1
|
Deiss-Yehiely E, Dzordzorme AE, Loiselle ME, Yonker LM, Hammond PT. Carboxylated Nanoparticle Surfaces Enhance Association with Mucoid Pseudomonas aeruginosa Biofilms. ACS APPLIED MATERIALS & INTERFACES 2024; 16:14573-14582. [PMID: 38484043 PMCID: PMC10982939 DOI: 10.1021/acsami.3c18656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 04/04/2024]
Abstract
Pseudomonas aeruginosa biofilms comprise three main polysaccharides: alginate, psl, and pel, which all imbue tolerance against exogenous antimicrobials. Nanoparticles (NPs) are an exciting new strategy to overcome the biofilm matrix for therapeutic delivery applications; however, zero existing FDA approvals for biofilm-specific NP formulations can be attributed to the complex interplay of physiochemical forces at the biofilm-NP interface. Here, we leverage a set of inducible, polysaccharide-specific, expressing isogenic P. aeruginosa mutants coupled with an assembled layer-by-layer NP (LbL NP) panel to characterize biofilm-NP interactions. When investigating these interactions using confocal microscopy, alginate-layered NPs associated more than dextran-sulfate-layered NPs with biofilms that had increased alginate production, including biofilms produced by mucoid P. aeruginosa isolates from people with cystic fibrosis. These differences were further confirmed in LbL NPs layered with polysaccharide- or hydrocarbon-based polymers with pendent carboxylate or sulfate functional groups. These data suggest carboxylated NP surfaces have enhanced interactions specifically with mucoid biofilms as compared to sulfated surfaces and lay the foundation for their inclusion as a design element for increasing biofilm-NP interactions and efficacious drug delivery.
Collapse
Affiliation(s)
- Elad Deiss-Yehiely
- Department
of Materials Science and Engineering, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
- Koch
Institute for Integrative Cancer Research, Massachusetts Institute
of Technology, Cambridge, Massachusetts 02139, United States
| | - Abigail E. Dzordzorme
- Department
of Biological Engineering, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Maggie Elizabeth Loiselle
- Mucosal
Immunology and Biology Research Center, Division of Infectious Disease, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
- Department
of Pediatrics, Division of Infectious Disease, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
| | - Lael M. Yonker
- Mucosal
Immunology and Biology Research Center, Division of Infectious Disease, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
- Department
of Pediatrics, Division of Infectious Disease, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
- Harvard
Medical School, Boston, Massachusetts 02115, United States
| | - Paula T. Hammond
- Koch
Institute for Integrative Cancer Research, Massachusetts Institute
of Technology, Cambridge, Massachusetts 02139, United States
- Institute
for Soldier Nanotechnologies, Massachusetts
Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department
of Chemical Engineering, Massachusetts Institute
of Technology, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
2
|
Say S, Suzuki M, Hashimoto Y, Kimura T, Kishida A. Investigation of anti-adhesion ability of 8-arm PEGNHS-modified porcine pericardium. Biomed Mater 2024; 19:035012. [PMID: 38422523 DOI: 10.1088/1748-605x/ad2ed3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 02/29/2024] [Indexed: 03/02/2024]
Abstract
In post-adhesion surgery, there is a clinical need for anti-adhesion membranes specifically designed for the liver, given the limited efficacy of current commercial products. To address this demand, we present a membrane suitable for liver surgery applications, fabricated through the modification of decellularized porcine pericardium with 20 KDa hexaglycerol octa (succinimidyloxyglutaryl) polyoxyethylene (8-arm PEGNHS). We also developed an optimized modification procedure to produce a high-performance anti-adhesion barrier. The modified membrane significantly inhibited fibroblast cell adherence while maintaining minimal levels of inflammation. By optimizing the modification ratio, we successfully controlled post-adhesion formation. Notably, the 8-arm PEG-modified pericardium with a molar ratio of 5 exhibited the ability to effectively prevent post-adhesion formation on the liver compared to both the control and Seprafilm®, with a low adhesion score of 0.5 out of 3.0. Histological analysis further confirmed its potential for easy separation. Furthermore, the membrane demonstrated regenerative capabilities, as evidenced by the proliferation of mesothelial cells on its surface, endowing anti-adhesion properties between the abdominal wall and liver. These findings highlight the membrane's potential as a reliable barrier for repeated liver resection procedures that require the removal of the membrane multiple times.
Collapse
Affiliation(s)
- Sreypich Say
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan
| | - Mika Suzuki
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan
| | - Yoshihide Hashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan
| | - Tsuyoshi Kimura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan
| | - Akio Kishida
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan
| |
Collapse
|
3
|
Say S, Suzuki M, Hashimoto Y, Kimura T, Kishida A. Effect of multi arm-PEG-NHS (polyethylene glycol n-hydroxysuccinimide) branching on cell adhesion to modified decellularized bovine and porcine pericardium. J Mater Chem B 2024; 12:1244-1256. [PMID: 38168715 DOI: 10.1039/d3tb01661g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Implanting physical barrier materials to separate wounds from their surroundings is a promising strategy for preventing postoperative adhesions. Herein, we develop a material that switches from an anti-adhesive surface to an adhesive surface, preventing adhesion in the early stage of transplantation and then promoting recellularization. In this study, 2-arm, 4-arm, and 8-arm poly(ethylene glycol) succinimidyl glutarate (2-, 4-, 8-arm PEG-NHS) were used to modify the surface of decellularized porcine and bovine pericardium. The number of free amines on the surface of each material significantly decreased following modification regardless of the reaction molar ratio of NH2 and NHS, the number of PEG molecule branches, and the animal species of the decellularized tissue. The structure and mechanical properties of the pericardium were maintained after modification with PEG molecules. The time taken for the PEG molecules to detach through hydrolysis of the ester bonds differed between the samples, which resulted in different cell repulsion periods. By adjusting the reaction molar ratio, the number of PEG molecule branches, and the animal species of the decellularized pericardium, the duration of cell repulsion can be controlled and is expected to provide an anti-adhesion material for a variety of surgical procedures.
Collapse
Affiliation(s)
- Sreypich Say
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan.
| | - Mika Suzuki
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan.
| | - Yoshihide Hashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan.
| | - Tsuyoshi Kimura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan.
| | - Akio Kishida
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-Ku, Tokyo 101-0062, Japan.
| |
Collapse
|
4
|
Khajeei A, Masoomzadeh S, Gholikhani T, Javadzadeh Y. The Effect of PEGylation on Drugs' Pharmacokinetic Parameters; from Absorption to Excretion. Curr Drug Deliv 2024; 21:978-992. [PMID: 37345248 DOI: 10.2174/1567201820666230621124953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/06/2023] [Accepted: 04/06/2023] [Indexed: 06/23/2023]
Abstract
Until the drugs enter humans life, they may face problems in transportation, drug delivery, and metabolism. These problems can cause reducing drug's therapeutic effect and even increase its side effects. Together, these cases can reduce the patient's compliance with the treatment and complicate the treatment process. Much work has been done to solve or at least reduce these problems. For example, using different forms of a single drug molecule (like Citalopram and Escitalopram); slight changes in the drug's molecule like Meperidine and α-Prodine, and using carriers (like Tigerase®). PEGylation is a recently presented method that can use for many targets. Poly Ethylene Glycol or PEG is a polymer that can attach to drugs by using different methods and resulting sustained release, controlled metabolism, targeted delivery, and other cases. Although they will not necessarily lead to an increase in the effect of the drug, they will lead to the improvement of the treatment process in certain ways. In this article, the team of authors has tried to collect and carefully review the best cases based on the PEGylation of drugs that can help the readers of this article.
Collapse
Affiliation(s)
- Ali Khajeei
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Salar Masoomzadeh
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tooba Gholikhani
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yousef Javadzadeh
- Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
5
|
Newman G, Leclerc A, Arditi W, Calzuola ST, Feaugas T, Roy E, Perrault CM, Porrini C, Bechelany M. Challenge of material haemocompatibility for microfluidic blood-contacting applications. Front Bioeng Biotechnol 2023; 11:1249753. [PMID: 37662438 PMCID: PMC10469978 DOI: 10.3389/fbioe.2023.1249753] [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: 06/29/2023] [Accepted: 08/07/2023] [Indexed: 09/05/2023] Open
Abstract
Biological applications of microfluidics technology is beginning to expand beyond the original focus of diagnostics, analytics and organ-on-chip devices. There is a growing interest in the development of microfluidic devices for therapeutic treatments, such as extra-corporeal haemodialysis and oxygenation. However, the great potential in this area comes with great challenges. Haemocompatibility of materials has long been a concern for blood-contacting medical devices, and microfluidic devices are no exception. The small channel size, high surface area to volume ratio and dynamic conditions integral to microchannels contribute to the blood-material interactions. This review will begin by describing features of microfluidic technology with a focus on blood-contacting applications. Material haemocompatibility will be discussed in the context of interactions with blood components, from the initial absorption of plasma proteins to the activation of cells and factors, and the contribution of these interactions to the coagulation cascade and thrombogenesis. Reference will be made to the testing requirements for medical devices in contact with blood, set out by International Standards in ISO 10993-4. Finally, we will review the techniques for improving microfluidic channel haemocompatibility through material surface modifications-including bioactive and biopassive coatings-and future directions.
