1
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Nguyen DC, Song K, Jokonya S, Yazdani O, Sellers DL, Wang Y, Zakaria ABM, Pun SH, Stayton PS. Mannosylated STING Agonist Drugamers for Dendritic Cell-Mediated Cancer Immunotherapy. ACS Cent Sci 2024; 10:666-675. [PMID: 38559305 PMCID: PMC10979423 DOI: 10.1021/acscentsci.3c01310] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/22/2024] [Accepted: 02/06/2024] [Indexed: 04/04/2024]
Abstract
The Stimulator of Interferon Genes (STING) pathway is a promising target for cancer immunotherapy. Despite recent advances, therapies targeting the STING pathway are often limited by routes of administration, suboptimal STING activation, or off-target toxicity. Here, we report a dendritic cell (DC)-targeted polymeric prodrug platform (polySTING) that is designed to optimize intracellular delivery of a diamidobenzimidazole (diABZI) small-molecule STING agonist while minimizing off-target toxicity after parenteral administration. PolySTING incorporates mannose targeting ligands as a comonomer, which facilitates its uptake in CD206+/mannose receptor+ professional antigen-presenting cells (APCs) in the tumor microenvironment (TME). The STING agonist is conjugated through a cathepsin B-cleavable valine-alanine (VA) linker for selective intracellular drug release after receptor-mediated endocytosis. When administered intravenously in tumor-bearing mice, polySTING selectively targeted CD206+/mannose receptor+ APCs in the TME, resulting in increased cross-presenting CD8+ DCs, infiltrating CD8+ T cells in the TME as well as maturation across multiple DC subtypes in the tumor-draining lymph node (TDLN). Systemic administration of polySTING slowed tumor growth in a B16-F10 murine melanoma model as well as a 4T1 murine breast cancer model with an acceptable safety profile. Thus, we demonstrate that polySTING delivers STING agonists to professional APCs after systemic administration, generating efficacious DC-driven antitumor immunity with minimal side effects. This new polymeric prodrug platform may offer new opportunities for combining efficient targeted STING agonist delivery with other selective tumor therapeutic strategies.
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Affiliation(s)
- Dinh Chuong Nguyen
- Molecular
Engineering & Sciences Institute, University
of Washington, Seattle, Washington 98195, United States
| | - Kefan Song
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Simbarashe Jokonya
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Omeed Yazdani
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Drew L. Sellers
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Yonghui Wang
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - ABM Zakaria
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H. Pun
- Molecular
Engineering & Sciences Institute, University
of Washington, Seattle, Washington 98195, United States
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Patrick S. Stayton
- Molecular
Engineering & Sciences Institute, University
of Washington, Seattle, Washington 98195, United States
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
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2
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Song K, Pun SH. Design and Evaluation of Synthetic Delivery Formulations for Peptide-Based Cancer Vaccines. BME Front 2024; 5:0038. [PMID: 38515636 PMCID: PMC10956738 DOI: 10.34133/bmef.0038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/09/2024] [Indexed: 03/23/2024] Open
Abstract
With the recent advances in neoantigen identification, peptide-based cancer vaccines offer substantial potential in the field of immunotherapy. However, rapid clearance, low immunogenicity, and insufficient antigen-presenting cell (APC) uptake limit the efficacy of peptide-based cancer vaccines. This review explores the barriers hindering vaccine efficiency, highlights recent advancements in synthetic delivery systems, and features strategies for the key delivery steps of lymph node (LN) drainage, APC delivery, cross-presentation strategies, and adjuvant incorporation. This paper also discusses the design of preclinical studies evaluating vaccine efficiency, including vaccine administration routes and murine tumor models.
