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Abouelsayed A, Hezma AM, El-Bahy GS, Abdelrazzak AB. Modification of protein secondary structure as an indicator of radiation-induced abscopal effect: A spectroscopic investigation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 287:122093. [PMID: 36375289 DOI: 10.1016/j.saa.2022.122093] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/20/2022] [Accepted: 11/06/2022] [Indexed: 06/16/2023]
Abstract
In this study, we investigate the abscopal effect induced in the brain, lung and kidney as a result of partial irradiation of experimental animals with 2 Gy γ-rays. Modifications in the protein secondary structure were used as indicator for the abscopal effect. FTIR spectroscopy and analysis of the amide I and amide II absorption bands suggested possible modifications in the protein secondary structure in the brain and kidney following irradiation. Significant shift in the amide I band was recorded only in the brain. However, the amide I/amide II band area ratio for the three organs examined varied differentially in the irradiated groups as compared with the sham-irradiated group. Employing the lorentzian model to analyze the amide I band of the FTIR spectra, we dissected the amide I band into its components, each component represents one form of the protein secondary structure. Calculation of the weight percentage contribution of each of the protein secondary structure revealed decrease in the α-helix contribution associated with equivalent increase in β-sheets and turns/random coils contributions in the brain and kidney, however the response was more evident in the brain. No change in the α-helix or β-sheets contributions was reported in the lung following irradiation. The data suggest the induction of abscopal effect in the brain and kidney rather than the lung in the form of protein conformation modification. The data also indicate that the abscopal effect is comparable to the effect of direct irradiation in both of the brain and kidney.
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Affiliation(s)
- A Abouelsayed
- Spectroscopy Department, Physics Research Institute, National Research Centre, Cairo 12622, Egypt; Molecular and Fluorescence Lab., Central Laboratories Network, National Research Centre, Cairo 12622, Egypt
| | - A M Hezma
- Spectroscopy Department, Physics Research Institute, National Research Centre, Cairo 12622, Egypt
| | - Gamal S El-Bahy
- Spectroscopy Department, Physics Research Institute, National Research Centre, Cairo 12622, Egypt
| | - Abdelrazek B Abdelrazzak
- Spectroscopy Department, Physics Research Institute, National Research Centre, Cairo 12622, Egypt.
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2
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Struczyńska M, Firkowska-Boden I, Scheuer K, Jandt KD. Rutile facet-dependent fibrinogen conformation: Why crystallographic orientation matters. Colloids Surf B Biointerfaces 2022; 215:112506. [PMID: 35487071 DOI: 10.1016/j.colsurfb.2022.112506] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 04/10/2022] [Accepted: 04/12/2022] [Indexed: 11/30/2022]
Abstract
Previous studies implied that single crystalline rutile surfaces have the ability to guide the functionality of adsorbed blood plasma proteins. However, a clear relation between the rutile crystallographic orientation and conformation of adsorbed proteins is still missing. Here, we examine the adsorption characteristics of human plasma fibrinogen (HPF) on atomically flat single rutile crystals with (110), (100), (101) and (001) facets. By direct visualization of individual protein molecules through atomic force microscopy (AFM) imaging, the distinct conformations of HPF were determined depending on rutile surface crystallographic orientation. In particular, dominant trinodular and globular conformation was found on (110) and (001) facets, respectively. The observed variations of HPF conformation were reasoned from the surface water contact angle and surface energy point of view. By analyzing AFM-based force measurements, statistically significant changes in surface energies of rutile surfaces covered with HPF were determined and linked to HPF conformation. Furthermore, the facet-dependent structural rearrangement of HPF was indirectly confirmed through deconvolution of high-resolution X-ray photoelectron spectroscopy (XPS) carbon and nitrogen spectra. The globular, and thus native-like HPF conformation observed on (001) facet, was reflected in the lowest level of amino group formation. We propose that the mechanism behind the crystallographic orientation-induced HPF conformation is driven by the facet-specific surface hydrophilicity and energy. From the biomedical material perspective, our results demonstrate that the conformation of HPF can be guided by controlling the crystallographic orientation of the underlying material surface. This might be beneficial to the field of titanium-based biomaterials design and development.
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Affiliation(s)
- Maja Struczyńska
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Izabela Firkowska-Boden
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany.
| | - Karl Scheuer
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Klaus D Jandt
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research (OSIM), Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany; Jena School for Microbial Communication (JSMC), Neugasse 23, 07743 Jena, Germany.
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3
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Mollahosseini A, Saadati S, Abdelrasoul A. A Comparative Assessment of Human Serum Proteins Interactions with Hemodialysis Clinical Membranes using Molecular Dynamics Simulation. MACROMOL THEOR SIMUL 2022. [DOI: 10.1002/mats.202200016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Arash Mollahosseini
- Department of Chemical and Biological Engineering University of Saskatchewan 57 Campus Drive Saskatoon Saskatchewan S7N 5A9 Canada
| | - Shaghayegh Saadati
- Department of Chemical and Biological Engineering University of Saskatchewan 57 Campus Drive Saskatoon Saskatchewan S7N 5A9 Canada
- Division of Biomedical Engineering University of Saskatchewan 57 Campus Drive Saskatoon Saskatchewan S7N 5A9 Canada
| | - Amira Abdelrasoul
- Department of Chemical and Biological Engineering University of Saskatchewan 57 Campus Drive Saskatoon Saskatchewan S7N 5A9 Canada
- Division of Biomedical Engineering University of Saskatchewan 57 Campus Drive Saskatoon Saskatchewan S7N 5A9 Canada
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Laslo V, Pinzaru SC, Zaguła G, Kluz M, Vicas SI, Cavalu S. Synergic effect of selenium nanoparticles and lactic acid bacteria in reduction cadmium toxicity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131325] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kuchinka J, Willems C, Telyshev DV, Groth T. Control of Blood Coagulation by Hemocompatible Material Surfaces-A Review. Bioengineering (Basel) 2021; 8:215. [PMID: 34940368 PMCID: PMC8698751 DOI: 10.3390/bioengineering8120215] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022] Open
Abstract
Hemocompatibility of biomaterials in contact with the blood of patients is a prerequisite for the short- and long-term applications of medical devices such as cardiovascular stents, artificial heart valves, ventricular assist devices, catheters, blood linings and extracorporeal devices such as artificial kidneys (hemodialysis), extracorporeal membrane oxygenation (ECMO) and cardiopulmonary bypass. Although lower blood compatibility of materials and devices can be handled with systemic anticoagulation, its side effects, such as an increased bleeding risk, make materials that have a better hemocompatibility highly desirable, particularly in long-term applications. This review provides a short overview on the basic mechanisms of blood coagulation including plasmatic coagulation and blood platelets, as well as the activation of the complement system. Furthermore, a survey on concepts for tailoring the blood response of biomaterials to improve the hemocompatibility of medical devices is given which covers different approaches that either inhibit interaction of material surfaces with blood components completely or control the response of the coagulation system, blood platelets and leukocytes.
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Affiliation(s)
- Janna Kuchinka
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (J.K.); (C.W.)
| | - Christian Willems
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (J.K.); (C.W.)
| | - Dmitry V. Telyshev
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia;
- Laboratory of Biomedical Nanotechnologies, Institute of Bionic Technologies and Engineering, I.M. Sechenov First Moscow State University, 119991 Moscow, Russia
| | - Thomas Groth
- Department Biomedical Materials, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (J.K.); (C.W.)
- Laboratory of Biomedical Nanotechnologies, Institute of Bionic Technologies and Engineering, I.M. Sechenov First Moscow State University, 119991 Moscow, Russia
- Interdisciplinary Center of Materials Science, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
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Nanostructure of bioactive glass affects bone cell attachment via protein restructuring upon adsorption. Sci Rep 2021; 11:5763. [PMID: 33707489 PMCID: PMC7952393 DOI: 10.1038/s41598-021-85050-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 02/19/2021] [Indexed: 01/04/2023] Open
Abstract
The nanostructure of engineered bioscaffolds has a profound impact on cell response, yet its understanding remains incomplete as cells interact with a highly complex interfacial layer rather than the material itself. For bioactive glass scaffolds, this layer comprises of silica gel, hydroxyapatite (HA)/carbonated hydroxyapatite (CHA), and absorbed proteins—all in varying micro/nano structure, composition, and concentration. Here, we examined the response of MC3T3-E1 pre-osteoblast cells to 30 mol% CaO–70 mol% SiO2 porous bioactive glass monoliths that differed only in nanopore size (6–44 nm) yet resulted in the formation of HA/CHA layers with significantly different microstructures. We report that cell response, as quantified by cell attachment and morphology, does not correlate with nanopore size, nor HA/CHO layer micro/nano morphology, or absorbed protein amount (bovine serum albumin, BSA), but with BSA’s secondary conformation as indicated by its β-sheet/α-helix ratio. Our results suggest that the β-sheet structure in BSA interacts electrostatically with the HA/CHA interfacial layer and activates the RGD sequence of absorbed adhesion proteins, such as fibronectin and vitronectin, thus significantly enhancing the attachment of cells. These findings provide new insight into the interaction of cells with the scaffolds’ interfacial layer, which is vital for the continued development of engineered tissue scaffolds.