Collapse
Affiliation(s)
- Gwenyth Newman
- Department of Medicine and Surgery, Università degli Studi di Milano-Bicocca, Milan, Italy
- Eden Tech, Paris, France
| | - Audrey Leclerc
- Institut Européen des Membranes, IEM, UMR 5635, Univ Montpellier, ENSCM, Centre National de la Recherche Scientifique (CNRS), Place Eugène Bataillon, Montpellier, France
- École Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, Université de Toulouse, Toulouse, France
| | - William Arditi
- Eden Tech, Paris, France
- Centrale Supélec, Gif-sur-Yvette, France
| | - Silvia Tea Calzuola
- Eden Tech, Paris, France
- UMR7648—LadHyx, Ecole Polytechnique, Palaiseau, France
| | - Thomas Feaugas
- Department of Medicine and Surgery, Università degli Studi di Milano-Bicocca, Milan, Italy
- Eden Tech, Paris, France
| | | | | | | | - Mikhael Bechelany
- Institut Européen des Membranes, IEM, UMR 5635, Univ Montpellier, ENSCM, Centre National de la Recherche Scientifique (CNRS), Place Eugène Bataillon, Montpellier, France
- Gulf University for Science and Technology (GUST), Mubarak Al-Abdullah, Kuwait
| |
Collapse
|
6
|
Le TN, Chen HY, Lam XM, Wang CC, Chang HC. Antibody-Conjugated Nanodiamonds as Dual-Functional Immunosensors for In Vitro Diagnostics. Anal Chem 2023; 95:12080-12088. [PMID: 37534668 DOI: 10.1021/acs.analchem.3c02112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Nanodiamonds (NDs) are carbon nanoparticles with a large refractive index, a high density, and exceptional chemical stability. When excited by green light, they can emit bright red fluorescence from implanted nitrogen-vacancy (NV) centers. Taking advantage of these properties, we have developed antibody-conjugated NDs as in vitro diagnostic sensors for two complementary assays: particle-enhanced turbidimetric immunoassay (PETIA) and spin-enhanced lateral flow immunoassay (SELFIA). To achieve this goal, monocrystalline diamond powders (∼100 nm in diameter) with or without NV implantation were first treated in molten KNO3 to reduce their size and shape inhomogeneity, followed by surface carboxylation in strong oxidative acids and non-covalent conjugation with antibodies in water. PETIA and SELFIA were carried out separately with a microplate reader and a magnetically modulated fluorescence analyzer. Using C-reactive protein (CRP) as the target antigen, we found that anti-CRP-conjugated NDs exhibited high colloidal stability over 1 month at 4 °C in buffer solution. The limits of detection for 3 μL of CRP sample solution were 0.06 μg/mL and 1 ng/mL with variation coefficients of less than 10 and 15% for PETIA and SELFIA, respectively. These two methods together provide a detection range of 1 ng/mL-10 μg/mL, potentially useful for clinical applications. This work represents the first practical use of rounded monocrystalline NDs as in vitro diagnostic reagents.
Collapse
Affiliation(s)
- Trong-Nghia Le
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
| | - Hsin-Yi Chen
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
| | - Xuan Mai Lam
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Chi-Chia Wang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
| | - Huan-Cheng Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Department of Chemistry, National Taiwan Normal University, Taipei 106, Taiwan
| |
Collapse
|
7
|
Huynh CM, Arribas Díez I, Thi HKL, Jensen ON, Sellergren B, Irgum K. Terminally Phosphorylated Triblock Polyethers Acting Both as Templates and Pore-Forming Agents for Surface Molecular Imprinting of Monoliths Targeting Phosphopeptides. ACS OMEGA 2023; 8:8791-8803. [PMID: 36910939 PMCID: PMC9996590 DOI: 10.1021/acsomega.3c00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
The novel process reported here described the manufacture of monolithic molecularly imprinted polymers (MIPs) using a terminally functionalized block copolymer as the imprinting template and pore-forming agent. The MIPs were prepared through a step-growth polymerization process using a melamine-formaldehyde precondensate in a biphasic solvent system. Despite having a relatively low imprinting factor, the use of MIP monolith in liquid chromatography demonstrated the ability to selectively target desired analytes. An MIP capillary column was able to separate monophosphorylated peptides from a tryptic digest of bovine serum albumin. Multivariate data analysis and modeling of the phosphorylated and nonphosphorylated peptide retention times revealed that the number of phosphorylations was the strongest retention contributor for peptide retention on the monolithic MIP capillary column.
Collapse
Affiliation(s)
- Chau Minh Huynh
- Department
of Chemistry, Umeå University, S-901 87 Umeå, Sweden
| | - Ignacio Arribas Díez
- Department
of Biochemistry & Molecular Biology and VILLUM Center for Bioanalytical
Sciences, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Hien Kim Le Thi
- Department
of Chemistry, Umeå University, S-901 87 Umeå, Sweden
| | - Ole N. Jensen
- Department
of Biochemistry & Molecular Biology and VILLUM Center for Bioanalytical
Sciences, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Börje Sellergren
- Faculty
of Health and Society, Department of Biomedical Science, Malmö University, S-205 06 Malmö, Sweden
| | - Knut Irgum
- Department
of Chemistry, Umeå University, S-901 87 Umeå, Sweden
| |
Collapse
|
8
|
Jin T, Coley CW, Alexander-Katz A. Adsorption of Biomimetic Amphiphilic Heteropolymers onto Graphene and Its Derivatives. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Tianyi Jin
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Connor W. Coley
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Alfredo Alexander-Katz
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
9
|
Griego A, Scarpa E, De Matteis V, Rizzello L. Nanoparticle delivery through the BBB in central nervous system tuberculosis. IBRAIN 2023; 9:43-62. [PMID: 37786519 PMCID: PMC10528790 DOI: 10.1002/ibra.12087] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 10/04/2023]
Abstract
Recent advances in Nanotechnology have revolutionized the production of materials for biomedical applications. Nowadays, there is a plethora of nanomaterials with potential for use towards improvement of human health. On the other hand, very little is known about how these materials interact with biological systems, especially at the nanoscale level, mainly because of the lack of specific methods to probe these interactions. In this review, we will analytically describe the journey of nanoparticles (NPs) through the brain, starting from the very first moment upon injection. We will preliminarily provide a brief overlook of the physicochemical properties of NPs. Then, we will discuss how these NPs interact with the body compartments and biological barriers, before reaching the blood-brain barrier (BBB), the last gate guarding the brain. Particular attention will be paid to the interaction with the biomolecular, the bio-mesoscopic, the (blood) cellular, and the tissue barriers, with a focus on the BBB. This will be framed in the context of brain infections, especially considering central nervous system tuberculosis (CNS-TB), which is one of the most devastating forms of human mycobacterial infections. The final aim of this review is not a collection, nor a list, of current literature data, as it provides the readers with the analytical tools and guidelines for the design of effective and rational NPs for delivery in the infected brain.
Collapse
Affiliation(s)
- Anna Griego
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
- The National Institute of Molecular Genetics (INGM)MilanItaly
| | - Edoardo Scarpa
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
- The National Institute of Molecular Genetics (INGM)MilanItaly
| | - Valeria De Matteis
- Department of Mathematics and Physics “Ennio De Giorgi”University of SalentoLecceItaly
| | - Loris Rizzello
- Department of Pharmaceutical SciencesUniversity of MilanMilanItaly
- The National Institute of Molecular Genetics (INGM)MilanItaly
| |
Collapse
|
10
|
Steinkühler J, Jacobs ML, Boyd MA, Villaseñor CG, Loverde SM, Kamat NP. PEO- b-PBD Diblock Copolymers Induce Packing Defects in Lipid/Hybrid Membranes and Improve Insertion Rates of Natively Folded Peptides. Biomacromolecules 2022; 23:4756-4765. [PMID: 36318160 PMCID: PMC9667879 DOI: 10.1021/acs.biomac.2c00936] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/10/2022] [Indexed: 11/15/2022]
Abstract
Hybrid membranes assembled from biological lipids and synthetic polymers are a promising scaffold for the reconstitution and utilization of membrane proteins. Recent observations indicate that inclusion of small fractions of polymer in lipid membranes can improve protein folding and function, but the exact structural and physical changes a given polymer sequence imparts on a membrane often remain unclear. Here, we use all-atom molecular dynamics simulations to study the structure of hybrid membranes assembled from DOPC phospholipids and PEO-b-PBD diblock copolymers. We verified our computational model using new and existing experimental data and obtained a detailed picture of the polymer conformations in the lipid membrane that we can relate to changes in membrane elastic properties. We find that inclusion of low polymer fractions induces transient packing defects into the membrane. These packing defects act as insertion sites for two model peptides, and in this way, small amounts of polymer content in lipid membranes can lead to large increases in peptide insertion rates. Additionally, we report the peptide conformational space in both pure lipid and hybrid membranes. Both membranes support similar alpha helical peptide structures, exemplifying the biocompatibility of hybrid membranes.
Collapse
Affiliation(s)
- Jan Steinkühler
- Department
of Biomedical Engineering, Northwestern
University, Evanston, Illinois60208, United States
| | - Miranda L. Jacobs
- Department
of Biomedical Engineering, Northwestern
University, Evanston, Illinois60208, United States
| | - Margrethe A. Boyd
- Department
of Biomedical Engineering, Northwestern
University, Evanston, Illinois60208, United States
| | - Citlayi G. Villaseñor
- Department
of Biomedical Engineering, Northwestern
University, Evanston, Illinois60208, United States
| | - Sharon M. Loverde
- Department
of Chemistry, College of Staten Island, The City University of New York, Staten Island, New York10314, United States
| | - Neha P. Kamat
- Department
of Biomedical Engineering, Northwestern
University, Evanston, Illinois60208, United States
- Center
for Synthetic Biology, Northwestern University, Evanston, Illinois60657, United States
| |
Collapse
|
11
|
Priyadharshana PANS, Park JY, Hong SH, Song JK. Multiresponsive Polymer Nanocomposite Liquid Crystals Having Heterogeneous Phase Transitions for Battery-Free Temperature Maintenance Indicators. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203551. [PMID: 35988135 DOI: 10.1002/smll.202203551] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Multiresponsive functional materials that respond to more than one external stimulus are promising for novel photonic, electronic, and biomedical applications. However, the design or synthesis of new multiresponsive materials is challenging. Here, this work reports a facile method to prepare a multiresponsive colloidal material by mixing a liquid-crystalline 2D nanocolloid and a functional polymer colloid. For this purpose, electrically sensitive exfoliated α-ZrP 2D nanocolloids and thermosensitive block copolymer colloids that are dispersed well in water are mixed. In the liquid-crystalline nanocomposite, nematic, antinematic, or isotropic assemblies of α-ZrP, nanoparticles can be electrically and selectively obtained by applying electric fields with different frequencies; furthermore, their rheology is thermally and reversibly controlled through thesol-gel-sol transition. The nanocomposite exhibits a solid gel phase within a predesigned gel temperature range and a liquid sol phase outside this range. These properties facilitate the design of a simple display device in which information can be electrically written and thermally stabilized or erased, and using the device, a battery-free temperature maintenance indication function is demonstrated. The proposed polymer nanocomposite method can enrich the physical properties of 2D nanocolloidal liquid crystals and create new opportunities for eco-friendly, reusable, battery-free electro-optical devices.
