1
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Brans V, Gray MD, Sezgin E, Stride EPJ. Protein-Decorated Microbubbles for Ultrasound-Mediated Cell Surface Manipulation. ACS APPLIED BIO MATERIALS 2023; 6:5746-5758. [PMID: 38048163 PMCID: PMC10731656 DOI: 10.1021/acsabm.3c00861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/14/2023] [Accepted: 11/20/2023] [Indexed: 12/06/2023]
Abstract
Delivering cargo to the cell membranes of specific cell types in the body is a major challenge for a range of treatments, including immunotherapy. This study investigates employing protein-decorated microbubbles (MBs) and ultrasound (US) to "tag" cellular membranes of interest with a specific protein. Phospholipid-coated MBs were produced and functionalized with a model protein using a metallochelating complex through an NTA(Ni) and histidine residue interaction. Successful "tagging" of the cellular membrane was observed using microscopy in adherent cells and was promoted by US exposure. Further modification of the MB surface to enable selective binding to target cells was then achieved by functionalizing the MBs with a targeting protein (transferrin) that specifically binds to a receptor on the target cell membrane. Attachment and subsequent transfer of material from MBs functionalized with transferrin to the target cells significantly increased, even in the absence of US. This work demonstrates the potential of these MBs as a platform for the noninvasive delivery of proteins to the surface of specific cell types.
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Affiliation(s)
- Veerle
A. Brans
- Department
of Engineering Science, Institute of Biomedical Engineering, University of Oxford, Oxford OX3 7DL, U.K.
| | - Michael D. Gray
- Department
of Engineering Science, Institute of Biomedical Engineering, University of Oxford, Oxford OX3 7DL, U.K.
| | - Erdinc Sezgin
- Science
for Life Laboratory, Department of Women’s and Children’s
Health, Karolinska Institutet, 17165 Solna, Sweden
| | - Eleanor P. J. Stride
- Department
of Engineering Science, Institute of Biomedical Engineering, University of Oxford, Oxford OX3 7DL, U.K.
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2
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Badten A, Ramirez A, Hernandez-Davies JE, Albin TJ, Jain A, Nakajima R, Felgner J, Davies DH, Wang SW. Protein Nanoparticle-Mediated Delivery of Recombinant Influenza Hemagglutinin Enhances Immunogenicity and Breadth of the Antibody Response. ACS Infect Dis 2023; 9:239-252. [PMID: 36607269 PMCID: PMC9926493 DOI: 10.1021/acsinfecdis.2c00362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Indexed: 01/07/2023]
Abstract
The vast majority of seasonal influenza vaccines administered each year are derived from virus propagated in eggs using technology that has changed little since the 1930s. The immunogenicity, durability, and breadth of response would likely benefit from a recombinant nanoparticle-based approach. Although the E2 protein nanoparticle (NP) platform has been previously shown to promote effective cell-mediated responses to peptide epitopes, it has not yet been reported to deliver whole protein antigens. In this study, we synthesized a novel maleimido tris-nitrilotriacetic acid (NTA) linker to couple protein hemagglutinin (HA) from H1N1 influenza virus to the E2 NP, and we evaluated the HA-specific antibody responses using protein microarrays. We found that recombinant H1 protein alone is immunogenic in mice but requires two boosts for IgG to be detected and is strongly IgG1 (Th2) polarized. When conjugated to E2 NPs, IgG2c is produced leading to a more balanced Th1/Th2 response. Inclusion of the Toll-like receptor 4 agonist monophosphoryl lipid A (MPLA) significantly enhances the immunogenicity of H1-E2 NPs while retaining the Th1/Th2 balance. Interestingly, broader homo- and heterosubtypic cross-reactivity is also observed for conjugated H1-E2 with MPLA, compared to unconjugated H1 with or without MPLA. These results highlight the potential of an NP-based delivery of HA for tuning the immunogenicity, breadth, and Th1/Th2 balance generated by recombinant HA-based vaccination. Furthermore, the modularity of this protein-protein conjugation strategy may have utility for future vaccine development against other human pathogens.
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Affiliation(s)
- Alexander
J. Badten
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Aaron Ramirez
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Jenny E. Hernandez-Davies
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Tyler J. Albin
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Aarti Jain
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Rie Nakajima
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Jiin Felgner
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - D. Huw Davies
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
| | - Szu-Wen Wang
- Department
of Chemical and Biomolecular Engineering, Vaccine Research and Development
Center, Department of Physiology and Biophysics, Department of Chemistry, Department of Biomedical
Engineering, Chao Family Comprehensive Cancer Center, Institute for Immunology, University of California, Irvine, California 92697, United States
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3
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Chung YH, Volckaert BA, Steinmetz NF. Development of a Modular NTA:His Tag Viral Vaccine for Co-delivery of Antigen and Adjuvant. Bioconjug Chem 2023; 34:269-278. [PMID: 36608270 PMCID: PMC10545220 DOI: 10.1021/acs.bioconjchem.2c00601] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The SARS-CoV-2 pandemic has highlighted the need for vaccines that are effective, but quickly produced. Of note, vaccines with plug-and-play capabilities that co-deliver antigen and adjuvant to the same cell have shown remarkable success. Our approach of utilizing a nitrilotriacetic acid (NTA) histidine (His)-tag chemistry with viral adjuvants incorporates both of these characteristics: plug-and-play and co-delivery. We specifically utilize the cowpea mosaic virus (CPMV) and the virus-like particles from bacteriophage Qβ as adjuvants and bind the model antigen ovalbumin (OVA). Successful binding of the antigen to the adjuvant/carrier was verified by SDS-PAGE, western blot, and ELISA. Immunization in C57BL/6J mice demonstrates that with Qβ - but not CPMV - there is an improved antibody response against the target antigen using the Qβ-NiNTA:His-OVA versus a simple admixture of antigen and adjuvant. Antibody isotyping also shows that formulation of the vaccines can alter T helper biases; while the Qβ-NiNTA:His-OVA particle produces a balanced Th1/Th2 bias the admixture was strongly Th2. In a mouse model of B16F10-OVA, we further demonstrate improved survival and slower tumor growth in the vaccine groups compared to controls. The NiNTA:His chemistry demonstrates potential for rapid development of future generation vaccines enabling plug-and-play capabilities with effectiveness boosted by co-delivery to the same cell.