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Nano-Scale Modifications of Amniotic Membrane Induced by UV and Antibiotic Treatment: Histological, AFM and FTIR Spectroscopy Evidence. MATERIALS 2021; 14:ma14040863. [PMID: 33670334 PMCID: PMC7917607 DOI: 10.3390/ma14040863] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 02/02/2021] [Accepted: 02/09/2021] [Indexed: 12/23/2022]
Abstract
The efficiency of amniotic membrane (AM) transplantation in different types of ocular surface disorders is due to its outstanding properties such as antifibrotic, antibacterial, anti-inflammatory and antiangiogenic, working as a versatile scaffold to promote corneal tissue epithelialization. A proper preparation, preservation and clinical application are crucial for the best outcomes in the treatment of different severe ocular disorders, taking into account its fragility. In this context, by combining high-sensitivity tools such as atomic force microscopy (AFM) and Fourier transform infrared (FTIR) spectroscopy with histological and immunohistochemical examination, we aimed to investigate the ultrastructural modifications of the amniotic membrane (AM) upon UV exposure and/or antibiotic treatment, with relevance for clinical applications in ocular surface surgery. From the morphological point of view, we noticed a loss of cuboidal cells in the basal membrane, accompanied by the splitting of collagen fibers upon UV and/or gentamicin treatment, while structural alteration of proteins was evidenced by the FTIR quantitative analysis of the secondary structure. A decrease in α-helix and β-sheet content, accompanied by increased content in less ordered structures (turns, random and side chains), was noticed after all the treatments. At the nano-scale, AFM details showed modifications of collagen fibrils in terms of their thickness and network compaction upon gentamicin and/or UV treatment. The enzymatic digestion assay demonstrated that UV exposure significantly reduces the degradation rate of the AM, while gentamicin treatment promotes an accelerated enzymatic digestion upon UV exposure. In order to highlight the clinical impact of the research, a clinical case is presented showing the relevance of amniotic membrane transplantation in pterygium surgery.
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Firkowska-Boden I, Helbing C, Dauben TJ, Pieper M, Jandt KD. How Nanotopography-Induced Conformational Changes of Fibrinogen Affect Platelet Adhesion and Activation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11573-11580. [PMID: 32921061 DOI: 10.1021/acs.langmuir.0c02094] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The conformational state of adsorbed human plasma fibrinogen (HPF) has been recognized as the determinant factor in platelet adhesion and thrombus formation on blood-contacting biomaterials. Studies have highlighted the ability to control the HPF conformation merely by tailoring surface nanotopographical features. However, a clear relationship between the conformational changes of adsorbed HPF and the degree of platelet adhesion and activation achieved with different surface nanotopographies is still unclear. Here, we examined HPF assembly characteristics on nanostructured polybutene-1 (PB-1) surfaces with nanosized lamellar crystals (LCs), needle-like crystals (NLCs), and a nanostructured high-density polyethylene (HDPE) surface with shish-kebab crystals (SKCs), at a biologically relevant HPF concentration. By exposing the nanostructured surfaces with preadsorbed HPF to human platelets, significant differences in platelet response on LCs/SKCs and NLCs were identified. The former presented a uniform monolayer in the advanced stage of activation, whereas the latter exhibited minimal adhesion and the early stage of activation. Distinct platelet response was related to the postadsorption conformational changes in HPF, which were confirmed by topography-dependent shifts of the amide I band in attenuated total reflection-Fourier transform infrared (ATR-FTIR) analysis. Supported by atomic force microscopy (AFM) characterization, we propose that the mechanism behind the nanotopography-induced HPF conformation is driven by the interplay between the aspect ratios of polymeric crystals and HPF. From the biomedical perspective, our work reveals that surface structuring in a nanoscale size regime can provide a fine-tuning mechanism to manipulate HPF conformation, which can be exploited for the design of thromboresistant biomaterials surfaces.
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Affiliation(s)
- Izabela Firkowska-Boden
- Chair of Materials Science, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Christian Helbing
- Chair of Materials Science, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Thomas J Dauben
- Chair of Materials Science, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Maja Pieper
- Chair of Materials Science, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Klaus D Jandt
- Chair of Materials Science, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
- Jena Center for Soft Matter, Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
- Jena School for Microbial Communication (JSMC), Neugasse 23, 07743 Jena, Germany
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10
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Gelatin/zein fiber mats encapsulated with resveratrol: Kinetics, antibacterial activity and application for pork preservation. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105577] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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Zuo X, Zhang H, Zhou T, Duan Y, Shou H, Yu S, Gao C. Spheroids of Endothelial Cells and Vascular Smooth Muscle Cells Promote Cell Migration in Hyaluronic Acid and Fibrinogen Composite Hydrogels. RESEARCH 2020; 2020:8970480. [PMID: 32159162 PMCID: PMC7049785 DOI: 10.34133/2020/8970480] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 12/02/2019] [Indexed: 12/28/2022]
Abstract
Cell migration plays a pivotal role in many pathological and physiological processes. So far, most of the studies have been focused on 2-dimensional cell adhesion and migration. Herein, the migration behaviors of cell spheroids in 3D hydrogels obtained by polymerization of methacrylated hyaluronic acid (HA-MA) and fibrinogen (Fg) with different ratios were studied. The Fg could be released to the medium gradually along with time prolongation, achieving the dynamic change of hydrogel structures and properties. Three types of cell spheroids, i.e., endothelial cell (EC), smooth muscle cell (SMC), and EC-SMC spheroids, were prepared with 10,000 cells in each, whose diameters were about 343, 108, and 224 μm, respectively. The composite hydrogels with an intermediate ratio of Fg allowed the fastest 3D migration of cell spheroids. The ECs-SMCs migrated longest up to 3200 μm at day 14, whereas the SMC spheroids migrated slowest with a distance of only ~400 μm at the same period of time. The addition of free RGD or anti-CD44 could significantly reduce the migration distance, revealing that the cell-substrate interactions take the major roles and the migration is mesenchymal dependent. Moreover, addition of anti-N-cadherin and MMP inhibitors also slowed down the migration rate, demonstrating that the degradation of hydrogels and cell-cell interactions are also largely involved in the cell migration. RT-PCR measurement showed that expression of genes related to cell adhesion and antiapoptosis, and angiogenesis was all upregulated in the EC-SMC spheroids than single EC or SMC spheroids, suggesting that the use of composite cell spheroids is more promising to promote cell-substrate interactions and maintenance of cell functions.
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Affiliation(s)
- Xingang Zuo
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Haolan Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Tong Zhou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yiyuan Duan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.,Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou 310058, China
| | - Hao Shou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shan Yu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.,Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou 310058, China
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12
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Joppe M, D’Imprima E, Salustros N, Paithankar KS, Vonck J, Grininger M, Kühlbrandt W. The resolution revolution in cryoEM requires high-quality sample preparation: a rapid pipeline to a high-resolution map of yeast fatty acid synthase. IUCRJ 2020; 7:220-227. [PMID: 32148850 PMCID: PMC7055384 DOI: 10.1107/s2052252519017366] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
Single-particle electron cryo-microscopy (cryoEM) has undergone a 'resolution revolution' that makes it possible to characterize megadalton (MDa) complexes at atomic resolution without crystals. To fully exploit the new opportunities in molecular microscopy, new procedures for the cloning, expression and purification of macromolecular complexes need to be explored. Macromolecular assemblies are often unstable, and invasive construct design or inadequate purification conditions and sample-preparation methods can result in disassembly or denaturation. The structure of the 2.6 MDa yeast fatty acid synthase (FAS) has been studied by electron microscopy since the 1960s. Here, a new, streamlined protocol for the rapid production of purified yeast FAS for structure determination by high-resolution cryoEM is reported. Together with a companion protocol for preparing cryoEM specimens on a hydrophilized graphene layer, the new protocol yielded a 3.1 Å resolution map of yeast FAS from 15 000 automatically picked particles within a day. The high map quality enabled a complete atomic model of an intact fungal FAS to be built.
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Affiliation(s)
- Mirko Joppe
- Institute of Organic Chemistry and Chemical Biology, Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Max-von-Laue-Strasse 15, 60438 Frankfurt am Main, Germany
| | - Edoardo D’Imprima
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue Strasse 3, 60438 Frankfurt am Main, Germany
| | - Nina Salustros
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue Strasse 3, 60438 Frankfurt am Main, Germany
| | - Karthik S. Paithankar
- Institute of Organic Chemistry and Chemical Biology, Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Max-von-Laue-Strasse 15, 60438 Frankfurt am Main, Germany
| | - Janet Vonck
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue Strasse 3, 60438 Frankfurt am Main, Germany
| | - Martin Grininger
- Institute of Organic Chemistry and Chemical Biology, Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Max-von-Laue-Strasse 15, 60438 Frankfurt am Main, Germany
| | - Werner Kühlbrandt
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue Strasse 3, 60438 Frankfurt am Main, Germany
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Anil Kumar S, Alonzo M, Allen SC, Abelseth L, Thakur V, Akimoto J, Ito Y, Willerth SM, Suggs L, Chattopadhyay M, Joddar B. A Visible Light-Cross-Linkable, Fibrin-Gelatin-Based Bioprinted Construct with Human Cardiomyocytes and Fibroblasts. ACS Biomater Sci Eng 2019; 5:4551-4563. [PMID: 32258387 PMCID: PMC7117097 DOI: 10.1021/acsbiomaterials.9b00505] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In this study, fibrin was added to a photo-polymerizable gelatin-based bioink mixture to fabricate cardiac cell-laden constructs seeded with human induced pluripotent stem cell-derived cardiomyocytes (iPS-CM) or CM cell lines with cardiac fibroblasts (CF). The extensive use of platelet-rich fibrin, its capacity to offer patient specificity, and the similarity in composition to surgical glue prompted us to include fibrin in the existing bioink composition. The cell-laden bioprinted constructs were cross-linked to retain a herringbone pattern via a two-step procedure including the visible light cross-linking of furfuryl-gelatin followed by the chemical cross-linking of fibrinogen via thrombin and calcium chloride. The printed constructs revealed an extremely porous, networked structure that afforded long-term in vitro stability. Cardiomyocytes printed within the sheet structure showed excellent viability, proliferation, and expression of the troponin I cardiac marker. We extended the utility of this fibrin-gelatin bioink toward coculturing and coupling of CM and cardiac fibroblasts (CF), the interaction of which is extremely important for maintenance of normal physiology of the cardiac wall in vivo. This enhanced "cardiac construct" can be used for drug cytotoxicity screening or unraveling triggers for heart diseases in vitro.
