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Kojima C, Sawada M, Nakase I, Matsumoto A. Gene Delivery into T-Cells Using Ternary Complexes of DNA, Lipofectamine, and Carboxy-Terminal Phenylalanine-Modified Dendrimers. Macromol Biosci 2023; 23:e2300139. [PMID: 37285588 DOI: 10.1002/mabi.202300139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/05/2023] [Indexed: 06/09/2023]
Abstract
T-cells play critical roles in various immune reactions, and genetically engineered T-cells have attracted attention for the treatment of cancer and autoimmune diseases. Previously, it is shown that a polyamidoamine dendrimer of generation 4 (G4), modified with 1,2-cyclohexanedicarboxylic anhydride (CHex) and phenylalanine (Phe) (G4-CHex-Phe), is useful for delivery into T-cells and their subsets. In this study, an efficient non-viral gene delivery system is constructed using this dendrimer. Ternary complexes are prepared using different ratios of plasmid DNA, Lipofectamine, and G4-CHex-Phe. A carboxy-terminal dendrimer lacking Phe (G3.5) is used for comparison. These complexes are characterized using agarose gel electrophoresis, dynamic light scattering, and ζpotential measurements. In Jurkat cells, the ternary complex with G4-CHex-Phe at a P/COOH ratio of 1/5 shows higher transfection activity than other complexes, such as binary and ternary complexes with G3.5, without any significant cytotoxicity. The transfection efficiency of the G4-CHex-Phe ternary complexes decreases considerably in the presence of free G4-CHex-Phe and upon altering the complex preparation method. These results suggest that G4-CHex-Phe promotes the cellular internalization of the complexes, which is useful for gene delivery into T-cells.
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Affiliation(s)
- Chie Kojima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Mei Sawada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Ikuhiko Nakase
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
| | - Akikazu Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan
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2
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Yuba E, Sugahara Y, Yoshizaki Y, Shimizu T, Kasai M, Udaka K, Kono K. Carboxylated polyamidoamine dendron-bearing lipid-based assemblies for precise control of intracellular fate of cargo and induction of antigen-specific immune responses. Biomater Sci 2021; 9:3076-3089. [PMID: 33681873 DOI: 10.1039/d0bm01813a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For the establishment of advanced medicines such as cancer immunotherapy, high performance carriers that precisely deliver biologically active molecules must be developed to target organelles of the cells and to release their contents there. From the viewpoint of antigen delivery, endosomes are important target organelles because they contain immune-response-related receptors and proteins of various types. To obtain carriers for precision endosome delivery, a novel type of polyamidoamine dendron-based lipid having pH-sensitive terminal groups was synthesized for this study. Liposomes were prepared using these pH-sensitive dendron-based lipids and egg yolk phosphatidylcholine. Their pH-responsive properties and performance as an endosome delivery carrier were investigated. pH-Sensitive dendron lipid-based liposomes retained water-soluble molecules at neutral pH but released them under weakly acidic conditions. Particularly, liposomes containing CHexDL-G1U exhibited highly sensitive properties responding to very weakly acidic pH. These dendron lipid-based liposomes released the contents specifically in the endosome. The timing of content release can be controlled by selecting pH-sensitive dendron lipids for liposome preparation. Significant tumor regression was induced in tumor-bearing mice by the administration of CHexDL-G1U-modified liposomes containing the model antigenic protein. Furthermore, CHexDL-G1U-modified liposomes induced WT1 tumor antigenic peptide-specific helper T cell proliferation. The results demonstrate that dendron lipid-based liposomes are useful as a potent vaccine for cancer immunotherapy.
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Affiliation(s)
- Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
| | - Yoshikatsu Sugahara
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
| | - Yuta Yoshizaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
| | - Takeyuki Shimizu
- Department of Immunology, School of Medicine, Kochi University, Nankoku, Kochi 7838505, Japan
| | - Michiyuki Kasai
- Department of Immunology, School of Medicine, Kochi University, Nankoku, Kochi 7838505, Japan
| | - Keiko Udaka
- Department of Immunology, School of Medicine, Kochi University, Nankoku, Kochi 7838505, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
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3
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Spanedda MV, Bourel-Bonnet L. Cyclic Anhydrides as Powerful Tools for Bioconjugation and Smart Delivery. Bioconjug Chem 2021; 32:482-496. [PMID: 33662203 DOI: 10.1021/acs.bioconjchem.1c00023] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cyclic anhydrides are potent tools for bioconjugation; therefore, they are broadly used in the functionalization of biomolecules and carriers. The pH-dependent stability and reactivity, as well as the physical properties, can be tuned by the structure of the cyclic anhydride used; thus, their application in smart delivery systems has become very important. This review intends to cover the last updates in the use of cyclic anhydrides as pH-sensitive linkers, their differences in reactivity, and the latest applications found in bioconjugation chemistry or chemical biology, and when possible, in drug delivery.
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Affiliation(s)
- Maria Vittoria Spanedda
- Laboratoire de Conception et Application de Molécules Bioactives, 3Bio team, ITI InnoVec, UMR 7199 - CNRS/Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, BP 60024, 67401 Illkirch Cedex, France
| | - Line Bourel-Bonnet
- Laboratoire de Conception et Application de Molécules Bioactives, 3Bio team, ITI InnoVec, UMR 7199 - CNRS/Université de Strasbourg, Faculté de Pharmacie, 74 route du Rhin, BP 60024, 67401 Illkirch Cedex, France
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4
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Dailing EA, Kilchrist KV, Tierney JW, Fletcher RB, Evans BC, Duvall CL. Modifying Cell Membranes with Anionic Polymer Amphiphiles Potentiates Intracellular Delivery of Cationic Peptides. ACS APPLIED MATERIALS & INTERFACES 2020; 12:50222-50235. [PMID: 33124813 PMCID: PMC9082340 DOI: 10.1021/acsami.0c13304] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Rapid, facile, and noncovalent cell membrane modification with alkyl-grafted anionic polymers was sought as an approach to enhance intracellular delivery and bioactivity of cationic peptides. We synthesized a library of acrylic acid-based copolymers containing varying amounts of an amine-reactive pentafluorophenyl acrylate monomer followed by postpolymerization modification with a series of alkyl amines to afford precise control over the length and density of aliphatic alkyl side chains. This synthetic strategy enabled systematic investigation of the effect of the polymer structure on membrane binding, potentiation of peptide cell uptake, pH-dependent disruption of lipid bilayers for endosome escape, and intracellular bioavailability. A subset of these polymers exhibited pKa of ∼6.8, which facilitated stable membrane association at physiological pH and rapid, pH-dependent endosomal disruption upon endocytosis as quantified in Galectin-8-YFP reporter cells. Cationic cell penetrating peptide (CPP) uptake was enhanced up to 15-fold in vascular smooth muscle cells in vitro when peptide treatment was preceded by a 30-min pretreatment with lead candidate polymers. We also designed and implemented a new and highly sensitive assay for measuring the intracellular bioavailability of CPPs based on the NanoLuciferase (NanoLuc) technology previously developed for measuring intracellular protein-protein interactions. Using this split luciferase class of assay, polymer pretreatment enhanced intracellular delivery of the CPP-modified HiBiT peptide up to 30-fold relative to CPP-HiBiT without polymer pretreatment (p < 0.05). The overall structural analyses show that polymers containing 50:50 or 70:30 molar ratios of carboxyl groups to alkyl side chains of 6-8 carbons maximized peptide uptake, pH-dependent membrane disruption, and intracellular bioavailability and that this potentiation effect was maximized by pairing with CPPs with high cationic charge density. These results demonstrate a rapid, mild method for polymer modification of cell surfaces to potentiate intracellular delivery, endosome escape, and bioactivity of cationic peptides.
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Affiliation(s)
- Eric A Dailing
- Department of Biomedical Engineering, Vanderbilt University, PMB 351634, Nashville, Tennessee 37235, United States
| | - Kameron V Kilchrist
- Department of Biomedical Engineering, Vanderbilt University, PMB 351634, Nashville, Tennessee 37235, United States
| | - J William Tierney
- Department of Biomedical Engineering, Vanderbilt University, PMB 351634, Nashville, Tennessee 37235, United States
| | - R Brock Fletcher
- Department of Biomedical Engineering, Vanderbilt University, PMB 351634, Nashville, Tennessee 37235, United States
| | - Brian C Evans
- Department of Biomedical Engineering, Vanderbilt University, PMB 351634, Nashville, Tennessee 37235, United States
| | - Craig L Duvall
- Department of Biomedical Engineering, Vanderbilt University, PMB 351634, Nashville, Tennessee 37235, United States
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5
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Gu Z, Da Silva CG, Van der Maaden K, Ossendorp F, Cruz LJ. Liposome-Based Drug Delivery Systems in Cancer Immunotherapy. Pharmaceutics 2020; 12:E1054. [PMID: 33158166 PMCID: PMC7694212 DOI: 10.3390/pharmaceutics12111054] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 02/07/2023] Open
Abstract
Cancer immunotherapy has shown remarkable progress in recent years. Nanocarriers, such as liposomes, have favorable advantages with the potential to further improve cancer immunotherapy and even stronger immune responses by improving cell type-specific delivery and enhancing drug efficacy. Liposomes can offer solutions to common problems faced by several cancer immunotherapies, including the following: (1) Vaccination: Liposomes can improve the delivery of antigens and other stimulatory molecules to antigen-presenting cells or T cells; (2) Tumor normalization: Liposomes can deliver drugs selectively to the tumor microenvironment to overcome the immune-suppressive state; (3) Rewiring of tumor signaling: Liposomes can be used for the delivery of specific drugs to specific cell types to correct or modulate pathways to facilitate better anti-tumor immune responses; (4) Combinational therapy: Liposomes are ideal vehicles for the simultaneous delivery of drugs to be combined with other therapies, including chemotherapy, radiotherapy, and phototherapy. In this review, different liposomal systems specifically developed for immunomodulation in cancer are summarized and discussed.