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Affiliation(s)
- Young Hun Chung
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Britney A Volckaert
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
| | - Nicole F Steinmetz
- Department of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
- Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
- Department of Radiology, University of California, San Diego, La Jolla, California 92093, United States
- Institute for Materials Discovery and Design, University of California, San Diego, La Jolla, California 92093, United States
- Center for Nano-ImmunoEngineering, University of California, San Diego, La Jolla, California 92093, United States
- Center for Engineering in Cancer, Institute for Engineering in Medicine, University of California, San Diego, La Jolla, California 92093, United States
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4
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Zhou S, Luo Y, Lovell JF. Vaccine approaches for antigen capture by liposomes. Expert Rev Vaccines 2023; 22:1022-1040. [PMID: 37878481 PMCID: PMC10872528 DOI: 10.1080/14760584.2023.2274479] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 10/19/2023] [Indexed: 10/27/2023]
Abstract
INTRODUCTION Liposomes have been used as carriers for vaccine adjuvants and antigens due to their inherent biocompatibility and versatility as delivery vehicles. Two vial admixture of protein antigens with liposome-formulated immunostimulatory adjuvants has become a broadly used clinical vaccine preparation approach. Compared to freely soluble antigens, liposome-associated forms can enhance antigen delivery to antigen-presenting cells and co-deliver antigens with adjuvants, leading to improved vaccine efficacy. AREAS COVERED Several antigen-capture strategies for liposomal vaccines have been developed for proteins, peptides, and nucleic acids. Specific antigen delivery methodologies are discussed, including electrostatic adsorption, encapsulation inside the liposome aqueous core, and covalent and non-covalent antigen capture. EXPERT OPINION Several commercial vaccines include active lipid components, highlighting an increasingly prominent role of liposomes and lipid nanoparticles in vaccine development. Utilizing liposomes to associate antigens offers potential advantages, including antigen and adjuvant dose-sparing, co-delivery of antigen and adjuvant to immune cells, and enhanced immunogenicity. Antigen capture by liposomes has demonstrated feasibility in clinical testing. New antigen-capture techniques have been developed and appear to be of interest for vaccine development.
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Affiliation(s)
- Shiqi Zhou
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Yuan Luo
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Jonathan F Lovell
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, NY, USA
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5
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Raducanu VS, Isaioglou I, Raducanu DV, Merzaban JS, Hamdan SM. Simplified detection of polyhistidine-tagged proteins in gels and membranes using a UV-excitable dye and a multiple chelator head pair. J Biol Chem 2020; 295:12214-12223. [PMID: 32647010 PMCID: PMC7443479 DOI: 10.1074/jbc.ra120.014132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/29/2020] [Indexed: 12/22/2022] Open
Abstract
The polyhistidine tag (His-tag) is one of the most popular protein tags used in the life sciences. Traditionally, the detection of His-tagged proteins relies on immunoblotting with anti-His antibodies. This approach is laborious for certain applications, such as protein purification, where time and simplicity are critical. The His-tag can also be directly detected by metal ion-loaded nickel-nitrilotriacetic acid-based chelator heads conjugated to fluorophores, which is a convenient alternative method to immunoblotting. Typically, such chelator heads are conjugated to either green or red fluorophores, the detection of which requires specialized excitation sources and detection systems. Here, we demonstrate that post-run staining is ideal for His-tag detection by metal ion-loaded and fluorescently labeled chelator heads in PAGE and blot membranes. Additionally, by comparing the performances of different chelator heads, we show how differences in microscopic affinity constants translate to macroscopic differences in the detection limits in environments with limited diffusion, such as PAGE. On the basis of these results, we devise a simple approach, called UVHis-PAGE, that uses metal ion-loaded and fluorescently labeled chelator heads to detect His-tagged proteins in PAGE and blot membranes. Our method uses a UV transilluminator as an excitation source, and the results can be visually inspected by the naked eye.
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Affiliation(s)
- Vlad-Stefan Raducanu
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Ioannis Isaioglou
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Daniela-Violeta Raducanu
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Jasmeen S Merzaban
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Samir M Hamdan
- Division of Biological and Environmental Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
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6
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Wieneke R, Tampé R. Multivalent Chelators for In Vivo Protein Labeling. Angew Chem Int Ed Engl 2019; 58:8278-8290. [PMID: 30919542 DOI: 10.1002/anie.201811293] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Indexed: 01/09/2023]
Abstract
With the advent of single-molecule methods, chemoselective and site-specific labeling of proteins evolved to become a central aspect in chemical biology as well as cell biology. Protein labeling demands high specificity, rapid as well as efficient conjugation, while maintaining low concentration and biocompatibility under physiological conditions. Generic methods that do not interfere with the function, dynamics, subcellular localization of proteins, and crosstalk with other factors are crucial to probe and image proteins in vitro and in living cells. Alternatives to enzyme-based tags or autofluorescent proteins are short peptide-based recognition tags. These tags provide high specificity, enhanced binding rates, bioorthogonality, and versatility. Here, we report on recent applications of multivalent chelator heads, recognizing oligohistidine-tagged proteins. The striking features of this system has facilitated the analysis of protein complexes by single-molecule approaches.