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Affiliation(s)
- Shweta Anil Kumar
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), Department of Metallurgical, Materials and Biomedical Engineering, M201 Metallurgy Building, United States
| | - Matthew Alonzo
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), Department of Metallurgical, Materials and Biomedical Engineering, M201 Metallurgy Building, United States
| | - Shane C. Allen
- Department of Biomedical Engineering, The University of Texas at Austin, 110 Inner Campus Drive, Austin, Texas 78712, United States
| | - Laila Abelseth
- Department of Mechanical Engineering, University of Victoria, Engineering Office Wing, Room 548, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
- Biomedical Engineering Program, University of Victoria, Engineering Office Wing, Room 548, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Vikram Thakur
- Department of Molecular and Translational Medicine, Center of Emphasis in Diabetes and Metabolism, Texas Tech University Health Sciences Center, 5001 El Paso Drive, El Paso, Texas 79905, United States
| | - Jun Akimoto
- Nano Medical Engineering Laboratory, RIKEN Custer for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yoshihiro Ito
- Nano Medical Engineering Laboratory, RIKEN Custer for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Emergent Bioengineering Materials Research Team, RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Stephanie M. Willerth
- Department of Mechanical Engineering, University of Victoria, Engineering Office Wing, Room 548, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
- Biomedical Engineering Program, University of Victoria, Engineering Office Wing, Room 548, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
- Division of Medical Sciences, University of Victoria, Engineering Office Wing, Room 548, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
- International Collaboration on Repair Discoveries, University of British Columbia, 818 West 10th Avenue, Vancouver, British Columbia V5Z 1M9, Canada
| | - Laura Suggs
- Department of Biomedical Engineering, The University of Texas at Austin, 110 Inner Campus Drive, Austin, Texas 78712, United States
| | - Munmun Chattopadhyay
- Department of Molecular and Translational Medicine, Center of Emphasis in Diabetes and Metabolism, Texas Tech University Health Sciences Center, 5001 El Paso Drive, El Paso, Texas 79905, United States
| | - Binata Joddar
- Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), Department of Metallurgical, Materials and Biomedical Engineering, M201 Metallurgy Building, United States
- Border Biomedical Research Center, University of Texas at El Paso, 500 West University Avenue, El Paso, Texas 79968, United States
- Nano Medical Engineering Laboratory, RIKEN Custer for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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Tian Y, Larsson K. Effect by Diamond Surface Modification on Biomolecular Adhesion. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E865. [PMID: 30875868 PMCID: PMC6471043 DOI: 10.3390/ma12060865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/06/2019] [Accepted: 03/11/2019] [Indexed: 11/17/2022]
Abstract
Diamond, as material, show very attractive properties. They include superior electronic properties (when doped), chemical inertness, controllable surface termination, and biocompatibility. It is thus clear that surface termination is very important for those applications where the implant material is based on diamond. The present theoretical work has focused on the effect of diamond surface termination, in combination with type of surface plane, on the adhesion of important biomolecules for vascularization and bone regeneration. These biomolecules include Arginine-Glycine-Aspartic acid (RGD), Chitosan, Heparin, Bone Morphogenetic Protein 2 (BMP2), Angiopoietin 1 (AGP1), Fibronectin and Vascular Endothelial Growth Factor (VEGF). The various surface planes are diamond diamond (100)-2x1 and (111). The theoretical results show that the non-covalent binding of these biomolecules is in proportion with their molecular weights. Moreover, three groups of biomolecules were observed for both types of surface planes. The most strongly binding biomolecule was the BMP2 molecule. The smaller polypeptides (RGD, Chitosan and Heparin) formed a less strongly binding group. Finally, the biomolecules VEGF, Fibronectin and Angiopoietin showed bond strengths numerically in between the other two groups (thereby forming a third group). Moreover, the (111) surface was generally observed to display a stronger bonding of the biomolecules, as compared with the (100)-2x1 surface.
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Affiliation(s)
- Yuan Tian
- Department of Chemistry-Ångström Laboratory, Uppsala University, BOX 538, 75121 Uppsala, Sweden.
| | - Karin Larsson
- Department of Chemistry-Ångström Laboratory, Uppsala University, BOX 538, 75121 Uppsala, Sweden.
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15
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Ergene E, Yagci BS, Gokyer S, Eyidogan A, Aksoy EA, Yilgor Huri P. A novel polyurethane-based biodegradable elastomer as a promising material for skeletal muscle tissue engineering. ACTA ACUST UNITED AC 2019; 14:025014. [PMID: 30665203 DOI: 10.1088/1748-605x/ab007a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A key challenge in skeletal muscle tissue engineering is the choice of a proper scaffolding material as it should demonstrate elastic behavior to withstand and support the dynamic loading of the tissue microenvironment while being biodegradable and biocompatible. In this study, we tested the applicability of a novel biodegradable polyurethane (PU) elastomer chain extended with fibrinogen (Fib) to fulfill these requirements. Biodegradable polyurethane-fibrinogen (PU-Fib) elastomers were synthesized by step-wise condensation polymerization. Firstly, PU prepolymer was synthesized and then Fib was integrated into PU prepolymer during the second step of polymerization. The chemical, thermal, viscoelastic, mechanical and biodegradation properties of PU-Fib were characterized. FTIR-ATR spectrum showed amide bands specific to PU and Fib, DSC thermograms showed the suitable integration between the components. Dynamic mechanical analysis revealed Tg and Tα* transitions at 64.5 °C and 38.4 °C, respectively. PU and Fib had shown chemically compatible interactions and when compared to PCL, PU-Fib possessed viscoelastic properties more suitable to the native tissue. PU-Fib films were produced and seeded with C2C12 mouse myoblasts. Uniaxial cyclic stretch was applied to the cell seeded films for 21 d to mimic the native dynamic tissue microenvironment. Cell proliferation, viability and the expression of muscle-specific markers (immunofluorescent staining for myogenin and myosin heavy chain) were assessed. Myoblasts proliferated well on PU-Fib films; aligned parallel along their long edge, and express myogenic markers under biomimetic dynamic culture. It was possible to culture myoblasts with high viability on PU-Fib elastomeric films mimicking native muscle microenvironment.
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Affiliation(s)
- Emre Ergene
- Ankara University Faculty of Engineering, Department of Biomedical Engineering, Ankara, Turkey. Ankara University Biotechnology Institute, Ankara, Turkey
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16
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Lv L, Xie Y, Li K, Hu T, Lu X, Cao Y, Zheng X. Unveiling the Mechanism of Surface Hydrophilicity-Modulated Macrophage Polarization. Adv Healthc Mater 2018; 7:e1800675. [PMID: 30106513 DOI: 10.1002/adhm.201800675] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/24/2018] [Indexed: 12/22/2022]
Abstract
With inflammation increasingly recognized as a key factor that influences fracture healing, the immunologic response is considered to play a pivotal role in determining implant-mediated osteogenesis. Herein, this paper demonstrates that modification of the surface hydrophilicity of Ti surface oxides can be utilized to control immune response by steering the macrophage polarization toward pro- or anti-inflammation phenotype. Enhanced anti-inflammatory and prohealing performance of macrophages is observed on hydrophilic surfaces compared to hydrophobic ones. Further study on the detailed mechanism demonstrates that the surface hydrophilicity controls specific proteins (fibronectin and fibrinogen) adsorption and conformation, which activate different signaling pathways (PI3K and NF-κB) through selective expression of integrin β1 or β2 to influence the behaviors of macrophages. Thus, this study presents a mechanism of macrophage polarization modulated by surface hydrophilicity for the surface design of advanced implant materials with satisfactory anti-inflammatory and osteogenesis-promoting properties.
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Affiliation(s)
- Lin Lv
- Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
- University of Chinese Academy of Sciences 19 Yuquan Road Beijing 100049 P. R. China
| | - Youtao Xie
- Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
| | - Kai Li
- Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
| | - Tao Hu
- Department of Spine SurgeryShanghai East HospitalTongji University School of Medicine Shanghai 200050 P. R. China
| | - Xiang Lu
- Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
- University of Chinese Academy of Sciences 19 Yuquan Road Beijing 100049 P. R. China
| | - Yunzhen Cao
- Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
| | - Xuebin Zheng
- Key Laboratory of Inorganic Coating Materials CASShanghai Institute of CeramicsChinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
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17
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Hasan A, Waibhaw G, Pandey LM. Conformational and Organizational Insights into Serum Proteins during Competitive Adsorption on Self-Assembled Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8178-8194. [PMID: 29936836 DOI: 10.1021/acs.langmuir.8b01110] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Physicochemical interactions of proteins with surfaces mediate the interactions between the implant and the biological system. Surface chemistry of the implant is crucial as it regulates the events at the interface. The objective of this study was to explore the performance of modified surfaces for such interactions relevant to various biomedical applications. Because of a wide range of surface wettability, we aimed to study protein behavior (i.e., conformational changes and their packing) during competitive protein adsorption. Three serum proteins (bovine serum albumin, BSA; fibrinogen, FB; and immunoglobulin G, IgG) were tested for their conformational changes and orientation upon adsorption on hydrophilic (COOH and amine), moderately hydrophobic (mixed and hybrid), and hydrophobic (octyl) surfaces generated via silanization. Modified surfaces were characterized using Fourier-transform infrared spectroscopy, contact angle, and atomic force microscopy (AFM) techniques. Adsorbed masses of proteins from single and binary protein solutions on different surfaces were quantified along with their secondary structure analyses. Maximum adsorbed protein masses were found to be on negatively charged and hydrophobic (octyl) surfaces because of ionic and hydrophobic interactions between protein molecules and surfaces, respectively. Side-on and end-on orientations of adsorbed protein molecules were analyzed using theoretical and AFM analyses. We observed compact and elongated forms of BSA molecules on hydrophilic and hydrophobic surfaces, respectively. We further found a linear increase in the α-helix content of BSA and β-sheet contents of FB and IgG proteins with the increasing side-on (%)-oriented protein molecules on the surfaces. This indicates that side-on orientations of adsorbed FB and IgG lead to the formation of β-sheets. Sodium dodecyl sulfate polyacrylamide gel electrophoresis was employed to quantify the protein types and their ratio in competitively adsorbed proteins on different surfaces. A theoretical analysis was also used to determine the % secondary structures of competitively adsorbed proteins from BSA/FB and BSA/IgG solutions, which very well agreed with experimental results. The competitive protein adsorption from both BSA/FB and BSA/IgG solutions was found to be entropy-driven, as revealed by thermodynamic studies performed using isothermal titration calorimetry.