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Affiliation(s)
- Zili Gu
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; (Z.G.); (C.G.D.S.)
| | - Candido G. Da Silva
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; (Z.G.); (C.G.D.S.)
| | - Koen Van der Maaden
- Tumor Immunology Group, Department of Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; (K.v.d.M.); (F.O.)
- TECOdevelopment GmbH, 53359 Rheinbach, Germany
| | - Ferry Ossendorp
- Tumor Immunology Group, Department of Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; (K.v.d.M.); (F.O.)
| | - Luis J. Cruz
- Department of Radiology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands; (Z.G.); (C.G.D.S.)
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6
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Li K, Chen F, Wang Y, Stenzel MH, Chapman R. Polyion Complex Micelles for Protein Delivery Benefit from Flexible Hydrophobic Spacers in the Binding Group. Macromol Rapid Commun 2020; 41:e2000208. [DOI: 10.1002/marc.202000208] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/19/2020] [Accepted: 05/25/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Kecheng Li
- K. Li, F. Chen, Y. Wang, M. H. Stenzel, R. Chapman Centre for Advanced Macromolecular Design (CAMD) School of Chemistry University of New South Wales (UNSW Sydney) Australia
| | - Fan Chen
- K. Li, F. Chen, Y. Wang, M. H. Stenzel, R. Chapman Centre for Advanced Macromolecular Design (CAMD) School of Chemistry University of New South Wales (UNSW Sydney) Australia
| | - Yiping Wang
- K. Li, F. Chen, Y. Wang, M. H. Stenzel, R. Chapman Centre for Advanced Macromolecular Design (CAMD) School of Chemistry University of New South Wales (UNSW Sydney) Australia
| | - Martina H. Stenzel
- K. Li, F. Chen, Y. Wang, M. H. Stenzel, R. Chapman Centre for Advanced Macromolecular Design (CAMD) School of Chemistry University of New South Wales (UNSW Sydney) Australia
| | - Robert Chapman
- K. Li, F. Chen, Y. Wang, M. H. Stenzel, R. Chapman Centre for Advanced Macromolecular Design (CAMD) School of Chemistry University of New South Wales (UNSW Sydney) Australia
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7
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Askari E, Seyfoori A, Amereh M, Gharaie SS, Ghazali HS, Ghazali ZS, Khunjush B, Akbari M. Stimuli-Responsive Hydrogels for Local Post-Surgical Drug Delivery. Gels 2020; 6:E14. [PMID: 32397180 PMCID: PMC7345431 DOI: 10.3390/gels6020014] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/28/2020] [Accepted: 04/30/2020] [Indexed: 02/06/2023] Open
Abstract
Currently, surgical operations, followed by systemic drug delivery, are the prevailing treatment modality for most diseases, including cancers and trauma-based injuries. Although effective to some extent, the side effects of surgery include inflammation, pain, a lower rate of tissue regeneration, disease recurrence, and the non-specific toxicity of chemotherapies, which remain significant clinical challenges. The localized delivery of therapeutics has recently emerged as an alternative to systemic therapy, which not only allows the delivery of higher doses of therapeutic agents to the surgical site, but also enables overcoming post-surgical complications, such as infections, inflammations, and pain. Due to the limitations of the current drug delivery systems, and an increasing clinical need for disease-specific drug release systems, hydrogels have attracted considerable interest, due to their unique properties, including a high capacity for drug loading, as well as a sustained release profile. Hydrogels can be used as local drug performance carriers as a means for diminishing the side effects of current systemic drug delivery methods and are suitable for the majority of surgery-based injuries. This work summarizes recent advances in hydrogel-based drug delivery systems (DDSs), including formulations such as implantable, injectable, and sprayable hydrogels, with a particular emphasis on stimuli-responsive materials. Moreover, clinical applications and future opportunities for this type of post-surgery treatment are also highlighted.
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Affiliation(s)
- Esfandyar Askari
- Biomaterials and Tissue Engineering Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran P.O. Box 1517964311, Iran;
| | - Amir Seyfoori
- Laboratory for Innovations in Micro Engineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada; (A.S.); (M.A.); (S.S.G.); (B.K.)
| | - Meitham Amereh
- Laboratory for Innovations in Micro Engineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada; (A.S.); (M.A.); (S.S.G.); (B.K.)
| | - Sadaf Samimi Gharaie
- Laboratory for Innovations in Micro Engineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada; (A.S.); (M.A.); (S.S.G.); (B.K.)
| | - Hanieh Sadat Ghazali
- Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology, Tehran P.O. Box 16846-13114, Iran;
| | - Zahra Sadat Ghazali
- Biomedical Engineering Department, Amirkabir University of Technology (AUT), Tehran P.O. Box 158754413, Iran;
| | - Bardia Khunjush
- Laboratory for Innovations in Micro Engineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada; (A.S.); (M.A.); (S.S.G.); (B.K.)
| | - Mohsen Akbari
- Laboratory for Innovations in Micro Engineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada; (A.S.); (M.A.); (S.S.G.); (B.K.)
- Center for Biomedical Research, University of Victoria, Victoria, BC V8P 5C2, Canada
- Center for Advanced Materials and Related Technologies, University of Victoria, Victoria, BC V8P 5C2, Canada
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8
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Hiruta Y, Sawada K, Mizui Y, Citterio D. pH-Responsive Tunable Mixed-Charge Polymers for pH-Selective Interaction with Anionic Biological Constituents. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuki Hiruta
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Kazuki Sawada
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Yuki Mizui
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Daniel Citterio
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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9
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Rayamajhi S, Marchitto J, Nguyen TDT, Marasini R, Celia C, Aryal S. pH-responsive cationic liposome for endosomal escape mediated drug delivery. Colloids Surf B Biointerfaces 2020; 188:110804. [DOI: 10.1016/j.colsurfb.2020.110804] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/08/2020] [Accepted: 01/15/2020] [Indexed: 11/29/2022]
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10
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Yuba E. Development of functional liposomes by modification of stimuli-responsive materials and their biomedical applications. J Mater Chem B 2020; 8:1093-1107. [PMID: 31960007 DOI: 10.1039/c9tb02470k] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Liposomes are a promising nanocarrier for drug delivery because of their biocompatibility and the encapsulation capacity of drugs. Liposomes can be functionalized easily by introduction of functional materials such as stimulus-responsive materials. Temperature-responsive liposomes and pH-responsive liposomes are representative stimulus-responsive liposomes that can deliver drugs to locally heated target tissues and intracellular organelles. Here, temperature-responsive liposomes for the selective release of cargo and pH-responsive liposomes for the induction of antigen-specific immunity are overviewed. Temperature-responsive polymer-modified liposomes immediately released drugs in response to heating, which achieved selective drug release at a tumour after topical heating of tumour-bearing mice. Introduction of MR-detectable molecules enabled the tracing of liposome accumulation into target sites to optimize the heating timing. These liposomes can also be combined with magnetic nanoparticles or carbon nanomaterials to attain magnetic field-responsive, electric field-responsive and light-responsive properties to support on-demand drug release or control of biological reactions using these external stimuli. pH-Responsive liposomes were produced by modification of poly(carboxylic acid) derivatives or by pH-responsive amphiphiles. These liposomes delivered antigenic proteins into the cytosol of antigen presenting cells, which induced cross-presentation and antigen-specific cellular immunity. Adjuvant molecules or bioactive polysaccharide-based pH-responsive polymers improved their immunity-inducing effect further, leading to tumour regression in tumour-bearing mice. Precise design and control of the structures of stimulus-responsive materials and combination with functional materials are expected to create novel methodologies to control biological functions and to produce highly potent liposomal drugs that can achieve selective release of bioactive molecules.