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Affiliation(s)
- Ralph Wieneke
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue Str. 9, 60438, Frankfurt/M., Germany
| | - Robert Tampé
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue Str. 9, 60438, Frankfurt/M., Germany
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7
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Wieneke R, Tampé R. Multivalent Chelators for In Vivo Protein Labeling. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ralph Wieneke
- Institute of BiochemistryBiocenterGoethe University Frankfurt Max-von-Laue Str. 9 60438 Frankfurt/M. Germany
| | - Robert Tampé
- Institute of BiochemistryBiocenterGoethe University Frankfurt Max-von-Laue Str. 9 60438 Frankfurt/M. Germany
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8
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Gargett T, Abbas MN, Rolan P, Price JD, Gosling KM, Ferrante A, Ruszkiewicz A, Atmosukarto IIC, Altin J, Parish CR, Brown MP. Phase I trial of Lipovaxin-MM, a novel dendritic cell-targeted liposomal vaccine for malignant melanoma. Cancer Immunol Immunother 2018; 67:1461-1472. [PMID: 30014244 PMCID: PMC11028356 DOI: 10.1007/s00262-018-2207-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 07/09/2018] [Indexed: 01/10/2023]
Abstract
INTRODUCTION In this phase I study using a 3 + 3 dose escalation design, the safety, dose-limiting toxicity (DLT), immunogenicity and efficacy of intravenous Lipovaxin-MM-a multi-component dendritic cell-targeted liposomal vaccine against metastatic melanoma-was investigated. METHODS Twelve subjects with metastatic cutaneous melanoma were recruited in three cohorts. Patients in Cohort A (n = 3) and Cohort B (n = 3) received three doses of 0.1 and 1 mL of Lipovaxin-MM, respectively, every 4 weeks. Patients in Cohort C (n = 6) received four doses of 3 mL vaccine weekly. Immunologic assessments of peripheral blood were made at regular intervals and included leukocyte subsets, cytokine levels, and Lipovaxin-MM-specific T-cell and antibody reactivities. Tumor responses were assessed by RECIST v1.0 at screening, then 8 weekly in Cohorts A and B and 6 weekly in Cohort C. RESULTS Of a total of 94 adverse events (AEs) reported in ten subjects, 43 AEs in six subjects were considered to be possibly or probably vaccine-related. Most (95%) vaccine-related AEs were grade 1 or 2, two (5%) grade 3 vaccine-related AEs of anemia and lethargy were recorded, and higher grade AEs and DLTs were not observed. No consistent evidence of vaccine-specific humoral or cellular immune responses was found in post-immunization blood samples. One patient had a partial response, two patients had stable disease, and the remaining patients had progressive disease. CONCLUSIONS Lipovaxin-MM was well tolerated and without clinically significant toxicity. Immunogenicity of Lipovaxin-MM was not detected. Partial response and stable disease were observed in one and two patients, respectively.
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Affiliation(s)
- Tessa Gargett
- Center for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
| | - M Nazim Abbas
- Cancer Clinical Trials Unit, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Paul Rolan
- School of Medicine, The University of Adelaide, Adelaide, SA, Australia
| | | | | | - Antonio Ferrante
- School of Medicine, The University of Adelaide, Adelaide, SA, Australia
- Department of Immunopathology, SA Pathology, Women's and Children's Hospital, Adelaide, SA, Australia
- Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Andrew Ruszkiewicz
- Center for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia
- Division of Anatomical Pathology, SA Pathology, Adelaide, SA, Australia
| | | | - Joseph Altin
- Division of Biomedical Science and Biochemistry, Research School of Biology, Australian National University, Canberra, ACT, Australia
| | - Christopher R Parish
- ACRF Department of Cancer Biology and Therapeutics, the John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - Michael P Brown
- Center for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA, Australia.
- Cancer Clinical Trials Unit, Royal Adelaide Hospital, Adelaide, SA, Australia.
- School of Medicine, The University of Adelaide, Adelaide, SA, Australia.
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9
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Gatterdam K, Joest EF, Gatterdam V, Tampé R. The Scaffold Design of Trivalent Chelator Heads Dictates Affinity and Stability for Labeling His-tagged Proteins in vitro and in Cells. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802746] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Karl Gatterdam
- Institute of Biochemistry; Biocenter; Goethe University Frankfurt; Max-von-Laue-Str. 9 60438 Frankfurt/M Germany
| | - Eike F. Joest
- Institute of Biochemistry; Biocenter; Goethe University Frankfurt; Max-von-Laue-Str. 9 60438 Frankfurt/M Germany
| | - Volker Gatterdam
- Institute of Biochemistry; Biocenter; Goethe University Frankfurt; Max-von-Laue-Str. 9 60438 Frankfurt/M Germany
| | - Robert Tampé
- Institute of Biochemistry; Biocenter; Goethe University Frankfurt; Max-von-Laue-Str. 9 60438 Frankfurt/M Germany
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10
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Gatterdam K, Joest EF, Gatterdam V, Tampé R. The Scaffold Design of Trivalent Chelator Heads Dictates Affinity and Stability for Labeling His-tagged Proteins in vitro and in Cells. Angew Chem Int Ed Engl 2018; 57:12395-12399. [PMID: 29845721 DOI: 10.1002/anie.201802746] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/01/2018] [Indexed: 11/08/2022]
Abstract
Small chemical/biological interaction pairs are at the forefront in tracing protein function and interaction at high signal-to-background ratios in cellular pathways. However, the optimal design of scaffold, linker, and chelator head still deserve systematic investigation to achieve the highest affinity and kinetic stability for in vitro and especially cellular applications. We report on a library of N-nitrilotriacetic acid (NTA)-based multivalent chelator heads (MCHs) built on linear, cyclic, and dendritic scaffolds and compare these with regard to their binding affinity and stability for the labeling of cellular His-tagged proteins. Furthermore, we describe a new approach for tracing cellular target proteins at picomolar probe concentrations in cells. Finally, we outline fundamental differences between the MCH scaffolds and define a cyclic trisNTA chelator that displays the highest affinity and kinetic stability of all reported reversible, low-molecular-weight interaction pairs.
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Affiliation(s)
- Karl Gatterdam
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt/M, Germany
| | - Eike F Joest
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt/M, Germany
| | - Volker Gatterdam
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt/M, Germany
| | - Robert Tampé
- Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt/M, Germany
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11
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Pejawar-Gaddy S, Kovacs JM, Barouch DH, Chen B, Irvine DJ. Design of lipid nanocapsule delivery vehicles for multivalent display of recombinant Env trimers in HIV vaccination. Bioconjug Chem 2014; 25:1470-8. [PMID: 25020048 PMCID: PMC4140538 DOI: 10.1021/bc5002246] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
Immunization strategies that elicit
antibodies capable of neutralizing
diverse virus strains will likely be an important part of a successful
vaccine against HIV. However, strategies to promote robust humoral
responses against the native intact HIV envelope trimer structure
are lacking. We recently developed chemically cross-linked lipid nanocapsules
as carriers of molecular adjuvants and encapsulated or surface-displayed
antigens, which promoted follicular helper T-cell responses and elicited
high-avidity, durable antibody responses to a candidate malaria antigen.