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Affiliation(s)
- Abshar Hasan
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
| | - Gyan Waibhaw
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
| | - Lalit M Pandey
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
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18
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Altunbek M, Keleştemur S, Baran G, Çulha M. Role of modification route for zinc oxide nanoparticles on protein structure and their effects on glioblastoma cells. Int J Biol Macromol 2018; 118:271-278. [PMID: 29908275 DOI: 10.1016/j.ijbiomac.2018.06.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 05/30/2018] [Accepted: 06/12/2018] [Indexed: 10/14/2022]
Abstract
Zinc oxide nanoparticles (ZnO) are presented as potential cancer therapeutic agent based on their surface properties. In this study, the most abundant blood proteins, albumin, fibrinogen and apo-transferrin, were covalently bound (c-ZnO NPs) and nonspecifically adsorbed (n-ZnO NPs) onto ZnO NPs to evaluate the role of modification route on protein structure and their effects on glioblastoma cells. The success of modification and structures of proteins on ZnO NPs were characterized with FT-IR. It was found that non-covalent interaction significantly damaged the secondary structure of proteins compared to those covalently attached to the ZnO nanoparticle. The effects of modified ZnO NPs were investigated by evaluating viability, cycle, and death mechanisms of glioblastoma (U373) cells. n-ZnO NPs were found more toxic compared to the pristine and c-ZnO NPs. However, c-ZnO NPs with albumin and apo-transferrin both perturbed the cell cycle function, and decreased the necrotic cell death rate of U373 cells below toxic concentration, suggesting their potential curative effect on glioblastoma cells.
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Affiliation(s)
- Mine Altunbek
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Ataşehir, Istanbul 34755, Turkey
| | - Seda Keleştemur
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Ataşehir, Istanbul 34755, Turkey
| | - Gülin Baran
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Ataşehir, Istanbul 34755, Turkey
| | - Mustafa Çulha
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Ataşehir, Istanbul 34755, Turkey.
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19
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Koo MA, Lee MH, Kwon BJ, Seon GM, Kim MS, Kim D, Nam KC, Park JC. Exogenous ROS-induced cell sheet transfer based on hematoporphyrin-polyketone film via a one-step process. Biomaterials 2018; 161:47-56. [DOI: 10.1016/j.biomaterials.2018.01.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/15/2018] [Accepted: 01/19/2018] [Indexed: 12/14/2022]
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20
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Wang H, Akcora P. Examining lysozyme structures on polyzwitterionic brush surfaces. Colloids Surf B Biointerfaces 2017; 160:215-219. [PMID: 28938231 DOI: 10.1016/j.colsurfb.2017.09.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 09/12/2017] [Accepted: 09/15/2017] [Indexed: 11/26/2022]
Abstract
Conformational structures of lysozyme at the interfaces of hydrophilic polymer poly[2-(methacryloyloxy)ethyl dimethyl-(3-sulfopropyl)ammonium hydroxide] (PMEDSAH), are examined to understand the role of protein-polymer interactions on the stability of lysozyme. This work underpins the effect of hydration layer on the structures of physically adsorbed lysozyme on PMEDSAH brushes. Hydrophilic nature and strength of hydration layers around brushes are controlled by varying the brush thickness and temperature. We measured that lysozyme is structurally less stable on 15nm thick hydrophilic PMEDSAH brushes at 75°C than at room temperature. To the contrary, 5-8nm thick brushes stretch in hydrated state by heating, hence yield higher structural stability of lysozyme. These results suggest that short polyzwitterionic brushes can facilitate improved biomaterial interactions that are essential for biosensors performing at elevated temperatures.
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Affiliation(s)
- Haoyu Wang
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, 1 Castle Point on Hudson, Hoboken, NJ, 07030, USA
| | - Pinar Akcora
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, 1 Castle Point on Hudson, Hoboken, NJ, 07030, USA.
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21
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Kowal TJ, Golovchak R, Chokshi T, Harms J, Thamma U, Jain H, Falk MM. Role of phase separation on the biological performance of 45S5 Bioglass ®. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:161. [PMID: 28905286 DOI: 10.1007/s10856-017-5976-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
We analyzed the biological performance of spinodally and droplet-type phase-separated 45S5 Bioglass® generated by quenching the melt from different equilibrium temperatures. MC3T3-E1 pre-osteoblast cells attached more efficiently to 45S5 Bioglass® with spinodal than to the one with droplet morphology, providing the first demonstration of the role of micro-/nano-scale on the bioactivity of Bioglass®. Upon exposure to biological solutions, phosphate buffered saline (PBS) and cell culture medium (α-MEM), a layer of hydroxyapatite (HA) formed on both glass morphologies. Although both Bioglass® varieties were incubated under identical conditions, and physico-chemical characteristics of the HA layers were similar, the adsorption magnitude of a model protein, bovine serum albumin (BSA, an abundant blood serum component) and its β-sheet/β-turn ratio and α-helix content were significantly higher on spinodal than droplet type Bioglass®. These results indicate that: (i) a protein layer quickly adsorbs on the surface of 45S5 Bioglass® varieties (with or without HA layer), (ii) the amount and the conformation of adsorbed proteins are guided by the glass micro-/nano-structure, and (iii) cell attachment and proliferation are influenced by the concentration and the conformation of attached proteins with a significantly better cell adhesion to spinodal type 45S5 Bioglass® substrate. Taken together, our results indicate that the biological performance of 45S5 Bioglass® can be improved further with a relatively simple, inexpensive fabrication procedure that provides a superior glass micro-/nano-structure. A simple modification to the fabrication procedure of classic 45S5 Bioglass® generates spinodal (A(a)) and droplet (A(b)) varieties and has a significant impact on protein adsorption (B) and cell adhesion (C).
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Affiliation(s)
- Tia J Kowal
- Department of Biological Sciences, Lehigh University, Bethlehem, PA, 18015, USA
| | - Roman Golovchak
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, 18015, USA
- Department of Physics and Astronomy, Austin Peay State University, Clarksville, TN, 37044, USA
| | - Tanuj Chokshi
- Department of Biological Sciences, Lehigh University, Bethlehem, PA, 18015, USA
| | - Joseph Harms
- Department of Physics and Astronomy, Austin Peay State University, Clarksville, TN, 37044, USA
- Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ukrit Thamma
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, 18015, USA
| | - Himanshu Jain
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, 18015, USA.
| | - Matthias M Falk
- Department of Biological Sciences, Lehigh University, Bethlehem, PA, 18015, USA.
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22
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Magyari K, Nagy-Simon T, Vulpoi A, Popescu R, Licarete E, Stefan R, Hernádi K, Papuc I, Baia L. Novel bioactive glass-AuNP composites for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:752-759. [DOI: 10.1016/j.msec.2017.03.138] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 12/30/2016] [Accepted: 03/13/2017] [Indexed: 10/19/2022]
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23
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Wang H, Akcora P. Confinement effect on the structure and elasticity of proteins interfacing polymers. SOFT MATTER 2017; 13:1561-1568. [PMID: 28127605 DOI: 10.1039/c6sm02179d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The ordered nanostructured surfaces provide confined environments that allow functionalization of proteins. Here, we used the nanopores of poly(methyl methacrylate) films to attach fibrinogen and lysozyme, and discussed the changes in proteins' structures and elasticity upon confinement. Fourier-transform infrared spectroscopic analysis of protein secondary structures reveals that fibrinogen undergoes less structural change and behaves less stiff when the pore size is close to the protein size. Lysozyme, on the other hand, retains its native-like structure, however, it exhibits the highest modulus in 15 nm pores due to the lower macromolecular crowding effect the protein faces compared to lysozyme within larger pores. These findings manifest the effect of confinement and crowding on the conformation and elasticity of different shaped proteins tethered on surfaces.
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Affiliation(s)
- Haoyu Wang
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, 1 Castle Point on Hudson, Hoboken, New Jersey 07030, USA.
| | - Pinar Akcora
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, 1 Castle Point on Hudson, Hoboken, New Jersey 07030, USA.
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24
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Helbing C, Stoeßel R, Hering DA, Arras MML, Bossert J, Jandt KD. pH-Dependent Ordered Fibrinogen Adsorption on Polyethylene Single Crystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11868-11877. [PMID: 27775351 DOI: 10.1021/acs.langmuir.6b03110] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanostructured surfaces have the potential to influence the assembly as well as the orientation of adsorbed proteins and may, thus, strongly influence the biomaterials' performance. For the class of polymeric (bio)materials a reproducible and well-characterized nanostructure is the ordered chain folded surface of a polyethylene single crystal (PE-SC). We tested the hypothesis that the trinodal-rod-shaped protein human plasma fibrinogen (HPF) adsorbs on the (001) surface of PE-SCs along specific crystallographic directions. The PE-SC samples were prepared by isothermal crystallization in dilute solution and characterized by atomic force microscopy (AFM) before as well as after HPF adsorption at different concentrations and pH values. At a physiological pH of 7.4, connected HPF molecules, or e.g., fibrils, fibril networks, or sponge-like structures, were observed on PE-SC surfaces that featured no preferential orientation. The observation of these nonoriented multiprotein assemblies was explained by predominant protein-protein interactions and limited surface diffusion. However, at an increased pH of 9.2, single HPF molecules, e.g., spherical-shaped and trinodal-rod-shaped HPF molecules as well as agglomerates, were observed on the PE-SC surface. The presence of single HPF molecules at increased pH was explained by decreased protein-protein interactions. These single trinodal-rod-shaped HPF molecules oriented preferentially along crystallographic [100] and [010] directions on the PE-SC surface which was explained by an increased amount of intermolecular bonds along these crystallographic directions with increased surface atom density. The study established that HPF molecules can align on chemically homogeneous surface topographies one order of magnitude smaller than the dimension of the protein. This advances the understanding of how to control the assembly and orientation of proteins on nanostructured polymer surfaces. Controlled protein adsorption is a crucial key to improve the surface functionality of future implants and biosensors.