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Affiliation(s)
- Kefan Song
- Department of Bioengineering, University of Washington, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, USA
- Molecular Engineering & Sciences Institute, University of Washington, USA
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3
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Olshefsky A, Benasutti H, Sylvestre M, Butterfield GL, Rocklin GJ, Richardson C, Hicks DR, Lajoie MJ, Song K, Leaf E, Treichel C, Decarreau J, Ke S, Kher G, Carter L, Chamberlain JS, Baker D, King NP, Pun SH. In vivo selection of synthetic nucleocapsids for tissue targeting. Proc Natl Acad Sci U S A 2023; 120:e2306129120. [PMID: 37939083 PMCID: PMC10655225 DOI: 10.1073/pnas.2306129120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 09/21/2023] [Indexed: 11/10/2023] Open
Abstract
Controlling the biodistribution of protein- and nanoparticle-based therapeutic formulations remains challenging. In vivo library selection is an effective method for identifying constructs that exhibit desired distribution behavior; library variants can be selected based on their ability to localize to the tissue or compartment of interest despite complex physiological challenges. Here, we describe further development of an in vivo library selection platform based on self-assembling protein nanoparticles encapsulating their own mRNA genomes (synthetic nucleocapsids or synNCs). We tested two distinct libraries: a low-diversity library composed of synNC surface mutations (45 variants) and a high-diversity library composed of synNCs displaying miniproteins with binder-like properties (6.2 million variants). While we did not identify any variants from the low-diversity surface library that yielded therapeutically relevant changes in biodistribution, the high-diversity miniprotein display library yielded variants that shifted accumulation toward lungs or muscles in just two rounds of in vivo selection. Our approach should contribute to achieving specific tissue homing patterns and identifying targeting ligands for diseases of interest.
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Affiliation(s)
- Audrey Olshefsky
- Department of Bioengineering, University of Washington, Seattle, WA98195
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Halli Benasutti
- Department of Biochemistry, University of Washington, Seattle, WA98195
| | - Meilyn Sylvestre
- Department of Bioengineering, University of Washington, Seattle, WA98195
| | - Gabriel L. Butterfield
- Institute for Protein Design, University of Washington, Seattle, WA98195
- Department of Molecular and Cellular Biology, University of Washington, Seattle, WA98195
| | - Gabriel J. Rocklin
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Christian Richardson
- Department of Bioengineering, University of Washington, Seattle, WA98195
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Derrick R. Hicks
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Marc J. Lajoie
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Kefan Song
- Department of Bioengineering, University of Washington, Seattle, WA98195
| | - Elizabeth Leaf
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Catherine Treichel
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Justin Decarreau
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Sharon Ke
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Gargi Kher
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Lauren Carter
- Institute for Protein Design, University of Washington, Seattle, WA98195
| | - Jeffrey S. Chamberlain
- Department of Biochemistry, University of Washington, Seattle, WA98195
- Department of Neurology, University of Washington, Seattle, WA98195
| | - David Baker
- Institute for Protein Design, University of Washington, Seattle, WA98195
- Department of Biochemistry, University of Washington, Seattle, WA98195
| | - Neil P. King
- Institute for Protein Design, University of Washington, Seattle, WA98195
- Department of Biochemistry, University of Washington, Seattle, WA98195
| | - Suzie H. Pun
- Department of Bioengineering, University of Washington, Seattle, WA98195
- Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA98195
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4
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Pichon TJ, White NJ, Pun SH. ENGINEERED INTRAVENOUS THERAPIES FOR TRAUMA. Curr Opin Biomed Eng 2023; 27:100456. [PMID: 37456984 PMCID: PMC10343715 DOI: 10.1016/j.cobme.2023.100456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Trauma leading to severe hemorrhage and shock on average kills patients within 3 to 6 hours after injury. With average prehospital transport times reaching 1-6 hours in low- to middle-income countries, stopping the bleeding and reversing hemorrhagic shock is vital. First-generation intravenous hemostats rely on traditional drug delivery platforms, such as self-assembling systems, fabricated nanoparticles, and soluble polymers due to their active targeting, biodistribution, and safety. We discuss some challenges translating these therapies to patients, as very few have successfully made it through preclinical evaluation in large-animals, and none have translated to the clinic. Finally, we discuss the physiology of hemorrhagic shock, highlight a new low volume resuscitant (LVR) PEG-20k, and end with considerations for the rational design of LVRs.