To apply this system to the delivery of HIV antigens, Env gp140 trimers
with terminal his-tags (gp140T-his) were anchored to the surface of
lipid nanocapsules via Ni-NTA-functionalized lipids. Initial experiments
revealed that the large (409 kDa), heavily glycosylated trimers were
capable of extracting fluid phase lipids from the membranes of nanocapsules.
Thus, liquid-ordered and/or gel-phase lipid compositions were required
to stably anchor trimers to the particle membranes. Trimer-loaded
nanocapsules combined with the clinically relevant adjuvant monophosphoryl
lipid A primed high-titer antibody responses in mice at antigen doses
ranging from 5 μg to as low as 100 ng, whereas titers dropped
more than 50-fold over the same dose range when soluble trimer was
mixed with a strong oil-in-water adjuvant comparator. Nanocapsule
immunization also broadened the number of distinct epitopes on the
HIV trimer recognized by the antibody response. These results suggest
that nanocapsules displaying HIV trimers in an oriented, multivalent
presentation can promote key aspects of the humoral response against
Env immunogens.
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Affiliation(s)
- Sharmila Pejawar-Gaddy
- Department of Biological Engineering, #Koch Institute for Integrative Cancer Research, and ¶Department of Material Science, Engineering, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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12
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Kohli AG, Kierstead PH, Venditto VJ, Walsh CL, Szoka FC. Designer lipids for drug delivery: from heads to tails. J Control Release 2014; 190:274-87. [PMID: 24816069 DOI: 10.1016/j.jconrel.2014.04.047] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 04/16/2014] [Accepted: 04/25/2014] [Indexed: 12/30/2022]
Abstract
For four decades, liposomes composed of both naturally occurring and synthetic lipids have been investigated as delivery vehicles for low molecular weight and macromolecular drugs. These studies paved the way for the clinical and commercial success of a number of liposomal drugs, each of which required a tailored formulation; one liposome size does not fit all drugs! Instead, the physicochemical properties of the liposome must be matched to the pharmacology of the drug. An extensive biophysical literature demonstrates that varying lipid composition can influence the size, membrane stability, in vivo interactions, and drug release properties of a liposome. In this review we focus on recently described synthetic lipid headgroups, linkers and hydrophobic domains that can provide control over the intermolecular forces, phase preference, and macroscopic behavior of liposomes. These synthetic lipids further our understanding of lipid biophysics, promote targeted drug delivery and improve liposome stability. We further highlight the immune reactivity of novel synthetic headgroups as a key design consideration. For instance it was originally thought that synthetic PEGylated lipids were immunologically inert; however, it's been observed that under certain conditions PEGylated lipids induce humoral immunity. Such immune activation may be a limitation to the use of other engineered lipid headgroups for drug delivery. In addition to the potential immunogenicity of engineered lipids, future investigations on liposome drugs in vivo should pay particular attention to the location and dynamics of payload release.
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Affiliation(s)
- Aditya G Kohli
- The UC-Berkeley-UCSF Graduate Program in Bioengineering, University of California Berkeley, Berkeley 94720, USA; Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA
| | - Paul H Kierstead
- Department of Chemistry, University of California, Berkeley 94720, USA
| | - Vincent J Venditto
- Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA
| | - Colin L Walsh
- The UC-Berkeley-UCSF Graduate Program in Bioengineering, University of California Berkeley, Berkeley 94720, USA; Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA
| | - Francis C Szoka
- The UC-Berkeley-UCSF Graduate Program in Bioengineering, University of California Berkeley, Berkeley 94720, USA; Department of Bioengineering, Therapeutic Sciences and Pharmaceutical Chemistry, University of California San Francisco, San Francisco 94143, USA.
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13
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You C, Piehler J. Multivalent chelators for spatially and temporally controlled protein functionalization. Anal Bioanal Chem 2014; 406:3345-57. [DOI: 10.1007/s00216-014-7803-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 03/26/2014] [Accepted: 03/31/2014] [Indexed: 12/30/2022]
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Watson DS, Endsley AN, Huang L. Design considerations for liposomal vaccines: influence of formulation parameters on antibody and cell-mediated immune responses to liposome associated antigens. Vaccine 2012; 30:2256-72. [PMID: 22306376 DOI: 10.1016/j.vaccine.2012.01.070] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 01/19/2012] [Accepted: 01/23/2012] [Indexed: 02/06/2023]
Abstract
Liposomes (phospholipid bilayer vesicles) are versatile and robust delivery systems for induction of antibody and T lymphocyte responses to associated subunit antigens. In the last 15 years, liposome vaccine technology has matured and now several vaccines containing liposome-based adjuvants have been approved for human use or have reached late stages of clinical evaluation. Given the intensifying interest in liposome-based vaccines, it is important to understand precisely how liposomes interact with the immune system and stimulate immunity. It has become clear that the physicochemical properties of liposomal vaccines - method of antigen attachment, lipid composition, bilayer fluidity, particle charge, and other properties - exert dramatic effects on the resulting immune response. Here, we present a comprehensive review of the physicochemical properties of liposomal vaccines and how they influence immune responses. A discussion of novel and emerging immunomodulators that are suitable for inclusion in liposomal vaccines is also presented. Through a comprehensive analysis of the body of liposomal vaccine literature, we enumerate a series of principles that can guide the rational design of liposomal vaccines to elicit immune responses of a desired magnitude and quality. We also identify major unanswered questions in the field, pointing the direction for future study.