Collapse
Affiliation(s)
- P A N S Priyadharshana
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Jangan-Gu, Suwon, Gyeonggi-do, 16419, Korea
| | - Ju-Young Park
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Jangan-Gu, Suwon, Gyeonggi-do, 16419, Korea
| | - Seung-Ho Hong
- ICT Research and Education Foundation, Sungkyunkwan University, Jangan-Gu, Suwon, Gyeonggi-do, 16419, Korea
| | - Jang-Kun Song
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Jangan-Gu, Suwon, Gyeonggi-do, 16419, Korea
| |
Collapse
|
12
|
Solis-Gonzalez OA, Tse CCW, Smith PJ, Fairclough JPA. Study of Salting Effect of Inorganic Salts on Nano- and Giant Polymersomes. Macromol Res 2022. [DOI: 10.1007/s13233-022-0051-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
13
|
Shriky B, Mahmoudi N, Kelly A, Isreb M, Gough T. The effect of PEO homopolymers on the behaviours and structural evolution of Pluronic F127 smart hydrogels for controlled drug delivery systems. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
Del Galdo S, Chiarini M, Casieri C, Daidone I. High density water clusters observed at high concentrations of the macromolecular crowder PEG400. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
15
|
Wang ST, Zhang H, Xuan S, Nykypanchuk D, Zhang Y, Freychet G, Ocko BM, Zuckermann RN, Todorova N, Gang O. Compact Peptoid Molecular Brushes for Nanoparticle Stabilization. J Am Chem Soc 2022; 144:8138-8152. [PMID: 35452210 DOI: 10.1021/jacs.2c00743] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Controlling the interfaces and interactions of colloidal nanoparticles (NPs) via tethered molecular moieties is crucial for NP applications in engineered nanomaterials, optics, catalysis, and nanomedicine. Despite a broad range of molecular types explored, there is a need for a flexible approach to rationally vary the chemistry and structure of these interfacial molecules for controlling NP stability in diverse environments, while maintaining a small size of the NP molecular shell. Here, we demonstrate that low-molecular-weight, bifunctional comb-shaped, and sequence-defined peptoids can effectively stabilize gold NPs (AuNPs). The generality of this robust functionalization strategy was also demonstrated by coating of silver, platinum, and iron oxide NPs with designed peptoids. Each peptoid (PE) is designed with varied arrangements of a multivalent AuNP-binding domain and a solvation domain consisting of oligo-ethylene glycol (EG) branches. Among designs, a peptoid (PE5) with a diblock structure is demonstrated to provide a superior nanocolloidal stability in diverse aqueous solutions while forming a compact shell (∼1.5 nm) on the AuNP surface. We demonstrate by experiments and molecular dynamics simulations that PE5-coated AuNPs (PE5/AuNPs) are stable in select organic solvents owing to the strong PE5 (amine)-Au binding and solubility of the oligo-EG motifs. At the vapor-aqueous interface, we show that PE5/AuNPs remain stable and can self-assemble into ordered 2D lattices. The NP films exhibit strong near-field plasmonic coupling when transferred to solid substrates.
Collapse
Affiliation(s)
- Shih-Ting Wang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Brookhaven Avenue, Upton, New York 11973, United States
| | - Honghu Zhang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Brookhaven Avenue, Upton, New York 11973, United States
| | - Sunting Xuan
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Dmytro Nykypanchuk
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Brookhaven Avenue, Upton, New York 11973, United States
| | - Yugang Zhang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Brookhaven Avenue, Upton, New York 11973, United States
| | - Guillaume Freychet
- Energy Sciences Directorate/Photon Science Division, NSLS-II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Benjamin M Ocko
- Energy Sciences Directorate/Photon Science Division, NSLS-II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Ronald N Zuckermann
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Nevena Todorova
- School of Engineering, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Oleg Gang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Brookhaven Avenue, Upton, New York 11973, United States.,Department of Chemical Engineering, Columbia University, New York, New York 10027, United States.,Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
| |
Collapse
|
16
|
Rastogi H, Chowdhury PK. Correlating the Local and Global Dynamics of an Enzyme in the Crowded Milieu. J Phys Chem B 2022; 126:3208-3223. [PMID: 35442681 DOI: 10.1021/acs.jpcb.1c09759] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Enzymes are dynamic biological macromolecules, with their catalytic function(s) being largely influenced by the changes in local fluctuations of amino acid side chains as well as global structural modulations that the enzyme undergoes. Such local and global motions can be highly affected inside the crowded physiological interior of the cell. Here, we have addressed the role of dynamic structural flexibility in affecting the activation energy barrier of a flexible multidomain enzyme adenylate kinase (AK3L1, UniProtKB: Q9UIJ7). Activation energy profiles of both local (at three different sites along the polypeptide backbone) and global dynamics of the enzyme have been monitored using solvation studies on the subnanosecond time scale and tryptophan quenching studies over the temperature range of 278-323 K, respectively, under crowded conditions (Ficoll 70, Dextran 40, Dextran 70, and PEG 8). This study not only provides the site-specific mapping of dynamics but reveals that the activation energies associated with these local motions undergo a significant decrease in the presence of macromolecular crowders, providing new insights into how crowding affects internal protein dynamics. The crowded scenario also aids in enhancing the coupling between the local and global motions of the enzyme. Moreover, select portions/regions of the enzyme when taken together can well mirror the overall dynamics of the biomolecule, showing possible energy hotspots along the polypeptide backbone.
Collapse
Affiliation(s)
- Harshita Rastogi
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India 110016
| | - Pramit K Chowdhury
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India 110016
| |
Collapse
|
17
|
Dave R, Randhawa G, Kim D, Simpson M, Hoare T. Microgels and Nanogels for the Delivery of Poorly Water-Soluble Drugs. Mol Pharm 2022; 19:1704-1721. [PMID: 35319212 DOI: 10.1021/acs.molpharmaceut.1c00967] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
While microgels and nanogels are most commonly used for the delivery of hydrophilic therapeutics, the water-swollen structure, size, deformability, colloidal stability, functionality, and physicochemical tunability of microgels can also offer benefits for addressing many of the barriers of conventional vehicles for the delivery of hydrophobic therapeutics. In this review, we describe approaches for designing microgels with the potential to load and subsequently deliver hydrophobic drugs by creating compartmentalized microgels (e.g., core-shell structures), introducing hydrophobic domains in microgels, leveraging host-guest interactions, and/or applying "smart" environmentally responsive materials with switchable hydrophobicity. In particular, the challenge of promoting hydrophobic drug loading without compromising the inherent advantages of microgels as delivery vehicles and ensuring practically relevant release kinetics from such structures is highlighted, with an eye toward the practical translation of such vehicles to the clinic.
Collapse
Affiliation(s)
- Ridhdhi Dave
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Gurpreet Randhawa
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Daeun Kim
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Madeline Simpson
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Todd Hoare
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| |
Collapse
|
18
|
Abu-Dief AM, Alsehli M, Awaad A. A higher dose of PEGylated gold nanoparticles reduces the accelerated blood clearance phenomenon effect and induces spleen B lymphocytes in albino mice. Histochem Cell Biol 2022; 157:641-656. [PMID: 35157114 DOI: 10.1007/s00418-022-02086-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2022] [Indexed: 11/30/2022]
Abstract
Polyethylene glycol (PEG) is a multifunctional polymer that has many uses in medical and biological applications. Recently, PEG has been mainly used in developing nanomaterial-based drug delivery systems (DDS). PEG is characterized by its high solubility, biological inertness, and ability to escape from immune cells (stealthiness) after systemic injection. The most challenging problem for PEGylated nanomaterials is their rapid elimination from the bloodstream after repeated doses of systemic injection, called accelerated blood clearance (ABC). Therefore, in this study, the effect of PEGylated nanomaterial dose concentration on ABC induction will be investigated using quantitative, histological, and immunohistochemical analyses. A higher dose concentration (2 mg/kg) of PEGylated gold nanoparticles (PEG-coated AuNPs) reduced the ABC phenomenon when intravenously injected into mice preinjected with the same dose. In contrast, a lower dose concentration (< 1 mg/kg) significantly induced the ABC phenomenon by the rapid elimination of the second dose of PEG-coated AuNPs from the bloodstream. To explain the relationship between the dose concentration (from PEG and AuNPs) and the induction of ABC, the biodistribution of PEG-coated AuNPs in liver and spleen [reticuloendothelial systems (RES)-rich organs] was investigated. The injected dose of PEG-coated AuNPs accumulated mainly in the hepatic Kupffer cells and hepatocytes. Similarly, spleen red pulp received a higher amount of the injected dose of PEG-coated AuNPs. However, the biodistriution profiles of PEG-coated AuNPs after the first and second dose for different dose concentrations varied in RES-rich organs. Additionally, the number of B lymphocytes, which have an important role in producing anti-PEG immunoglobulin (Ig)M, was affected by the repeated dose of PEG-coated AuNPs in the spleen. Therefore, for effective nanomaterial-based DDS development, dose optimization of PEG molecules that express PEGylated nanomaterials is important to reduce the ABC phenomenon effect. The ideal concentration of PEG molecules used to coat nanomaterials and the role of RES-rich organs must be determined to control the ABC phenomenon effect of PEGylated nanomaterials.