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Affiliation(s)
- Christian Helbing
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena , Löbdergraben 32, 07743 Jena, Germany
| | - Robert Stoeßel
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena , Löbdergraben 32, 07743 Jena, Germany
| | - Dominik A Hering
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena , Löbdergraben 32, 07743 Jena, Germany
| | - Matthias M L Arras
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena , Löbdergraben 32, 07743 Jena, Germany
| | - Jörg Bossert
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena , Löbdergraben 32, 07743 Jena, Germany
| | - Klaus D Jandt
- Chair of Materials Science (CMS), Department of Materials Science and Technology, Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena , Löbdergraben 32, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena , Humboldtstraße 10, 07743 Jena, Germany
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25
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Magyari K, Vanea E, Baia L, Simon V. Attachment and conformational changes of collagen on bioactive glass surface. Biomed Mater Eng 2016; 27:63-74. [DOI: 10.3233/bme-161567] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- K. Magyari
- Faculty of Physics & Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
| | - E. Vanea
- Faculty of Physics & Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
| | - L. Baia
- Faculty of Physics & Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
| | - V. Simon
- Faculty of Physics & Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, 400084 Cluj-Napoca, Romania
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26
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Zhong J, Ji H, Duan J, Tu H, Zhang A. Coating morphology and surface composition of acrylic terpolymers with pendant catechol, OEG and perfluoroalkyl groups in varying ratio and the effect on protein adsorption. Colloids Surf B Biointerfaces 2016; 140:254-261. [DOI: 10.1016/j.colsurfb.2015.12.051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 12/03/2015] [Accepted: 12/27/2015] [Indexed: 12/31/2022]
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27
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Dragneva N, Rubel O, Floriano WB. Molecular Dynamics of Fibrinogen Adsorption onto Graphene, but Not onto Poly(ethylene glycol) Surface, Increases Exposure of Recognition Sites That Trigger Immune Response. J Chem Inf Model 2016; 56:706-20. [DOI: 10.1021/acs.jcim.5b00703] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nadiya Dragneva
- Thunder Bay Regional Research Institute, 290 Munro Street, Thunder Bay, Ontario P7A 7T1, Canada
- Biotechnology
Ph.D. Program, Faculty of Science and Environment Studies, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
| | - Oleg Rubel
- Thunder Bay Regional Research Institute, 290 Munro Street, Thunder Bay, Ontario P7A 7T1, Canada
- Department
of Materials Science and Engineering, McMaster University, 1280 Main
Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Wely B. Floriano
- Thunder Bay Regional Research Institute, 290 Munro Street, Thunder Bay, Ontario P7A 7T1, Canada
- Biotechnology
Ph.D. Program, Faculty of Science and Environment Studies, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
- Department
of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
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28
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Köhler S, Schmid F, Settanni G. Molecular Dynamics Simulations of the Initial Adsorption Stages of Fibrinogen on Mica and Graphite Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13180-90. [PMID: 26569042 DOI: 10.1021/acs.langmuir.5b03371] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Fibrinogen, a blood glycoprotein of vertebrates, plays an essential role in blood clotting by polymerizing into fibrin when activated. Upon adsorption on material surfaces, it also contributes to determine their biocompatibility and has been implicated in the onset of thrombosis and inflammation at medical implants. Here we present the first fully atomistic simulations of the initial stages of the adsorption process of fibrinogen on mica and graphite surfaces. The simulations reveal a weak adsorption on mica that allows frequent desorption and reorientation events. This adsorption is driven by electrostatic interactions between the protein and the silicate surface as well as the counterion layer. Preferred adsorption orientations for the globular regions of the protein are identified. The adsorption on graphite is found to be stronger with fewer reorientation and desorption events and shows the onset of denaturation of the protein.
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Affiliation(s)
- Stephan Köhler
- Institut für Physik, ‡Graduate School Materials Science in Mainz, and §Max Planck Graduate Center, Johannes Gutenberg-Universität , Mainz 55099, Germany
| | - Friederike Schmid
- Institut für Physik, ‡Graduate School Materials Science in Mainz, and §Max Planck Graduate Center, Johannes Gutenberg-Universität , Mainz 55099, Germany
| | - Giovanni Settanni
- Institut für Physik, ‡Graduate School Materials Science in Mainz, and §Max Planck Graduate Center, Johannes Gutenberg-Universität , Mainz 55099, Germany
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29
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Nattich-Rak M, Adamczyk Z, Wasilewska M, Sadowska M. Revealing fibrinogen monolayer conformations at different pHs: electrokinetic and colloid deposition studies. J Colloid Interface Sci 2015; 449:62-71. [PMID: 25453169 DOI: 10.1016/j.jcis.2014.10.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 09/30/2014] [Accepted: 10/03/2014] [Indexed: 11/26/2022]
Abstract
Adsorption mechanism of human fibrinogen on mica at different pHs is studied using the streaming potential and colloid deposition measurements. The fibrinogen monolayers are produced by a controlled adsorption under diffusion transport at pH of 3.5 and 7.4. Initially, the electrokinetic properties of these monolayers and their stability for various ionic strength are determined. It is shown that at pH 3.5 fibrinogen adsorbs irreversibly on mica for ionic strength range of 4×10(-4) to 0.15 M. At pH 7.4, a partial desorption is observed for ionic strength below 10(-2) M. This is attributed to the desorption of the end-on oriented molecules whereas the side-on adsorbed molecules remain irreversibly bound at all ionic strengths. The orientation of molecules and monolayer structure is evaluated by the colloid deposition measurements involving negatively charged polystyrene latex microspheres, 820 nm in diameter. An anomalous deposition of negative latex particles on substrates exhibiting a negative zeta potential is observed. At pH 3.5 measurable deposition of latex is observed even at low ionic strength where the approach distance of latex particles exceeded 70 nm. At pH 7.4 this critical distance is 23 nm. This confirms that fibrinogen monolayers formed at both pHs are characterized by the presence of the side-on and end-on oriented molecules that prevail at higher coverage range. It is also shown that positive charge is located at the end parts of the αA chains of the adsorbed fibrinogen molecules. Therefore, it is concluded that the colloid deposition method is an efficient tool for revealing protein adsorption mechanisms at solid/electrolyte interfaces.
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Affiliation(s)
- Małgorzata Nattich-Rak
- J. Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
| | - Zbigniew Adamczyk
- J. Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland.
| | - Monika Wasilewska
- J. Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
| | - Marta Sadowska
- J. Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Niezapominajek 8, 30-239 Cracow, Poland
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30
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Kroning A, Furchner A, Aulich D, Bittrich E, Rauch S, Uhlmann P, Eichhorn KJ, Seeber M, Luzinov I, Kilbey SM, Lokitz BS, Minko S, Hinrichs K. In Situ Infrared Ellipsometry for Protein Adsorption Studies on Ultrathin Smart Polymer Brushes in Aqueous Environment. ACS APPLIED MATERIALS & INTERFACES 2015; 7:12430-12439. [PMID: 25668395 DOI: 10.1021/am5075997] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The protein-adsorbing and -repelling properties of various smart nanometer-thin polymer brushes containing poly(N-isopropylacrylamide) and poly(acrylic acid) with high potential for biosensing and biomedical applications are studied by in situ infrared-spectroscopic ellipsometry (IRSE). IRSE is a highly sensitive nondestructive technique that allows protein adsorption on polymer brushes to be investigated in an aqueous environment as external stimuli, such as temperature and pH, are varied. These changes are relevant to conditions for regulation of protein adsorption and desorption for biotechnology, biocatalysis, and bioanalytical applications. Here brushes are used as model surfaces for controlling protein adsorption of human serum albumin and human fibrinogen. The important finding of this work is that IRSE in the in situ experiments in protein solutions can distinguish between contributions of polymer brushes and proteins. The vibrational bands of the polymers provide insights into the hydration state of the brushes, whereas the protein-specific amide bands are related to changes of the protein secondary structure.
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Affiliation(s)
- Annika Kroning
- ‡Leibniz-Institut für Analytische Wissenschaften - ISAS - e. V., Schwarzschildstraße 8, 12489 Berlin, Germany
| | - Andreas Furchner
- ‡Leibniz-Institut für Analytische Wissenschaften - ISAS - e. V., Schwarzschildstraße 8, 12489 Berlin, Germany
| | - Dennis Aulich
- ‡Leibniz-Institut für Analytische Wissenschaften - ISAS - e. V., Schwarzschildstraße 8, 12489 Berlin, Germany
| | - Eva Bittrich
- §Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Sebastian Rauch
- §Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Petra Uhlmann
- §Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Klaus-Jochen Eichhorn
- §Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Michael Seeber
- ⊥School of Materials Science and Engineering Clemson University, 161 Sirrine Hall, Clemson, South Carolina 29634-0971, United States
| | - Igor Luzinov
- ⊥School of Materials Science and Engineering Clemson University, 161 Sirrine Hall, Clemson, South Carolina 29634-0971, United States
| | - S Michael Kilbey
- ∥Departments of Chemistry and of Chemical Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bradley S Lokitz
- #Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sergiy Minko
- ∇Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Karsten Hinrichs
- ‡Leibniz-Institut für Analytische Wissenschaften - ISAS - e. V., Schwarzschildstraße 8, 12489 Berlin, Germany
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31
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Rosenfeld MA, Shchegolikhin AN, Bychkova AV, Leonova VB, Biryukova MI, Kostanova EA. Ozone-induced oxidative modification of fibrinogen: role of the D regions. Free Radic Biol Med 2014; 77:106-20. [PMID: 25224034 DOI: 10.1016/j.freeradbiomed.2014.08.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 08/02/2014] [Accepted: 08/14/2014] [Indexed: 10/24/2022]
Abstract
Native fibrinogen is a key blood plasma protein whose main function is to maintain hemostasis by virtue of producing cross-linked fibrin clots under the influence of thrombin and fibrin-stabilizing factor (FXIIIa). The aim of this study was to investigate mechanisms of impairment of both the molecular structure and the spatial organization of fibrinogen under ozone-induced oxidation. FTIR analysis showed that ozone treatment of the whole fibrinogen molecule results in the growth of hydroxyl, carbonyl, and carboxyl group content. A similar analysis of fibrinogen D and E fragments isolated from the oxidized protein also revealed transformation of distinct important functional groups. In particular, a remarkable decay of N-H groups within the peptide backbone was observed along with a lowering of the content of C-H groups belonging to either the aromatic moieties or the aliphatic chain CH2 and CH3 units. The model experiments performed showed that the rather unexpected decay of the aliphatic CH units might be caused by the action of hydroxyl radicals, these being produced in the water solution from ozone. The observed dissimilarities in the shapes of amide I bands of the fibrinogen D and E fragments before and after ozone treatment are interpreted in terms of feasible local conformational changes affecting the secondary structure of the protein. Taken as a whole, the FTIR data suggests that the terminal D fragments of fibrinogen are markedly more susceptible to the ozone-induced oxidation than the central E fragment. The data on elastic and dynamic light scattering provide evidence that, in the presence of FXIIIa, both the unoxidized and the oxidized fibrinogen molecules bind to one another in an "end-to-end" fashion to form the flexible covalently cross-linked fibrinogen homopolymers. The γ and α polypeptide chains of the oxidized fibrinogen proved to be involved in the enzymatic cross-linking more readily than those of unaffected fibrinogen. The experimental data on fibrinogen oxidation acquired in the present study, combined with our earlier findings, make it reasonable to suppose that the spatial structure of fibrinogen could be evolutionarily adapted to some reactive oxygen species actions detrimental to the protein function.