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Affiliation(s)
- Douglas S Watson
- Biosciences Division, SRI International, 140 Research Drive, Harrisonburg, VA 22802, United States. [corrected]
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15
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Benhabbour SR, Luft JC, Kim D, Jain A, Wadhwa S, Parrott MC, Liu R, DeSimone JM, Mumper RJ. In vitro and in vivo assessment of targeting lipid-based nanoparticles to the epidermal growth factor-receptor (EGFR) using a novel Heptameric ZEGFR domain. J Control Release 2011; 158:63-71. [PMID: 22037106 DOI: 10.1016/j.jconrel.2011.10.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 10/13/2011] [Accepted: 10/15/2011] [Indexed: 01/08/2023]
Abstract
Lipid-based oil-filled nanoparticles (NPs) with a high concentration of surface-chelated nickel (Ni-NPs) were successfully prepared using a Brij 78-NTA-Ni conjugate synthesized with Brij 78 (Polyoxyethylene (20) stearyl ether) and nitrilotriacetic acid (NTA). The facile incorporation of the Brij 78-NTA-Ni conjugate into the NP formulation allowed up to 90% Ni incorporation, which was a significant improvement over the previously used standard agent DOGS-NTA-Ni which led to ~6% Ni incorporation. The Ni-NPs were targeted to the highly epidermal growth factor receptor (EGFR)-overexpressing epidermoid carcinoma cells A431. This was accomplished using a novel high affinity histidine×6-tagged EGFR-binding Z domain (heptameric Z(EGFR) domain). In vitro cell uptake studies showed enhanced internalization (up to 90%) of the targeted Ni-NPs in A431 cells with only ≤10% internalization of the untargeted Ni-NPs. ICP-MS analysis used to quantify the amount of Ni in the cells were in close agreement with flow cytometry studies, which showed a dose dependent increase in the amount of Ni with the targeted Ni-NPs. Cell uptake competition studies showed that internalization of the targeted Ni-NPs within the cells was competed off with free heptameric Z(EGFR) domain at concentrations of 8.75ng/mL or higher. In vivo studies were carried out in nude mice bearing A431 tumors to determine the biodistribution and intracellular delivery. Near Infrared (NIR) optical imaging studies using Alexa750-labeled heptameric Z(EGFR) domain showed localization of 19% of the total detected fluorescence intensity in the tumor tissue, 28% in the liver and 42% in the kidneys 16h post i.v. injection. ICP-MS analysis showed almost a two-fold increase in the amount of intracellular Ni with the targeted Ni-NPs. These new Ni-NPs could be a very useful tool for targeting and drug delivery to a wide range of EGFR positive cancers.
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Affiliation(s)
- S Rahima Benhabbour
- Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, UNC Eshelman School of Pharmacy, USA
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16
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Laisne A, Ewald M, Ando T, Lesniewska E, Pompon D. Self-Assembly Properties and Dynamics of Synthetic Proteo–Nucleic Building Blocks in Solution and on Surfaces. Bioconjug Chem 2011; 22:1824-34. [DOI: 10.1021/bc2002264] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aude Laisne
- Centre de Génétique Moléculaire, CNRS, UPR3404, Avenue de la Terrasse, F91190 Gif-sur-Yvette, France
| | - Maxime Ewald
- Institut Carnot Bourgogne, UMR CNRS 5209, University of Bourgogne, F21078 Dijon, France
| | - Toshio Ando
- Department of Physics, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Eric Lesniewska
- Institut Carnot Bourgogne, UMR CNRS 5209, University of Bourgogne, F21078 Dijon, France
| | - Denis Pompon
- Centre de Génétique Moléculaire, CNRS, UPR3404, Avenue de la Terrasse, F91190 Gif-sur-Yvette, France
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17
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Multivalent and Flexible PEG-Nitrilotriacetic Acid Derivatives for Non-covalent Protein Pegylation. Pharm Res 2011; 28:2412-21. [DOI: 10.1007/s11095-011-0468-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Accepted: 04/29/2011] [Indexed: 12/29/2022]
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Faham A, Altin JG. Ag-bearing liposomes engrafted with peptides that interact with CD11c/CD18 induce potent Ag-specific and antitumor immunity. Int J Cancer 2011; 129:1391-403. [PMID: 21128234 DOI: 10.1002/ijc.25810] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 11/03/2010] [Indexed: 01/01/2023]
Abstract
Dendritic cells (DCs) play key role in eliciting antigen (Ag)-specific immune responses, and crucial to this is the uptake of Ag via surface receptors including the heterodimeric integrin CD11c/CD18. Here we report that CD11c/CD18-interacting peptides can be used as targeting moieties to deliver liposomal Ag to antigen presenting cells (APCs) and elicit Ag-specific and antitumor immunity. Two peptides of sequence related to human ICAM-4 and previously reported to bind CD11c/CD18, and a 12-mer cyclic peptide previously identified by phage display to bind CD11c/CD18, were produced synthetically, and tested for their ability to target liposomal Ag. The three peptides were designed to contain a shorter spacer to reduce steric hindrance, and a His-tag to enable engraftment onto liposomes incorporated with chelator lipid. Our results show that the three peptides, denoted as p17, p18 and p30, promote strong binding of liposomes to CD11c(+) and CD11b(+) cells in vitro and in vivo. Vaccination of mice with Ag-bearing liposomes engrafted with the peptides, particularly p18 and p30, induced Ag-specific T cell priming and antibody production. Importantly, the vaccination of C57BL/6 mice with syngeneic B16-OVA-derived plasma membrane vesicles (PMVs) engrafted with p18 and p30 peptide showed dramatic antitumor responses, inhibiting tumor growth/metastasis in both the lung and subcutaneous tumor models, with a high proportion of the mice apparently being "cured" of their tumors. The engraftment of p18 and p30 peptides onto liposomes and PMVs, thus provides an effective means to target Ags to DCs in vivo, for the development of effective cancer vaccines and immunotherapies.
