51
|
Smith RJ, Fabiani T, Wang S, Ramesh S, Khan S, Santiso E, Silva FLB, Gorman C, Menegatti S. Exploring the physicochemical and morphological properties of peptide‐hybridized dendrimers (
DendriPeps
) and their aggregates. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ryan J. Smith
- Department of ChemistryNorth Carolina State University Raleigh North Carolina USA
| | - Thomas Fabiani
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University Raleigh North Carolina USA
| | - Siyao Wang
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University Raleigh North Carolina USA
| | - Srivatsan Ramesh
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University Raleigh North Carolina USA
| | - Saad Khan
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University Raleigh North Carolina USA
| | - Erik Santiso
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University Raleigh North Carolina USA
| | - Fernando Luis Barroso Silva
- Faculty of Pharmaceutical Sciences at Ribeirão PretoUniversidade de São Paulo Ribeirão Preto São Paulo Brazil
| | - Christopher Gorman
- Department of ChemistryNorth Carolina State University Raleigh North Carolina USA
| | - Stefano Menegatti
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University Raleigh North Carolina USA
- Golden Leaf Biomanufacturing Training & Education Center Raleigh North Carolina USA
| |
Collapse
|
52
|
Cooper RC, Yang H. Duplex of Polyamidoamine Dendrimer/Custom-Designed Nuclear-Localization Sequence Peptide for Enhanced Gene Delivery. Bioelectricity 2020; 2:150-157. [PMID: 32856017 DOI: 10.1089/bioe.2020.0009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background: Dendrimers are an attractive alternative to viral vectors due to the low cost of production, larger genetic insert-carrying capacity, and added control over immune- and genotoxic complications through versatile functionalization. However, their transfection rates pale in comparison to their viral counterparts, resulting in widespread research efforts in the attempt to improve transfection efficiency. Materials and Methods: In this work, we designed a synthetic diblock nuclear-localization sequence peptide (NLS) (DDDDDDVKRKKKP) and complexed it with polyamidoamine (PAMAM) dendrimer G4 to form a duplex for gene delivery. We conducted transmission electron microscopy, gel mobility shift assay, and intracellular trafficking studies. We also assessed its transfection efficiency for the delivery of a green fluorescent protein-encoding plasmid (pGFP) to NIH3T3 cells. Results: PAMAM dendrimer G4, NLS, and plasmid DNA can form a stable three-part polyplex and gain enhanced entry into the nucleus. We found transfection efficiency, in large part, depends on the ratio of G4:NLS:plasmid. The triplex prepared at the ratio of 1:60:1 for G4:NLS:pGFP has been shown to be more significantly efficient in transfecting cells than the control group (G4/pGFP, 0.5:1). Conclusions: This new diblock NLS peptide can facilely complex with dendrimers to improve dendrimer-based gene transfection. It can also complex with other polycationic polymers to produce more potent nonviral duplex gene delivery vehicles.
Collapse
Affiliation(s)
- Remy C Cooper
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Hu Yang
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia, USA.,Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia, USA.,Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia, USA
| |
Collapse
|
53
|
Morawiak M, Stolarska M, Cieślak M, Urbanczyk‐Lipkowska Z. Interactions of rationally designed small peptide dendrons functionalized with valine or sinapic acid with α‐helix and β‐sheet structures of poly‐
l
‐lysine and poly‐
l
‐glutamic acid. Pept Sci (Hoboken) 2020. [DOI: 10.1002/pep2.24155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Maja Morawiak
- Institute of Organic Chemistry Polish Academy of Sciences Warsaw Poland
| | | | - Maciej Cieślak
- Institute of Organic Chemistry Polish Academy of Sciences Warsaw Poland
| | | |
Collapse
|
54
|
Soddu L, Trinh DN, Dunne E, Kenny D, Bernardini G, Kokalari I, Marucco A, Monopoli MP, Fenoglio I. Identification of physicochemical properties that modulate nanoparticle aggregation in blood. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2020; 11:550-567. [PMID: 32280579 PMCID: PMC7136551 DOI: 10.3762/bjnano.11.44] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 02/28/2020] [Indexed: 05/05/2023]
Abstract
Inorganic materials are receiving significant interest in medicine given their usefulness for therapeutic applications such as targeted drug delivery, active pharmaceutical carriers and medical imaging. However, poor knowledge of the side effects related to their use is an obstacle to clinical translation. For the development of molecular drugs, the concept of safe-by-design has become an efficient pharmaceutical strategy with the aim of reducing costs, which can also accelerate the translation into the market. In the case of materials, the application these approaches is hampered by poor knowledge of how the physical and chemical properties of the material trigger the biological response. Hemocompatibility is a crucial aspect to take into consideration for those materials that are intended for medical applications. The formation of nanoparticle agglomerates can cause severe side effects that may induce occlusion of blood vessels and thrombotic events. Additionally, nanoparticles can interfere with the coagulation cascade causing both pro- and anti-coagulant properties. There is contrasting evidence on how the physicochemical properties of the material modulate these effects. In this work, we developed two sets of tailored carbon and silica nanoparticles with three different diameters in the 100-500 nm range with the purpose of investigating the role of surface curvature and chemistry on platelet aggregation, activation and adhesion. Substantial differences were found in the composition of the protein corona depending on the chemical nature of the nanoparticles, while the surface curvature was found to play a minor role. On the other hand, large carbon nanoparticles (but not small carbon nanoparticles or silica nanoparticles) have a clear tendency to form aggregates both in plasma and blood. This effect was observed both in the presence or absence of platelets and was independent of platelet activation. Overall, the results presented herein suggest the existence of independent modes of action that are differently affected by the physicochemical properties of the materials, potentially leading to vessel occlusion and/or formation of thrombi in vivo.
Collapse
Affiliation(s)
- Ludovica Soddu
- Department of Chemistry, University of Torino, 10125 Torino, Italy
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Duong N Trinh
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Eimear Dunne
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Dermot Kenny
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Giorgia Bernardini
- Department of Chemistry, University of Torino, 10125 Torino, Italy
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Ida Kokalari
- Department of Chemistry, University of Torino, 10125 Torino, Italy
| | - Arianna Marucco
- Department of Chemistry, University of Torino, 10125 Torino, Italy
| | - Marco P Monopoli
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen Green, Dublin 2, Ireland
| | - Ivana Fenoglio
- Department of Chemistry, University of Torino, 10125 Torino, Italy
| |
Collapse
|
55
|
Influence cationic and anionic PAMAM dendrimers of low generation on selected hemostatic parameters in vitro. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 109:110605. [PMID: 32228918 DOI: 10.1016/j.msec.2019.110605] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 12/19/2019] [Accepted: 12/26/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Polyamidoamine (PAMAM) dendrimers are a new class of monodisperse polymers that are used for drug delivery in systemic administrations. The influence of PAMAM dendrimers on components of the blood coagulation system has been extensively studied, but their effect on the activity of the fibrinolysis system has not been studied to date. METHODS The effect of cationic (G1-G3) and anionic (G1.5-G3.5) PAMAM dendrimers on the conformation and function of the main components of the coagulation and fibrinolysis systems was comparatively studied. Changes in overall plasma hemostatic potential, thrombin generation, prothrombin time, thrombin and tPA activities, the fluorescence of fibrinogen and plasminogen, zeta potential, polymerization of fibrinogen, and activation of plasminogen were analyzed to assess coagulofibrinolytic mechanisms of influence of the charge of the dendrimers. RESULTS Cationic dendrimers increased prothrombin time, suppressed thrombin generation in plasma, and changed the conformation and coagulability of fibrinogen, while anionic dendrimers did not have such effects. Anionic dendrimers slightly reduced tPA activity and altered plasminogen conformation much more strongly than the cationic dendrimers. Plasminogen activation by tPA was strongly inhibited by anionic dendrimers and weakly stimulated by cationic dendrimers. All these effects were enhanced with increasing generation and concentration of the dendrimers. CONCLUSIONS PAMAM-NH2 dendrimers inhibit the extrinsic activation pathway of the coagulation system and alter the conformation and function of fibrinogen. PAMAM-COOH dendrimers change the conformation of plasminogen and inhibit its activation by tPA. This study gives new insight into the effect of anionic PAMAM dendrimers on the activity of the fibrinolytic system. For intravenous applications, the antifibrinolytic effect of anionic PAMAM dendrimers of generation ≥G2.5 should be considered.
Collapse
|
56
|
Filimon A, Dobos AM, Musteata V. New perspectives on development of polysulfones/cellulose derivatives based ionic-exchange membranes: Dielectric response and hemocompatibility study. Carbohydr Polym 2019; 226:115300. [PMID: 31582061 DOI: 10.1016/j.carbpol.2019.115300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/04/2019] [Accepted: 09/05/2019] [Indexed: 11/25/2022]
Abstract
Due to the increasing need from the membrane technologies for diverse applications, development of new generation of materials with electroactive properties and significant impact on the future technological systems was imposed. An innovative way of designing the membrane materials with long-term stable hydrophilicity, enhanced workability, porosity, and good biocompatibility, has been adopted by blending of quaternized polysulfone (PSFQ) with a cellulose derivative (cellulose acetate phthalate, CAP). Moreover, the quaternization effect has significantly improved the electrical performances, in terms of the ionic conductivity, electron interactions, and dielectric properties, required by target applications, i.e., ionic-exchange membranes, IEMs. Results derived from dielectric spectroscopy confirm the enhanced dielectric quality, reflected by a low dielectric constant and dielectric loss at high frequency. Additionally, the relationship between the resulted dielectric properties and response at the blood-biomaterial interface, have confirmed their excellent performance, constituting the preliminary basis for future tests concerning their functionality as IEMs in hemodialysis.
Collapse
Affiliation(s)
- Anca Filimon
- Department of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania.
| | - Adina Maria Dobos
- Department of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Valentina Musteata
- Laboratory of Polymer Materials Physics, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| |
Collapse
|
57
|
Hajipour MJ, Mehrani M, Abbasi SH, Amin A, Kassaian SE, Garbern JC, Caracciolo G, Zanganeh S, Chitsazan M, Aghaverdi H, Shahri SMK, Ashkarran A, Raoufi M, Bauser-Heaton H, Zhang J, Muehlschlegel JD, Moore A, Lee RT, Wu JC, Serpooshan V, Mahmoudi M. Nanoscale Technologies for Prevention and Treatment of Heart Failure: Challenges and Opportunities. Chem Rev 2019; 119:11352-11390. [PMID: 31490059 PMCID: PMC7003249 DOI: 10.1021/acs.chemrev.8b00323] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The adult myocardium has a limited regenerative capacity following heart injury, and the lost cells are primarily replaced by fibrotic scar tissue. Suboptimal efficiency of current clinical therapies to resurrect the infarcted heart results in injured heart enlargement and remodeling to maintain its physiological functions. These remodeling processes ultimately leads to ischemic cardiomyopathy and heart failure (HF). Recent therapeutic approaches (e.g., regenerative and nanomedicine) have shown promise to prevent HF postmyocardial infarction in animal models. However, these preclinical, clinical, and technological advancements have yet to yield substantial enhancements in the survival rate and quality of life of patients with severe ischemic injuries. This could be attributed largely to the considerable gap in knowledge between clinicians and nanobioengineers. Development of highly effective cardiac regenerative therapies requires connecting and coordinating multiple fields, including cardiology, cellular and molecular biology, biochemistry and chemistry, and mechanical and materials sciences, among others. This review is particularly intended to bridge the knowledge gap between cardiologists and regenerative nanomedicine experts. Establishing this multidisciplinary knowledge base may help pave the way for developing novel, safer, and more effective approaches that will enable the medical community to reduce morbidity and mortality in HF patients.