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Affiliation(s)
- Trey J. Pichon
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15 Avenue NE, Box 355061, Seattle, Washington 98105, United States
- Resuscitation Engineering Science Unit (RESCU), Harborview Research and Training Building, Seattle, Washington 98104, United States
| | - Nathan J. White
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, Washington 98105, United States
- Resuscitation Engineering Science Unit (RESCU), Harborview Research and Training Building, Seattle, Washington 98104, United States
| | - Suzie H. Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15 Avenue NE, Box 355061, Seattle, Washington 98105, United States
- Resuscitation Engineering Science Unit (RESCU), Harborview Research and Training Building, Seattle, Washington 98104, United States
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5
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Ling M, Cardle II, Song K, Yan AJ, Kacherovsky N, Jensen MC, Pun SH. Aptamer-Based Chromatographic Methods for Efficient and Economical Separation of Leukocyte Populations. ACS Biomater Sci Eng 2023; 9:5062-5071. [PMID: 37467493 PMCID: PMC11016351 DOI: 10.1021/acsbiomaterials.3c00651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
The manufacturing process of chimeric antigen receptor T cell therapies includes isolation systems that provide pure T cells. Current magnetic-activated cell sorting and immunoaffinity chromatography methods produce desired cells with high purity and yield but require expensive equipment and reagents and involve time-consuming incubation steps. Here, we demonstrate that aptamers can be employed in a continuous-flow resin platform for both depletion of monocytes and selection of CD8+ T cells from peripheral blood mononuclear cells at low cost with high purity and throughput. Aptamer-mediated cell selection could potentially enable fully synthetic, traceless isolations of leukocyte subsets from a single isolation system.
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Affiliation(s)
- Melissa Ling
- Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195
| | - Ian I. Cardle
- Department of Bioengineering, University of Washington, Seattle, WA 98195
- Seattle Children’s Therapeutics, Seattle, WA 98101
| | - Kefan Song
- Department of Bioengineering, University of Washington, Seattle, WA 98195
| | - Alexander J. Yan
- Department of Bioengineering, University of Washington, Seattle, WA 98195
| | - Nataly Kacherovsky
- Department of Bioengineering, University of Washington, Seattle, WA 98195
| | | | - Suzie H. Pun
- Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195
- Department of Bioengineering, University of Washington, Seattle, WA 98195
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6
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Yang LF, Ling M, Kacherovsky N, Pun SH. Aptamers 101: aptamer discovery and in vitro applications in biosensors and separations. Chem Sci 2023; 14:4961-4978. [PMID: 37206388 PMCID: PMC10189874 DOI: 10.1039/d3sc00439b] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 04/14/2023] [Indexed: 05/21/2023] Open
Abstract
Aptamers are single-stranded nucleic acids that bind and recognize targets much like antibodies. Recently, aptamers have garnered increased interest due to their unique properties, including inexpensive production, simple chemical modification, and long-term stability. At the same time, aptamers possess similar binding affinity and specificity as their protein counterpart. In this review, we discuss the aptamer discovery process as well as aptamer applications to biosensors and separations. In the discovery section, we describe the major steps of the library selection process for aptamers, called systematic evolution of ligands by exponential enrichment (SELEX). We highlight common approaches and emerging strategies in SELEX, from starting library selection to aptamer-target binding characterization. In the applications section, we first evaluate recently developed aptamer biosensors for SARS-CoV-2 virus detection, including electrochemical aptamer-based sensors and lateral flow assays. Then we discuss aptamer-based separations for partitioning different molecules or cell types, especially for purifying T cell subsets for therapeutic applications. Overall, aptamers are promising biomolecular tools and the aptamer field is primed for expansion in biosensing and cell separation.