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Affiliation(s)
- Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
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11
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Kim CG, Kye YC, Yun CH. The Role of Nanovaccine in Cross-Presentation of Antigen-Presenting Cells for the Activation of CD8 + T Cell Responses. Pharmaceutics 2019; 11:E612. [PMID: 31731667 PMCID: PMC6920862 DOI: 10.3390/pharmaceutics11110612] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 11/12/2019] [Accepted: 11/12/2019] [Indexed: 01/30/2023] Open
Abstract
Explosive growth in nanotechnology has merged with vaccine development in the battle against diseases caused by bacterial or viral infections and malignant tumors. Due to physicochemical characteristics including size, viscosity, density and electrostatic properties, nanomaterials have been applied to various vaccination strategies. Nanovaccines, as they are called, have been the subject of many studies, including review papers from a material science point of view, although a mode of action based on a biological and immunological understanding has yet to emerge. In this review, we discuss nanovaccines in terms of CD8+ T cell responses, which are essential for antiviral and anticancer therapies. We focus mainly on the role and mechanism, with particular attention to the functional aspects, of nanovaccines in inducing cross-presentation, an unconventional type of antigen-presentation that activates CD8+ T cells upon administration of exogenous antigens, in dendritic cells followed by activation of antigen-specific CD8+ T cell responses. Two major intracellular mechanisms that nanovaccines harness for cross-presentation are described; one is endosomal swelling and rupture, and the other is membrane fusion. Both processes eventually allow exogenous vaccine antigens to be exported from phagosomes to the cytosol followed by loading on major histocompatibility complex class I, triggering clonal expansion of CD8+ T cells. Advancement of nanotechnology with an enhanced understanding of how nanovaccines work will contribute to the design of more effective and safer nanovaccines.
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Affiliation(s)
- Cheol Gyun Kim
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (C.G.K.); (Y.-C.K.)
| | - Yoon-Chul Kye
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (C.G.K.); (Y.-C.K.)
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (C.G.K.); (Y.-C.K.)
- Center for Food and Bioconvergence, Seoul National University, Seoul 08826, Korea
- Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang, Gangwon-do 25354, Korea
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12
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Liu B, Zhang Q, Zhou F, Ren L, Zhao Y, Yuan X. Enhancing Membrane-Disruptive Activity via Hydrophobic Phenylalanine and Lysine Tethered to Poly(aspartic acid). ACS APPLIED MATERIALS & INTERFACES 2019; 11:14538-14547. [PMID: 30933470 DOI: 10.1021/acsami.8b22721] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Amphiphilic polymers with pH-responsive abilities have been widely used as carriers for intracellular delivery of bioactive substances, while their membrane-disruptive activity exerted on cells is a critical characteristic that determines delivery efficiency. Herein, we present a novel method to prepare amphiphilic and pH-responsive polymers by chemically tethering l-phenylalanine methyl ester and followed by Nε-carbobenzyloxy-l-lysine benzyl ester to the side carboxylic acid groups of poly(aspartic acid). The obtained phenylalanine- and lysine-grafted polymer (PAsp- g-Phe)- g-Lys demonstrated enhanced membrane-disruptive activity at pH 7.4 in comparison with that of PAsp- g-Phe. Moreover, the pH-responsive behavior of the grafted polymers caused by the significantly intensified hydrophobicity could be modulated by the tethered amount of hydrophobic amino acids with phenyl groups. The prepared amphiphilic (PAsp- g-Phe)- g-Lys could facilitate entry of calcein into NIH/3T3 and HeLa cells at physiological pH values, possibly due to local chemical destabilization of cell membranes by the interaction between the polymer and membrane bilayers. Therefore, we have provided a feasible approach to prepare pH-responsive polymers with enhanced membrane-disruptive activity, and the phenylalanine- and lysine-grafted polymers could be a potential candidate for intracellular delivery of bioactive molecules in biomedical applications.
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Affiliation(s)
- Bo Liu
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
| | - Qifa Zhang
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
| | - Fang Zhou
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
| | - Lixia Ren
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
| | - Yunhui Zhao
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
| | - Xiaoyan Yuan
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , China
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13
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Okubo M, Miyazaki M, Yuba E, Harada A. Chondroitin Sulfate-Based pH-Sensitive Polymer-Modified Liposomes for Intracellular Antigen Delivery and Induction of Cancer Immunity. Bioconjug Chem 2019; 30:1518-1529. [DOI: 10.1021/acs.bioconjchem.9b00221] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Minori Okubo
- Department of Applied Chemistry Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Maiko Miyazaki
- Department of Applied Chemistry Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Eiji Yuba
- Department of Applied Chemistry Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Atsushi Harada
- Department of Applied Chemistry Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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14
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Smith SA, Selby LI, Johnston APR, Such GK. The Endosomal Escape of Nanoparticles: Toward More Efficient Cellular Delivery. Bioconjug Chem 2018; 30:263-272. [PMID: 30452233 DOI: 10.1021/acs.bioconjchem.8b00732] [Citation(s) in RCA: 362] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Many emerging therapies rely on the delivery of biological cargo into the cytosol. Nanoparticle delivery systems hold great potential to deliver these therapeutics but are hindered by entrapment and subsequent degradation in acidic compartments of the endo/lysosomal pathway. Engineering polymeric delivery systems that are able to escape the endosome has significant potential to address this issue. However, the development of safe and effective delivery systems that can reliably deliver cargo to the cytosol is still a challenge. Greater understanding of the properties that govern endosomal escape and how it can be quantified is important for the development of more efficient nanoparticle delivery systems. This Topical Review highlights the current understanding of the mechanisms by which nanoparticles escape the endosome, and the emerging techniques to improve the quantification of endosomal escape.
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Affiliation(s)
- Samuel A Smith
- The School of Chemistry , The University of Melbourne , Parkville , Victoria , Australia , 3010
| | - Laura I Selby
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences , Monash University , Parkville , Victoria , Australia , 3052
| | - Angus P R Johnston
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences , Monash University , Parkville , Victoria , Australia , 3052
| | - Georgina K Such
- The School of Chemistry , The University of Melbourne , Parkville , Victoria , Australia , 3010
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15
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Li J, Qiu D, Liu Y, Xiong J, Wang Y, Yang X, Fu X, Zheng L, Luo G, Xing M, Wu Y. Cytomembrane Infused Polymer Accelerating Delivery of Myelin Antigen Peptide to Treat Experimental Autoimmune Encephalomyelitis. ACS NANO 2018; 12:11579-11590. [PMID: 30265798 DOI: 10.1021/acsnano.8b06575] [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: 06/08/2023]
Abstract
While there has been extensive development of soluble epitope-specific peptides to induce immune tolerance for the treatment of autoimmune diseases, the clinical efficacy of soluble-peptides-based immunotherapy was still uncertain. Recent strategies to develop antigen carriers coupled with peptides have shown promising results in preclinical animal models. Here we developed functional amphiphilic hyperbranched (HB) polymers with different grafting degrees of hydrophobic chains as antigen myelin antigen oligodendrocyte glycoprotein (MOG) peptide carriers and evaluated their ability to induce immune tolerance. We show that these polymers could efficiently deliver antigen peptide, and the uptake amount by bone marrow dendritic cells (BMDCs) was correlated with the hydrophobicity of polymers. We observe that these polymers have a higher ability to activate BMDCs and a higher efficacy to induce antigen-specific T cell apoptosis than soluble peptides, irrespective of hydrophobicity. We show that intravenous injection of polymer-conjugated MOG peptide, but not soluble peptide, markedly treats the clinical symptoms of experimental autoimmune encephalomyelitis in mice. Together, these results demonstrate the potential for using amphiphilic HB polymers as antigen carriers to deliver peptides for pathogenic autoreactive T cell deletion/tolerance strategies to treat autoimmune disorders.
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Affiliation(s)
- Jian Li
- Institute of Immunology, PLA , Third Military Medical University (Army Medical University) , Chongqing 400038 , China
| | - Ding Qiu
- Institute of Immunology, PLA , Third Military Medical University (Army Medical University) , Chongqing 400038 , China
| | - Yuqing Liu
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital , Third Military Medical University (Army Medical University) , Chongqing , 400038 , China
- Department of Mechanical Engineering , University of Manitoba , Winnipeg , MB R3T 2N2 , Canada
| | - Jian Xiong
- Institute of Immunology, PLA , Third Military Medical University (Army Medical University) , Chongqing 400038 , China
| | - Ying Wang
- Department of Mechanical Engineering , University of Manitoba , Winnipeg , MB R3T 2N2 , Canada
| | - Xia Yang
- Institute of Immunology, PLA , Third Military Medical University (Army Medical University) , Chongqing 400038 , China
| | - Xiaolan Fu
- Institute of Immunology, PLA , Third Military Medical University (Army Medical University) , Chongqing 400038 , China
| | - Lixin Zheng
- Molecular Development of the Immune System Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases , National Institutes of Health , Bethesda , Maryland 20892 , United States
| | - Gaoxing Luo
- Department of Mechanical Engineering , University of Manitoba , Winnipeg , MB R3T 2N2 , Canada
| | - Malcolm Xing
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital , Third Military Medical University (Army Medical University) , Chongqing , 400038 , China
- Department of Mechanical Engineering , University of Manitoba , Winnipeg , MB R3T 2N2 , Canada
| | - Yuzhang Wu
- Institute of Immunology, PLA , Third Military Medical University (Army Medical University) , Chongqing 400038 , China
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16
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YUBA E. Development of Immunity-Inducing Systems Using pH-Responsive Polysaccharides and Liposomes. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2018-0013] [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)
- Eiji YUBA
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
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17
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Lee JM, Park H, Oh KT, Lee ES. pH-Responsive hyaluronated liposomes for docetaxel delivery. Int J Pharm 2018; 547:377-384. [PMID: 29902507 DOI: 10.1016/j.ijpharm.2018.06.028] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/23/2018] [Accepted: 06/10/2018] [Indexed: 11/29/2022]
Abstract
In this study, we report pH-responsive liposomes consisting of hydrogenated soy phosphatidylcholine (HSPC) as a lipid, hyaluronic acid (HA) grafted with functional 3-diethylaminopropyl (DEAP) groups (hereafter denoted as HA-g-DEAP) as a pH-responsive polymer, and docetaxel (DTX) as an antitumor drug. DTX-loaded HSPC liposomes were prepared via a conventional liposome manufacturing procedure and then were decorated with HA-g-DEAP (HA-g-DEAP0.15, HA-g-DEAP0.25, and HA-g-DEAP0.40, according to the molar conjugate ratio of DEAP to HA) in an aqueous solution (pH 7.4), by sonication. The liposomes with HA-g-DEAP0.40 allowed the efficient release of the encapsulated DTX content when the pH of the solution decreased to 6.5 (i.e., endosomal pH), owing to the acidic pH-induced protonation of the DEAP anchored to the vesicular lipid bilayers. These hyaluronated liposomes were effective at entering the human colon carcinoma HCT-116 cells with a CD44 receptor overexpression. In an in vitro tumor cell cytotoxicity test, the DTX-loaded liposomes caused a significant increase in HCT-116 tumor cell death, revealing their pharmaceutical potential in tumor therapy.