Collapse
Affiliation(s)
| | - Mehdi Mehrani
- Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Ahmad Amin
- Rajaie Cardiovascular, Medical and Research Center, Iran University of Medical Science Tehran, Iran
| | | | - Jessica C. Garbern
- Department of Stem Cell and Regenerative Biology, Harvard University, Harvard Stem Cell Institute, Cambridge, Massachusetts, United States
- Department of Cardiology, Boston Children’s Hospital, Boston, Massachusetts, United States
| | - Giulio Caracciolo
- Department of Molecular Medicine, Sapienza University of Rome, V.le Regina Elena 291, 00161, Rome, Italy
| | - Steven Zanganeh
- Department of Radiology, Memorial Sloan Kettering, New York, NY 10065, United States
| | - Mitra Chitsazan
- Rajaie Cardiovascular, Medical and Research Center, Iran University of Medical Science Tehran, Iran
| | - Haniyeh Aghaverdi
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Seyed Mehdi Kamali Shahri
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Aliakbar Ashkarran
- Precision Health Program, Michigan State University, East Lansing, MI, United States
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Mohammad Raoufi
- Physical Chemistry I, Department of Chemistry and Biology & Research Center of Micro and Nanochemistry and Engineering, University of Siegen, Siegen, Germany
| | - Holly Bauser-Heaton
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Jianyi Zhang
- Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, Alabama, United States
| | - Jochen D. Muehlschlegel
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Anna Moore
- Precision Health Program, Michigan State University, East Lansing, MI, United States
| | - Richard T. Lee
- Department of Stem Cell and Regenerative Biology, Harvard University, Harvard Stem Cell Institute, Cambridge, Massachusetts, United States
- Department of Medicine, Division of Cardiology, Brigham and Women’s Hospital and Harvard Medical School, Cambridge, Massachusetts, United States
| | - Joseph C. Wu
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California, United States
- Department of Medicine, Division of Cardiology, Stanford University School of Medicine, Stanford, California, United States
- Institute of Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California, United States
| | - Vahid Serpooshan
- Department of Biomedical Engineering, Georgia Institute of Technology & Emory University School of Medicine, Atlanta, Georgia, United States
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, United States
| | - Morteza Mahmoudi
- Precision Health Program, Michigan State University, East Lansing, MI, United States
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
- Connors Center for Women’s Health & Gender Biology, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts, United States
| |
Collapse
|
58
|
Hajtuch J, Hante N, Tomczyk E, Wojcik M, Radomski MW, Santos-Martinez MJ, Inkielewicz-Stepniak I. Effects of functionalized silver nanoparticles on aggregation of human blood platelets. Int J Nanomedicine 2019; 14:7399-7417. [PMID: 31571858 PMCID: PMC6750026 DOI: 10.2147/ijn.s213499] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 08/07/2019] [Indexed: 12/19/2022] Open
Abstract
PURPOSE We studied the effects of silver nanoparticles (AgNPs) on human blood platelet function. We hypothesized that AgNPs, a known antimicrobial agent, can be used as blood-compatible, "ideal material'' in medical devices or as a drug delivery system. Therefore, the aim of the current study was to investigate if functionalized AgNPs affect platelet function and platelets as well as endothelial cell viability in vitro. METHODS AgNPs, functionalized with reduced glutathione (GSH), polyethylene glycol (PEG) and lipoic acid (LA) were synthesized. Quartz crystal microbalance with dissipation was used to measure the effect of AgNPs on platelet aggregation. Platelet aggregation was measured by changes in frequency and dissipation, and the presence of platelets on the sensor surface was confirmed and imaged by phase contrast microscopy. Flow cytometry was used to detect surface abundance of platelet receptors. Lactate dehydrogenase test was used to assess the potential cytotoxicity of AgNPs on human blood platelets, endothelial cells, and fibroblasts. Commercially available ELISA tests were used to measure the levels of thromboxane B2 and metalloproteinases (MMP-1, MMP-2) released by platelets as markers of platelet activation. RESULTS 2 nm AgNPs-GSH, 3.7 nm AgNPs-PEG both at 50 and 100 µg/mL, and 2.5 nm AgNPs-LA at 100 µg/mL reduced platelet aggregation, inhibited collagen-mediated increase in total P-selectin and GPIIb/IIIa, TXB2 formation, MMP-1, and MMP-2 release. The tested AgNPs concentrations were not cytotoxic as they did not affect, platelet, endothelial cell, or fibroblast viability. CONCLUSION All tested functionalized AgNPs inhibited platelet aggregation at nontoxic concentrations. Therefore, functionalized AgNPs can be used as an antiplatelet agent or in design and manufacturing of blood-facing medical devices, such as vascular grafts, stents, heart valves, and catheters.
Collapse
Affiliation(s)
- Justyna Hajtuch
- Department of Medical Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - Nadhim Hante
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin2, Ireland
| | | | - Michal Wojcik
- Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | - Marek Witold Radomski
- Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, Canada
| | | | | |
Collapse
|
59
|
Yellepeddi VK, Ghandehari H. Pharmacokinetics of oral therapeutics delivered by dendrimer-based carriers. Expert Opin Drug Deliv 2019; 16:1051-1061. [DOI: 10.1080/17425247.2019.1656607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Venkata K. Yellepeddi
- Division of Clinical Pharmacology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
| | - Hamidreza Ghandehari
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, USA
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
- Department of Bioengineering, University of Utah, Salt Lake City, UT, USA
| |
Collapse
|
60
|
Ayat NR, Sun Z, Sun D, Yin M, Hall RC, Vaidya AM, Liu X, Schilb AL, Scheidt JH, Lu ZR. Formulation of Biocompatible Targeted ECO/siRNA Nanoparticles with Long-Term Stability for Clinical Translation of RNAi. Nucleic Acid Ther 2019; 29:195-207. [PMID: 31140918 PMCID: PMC6686697 DOI: 10.1089/nat.2019.0784] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 03/29/2019] [Indexed: 12/22/2022] Open
Abstract
Nanoparticle based siRNA formulations often suffer from aggregation and loss of function during storage. We in this study report a frozen targeted RGD-polyethylene glycol (PEG)-ECO/siβ3 nanoparticle formulation with a prolonged shelf life and preserved nanoparticle functionality. The targeted RGD-PEG-ECO/siβ3 nanoparticles are formed by step-wised self-assembly of RGD-PEG-maleimide, ECO, and siRNA. The nanoparticles have a diameter of 224.5 ± 9.41 nm and a zeta potential to 45.96 ± 3.67 mV in water and a size of 234.34 ± 3.01 nm and a near neutral zeta potential in saline solution. The addition of sucrose does not affect their size and zeta potential and substantially preserves the integrity and biological activities of frozen and lyophilized formulations of the targeted nanoparticles. The frozen formulation with as low as 5% sucrose retains nanoparticle integrity (90% siRNA encapsulation), size distribution (polydispersity index [PDI] ≤20%), and functionality (at least 75% silencing efficiency) at -80°C for at least 1 year. The frozen RGD-PEG-ECO/siβ3 nanoparticle formulation exhibits excellent biocompatibility, with no adverse effects on hemocompatibility and minimal immunogenicity. As RNAi holds the promise in treating the previously untreatable diseases, the frozen nanoparticle formulation with the low sucrose concentration has the potential to be a delivery platform for clinical translation of RNAi therapeutics.
Collapse
Affiliation(s)
- Nadia R. Ayat
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Zhanhu Sun
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Da Sun
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Michelle Yin
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Ryan C. Hall
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Amita M. Vaidya
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Xujie Liu
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Andrew L. Schilb
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Josef H. Scheidt
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| | - Zheng-Rong Lu
- Department of Biomedical Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio
| |
Collapse
|
61
|
Rozenbaum R, Andrén OCJ, van der Mei HC, Woudstra W, Busscher HJ, Malkoch M, Sharma PK. Penetration and Accumulation of Dendrons with Different Peripheral Composition in Pseudomonas aeruginosa Biofilms. NANO LETTERS 2019; 19:4327-4333. [PMID: 31142116 PMCID: PMC6628176 DOI: 10.1021/acs.nanolett.9b00838] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/28/2019] [Indexed: 06/09/2023]
Abstract
Multidrug resistant bacterial infections threaten to become the number one cause of death by the year 2050. Development of antimicrobial dendritic polymers is considered promising as an alternative infection control strategy. For antimicrobial dendritic polymers to effectively kill bacteria residing in infectious biofilms, they have to penetrate and accumulate deep into biofilms. Biofilms are often recalcitrant to antimicrobial penetration and accumulation. Therefore, this work aims to determine the role of compact dendrons with different peripheral composition in their penetration into Pseudomonas aeruginosa biofilms. Red fluorescently labeled dendrons with pH-responsive NH3+ peripheral groups initially penetrated faster from a buffer suspension at pH 7.0 into the acidic environment of P. aeruginosa biofilms than dendrons with OH or COO- groups at their periphery. In addition, dendrons with NH3+ peripheral groups accumulated near the top of the biofilm due to electrostatic double-layer attraction with negatively charged biofilm components. However, accumulation of dendrons with OH and COO- peripheral groups was more evenly distributed across the depth of the biofilms than NH3+ composed dendrons and exceeded accumulation of NH3+ composed dendrons after 10 min of exposure. Unlike dendrons with NH3+ groups at their periphery, dendrons with OH or COO- peripheral groups, lacking strong electrostatic double-layer attraction with biofilm components, were largely washed-out during exposure to PBS without dendrons. Thus, penetration and accumulation of dendrons into biofilms is controlled by their peripheral composition through electrostatic double-layer interactions, which is an important finding for the further development of new antimicrobial or antimicrobial-carrying dendritic polymers.
Collapse
Affiliation(s)
- René
T. Rozenbaum
- Department
of Biomedical Engineering, University of
Groningen and University Medical Center Groningen, P.O. Box 196, 9700 AD, Groningen, The Netherlands
| | - Oliver C. J. Andrén
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 10044 Stockholm, Sweden
| | - Henny C. van der Mei
- Department
of Biomedical Engineering, University of
Groningen and University Medical Center Groningen, P.O. Box 196, 9700 AD, Groningen, The Netherlands
| | - Willem Woudstra
- Department
of Biomedical Engineering, University of
Groningen and University Medical Center Groningen, P.O. Box 196, 9700 AD, Groningen, The Netherlands
| | - Henk J. Busscher
- Department
of Biomedical Engineering, University of
Groningen and University Medical Center Groningen, P.O. Box 196, 9700 AD, Groningen, The Netherlands
| | - Michael Malkoch
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, 10044 Stockholm, Sweden
| | - Prashant K. Sharma
- Department
of Biomedical Engineering, University of
Groningen and University Medical Center Groningen, P.O. Box 196, 9700 AD, Groningen, The Netherlands
| |
Collapse
|
62
|
Urbán P, Liptrott NJ, Bremer S. Overview of the blood compatibility of nanomedicines: A trend analysis of in vitro and in vivo studies. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2019; 11:e1546. [PMID: 30556649 PMCID: PMC7816241 DOI: 10.1002/wnan.1546] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 10/03/2018] [Accepted: 10/12/2018] [Indexed: 12/12/2022]
Abstract
As nanomedicines have the potential to address many currently unmet medical needs, the early identification of regulatory requirements that could hamper a smooth translation of nanomedicines from the laboratory environment to clinical applications is of utmost importance. The blood system is especially relevant as many nanomedicinal products that are currently under development are designed for intravenous administration and cells of the blood system will be among the first biological systems exposed to the injected nanomedicine. This review collects and summarizes the current knowledge related to the blood compatibility of nanomedicines and nanomaterials with a potential use in biomedical applications. Different types of nanomedicines were analyzed for their toxicity to the blood system, and the role of their physicochemical properties was further elucidated. Trends were identified related to: (a) the nature of the most frequently occurring blood incompatibilities such as thrombogenicity and complement activation, (b) the contribution of physicochemical properties to these blood incompatibilities, and (c) the similarities between data retrieved from in vivo and in vitro studies. Finally, we provide an overview of available standards that allow evaluating the compatibility of a material with the blood system. This article is categorized under: Toxicology and Regulatory Issues in Nanomedicine > Toxicology of Nanomaterials Therapeutic Approaches and Drug Discovery > Emerging Technologies Toxicology and Regulatory Issues in Nanomedicine > Regulatory and Policy Issues in Nanomedicine.
