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Nevagi RJ, Dai W, Khalil ZG, Hussein WM, Capon RJ, Skwarczynski M, Toth I. Self-assembly of trimethyl chitosan and poly(anionic amino acid)-peptide antigen conjugate to produce a potent self-adjuvanting nanovaccine delivery system. Bioorg Med Chem 2019; 27:3082-3088. [PMID: 31176567 DOI: 10.1016/j.bmc.2019.05.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/15/2019] [Accepted: 05/20/2019] [Indexed: 12/13/2022]
Abstract
Short peptides derived from virulent pathogen proteins are promising antigens for the development of vaccines against infectious diseases. However, in order to mimic the danger signals associated with natural infection and stimulate an adaptive immune response, peptide antigens must be co-delivered with immune adjuvants. In this study, a group A streptococcus (GAS) M-protein derived B-cell epitope: J8, and universal T-helper epitope P25 containing peptides, were chemically coupled with different anionic amino acid-based polymers. The poly(anionic amino acid)-peptide antigen conjugates were mixed with trimethyl chitosan (TMC) to produce self-adjuvanting nanoparticulate vaccine candidates. TMC from two different sources were used to analyse their effect on immunogenicity. The nanoparticles produced from a peptide modified with 10 residues of polyglutamic acid and fungal TMC (NP5) stimulated production of the highest levels of serum antibodies in outbred mice. These antibodies were opsonic against all clinical GAS isolates tested.
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Affiliation(s)
- Reshma J Nevagi
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Wei Dai
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Zeinab G Khalil
- Institute of Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Waleed M Hussein
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; Helwan University, Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Ein Helwan, Helwan 11795, Egypt
| | - Robert J Capon
- Institute of Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Mariusz Skwarczynski
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Istvan Toth
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; Institute of Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia.
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Nevagi RJ, Khalil ZG, Hussein WM, Powell J, Batzloff MR, Capon RJ, Good MF, Skwarczynski M, Toth I. Polyglutamic acid-trimethyl chitosan-based intranasal peptide nano-vaccine induces potent immune responses against group A streptococcus. Acta Biomater 2018; 80:278-287. [PMID: 30266637 DOI: 10.1016/j.actbio.2018.09.037] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 09/17/2018] [Accepted: 09/24/2018] [Indexed: 01/03/2023]
Abstract
Peptide-based vaccines have the potential to overcome the limitations of classical vaccines; however, their use is hampered by a lack of carriers and adjuvants suitable for human use. In this study, an efficient self-adjuvanting peptide vaccine delivery system was developed based on the ionic interactions between cationic trimethyl chitosan (TMC) and a peptide antigen coupled with synthetically defined anionic α-poly-(l-glutamic acid) (PGA). The antigen, possessing a conserved B-cell epitope derived from the group A streptococcus (GAS) pathogen and a universal T-helper epitope, was conjugated to PGA using cycloaddition reaction. The produced anionic conjugate formed nanoparticles (NP-1) through interaction with cationic TMC. These NP-1 induced higher systemic and mucosal antibody titers compared to antigen adjuvanted with standard mucosal adjuvant cholera toxin B subunit or antigen mixed with TMC. The produced serum antibodies were also opsonic against clinically isolated GAS strains. Further, a reduction in bacterial burden was observed in nasal secretions, pharyngeal surface and nasopharyngeal-associated lymphoid tissue of mice immunized with NP-1 in GAS challenge studies. Thus, conjugation of defined-length anionic polymer to peptide antigen as a means of formulating ionic interaction-based nanoparticles with cationic polymer is a promising strategy for peptide antigen delivery. STATEMENT OF SIGNIFICANCE: A self-adjuvanting delivery system is required for peptide vaccines to enhance antigen delivery to immune cells and generate systemic and mucosal immunity. Herein, we developed a novel self-adjuvanting nanoparticulate delivery system for peptide antigens by combining polymer-conjugation and complexation strategies. We conjugated peptide antigen with anionic α-poly-(l-glutamic acid) that in turn, formed nanoparticles with cationic trimethyl chitosan by ionic interactions, without using external crosslinker. On intranasal administration to mice, these nanoparticles induced systemic and mucosal immunity, at low dose. Additionally, nanoparticles provided protection to vaccinated mice against group A streptococcus infection. Thus, this concept should be particularly useful in developing nanoparticles for the delivery of peptide antigens.