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Affiliation(s)
- Mark A Rosenfeld
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia.
| | | | - Anna V Bychkova
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Vera B Leonova
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Marina I Biryukova
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
| | - Elizaveta A Kostanova
- N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 119334 Moscow, Russia
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32
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Horasawa N, Yamashita T, Uehara S, Udagawa N. High-performance scaffolds on titanium surfaces: osteoblast differentiation and mineralization promoted by a globular fibrinogen layer through cell-autonomous BMP signaling. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 46:86-96. [PMID: 25491963 DOI: 10.1016/j.msec.2014.10.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 09/09/2014] [Accepted: 10/08/2014] [Indexed: 10/24/2022]
Abstract
Titanium has been widely used as a dental implant material. However, it takes several months for the implant body to bind with the jawbone. To develop new bioactive modification on titanium surfaces to achieve full osseointegration expeditiously, we used fibrinogen and fibronectin as bioactive scaffolds on the titanium plate, which are common extracellular matrix (ECM) proteins. We analyzed the features of the surface of ECM-modified titanium plates by atomic force microscopy and Fourier transform infrared spectrophotometry. We also evaluated the effect of ECM modification on promoting the differentiation and mineralization of osteoblasts on these surfaces. Fibrinogen had excellent adsorption on titanium surfaces even at low concentrations, due to the binding ability of fibrinogen via its RGD motif. The surface was composed of a fibrinogen monolayer, in which the ratio of β-sheets was decreased. Osteoblast proliferation on ECM-modified titanium surface was significantly promoted compared with titanium alone. Calcification on the modified surface was also accelerated. These ECM-promoting effects correlated with increased expression of bone morphogenetic proteins (BMPs) by the osteoblasts themselves and were inhibited by Noggin, a BMP inhibitor. These results suggest that the fibrinogen monolayer-modified titanium surface is recognized as bioactive scaffolds and promotes bone formation, resulting in the acceleration of osseointegration.
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Affiliation(s)
- Noriko Horasawa
- Department of Dental Materials, Matsumoto Dental University, 1780 Hiro-oka Gobara, Shiojiri, Nagano 399-0781, Japan.
| | - Teruhito Yamashita
- Institute for Oral Science, Matsumoto Dental University, 1780 Hiro-oka Gobara, Shiojiri, Nagano 399-0781, Japan
| | - Shunsuke Uehara
- Department of Biochemistry, Matsumoto Dental University, 1780 Hiro-oka Gobara, Shiojiri, Nagano 399-0781, Japan
| | - Nobuyuki Udagawa
- Department of Biochemistry, Matsumoto Dental University, 1780 Hiro-oka Gobara, Shiojiri, Nagano 399-0781, Japan
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33
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Zeliszewska P, Bratek-Skicki A, Adamczyk Z, Cieśla M. Human fibrinogen adsorption on positively charged latex particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11165-11174. [PMID: 25157934 DOI: 10.1021/la5025668] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Fibrinogen (Fb) adsorption on positively charged latex particles (average diameter of 800 nm) was studied using the microelectrophoretic and the concentration depletion methods based on AFM imaging. Monolayers on latex were adsorbed from diluted bulk solutions at pH 7.4 and an ionic strength in the range of 10(-3) to 0.15 M where fibrinogen molecules exhibited an average negative charge. The electrophoretic mobility of the latex after controlled fibrinogen adsorption was systematically measured. A monotonic decrease in the electrophoretic mobility of fibrinogen-covered latex was observed for all ionic strengths. The results of these experiments were interpreted according to the three-dimensional electrokinetic model. It was also determined using the concentration depletion method that fibrinogen adsorption was irreversible and the maximum coverage was equal to 0.6 mg m(-2) for ionic strength 10(-3) M and 1.3 mg m(-2) for ionic strength 0.15 M. The increase of the maximum coverage was confirmed by theoretical modeling based on the random sequential adsorption approach. Paradoxically, the maximum coverage of fibrinogen on positively charged latex particles was more than two times lower than the maximum coverage obtained for negative latex particles (3.2 mg m(-2)) at pH 7.4 and ionic strength of 0.15 M. This was interpreted as a result of the side-on adsorption of fibrinogen molecules with their negatively charged core attached to the positively charged latex surface. The stability and acid base properties of fibrinogen monolayers on latex were also determined in pH cycling experiments where it was observed that there were no irreversible conformational changes in the fibrinogen monolayers. Additionally, the zeta potential of monolayers was more positive than the zeta potential of fibrinogen in the bulk, which proves a heterogeneous charge distribution. These experimental data reveal a new, side-on adsorption mechanism of fibrinogen on positively charged surfaces and confirmed the decisive role of electrostatic interactions in this process.
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Affiliation(s)
- Paulina Zeliszewska
- J. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences , Niezapominajek 8, 30-239 Cracow, Poland
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34
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Vedakumari WS, Sastry TP. Physiologically clotted fibrin – Preparation and characterization for tissue engineering and drug delivery applications. Biologicals 2014; 42:277-84. [DOI: 10.1016/j.biologicals.2014.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 06/11/2014] [Accepted: 06/24/2014] [Indexed: 10/25/2022] Open
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35
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Zhao AS, Wang Z, Zhu XH, Maitz MF, Huang N. Real-Time Characterization of Fibrinogen Interaction with Modified Titanium Dioxide Film by Quartz Crystal Microbalance with Dissipation. CHINESE J CHEM PHYS 2014. [DOI: 10.1063/1674-0068/27/03/355-360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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36
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Gruian C, Boehme S, Simon S, Steinhoff HJ, Klare JP. Assembly and function of the tRNA-modifying GTPase MnmE adsorbed to surface functionalized bioactive glass. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7615-7625. [PMID: 24785159 DOI: 10.1021/am500933e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Protein adsorption onto solid surfaces is a common phenomenon in tissue engineering related applications, and considerable progress was achieved in this field. However, there are still unanswered questions or contradictory opinions concerning details of the protein's structure, conformational changes, or aggregation once adsorbed onto solid surfaces. Electron paramagnetic resonance (EPR) spectroscopy and site-directed spin labeling (SDSL) were employed in this work to investigate the conformational changes and dynamics of the tRNA-modifying dimeric protein MnmE from E. coli, an ortholog of the human GTPBP3, upon adsorption on bioactive glass mimicking the composition of the classical 45S5 Bioglass. In addition, prior to protein attachment, the bioactive glass surface was modified with the protein coupling agent glutaraldehyde. Continuous wave EPR spectra of different spin labeled MnmE mutants were recorded to assess the dynamics of the attached spin labels before and after protein adsorption. The area of the continuous wave (cw)-EPR absorption spectrum was further used to determine the amount of the attached protein. Double electron-electron resonance (DEER) experiments were conducted to measure distances between the spin labels before and after adsorption. The results revealed that the contact regions between MnmE and the bioactive glass surface are located at the G domains and at the N-terminal domains. The low modulation depths of all DEER time traces recorded for the adsorbed single MnmE mutants, corroborated with the DEER measurements performed on MnmE double mutants, show that the adsorption process leads to dissociation of the dimer and alters the tertiary structure of MnmE, thereby abolishing its functionality. However, glutaraldehyde reduces the aggressiveness of the adsorption process and improves the stability of the protein attachment.
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Affiliation(s)
- C Gruian
- Faculty of Physics and Institute of Interdisciplinary Research in Bio-Nano-Sciences, Babes-Bolyai University , Cluj-Napoca, 400084, Romania
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37
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Song S, Ravensbergen K, Alabanza A, Soldin D, Hahm JI. Distinct adsorption configurations and self-assembly characteristics of fibrinogen on chemically uniform and alternating surfaces including block copolymer nanodomains. ACS NANO 2014; 8:5257-5269. [PMID: 24708538 PMCID: PMC4046797 DOI: 10.1021/nn5013397] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 04/07/2014] [Indexed: 06/03/2023]
Abstract
Understanding protein-surface interactions is crucial to solid-state biomedical applications whose functionality is directly correlated with the precise control of the adsorption configuration, surface packing, loading density, and bioactivity of protein molecules. Because of the small dimensions and highly amphiphilic nature of proteins, investigation of protein adsorption performed on nanoscale topology can shed light on subprotein-level interaction preferences. In this study, we examine the adsorption and assembly behavior of a highly elongated protein, fibrinogen, on both chemically uniform (as-is and buffered HF-treated SiO2/Si, and homopolymers of polystyrene and poly(methyl methacrylate)) and varying (polystyrene-block-poly(methyl methacrylate)) surfaces. By focusing on high-resolution imaging of individual protein molecules whose configurations are influenced by protein-surface rather than protein-protein interactions, fibrinogen conformations characteristic to each surface are identified and statistically analyzed for structural similarities/differences in key protein domains. By exploiting block copolymer nanodomains whose repeat distance is commensurate with the length of the individual protein, we determine that fibrinogen exhibits a more neutral tendency for interaction with both polystyrene and poly(methyl methacrylate) blocks relative to the case of common globular proteins. Factors affecting fibrinogen-polymer interactions are discussed in terms of hydrophobic and electrostatic interactions. In addition, assembly and packing attributes of fibrinogen are determined at different loading conditions. Primary orientations of fibrinogen and its rearrangements with respect to the underlying diblock nanodomains associated with different surface coverage are explained by pertinent protein interaction mechanisms. On the basis of two-dimensional stacking behavior, a protein assembly model is proposed for the formation of an extended fibrinogen network on the diblock copolymer.