Collapse
Affiliation(s)
- Patricia Urbán
- Consumer Products Safety Unit, Directorate F ‐ Health, Consumers and Reference Materials, European Commission Joint Research Centre (JRC)Ispra (VA)Italy
| | - Neill J. Liptrott
- Department of Molecular and Clinical PharmacologyInstitute of Translational Medicine, University of LiverpoolLiverpoolUK
| | - Susanne Bremer
- Consumer Products Safety Unit, Directorate F ‐ Health, Consumers and Reference Materials, European Commission Joint Research Centre (JRC)Ispra (VA)Italy
| |
Collapse
|
63
|
Eskandari P, Bigdeli B, Porgham Daryasari M, Baharifar H, Bazri B, Shourian M, Amani A, Sadighi A, Goliaei B, Khoobi M, Saboury AA. Gold-capped mesoporous silica nanoparticles as an excellent enzyme-responsive nanocarrier for controlled doxorubicin delivery. J Drug Target 2019; 27:1084-1093. [PMID: 30900473 DOI: 10.1080/1061186x.2019.1599379] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Mesoporous silica nanoparticles (MSNs) have ideal characteristics as next generation of controlled drug delivery systems. In this study, a MSN-based nanocarrier was fabricated and gold nanoparticle (GNP)-biotin conjugates were successfully grafted onto the pore outlets of the prepared MSN. This bioconjugate served as a capping agent with a peptide-cleavable linker sensitive to matrix metalloproteinases (MMPs), which are overexpressed extracellular proteolytic enzymes in cancerous tissue. The prepared nanocarriers were fully characterised by scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption/desorption, Fourier transform infra-red spectroscopy (FTIR), dynamic light scattering (DLS) and thermo gravimetric analysis (TGA). In vitro release studies showed efficient capping of MSNs with gold gate and controlled release of Doxorubicin (DOX) in the presence of matrix metalloproteinase-2 (MMP-2) and acidic pH values. High DOX-loading capacity (21%) and encapsulation efficiency (95.5%) were achieved using fluorescence technique. DOX-loaded nanocarriers showed high cytocompatibility and could efficiently induce cell death and apoptosis in the MMP-2 overexpressed cell lines. Moreover, Haemolysis, platelet activation and inflammatory responses assessment approved excellent hemocompatibility and minimal side effects by encapsulation of DOX in MSNs carrier.
Collapse
Affiliation(s)
- Parvaneh Eskandari
- Institute of Biochemistry and Biophysics, University of Tehran , Tehran , Iran
| | - Bahare Bigdeli
- Institute of Biochemistry and Biophysics, University of Tehran , Tehran , Iran
| | - Mohammad Porgham Daryasari
- Biomaterials Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences , Tehran , Iran
| | - Hadi Baharifar
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences , Tehran , Iran
| | - Behroz Bazri
- Department of Chemistry, Amirkabir University of Technology , Tehran , Iran
| | | | - Amir Amani
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences , Tehran , Iran
| | - Armin Sadighi
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, University of Rhode Island , Kingston , RI, USA
| | - Bahram Goliaei
- Institute of Biochemistry and Biophysics, University of Tehran , Tehran , Iran
| | - Mehdi Khoobi
- Biomaterials Group, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences , Tehran , Iran.,Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center (MBRC), Faculty of Pharmacy, Tehran University of Medical Sciences , Tehran , Iran
| | - Ali A Saboury
- Institute of Biochemistry and Biophysics, University of Tehran , Tehran , Iran
| |
Collapse
|
64
|
Markowicz-Piasecka M, Sadkowska A, Podsiedlik M, Mikiciuk-Olasik E, Sikora J. Generation 2 (G2) - Generation 4 (G4) PAMAM dendrimers disrupt key plasma coagulation parameters. Toxicol In Vitro 2019; 59:87-99. [PMID: 30981695 DOI: 10.1016/j.tiv.2019.04.010] [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: 01/14/2019] [Revised: 03/26/2019] [Accepted: 04/10/2019] [Indexed: 11/08/2022]
Abstract
The aim of the research was to evaluate the effects of G2 - G4 PAMAM dendrimers on basic plasma haemostasis parameters (Partially Activated Thrombin Time (APTT), Prothrombin Time (PT), Thrombin Time (TT)) as well as the activity of factor X, antithrombin III (AT), protein C and plasmin. Furthermore, tissue factor (TF) synthesis in endothelial cells and viability of smooth muscle cells in the presence of PAMAM dendrimers was investigated. APTT, PT and TT were performed according to the available commercial methods. The activity of factor X was conducted based on deficient plasma factor X. Protein C, AT and plasmin activity were measured spectrophotometrically using chromogenic substrates. Intracellular TF production in human umbilical vein endothelial cells (HUVECs) was measured using immunohistochemical method. Viability of Human Aortal Smooth Muscle cells (hAoSMCs) was established using WST-1 assay. PAMAM dendrimers decreased activity of factor X, and concomitantly prolonged PT and APTT. We also demonstrated shortened TT and increased fibrinogen concentrations in plasma treated with G4 PAMAM dendrimers, suggesting formation of fibrinogen aggregates. G2 - G4 PAMAM dendrimers decreased the activity of both naturally occurring anticoagulants AT and protein C. G2 and G3 PAMAM dendrimers did not affect the proteolytic reaction with plasmin. PAMAM dendrimers were found not to trigger TF production in undisturbed endothelial cells. PAMAM dendrimers, depending on the concentration and generation decreased viability of AoSMCs. The results presented within the current study suggest complex but mostly undesirable effect of G2 - G4 PAMAM dendrimers on plasma haemostasis and underscore the need for further in-depth research.
Collapse
Affiliation(s)
- Magdalena Markowicz-Piasecka
- Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego1, 90-151 Lodz, Poland.
| | - Adrianna Sadkowska
- Students Research Group, Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego 1, 90-151 Lodz, Poland.
| | - Maria Podsiedlik
- Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego1, 90-151 Lodz, Poland.
| | - Elżbieta Mikiciuk-Olasik
- Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego 1, 90-151 Lodz, Poland.
| | - Joanna Sikora
- Laboratory of Bioanalysis, Department of Pharmaceutical Chemistry, Drug Analysis and Radiopharmacy, Medical University of Lodz, ul. Muszyńskiego1, 90-151 Lodz, Poland.
| |
Collapse
|
65
|
Ilinskaya AN, Shah A, Enciso AE, Chan KC, Kaczmarczyk JA, Blonder J, Simanek EE, Dobrovolskaia MA. Nanoparticle physicochemical properties determine the activation of intracellular complement. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2019; 17:266-275. [PMID: 30794962 PMCID: PMC6520145 DOI: 10.1016/j.nano.2019.02.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/29/2019] [Accepted: 02/03/2019] [Indexed: 01/25/2023]
Abstract
The complement system plays an essential role in both innate and adaptive immunity. The traditional understanding of this system comes from studies investigating complement proteins produced by the liver and present in plasma to "complement" the immune cell-mediated response to invading pathogens. Recently, it has been reported that immune cells including, but not limited to, T-cells and monocytes, express complement proteins. This complement is referred to as intracellular (IC) and implicated in the regulation of T-cell activation. The mechanisms and the structure-activity relationship between nanomaterials and IC, however, are currently unknown. Herein, we describe a structure-activity relationship study demonstrating that under in vitro conditions, only polymeric materials with cationic surfaces activate IC in T-cells. The effect also depends on particle size and occurs through a mechanism involving membrane damage, thereby IC on the cell surface serves as a self-opsonization marker in response to the nanoparticle-triggered danger affecting the cell integrity.
Collapse
Affiliation(s)
- Anna N Ilinskaya
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, MD
| | - Ankit Shah
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, MD
| | - Alan E Enciso
- Department of Chemistry & Biochemistry, Texas Christian University, Fort Worth, TX
| | - King C Chan
- Protein Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, sponsored by the National Cancer Institute, Frederick, MD
| | - Jan A Kaczmarczyk
- Antibody Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, MD
| | - Josip Blonder
- Antibody Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, MD
| | - Eric E Simanek
- Department of Chemistry & Biochemistry, Texas Christian University, Fort Worth, TX
| | - Marina A Dobrovolskaia
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research sponsored by the National Cancer Institute, Frederick, MD.
| |
Collapse
|
66
|
Patel M, De Paoli SH, Elhelu OK, Farooq S, Simak J. Cell membrane disintegration and extracellular vesicle release in a model of different size and charge PAMAM dendrimers effects on cultured endothelial cells. Nanotoxicology 2019; 13:664-681. [DOI: 10.1080/17435390.2019.1570373] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mehulkumar Patel
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Silvia H. De Paoli
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Oumsalama K. Elhelu
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Sehrish Farooq
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Jan Simak
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| |
Collapse
|
67
|
Li Y, Hu C, Wang P, Liu Y, Wang L, Pi Q, Gong Z, Yang X, Mak M, Wu Y. Indoor nanoscale particulate matter-induced coagulation abnormality based on a human 3D microvascular model on a microfluidic chip. J Nanobiotechnology 2019; 17:20. [PMID: 30709410 PMCID: PMC6357445 DOI: 10.1186/s12951-019-0458-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 01/21/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND A growing body of evidence shows that indoor concentrations of airborne particles are often higher than is typically encountered outdoors. Since exposure to indoor PM2.5 is thought to be associated with cardiovascular disease, the health impacts of indoor air pollution need to be explored. Based on animal models, ambient particulate matter has been proved to promote coagulation which is very likely involved in the pathogenic development of cardiovascular disease. However, animal models are insufficient to predict what will happen with any certainty in humans. For this reason, the precise pathogenic mechanisms behind the development of cardiovascular disease in humans have not yet been determined. RESULTS We generated a 3D functional human microvascular network in a microfluidic device. This model enables human vascular endothelial cells to form tissue-like microvessels that behave very similarly to human blood vessels. The perfusable microvasculature allows the delivery of particles introduced into these generated human-like microvessels to follow the fluid flow. This exposure path effectively simulates the dynamic movement of airborne nanoscale particles (ANPs) within human vessels. In this study, we first identified the existence of ANPs in indoor air pollution. We then showed that ANPs could activate endothelial cells via ROS induced inflammation, and further resulted in abnormal expression of the coagulation factors (TF, TM and t-PA) involved in coagulation cascades. In addition, we found that a protein could cover ANPs, and this biointeraction could interfere with heparan sulfate (HS). Human organotypic 3D microvessel models provide a bridge for how research outcomes can translate to humans. CONCLUSIONS The 3D human microvessel model was used to determine the physiological responses of human vessels to ANP stimulation. Based on the obtained data, we concluded that ANPs not only disrupts normal coagulation functions, but also act directly on anticoagulant factors in human vessels. These experimental observations provide a potential biological explanation for the epidemiologically established link between ANPs and coagulation abnormality. This organ-on-chip model may provide a bridge from in vitro results to human responses.