Collapse
Affiliation(s)
- Ahmed M Abu-Dief
- Department of Chemistry, College of Science, Taibah University, P.O. Box 344, Madinah, Saudi Arabia.,Department of Chemistry, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Mosa Alsehli
- Department of Chemistry, College of Science, Taibah University, P.O. Box 344, Madinah, Saudi Arabia
| | - Aziz Awaad
- Department of Zoology, Faculty of Science, Sohag University, Sohag, 52824, Egypt.
| |
Collapse
|
19
|
Liu W, Nestorovich EM. Probing Protein Nanopores with Poly(ethylene glycol)s. Proteomics 2022; 22:e2100055. [PMID: 35030301 DOI: 10.1002/pmic.202100055] [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: 07/02/2021] [Revised: 11/16/2021] [Accepted: 01/10/2022] [Indexed: 11/08/2022]
Abstract
Neutral water-soluble poly(ethylene glycol)s (PEGs) have been extensively explored in protein nanopore research for the past several decades. The principal use of PEGs is to investigate the membrane protein ion channel physical characteristics and transport properties. In addition, protein nanopores are used to study polymer-protein interactions and polymer physicochemical properties. In this review, we focus on the biophysical studies on probing protein ion channels with PEGs, specifically on nanopore sizing by PEG partitioning. We discuss the fluctuation analysis of ion channel currents in response to the PEGs moving within their confined geometries. The advantages, limitations, and recent developments of the approach are also addressed. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Wenxing Liu
- Department of Biology, The Catholic University of America, 620 Michigan Ave, Washington, DC, 20064, USA
| | - Ekaterina M Nestorovich
- Department of Biology, The Catholic University of America, 620 Michigan Ave, Washington, DC, 20064, USA
| |
Collapse
|
20
|
Felber VB, Wester HJ. Small peptide-based GLP-1R ligands: an approach to reduce the kidney uptake of radiolabeled GLP-1R-targeting agents? EJNMMI Radiopharm Chem 2021; 6:29. [PMID: 34432147 PMCID: PMC8387526 DOI: 10.1186/s41181-021-00136-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 06/04/2021] [Indexed: 11/23/2022] Open
Abstract
Aim Elevated kidney uptake in insulinoma patients remains a major limitation of radiometallated exendin-derived ligands of the glucagon-like peptide 1 receptor (GLP-1R). Based on the previously published potent GLP-1R-activating undecapeptide 1, short-chained GLP-1R ligands were developed to investigate whether kidney uptake can be reduced by means of direct 18F-labeling (nuclide-based accelerated renal excretion) or the reduction of the overall ligand charge (ligand-based reduced kidney uptake). Materials & methods GLP-1R ligands were prepared according to optimized standard protocols via solid-phase peptide synthesis (SPPS) or, when not practicable, via fragment coupling in solution. Synthesis of (2‘-Et, 4‘-OMe)4, 4’-L-biphenylalanine ((2′-Et, 4′-OMe)BIP), required for the preparation of 1, was accomplished by Suzuki-Miyaura cross-coupling. In vitro experiments were performed using stably transfected GLP-1R+ HEK293-hGLP-1R cells. Results In contrast to the three reference ligands glucagon-like peptide 1 (GLP-1, IC50 = 23.2 ± 12.2 nM), [Nle14, Tyr(3-I)40]exendin-4 (IC50 = 7.63 ± 2.78 nM) and [Nle14, Tyr40]exendin-4 (IC50 = 9.87 ± 1.82 nM), the investigated GLP-1R-targeting small peptides (9–15 amino acids), including lead peptide 1, exhibited only medium to low affinities (IC50 > 189 nM). Only SiFA-tagged undecapeptide 5 (IC50 = 189 ± 35 nM) revealed a higher affinity than 1 (IC50 = 669 ± 242 nM). Conclusion The investigated small peptides, including lead peptide 1, could not compete with favorable in vitro characteristics of glucagon-like peptide 1 (GLP-1), [Nle14, Tyr(3-I)40]exendin-4 and [Nle14, Tyr40]exendin-4. The auspicious EC50 values of 1 provided by the literature could not be transferred to competitive binding experiments. Therefore, the use of 1 as a basic scaffold for the design of further GLP-1R-targeting radioligands cannot be recommended. Further investigations might include the scaffold of 5, although substantial optimizations concerning affinity and lipophilicity would be required. In sum, GLP-1R-targeting radioligands with reduced kidney uptake could not be obtained in this work, which emphasizes the need for further ligands addressing this particular issue. Supplementary Information The online version contains supplementary material available at 10.1186/s41181-021-00136-x.
Collapse
Affiliation(s)
- Veronika Barbara Felber
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany.
| | - Hans-Jürgen Wester
- Chair of Pharmaceutical Radiochemistry, Technical University of Munich, Walther-Meißner-Str. 3, 85748, Garching, Germany
| |
Collapse
|
21
|
Rojas G, Shiveshwarkar P, Lim B, Shrestha A, Abure I, Nelson A, Jaworski J. Modifying Polydiacetylene Vesicle Compositions to Reduce Non-Specific Interactions. Macromol Res 2021; 29:449-452. [DOI: 10.1007/s13233-021-9059-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
22
|
Morphologically Diverse Micro- and Macrostructures Created via Solvent Evaporation-Induced Assembly of Fluorescent Spherical Particles in the Presence of Polyethylene Glycol Derivatives. Molecules 2021; 26:molecules26144294. [PMID: 34299568 PMCID: PMC8304015 DOI: 10.3390/molecules26144294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 11/28/2022] Open
Abstract
The creation of fluorescent micro- and macrostructures with the desired morphologies and sizes is of considerable importance due to their intrinsic functions and performance. However, it is still challenging to modulate the morphology of fluorescent organic materials and to obtain insight into the factors governing the morphological evolution. We present a facile bottom-up approach to constructing diverse micro- and macrostructures by connecting fluorescent spherical particles (SPs), which are generated via the spherical assembly of photoisomerizable azobenzene-based propeller-shaped chromophores, only with the help of commercially available polyethylene glycol (PEG) derivatives. Without any extra additives, solvent evaporation created a slow morphological evolution of the SPs from short linear chains (with a length of a few micrometers) to larger, interconnected networks and sheet structures (ranging from tens to >100 µm) at the air–liquid interface. Their morphologies and sizes were significantly dependent on the fraction and length of the PEG. Our experimental results suggest that noncovalent interactions (such as hydrophobic forces and hydrogen bonding) between the amphiphilic PEG chains and the relatively hydrophobic SPs were weak in aqueous solutions, but play a crucial role in creating the morphologically diverse micro- and macrostructures. Moreover, short-term irradiation with visible light caused fast morphological crumpling and fluorescence switching of the obtained structures.
Collapse
|
23
|
Otero-Mato JM, Rivera-Pousa A, Montes-Campos H, Cabeza O, Heuer A, Diddens D, Varela LM. Computational study of the structure of ternary ionic liquid/salt/polymer electrolytes based on protic ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
24
|
Houbrechts M, Caire da Silva L, Ethirajan A, Landfester K. Formation of giant polymer vesicles by simple double emulsification using block copolymers as the sole surfactant. SOFT MATTER 2021; 17:4942-4948. [PMID: 34008667 DOI: 10.1039/d1sm00301a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polymer vesicles that mimic the function of cell membranes can be obtained through the self-assembly of amphiphilic block copolymers. The cell-like characteristics of polymer vesicles, such as the core-shell structure, semi-permeability and tunable surface chemistry make them excellent building blocks for artificial cells. However, the standard preparation methods for polymer vesicles can be time consuming, require special equipment, or have low encapsulation efficiency for large components, such as nanomaterials and proteins. Here, we introduce a new encapsulation strategy based on a simple double emulsification (SDE) approach which allows giant polymer vesicles to be formed in a short time and with basic laboratory equipment. The SDE method requires a single low molecular weight block copolymer that has the dual role of macromolecular surfactant and membrane building block. Giant polymer vesicles with diameters between 20-50 μm were produced, which allowed proteins and nanoparticles to be encapsulated. To demonstrate its practical application, we used the SDE method to assemble a simple artificial cell that mimics a two-step enzymatic cascade reaction. The SDE method described here introduces a new tool for simple and rapid fabrication of synthetic compartments.
Collapse
Affiliation(s)
- Mazarine Houbrechts
- Physical Chemistry of Polymers, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. and Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek, Belgium
| | - Lucas Caire da Silva
- Physical Chemistry of Polymers, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Anitha Ethirajan
- Institute for Materials Research, Hasselt University, Wetenschapspark 1, 3590 Diepenbeek, Belgium and IMEC Associated Lab IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
| | - Katharina Landfester
- Physical Chemistry of Polymers, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| |
Collapse
|
25
|
Ben-Miled A, Nabiyan A, Wondraczek K, Schacher FH, Wondraczek L. Controlling Growth of Poly (Triethylene Glycol Acrylate- Co-Spiropyran Acrylate) Copolymer Liquid Films on a Hydrophilic Surface by Light and Temperature. Polymers (Basel) 2021; 13:polym13101633. [PMID: 34069828 PMCID: PMC8157298 DOI: 10.3390/polym13101633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
A quartz crystal microbalance with dissipation monitoring (QCM-D) was employed for in situ investigations of the effect of temperature and light on the conformational changes of a poly (triethylene glycol acrylate-co-spiropyran acrylate) (P (TEGA-co-SPA)) copolymer containing 12-14% of spiropyran at the silica-water interface. By monitoring shifts in resonance frequency and in acoustic dissipation as a function of temperature and illumination conditions, we investigated the evolution of viscoelastic properties of the P (TEGA-co-SPA)-rich wetting layer growing on the sensor, from which we deduced the characteristic coil-to-globule transition temperature, corresponding to the lower critical solution temperature (LCST) of the PTEGA part. We show that the coil-to-globule transition of the adsorbed copolymer being exposed to visible or UV light shifts to lower LCST as compared to the bulk solution: the transition temperature determined acoustically on the surface is 4 to 8 K lower than the cloud point temperature reported by UV/VIS spectroscopy in aqueous solution. We attribute our findings to non-equilibrium effects caused by confinement of the copolymer chains on the surface. Thermal stimuli and light can be used to manipulate the film formation process and the film's conformational state, which affects its subsequent response behavior.