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Affiliation(s)
- Jae Min Lee
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Hongsuk Park
- Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, Saint Louis, MO 63110, USA
| | - Kyung Taek Oh
- College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea.
| | - Eun Seong Lee
- Department of Biotechnology, The Catholic University of Korea, 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea.
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18
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Liposome-based immunity-inducing systems for cancer immunotherapy. Mol Immunol 2018; 98:8-12. [DOI: 10.1016/j.molimm.2017.11.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/21/2017] [Accepted: 11/03/2017] [Indexed: 12/13/2022]
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19
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Chiang YT, Lyu SY, Wen YH, Lo CL. Preparation and Characterization of Electrostatically Crosslinked Polymer⁻Liposomes in Anticancer Therapy. Int J Mol Sci 2018; 19:E1615. [PMID: 29848991 PMCID: PMC6032249 DOI: 10.3390/ijms19061615] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/27/2018] [Accepted: 05/28/2018] [Indexed: 11/23/2022] Open
Abstract
pH-sensitive polymer⁻liposomes can rapidly release their payloads. However, it is difficult to simultaneously achieve stability and pH-responsiveness in the polymer⁻liposomes. In this study, stable and pH-sensitive crosslinked polymer⁻liposomes were fabricated through electrostatic interactions. The pH-sensitive copolymer methoxy poly(ethylene glycol)-block-poly(methacrylic acid)-cholesterol (mPEG-b-P(MAAc)-chol) and crosslinking reagent poly(ethylene glycol) with end-capped with lysine (PEG-Lys2) were synthesized and characterized. At physiological conditions, the pH-sensitive copolymers were anionic and interacted electrostatically with the cationic crosslinker PEG-Lys2, forming the electrostatically-crosslinked polymer⁻liposomes and stabilizing the liposomal structure. At pH 5.0, the carboxylic groups in mPEG-b-P(MAAc)-chol were neutralized, and the liposomal structure was destroyed. The particle size of the crosslinked polymer⁻liposomes was approximately 140 nm and the polymer⁻liposomes were loaded with the anticancer drug doxorubicin. At pH 7.4, the crosslinked polymer⁻liposomes exhibited good stability with steady particle size and low drug leakage, even in the presence of fetal bovine serum. At pH 5.0, the architecture of the crosslinked polymer⁻liposomes was damaged following rapid drug release, as observed by using transmission electron microscopy and their apparent size variation. The crosslinked polymer⁻liposomes were pH-sensitive within the endosome and in the human breast cancer cells MDA-MB-231, as determined by using confocal laser scanning microscopy. The intracellular drug release profiles indicated cytotoxicity in cancer cells. These results indicated that the highly-stable and pH-sensitive electrostatically-crosslinked polymer⁻liposomes offered a potent drug-delivery system for use in anticancer therapies.
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Affiliation(s)
- Yi-Ting Chiang
- School of Pharmacy, China Medical University, Taichung City 402, Taiwan.
| | - Sih-Ying Lyu
- Department of Biomedical Engineering, National Yang Ming University, Taipei City 112, Taiwan.
| | - Yu-Han Wen
- Department of Biomedical Engineering, National Yang Ming University, Taipei City 112, Taiwan.
| | - Chun-Liang Lo
- Department of Biomedical Engineering, National Yang Ming University, Taipei City 112, Taiwan.
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20
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Ahmed S, Miyawaki O, Matsumura K. Enhanced Adsorption of a Protein-Nanocarrier Complex onto Cell Membranes through a High Freeze Concentration by a Polyampholyte Cryoprotectant. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:2352-2362. [PMID: 29361227 DOI: 10.1021/acs.langmuir.7b03622] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The transportation of biomolecules into cells is of great importance in tissue engineering and as stimulation for antitumor immune cells. Previous freezing strategies at ultracold temperatures (-80 °C) used for intracellular transportation exhibit certain limitations such as extended time requirements and harsh delivery system conditions. Thus, the need remains to develop simplified methods for safe nanomaterial delivery. Here, we demonstrated a unique strategy based on the ice-crystallization-induced freeze concentration for protein intracellular delivery in combination with a polyampholyte cryoprotectant. We found that upon sustained lowering of the temperature from -6 to -20 °C over a short duration, the adsorption of proteins onto the peripheral cell membrane was markedly increased through the facile ice-crystallization-induced freeze concentration. Furthermore, we proposed a freeze concentration factor (α) that depends on the freezing-point depression and is estimated from an analysis of the fraction of frozen water. Notably, the α values of the polyampholyte cryoprotectant were 8-fold higher than those of the currently used cryoprotectant dimethyl sulfoxide (DMSO) at particular temperatures of interest. Our results illustrate that the presence of a polyampholyte cryoprotectant significantly enhanced the adsorption of the protein/nanocarrier complex onto membranes compared to that obtained with DMSO because of the high freeze concentration. The present study demonstrated the direct relationship between freezing and the penetration of proteins across the periphery of the cell membrane by means of increased concentration during freezing. These results may be useful in providing a guideline for the intracellular delivery of biomacromolecules using ice-crystallization-induced continuous freezing combined with polyampholyte cryoprotectants.
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Affiliation(s)
- Sana Ahmed
- School of Materials Science, Japan Advanced Institute of Science and Technology , Nomi, Ishikawa 923-1292, Japan
| | - Osato Miyawaki
- Department of Food Science and Technology, Tokyo University of Marine Science and Technology , 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Kazuaki Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology , Nomi, Ishikawa 923-1292, Japan
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21
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Zamani P, Momtazi‐Borojeni AA, Nik ME, Oskuee RK, Sahebkar A. Nanoliposomes as the adjuvant delivery systems in cancer immunotherapy. J Cell Physiol 2018; 233:5189-5199. [DOI: 10.1002/jcp.26361] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Accepted: 11/29/2017] [Indexed: 01/14/2023]
Affiliation(s)
- Parvin Zamani
- BuAli Research InstituteStudent Research CommitteeDepartment of Medical BiotechnologyNanotechnology Research CenterSchool of MedicineMashhad University of Medical SciencesMashhadIran
| | - Amir Abbas Momtazi‐Borojeni
- BuAli Research InstituteStudent Research CommitteeDepartment of Medical BiotechnologyNanotechnology Research CenterSchool of MedicineMashhad University of Medical SciencesMashhadIran
| | - Maryam Ebrahimi Nik
- Student Research CommitteeFaculty of PharmacyDepartment of NanotechnologyMashhad University of Medical SciencesMashhadIran
| | - Reza Kazemi Oskuee
- Targeted Drug Delivery Research CenterMashhad University of Medical SciencesMashhadIran
| | - Amirhossein Sahebkar
- Biotechnology Research CenterPharmaceutical Technology InstituteMashhad University of Medical SciencesMashhadIran
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22
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Yuba E, Osaki T, Ono M, Park S, Harada A, Yamashita M, Azuma K, Tsuka T, Ito N, Imagawa T, Okamoto Y. Bleomycin-Loaded pH-Sensitive Polymer⁻Lipid-Incorporated Liposomes for Cancer Chemotherapy. Polymers (Basel) 2018; 10:polym10010074. [PMID: 30966109 PMCID: PMC6415073 DOI: 10.3390/polym10010074] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 01/11/2018] [Accepted: 01/13/2018] [Indexed: 12/20/2022] Open
Abstract
Cancer chemotherapeutic systems with high antitumor effects and less adverse effects are eagerly desired. Here, a pH-sensitive delivery system for bleomycin (BLM) was developed using egg yolk phosphatidylcholine liposomes modified with poly(ethylene glycol)-lipid (PEG-PE) for long circulation in the bloodstream and 2-carboxycyclohexane-1-carboxylated polyglycidol-having distearoyl phosphatidylethanolamine (CHexPG-PE) for pH sensitization. The PEG-PE/CHexPG-PE-introduced liposomes showed content release responding to pH decrease and were taken up by tumor cells at a rate 2.5 times higher than that of liposomes without CHexPG-PE. BLM-loaded PEG-PE/CHexPG-PE-introduced liposomes exhibited comparable cytotoxicity with that of the free drug. Intravenous administration of these liposomes suppressed tumor growth more effectively in tumor-bearing mice than did the free drug and liposomes without CHexPG-PE. However, at a high dosage of BLM, these liposomes showed severe toxicity to the spleen, liver, and lungs, indicating the trapping of liposomes by mononuclear phagocyte systems, probably because of recognition of the carboxylates on the liposomes. An increase in PEG molecular weight on the liposome surface significantly decreased toxicity to the liver and spleen, although toxicity to the lungs remained. Further improvements such as the optimization of PEG density and lipid composition and the introduction of targeting ligands to the liposomes are required to increase therapeutic effects and to reduce adverse effects.