Collapse
Affiliation(s)
- Yan Li
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
- Department of Biomedical Engineering, School of Engineering & Applied Science, Yale University, New Haven, 06520 USA
| | - Chuanlin Hu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070 People’s Republic of China
| | - Pengcheng Wang
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
| | - Yan Liu
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
| | - Luyang Wang
- Department of Building Science, Tsinghua University, Beijing, 100084 People’s Republic of China
| | - Qingmeng Pi
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139 USA
- Department of Plastic and Reconstructive Surgery, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200129 People’s Republic of China
| | - Zhiyong Gong
- Key Laboratory for Deep Processing of Major Grain and Oil (Wuhan Polytechnic University), Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
| | - Xu Yang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Central China Normal University, Wuhan, 430079 People’s Republic of China
| | - Michael Mak
- Department of Biomedical Engineering, School of Engineering & Applied Science, Yale University, New Haven, 06520 USA
| | - Yang Wu
- Hubei Key Laboratory for Processing and Transformation of Agricultural Products (Wuhan Polytechnic University), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, 430023 People’s Republic of China
| |
Collapse
|
68
|
Montero N, Pérez E, Benito M, Teijón C, Teijón JM, Olmo R, Blanco MD. Biocompatibility studies of intravenously administered ionic-crosslinked chitosan-BSA nanoparticles as vehicles for antitumour drugs. Int J Pharm 2018; 554:337-351. [PMID: 30439492 DOI: 10.1016/j.ijpharm.2018.11.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/08/2018] [Accepted: 11/11/2018] [Indexed: 01/21/2023]
Abstract
In this study, a new alternative of ionic crosslinked nanoparticles (NPs) based on chitosan (C) and bovine serum albumin (A; BSA) was evaluated as drug delivery system for antitumour compounds (doxorubicin hydrochloride as a model). The different responses to the pH of the medium were determined by the electrostatic interactions induced by each polymeric combination (C50/A50; C80/A20; C20/A80). NPs revealed a nanoscale size (167-392 nm) and a positive net charge (12-26 mV), modulated by doxorubicin (DOX) loading. Drug loading capacity was higher than 5.2 ± 1.8 μgDOX/mgNP (Encapsulation efficiency = 34%), and an initial burst release was followed by a sustained delivery. Cellular uptake assays confirmed the entry of NPs in three human tumor cells (MCF7, T47D and Hela), triggering antioxidant responses (superoxide dismutase, catalase, glutathione reductase and total glutathione content) in those cells. This was also consistent with the decreased in IC50 values observed after the incubation of these cells with C20/A80-DOX and C50/A50-DOX NPs (1.90-3.48 μg/mL) compared with free DOX (2.36-6.025 μg/mL). In vivo results suggested that the selected proportions of chitosan-BSA created nonhemolytic and biocompatible stable NPs at the selected dose of 20 mg/kg. Despite the different formulations, this study demonstrated that these NPs could serve as safe drug carriers in further in vivo investigations.
Collapse
Affiliation(s)
- Nuria Montero
- Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Bioquímica y Biología Molecular III, Spain.
| | - Elena Pérez
- Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Bioquímica y Biología Molecular III, Spain; Universidad Europea de Madrid, Faculty of Biomedical and Health Sciences, Departamento de Farmacia, Biotecnología, Nutrición, Óptica y Optometría, Department of Pharmacy, Biotechnology, Nutrition, Optics and Optometry, Spain.
| | - Marta Benito
- Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Bioquímica y Biología Molecular III, Spain; Fundación San Juan de Dios, Centro de CC de la Salud San Rafael, Universidad Antonio de Nebrija, Spain.
| | - César Teijón
- Universidad Complutense de Madrid, Facultad de Enfermería, Fisioterapia y Podología, Departamento de Enfermería, Spain.
| | - José María Teijón
- Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Bioquímica y Biología Molecular III, Spain.
| | - Rosa Olmo
- Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Bioquímica y Biología Molecular III, Spain.
| | - M Dolores Blanco
- Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Bioquímica y Biología Molecular III, Spain.
| |
Collapse
|
69
|
Oztuna A, Nazir H. Pentafluoropropionic Anhydride Functionalized PAMAM Dendrimer as miRNA Delivery Reagent. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2018. [DOI: 10.18596/jotcsa.463855] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
|
70
|
Sharma A, Liaw K, Sharma R, Zhang Z, Kannan S, Kannan RM. Targeting Mitochondrial Dysfunction and Oxidative Stress in Activated Microglia using Dendrimer-Based Therapeutics. Theranostics 2018; 8:5529-5547. [PMID: 30555562 PMCID: PMC6276292 DOI: 10.7150/thno.29039] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/10/2018] [Indexed: 01/14/2023] Open
Abstract
Mitochondrial oxidative stress is associated with many neurodegenerative diseases, such as traumatic brain injury (TBI). Targeted delivery of antioxidants to mitochondria has failed to translate into clinical success due to their nonspecific cellular localization, poor transport properties across multiple biological barriers, and associated side effects. These challenges, coupled with the complex function of the mitochondria, create the need for innovative delivery strategies. Methods: Neutral hydroxyl-terminated polyamidoamine (PAMAM) dendrimers have shown significant potential as nanocarriers in multiple brain injury models. N-acetyl cysteine (NAC) is a clinically used antioxidant and anti-inflammatory agent which has shown significant potency when delivered in a targeted manner. Here we present a mitochondrial targeting hydroxyl PAMAM dendrimer-drug construct (TPP-D-NAC) with triphenyl-phosphonium (TPP) for mitochondrial targeting and NAC for targeted delivery to mitochondria in injured glia. Co-localization and mitochondrial content of mitochondria-targeted and unmodified dendrimer were assessed in microglia and macrophages in vitro via immunohistochemistry and fluorescence quantification. Therapeutic improvements of TPP-D-NAC over dendrimer-NAC conjugate (D-NAC) and free NAC were evaluated in vitro in microglia under oxidative stress challenge. In vivo neuroinflammation targeting was confirmed in a rabbit model of TBI. Results: TPP-conjugated dendrimer co-localized significantly more with mitochondria than unmodified dendrimer without altering overall levels of cellular internalization. This targeting capability translated to significant improvements in the attenuation of oxidative stress by TPP-D-NAC compared to D-NAC and free NAC. Upon systemic administration in a rabbit TBI model, TPP-conjugated dendrimer co-localized specifically with mitochondria in activated microglia and macrophages in the white matter of the ipsilateral/injured hemisphere, confirming its BBB penetration and glial targeting capabilities. Conclusion: D-NAC has shown promising efficacy in many animal models of neurodegeneration, and this work provides evidence that modification for mitochondrial targeting can further enhance its therapeutic efficacy, particularly in diseases where oxidative stress-induced glial cell death plays a significant role in disease progression.
Collapse
Affiliation(s)
- Anjali Sharma
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Kevin Liaw
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore MD, 21218, USA
| | - Rishi Sharma
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Zhi Zhang
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Sujatha Kannan
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- Hugo W. Moser Research Institute at Kennedy Krieger, Inc., Baltimore MD, 21205, USA
- Kennedy Krieger Institute - Johns Hopkins University for Cerebral Palsy Research Excellence, Baltimore, MD 21218, USA
| | - Rangaramanujam M. Kannan
- Center for Nanomedicine, Department of Ophthalmology, Wilmer Eye Institute Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore MD, 21218, USA
- Hugo W. Moser Research Institute at Kennedy Krieger, Inc., Baltimore MD, 21205, USA
- Kennedy Krieger Institute - Johns Hopkins University for Cerebral Palsy Research Excellence, Baltimore, MD 21218, USA
| |
Collapse
|
71
|
Siegrist S, Cörek E, Detampel P, Sandström J, Wick P, Huwyler J. Preclinical hazard evaluation strategy for nanomedicines. Nanotoxicology 2018; 13:73-99. [PMID: 30182784 DOI: 10.1080/17435390.2018.1505000] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The increasing nanomedicine usage has raised concerns about their possible impact on human health. Present evaluation strategies for nanomaterials rely on a case-by-case hazard assessment. They take into account material properties, biological interactions, and toxicological responses. Authorities have also emphasized that exposure route and intended use should be considered in the safety assessment of nanotherapeutics. In contrast to an individual assessment of nanomaterial hazards, we propose in the present work a novel and unique evaluation strategy designed to uncover potential adverse effects of such materials. We specifically focus on spherical engineered nanoparticles used as parenterally administered nanomedicines. Standardized assay protocols from the US Nanotechnology Characterization Laboratory as well as the EU Nanomedicine Characterisation Laboratory can be used for experimental data generation. We focus on both cellular uptake and intracellular persistence as main indicators for nanoparticle hazard potentials. Based on existing regulatory specifications defined by authorities such as the European Medicines Agency and the United States Food and Drug Administration, we provide a robust framework for application-oriented classification paired with intuitive decision making. The Hazard Evaluation Strategy (HES) for injectable nanoparticles is a three-tiered concept covering physicochemical characterization, nanoparticle (bio)interactions, and hazard assessment. It is cost-effective and can assist in the design and optimization of nanoparticles intended for therapeutic use. Furthermore, this concept is designed to be adaptable for alternative exposure and application scenarios. To the knowledge of the authors, the HES is unique in its methodology based on exclusion criteria. It is the first hazard evaluation strategy designed for nanotherapeutics.
Collapse
Affiliation(s)
- Stefan Siegrist
- a Division of Pharmaceutical Technology , Pharmacenter, University of Basel , Basel , Switzerland
| | - Emre Cörek
- a Division of Pharmaceutical Technology , Pharmacenter, University of Basel , Basel , Switzerland
| | - Pascal Detampel
- a Division of Pharmaceutical Technology , Pharmacenter, University of Basel , Basel , Switzerland
| | - Jenny Sandström
- b Swiss Centre for Applied Human Toxicology , Basel , Switzerland
| | - Peter Wick
- c Laboratory for Patricles-Biology Interactions , Empa Swiss Federal Laboratories for Materials Science and Technology , St. Gallen , Switzerland
| | - Jörg Huwyler
- a Division of Pharmaceutical Technology , Pharmacenter, University of Basel , Basel , Switzerland
| |
Collapse
|
72
|
Liang Y, Xu C, Li G, Liu T, Liang JF, Wang X. Graphene-kaolin composite sponge for rapid and riskless hemostasis. Colloids Surf B Biointerfaces 2018; 169:168-175. [DOI: 10.1016/j.colsurfb.2018.05.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 05/05/2018] [Accepted: 05/07/2018] [Indexed: 11/16/2022]
|
73
|
Meneksedag-Erol D, Kizhakkedathu JN, Tang T, Uludağ H. Molecular Dynamics Simulations on Nucleic Acid Binding Polymers Designed To Arrest Thrombosis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:28399-28411. [PMID: 30085650 DOI: 10.1021/acsami.8b09914] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Cancer-associated thrombosis is managed by the administration of anticoagulants and antithrombotic agents that have a high risk of inducing hemorrhagic complications. To develop safer strategies for antithrombotic therapy, in vivo activators of the intrinsic pathway, namely, cell-free nucleic acids (DNA and RNA) have been targeted with cationic, polyamine-based polymers. The cytotoxicity of the highly cationic polymers is a major drawback for their practical use, and biocompatible alternatives are in high demand. In this study, we carried out all-atom molecular dynamics simulations to systematically examine the DNA binding of polyamine-poly(ethylene glycol) (PEG) diblock polymers designed from biocompatible building blocks to inhibit the procoagulant activity of DNA. The differences in cationic charge, PEG chain length, and initial conformations of the polymers resulted in marked differences in their binding to DNA. We found that having an exposed cationic polyamine group is essential to polymer-DNA binding and a certain level of electrostatic interactions is necessary to maintain the bound state. Intrachain associations between the polyamine groups and PEG chains in some cases have led to a collapsed state of the polymer that precludes binding to DNA. This self-association is mainly due to a strong hydrogen bond between polymer polyamine and PEG groups and partly due to a partially charged semibranched polyamine group architecture. As polymer "masking" of DNA is thought to arrest DNA's prothrombotic activity, our findings highlight the desired structural features of the polymers for stronger DNA binding and provide insights into the design of novel antithrombotic agents.