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Affiliation(s)
- Reshma J Nevagi
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Zeinab G Khalil
- Institute of Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia; Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Waleed M Hussein
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Jessica Powell
- Institute of Glycomics, Griffith University, Gold Coast, QLD 4215, Australia
| | - Michael R Batzloff
- Institute of Glycomics, Griffith University, Gold Coast, QLD 4215, Australia
| | - Robert J Capon
- Institute of Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Michael F Good
- Institute of Glycomics, Griffith University, Gold Coast, QLD 4215, Australia
| | - Mariusz Skwarczynski
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Istvan Toth
- School of Chemistry & Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia; Institute of Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia; School of Pharmacy, The University of Queensland, Woolloongabba, QLD 4102, Australia.
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Maxwell T, Banu T, Price E, Tharkur J, Campos MGN, Gesquiere A, Santra S. Non-Cytotoxic Quantum Dot-Chitosan Nanogel Biosensing Probe for Potential Cancer Targeting Agent. NANOMATERIALS 2015; 5:2359-2379. [PMID: 28347126 PMCID: PMC5304800 DOI: 10.3390/nano5042359] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 12/04/2015] [Accepted: 12/15/2015] [Indexed: 11/16/2022]
Abstract
Quantum dot (Qdot) biosensors have consistently provided valuable information to researchers about cellular activity due to their unique fluorescent properties. Many of the most popularly used Qdots contain cadmium, posing the risk of toxicity that could negate their attractive optical properties. The design of a non-cytotoxic probe usually involves multiple components and a complex synthesis process. In this paper, the design and synthesis of a non-cytotoxic Qdot-chitosan nanogel composite using straight-forward cyanogen bromide (CNBr) coupling is reported. The probe was characterized by spectroscopy (UV-Vis, fluorescence), microscopy (Fluorescence, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Dynamic Light Scattering. This activatable (“OFF”/“ON”) probe contains a core–shell Qdot (CdS:Mn/ZnS) capped with dopamine, which acts as a fluorescence quencher and a model drug. Dopamine capped “OFF” Qdots can undergo ligand exchange with intercellular glutathione, which turns the Qdots “ON” to restore fluorescence. These Qdots were then coated with chitosan (natural biocompatible polymer) functionalized with folic acid (targeting motif) and Fluorescein Isothiocyanate (FITC; fluorescent dye). To demonstrate cancer cell targetability, the interaction of the probe with cells that express different folate receptor levels was analyzed, and the cytotoxicity of the probe was evaluated on these cells and was shown to be nontoxic even at concentrations as high as 100 mg/L.
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Affiliation(s)
- Tyler Maxwell
- Department of Chemistry, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, USA.
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
| | - Tahmina Banu
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
- Department of Material Science and Engineering, University of Central Florida, 127600 Pegasus Drive, Engineering 1, Suite 207, Orlando, FL 32816, USA.
| | - Edward Price
- Department of Chemistry, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, USA.
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
| | - Jeremy Tharkur
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, 6900 Lake Nona Boulevard, Orlando, FL 32827, USA.
| | - Maria Gabriela Nogueira Campos
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
- Institute of Science and Technology, Federal University of Alfenas, Rodovia José Aurélio Vilela, 11999, Poços de Caldas, MG 37715-400, Brazil.
| | - Andre Gesquiere
- Department of Chemistry, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, USA.
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
- Department of Material Science and Engineering, University of Central Florida, 127600 Pegasus Drive, Engineering 1, Suite 207, Orlando, FL 32816, USA.