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Affiliation(s)
- Abdus Faham
- Division of Biomedical Science and Biochemistry, Research School of Biology, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, Australia
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19
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Antibody response to polyhistidine-tagged peptide and protein antigens attached to liposomes via lipid-linked nitrilotriacetic acid in mice. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2010; 18:289-97. [PMID: 21159923 DOI: 10.1128/cvi.00425-10] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Particulate delivery systems enhance antibody responses to subunit antigens. However, covalent attachment of protein antigens can disrupt protein structure and mask critical epitopes, altering the antibody response to the antigen. In this report, we evaluate noncovalent metal chelation via nitrilotriacetic acid (NTA) as a nondestructive method to attach peptide and protein antigens to liposomes. Two model antigens, ovalbumin (OVA) and a peptide derived from the membrane-proximal region of HIV-1 gp41 (N-MPR), were polyhistidinylated and attached to liposomes via monovalent NTA (mono-NTA; K(D) [equilibrium dissociation constant], ∼10 μM), trivalent NTA (tris-NTA; K(D), ∼1 nM), or a covalent linkage. Attachment of N-MPR, but not OVA, to liposomes via an NTA lipid elicited stronger antibody responses in BALB/c mice than a formulation in which unassociated antigen was simply admixed with control liposomes lacking NTA. However, the tris-NTA linkage did not increase antibody responses to either N-MPR or OVA compared to the level for the mono-NTA linkage, despite the greater liposomal association of the antigen. For both antigens, covalently attaching them to a lipid elicited significantly stronger antibody responses than NTA-anchored antigens (OVA titer, 3.4 × 10(6) versus 1.4 × 10(6) to 1.6 × 10(6) [P < 0.001]; N-MPR titer, 4.4 × 10(4) versus 5.5 × 10(2) to 7.6 × 10(2) [P < 0.003]). The data indicate that NTA linkages may increase antibody titers to weak antigens such as N-MPR, but NTA-mediated attachment remains inferior to covalent conjugation. Moreover, enhancements in antigen-liposome affinity do not result in increased antibody titers. Thus, additional improvements of NTA-mediated conjugation technology are necessary to achieve an effective, nondestructive method for increasing the humoral response to antigens in particulate vaccines.
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20
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Platt V, Huang Z, Cao L, Tiffany M, Riviere K, Szoka FC. Influence of multivalent nitrilotriacetic acid lipid-ligand affinity on the circulation half-life in mice of a liposome-attached His6-protein. Bioconjug Chem 2010; 21:892-902. [PMID: 20384362 DOI: 10.1021/bc900448f] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Metal chelation-ligand interactions, such as occur between nitrilotriacetic acid (NTA)-nickel and multihistidines, enable the noncovalent attachment of histidine-modified proteins to liposomes and other particles. We compared three lipids: a mono-NTA lipid (ca. 10 microM affinity) and two tris-NTA lipid derivatives (ca. 3 nM and 0.2 nM affinity) in their ability to retain two different his(6)-containing proteins on NTA-liposomes in the presence of serum or plasma and after intravenous injection in mice. At nanomolar affinities, the off-rate of a his(6)-ligand is sufficiently long so that his(6)-proteins attached to particle surfaces will remain with the particle for hours; thus, we hypothesized that the increased his(6) affinity of multivalent NTA-modified liposomes would retain his(6)-proteins longer both in vitro and in vivo. For each of the three lipids, we found a robust association and complete activity retention of two his(6)-modified proteins: a far red-fluorescent protein, monomeric Katushka (mKate), and a prodrug-converting enzyme, yeast cytosine deaminase (yCD). Proteins associated more tightly in vitro with tris-NTA liposomes than with mono-NTA liposomes in the presence of refiltered fetal calf serum and mouse plasma. Free yCD exchanged with previously associated mKate for tris-NTA binding sites on the liposome surface. This exchange was due to the exchange of the proteins for NTA occupancy and not due to the exchange of tris-NTA lipid out of the liposome. The amount of yCD on the surface was similar if the proteins were co-associated or if mKate was pre-associated. This exchange confirms that NTA associated proteins are in a dynamic state and can exchange with multihistidine proteins in the biological milieu. There was no difference in circulation time of the protein when it was intravenously administered by itself or attached to any of the NTA-modified liposomes because in vivo the protein was rapidly released from the NTA liposomes. Upon recovery from blood, liposomes containing tris-NTA accumulated a different plasma protein profile than control liposomes, suggesting that Ni-NTA specifically interacts with some plasma proteins. The reason for the rapid protein dissociation from the liposome in vivo is not clear; it could be due to displacement by endogenous histidine-containing proteins or to natural chelators that remove nickel from the NTA. Regardless of the cause, improvements in chelator or ligand design are needed before metal chelation will be capable of retaining histidine-modified proteins on NTA liposomes after in vivo administration.
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Affiliation(s)
- Virginia Platt
- Joint Graduate Group in Bioengineering, University of California at San Francisco and Berkeley, San Francisco, California 94143, USA
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21
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Faham A, Altin JG. Antigen-containing liposomes engrafted with flagellin-related peptides are effective vaccines that can induce potent antitumor immunity and immunotherapeutic effect. THE JOURNAL OF IMMUNOLOGY 2010; 185:1744-54. [PMID: 20610649 DOI: 10.4049/jimmunol.1000027] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The bacterial protein flagellin can trigger immune responses to infections by interacting with TLR5 on APCs, and Ag-flagellin fusion proteins can act as effective vaccines. We report that flagellin-related peptides containing a His-tag and sequence related to conserved N-motif (aa 85-111) of FliC flagellin, purportedly involved in the interaction of flagellin with TLR5, can be used to target delivery of liposomal Ag to APCs in vitro and in vivo. When engrafted onto liposomes, two flagellin-related peptides, denoted as 9Flg and 42Flg, promoted strong liposome binding to murine bone marrow-derived dendritic cells and CD11c(+) splenocytes, and cell binding correlated with expression of TLR5. Liposomes engrafted with 9Flg or 42Flg induced functional MyD88-dependent maturation of dendritic cells in vivo. The vaccination of mice with 9Flg liposomes containing OVA induced OVA-specific T cell priming, increased the number of Ag-responsive IFN-gamma-producing CD8(+) T cells, and increased Ag-specific IgG(1) and IgG(2b) in serum. Importantly, the vaccination of C57BL/6 mice with syngeneic B16-OVA-derived plasma membrane vesicles, engrafted with 9Flg or 42Flg, potently inhibited tumor growth/metastasis and induced complete tumor regression in the majority of mice challenged with the syngeneic B16-OVA melanoma, in the lung and s.c. tumor models. Strong antitumor responses were also seen in studies using the s.c. P815 tumor model. Therefore, vaccination with Ag-containing liposomes engrafted with 9Flg or 42Flg is a powerful strategy to exploit the innate and adaptive immune systems for the development of potent vaccines and cancer immunotherapies.