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Affiliation(s)
- Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Tomohiro Osaki
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Misato Ono
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Shinjae Park
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Masamichi Yamashita
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Kazuo Azuma
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Takeshi Tsuka
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Norihiko Ito
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Tomohiro Imagawa
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
| | - Yoshiharu Okamoto
- Joint Department of Veterinary Clinical Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan.
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23
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Miyazaki M, Yuba E, Hayashi H, Harada A, Kono K. Hyaluronic Acid-Based pH-Sensitive Polymer-Modified Liposomes for Cell-Specific Intracellular Drug Delivery Systems. Bioconjug Chem 2017; 29:44-55. [PMID: 29183110 DOI: 10.1021/acs.bioconjchem.7b00551] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
For the enhancement of therapeutic effects and reduction of side effects derived from anticancer drugs in cancer chemotherapy, it is imperative to develop drug delivery systems with cancer-specificity and controlled release function inside cancer cells. pH-sensitive liposomes are useful as an intracellular drug delivery system because of their abilities to transfer their contents into the cell interior through fusion or destabilization of endosome, which has weakly acidic environment. We earlier reported liposomes modified with various types of pH-sensitive polymers based on synthetic polymers and biopolymers as vehicles for intracellular drug delivery systems. In this study, hyaluronic acid (HA)-based pH-sensitive polymers were designed as multifunctional polymers having not only pH-sensitivity but also targeting properties to cells expressing CD44, which is known as a cancer cell surface marker. Carboxyl group-introduced HA derivatives of two types, MGlu-HA and CHex-HA, which have a more hydrophobic side chain structure than that of MGlu-HA, were synthesized by reaction with various dicarboxylic anhydrides. These polymer-modified liposomes were stable at neutral pH, but showed content release under weakly acidic conditions. CHex-HA-modified liposomes delivered their contents into CD44-expressing cells more efficiently than HA-modified or MGlu-HA-modified liposomes or unmodified liposomes, whereas the same liposomes were taken up only slightly by cells expressing CD44 proteins less. Competition assay using free HA or other polymers revealed that HA derivative-modified liposomes might be recognized by CD44. Therefore, HA-derivative-modified liposomes are useful as cell-specific intracellular drug delivery systems.
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Affiliation(s)
- Maiko Miyazaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Hiroshi Hayashi
- Science Lin Co., Ltd. , 1-1-35 Nishiawaji, Higashiyodogawa-Ku, Osaka, Osaka 533-0031, Japan
| | - Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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24
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Yuba E, Sakaguchi N, Kanda Y, Miyazaki M, Koiwai K. pH-Responsive Micelle-Based Cytoplasmic Delivery System for Induction of Cellular Immunity. Vaccines (Basel) 2017; 5:vaccines5040041. [PMID: 29113042 PMCID: PMC5748608 DOI: 10.3390/vaccines5040041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 10/31/2017] [Accepted: 11/03/2017] [Indexed: 12/13/2022] Open
Abstract
(1) Background: Cytoplasmic delivery of antigens is crucial for the induction of cellular immunity, which is an important immune response for the treatment of cancer and infectious diseases. To date, fusogenic protein-incorporated liposomes and pH-responsive polymer-modified liposomes have been used to achieve cytoplasmic delivery of antigen via membrane rupture or fusion with endosomes. However, a more versatile cytoplasmic delivery system is desired for practical use. For this study, we developed pH-responsive micelles composed of dilauroyl phosphatidylcholine (DLPC) and deoxycholic acid and investigated their cytoplasmic delivery performance and immunity-inducing capability. (2) Methods: Interaction of micelles with fluorescence dye-loaded liposomes, intracellular distribution of micelles, and antigenic proteins were observed. Finally, antigen-specific cellular immune response was evaluated in vivo using ELIspot assay. (3) Results: Micelles induced leakage of contents from liposomes via lipid mixing at low pH. Micelles were taken up by dendritic cells mainly via macropinocytosis and delivered ovalbumin (OVA) into the cytosol. After intradermal injection of micelles and OVA, OVA-specific cellular immunity was induced in the spleen. (4) Conclusions: pH-responsive micelles composed of DLPC and deoxycholic acid are promising as enhancers of cytosol delivery of antigens and the induction capability of cellular immunity for the treatment of cancer immunotherapy and infectious diseases.
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Affiliation(s)
- Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
| | | | - Yuhei Kanda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
| | - Maiko Miyazaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 5998531, Japan.
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25
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Yamazaki N, Yamakawa S, Sugimoto T, Yoshizaki Y, Teranishi R, Hayashi T, Kotaka A, Shinde C, Kumei T, Sumida Y, Shimizu T, Ohashi Y, Yuba E, Harada A, Kono K. Carboxylated phytosterol derivative-introduced liposomes for skin environment-responsive transdermal drug delivery system. J Liposome Res 2017; 28:275-284. [DOI: 10.1080/08982104.2017.1369995] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Naoko Yamazaki
- Research Institute, Fancl Corporation, Yokohama, Kanagawa, Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Satoshi Yamakawa
- Cosmetic Ingredients Laboratory, Nippon Fine Chemical Corporation, Takasago, Hyogo, Japan
| | - Takumi Sugimoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Yuta Yoshizaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Ryoma Teranishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Takaaki Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Aki Kotaka
- Research Institute, Fancl Corporation, Yokohama, Kanagawa, Japan
| | - Chiharu Shinde
- Research Institute, Fancl Corporation, Yokohama, Kanagawa, Japan
| | - Takayuki Kumei
- Research Institute, Fancl Corporation, Yokohama, Kanagawa, Japan
| | - Yasushi Sumida
- Research Institute, Fancl Corporation, Yokohama, Kanagawa, Japan
| | - Toru Shimizu
- Cosmetic Ingredients Laboratory, Nippon Fine Chemical Corporation, Takasago, Hyogo, Japan
| | - Yukihiro Ohashi
- Cosmetic Ingredients Laboratory, Nippon Fine Chemical Corporation, Takasago, Hyogo, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
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26
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Development of pH-sensitive Dextran Derivatives with Strong Adjuvant Function and Their Application to Antigen Delivery. MEMBRANES 2017; 7:membranes7030041. [PMID: 28777336 PMCID: PMC5618126 DOI: 10.3390/membranes7030041] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 07/28/2017] [Accepted: 08/01/2017] [Indexed: 12/18/2022]
Abstract
To achieve efficient cancer immunotherapy, the induction of cytotoxic T lymphocyte-based cellular immunity is necessary. In order to induce cellular immunity, antigen carriers that can deliver antigen into cytosol of antigen presenting cells and can activate these cells are required. We previously developed 3-methyl glutarylated dextran (MGlu-Dex) for cytoplasmic delivery of antigen via membrane disruption ability at weakly acidic pH in endosome/lysosomes. MGlu-Dex-modified liposomes delivered model antigens into cytosol of dendritic cells and induced antigen-specific cellular immunity. However, their antitumor effects were not enough to complete the regression of the tumor. In this study, antigen delivery performance of dextran derivatives was improved by the introduction of more hydrophobic spacer groups next to carboxyl groups. 2-Carboxycyclohexane-1-carboxylated dextran (CHex-Dex) was newly synthesized as pH-responsive dextran derivative. CHex-Dex formed stronger hydrophobic domains at extremely weak acidic pH and destabilized lipid membrane more efficiently than MGlu-Dex. CHex-Dex-modified liposomes were taken up by dendritic cells 10 times higher than MGlu-Dex-modified liposomes and delivered model antigen into cytosol. Furthermore, CHex-Dex achieved 600 times higher IL-12 production from dendritic cells than MGlu-Dex. Therefore, CHex-Dex is promising as multifunctional polysaccharide having both cytoplasmic antigen delivery function and strong activation property of dendritic cells for induction of cellular immunity.