Collapse
Affiliation(s)
- Deniz Meneksedag-Erol
- Department of Biomedical Engineering , University of Alberta , Edmonton , Alberta T6G 2V2 , Canada
| | - Jayachandran N Kizhakkedathu
- Centre for Blood Research , University of British Columbia , Vancouver , British Columbia V6T 1Z3 , Canada
- Department of Pathology and Laboratory Medicine , University of British Columbia , Vancouver , British Columbia V6T 2B5 , Canada
- Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Tian Tang
- Department of Biomedical Engineering , University of Alberta , Edmonton , Alberta T6G 2V2 , Canada
| | - Hasan Uludağ
- Department of Biomedical Engineering , University of Alberta , Edmonton , Alberta T6G 2V2 , Canada
- Faculty of Pharmacy and Pharmaceutical Sciences , University of Alberta , Edmonton , Alberta T6G 2H7 , Canada
| |
Collapse
|
74
|
Alfei S, Catena S. Synthesis and characterization of versatile amphiphilic dendrimers peripherally decorated with positively charged amino acids. POLYM INT 2018. [DOI: 10.1002/pi.5680] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Silvana Alfei
- Dipartimento di Farmacia, Sezione di Chimica e Tecnologie Farmaceutiche e Alimentari; Università di Genova; Genoa Italy
| | - Silvia Catena
- Dipartimento di Farmacia, Sezione di Chimica e Tecnologie Farmaceutiche e Alimentari; Università di Genova; Genoa Italy
| |
Collapse
|
75
|
Chen G, Wang Y, Wu P, Zhou Y, Yu F, Zhu C, Li Z, Hang Y, Wang K, Li J, Sun M, Oupicky D. Reversibly Stabilized Polycation Nanoparticles for Combination Treatment of Early- and Late-Stage Metastatic Breast Cancer. ACS NANO 2018; 12:6620-6636. [PMID: 29985577 DOI: 10.1021/acsnano.8b01482] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Metastatic breast cancer is a major cause of cancer-related female mortality worldwide. The signal transducer and activator of transcription 3 (STAT3) and the chemokine receptor CXCR4 are involved in the metastatic spread of breast cancer. The goal of this study was to develop nanomedicine treatment based on combined inhibition of STAT3 and CXCR4. We synthesized a library of CXCR4-inhibiting polymers with a combination of beneficial features that included PEGylation, fluorination, and bioreducibility to achieve systemic delivery of siRNA to silence STAT3 expression in the tumors. An in vivo structure-activity relationship study in an experimental lung metastasis model revealed superior antimetastatic activity of bioreducible fluorinated polyplexes when compared with nonreducible controls despite similar CXCR4 antagonism and the ability to inhibit in vitro cancer cell invasion. When compared with nonreducible and nonfluorinated polyplexes, improved siRNA delivery was observed with the bioreducible fluorinated polyplexes. The improvement was ascribed to a combination of enhanced physical stability, decreased serum destabilization, and improved intracellular trafficking. Pharmacokinetic analysis showed that fluorination decreased the rate of renal clearance of the polyplexes and contributed to enhanced accumulation in the tumors. Therapeutic efficacy of the polyplexes with STAT3 siRNA was assessed in early stage breast cancer and late-stage metastatic breast cancer with primary tumor resection. Strong inhibition of the primary tumor growth and pronounced antimetastatic effects were observed in both models of metastatic breast cancer. Mechanistic studies revealed multifaceted mechanism of action of the combined STAT3 and CXCR4 inhibition by the developed polyplexes relying both on local and systemic effects.
Collapse
Affiliation(s)
- Gang Chen
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Yixin Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Pengkai Wu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Yiwen Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Fei Yu
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences , University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
| | - Chenfei Zhu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Zhaoting Li
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Yu Hang
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences , University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
| | - Kaikai Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - Jing Li
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences , University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
| | - Minjie Sun
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
| | - David Oupicky
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics , China Pharmaceutical University , Nanjing 210009 , China
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences , University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
| |
Collapse
|
76
|
Alfei S, Catena S. Synthesis and characterization of fourth generation polyester-based dendrimers with cationic amino acids-modified crown as promising water soluble biomedical devices. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4396] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Silvana Alfei
- Dipartimento di Farmacia, Sezione di Chimica e Tecnologie Farmaceutiche e Alimentari; Università di Genova; Viale Cembrano 4 I-16148 Genoa Italy
| | - Silvia Catena
- Dipartimento di Farmacia, Sezione di Chimica e Tecnologie Farmaceutiche e Alimentari; Università di Genova; Viale Cembrano 4 I-16148 Genoa Italy
| |
Collapse
|
77
|
PAMAM dendrimer - cell membrane interactions. Adv Colloid Interface Sci 2018; 257:1-18. [PMID: 30008347 DOI: 10.1016/j.cis.2018.06.005] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 12/16/2022]
Abstract
PAMAM dendrimers have been conjectured for a wide range of biomedical applications due to their tuneable physicochemical properties. However, their application has been hindered by uncertainties in their cytotoxicity, which is influenced by dendrimer generation (i.e. size and surface group density), surface chemistry, and dosage, as well as cell specificity. In this review, biomedical applications of polyamidoamine (PAMAM) dendrimers and some related cytotoxicity studies are first outlined. Alongside these in vitro experiments, lipid membranes such as supported lipid bilayers (SLBs), liposomes, and Langmuir monolayers have been used as cell membrane models to study PAMAM dendrimer-membrane interactions. Related experimental and theoretical studies are summarized, and the physical insights from these studies are discussed to shed light on the fundamental understanding of PAMAM dendrimer-cell membrane interactions. We conclude with a summary of some questions that call for further investigations.
Collapse
|
78
|
Matus MF, Ludueña M, Vilos C, Palomo I, Mariscal MM. Atomic-level characterization and cilostazol affinity of poly(lactic acid) nanoparticles conjugated with differentially charged hydrophilic molecules. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1328-1338. [PMID: 29977668 PMCID: PMC6009487 DOI: 10.3762/bjnano.9.126] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
Nanotherapeutics is a promising field for numerous diseases and represents the forefront of modern medicine. In the present work, full atomistic computer simulations were applied to study poly(lactic acid) (PLA) nanoparticles conjugated with polyethylene glycol (PEG). The formation of this complex system was simulated using the reactive polarizable force field (ReaxFF). A full picture of the morphology, charge and functional group distribution is given. We found that all terminal groups (carboxylic acid, methoxy and amino) are randomly distributed at the surface of the nanoparticles. The surface design of NPs requires that the charged groups must surround the surface region for an optimal functionalization/charge distribution, which is a key factor in determining physicochemical interactions with different biological molecules inside the organism. Another important point that was investigated was the encapsulation of drugs in these nanocarriers and the prediction of the polymer-drug interactions, which provided a better insight into structural features that could affect the effectiveness of drug loading. We employed blind docking to predict NP-drug affinity testing on an antiaggregant compound, cilostazol. The results suggest that the combination of molecular dynamics ReaxFF simulations and blind docking techniques can be used as an explorative tool prior to experiments, which is useful for rational design of new drug delivery systems.
Collapse
Affiliation(s)
- María Francisca Matus
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca, Chile
| | - Martín Ludueña
- INFIQC, CONICET, Departamento de Química Teórica y Computacional, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, XUA5000 Córdoba, Argentina
| | - Cristian Vilos
- Laboratory of Nanomedicine and Targeted Delivery, Center for Integrative Medicine and Innovative Science (CIMIS), Faculty of Medicine & Center for Bioinformatics and Integrative Biology (CBIB), Faculty of Life Sciences, Universidad Andres Bello, Santiago, Chile
- Center for the Development of Nanoscience and Nanotechnology (CEDENNA), Universidad de Santiago de Chile, Santiago, Chile
| | - Iván Palomo
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca, Chile
| | - Marcelo M Mariscal
- INFIQC, CONICET, Departamento de Química Teórica y Computacional, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, XUA5000 Córdoba, Argentina
| |
Collapse
|
79
|
Sharma R, Sharma A, Kambhampati SP, Reddy RR, Zhang Z, Cleland JL, Kannan S, Kannan RM. Scalable synthesis and validation of PAMAM dendrimer- N-acetyl cysteine conjugate for potential translation. Bioeng Transl Med 2018; 3:87-101. [PMID: 30065965 PMCID: PMC6063872 DOI: 10.1002/btm2.10094] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/25/2018] [Accepted: 04/26/2018] [Indexed: 01/13/2023] Open
Abstract
Dendrimer-N-acetyl cysteine (D-NAC) conjugate has shown significant promise in multiple preclinical models of brain injury and is undergoing clinical translation. D-NAC is a generation-4 hydroxyl-polyamidoamine dendrimer conjugate where N-acetyl cysteine (NAC) is covalently bound through disulfide linkages on the surface of the dendrimer. It has shown remarkable potential to selectively target and deliver NAC to activated microglia and astrocytes at the site of brain injury in several animal models, producing remarkable improvements in neurological outcomes at a fraction of the free drug dose. Here we present a highly efficient, scalable, greener, well-defined route to the synthesis of D-NAC, and validate the structure, stability and activity to define the benchmarks for this compound. This newly developed synthetic route has significantly reduced the synthesis time from three weeks to one week, uses industry-friendly solvents/reagents, and involves simple purification procedures, potentially enabling efficient scale up.
Collapse
Affiliation(s)
- Rishi Sharma
- Center for Nanomedicine, Department of OphthalmologyWilmer Eye Institute Johns Hopkins University School of MedicineBaltimoreMD21287
| | - Anjali Sharma
- Center for Nanomedicine, Department of OphthalmologyWilmer Eye Institute Johns Hopkins University School of MedicineBaltimoreMD21287
| | - Siva P. Kambhampati
- Center for Nanomedicine, Department of OphthalmologyWilmer Eye Institute Johns Hopkins University School of MedicineBaltimoreMD21287
| | - Rajsekar Rami Reddy
- Center for Nanomedicine, Department of OphthalmologyWilmer Eye Institute Johns Hopkins University School of MedicineBaltimoreMD21287
| | - Zhi Zhang
- Dept. of Anesthesiology and Critical Care MedicineJohns Hopkins University School of MedicineBaltimoreMD21287
| | | | - Sujatha Kannan
- Center for Nanomedicine, Department of OphthalmologyWilmer Eye Institute Johns Hopkins University School of MedicineBaltimoreMD21287
- Dept. of Anesthesiology and Critical Care MedicineJohns Hopkins University School of MedicineBaltimoreMD21287
- Hugo W. Moser Research Institute at Kennedy Krieger, Inc.BaltimoreMD21205
- Kennedy Krieger Institute – Johns Hopkins University for Cerebral Palsy Research ExcellenceBaltimoreMD21287
| | - Rangaramanujam M. Kannan
- Center for Nanomedicine, Department of OphthalmologyWilmer Eye Institute Johns Hopkins University School of MedicineBaltimoreMD21287
- Hugo W. Moser Research Institute at Kennedy Krieger, Inc.BaltimoreMD21205
- Kennedy Krieger Institute – Johns Hopkins University for Cerebral Palsy Research ExcellenceBaltimoreMD21287
- Dept.of Chemical and Biomolecular EngineeringJohns Hopkins UniversityBaltimoreMD21218
| |
Collapse
|
80
|
Agotegaray MA, Campelo AE, Zysler RD, Gumilar F, Bras C, Gandini A, Minetti A, Massheimer VL, Lassalle VL. Magnetic nanoparticles for drug targeting: from design to insights into systemic toxicity. Preclinical evaluation of hematological, vascular and neurobehavioral toxicology. Biomater Sci 2018; 5:772-783. [PMID: 28256646 DOI: 10.1039/c6bm00954a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A simple two-step drug encapsulation method was developed to obtain biocompatible magnetic nanocarriers for the potential targeted treatment of diverse diseases. The nanodevice consists of a magnetite core coated with chitosan (Chit@MNPs) as a platform for diclofenac (Dic) loading as a model drug (Dic-Chit@MNPs). Mechanistic and experimental conditions related to drug incorporation and quantification are further addressed. This multi-disciplinary study aims to elucidate the toxicological impact of the MNPs at hematological, vascular, neurological and behavioral levels. Blood compatibility assays revealed that MNPs did not affect either erythrosedimentation rates or erythrocyte integrity at the evaluated doses (1, 10 and 100 μg mL-1). A microscopic evaluation of blood smears indicated that MNPs did not induce morphological changes in blood cells. Platelet aggregation was not affected by MNPs either and just a slight diminution was observed with Dic-Chit@MNPs, an effect possibly due to diclofenac. The examined formulations did not exert cytotoxicity on rat aortic endothelial cells and no changes in cell viability or their capacity to synthesize NO were observed. Behavioral and functional nervous system parameters in a functional observational battery were assessed after a subacute treatment of mice with Chit@MNPs. The urine pools of the exposed group were decreased. Nephritis and an increased number of megakaryocytes in the spleen were observed in the histopathological studies. Sub-acute exposure to Chit@MNPs did not produce significant changes in the parameters used to evaluate neurobehavioral toxicity. The aspects focused on within this manuscript are relevant at the pre-clinical level providing new and novel knowledge concerning the biocompatibility of magnetic nanodevices for biomedical applications.