Collapse
Affiliation(s)
- Aziz Ben-Miled
- Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University Jena, D-07743 Jena, Germany;
| | - Afshin Nabiyan
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, D-07743 Jena, Germany; (A.N.); (F.H.S.)
| | - Katrin Wondraczek
- Leibniz Institute of Photonic Technology (Leibniz IPHT), D-07745 Jena, Germany;
| | - Felix H. Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, D-07743 Jena, Germany; (A.N.); (F.H.S.)
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, D-07743 Jena, Germany
| | - Lothar Wondraczek
- Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University Jena, D-07743 Jena, Germany;
- Correspondence: ; Tel.: +49-3641-9-48500
| |
Collapse
|
26
|
Thermoresponsive Pluronic based microgels for controlled release of curcumin against breast cancer cell line. Colloids Surf B Biointerfaces 2021; 205:111834. [PMID: 34015731 DOI: 10.1016/j.colsurfb.2021.111834] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 04/30/2021] [Accepted: 05/08/2021] [Indexed: 01/31/2023]
Abstract
We developed here stimuli responsive curcumin loaded microgels based on Pluronic F-127. These microgels were prepared using coupling reaction between the amine modified Pluronic and EDTA. The microgel exhibited the affinity for hydrophobic drug, curcumin and showed pH as well as temperature-dependent release. Furthermore, the cytotoxicity study demonstrated dose-dependent inhibition of MDA-MB-231 cell growth with the most effective IC50 value (3.8 ± 0.2 μg mL-1 after 24 h). Based on these findings, the fabricated curcumin loaded microgels offered additional advantages over conventional drug therapies for treatment of cancer.
Collapse
|
27
|
Tully M, Wedepohl S, Kutifa D, Weise C, Licha K, Schirner M, Haag R. Prolonged activity of exenatide: Detailed comparison of Site-specific linear polyglycerol- and poly(ethylene glycol)-conjugates. Eur J Pharm Biopharm 2021; 164:105-113. [PMID: 33957224 DOI: 10.1016/j.ejpb.2021.04.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/15/2021] [Accepted: 04/26/2021] [Indexed: 12/23/2022]
Abstract
Exenatide is a small therapeutic peptide being currently used in clinic for the treatment of diabetes mellitus type II, however, displaying a short blood circulation time which makes two daily injections necessary. Covalent polymer modification of a protein is a well-known approach to overcome this limitation, resulting in steric shielding, an increased size and therefore a longer circulation half-life. In this study, we employed site-selective C-terminal polymer ligation of exenatide via copper-catalyzed azide-alkyne-cycloaddition (CuAAC) to yield 1:1-conjugates of either poly(ethylene glycol) (PEG) or linear polyglycerol (LPG) of different molecular weights. Our goal was to compare the impact of the two polymers on size, structure and activity of exenatide on the in vitro and in vivo level. Both polymers did not alter the secondary structure of exenatide and expectedly increased its hydrodynamic size, where the LPG-versions of exenatide showed slightly smaller values than their PEG-analogs of same molecular weight. Upon conjugation, GLP-1 receptor activation was diminished, however, still enabled maximum receptor response at slightly higher concentrations. Exenatide modified with a 40 kDa LPG (Ex-40-LPG) showed significant reduction of the blood glucose level in diabetic mice for up to 72 h, which was comparable to its PEG-analog, but 9-fold longer than native exenatide (8 h).
Collapse
Affiliation(s)
- Michael Tully
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
| | - Stefanie Wedepohl
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
| | - Daniel Kutifa
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
| | - Christoph Weise
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
| | - Kai Licha
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
| | - Michael Schirner
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany
| | - Rainer Haag
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Takustr. 3, 14195 Berlin, Germany.
| |
Collapse
|
28
|
Liang ZC, Yang C, Ding X, Hedrick JL, Wang W, Yang YY. Carboxylic acid-functionalized polycarbonates as bone cement additives for enhanced and sustained release of antibiotics. J Control Release 2021; 329:871-881. [DOI: 10.1016/j.jconrel.2020.10.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 10/01/2020] [Accepted: 10/09/2020] [Indexed: 01/22/2023]
|
29
|
Xu X, Huang X, Chang Y, Yu Y, Zhao J, Isahak N, Teng J, Qiao R, Peng H, Zhao CX, Davis TP, Fu C, Whittaker AK. Antifouling Surfaces Enabled by Surface Grafting of Highly Hydrophilic Sulfoxide Polymer Brushes. Biomacromolecules 2020; 22:330-339. [PMID: 33305948 DOI: 10.1021/acs.biomac.0c01193] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Antifouling surfaces are important in a broad range of applications. An effective approach to antifouling surfaces is to covalently attach antifouling polymer brushes. This work reports the synthesis of a new class of antifouling polymer brushes based on highly hydrophilic sulfoxide polymers by surface-initiated photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization. The sulfoxide polymer brushes are able to effectively reduce nonspecific adsorption of proteins and cells, demonstrating remarkable antifouling properties. Given the outstanding antifouling behavior of the sulfoxide polymers and versatility of surface-initiated PET-RAFT technology, this work presents a useful and general approach to engineering various material surfaces with antifouling properties, for potential biomedical applications in areas such as tissue engineering, medical implants, and regenerative medicine.
Collapse
Affiliation(s)
- Xin Xu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Xumin Huang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Yixin Chang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Ye Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jiacheng Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Naatasha Isahak
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jisi Teng
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Ruirui Qiao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Hui Peng
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Chun-Xia Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Thomas P Davis
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Changkui Fu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia.,ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| |
Collapse
|
30
|
Kuttich B, Matt A, Appel C, Stühn B. X-ray scattering study on the crystalline and semi-crystalline structure of water/PEG mixtures in their eutectic phase diagram. SOFT MATTER 2020; 16:10260-10267. [PMID: 33237109 DOI: 10.1039/d0sm01601b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Mixtures of water and PEG exhibit a well known eutectic phase diagram. While the thermodynamic properties like eutectic and liquidus temperatures as well as the eutectic concentration are intensely investigated almost nothing is known about the structural properties of water and PEG in the different regions of the phase diagram. Therefore, we report on a combined DSC, SAXS and WAXS study over the full range of polymer water compositions in order to elucidate the crystalline and semi-crystalline structure. Throughout the whole phase diagram no signatures of a mixed-crystalline phase of PEG and water can be found. Below the eutectic temperature, both components demix microscopically into hexagonal ice and crystalline PEG with its well known crystalline structure. In the region between eutectic and liquidus temperature, the solid component is composed of a single phase of either pure semi-crystalline PEG (PEG rich side of the phase diagram) or pure ice (water rich side). The semi-crystalline structure of PEG, in contrast, is changed by the presence of water. Its long spacing dac increases due to the incorporation of water molecules in the amorphous regions, while the formation of crystalline regions seems to be enhanced, resulting in an almost unaffected crystallinity.
Collapse
Affiliation(s)
- Björn Kuttich
- Experimental Condensed Matter Physics, TU Darmstadt, Germany
| | | | | | | |
Collapse
|
31
|
Bunker A, Róg T. Mechanistic Understanding From Molecular Dynamics Simulation in Pharmaceutical Research 1: Drug Delivery. Front Mol Biosci 2020; 7:604770. [PMID: 33330633 PMCID: PMC7732618 DOI: 10.3389/fmolb.2020.604770] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/02/2020] [Indexed: 12/12/2022] Open
Abstract
In this review, we outline the growing role that molecular dynamics simulation is able to play as a design tool in drug delivery. We cover both the pharmaceutical and computational backgrounds, in a pedagogical fashion, as this review is designed to be equally accessible to pharmaceutical researchers interested in what this new computational tool is capable of and experts in molecular modeling who wish to pursue pharmaceutical applications as a context for their research. The field has become too broad for us to concisely describe all work that has been carried out; many comprehensive reviews on subtopics of this area are cited. We discuss the insight molecular dynamics modeling has provided in dissolution and solubility, however, the majority of the discussion is focused on nanomedicine: the development of nanoscale drug delivery vehicles. Here we focus on three areas where molecular dynamics modeling has had a particularly strong impact: (1) behavior in the bloodstream and protective polymer corona, (2) Drug loading and controlled release, and (3) Nanoparticle interaction with both model and biological membranes. We conclude with some thoughts on the role that molecular dynamics simulation can grow to play in the development of new drug delivery systems.