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27
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Harada A, Teranishi R, Yuba E, Kono K. Effect of the side chain spacer structure on the pH-responsive properties of polycarboxylates. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:1025-1035. [DOI: 10.1080/09205063.2017.1324551] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Ryoma Teranishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Osaka, Japan
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Preparation of dual-stimuli-responsive liposomes using methacrylate-based copolymers with pH and temperature sensitivities for precisely controlled release. Colloids Surf B Biointerfaces 2017; 155:449-458. [PMID: 28463812 DOI: 10.1016/j.colsurfb.2017.04.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 04/12/2017] [Accepted: 04/19/2017] [Indexed: 12/26/2022]
Abstract
Dual-signal-sensitive copolymers were synthesized by copolymerization of methoxy diethylene glycol methacrylate, methacrylic acid, and lauroxy tetraethylene glycol methacrylate, which respectively provide temperature sensitivity, pH sensitivity, and anchoring to liposome surfaces. These novel copolymers, with water solubility that differs depending on temperature and pH, are soluble in water under neutral pH and low-temperature conditions, but they become water-insoluble and form aggregates under acidic pH and high-temperature conditions. Liposomes modified with these copolymers exhibited enhanced content release at weakly acidic pH with increasing temperature, although no temperature-dependent content release was observed in neutral conditions. Interaction between the copolymers and the lipid monolayer at the air-water interface revealed that the copolymer chains penetrate more deeply into the monolayer with increasing temperature at acidic pH than at neutral pH, where the penetration of copolymer chains was moderate and temperature-independent at neutral pH. Interaction of the copolymer-modified liposomes with HeLa cells demonstrated that the copolymer-modified liposomes were adsorbed quickly and efficiently onto the cell surface and that they were internalized more gradually than the unmodified liposomes through endocytosis. Furthermore, the copolymer-modified liposomes enhanced the content release in endosomes with increasing temperature, but no such temperature-dependent enhancement of content release was observed for unmodified liposomes.
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29
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A two-component micelle with emergent pH responsiveness by mixing dilauroyl phosphocholine and deoxycholic acid and its delivery of proteins into the cytosol. Colloids Surf B Biointerfaces 2017; 154:246-252. [PMID: 28347946 DOI: 10.1016/j.colsurfb.2017.03.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 03/03/2017] [Accepted: 03/04/2017] [Indexed: 01/11/2023]
Abstract
Providing appropriate pH responsiveness for drug delivery nanoparticles is one of the major issues in developing a new generation of delivery systems. This paper reports that, when phosphocholine and a bile acid were mixed, the resultant two-component micelle gained pH responsiveness, while the individual components did not show any such responsiveness. The pH responsiveness was shown to be determined by the chemical structure, especially the positions and chirality of the OH groups, of the bile acid, and the sensitivity was determined by the alkyl chain length of the phosphocholine. The best combination for evading endocytosis was dilauroyl phosphocholine (DLPC) and deoxycholic acid (DA). Small-angle X-ray scattering revealed that the pH responsiveness was related to the change of surface hydrophobicity, namely, decreasing pH led to protonation of the carboxylic acid, resulting in aggregation of the preceding micelles. We assume that particles that become hydrophobic in this way can start interacting with the endocytotic bilayer, which eventually leads to rupture of the endocytotic vesicle. This mechanism is well supported by the finding that fluorescein-conjugated ovalbumin proteins were transported into the cytosol when they were co-administered with DLPC/DA.
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30
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Yuba E, Yamaguchi A, Yoshizaki Y, Harada A, Kono K. Bioactive polysaccharide-based pH-sensitive polymers for cytoplasmic delivery of antigen and activation of antigen-specific immunity. Biomaterials 2017; 120:32-45. [DOI: 10.1016/j.biomaterials.2016.12.021] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 12/03/2016] [Accepted: 12/16/2016] [Indexed: 11/17/2022]
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31
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Yamazaki N, Sugimoto T, Fukushima M, Teranishi R, Kotaka A, Shinde C, Kumei T, Sumida Y, Munekata Y, Maruyama KI, Yuba E, Harada A, Kono K. Dual-stimuli responsive liposomes using pH- and temperature-sensitive polymers for controlled transdermal delivery. Polym Chem 2017. [DOI: 10.1039/c6py01754a] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The use of skin environment-sensitive liposomes for transdermal penetration is beneficial for improving cosmetic efficacy.
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32
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Ahmed S, Fujita S, Matsumura K. Enhanced protein internalization and efficient endosomal escape using polyampholyte-modified liposomes and freeze concentration. NANOSCALE 2016; 8:15888-15901. [PMID: 27439774 DOI: 10.1039/c6nr03940e] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we show a new strategy for efficient freeze concentration-mediated cytoplasmic delivery of proteins, obtained via the endosomal escape property of polyampholyte-modified liposomes. The freeze concentration method successfully induces the efficient internalization of proteins simply by freezing cells with protein and nanocarrier complexes. However, the mechanism of protein internalization remains unclear. Here, we designed a novel protein delivery carrier by modifying liposomes through incorporating hydrophobic polyampholytes therein. These complexes were characterized for particle size, encapsulation efficiency, and cytotoxicity. Flow cytometry and microscopic analysis showed that the adsorption and internalization of protein-loaded polyampholyte-modified liposomes after freezing were enhanced compared with that observed in unfrozen complexes. Inhibition studies demonstrated that the internalization mechanism differs between unmodified and polyampholyte-modified liposomes. Furthermore, polyampholyte-modified liposomes exhibited high efficacy in facilitating endosomal escape to enhance protein delivery to the cytoplasm with low toxicity. These results strongly suggest that the freeze concentration-based strategy could be widely utilised for efficient cargo delivery into the cytoplasm in vitro not only in cancer treatment but also for gene therapy as well.
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Affiliation(s)
- Sana Ahmed
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
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33
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Design of pH-sensitive polymer-modified liposomes for antigen delivery and their application in cancer immunotherapy. Polym J 2016. [DOI: 10.1038/pj.2016.31] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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34
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Mechanisms and biomaterials in pH-responsive tumour targeted drug delivery: A review. Biomaterials 2016; 85:152-67. [PMID: 26871891 DOI: 10.1016/j.biomaterials.2016.01.061] [Citation(s) in RCA: 619] [Impact Index Per Article: 77.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 01/25/2016] [Accepted: 01/27/2016] [Indexed: 12/12/2022]
Abstract
As the mainstay in the treatment of various cancers, chemotherapy plays a vital role, but still faces many challenges, such as poor tumour selectivity and multidrug resistance (MDR). Targeted drug delivery using nanotechnology has provided a new strategy for addressing the limitations of the conventional chemotherapy. In the last decade, the volume of research published in this area has increased tremendously, especially with functional nano drug delivery systems (nanocarriers). Coupling a specific stimuli-triggered drug release mechanism with these delivery systems is one of the most prevalent approaches for improving therapeutic outcomes. Among the various stimuli, pH triggered delivery is regarded as the most general strategy, targeting the acidic extracellular microenvironment and intracellular organelles of solid tumours. In this review, we discuss recent advances in the development of pH-sensitive nanocarriers for tumour-targeted drug delivery. The review focuses on the chemical design of pH-sensitive biomaterials, which are used to fabricate nanocarriers for extracellular and/or intracellular tumour site-specific drug release. The pH-responsive biomaterials bring forth conformational changes in these nanocarriers through various mechanisms such as protonation, charge reversal or cleavage of a chemical bond, facilitating tumour specific cell uptake or drug release. A greater understanding of these mechanisms will help to design more efficient drug delivery systems to address the challenges encountered in conventional chemotherapy.
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35
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Lu J, Yoshimura K, Goto K, Lee C, Hamura K, Kwon O, Tamanoi F. Nanoformulation of Geranylgeranyltransferase-I Inhibitors for Cancer Therapy: Liposomal Encapsulation and pH-Dependent Delivery to Cancer Cells. PLoS One 2015; 10:e0137595. [PMID: 26352258 PMCID: PMC4564137 DOI: 10.1371/journal.pone.0137595] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 08/18/2015] [Indexed: 12/17/2022] Open
Abstract
Small molecule inhibitors against protein geranylgeranyltransferase-I such as P61A6 have been shown to inhibit proliferation of a variety of human cancer cells and exhibit antitumor activity in mouse models. Development of these inhibitors could be dramatically accelerated by conferring tumor targeting and controlled release capability. As a first step towards this goal, we have encapsulated P61A6 into a new type of liposomes that open and release cargos only under low pH condition. These low pH-release type liposomes were prepared by adjusting the ratio of two types of phospholipid derivatives. Loading of geranylgeranyltransferase-I inhibitor (GGTI) generated liposomes with average diameter of 50–100 nm. GGTI release in solution was sharply dependent on pH values, only showing release at pH lower than 6. Release of cargos in a pH-dependent manner inside the cell was demonstrated by the use of a proton pump inhibitor Bafilomycin A1 that Increased lysosomal pH and inhibited the release of a dye carried in the pH-liposome. Delivery of GGTI to human pancreatic cancer cells was demonstrated by the inhibition of protein geranylgeranylation inside the cell and this effect was blocked by Bafilomycin A1. In addition, GGTI delivered by pH-liposomes induced proliferation inhibition, G1 cell cycle arrest that is associated with the expression of cell cycle regulator p21CIP1/WAF1. Proliferation inhibition was also observed with various lung cancer cell lines. Availability of nanoformulated GGTI opens up the possibility to combine with other types of inhibitors. To demonstrate this point, we combined the liposomal-GGTI with farnesyltransferase inhibitor (FTI) to inhibit K-Ras signaling in pancreatic cancer cells. Our results show that the activated K-Ras signaling in these cells can be effectively inhibited and that synergistic effect of the two drugs is observed. Our results suggest a new direction in the use of GGTI for cancer therapy.
