize the biophysical interaction between a natural surfactant preparation, Infasurf, and two commonly used inhaled corticosteroids, budesonide and beclomethasone dipropionate (BDP). Based on surface activity measurements by the Langmuir balance and lateral film structure studied by atomic force microscopy, our findings suggest that when Infasurf is used as a carrier, a budesonide concentration less than 1 wt% of surfactant or a BDP concentration up to 10 wt % should not significantly affect the biophysical properties of Infasurf, thus being feasible for pulmonary delivery. Increasing corticosteroid concentration beyond this range leads to early collapse of the surfactant film due to increased film fluidization. Our study further suggests that different affinities to the surfactant films are responsible for the different behavior of budesonide and BDP. In addition to the translational value in treating chronic lung disease, this study may also have implications in inhaled steroid therapy to treat asthma.
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Affiliation(s)
- Yi E Wang
- Department of Mechanical Engineering, University of Hawaii at Manoa, 2540 Dole St, Holmes Hall 302, Honolulu, HI, 96822, USA. ; Tel: +1 808-956-9650
| | - Hong Zhang
- Department of Mechanical Engineering, University of Hawaii at Manoa, 2540 Dole St, Holmes Hall 302, Honolulu, HI, 96822, USA. ; Tel: +1 808-956-9650
- Department of Respiratory Medicine, Peking University First Hospital, Beijing, China 100034
| | - Qihui Fan
- Department of Mechanical Engineering, University of Hawaii at Manoa, 2540 Dole St, Holmes Hall 302, Honolulu, HI, 96822, USA. ; Tel: +1 808-956-9650
| | - Charles R Neal
- Department of Pediatrics, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, 96826, USA
| | - Yi Y Zuo
- Department of Mechanical Engineering, University of Hawaii at Manoa, 2540 Dole St, Holmes Hall 302, Honolulu, HI, 96822, USA. ; Tel: +1 808-956-9650
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92
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Tatur S, Badia A. Influence of hydrophobic alkylated gold nanoparticles on the phase behavior of monolayers of DPPC and clinical lung surfactant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:628-639. [PMID: 22118426 DOI: 10.1021/la203439u] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effect of hydrophobic alkylated gold nanoparticles (Au NPs) on the phase behavior and structure of Langmuir monolayers of dipalmitoylphosphatidylcholine (DPPC) and Survanta, a naturally derived commercial pulmonary surfactant that contains DPPC as the main lipid component and hydrophobic surfactant proteins SP-B and SP-C, has been investigated in connection with the potential implication of inorganic NPs in pulmonary surfactant dysfunction. Hexadecanethiolate-capped Au NPs (C(16)SAu NPs) with an average core diameter of 2 nm have been incorporated into DPPC monolayers in concentrations ranging from 0.1 to 0.5 mol %. Concentrations of up to 0.2 mol % in DPPC and 16 wt % in Survanta do not affect the monolayer phase behavior at 20 °C, as evidenced by surface pressure-area (π-A) and ellipsometric isotherms. The monolayer structure at the air/water interface was imaged as a function of the surface pressure by Brewster angle microscopy (BAM). In the liquid-expanded/liquid-condensed phase coexistence region of DPPC, the presence of 0.2 mol % C(16)SAu NPs causes the formation of many small, circular, condensed lipid domains, in contrast to the characteristic larger multilobes formed by pure lipid. Condensed domains of similar size and shape to those of DPPC with 0.2 mol % C(16)SAu NPs are formed by compressing Survanta, and these are not affected by the C(16)SAu NPs. Atomic force microscopy images of Langmuir-Schaefer-deposited films support the BAM observations and reveal, moreover, that at high surface pressures (i.e., 35 and 45 mN m(-1)) the C(16)SAu NPs form honeycomb-like aggregates around the polygonal condensed DPPC domains. In the Survanta monolayers, the C(16)SAu NPs were found to accumulate together with the proteins in the liquid-expanded phase around the circular condensed lipid domains. In conclusion, the presence of hydrophobic C(16)SAu NPs in amounts that do not influence the π-A isotherm alters the nucleation, growth, and morphology of the condensed domains in monolayers of DPPC but not of those of Survanta. Systematic investigations of the effect of the interaction of chemically defined NPs with the lipid and protein components of lung surfactant on the physicochemical properties of surfactant films are pertinent to understanding how inhaled NPs impact pulmonary function.
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Affiliation(s)
- Sabina Tatur
- Department of Chemistry, Université de Montréal, C.P. 6128 succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
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