Collapse
Affiliation(s)
- Mariela A Agotegaray
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
| | - Adrián E Campelo
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Roberto D Zysler
- CONICET - Centro Atómico Bariloche, Instituto Balseiro, S.C. de Bariloche, Argentina
| | - Fernanda Gumilar
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Cristina Bras
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Ariel Gandini
- Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Alejandra Minetti
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Virginia L Massheimer
- Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR-CONICET)-UNS Dpto. de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Verónica L Lassalle
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
| |
Collapse
|
81
|
Gordon MR, Zhao B, Anson F, Fernandez A, Singh K, Homyak C, Canakci M, Vachet RW, Thayumanavan S. Matrix Metalloproteinase-9-Responsive Nanogels for Proximal Surface Conversion and Activated Cellular Uptake. Biomacromolecules 2018; 19:860-871. [PMID: 29360342 PMCID: PMC6298948 DOI: 10.1021/acs.biomac.7b01659] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Here, we have exploited the heightened extracellular concentration of matrix metalloproteinase-9 (MMP-9) to induce surface-conversional properties of nanogels with the aim of tumor-specific enhanced cellular uptake. A modular polymeric nanogel platform was designed and synthesized for facile formulation and validation of MMP-9-mediated dePEGylation and generation of polyamine-type surface characteristics through peptide N-termini. Nanogels containing MMP-9-cleavable motifs and different poly(ethylene glycol) corona lengths (350 and 750 g/mol) were prepared, and enzymatic surface conversional properties were validated by MALDI characterization of cleaved byproducts, fluorescamine assay amine quantification, and zeta potential. The nanogel with a shorter PEG length, mPEG350-NG, exhibited superior surface conversion in response to extracellular concentrations of MMP-9 compared to that of the longer PEG length, mPEG750-NG. Confocal microscopy images of HeLa cells incubated with both fluorescein-labeled nanogels and DiI-encapsulated nanogels demonstrated greater uptake following MMP-9 "activation" for mPEG350-NG compared to its nontreated "passive" mPEG350-NG parent, demonstrating the versatility of such systems to achieve stimuli-responsive uptake in response to cancer-relevant proteases.
Collapse
Affiliation(s)
- Mallory R. Gordon
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Bo Zhao
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Francesca Anson
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Ann Fernandez
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Khushboo Singh
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Celia Homyak
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Mine Canakci
- Molecular and Cellular Biology Program, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - Richard W. Vachet
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
- Molecular and Cellular Biology Program, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
- Center for Bioactive Delivery at the Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| | - S. Thayumanavan
- Department of Chemistry, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
- Molecular and Cellular Biology Program, Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
- Center for Bioactive Delivery at the Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts 01003
| |
Collapse
|
82
|
Chen G, Wang K, Wang Y, Wu P, Sun M, Oupický D. Fluorination Enhances Serum Stability of Bioreducible Poly(amido amine) Polyplexes and Enables Efficient Intravenous siRNA Delivery. Adv Healthc Mater 2018; 7. [PMID: 29280311 DOI: 10.1002/adhm.201700978] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 11/04/2017] [Indexed: 01/09/2023]
Abstract
The use of small interfering RNA (siRNA) in cancer treatment has been limited by the lack of effective systemic delivery methods. Although synthetic polycations have been widely explored in siRNA delivery, polycation/siRNA polyplexes often suffer from insufficient stability in vivo. Here, rationally designed siRNA delivery systems that meet the requirements for systemic siRNA delivery to distant tumors are reported. The hypothesis that modular design of delivery systems based on poly(amido amine)s that combine fluorination for systemic stability with bioreducibility for easy intracellular siRNA release, and PEGylation for improved safety and colloidal stability will overcome problems with contradicting siRNA delivery demands is tested. PEGylated, fluorinated, and bioreducible copolymers (PEG-PCD-F) with different degree of fluorination are thus synthesized. The fluorinated copolymers readily formed polyplexes with siRNA and achieved greatly improved gene silencing efficacy in multiple cell lines in vitro when compared with nonfluorinated controls. The results show fluorination-induced enhancement of stability, cellular uptake, and endosomal escape of the polyplexes, while exhibiting efficient siRNA release in reducing intracellular environment. PEG-PCD-F polyplexes with siRNA against Bcl2 inhibit breast tumor growth following systemic intravenous administration. The results provide strong evidence of successful combination of bioreducibility with fluorination and PEGylation to achieve systemic siRNA polyplex delivery.
Collapse
Affiliation(s)
- Gang Chen
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Kaikai Wang
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Yixin Wang
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Pengkai Wu
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - Minjie Sun
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
| | - David Oupický
- State Key Laboratory of Natural Medicines; Department of Pharmaceutics; China Pharmaceutical University; Nanjing 210009 China
- Center for Drug Delivery and Nanomedicine; Department of Pharmaceutical Sciences; University of Nebraska Medical Center; Omaha NE 68198 USA
| |
Collapse
|
83
|
Nanda HS, Shah AH, Wicaksono G, Pokholenko O, Gao F, Djordjevic I, Steele TWJ. Nonthrombogenic Hydrogel Coatings with Carbene-Cross-Linking Bioadhesives. Biomacromolecules 2018; 19:1425-1434. [DOI: 10.1021/acs.biomac.8b00074] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Himansu Sekhar Nanda
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
- Department of Mechanical Engineering, PDPM-Indian Institute of Information Technology, Design and Manufacturing (IIITDM)-Jabalpur, Dumna Airport Road, Jabalpur-482005, Madhya Pradesh, India
| | - Ankur Harish Shah
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Gautama Wicaksono
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Oleksandr Pokholenko
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Feng Gao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Ivan Djordjevic
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey, Nuevo León 64849, Mexico
| | - Terry W. J. Steele
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| |
Collapse
|
84
|
Matus MF, Vilos C, Cisterna BA, Fuentes E, Palomo I. Nanotechnology and primary hemostasis: Differential effects of nanoparticles on platelet responses. Vascul Pharmacol 2018; 101:1-8. [DOI: 10.1016/j.vph.2017.11.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/12/2017] [Accepted: 11/14/2017] [Indexed: 12/19/2022]
|
85
|
Chen Y, Li J, Oupický D. Conjugate Polyplexes with Anti-Invasive Properties and Improved siRNA Delivery In Vivo. Bioconjug Chem 2018; 29:296-305. [PMID: 29338191 DOI: 10.1021/acs.bioconjchem.7b00622] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This study reports on a simple method to prepare siRNA-polycation conjugate polyplexes by in situ thiol-disulfide exchange reaction. The conjugate polyplexes are prepared using thiol-terminated siRNA and a bioreducible branched polycationic inhibitor of the CXCR4 chemokine receptor (rPAMD). The rPAMD-SS-siRNA conjugate polyplexes exhibit improved colloidal stability and resistance against disassembly with heparin, serum, and physiological salt concentrations when compared with control conventional rPAMD/siRNA polyplexes. Coating the polyplexes with human serum albumin masks the positive surface charge and contributes to the enhanced in vitro gene silencing and improved safety in vivo. The conjugate polyplexes display improved in vivo reporter gene silencing following intravenous injection in tumor-bearing mice. Because the conjugate polyplexes retained the ability of rPAMD to inhibit CXCR4 and restrict cancer cell invasion, the developed systems show promise for future combination anti-metastatic siRNA therapies of cancer.
Collapse
Affiliation(s)
- Yi Chen
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - Jing Li
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| | - David Oupický
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, University of Nebraska Medical Center , Omaha, Nebraska 68198, United States
| |
Collapse
|
86
|
Potter TM, Rodriguez JC, Neun BW, Ilinskaya AN, Cedrone E, Dobrovolskaia MA. In Vitro Assessment of Nanoparticle Effects on Blood Coagulation. Methods Mol Biol 2018; 1682:103-124. [PMID: 29039097 DOI: 10.1007/978-1-4939-7352-1_10] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Blood clotting is a complex process which involves both cellular and biochemical components. The key cellular players in the blood clotting process are thrombocytes or platelets. Other cells, including leukocytes and endothelial cells, contribute to clotting by expressing the so-called pro-coagulant activity (PCA) complex on their surface. The biochemical component of blood clotting is represented by the plasma coagulation cascade, which includes plasma proteins also known as coagulation factors. The coordinated interaction between platelets, leukocytes, endothelial cells, and plasma coagulation factors is necessary for maintaining hemostasis and for preventing excessive bleeding. Undesirable activation of all or some of these components may lead to pathological blood coagulation and life-threatening conditions such as consumptive coagulopathy or disseminated intravascular coagulation (DIC). In contrast, unintended inhibition of the coagulation pathways may lead to hemorrhage. Thrombogenicity is the property of a test material to induce blood coagulation by affecting one or more elements of the clotting process. Anticoagulant activity refers to the property of a test material to inhibit coagulation. The tendency to cause platelet aggregation, perturb plasma coagulation, and induce leukocyte PCA can serve as an in vitro measure of a nanomaterial's likelihood to be pro- or anticoagulant in vivo. This chapter describes three procedures for in vitro analyses of platelet aggregation, plasma coagulation time, and activation of leukocyte PCA. Platelet aggregation and plasma coagulation procedures have been described earlier. The revision here includes updated details about nanoparticle sample preparation, selection of nanoparticle concentration for the in vitro study, and updated details about assay controls. The chapter is expanded to describe a method for the leukocyte PCA analysis and case studies demonstrating the performance of these in vitro assays.