- College of Optics and Photonics, University of Central Florida, P.O. Box 162700, Orlando, FL 32816, USA.
| | - Swadeshmukul Santra
- Department of Chemistry, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, USA.
- NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, FL 32826, USA.
- Department of Material Science and Engineering, University of Central Florida, 127600 Pegasus Drive, Engineering 1, Suite 207, Orlando, FL 32816, USA.
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, 6900 Lake Nona Boulevard, Orlando, FL 32827, USA.
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Nanoparticles incorporating pH-responsive surfactants as a viable approach to improve the intracellular drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 57:100-6. [PMID: 26354244 DOI: 10.1016/j.msec.2015.07.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/13/2015] [Accepted: 07/14/2015] [Indexed: 12/13/2022]
Abstract
The pH-responsive delivery systems have brought new advances in the field of functional nanodevices and might allow more accurate and controllable delivery of specific cargoes, which is expected to result in promising applications in different clinical therapies. Here we describe a family of chitosan-TPP (tripolyphosphate) nanoparticles (NPs) for intracellular drug delivery, which were designed using two pH-sensitive amino acid-based surfactants from the family N(α),N(ε)-dioctanoyl lysine as bioactive compounds. Low and medium molecular weight chitosan (LMW-CS and MMW-CS, respectively) were used for NP preparation, and it was observed that the size distribution for NPs with LMW-CS were smaller (~168 nm) than that for NPs prepared with MMW-CS (~310 nm). Hemolysis assay demonstrated the pH-dependent biomembrane disruptional capability of the constructed NPs. The nanostructures incorporating the surfactants cause negligible membrane permeabilization at pH7.4. However, at acidic pH, prevailing in endosomes, membrane-destabilizing activity in an erythrocyte lysis assay became evident. When pH decreased to 6.6 and 5.4, hemolytic capability of chitosan NPs increased along with the raise of concentration. Furthermore, studies with cell culture showed that these pH-responsive NPs displayed low cytotoxic effects against 3T3 fibroblasts. The influence of chitosan molecular weight, chitosan to TPP weight ratio, nanoparticle size and nature of the surfactant counterion on the membrane-disruptive properties of nanoparticles was discussed in detail. Altogether, the results achieved here showed that by inserting the lysine-based amphiphiles into chitosan NPs, pH-sensitive membranolytic and potentially endosomolytic nanocarriers were developed, which, therefore, demonstrated ideal feasibility for intracellular drug delivery.
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Li K, Sun H, Sui H, Zhang Y, Liang H, Wu X, Zhao Q. Composite mesoporous silica nanoparticle/chitosan nanofibers for bone tissue engineering. RSC Adv 2015. [DOI: 10.1039/c4ra15232h] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel MSN/CTS composite nanofibrous scaffold shows improved mechanical properties and enhances the attachment, proliferation and biomineralization of osteoblasts.
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Affiliation(s)
- Kai Li
- Department of orthopaedics
- Shanghai First People's Hospital
- School of Medicine
- Shanghai Jiao Tong University
- Shanghai 200080
| | - Hailang Sun
- Department of Orthopaedics
- Huai'an First people's hospital
- Nanjing Medical University
- Huai'an 223300
- P. R. China
| | - Haitao Sui
- Department of Orthopaedics
- Dongying people's hospital
- Dongying
- P. R. China
| | - Yongxing Zhang
- Department of orthopaedics
- Shanghai First People's Hospital
- School of Medicine
- Shanghai Jiao Tong University
- Shanghai 200080
| | - He Liang
- Department of orthopaedics
- Shanghai First People's Hospital
- School of Medicine
- Shanghai Jiao Tong University
- Shanghai 200080
| | - Xiaofeng Wu
- Department of orthopaedics
- Shanghai First People's Hospital
- School of Medicine
- Shanghai Jiao Tong University
- Shanghai 200080
| | - Qinghua Zhao
- Department of orthopaedics
- Shanghai First People's Hospital
- School of Medicine
- Shanghai Jiao Tong University
- Shanghai 200080
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