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Affiliation(s)
- Lucy F Yang
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington Seattle Washington USA
| | - Melissa Ling
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington Seattle Washington USA
| | - Nataly Kacherovsky
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington Seattle Washington USA
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington Seattle Washington USA
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7
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Song K, Nguyen DC, Luu T, Yazdani O, Roy D, Stayton PS, Pun SH. A mannosylated polymer with endosomal release properties for peptide antigen delivery. J Control Release 2023; 356:232-241. [PMID: 36878319 PMCID: PMC10693254 DOI: 10.1016/j.jconrel.2023.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 02/10/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023]
Abstract
Peptide cancer vaccines have had limited clinical success despite their safety, characterization and production advantages. We hypothesize that the poor immunogenicity of peptides can be surmounted by delivery vehicles that overcome the systemic, cellular and intracellular drug delivery barriers faced by peptides. Here, we introduce Man-VIPER, a self-assembling (40-50 nm micelles), pH-sensitive, mannosylated polymeric peptide delivery platform that targets dendritic cells in the lymph nodes, encapsulates peptide antigens at physiological pH, and facilitates endosomal release of antigens at acidic endosomal pH through a conjugated membranolytic peptide melittin. We used d-melittin to improve the safety profile of the formulation without compromising the lytic properties. We evaluated polymers with both releasable (Man-VIPER-R) or non-releasable (Man-VIPER-NR) d-melittin. Both Man-VIPER polymers exhibited superior endosomolysis and antigen cross-presentation compared to non-membranolytic d-melittin-free analogues (Man-AP) in vitro. In vivo, Man-VIPER polymers demonstrated an adjuvanting effect, induced the proliferation of antigen-specific cytotoxic T cells and helper T cells compared to free peptides and Man-AP. Remarkably, antigen delivery with Man-VIPER-NR generated significantly more antigen-specific cytotoxic T cells than Man-VIPER-R in vivo. As our candidate for a therapeutic vaccine, Man-VIPER-NR exerted superior efficacy in a B16F10-OVA tumor model. These results highlight Man-VIPER-NR as a safe and powerful peptide cancer vaccine platform for cancer immunotherapy.
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Affiliation(s)
- Kefan Song
- Department of Bioengineering, University of Washington, USA
| | - Dinh Chuong Nguyen
- Molecular Engineering & Sciences Institute, University of Washington, USA
| | - Tran Luu
- Department of Bioengineering, University of Washington, USA
| | - Omeed Yazdani
- Department of Bioengineering, University of Washington, USA
| | - Debashish Roy
- Department of Bioengineering, University of Washington, USA
| | - Patrick S Stayton
- Department of Bioengineering, University of Washington, USA; Molecular Engineering & Sciences Institute, University of Washington, USA.
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, USA; Molecular Engineering & Sciences Institute, University of Washington, USA.
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8
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Sellers DL, Lee K, Murthy N, Pun SH. TAxI-peptide targeted Cas12a ribonuclease protein nanoformulations increase genome editing in hippocampal neurons. J Control Release 2023; 354:188-195. [PMID: 36596342 PMCID: PMC9975068 DOI: 10.1016/j.jconrel.2022.12.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 12/19/2022] [Accepted: 12/28/2022] [Indexed: 01/05/2023]
Abstract
Gene therapy approaches that utilize Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) ribonucleases have tremendous potential to treat human disease. However, CRISPR therapies delivered by integrating viral vectors are limited by potential off-target genome editing caused by constitutive activation of ribonuclease functions. Thus, biomaterial formulations are being used for the delivery of purified CRISPR components to increase the efficiency and safety of genome editing approaches. We previously demonstrated that a novel peptide identified by phage display, TAxI-peptide, mediates delivery of recombinant proteins into neurons. In this report we utilized NeutrAvidin protein to formulate neuron-targeted genome-editing nanoparticles. Cas12a ribonucleases was loaded with biotinylated guide RNA and biotinylated TAxI-peptide onto NeutrAvidin protein to coordinate the formation a targeted ribonuclease protein (RNP) complex. TAxI-RNP complexes are polydisperse with a 14.3 nm radius. The nanoparticles are stable after formulation and show good stability in the presence of normal mouse serum. TAxI-RNP nanoparticles increased neuronal delivery of Cas12a in reporter mice, resulting in induced tdTomato expression after direct injection into the dentate gyrus of the hippocampus. TAxI-RNP nanoparticles also increased genome editing efficacy in hippocampal neurons versus glia. These studies demonstrate the ability to assemble RNP nanoformulations with NeutrAvidin by binding biotinylated peptides and gRNA-loaded Cas12a ribonucleases into protein nanoparticles that target CRISPR delivery to specific cell-types in vivo. The potential to deliver CRISPR nanoparticles to specific cell-types and control off-target delivery to further reduce deleterious genome editing is essential for the creation of viable therapies to treat nervous system disease.