Collapse
Affiliation(s)
- Alex Bunker
- Division of Pharmaceutical Biosciences, Drug Research Program, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Tomasz Róg
- Department of Physics, University of Helsinki, Helsinki, Finland
| |
Collapse
|
32
|
Strzelczyk AK, Paul TJ, Schmidt S. Quantifying Thermoswitchable Carbohydrate‐Mediated Interactions via Soft Colloidal Probe Adhesion Studies. Macromol Biosci 2020; 20:e2000186. [DOI: 10.1002/mabi.202000186] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/07/2020] [Indexed: 12/30/2022]
Affiliation(s)
- Alexander Klaus Strzelczyk
- Institute of Organic and Macromolecular Chemistry Heinrich‐Heine‐University Düsseldorf Universitatsstraße 1 Dusseldorf 40225 Germany
| | - Tanja Janine Paul
- Institute of Organic and Macromolecular Chemistry Heinrich‐Heine‐University Düsseldorf Universitatsstraße 1 Dusseldorf 40225 Germany
| | - Stephan Schmidt
- Institute of Organic and Macromolecular Chemistry Heinrich‐Heine‐University Düsseldorf Universitatsstraße 1 Dusseldorf 40225 Germany
| |
Collapse
|
33
|
Disorder under stress: Role of polyol osmolytes in modulating fibrillation and aggregation of intrinsically disordered proteins. Biophys Chem 2020; 264:106422. [PMID: 32707418 DOI: 10.1016/j.bpc.2020.106422] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/19/2020] [Accepted: 06/20/2020] [Indexed: 12/18/2022]
Abstract
Intrinsically disordered proteins (IDPs) comprise ~30-40% of the proteome, have key roles in cellular processes, and have been reported to be involved in stress regulation working in synergy with osmolytes. Osmolytes are known to accumulate against various stresses in living systems and are known to stabilize the native conformation of globular proteins. However, little is known of their effect on IDPs and their mechanism of action is unclear. We have investigated the effect of a series of polyol osmolytes on the conformation, aggregation and fibrillation properties of the IDPs α and β-synuclein, involved in Parkinson's disease, using fluorescence, CD, light scattering and TEM. We observe inhibition of fibril and aggregate formation with increasing concentration as well as the number of hydroxyl groups in polyols as observed by light scattering measurements which correlates well with the increase in viscosity of solution with increasing number of OH groups in them. However, ThT assay, while indicating suppression of fibril formation at various concentrations of polyols, shows enhanced fibrillation at some other concentrations which could be due to the heterogeneity of the species formed that are ThT insensitive. Fibril formation was, thus, probed by using Nile red fluorescence which showed sensitivity towards the species formed. ANS binding fluorescence also indicates a decrease in the hydrophobicity of the fibrils with increasing number of OH groups in polyols. Polyols do not have any effect on the fibrillation of β-syn but lead to enhanced amorphous aggregate formation in presence of Ethylene Glycol and Glycerol and a reduction in the presence of Sorbitol. The net free energy of transfer of the proteins from water to Sorbitol is large and positive while it is relatively negligible in the case of Glycerol suggestive of greater preferential exclusion effect of Sorbitol in comparison with Glycerol in the case of IDPs as well. The results overall show differential and complex effect of osmolytes towards the fibrillation/aggregation properties of the two IDPs and suggest that an appropriate balance between the concentration and type of polyol or osmolyte would be required for the survival of organisms rich in IDPs under various stress conditions.
Collapse
|
34
|
Ciepluch K, Biehl R, Bryszewska M, Arabski M. Poly(propylene imine) dendrimers can bind to PEGylated albumin at PEG and albumin surface: Biophysical examination of a PEGylated platform to transport cationic dendritic nanoparticles. Biopolymers 2020; 111:e23386. [PMID: 32544981 DOI: 10.1002/bip.23386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/01/2020] [Accepted: 06/02/2020] [Indexed: 12/28/2022]
Abstract
Cationic dendrimers are considered one of the best drug transporters in the body. However, in order to improve their biocompatibility, modification of them is required to reduce toxicity. In this way, many dendrimers may lose their original properties, for example, anticancer. To improve biocompatibility of dendrimers, it is possible to complex them with albumin, as is done very often in drug delivery. However, the interaction of dendrimers with albumin can lead to protein structure disruption or no complexation at all. Therefore, the investigation of the interaction between cationic poly-(propylene imine) dendrimers and polyethylene glycol (PEG)-albumin by fluorescence, circular dichroism, small angle X-ray scattering (SAXS), and transmission electron microscopy was carried out. Results show that cationic dendrimers bind to PEGylated albumin at PEG and albumin surfaces. The obtained results for 5k-PEG indicate a preferential binding of the dendrimers to PEG. For 20k-PEG binding of dendrimers to PEG and protein could induce a collapse of the PEG chain onto the protein surface. This opens up new possibilities to the use of PEGylated albumin as a platform to carry dendrimers without changing the albumin structure and improve the pharmacokinetic properties of dendrimers without further modification.
Collapse
Affiliation(s)
- Karol Ciepluch
- Division of Medical Biology, Jan Kochanowski University, Kielce, Poland
| | - Ralf Biehl
- Jülich Centre for Neutron Science & Institute of Complex Systems (JCNS-1&ICS-1), Forschungszentrum Jülich, Jülich, Germany
| | - Maria Bryszewska
- Department of General Biophysics, University of Lodz, Lodz, Poland
| | - Michał Arabski
- Division of Medical Biology, Jan Kochanowski University, Kielce, Poland
| |
Collapse
|
35
|
Kim M, Heinrich F, Haugstad G, Yu G, Yuan G, Satija SK, Zhang W, Seo HS, Metzger JM, Azarin SM, Lodge TP, Hackel BJ, Bates FS. Spatial Distribution of PEO-PPO-PEO Block Copolymer and PEO Homopolymer in Lipid Bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3393-3403. [PMID: 32216370 PMCID: PMC8097911 DOI: 10.1021/acs.langmuir.9b03208] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Maintaining the integrity of cell membranes is indispensable for cellular viability. Poloxamer 188 (P188), a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer with a number-average molecular weight of 8700 g/mol and containing 80% by mass PEO, protects cell membranes from various external injuries and has the potential to be used as a therapeutic agent in diverse applications. The membrane protection mechanism associated with P188 is intimately connected with how this block copolymer interacts with the lipid bilayer, the main component of a cell membrane. Here, we report the distribution of P188 in a model lipid bilayer comprising 1-palmitoyl-2-oleoyl-glycero-3-phosphocholine (POPC) using neutron reflectivity (NR) and atomic force microscopy (AFM). We also investigated the association of a PEO homopolymer (PEO8.4K; Mn = 8400 g/mol) that does not protect living cell membranes. These experiments were conducted following incubation of a 4.5 mmol/L polymer solution in a buffer that mimics physiological conditions with supported POPC bilayer membranes followed by washing with the aqueous medium. In contrast to previous reports, which dealt with P188 and PEO in salt-free solutions, both P188 and PEO8.4K penetrate into the inner portion of the lipid bilayer as revealed by NR, with approximately 30% by volume occupancy across the membrane without loss of bilayer structural integrity. These results indicate that PEO is the chemical moiety that principally drives P188 binding to bilayer membranes. No defects or phase-separated domains were observed in either P188- or PEO8.4K-incubated lipid bilayers when examined by AFM, indicating that polymer chains mingle homogeneously with lipid molecules in the bilayer. Remarkably, the breakthrough force required for penetration of the AFM tip through the bilayer membrane is unaffected by the presence of the large amount of P188 and PEO8.4K.
Collapse
Affiliation(s)
- Mihee Kim
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank Heinrich
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - Greg Haugstad
- Characterization Facility, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Guichuan Yu
- Informatics Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Guangcui Yuan
- National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
- Department of Physics, Georgetown University, Washington, D.C. 20057, United States
| | - Sushil K Satija
- National Institute of Standards and Technology Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - Wenjia Zhang
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Hannah S Seo
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Joseph M Metzger
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, United States
| | - Samira M Azarin
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P Lodge
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Benjamin J Hackel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Frank S Bates
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| |
Collapse
|
36
|
Asikainen S, Seppälä J. Photo-crosslinked anhydride-modified polyester and -ethers for pH-sensitive drug release. Eur J Pharm Biopharm 2020; 150:33-42. [PMID: 32142953 DOI: 10.1016/j.ejpb.2020.02.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/31/2020] [Accepted: 02/29/2020] [Indexed: 11/17/2022]
Abstract
Photo-crosslinkable polymers have a great potential for the delivery of sensitive drugs. They allow preparation of drug releasing devices by photo-crosslinking, thus avoiding high processing temperatures. In this study, the hydrolysis behavior and drug release of three different photo-crosslinkable poly(ether anhydride)s and one poly(ester anhydride) were investigated. Three-arm poly(ethylene glycol) or polycaprolactone was reacted with succinic anhydride to obtain carboxylated macromers, and further functionalized with methacrylic anhydride to form methacrylated marcromers with anhydride linkages. The synthetized macromers were used to prepare photo-crosslinked matrices with different hydrolytic degradation times for active agent release purposes. The hydrolysis was clearly pH-sensitive: polymer networks degraded slowly in acidic conditions, and degradation rate increased as the pH shifted towards basic conditions. Drug release was studied with two water-soluble model drugs lidocaine (234 mol/g) and vitamin B12 (1355 g/mol). Vitamin B12 was released mainly due to polymer network degradation, whereas smaller molecule lidocaine was released also through diffusion and swelling of polymer network. Only a small amount of vitamin B12 was released in acidic conditions (pH 1.3 and pH 2.1). These polymers have potential in colon targeted drug delivery as the polymer could protect sensitive drugs from acidic conditions in the stomach, and the drug would be released as the conditions change closer to neutral pH in the intestine.
Collapse
Affiliation(s)
- Sanja Asikainen
- Polymer Technology, Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Finland
| | - Jukka Seppälä
- Polymer Technology, Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Finland.
| |
Collapse
|
37
|
Halami B, Eriyagama DNAM, Chillar K, Nelson Z, Prehoda L, Yin Y, Lu BY, Otto B, Haggerty L, Fang S. Linear Oligosulfoxides: Synthesis and Solubility Studies. Tetrahedron Lett 2019; 60:151306. [PMID: 31787786 PMCID: PMC6884079 DOI: 10.1016/j.tetlet.2019.151306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Synthesis of three linear oligosulfoxides containing up to six sulfoxide groups was achieved by multiple SN2 reactions between an alkanethiol and alkyl tosylate to give a linear oligosulfide followed by oxidation of the oligosulfide with sodium periodate to give an oligosulfoxide. The challenge of complete avoidance of partial oxidation and over oxidation was easily overcome using the sodium periodate oxidation conditions. Although sulfoxide is a highly polar functional group, the oligosulfoxides were found to have limited solubility in many solvents including DMSO and water, which disobeys the "like dissolves like" rule. The surprising solubility pattern of oligosulfoxides was discussed in the context of the drastically different solubility patterns of polyethylene glycol (PEG), poly(butylene oxide), and poly(methylene oxide). According to a dissolution model, solubility properties of linear oligomers including the oligosulfoxides and PEGs may be heavily affected by their conformations and the suitability of their conformations in water for maximizing attractive interactions between them and water. Based on these hypotheses, the limited solubility of the present oligosulfoxides may not imply the low solubility of similar molecules.