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38
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Magyari K, Baia L, Vulpoi A, Simon S, Popescu O, Simon V. Bioactivity evolution of the surface functionalized bioactive glasses. J Biomed Mater Res B Appl Biomater 2014; 103:261-72. [DOI: 10.1002/jbm.b.33203] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 04/04/2014] [Accepted: 04/24/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Klára Magyari
- Faculty of Physics and Institute of Interdisciplinary Research in Bio-Nano-Sciences; Babes-Bolyai University; 400084 Cluj-Napoca Romania
| | - Lucian Baia
- Faculty of Physics and Institute of Interdisciplinary Research in Bio-Nano-Sciences; Babes-Bolyai University; 400084 Cluj-Napoca Romania
| | - Adriana Vulpoi
- Faculty of Physics and Institute of Interdisciplinary Research in Bio-Nano-Sciences; Babes-Bolyai University; 400084 Cluj-Napoca Romania
| | - Simion Simon
- Faculty of Physics and Institute of Interdisciplinary Research in Bio-Nano-Sciences; Babes-Bolyai University; 400084 Cluj-Napoca Romania
| | - Octavian Popescu
- Molecular Biology Center of Institute of Interdisciplinary Research in Bio-Nano-Sciences, Babes-Bolyai University; 400271 Cluj-Napoca Romania
- Romanian Academy; Institute of Biology; 060031 Bucharest Romania
| | - Viorica Simon
- Faculty of Physics and Institute of Interdisciplinary Research in Bio-Nano-Sciences; Babes-Bolyai University; 400084 Cluj-Napoca Romania
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Kastantin M, Langdon BB, Schwartz DK. A bottom-up approach to understanding protein layer formation at solid-liquid interfaces. Adv Colloid Interface Sci 2014; 207:240-52. [PMID: 24484895 PMCID: PMC4028386 DOI: 10.1016/j.cis.2013.12.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 12/05/2013] [Accepted: 12/17/2013] [Indexed: 11/25/2022]
Abstract
A common goal across different fields (e.g. separations, biosensors, biomaterials, pharmaceuticals) is to understand how protein behavior at solid-liquid interfaces is affected by environmental conditions. Temperature, pH, ionic strength, and the chemical and physical properties of the solid surface, among many factors, can control microscopic protein dynamics (e.g. adsorption, desorption, diffusion, aggregation) that contribute to macroscopic properties like time-dependent total protein surface coverage and protein structure. These relationships are typically studied through a top-down approach in which macroscopic observations are explained using analytical models that are based upon reasonable, but not universally true, simplifying assumptions about microscopic protein dynamics. Conclusions connecting microscopic dynamics to environmental factors can be heavily biased by potentially incorrect assumptions. In contrast, more complicated models avoid several of the common assumptions but require many parameters that have overlapping effects on predictions of macroscopic, average protein properties. Consequently, these models are poorly suited for the top-down approach. Because the sophistication incorporated into these models may ultimately prove essential to understanding interfacial protein behavior, this article proposes a bottom-up approach in which direct observations of microscopic protein dynamics specify parameters in complicated models, which then generate macroscopic predictions to compare with experiment. In this framework, single-molecule tracking has proven capable of making direct measurements of microscopic protein dynamics, but must be complemented by modeling to combine and extrapolate many independent microscopic observations to the macro-scale. The bottom-up approach is expected to better connect environmental factors to macroscopic protein behavior, thereby guiding rational choices that promote desirable protein behaviors.
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Affiliation(s)
- Mark Kastantin
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States
| | - Blake B Langdon
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States.
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40
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Jain R, Calderon D, Kierski PR, Schurr MJ, Czuprynski CJ, Murphy CJ, McAnulty JF, Abbott NL. Raman spectroscopy enables noninvasive biochemical characterization and identification of the stage of healing of a wound. Anal Chem 2014; 86:3764-72. [PMID: 24559115 PMCID: PMC4004186 DOI: 10.1021/ac500513t] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 02/21/2014] [Indexed: 11/29/2022]
Abstract
Accurate and rapid assessment of the healing status of a wound in a simple and noninvasive manner would enable clinicians to diagnose wounds in real time and promptly adjust treatments to hasten the resolution of nonhealing wounds. Histologic and biochemical characterization of biopsied wound tissue, which is currently the only reliable method for wound assessment, is invasive, complex to interpret, and slow. Here we demonstrate the use of Raman microspectroscopy coupled with multivariate spectral analysis as a simple, noninvasive method to biochemically characterize healing wounds in mice and to accurately identify different phases of healing of wounds at different time-points. Raman spectra were collected from "splinted" full thickness dermal wounds in mice at 4 time-points (0, 1, 5, and 7 days) corresponding to different phases of wound healing, as verified by histopathology. Spectra were deconvolved using multivariate factor analysis (MFA) into 3 "factor score spectra" (that act as spectral signatures for different stages of healing) that were successfully correlated with spectra of prominent pure wound bed constituents (i.e., collagen, lipids, fibrin, fibronectin, etc.) using non-negative least squares (NNLS) fitting. We show that the factor loadings (weights) of spectra that belonged to wounds at different time-points provide a quantitative measure of wound healing progress in terms of key parameters such as inflammation and granulation. Wounds at similar stages of healing were characterized by clusters of loading values and slowly healing wounds among them were successfully identified as "outliers". Overall, our results demonstrate that Raman spectroscopy can be used as a noninvasive technique to provide insight into the status of normally healing and slow-to-heal wounds and that it may find use as a complementary tool for real-time, in situ biochemical characterization in wound healing studies and clinical diagnosis.
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Affiliation(s)
- Rishabh Jain
- Department of Chemical
and Biological Engineering, University of
Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Diego Calderon
- Department of Surgical Sciences, School
of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Patricia R. Kierski
- Department of Surgical Sciences, School
of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Michael J. Schurr
- Department of Surgery, School of Medicine and Public Health, University of Colorado-Denver, Denver, Colorado 80217 United States
| | - Charles J. Czuprynski
- Department
of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Christopher J. Murphy
- Department
of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, California 95616, United States
- Department
of Ophthalmology & Vision Science, School of Medicine, University of California-Davis, Davis, California 95616, United States
| | - Jonathan F. McAnulty
- Department of Surgical Sciences, School
of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Nicholas L. Abbott
- Department of Chemical
and Biological Engineering, University of
Wisconsin-Madison, Madison, Wisconsin 53706, United States
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41
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Hydroxyl density affects the interaction of fibrinogen with silica nanoparticles at physiological concentration. J Colloid Interface Sci 2014; 419:86-94. [DOI: 10.1016/j.jcis.2013.12.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/10/2013] [Accepted: 12/11/2013] [Indexed: 11/21/2022]
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42
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Rosenfeld MA, Bychkova AV, Shchegolikhin AN, Leonova VB, Biryukova MI, Kostanova EA. Ozone-induced oxidative modification of plasma fibrin-stabilizing factor. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1834:2470-9. [DOI: 10.1016/j.bbapap.2013.08.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 07/15/2013] [Accepted: 08/05/2013] [Indexed: 12/26/2022]
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43
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Nattich-Rak M, Adamczyk Z, Wasilewska M, Sadowska M. Fibrinogen monolayer characterization by colloid deposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11991-12002. [PMID: 23937531 DOI: 10.1021/la402628x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Colloid particle deposition was applied to characterize bovine and human fibrinogen (Fb) monolayers on mica produced by controlled adsorption under diffusion transport at pH 3.5. The surface concentration of Fb was determined by AFM enumeration of single molecules adsorbed over the substrate surface. The electrokinetic properties of Fb monolayers for various ionic strength were studied using the in situ streaming potential measurements. It was shown that Fb adsorbs irreversibly on mica for a broad range of ionic strength of 4 × 10(-4) to 0.15 M, NaCl. The overcharging of initially negative mica surface occurred for fibrinogen surface concentrations higher than 1400 μm(-2). The orientation of fibrinogen molecules in the monolayers was evaluated by the colloid deposition method involving negatively charged polystyrene latex microspheres, 820 nm in diameter. An anomalous deposition of negative latex particles on substrates exhibiting a negative zeta potential was observed, which contradicts the mean-field DLVO predictions. Measurable deposition was observed even at low ionic strength where the minimum approach distance of latex particles to the interface exceeds 70 nm (for 6 × 10(-4) M NaCl). This confirms that, at this pH, fibrinogen molecules adsorb end-on on mica assuming extended conformations with the positive charge located mostly in the end part of the αA chains. This agrees with previous experimental and theoretical results discussed in the literature (Santore, M. M.; Wertz Ch. F. Protein spreading kinetics at liquid-solid interfaces via an adsorption probe method. Langmuir 2005, 21, 10172-10178 (experimental); Adamczyk, Z.; Barbasz, J.; Cieśla, M.; Mechanisms of fibrinogen adsorption at solid substrates. Langmuir, 2011, 25, 6868-6878 (theoretical)). This unusual latex deposition on Fb monolayers was quantitatively interpreted in terms of the model developed in ref 55 (Jin, X.; Wang, N. H. L.; Tarjus, G.; Talbot, J. Irreversible adsorption on nonuniform surfaces: the random site model. J. Phys. Chem. 1993, 97, 4256-4258). It was concluded that the colloid deposition method is an efficient tool for revealing protein adsorption mechanisms at solid/electrolyte interfaces.