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Affiliation(s)
- Abdus Faham
- Division of Biomedical Science and Biochemistry, Research School of Biology, College of Medicine, Biology and Environment, Australian National University, Canberra, Australia
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22
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Herringson TP, Patlolla RR, Altin JG. Targeting of plasmid DNA-lipoplexes to cells with molecules anchored via a metal chelator lipid. J Gene Med 2009; 11:1048-63. [DOI: 10.1002/jgm.1394] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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23
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Faham A, Bennett D, Altin JG. Liposomal Ag engrafted with peptides of sequence derived from HMGB1 induce potent Ag-specific and anti-tumour immunity. Vaccine 2009; 27:5846-54. [PMID: 19660589 DOI: 10.1016/j.vaccine.2009.07.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 07/13/2009] [Accepted: 07/18/2009] [Indexed: 10/20/2022]
Abstract
High-mobility group box 1 (HMGB1) protein is a nuclear binding protein which is released by monocytes and macrophages and is a potent maturation signal for dendritic cells (DCs). Synthetic HMGB1-related peptides are reported to be potent DC stimulants. Two HMGB1-related peptides, denoted as pHMGB-89 and pHMGB-106, were explored for their ability to enhance the immunogenicity of Ag-containing liposomes. pHMGB-engrafted liposomes targeted murine CD11c(+) and CD11b(+) cells in vitro and in vivo. Vaccination of mice with OVA-containing liposomes engrafted with pHMGB-89 and pHMGB-106 induced OVA-specific T cell priming and production of IgG(1), IgG(2a) and IgG(2b) antibodies. Importantly, vaccination of mice with B16-OVA-derived plasma membrane vesicles (PMVs) engrafted with pHMGB-89 and pHMGB-106 inhibited tumour growth and metastasis, in syngeneic mice challenged with highly metastatic B16-OVA melanoma. The results show that vaccination with Ag-containing liposomes/PMVs engrafted with HMGB1 peptides could be an effective approach for developing novel vaccines and cancer immunotherapies.
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Affiliation(s)
- Abdus Faham
- Biochemistry and Molecular Biology, Research School of Biology, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, 0200, Australia
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24
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Huang Z, Hwang P, Watson DS, Cao L, Szoka FC. Tris-nitrilotriacetic acids of subnanomolar affinity toward hexahistidine tagged molecules. Bioconjug Chem 2009; 20:1667-72. [PMID: 19650657 DOI: 10.1021/bc900309n] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitrilotriacetic acid (NTA) has moderate affinity (10 μM) for hexahistidine (His6) and is widely used in the purification of His6-tagged proteins. The affinity can be increased significantly (10 nM) through multivalency such as using a tris-NTA. We show that the binding affinity of tris-NTA is dependent on the flexibility and length of the spacer between the mono-NTA and the scaffold: the shorter the spacer, the higher the affinity. A series of biotinylated tris-NTA having different spacers were synthesized and used to prepare tris-NTA sensor chips for surface plasmon resonance measurement of binding affinity. Subnanomolar affinity can be achieved with a short spacer. The new high-affinity tris-NTA enables the formation of stable complexes with hexahistidine containing molecules and provides a convenient method to noncovalently attach proteins to various surfaces.
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Affiliation(s)
- Zhaohua Huang
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94143-0912, USA
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25
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Herringson TP, Altin JG. Convenient targeting of stealth siRNA-lipoplexes to cells with chelator lipid-anchored molecules. J Control Release 2009; 139:229-38. [PMID: 19595724 DOI: 10.1016/j.jconrel.2009.06.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2009] [Revised: 05/18/2009] [Accepted: 06/30/2009] [Indexed: 01/03/2023]
Abstract
A major obstacle for the use of siRNAs as novel therapeutics is the requirement for functional delivery to specific cells in vivo. siRNA delivery by cationic agents is generally non-specific and a convenient targeting strategy has been lacking. This work explored the potential for using the chelator lipid 3(nitrilotriacetic acid)-ditetradecylamine (NTA(3)-DTDA) with neutral stealth liposomes to target siRNA to cells. A novel method for incorporating siRNAs into lipoplexes was developed which utilised helper lipids and the ionisable lipid 1,2-dioleoyl-3-dimethylammonium-propane (DODAP). This approach results in an efficient (>50%) incorporation of siRNA into lipoplexes, which when incorporated with Ni-NTA(3)-DTDA and engrafted with a His-tagged form of murine CD4 can target siRNA to murine A20 B cells, in vitro. Also, siRNA-lipoplexes engrafted with His-tagged peptides that target receptors on HEK-293 cells, or the receptor for tumour necrosis factor alpha expressed on the murine dendritic cell line DC2.4, could target siRNA and silence the expression of enhanced green fluorescence protein (EGFP). siRNA-lipoplexes produced by this method are approximately 240 nm dia, exhibit low zeta-potential (-1 mV), and target cells in serum-containing media. The results show that NTA(3)-DTDA can be used to target siRNA-lipoplexes to cells, and could provide a convenient approach for targeting siRNA to cells in vivo for therapeutic applications.