Collapse
Affiliation(s)
- Bhaskar Halami
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Dhananjani N A M Eriyagama
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Komal Chillar
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Zack Nelson
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Lucas Prehoda
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Yipeng Yin
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Bao-Yuan Lu
- Nalco Champion, an Ecolab Company, 11177 South Stadium Drive, Sugar Land, Texas 77478, United States
| | - Brett Otto
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Liam Haggerty
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| | - Shiyue Fang
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA
| |
Collapse
|
38
|
Munasinghe A, Mathavan A, Mathavan A, Lin P, Colina CM. PEGylation within a confined hydrophobic cavity of a protein. Phys Chem Chem Phys 2019; 21:25584-25596. [PMID: 31720639 DOI: 10.1039/c9cp04387j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The conjugation of polyethylene glycol (PEG) to proteins, known as PEGylation, has increasingly been employed to expand the efficacy of therapeutic drugs. Recently, research has emphasized the effect of the conjugation site on protein-polymer interactions. In this study, we performed atomistic molecular dynamics (MD) simulations of lysine 116 PEGylated bovine serum albumin (BSA) to illustrate how conjugation near a hydrophobic pocket affects the conjugate's dynamics and observed altered low mode vibrations in the protein. MD simulations were performed for a total of 1.5 μs for each PEG chain molecular mass from 2 to 20 kDa. Analysis of preferential PEG-BSA interactions showed that polymer behavior was also affected as proximity to the attractive protein surface patches promoted interactions in small (2 kDa) PEG chains, while the confined environment of the conjugation site reduced the expected BSA surface coverage when the polymer molecular mass increased to 10 kDa. This thorough analysis of PEG-BSA interactions and polymer dynamics increases the molecular understanding of site-specific PEGylation and enhances the use of protein-polymer conjugates as therapeutics.
Collapse
Affiliation(s)
- Aravinda Munasinghe
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA.
| | | | | | | | | |
Collapse
|
39
|
Kwan V, Malevanets A, Consta S. Where Do the Ions Reside in a Highly Charged Droplet? J Phys Chem A 2019; 123:9298-9310. [DOI: 10.1021/acs.jpca.9b03368] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Victor Kwan
- Department of Chemistry, The University of Western Ontario, London N6A 5B7, Ontario, Canada
| | - Anatoly Malevanets
- Department of Electrical and Computer Engineering, The University of Western Ontario, London N6A 5B9, Ontario, Canada
| | - Styliani Consta
- Department of Chemistry, The University of Western Ontario, London N6A 5B7, Ontario, Canada
| |
Collapse
|
40
|
Mulvihill E, Pfreundschuh M, Thoma J, Ritzmann N, Müller DJ. High-Resolution Imaging of Maltoporin LamB while Quantifying the Free-Energy Landscape and Asymmetry of Sugar Binding. NANO LETTERS 2019; 19:6442-6453. [PMID: 31385710 DOI: 10.1021/acs.nanolett.9b02674] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Maltoporins are a family of membrane proteins that facilitate the diffusion of hydrophilic molecules and maltosaccharides across the outer membrane of Gram-negative bacteria. Two contradicting models propose the sugar binding, uptake, and transport by maltoporins to be either symmetric or asymmetric. Here, we address this contradiction and introduce force-distance-based atomic force microscopy to image single maltoporin LamB trimers in the membrane at sub-nanometer resolution and simultaneously quantify the binding of different malto-oligosaccharides. We assay subtle differences of the binding free-energy landscape of maltotriose, maltotetraose, and maltopentaose, which quantifies how binding strength and affinity increase with the malto-oligosaccharide chain length. The ligand-binding parameters change considerably by mutating the extracellular loop 3, which folds into and constricts the transmembrane pore of LamB. By recording LamB topographs and structurally mapping binding events at sub-nanometer resolution, we observe LamB to preferentially bind maltodextrin from the periplasmic side, which shows sugar binding and uptake to be asymmetric. The study introduces atomic force microscopy as an analytical nanoscopic tool that can differentiate among the factors modulating and models describing the binding and uptake of substrates by membrane proteins.
Collapse
Affiliation(s)
- Estefania Mulvihill
- Department of Biosystems Science and Engineering , Eidgenössische Technische Hochschule (ETH) Zurich , Mattenstrasse 26 , 4058 Basel , Switzerland
| | - Moritz Pfreundschuh
- Department of Biosystems Science and Engineering , Eidgenössische Technische Hochschule (ETH) Zurich , Mattenstrasse 26 , 4058 Basel , Switzerland
| | - Johannes Thoma
- Department of Biosystems Science and Engineering , Eidgenössische Technische Hochschule (ETH) Zurich , Mattenstrasse 26 , 4058 Basel , Switzerland
| | - Noah Ritzmann
- Department of Biosystems Science and Engineering , Eidgenössische Technische Hochschule (ETH) Zurich , Mattenstrasse 26 , 4058 Basel , Switzerland
| | - Daniel J Müller
- Department of Biosystems Science and Engineering , Eidgenössische Technische Hochschule (ETH) Zurich , Mattenstrasse 26 , 4058 Basel , Switzerland
| |
Collapse
|
41
|
Zhong D, Wu H, Wu Y, Li Y, Xu X, Yang J, Gu Z. Rational design and facile fabrication of biocompatible triple responsive dendrimeric nanocages for targeted drug delivery. NANOSCALE 2019; 11:15091-15103. [PMID: 31385582 DOI: 10.1039/c9nr04631c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Multi-responsive polymeric nanoparticles have shown great promise in the sufficient site-specific delivery of drugs in heterogeneous and complicated biological microenvironments, but without great success due to many problems such as sophisticated manufacture process, high cost and cytotoxicity. In this work, a novel triple responsive dendrimeric nanocage (TDN) is fabricated through co-assembling and cross-linking of lipoic acid modified low generation dendrimers with lipoic acid modified polyethylene glycols (PEGs). This nanocage exhibits improved drug loading capacity (about 2 times higher) at a lower temperature and stimuli-responsive drug release profile upon the stimulation of temperature, acid pH and reducing agent. More importantly, the nanocage promotes drug internalization, conduces endosomal escape, and realizes intracellular controlled drug release. Furthermore, the nanocage significantly improves the pharmacokinetics and biodistribution of antitumor drugs, confirming the potent in vivo therapeutic effect with reduced side effects. The rational design and facile fabrication of multi-responsive dendrimeric nanocages provide a "proof-of-concept" for precise targeted drug delivery, and may have great potential for clinical use in the future.
Collapse
Affiliation(s)
- Dan Zhong
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, P.R. China.
| | | | | | | | | | | | | |
Collapse
|
42
|
Murthy NS, Wang W, Sommerfeld SD, Vaknin D, Kohn J. Temperature-Activated PEG Surface Segregation Controls the Protein Repellency of Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9769-9776. [PMID: 31257890 PMCID: PMC6686177 DOI: 10.1021/acs.langmuir.9b00702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Poly(ethylene glycol) (PEG) is widely used to modulate the hydration states of biomaterials and is often applied to produce nonfouling surfaces. Here, we present X-ray scattering data, which show that it is the surface segregation of PEG, not just its presence in the bulk, that makes this happen by influencing the hydrophilicity of PEG-containing substrates. We demonstrate a temperature-dependent trigger that transforms a PEG-containing substrate from a protein-adsorbing to a protein-repelling state. On films of poly(desaminotyrosyl-tyrosine-co-PEG carbonate) with high (20 wt %) PEG content, in which very little protein adsorption is expected, quartz crystal microbalance data showed significant adsorption of fibrinogen and bovine serum albumin at 8 °C. The surface became protein-repellent at 37.5 °C. When the same polymer was iodinated, the polymer was protein-adsorbent, even when 37 wt % PEG was incorporated into the polymer backbone. This demonstrates that high PEG content by itself is not sufficient to repel proteins. By inhibiting phase separation either with iodine or by lowering the temperature, we show that PEG must phase-separate and bloom to the surface to create an antifouling surface. These results suggest an opportunity to design materials with high PEG content that can be switched from a protein-attractant to a protein-repellent state by inducing phase separation through brief exposure to temperatures above their glass transition temperature.
Collapse
Affiliation(s)
- N Sanjeeva Murthy
- New Jersey Center for Biomaterials , Rutgers - The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - Wenjie Wang
- Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - Sven D Sommerfeld
- New Jersey Center for Biomaterials , Rutgers - The State University of New Jersey , Piscataway , New Jersey 08854 , United States
| | - David Vaknin
- Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - Joachim Kohn
- Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| |
Collapse
|
43
|
Dias RS. Role of Protein Self-Association on DNA Condensation and Nucleoid Stability in a Bacterial Cell Model. Polymers (Basel) 2019; 11:E1102. [PMID: 31261873 PMCID: PMC6680993 DOI: 10.3390/polym11071102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 01/15/2023] Open
Abstract
Bacterial cells do not have a nuclear membrane that encompasses and isolates the genetic material. In addition, they do not possess histone proteins, which are responsible for the first levels of genome condensation in eukaryotes. Instead, there is a number of more or less specific nucleoid-associated proteins that induce DNA bridging, wrapping and bending. Many of these proteins self-assemble into oligomers. The crowded environment of cells is also believed to contribute to DNA condensation due to excluded volume effects. Ribosomes are protein-RNA complexes found in large concentrations in the cytosol of cells. They are overall negatively charged and some DNA-binding proteins have been reported to also bind to ribosomes. Here the effect of protein self-association on DNA condensation and stability of DNA-protein complexes is explored using Monte Carlo simulations and a simple coarse-grained model. The DNA-binding proteins are described as positively charged dimers with the same linear charge density as the DNA, described using a bead and spring model. The crowding molecules are simply described as hard-spheres with varying charge density. It was found that applying a weak attractive potential between protein dimers leads to their association in the vicinity of the DNA (but not in its absence), which greatly enhances the condensation of the model DNA. The presence of neutral crowding agents does not affect the DNA conformation in the presence or absence of protein dimers. For weakly self-associating proteins, the presence of negatively charged crowding particles induces the dissociation of the DNA-protein complex due to the partition of the proteins between the DNA and the crowders. Protein dimers with stronger association potentials, on the other hand, stabilize the nucleoid, even in the presence of highly charged crowders. The interactions between protein dimers and crowding agents are not completely prevented and a few crowding molecules typically bind to the nucleoid.