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Affiliation(s)
- Małgorzata Nattich-Rak
- Institute of Catalysis and Surface Chemistry, Polish Academy of Science , Niezapominajek 8, 30-239 Cracow, Poland
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Lee JA, Lee WK. Calcium phosphate-mediated surface modification of titanium oxide and its effects on surface potential and fibrinogen adsorption. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.01.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Wang W, Mody NA, King MR. Multiscale model of platelet translocation and collision. JOURNAL OF COMPUTATIONAL PHYSICS 2013; 244:223-235. [PMID: 23853387 PMCID: PMC3706308 DOI: 10.1016/j.jcp.2012.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The tethering of platelets on the injured vessel surface mediated by glycoprotein Ibα (GPIbα) - Von Willebrand factor (vWF) bonds, as well as the interaction between flowing platelets and adherent platelets, are two key events that take place immediately following blood vessel injury. This early-stage platelet deposition and accumulation triggers the initiation of hemostasis, a self-defensive mechanism to prevent the body from excessive blood loss. To understand and predict this complex process, one must integrate experimentally determined information on the mechanics and biochemical kinetics of participating receptors over very small time frames (1-1000 µs) and length scales (10-100 nm), to collective phenomena occurring over seconds and tens of microns. In the present study, a unique three dimensional multiscale computational model, platelet adhesive dynamics (PAD), was applied to elucidate the unique physics of (i) a non-spherical, disk-shaped platelet interacting and tethering onto the damaged vessel wall followed by (ii) collisional interactions between a flowing platelet with a downstream adherent platelet. By analyzing numerous simulations under different physiological conditions, we conclude that the platelet's unique spheroid-shape provides heterogeneous, orientation-dependent translocation (rolling) behavior which enhances cell-wall interactions. We also conclude that platelet-platelet near field interactions are critical for cell-cell communication during the initiation of microthrombi. The PAD model described here helps to identify the physical factors that control the initial stages of platelet capture during this process.
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Affiliation(s)
- Weiwei Wang
- Department of Biomedical Engineering, Cornell University, NY 14853, USA
| | - Nipa A. Mody
- Department of Biomedical Engineering, Cornell University, NY 14853, USA
| | - Michael R. King
- Department of Biomedical Engineering, Cornell University, NY 14853, USA
- Corresponding author. Address: 526 Campus Rd, 205 Weill Hall, Department of Biomedical Engineering, Cornell University, NY 14853, USA, Tel.: +1 (607) 255-9803; fax: +1 (607) 255-9803.
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Santos SG, Lamghari M, Almeida CR, Oliveira MI, Neves N, Ribeiro AC, Barbosa JN, Barros R, Maciel J, Martins MCL, Gonçalves RM, Barbosa MA. Adsorbed fibrinogen leads to improved bone regeneration and correlates with differences in the systemic immune response. Acta Biomater 2013; 9:7209-17. [PMID: 23571000 DOI: 10.1016/j.actbio.2013.04.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 03/21/2013] [Accepted: 04/02/2013] [Indexed: 12/25/2022]
Abstract
Designing new biomaterials that can modulate the inflammatory response instead of attempting just to reduce it constitutes a paradigm change in regenerative medicine. This work aimed to investigate the capacity of an immunomodulatory biomaterial to enhance bone regeneration. For that purpose we incorporated a molecule with well-established pro-inflammatory and pro-healing roles, fibrinogen, in chitosan scaffolds. Two different incorporation strategies were tested, leading to concentrations of 0.54±0.10mg fibrinogen g(-1) scaffold immediately upon adsorption (Fg-Sol), and 0.34±0.04mg fibrinogen g(-1) scaffold after washing (Fg-Ads). These materials were implanted in a critical size bone defect in rats. At two months post-implantation the extent of bone regeneration was examined by histology and the systemic immune response triggered was evaluated by determining the percentages of myeloid cells, T and B lymphocytes in the draining lymph nodes. The results obtained indicate that the fibrinogen incorporation strategy conditioned the osteogenic capacity of biomaterials. Fg-Ads scaffolds led to more bone formation, and the presence of Fg stimulated angiogenesis. Furthermore, animals implanted with Fg-Ads scaffolds showed significant increases in the percentages of B lymphocytes and myeloid cells in the draining lymph nodes, while levels of T lymphocytes were not significantly different. Finally, a significant increase in TGF-β1 was detected in the plasma of animals implanted with Fg-Ads. Taken together the results presented suggest a potential correlation between the elicited immune response and biomaterial osteogenic performance.
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Affiliation(s)
- S G Santos
- Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal.
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Li S, Yang D, Tu H, Deng H, Du D, Zhang A. Protein adsorption and cell adhesion controlled by the surface chemistry of binary perfluoroalkyl/oligo(ethylene glycol) self-assembled monolayers. J Colloid Interface Sci 2013; 402:284-90. [DOI: 10.1016/j.jcis.2013.04.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 04/03/2013] [Accepted: 04/04/2013] [Indexed: 10/26/2022]
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Cieśla M, Adamczyk Z, Barbasz J, Wasilewska M. Mechanisms of fibrinogen adsorption at solid substrates at lower pH. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:7005-7016. [PMID: 23621148 DOI: 10.1021/la4012789] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Adsorption of fibrinogen was theoretically studied using the three-dimensional random sequential adsorption (RSA) model. Fibrinogen molecule shape was approximated by the bead model considering the presence of flexible side arms. Various cases were considered inter alia, the side-on adsorption mechanisms and the simultaneous side-on/end-on adsorption mechanism. The latter mechanisms is pertinent to fibrinogen adsorption at lower pH (below isoelectric point of 5.8) where the entire molecule is positively charged. Extensive calculations enabled one to determine the jamming surface concentration (coverage) of molecules adsorbed under the side-on and end-on orientations as well as the total coverage. For the simultaneous side-on/end-on model the maximum surface concentration was 7.29 × 10(3) μm(-2) corresponding to the protein coverage of 4.12 mg m(-2) (without considering hydration). Additionally, the surface blocking functions for different adsorption regimes were determined and analytically approximated for the entire range of coverage by the interpolating polynomials. Using these blocking functions, fibrinogen adsorption kinetics for diffusion controlled transport conditions was evaluated. Comparison of these theoretical results with experimental data was made. It was demonstrated that the simultaneous side-on/end-on model properly reflects the maximum coverage of fibrinogen adsorbed on latex particles determined via the electrokinetic (electrophoretic mobility) and AFM measurements. Also, streaming potential measurements of fibrinogen adsorption kinetics on mica were successfully interpreted in terms of this model. The theoretical results derived in this work have implications for basic science providing information on mechanisms of anisotropic protein adsorption.
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Affiliation(s)
- Michał Cieśla
- J. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Kraków, Poland
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Englade-Franklin LE, Saner CK, Garno JC. Spatially selective surface platforms for binding fibrinogen prepared by particle lithography with organosilanes. Interface Focus 2013; 3:20120102. [PMID: 24427541 PMCID: PMC3638418 DOI: 10.1098/rsfs.2012.0102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
We introduce an approach based on particle lithography to prepare spatially selective surface platforms of organosilanes that are suitable for nanoscale studies of protein binding. Particle lithography was applied for patterning fibrinogen, a plasma protein that has a major role in the clotting cascade for blood coagulation and wound healing. Surface nanopatterns of mercaptosilanes were designed as sites for the attachment of fibrinogen within a protein-resistant matrix of 2-[methoxy(polyethyleneoxy)propyl] trichlorosilane (PEG-silane). Preparing site-selective surfaces was problematic in our studies, because of the self-reactive properties of PEG-organosilanes. Certain organosilanes presenting hydroxyl head groups will cross react to form mixed surface multi-layers. We developed a clever strategy with particle lithography using masks of silica mesospheres to protect small, discrete regions of the surface from cross reactions. Images acquired with atomic force microscopy (AFM) disclose that fibrinogen attached primarily to the surface areas presenting thiol head groups, which were surrounded by PEG-silane. The activity for binding anti-fibrinogen was further evaluated using ex situ AFM studies, confirming that after immobilization the fibrinogen nanopatterns retained capacity for binding immunoglobulin G. Studies with AFM provide advantages of achieving nanoscale resolution for detecting surface changes during steps of biochemical surface reactions, without requiring chemical modification of proteins or fluorescent labels.
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Affiliation(s)
| | | | - Jayne C. Garno
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
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Richter AG, Kuzmenko I. Using in situ X-ray reflectivity to study protein adsorption on hydrophilic and hydrophobic surfaces: benefits and limitations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5167-5180. [PMID: 23586436 DOI: 10.1021/la3049532] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We have employed in situ X-ray reflectivity (IXRR) to study the adsorption of a variety of proteins (lysozyme, cytochrome c, myoglobin, hemoglobin, serum albumin, and immunoglobulin G) on model hydrophilic (silicon oxide) and hydrophobic surfaces (octadecyltrichlorosilane self-assembled monolayers), evaluating this recently developed technique for its applicability in the area of biomolecular studies. We report herein the highest resolution depiction of adsorbed protein films, greatly improving on the precision of previous neutron reflectivity (NR) results and previous IXRR studies. We were able to perform complete scans in 5 min or less with the maximum momentum transfer of at least 0.52 Å(-1), allowing for some time-resolved information about the evolution of the protein film structure. The three smallest proteins (lysozyme, cytochrome c, and myoglobin) were seen to deposit as fully hydrated, nondenatured molecules onto hydrophilic surfaces, with indications of particular preferential orientations. Time evolution was observed for both lysozyme and myoglobin films. The larger proteins were not observed to deposit on the hydrophilic substrates, perhaps because of contrast limitations. On hydrophobic surfaces, all proteins were seen to denature extensively in a qualitatively similar way but with a rough trend that the larger proteins resulted in lower coverage. We have generated high-resolution electron density profiles of these denatured films, including capturing the growth of a lysozyme film. Because the solution interface of these denatured films is diffuse, IXRR cannot unambiguously determine the film extent and coverage, a drawback compared to NR. X-ray radiation damage was systematically evaluated, including the controlled exposure of protein films to high-intensity X-rays and exposure of the hydrophobic surface to X-rays before adsorption. Our analysis showed that standard measuring procedures used for XRR studies may lead to altered protein films; therefore, we used modified procedures to limit the influence of X-ray damage.
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Affiliation(s)
- Andrew G Richter
- Department of Physics and Astronomy, Valparaiso University, Valparaiso, Indiana 46383, USA.
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