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Affiliation(s)
- Thomas P Herringson
- Biochemistry and Molecular Biology, Research School of Biology, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, 0200, Australia
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26
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Hamzah J, Altin JG, Herringson T, Parish CR, Hämmerling GJ, O'Donoghue H, Ganss R. Targeted liposomal delivery of TLR9 ligands activates spontaneous antitumor immunity in an autochthonous cancer model. THE JOURNAL OF IMMUNOLOGY 2009; 183:1091-8. [PMID: 19561111 DOI: 10.4049/jimmunol.0900736] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Accessibility of tumors for highly effective local treatment represents a major challenge for anticancer therapy. Immunostimulatory oligodeoxynucleotides (ODN) with CpG motifs are ligands of TLR9, which prime spontaneous antitumor immunity, but are less effective when applied systemically. We therefore developed a liposome-based agent for selective delivery of CpG-ODN into the tumor environment. A peptide that specifically targets angiogenic endothelial cells in a transgenic tumor model for islet cell carcinogenesis was engrafted into CpG-ODN containing liposomes. Intravenous injection of these liposomes resulted in specific accumulation around tumor vessels, increased uptake by tumor-resident macrophages, and retention over time. In contrast, nontargeted liposomes did not localize to the tumor vasculature. Consequently, only vascular targeting of CpG-ODN liposomes provoked a marked inflammatory response at vessel walls with enhanced CD8(+) and CD4(+) T cell infiltration and, importantly, activation of spontaneous, tumor-specific cytotoxicity. In a therapeutic setting, 40% of tumor-bearing, transgenic mice survived beyond week 45 after systemic administration of vascular-directed CpG-ODN liposomes. In contrast, control mice survived up to 30 wk. Therapeutic efficacy was further improved by increasing the frequency of tumor-specific effector cells through adoptive transfers. NK cells and CD8(+) T cells were major effectors which induced tumor cell death and acted in conjunction with antivascular effects. Thus, tumor homing with CpG-ODN-loaded liposomes is as potent as direct injection of free CpG-ODN and has the potential to overcome some major limitations of conventional CpG-ODN monotherapy.
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Affiliation(s)
- Juliana Hamzah
- Western Australian Institute for Medical Research, University of Western Australia Centre for Medical Research, Perth, Australia
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27
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Fischer NO, Blanchette CD, Chromy BA, Kuhn EA, Segelke BW, Corzett M, Bench G, Mason PW, Hoeprich PD. Immobilization of His-Tagged Proteins on Nickel-Chelating Nanolipoprotein Particles. Bioconjug Chem 2009; 20:460-5. [DOI: 10.1021/bc8003155] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicholas O. Fischer
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Craig D. Blanchette
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Brett A. Chromy
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Edward A. Kuhn
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Brent W. Segelke
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Michele Corzett
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Graham Bench
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Peter W. Mason
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
| | - Paul D. Hoeprich
- Chemistry, Materials, Earth, and Life Sciences, Lawrence Livermore National Laboratory, Livermore, California 94551 and Department of Pathology and Microbiology & Immunology, University of Texas Medical Branch, Galveston, Texas 77555
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28
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Thompson DH, Zhou M, Grey J, Kim HK. Design, Synthesis, and Performance of NTA-modified Lipids as Templates for Histidine-tagged Protein Crystallization. CHEM LETT 2007. [DOI: 10.1246/cl.2007.956] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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29
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Altin JG, Parish CR. Liposomal vaccines--targeting the delivery of antigen. Methods 2007; 40:39-52. [PMID: 16997712 DOI: 10.1016/j.ymeth.2006.05.027] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Accepted: 05/05/2006] [Indexed: 01/05/2023] Open
Abstract
Vaccines that can prime the adaptive immune system for a quick and effective response against a pathogen or tumor cells, require the generation of antigen (Ag)-specific memory T and B cells. The unique ability of dendritic cells (DCs) to activate naïve T cells, implies a key role for DCs in this process. The generation of tumor-specific CD8(+) cytotoxic T cells (CTLs) is dependent on both T cell stimulation with Ag (peptide-MHC-complexes) and costimulation. Interestingly, tumor cells that lack expression of T cell costimulatory molecules become highly immunogenic when transfected to express such molecules on their surface. Adoptive immunotherapy with Ag-pulsed DCs also is a strategy showing promise as a treatment for cancer. The use of such cell-based vaccines, however, is cumbersome and expensive to use clinically, and/or may carry risks due to genetic manipulations. Liposomes are particulate vesicular lipid structures that can incorporate Ag, immunomodulatory factors and targeting molecules, and hence can serve as potent vaccines. Similarly, Ag-containing plasma membrane vesicles (PMV) derived from tumor cells can be modified to incorporate a T cell costimulatory molecule to provide both TCR stimulation, and costimulation. PMVs also can be modified to contain IFN-gamma and molecules for targeting DCs, permitting delivery of both Ag and a DC maturation signal for initiating an effective immune response. Our results show that use of such agents as vaccines can induce potent anti-tumor immune responses and immunotherapeutic effects in tumor models, and provide a strategy for the development of effective vaccines and immunotherapies for cancer and infectious diseases.
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Affiliation(s)
- Joseph G Altin
- School of Biochemistry and Molecular Biology, Faculty of Science, The Australian National University, Canberra, ACT 0200, Australia.
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30
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Altin JG, Banwell MG, Coghlan PA, Easton CJ, Nairn MR, Offermann DA. Synthesis of NTA3-DTDA — A Chelator-Lipid that Promotes Stable Binding of His-Tagged Proteins to Membranes. Aust J Chem 2006. [DOI: 10.1071/ch06112] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A six-step reaction sequence is described for the preparation of compound 1 (NTA3-DTDA), a membrane-penetrating and potent chelator that can be incorporated into liposomes and plasma membrane vesicles containing antigens and thus allowing targeted delivery of such assemblies to a variety of cells for the purposes of eliciting anti-tumour responses. Full spectroscopic characterization of this dendritic-type compound as well as certain of its precursors is reported.
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Abstract
We identified 1113 articles (103 reviews, 1010 primary research articles) published in 2005 that describe experiments performed using commercially available optical biosensors. While this number of publications is impressive, we find that the quality of the biosensor work in these articles is often pretty poor. It is a little disappointing that there appears to be only a small set of researchers who know how to properly perform, analyze, and present biosensor data. To help focus the field, we spotlight work published by 10 research groups that exemplify the quality of data one should expect to see from a biosensor experiment. Also, in an effort to raise awareness of the common problems in the biosensor field, we provide side-by-side examples of good and bad data sets from the 2005 literature.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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