Collapse
Affiliation(s)
- Timothy M Potter
- Cancer Research Technology Program¸ Nanotechnology Characterization Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA
| | - Jamie C Rodriguez
- Cancer Research Technology Program¸ Nanotechnology Characterization Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA
| | - Barry W Neun
- Cancer Research Technology Program¸ Nanotechnology Characterization Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA
| | - Anna N Ilinskaya
- Cancer Research Technology Program¸ Nanotechnology Characterization Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA
| | - Edward Cedrone
- Cancer Research Technology Program¸ Nanotechnology Characterization Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA
| | - Marina A Dobrovolskaia
- Cancer Research Technology Program¸ Nanotechnology Characterization Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, P.O. Box B, Frederick, MD, 21702, USA.
| |
Collapse
|
87
|
Zia F, Kendall M, Watson SP, Mendes PM. Platelet aggregation induced by polystyrene and platinum nanoparticles is dependent on surface area. RSC Adv 2018; 8:37789-37794. [PMID: 30713685 PMCID: PMC6333253 DOI: 10.1039/c8ra07315e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 10/23/2018] [Indexed: 01/07/2023] Open
Abstract
Nanoparticles are key components underlying recent technological advances in various industrial and medical fields, and thus understanding their mode of interaction with biological systems is essential. However, while several nanoparticle systems have been shown to interact with blood platelets, many questions remain concerning the mechanisms of platelet activation and the role that the physicochemical properties of nanoparticles play in inducing platelet aggregation. Here, using negatively charged polystyrene nanoparticles with sizes of 25, 50, 119, 151, 201 nm and negatively charged platinum nanoparticles with sizes of 7 and 73 nm, we show that it is not the size of the nanoparticles but rather the nanoparticle surface area that is critical in mediating the effects on platelet activation. The nanoparticles stimulate platelet aggregation through passive (agglutination) and activation of integrin αIIbβ3 through a pathway regulated by Src and Syk tyrosine kinase. Nanoparticles are key components underlying recent technological advances in various industrial and medical fields, and thus understanding their mode of interaction with biological systems is essential.![]()
Collapse
Affiliation(s)
- Fatima Zia
- School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham B15 2TT, UK. .,Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, The Midlands, UK
| | - Michaela Kendall
- Adelan/School of Engineering, Aston University, Birmingham B4 7ET, UK. http://www.adelan.co.uk
| | - Steve P Watson
- Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, The Midlands, UK.,Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham B15 2TT, UK.
| | - Paula M Mendes
- School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham B15 2TT, UK. .,Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, The Midlands, UK
| |
Collapse
|
88
|
Abstract
Skin-mediated therapeutic delivery is a potential alternative to traditional drug delivery approaches. However, dermal drug delivery is limited to the molecules with optimal physico-chemical properties. To overcome this barrier for delivering ‘nonideal’ drug molecules across the skin, different drug carriers and penetration enhancement methods have been investigated. Conventional chemical and physical approaches for dermal drug delivery are limited by their skin irritation potential, complexity of application and poor patient compliance. In recent years, dendritic polymers have shown potential in improving the dermal delivery of various molecules. With minimal skin irritation potential and high drug loading capacity, dendrimers offer multiple advantages for improving delivery of drugs across the skin. The current review aims to provide an overview of dendritic polymers for dermal (topical and transdermal) drug delivery. [Formula: see text]
Collapse
|
89
|
In-vitro in-vivo correlation (IVIVC) in nanomedicine: Is protein corona the missing link? Biotechnol Adv 2017; 35:889-904. [DOI: 10.1016/j.biotechadv.2017.08.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/04/2017] [Accepted: 08/19/2017] [Indexed: 12/17/2022]
|
90
|
Kim H, Choi B, Lim H, Min H, Oh JH, Choi S, Cho JG, Park JS, Lee SJ. Polyamidoamine dendrimer-conjugated triamcinolone acetonide attenuates nerve injury-induced spinal cord microglia activation and mechanical allodynia. Mol Pain 2017; 13:1744806917697006. [PMID: 28326946 PMCID: PMC5407664 DOI: 10.1177/1744806917697006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Background Accumulating evidence on the causal role of spinal cord microglia activation in the development of neuropathic pain after peripheral nerve injury suggests that microglial activation inhibitors might be useful analgesics for neuropathic pain. Studies also have shown that polyamidoamine dendrimer may function as a drug delivery vehicle to microglia in the central nervous system. In this regard, we developed polyamidoamine dendrimer-conjugated triamcinolone acetonide, a previously identified microglial activation inhibitor, and tested its analgesic efficacy in a mouse peripheral nerve injury model. Result Polyamidoamine dendrimer was delivered selectively to spinal cord microglia upon intrathecal administration. Dendrimer-conjugated triamcinolone acetonide inhibited lipoteichoic acid-induced proinflammatory gene expression in primary glial cells. In addition, dendrimer-conjugated triamcinolone acetonide administration (intrathecal) inhibited peripheral nerve injury-induced spinal cord microglial activation and the expression of pain-related genes in the spinal cord, including Nox2, IL-1β, TNF-α, and IL-6. Dendrimer-conjugated triamcinolone acetonide administration right after nerve injury almost completely reversed peripheral nerve injury-induced mechanical allodynia for up to three days. Meanwhile, dendrimer-conjugated triamcinolone acetonide administration 1.5 days post injury significantly attenuated mechanical allodynia. Conclusion Our data demonstrate that dendrimer-conjugated triamcinolone acetonide inhibits spinal cord microglia activation and attenuates neuropathic pain after peripheral nerve injury, which has therapeutic implications for the treatment of neuropathic pain.
Collapse
Affiliation(s)
- Hwisung Kim
- 1 Department of Neuroscience and Physiology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Boomin Choi
- 1 Department of Neuroscience and Physiology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Hyoungsub Lim
- 1 Department of Neuroscience and Physiology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Hyunjung Min
- 1 Department of Neuroscience and Physiology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Jae Hoon Oh
- 2 School of Chemistry and Molecular Engineering, Seoul National University, Seoul, Republic of Korea
| | - Sunghyun Choi
- 2 School of Chemistry and Molecular Engineering, Seoul National University, Seoul, Republic of Korea
| | - Joung Goo Cho
- 3 Department of Anesthesiology and Pain Medicine, National Health Insurance Service Ilsan Hospital, Ilsan, Republic of Korea
| | - Jong-Sang Park
- 2 School of Chemistry and Molecular Engineering, Seoul National University, Seoul, Republic of Korea
| | - Sung Joong Lee
- 1 Department of Neuroscience and Physiology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| |
Collapse
|
91
|
Ganda IS, Zhong Q, Hali M, Albuquerque RLC, Padilha FF, da Rocha SRP, Whittum-Hudson JA. Dendrimer-conjugated peptide vaccine enhances clearance of Chlamydia trachomatis genital infection. Int J Pharm 2017; 527:79-91. [PMID: 28546072 PMCID: PMC5522616 DOI: 10.1016/j.ijpharm.2017.05.045] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 05/07/2017] [Accepted: 05/21/2017] [Indexed: 12/12/2022]
Abstract
Peptide-based vaccines have emerged in recent years as promising candidates in the prevention of infectious diseases. However, there are many challenges to maintaining in vivo peptide stability and enhancement of peptide immunogenicity to generate protective immunity which enhances clearance of infections. Here, a dendrimer-based carrier system is proposed for peptide-based vaccine delivery, and shows its anti-microbial feasibility in a mouse model of Chlamydia trachomatis. Chlamydiae are the most prevalent sexually transmitted bacteria worldwide, and also the causal agent of trachoma, the leading cause of preventable infectious blindness. In spite of the prevalence of this infectious agent and the many previous vaccine-related studies, there is no vaccine commercially available. The carrier system proposed consists of generation 4, hydroxyl-terminated, polyamidoamine (PAMAM) dendrimers (G4OH), to which a peptide mimic of a chlamydial glycolipid antigen-Peptide 4 (Pep4, AFPQFRSATLLL) was conjugated through an ester bond. The ester bond between G4OH and Pep4 is expected to break down mainly in the intracellular environment for antigen presentation. Pep4 conjugated to dendrimer induced Chlamydia-specific serum antibodies after subcutaneous immunizations. Further, this new vaccine formulation significantly protected immunized animals from vaginal challenge with infectious Chlamydia trachomatis, and it reduced infectious loads and tissue (genital tract) damage. Pep4 conjugated to G4OH or only mixed with peptide provided enhanced protection compared to Pep4 and adjuvant (i.e. alum), suggesting a potential adjuvant effect of the PAMAM dendrimer. Combined, these results demonstrate that hydroxyl-terminated PAMAM dendrimer is a promising polymeric nanocarrier platform for the delivery of peptide vaccines and this approach has potential to be expanded to other infectious intracellular bacteria and viruses of public health significance.
Collapse
Affiliation(s)
- Ingrid S Ganda
- Biomaterials Laboratory, Technology and Research Institute, Tiradentes University, Aracaju, SE, 49032-490, Brazil; Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI 48202, USA; Departments of Immunology and Microbiology, Internal Medicine (Rheumatology), and Ophthalmology, School of Medicine, Wayne State University, Detroit, MI 48201, USA.
| | - Qian Zhong
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI 48202, USA.
| | - Mirabela Hali
- Departments of Immunology and Microbiology, Internal Medicine (Rheumatology), and Ophthalmology, School of Medicine, Wayne State University, Detroit, MI 48201, USA.
| | - Ricardo L C Albuquerque
- Laboratory of Morphology and Structural Biology, Technology and Research Institute, Tiradentes University, Aracaju, SE, 49032-490, Brazil.
| | - Francine F Padilha
- Biomaterials Laboratory, Technology and Research Institute, Tiradentes University, Aracaju, SE, 49032-490, Brazil.
| | - Sandro R P da Rocha
- Biomaterials Laboratory, Technology and Research Institute, Tiradentes University, Aracaju, SE, 49032-490, Brazil; Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI 48202, USA.
| | - Judith A Whittum-Hudson
- Departments of Immunology and Microbiology, Internal Medicine (Rheumatology), and Ophthalmology, School of Medicine, Wayne State University, Detroit, MI 48201, USA.
| |
Collapse
|
92
|
Hajjarian Z, Tshikudi DM, Nadkarni SK. Evaluating platelet aggregation dynamics from laser speckle fluctuations. BIOMEDICAL OPTICS EXPRESS 2017; 8:3502-3515. [PMID: 28717586 PMCID: PMC5508847 DOI: 10.1364/boe.8.003502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 06/25/2017] [Indexed: 05/16/2023]
Abstract
Platelets are key to maintaining hemostasis and impaired platelet aggregation could lead to hemorrhage or thrombosis. We report a new approach that exploits laser speckle intensity fluctuations, emanated from a drop of platelet-rich-plasma (PRP), to profile aggregation. Speckle fluctuation rate is quantified by the speckle intensity autocorrelation, g2(t), from which the aggregate size is deduced. We first apply this approach to evaluate polystyrene bead aggregation, triggered by salt. Next, we assess dose-dependent platelet aggregation and inhibition in human PRP spiked with adenosine diphosphate and clopidogrel. Additional spatio-temporal speckle analyses yield 2-dimensional maps of particle displacements to visualize platelet aggregate foci within minutes and quantify aggregation dynamics. These findings demonstrate the unique opportunity for assessing platelet health within minutes for diagnosing bleeding disorders and monitoring anti-platelet therapies.
Collapse
|
93
|
Glass JJ, Li Y, De Rose R, Johnston APR, Czuba EI, Khor SY, Quinn JF, Whittaker MR, Davis TP, Kent SJ. Thiol-Reactive Star Polymers Display Enhanced Association with Distinct Human Blood Components. ACS APPLIED MATERIALS & INTERFACES 2017; 9:12182-12194. [PMID: 28338321 DOI: 10.1021/acsami.6b15942] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Directing nanoparticles to specific cell types using nonantibody-based methods is of increasing interest. Thiol-reactive nanoparticles can enhance the efficiency of cargo delivery into specific cells through interactions with cell-surface proteins. However, studies to date using this technique have been largely limited to immortalized cell lines or rodents, and the utility of this technology on primary human cells is unknown. Herein, we used RAFT polymerization to prepare pyridyl disulfide (PDS)-functionalized star polymers with a methoxy-poly(ethylene glycol) brush corona and a fluorescently labeled cross-linked core using an arm-first method. PDS star polymers were examined for their interaction with primary human blood components: six separate white blood cell subsets, as well as red blood cells and platelets. Compared with control star polymers, thiol-reactive nanoparticles displayed enhanced association with white blood cells at 37 °C, particularly the phagocytic monocyte, granulocyte, and dendritic cell subsets. Platelets associated with more PDS than control nanoparticles at both 37 °C and on ice, but they were not activated in the duration examined. Association with red blood cells was minor but still enhanced with PDS nanoparticles. Thiol-reactive nanoparticles represent a useful strategy to target primary human immune cell subsets for improved nanoparticle delivery.