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Affiliation(s)
- Jie Lu
- Dept. of Microbiology, Immunology and Molecular Genetics, Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90095, United States of America
| | - Kohei Yoshimura
- DDS Research Laboratory, NOF CORPORATION, Kawasaki, Kanagawa 210–0865, Japan
| | - Koichi Goto
- Division of Applied Life Science, Graduate School of Engineering, Sojo University, Kumamoto, Japan
| | - Craig Lee
- Dept. of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA 90095, United States of America
| | - Ken Hamura
- DDS Research Laboratory, NOF CORPORATION, Kawasaki, Kanagawa 210–0865, Japan
| | - Ohyun Kwon
- Dept. of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA 90095, United States of America
| | - Fuyuhiko Tamanoi
- Dept. of Microbiology, Immunology and Molecular Genetics, Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90095, United States of America
- * E-mail:
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36
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Yuba E, Kanda Y, Yoshizaki Y, Teranishi R, Harada A, Sugiura K, Izawa T, Yamate J, Sakaguchi N, Koiwai K, Kono K. pH-sensitive polymer-liposome-based antigen delivery systems potentiated with interferon-γ gene lipoplex for efficient cancer immunotherapy. Biomaterials 2015. [PMID: 26222284 DOI: 10.1016/j.biomaterials.2015.07.031] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Potentiation of pH-sensitive liposome-based antigen carriers with IFN-γ gene lipoplexes was attempted to achieve efficient induction of tumor-specific immunity. 3-Methylglutarylated poly(glycidol) (MGluPG)-modified liposomes and cationic liposomes were used, respectively, for the delivery of antigenic protein ovalbumin (OVA) and IFN-γ-encoding plasmid DNA (pDNA). The MGluPG-modified liposomes and the cationic liposome-pDNA complexes (lipoplexes) formed hybrid complexes via electrostatic interactions after their mixing in aqueous solutions. The hybrid complexes co-delivered OVA and IFN-γ-encoding pDNA into DC2.4 cells, a murine dendritic cell line, as was the case of MGluPG-modified liposomes for OVA or the lipoplexes for pDNA. Both the lipoplexes and the hybrid complexes transfected DC2.4 cells and induced IFN-γ protein production, but transfection activities of the hybrid complexes were lower than those of the parent lipoplexes. Subcutaneous administration of hybrid complexes to mice bearing E.G7-OVA tumor reduced tumor volumes, which might result from the induction of OVA-specific cytotoxic T lymphocytes (CTLs). However, the hybrid complex-induced antitumor effect was the same level of the MGluPG-modified liposome-mediated antitumor immunity. In contrast, an extremely strong antitumor immune response was derived when these liposomes and lipoplexes without complexation were injected subcutaneously at the same site of tumor-bearing mice. Immunohistochemical analysis of tumor sections revealed that immunization through the liposome-lipoplex combination promoted the infiltration of CTLs to tumors at an early stage of treatment compared with liposomes, resulting in strong therapeutic effects.
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Affiliation(s)
- Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yuhei Kanda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yuta Yoshizaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ryoma Teranishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kikuya Sugiura
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-oraikita, Izumisano, Osaka 598-8531, Japan
| | - Takeshi Izawa
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-oraikita, Izumisano, Osaka 598-8531, Japan
| | - Jyoji Yamate
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku-oraikita, Izumisano, Osaka 598-8531, Japan
| | - Naoki Sakaguchi
- Terumo Corp., Ltd., Ashigarakami-gun, Kanagawa 259-0151, Japan
| | - Kazunori Koiwai
- Terumo Corp., Ltd., Ashigarakami-gun, Kanagawa 259-0151, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
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37
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Doura T, Yamada M, Teranishi R, Yamamoto Y, Sugimoto T, Yuba E, Harada A, Kono K. PAMAM Dendron Lipid Assemblies That Undergo Structural Transition in Response to Weakly Acidic pH and Their Cytoplasmic Delivery Capability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5105-5114. [PMID: 25897891 DOI: 10.1021/acs.langmuir.5b00183] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Dendron lipids designed to consist of amine-terminated polyamidoamine G1 dendron and two octadecyl chains were used for the preparation of pH-responsive molecular assemblies having phase structures that are changed through their dynamic molecular shape. The dendron lipid contains two primary amines and two tertiary amines in the dendron moiety, changing its charged state in the pH region between pH 10 and pH 4. The assemblies were shown to take a vesicle structure at neutral and alkaline pHs, but their structure changed to a micelle-like structure below pH 6.4. Because this pH region corresponds to one in which tertiary amines of the dendron lipid became protonated, protonation of tertiary amines in addition to primary amines in the dendron moiety might affect its dynamic molecular shape, resulting in a sharp pH response of the assemblies. The assemblies tended to form aggregates when taking on a vesicle form with a gel phase, but incorporation of a poly(ethylene glycol)-lipid provided dendron lipid vesicles with both sharp pH response and high colloidal stability. The poly(ethylene glycol)-incorporated dendron lipid vesicles tightly retained ovalbumin molecules in their internal aqueous space but released them almost completely at pH 6.0. In addition, the vesicles were shown to achieve efficient ovalbumin delivery into cytosol of DC2.4 cells (mouse dendritic cell line) after internalization through endocytosis.
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Affiliation(s)
- Tomohiro Doura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Megumi Yamada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ryoma Teranishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yuhei Yamamoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Takumi Sugimoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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38
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Yoshizaki Y, Yuba E, Sakaguchi N, Koiwai K, Harada A, Kono K. Potentiation of pH-sensitive polymer-modified liposomes with cationic lipid inclusion as antigen delivery carriers for cancer immunotherapy. Biomaterials 2014; 35:8186-96. [DOI: 10.1016/j.biomaterials.2014.05.077] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 05/26/2014] [Indexed: 01/10/2023]
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39
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Ahmed S, Hayashi F, Nagashima T, Matsumura K. Protein cytoplasmic delivery using polyampholyte nanoparticles and freeze concentration. Biomaterials 2014; 35:6508-18. [DOI: 10.1016/j.biomaterials.2014.04.030] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 04/10/2014] [Indexed: 12/18/2022]
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40
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Chiang YT, Lo CL. pH-Responsive polymer-liposomes for intracellular drug delivery and tumor extracellular matrix switched-on targeted cancer therapy. Biomaterials 2014; 35:5414-5424. [DOI: 10.1016/j.biomaterials.2014.03.046] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 03/18/2014] [Indexed: 10/25/2022]
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41
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Yuba E, Tajima N, Yoshizaki Y, Harada A, Hayashi H, Kono K. Dextran derivative-based pH-sensitive liposomes for cancer immunotherapy. Biomaterials 2014; 35:3091-101. [DOI: 10.1016/j.biomaterials.2013.12.024] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 12/13/2013] [Indexed: 12/31/2022]
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42
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Paliwal SR, Paliwal R, Vyas SP. A review of mechanistic insight and application of pH-sensitive liposomes in drug delivery. Drug Deliv 2014; 22:231-42. [PMID: 24524308 DOI: 10.3109/10717544.2014.882469] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The pH-sensitive liposomes have been extensively used as an alternative to conventional liposomes in effective intracellular delivery of therapeutics/antigen/DNA/diagnostics to various compartments of the target cell. Such liposomes are destabilized under acidic conditions of the endocytotic pathway as they usually contain pH-sensitive lipid components. Therefore, the encapsulated content is delivered into the intracellular bio-environment through destabilization or its fusion with the endosomal membrane. The therapeutic efficacy of pH-sensitive liposomes enables them as biomaterial with commercial utility especially in cancer treatment. In addition, targeting ligands including antibodies can be anchored on the surface of pH-sensitive liposomes to target specific cell surface receptors/antigen present on tumor cells. These vesicles have also been widely explored for antigen delivery and serve as immunological adjuvant to enhance the immune response to antigens. The present review deals with recent research updates on application of pH-sensitive liposomes in chemotherapy/diagnostics/antigen/gene delivery etc.
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Affiliation(s)
- Shivani Rai Paliwal
- Department of Pharmaceutics, SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya Bilaspur , Chhattisgarh , India
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43
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Chen J, Xia J, Tian H, Tang Z, He C, Chen X. Thermo-/pH-dual responsive properties of hyperbranched polyethylenimine grafted by phenylalanine. Arch Pharm Res 2013; 37:142-8. [PMID: 24263409 PMCID: PMC3889500 DOI: 10.1007/s12272-013-0288-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/31/2013] [Indexed: 11/24/2022]
Abstract
Novel thermo- and pH-dual responsive amphiphilic copolymers were synthesized based on hyperbranched polyethylenimine (PEI) by grafting l-phenylalanine. The phenylalanine-modified PEI exhibited lower cytotoxicity than commercial PEI. These copolymers showed the phenomena of phase transitions in response to pH and temperature. The dilute copolymer solution at lower pH displayed the higher LCST. Furthermore, LCST increased with the increasing of phenylalanine grafting density. LCST of these copolymers were tunable from 7.2 to 59.6 °C by the degree of amidation and pH of solution. DLS and TEM experiments certified that the copolymer chains aggregated to form small size particles as increasing the temperature above LCST. For these reasons, the obtained smart copolymers were considered to be potential gene/drug carriers in biomedical field.