Collapse
Affiliation(s)
- Rita S Dias
- Department of Physics, NTNU Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
| |
Collapse
|
44
|
Molecular understanding of interactions, structure, and drug encapsulation efficiency of Pluronic micelles from dissipative particle dynamics simulations. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04535-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
45
|
Postic I, Sheardown H. Altering the release of tobramycin by incorporating poly(ethylene glycol) into model silicone hydrogel contact lens materials. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:1115-1141. [DOI: 10.1080/09205063.2019.1580663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ivana Postic
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - Heather Sheardown
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada
| |
Collapse
|
46
|
Abdoli Y, Razavian M, Fatemi S. Bimetallic Ni–Co‐based metal–organic framework: An open metal site adsorbent for enhancing CO
2
capture. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yekta Abdoli
- School of Chemical Engineering, College of EngineeringUniversity of Tehran Tehran Iran
| | - Marjan Razavian
- School of Chemical Engineering, College of EngineeringUniversity of Tehran Tehran Iran
| | - Shohreh Fatemi
- School of Chemical Engineering, College of EngineeringUniversity of Tehran Tehran Iran
| |
Collapse
|
47
|
Liebrecht LK, Newton J, Martin EJ, Wickramaratne N, Jayaraman S, Han J, Aboutanos M, Brophy DF, Mangino MJ. Effects of a novel low volume resuscitation solutions on coagulation and platelet function. PLoS One 2019; 14:e0215386. [PMID: 31042735 PMCID: PMC6493729 DOI: 10.1371/journal.pone.0215386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/01/2019] [Indexed: 11/18/2022] Open
Abstract
Background Novel crystalloid solutions containing polyethylene glycol polymers (PEG-20k) produce dramatic resuscitation effects but dose-dependently produce a hypocoagulative state. The objective of this study was to examine possible mechanisms of this effect. Based on previous thromboelastography data, we hypothesize the effect is largely due to platelet interactions with the polymers. Methods Whole citrated blood from healthy volunteers was diluted ex-vivo 10% with crystalloids and tested for coagulation and platelet function. The specific tests included prothrombin time (PT), activated partial thromboplastin time (aPTT), fibrinogen and von Willebrand factor (vWf) activity, thrombin generation, thromboelastography with and without platelet mapping, platelet flow cytometry, and erythrocyte sedimentation rate. Findings Fibrinogen and vWF activities, PT, and aPTT were not affected by PEG-20k dilutions. Thrombin activity was mildly suppressed with PEG-20k (TTP- 20%). Platelet mapping demonstrated significantly greater % inhibition of both ADP and arachidonic acid-induced platelet aggregation with PEG-20k, but direct ADP-activated gpIIa/IIIb (PAC1) and P-selectin (CD62P) binding site expression was not altered. Mild dose-dependent suppression of TEG-MA was seen with PEG-20k using platelet poor plasma. Erythrocyte Sedimentation Rates (ESR) were dramatically accelerated after dilution with 10% PEG-20k, which was competitively blocked by smaller PEG polymers, suggesting nonspecific PEG-20k cell binding effects. Conclusions PEG-20k creates a mild hypocoagulative state in whole blood at concentrations ≥10%, which may be due to platelet-PEG interactions at the IIb/IIIa interface with lesser effects on fibrin polymerization. This interaction may cause a functional thrombasthenia induced by nonspecific platelet surface passivation by the PEG polymer.
Collapse
Affiliation(s)
- Loren K. Liebrecht
- Department of Surgery, Division of Acute Care Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
| | - Jason Newton
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
| | - Erika J. Martin
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University School of Pharmacy, Richmond, VA, United States of America
| | - Niluka Wickramaratne
- Department of Surgery, Division of Acute Care Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
| | - Sudha Jayaraman
- Department of Surgery, Division of Acute Care Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
| | - Jinfeng Han
- Department of Surgery, Division of Acute Care Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
| | - Michel Aboutanos
- Department of Surgery, Division of Acute Care Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
| | - Donald F. Brophy
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University School of Pharmacy, Richmond, VA, United States of America
| | - Martin J. Mangino
- Department of Surgery, Division of Acute Care Surgery, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
- Department of Emergency Medicine, Virginia Commonwealth University School of Medicine, Richmond, VA, United States of America
- * E-mail:
| |
Collapse
|
48
|
Mahmoud NN, Alhusban AA, Ali JI, Al-Bakri AG, Hamed R, Khalil EA. Preferential Accumulation of Phospholipid-PEG and Cholesterol-PEG Decorated Gold Nanorods into Human Skin Layers and Their Photothermal-Based Antibacterial Activity. Sci Rep 2019; 9:5796. [PMID: 30962476 PMCID: PMC6453979 DOI: 10.1038/s41598-019-42047-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 03/21/2019] [Indexed: 02/03/2023] Open
Abstract
Herein, a library of gold nanorods (GNR) decorated with polyethylene glycol-thiol (PEG-SH) containing different functionalities were synthesized and characterized by optical absorption spectroscopy, zeta potential, dynamic light scattering (DLS), transmission electron microscope (TEM) and proton nuclear magnetic resonance (1H-NMR). The colloidal stability of GNR when exposed to skin, and their preferential accumulation into excised human skin layers were investigated. Confocal laser scanning microscopy, transmission electron microscope (TEM) and inductively coupled plasma-optical emission spectroscopy (ICP-OES) were utilized to track the penetration of GNR into different skin layers. The results demonstrated that cholesterol-PEG coated GNR were preferentially loaded up in the upper layers of skin (stratum corneum), while phospholipid-PEG coated counterparts were drastically deposited in skin dermis. Neutral methoxy-PEG-coated GNR were distributed in both SC and dermis skin layers, while charged GNR (anionic-carboxylic acid-PEG-GNR and cationic-amine-PEG-GNR) revealed a minimal accumulation into skin. DSPE-PEG-GNR and Chol-PEG-GNR demonstrated antibacterial activities against Staphylococcus aureus (S aureus) at MIC values of 0.011 nM and 0.75 nM, respectively. Photothermal treatment for S. aureus at sub-MIC concentrations resulted in a significant bactericidal effect when using Chol-PEG-GNR but not DSPE-PEG-GNR. Gold-based nanoscale systems have great value as a promising platform for skin diseases therapy.
Collapse
Affiliation(s)
- Nouf N Mahmoud
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, 11733, Jordan.
| | - Ala A Alhusban
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, 11733, Jordan
| | - Jamila Isabilla Ali
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, 11733, Jordan
| | - Amal G Al-Bakri
- Department of Pharmaceutics & Pharmaceutical Technology, School of Pharmacy, The University of Jordan, Amman, 11942, Jordan
| | - Rania Hamed
- Department of Pharmacy, Faculty of Pharmacy, Al-Zaytoonah University of Jordan, Amman, 11733, Jordan
| | - Enam A Khalil
- Department of Pharmaceutics & Pharmaceutical Technology, School of Pharmacy, The University of Jordan, Amman, 11942, Jordan
| |
Collapse
|
49
|
PEGylation: a promising strategy to overcome challenges to cancer-targeted nanomedicines: a review of challenges to clinical transition and promising resolution. Drug Deliv Transl Res 2019; 9:721-734. [DOI: 10.1007/s13346-019-00631-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
50
|
Wang F, Zhu J, Yan T, Pei X, Zhang F, Linhardt RJ. Amphiphilic bromelain-synthesized oligo-phenylalanine grafted with methoxypolyethylene glycol possessing stabilizing thermo-responsive emulsion properties. J Colloid Interface Sci 2019; 538:1-14. [PMID: 30481653 DOI: 10.1016/j.jcis.2018.11.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/16/2018] [Accepted: 11/22/2018] [Indexed: 12/20/2022]
Abstract
A thermo-responsive amphiphile was developed from oligo-phenylalanine [oligo(Phe)]. The hydrophobic moiety of the amphiphile, oligo(Phe) was synthesized via reverse hydrolysis catalyzed by bromelain in dimethyl sulfoxide and dioxane solutions. The production of oligo(Phe) increased by 80.7% by screening suitable reaction conditions. The average degree of polymerization of oligo(Phe) was determined to be four by 1H NMR. By grafting with aldehyde-ended methoxypolyethylene glycol (mPEG), oligo(Phe) was converted to amphiphilic oligo(Phe)-mPEG. The surface tension of oligo(Phe)-mPEG solution increased with decreasing chain length of the mPEG moiety. Cytotoxicity studies showed oligo(Phe)-mPEGs are biocompatible. On varying temperature, a reversible phase transition of oligo(Phe)-mPEG solutions could be observed. N-octane-in-water emulsions and 0.5% beta-carotene containing squalene-in-water emulsions stabilized by oligo(Phe)-mPEGs occurred at 25 °C but de-emulsification took place at >40 °C. Emulsification could be restored once the separated mixture cooled and re-homogenized. The emulsification/de-emulsification cycling could be repeated many times. The time required for de-emulsification decreased with elevated temperature but increased with a reduced concentration of oligo(Phe)-mPEGs and a reduction in the chain length of the mPEG moiety.
Collapse
Affiliation(s)
- Feng Wang
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
| | - Jinwen Zhu
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Tingting Yan
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaomei Pei
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Fuming Zhang
- Department of Chemistry and Chemical Biology, Departments of Chemical and Biological Engineering, Biology and Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Robert J Linhardt
- Department of Chemistry and Chemical Biology, Departments of Chemical and Biological Engineering, Biology and Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| |
Collapse
|