Collapse
Affiliation(s)
- Joshua J Glass
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Yang Li
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Robert De Rose
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Angus P R Johnston
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Ewa I Czuba
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Song Yang Khor
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - John F Quinn
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Michael R Whittaker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
- Department of Chemistry, University of Warwick , Gibbet Hill, Coventry CV4 7AL, United Kingdom
| | - Stephen J Kent
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne , Melbourne, Victoria 3010, Australia
- Melbourne Sexual Health Centre and Department of Infectious Diseases, Alfred Health, Central Clinical School, Monash University , Melbourne, Victoria 3800, Australia
| |
Collapse
|
94
|
Zeng Y, Kurokawa Y, Win-Shwe TT, Zeng Q, Hirano S, Zhang Z, Sone H. Effects of PAMAM dendrimers with various surface functional groups and multiple generations on cytotoxicity and neuronal differentiation using human neural progenitor cells. J Toxicol Sci 2017; 41:351-70. [PMID: 27193728 DOI: 10.2131/jts.41.351] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Polyamidoamine (PAMAM) dendrimers have potential for biological applications as delivery systems for genes, drugs, and imaging agents into the brain, but their developmental neurotoxicity remains unknown. We investigated the effects of PAMAM dendrimers with various surface functional groups and multiple generations on neuronal differentiation using human neural progenitor cells at an equal mass concentration. Only PAMAM dendrimers containing amine (NH2) surface groups at concentrations of 10 μg/mL significantly reduced cell viability and neuronal differentiation, compared with non-amine-terminated dendrimers. PAMAM-NH2 with generation (G)3, G4, G5 G6, and G7 significantly decreased cell viability and inhibited neuronal differentiation from a concentration of 5 μg/mL, but G0, G1, and G2 dendrimers did not have any effect at this concentration. Cytotoxicity indices of PAMAM-NH2 dendrimers at 10 μg/mL correlated well with the zeta potentials of the particles. Surface group density and particle number in unit volume is more important characteristic than particle size to influence cytotoxicity for positive changed dendrimers. PAMAM-50% C12 at 1 μg/mL altered the expression level of the oxidative stress-related genes, ROR1, CYP26A1, and TGFB1, which is a DNA damage response gene. Our results indicate that PAMAM dendrimer exposure may have a surface charge-dependent adverse effect on neuronal differentiation, and that the effect may be associated with oxidative stress and DNA damage during development of neural cells.
Collapse
Affiliation(s)
- Yang Zeng
- Center for Environmental Risk Research, National Institute for Environmental Studies
| | | | | | | | | | | | | |
Collapse
|
95
|
Fuentes E, Yameen B, Bong SJ, Salvador-Morales C, Palomo I, Vilos C. Antiplatelet effect of differentially charged PEGylated lipid-polymer nanoparticles. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:1089-1094. [DOI: 10.1016/j.nano.2016.10.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 09/30/2016] [Accepted: 10/15/2016] [Indexed: 10/20/2022]
|
96
|
Cheah HY, Kiew LV, Lee HB, Japundžić-Žigon N, Vicent MJ, Hoe SZ, Chung LY. Preclinical safety assessments of nano-sized constructs on cardiovascular system toxicity: A case for telemetry. J Appl Toxicol 2017; 37:1268-1285. [DOI: 10.1002/jat.3437] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/14/2016] [Accepted: 12/14/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Hoay Yan Cheah
- Department of Pharmacology, Faculty of Medicine; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Lik Voon Kiew
- Department of Pharmacology, Faculty of Medicine; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Hong Boon Lee
- Department of Pharmacy, Faculty of Medicine; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Nina Japundžić-Žigon
- Institute of Pharmacology, Clinical Pharmacology and Toxicology, School of Medicine; University of Belgrade; Republic of Serbia
| | - Marίa J. Vicent
- Polymer Therapeutics Lab; Centro de Investigación Príncipe Felipe; Av. Eduardo Primo Yúfera 3 E-46012 Valencia Spain
| | - See Ziau Hoe
- Department of Physiology, Faculty of Medicine; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Lip Yong Chung
- Department of Pharmacy, Faculty of Medicine; University of Malaya; 50603 Kuala Lumpur Malaysia
| |
Collapse
|
97
|
Simak J, De Paoli S. The effects of nanomaterials on blood coagulation in hemostasis and thrombosis. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2017; 9. [PMID: 28078811 DOI: 10.1002/wnan.1448] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 10/19/2016] [Accepted: 11/23/2016] [Indexed: 01/16/2023]
Abstract
The blood coagulation balance in the organism is achieved by the interaction of the blood platelets (PLTs) with the plasma coagulation system (PCS) and the vascular endothelial cells. In healthy organism, these systems prevent thrombosis and, in events of vascular damage, enable blood clotting to stop bleeding. The dysregulation of hemostasis may cause serious thrombotic and/or hemorrhagic pathologies. Numerous engineered nanomaterials are being investigated for biomedical purposes and are unavoidably exposed to the blood. Also, nanomaterials may access vascular system after occupational, environmental, or other types of exposure. Thus, it is essential to evaluate the effects of engineered nanomaterials on hemostasis. This review focuses on investigations of nanomaterial interactions with the blood components involved in blood coagulation: the PCS and PLTs. Particular emphases include the pathophysiology of effects of nanomaterials on the PCS, including the kallikrein-kinin system, and on PLTs. Methods for investigating these interactions are briefly described, and a review of the most important studies on the interactions of nanomaterials with plasma coagulation and platelets is provided. WIREs Nanomed Nanobiotechnol 2017, 9:e1448. doi: 10.1002/wnan.1448 For further resources related to this article, please visit the WIREs website.
Collapse
Affiliation(s)
- Jan Simak
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| | - Silvia De Paoli
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, USA
| |
Collapse
|
98
|
Parsian M, Mutlu P, Yalcin S, Tezcaner A, Gunduz U. Half generations magnetic PAMAM dendrimers as an effective system for targeted gemcitabine delivery. Int J Pharm 2016; 515:104-113. [DOI: 10.1016/j.ijpharm.2016.10.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 11/17/2022]
|
99
|
Márquez-Miranda V, Peñaloza JP, Araya-Durán I, Reyes R, Vidaurre S, Romero V, Fuentes J, Céric F, Velásquez L, González-Nilo FD, Otero C. Effect of Terminal Groups of Dendrimers in the Complexation with Antisense Oligonucleotides and Cell Uptake. NANOSCALE RESEARCH LETTERS 2016; 11:66. [PMID: 26847692 PMCID: PMC4742457 DOI: 10.1186/s11671-016-1260-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 01/09/2016] [Indexed: 06/05/2023]
Abstract
Poly(amidoamine) dendrimers are the most recognized class of dendrimer. Amino-terminated (PAMAM-NH2) and hydroxyl-terminated (PAMAM-OH) dendrimers of generation 4 are widely used, since they are commercially available. Both have different properties, mainly based on their different overall charges at physiological pH. Currently, an important function of dendrimers as carriers of short single-stranded DNA has been applied. These molecules, known as antisense oligonucleotides (asODNs), are able to inhibit the expression of a target mRNA. Whereas PAMAM-NH2 dendrimers have shown to be able to transfect plasmid DNA, PAMAM-OH dendrimers have not shown the same successful results. However, little is known about their interaction with shorter and more flexible molecules such as asODNs. Due to several initiatives, the use of these neutral dendrimers as a scaffold to introduce other functional groups has been proposed. Because of its low cytotoxicity, it is relevant to understand the molecular phenomena involving these types of dendrimers. In this work, we studied the behavior of an antisense oligonucleotide in presence of both types of dendrimers using molecular dynamics simulations, in order to elucidate if they are able to form stable complexes. In this manner, we demonstrated at atomic level that PAMAM-NH2, unlike PAMAM-OH, could form a well-compacted complex with asODN, albeit PAMAM-OH can also establish stable interactions with the oligonucleotide. The biological activity of asODN in complex with PAMAM-NH2 dendrimer was also shown. Finally, we revealed that in contact with PAMAM-OH, asODN remains outside the cells as TIRF microscopy results showed, due to its poor interaction with this dendrimer and cell membranes.
Collapse
Affiliation(s)
- Valeria Márquez-Miranda
- Facultad de Biología, Center for Bioinformatics and Integrative Biology (CBIB), Universidad Andres Bello, Republica 239, Santiago, Chile
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile
| | - Juan Pablo Peñaloza
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile
| | - Ingrid Araya-Durán
- Facultad de Biología, Center for Bioinformatics and Integrative Biology (CBIB), Universidad Andres Bello, Republica 239, Santiago, Chile
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile
| | - Rodrigo Reyes
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile
| | - Soledad Vidaurre
- Departamento Ciencias Químicas y Biológicas, Laboratorio de Bionanotecnología, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Valentina Romero
- Departamento Ciencias Químicas y Biológicas, Laboratorio de Bionanotecnología, Universidad Bernardo O'Higgins, Santiago, Chile
| | - Juan Fuentes
- Facultad de Biología, Laboratorio de Microbiología, Universidad Andres Bello, Republica 217, Santiago, Chile
| | - Francisco Céric
- Laboratorio de Neurociencias Cognitivas, Facultad de Psicología, Universidad del Desarrollo, Santiago, Chile
| | - Luis Velásquez
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile
| | - Fernando D González-Nilo
- Facultad de Biología, Center for Bioinformatics and Integrative Biology (CBIB), Universidad Andres Bello, Republica 239, Santiago, Chile.
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile.
- Centro Interdisciplinario de Neurociencia de Valparaíso, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile.
| | - Carolina Otero
- Fundación Fraunhofer Chile Research, M. Sánchez Fontecilla 310 piso 14, Las Condes, Chile.
- Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Universidad Andres Bello, Santiago, Chile.
| |
Collapse
|
100
|
Impact of Dendrimer Terminal Group Chemistry on Blockage of the Anthrax Toxin Channel: A Single Molecule Study. Toxins (Basel) 2016; 8:toxins8110337. [PMID: 27854272 PMCID: PMC5127133 DOI: 10.3390/toxins8110337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 11/07/2016] [Accepted: 11/07/2016] [Indexed: 12/19/2022] Open
Abstract
Nearly all the cationic molecules tested so far have been shown to reversibly block K⁺ current through the cation-selective PA63 channels of anthrax toxin in a wide nM-mM range of effective concentrations. A significant increase in channel-blocking activity of the cationic compounds was achieved when multiple copies of positively charged ligands were covalently linked to multivalent scaffolds, such as cyclodextrins and dendrimers. Even though multivalent binding can be strong when the individual bonds are relatively weak, for drug discovery purposes we often strive to design multivalent compounds with high individual functional group affinity toward the respective binding site on a multivalent target. Keeping this requirement in mind, here we perform a single-channel/single-molecule study to investigate kinetic parameters of anthrax toxin PA63 channel blockage by second-generation (G2) poly(amido amine) (PAMAM) dendrimers functionalized with different surface ligands, including G2-NH₂, G2-OH, G2-succinamate, and G2-COONa. We found that the previously reported difference in IC50 values of the G2-OH/PA63 and G2-NH₂/PA63 binding was determined by both on- and off-rates of the reversible dendrimer/channel binding reaction. In 1 M KCl, we observed a decrease of about three folds in k o n and a decrease of only about ten times in t r e s with G2-OH compared to G2-NH₂. At the same time for both blockers, k o n and t r e s increased dramatically with transmembrane voltage increase. PAMAM dendrimers functionalized with negatively charged succinamate, but not carboxyl surface groups, still had some residual activity in inhibiting the anthrax toxin channels. At 100 mV, the on-rate of the G2-succinamate binding was comparable with that of G2-OH but showed weaker voltage dependence when compared to G2-OH and G2-NH₂. The residence time of G2-succinamate in the channel exhibited opposite voltage dependence compared to G2-OH and G2-NH₂, increasing with the cis-negative voltage increase. We also describe kinetics of the PA63 ion current modulation by two different types of the "imperfect" PAMAM dendrimers, the mixed-surface G2 75% OH 25% NH₂ dendrimer and G3-NH₂ dendron. At low voltages, both "imperfect" dendrimers show similar rate constants but significantly weaker voltage sensitivity when compared with the intact G2-NH₂ PAMAM dendrimer.
Collapse
|