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Affiliation(s)
- Jie Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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44
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Shinke Y, Kanazawa A, Kanaoka S, Aoshima S. Precise synthesis of pH-responsive copolymers with naphthoic acid side groups via living cationic polymerization. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26954] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yu Shinke
- Department of Macromolecular Science; Graduate School of Science, Osaka University; Toyonaka, Osaka 560-0043 Japan
| | - Arihiro Kanazawa
- Department of Macromolecular Science; Graduate School of Science, Osaka University; Toyonaka, Osaka 560-0043 Japan
| | - Shokyoku Kanaoka
- Department of Macromolecular Science; Graduate School of Science, Osaka University; Toyonaka, Osaka 560-0043 Japan
| | - Sadahito Aoshima
- Department of Macromolecular Science; Graduate School of Science, Osaka University; Toyonaka, Osaka 560-0043 Japan
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45
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Watarai S, Iwase T, Tajima T, Yuba E, Kono K, Sekiya Y. Application of pH-sensitive fusogenic polymer-modified liposomes for development of mucosal vaccines. Vet Immunol Immunopathol 2013; 158:62-72. [PMID: 23790647 DOI: 10.1016/j.vetimm.2013.05.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 05/03/2013] [Accepted: 05/06/2013] [Indexed: 11/27/2022]
Abstract
To evaluate the usefulness of pH-sensitive fusogenic polymer (succinylated poly(glycidol) (SucPG) and 3-methylglutarylated poly(glycidol) (MGluPG))-modified liposomes as mucosal vaccine in the induction of a protective immune responses was evaluated. Mice were nasally immunized with OVA-containing SucPG-modified liposomes. After immunization, significant Ag-specific Abs were detected in the serum and intestine. When sera were analyzed for isotype distribution, antigen-specific IgG1 Ab responses were noted in mice immunized with OVA-containing polymer-unmodified liposomes, whereas immunization with OVA-containing SucPG-modified liposomes resulted in the induction of OVA-specific IgG1, IgG2a and IgG3 Ab responses. In spleen lymphocytes from mice immunized with OVA-containing SucPG-modified liposomes, both IFN-γ and IL-4 mRNA were detected. The same result was obtained also in the mouse immunized with OVA-containing MGluPG-modified liposomes. Furthermore, we examined the induction of immune responses in chickens following intraocular immunization with Salmonella Enteritidis Ag-containing MGluPG-modified liposomes, and the protective effect against the challenge with S. Enteritidis. Immunization with S. Enteritidis Ag-containing MGluPG-modified liposomes induced significant Ab responses against S. Enteritidis in the serum and intestine. Less fecal excretion of bacteria was observed in chickens immunized with S. Enteritidis Ag-containing MGluPG-modified liposomes after challenge. The numbers of bacteria in the caecum were also lower in immunized chickens than in unimmunized controls.
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Affiliation(s)
- Shinobu Watarai
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan.
| | - Tana Iwase
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Tomoko Tajima
- Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598-8531, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Yukio Sekiya
- Research Institute, Nippon Biologicals, Inc., Koriyama, Fukushima 963-0196, Japan
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46
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Yuba E, Kono Y, Harada A, Yokoyama S, Arai M, Kubo K, Kono K. The application of pH-sensitive polymer-lipids to antigen delivery for cancer immunotherapy. Biomaterials 2013; 34:5711-21. [PMID: 23639528 DOI: 10.1016/j.biomaterials.2013.04.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 04/03/2013] [Indexed: 12/14/2022]
Abstract
For production of pH-sensitive liposomes, we developed pH-sensitive polymer-lipids that consists of pH-sensitive fusogenic polymer moieties such as 3-methyl glutarylated poly(glycidol) and 2-carboxycyclohexane-1-carboxylated poly(glycidol), connected to a phosphatidylethanolamine head group. Incorporation of these pH-sensitive polymer-lipids into egg yolk phosphatidylcholine liposomes produced highly pH-sensitive liposomes that were stable at neutral pH but which destabilized markedly in response to very small pH change in weakly acidic pH region. These liposomes delivered their contents (pyranine) into cytosol of dendritic cell-derived DC2.4 cells. When these polymer-lipid-incorporated liposomes loaded with antigenic protein ovalbumin (OVA) were administered subcutaneously to mice, the antigen-specific cellular immunity was induced efficiently in the mice. Furthermore, immunization of mice with these OVA-loaded pH-sensitive polymer-lipid-incorporated liposomes induced strong OVA-specific immunity, which achieved complete rejection of OVA-expressing E.G7-OVA cells and marked regression of E.G7-OVA tumors.
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Affiliation(s)
- Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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Rai Paliwal S, Paliwal R, Vyas SP. pH-sensitive Liposomes in Drug Delivery. SMART MATERIALS FOR DRUG DELIVERY 2013. [DOI: 10.1039/9781849736800-00080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The pH-sensitive liposomes have been extensively studied in recent years as an advantageous alternative to conventional liposomes in effective targeting and accumulation of anticancer drugs in tumors. pH-sensitive liposomes usually contain phosphatidylethanolamine and stabilizing amphiphiles and can destabilize under acidic conditions of the endocytotic pathway. The drug loaded is thought to be delivered into the cytoplasm, probably through destabilization of or fusion with the endosome membrane. This fusogenic property makes the pH-sensitive liposomes more efficient in delivering anticancer drugs than conventional liposomes. The intra-cellular release of drug/gene/diagnostic agents can be achieved without altering their therapeutic efficacy by means of the endosomal escape phenomenon. Cell surface targeting ligands, including antibodies, can be appended on the surface of pH-sensitive liposomes to target specific receptors on tumor cells. This chapter provides an introduction to pH-sensitive liposomes and examples of their therapeutic interest as smart drug-delivery systems.
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Affiliation(s)
- Shivani Rai Paliwal
- Drug Delivery Research Laboratory Department of Pharmaceutical Sciences, Dr H. S. Gour Vishwavidyalaya (A Central University), Sagar M.P. India, 470003
- Department of Pharmaceutics SLT Institute of Pharmaceutical Sciences, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, C.G. India, 495009
| | - Rishi Paliwal
- Drug Delivery Research Laboratory Department of Pharmaceutical Sciences, Dr H. S. Gour Vishwavidyalaya (A Central University), Sagar M.P. India, 470003
| | - Suresh P Vyas
- Drug Delivery Research Laboratory Department of Pharmaceutical Sciences, Dr H. S. Gour Vishwavidyalaya (A Central University), Sagar M.P. India, 470003
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A liposome-based antigen delivery system using pH-sensitive fusogenic polymers for cancer immunotherapy. Biomaterials 2013; 34:3042-52. [DOI: 10.1016/j.biomaterials.2012.12.031] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 12/22/2012] [Indexed: 02/07/2023]
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Efficiency of pH-sensitive fusogenic polymer-modified liposomes as a vaccine carrier. ScientificWorldJournal 2013; 2013:903234. [PMID: 23431260 PMCID: PMC3575622 DOI: 10.1155/2013/903234] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 12/30/2012] [Indexed: 12/13/2022] Open
Abstract
The usefulness of pH-sensitive fusogenic polymer-(succinylated poly(glycidol)-(SucPG-) modified liposomes as a vaccine carrier in the induction of immune responses was evaluated. Mice were intraperitoneally immunized with ovalbumin- (OVA-) containing SucPG-modified liposomes. After immunization, significant OVA-specific antibodies were detected in the serum. When sera were analyzed for isotype distribution, OVA-specific IgG1 antibody responses were noted in mice immunized with OVA-containing polymer-unmodified liposomes, whereas immunization with OVA-containing SucPG-modified liposomes resulted in the induction of OVA-specific IgG1, IgG2a, and IgG3 Ab responses. In spleen lymphocytes from mice immunized with OVA-containing SucPG-modified liposomes, both IFN-γ-(Th1-type-) and IL-4-(Th2 type-) specific mRNA were detected. Moreover, substantial production of IFN-γ and IL-4 was demonstrated in spleen cells from OVA-containing SucPG-modified liposomes in vitro. These results suggest that the pH-sensitive fusogenic polymer-(SucPG-) modified liposomes would serve effectively as an antigen delivery vehicle for inducing Th1 and Th2 immune responses.
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Fonseca AC, Ferreira P, Cordeiro RA, Mendonça PV, Góis JR, Gil MH, Coelho JFJ. Drug Delivery Systems for Predictive Medicine: Polymers as Tools for Advanced Applications. NEW STRATEGIES TO ADVANCE PRE/DIABETES CARE: INTEGRATIVE APPROACH BY PPPM 2013. [DOI: 10.1007/978-94-007-5971-8_16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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