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Affiliation(s)
- Drew L Sellers
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, United States.
| | - Kunwoo Lee
- GenEdit Inc., Berkeley, CA, United States
| | - Niren Murthy
- Department of Bioengineering, University of California, Berkeley, CA, United States
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, United States.
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9
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Abstract
Despite remarkable advances over the past several decades, many therapeutic nanomaterials fail to overcome major in vivo delivery barriers. Controlling immunogenicity, optimizing biodistribution, and engineering environmental responsiveness are key outstanding delivery problems for most nanotherapeutics. However, notable exceptions exist including some lipid and polymeric nanoparticles, some virus-based nanoparticles, and nanoparticle vaccines where immunogenicity is desired. Self-assembling protein nanoparticles offer a powerful blend of modularity and precise designability to the field, and have the potential to solve many of the major barriers to delivery. In this review, we provide a brief overview of key designable features of protein nanoparticles and their implications for therapeutic delivery applications. We anticipate that protein nanoparticles will rapidly grow in their prevalence and impact as clinically relevant delivery platforms.
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Affiliation(s)
- Audrey Olshefsky
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
- Institute
for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Christian Richardson
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
- Institute
for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H. Pun
- Department
of Bioengineering, University of Washington, Seattle, Washington 98195, United States
- Molecular
Engineering and Sciences Institute, University
of Washington, Seattle, Washington 98195, United States
| | - Neil P. King
- Institute
for Protein Design, University of Washington, Seattle, Washington 98195, United States
- Department
of Biochemistry, University of Washington, Seattle, Washington 98195, United States
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10
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Abstract
In both biomedical research and clinical cell therapy manufacturing, there is a need for cell isolation systems that recover purified cells in the absence of any selection agent. Reported traceless cell isolation methods using engineered antigen-binding fragments or aptamers have been limited to processing a single cell type at a time. There remains an unmet need for cell isolation processes that rapidly sort multiple target cell types. Here, we utilized two aptamers along with their designated complementary strands (reversal agents) to tracelessly isolate two cell types from a mixed cell population with one aptamer-labeling step and two sequential cell elution steps with reversal agents. We engineered a CD71-binding aptamer (rvCD71apt) and a reversal agent pair to be used simultaneously with our previously reported traceless purification approach using the CD8 aptamer (rvCD8apt) and its reversal agent. We verified the compatibility of the two aptamer displacement mechanisms by flow cytometry and the feasibility of incorporating rvCD71apt with a magnetic solid state. We then combined rvCD71apt with rvCD8apt to isolate activated CD4+ T cells and resting CD8+ cells by eluting these target cells into separate fractions with orthogonal strand displacements. This is the first demonstration of isolating different cell types using two aptamers and reversal agents at the same time. Potentially, different or more aptamers can be included in this traceless multiplexed isolation system for diverse applications with a shortened operation time and a lower production cost.
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Affiliation(s)
- Emmeline L Cheng
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Nataly Kacherovsky
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
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11
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Yang LF, Kacherovsky N, Liang J, Salipante SJ, Pun SH. SCORe: SARS-CoV-2 Omicron Variant RBD-Binding DNA Aptamer for Multiplexed Rapid Detection and Pseudovirus Neutralization. Anal Chem 2022; 94:12683-12690. [PMID: 35972202 PMCID: PMC9397568 DOI: 10.1021/acs.analchem.2c01993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/03/2022] [Indexed: 01/18/2023]
Abstract
During the COVID-19 (coronavirus disease 2019) pandemic, several SARS-CoV-2 variants of concern emerged, including the Omicron variant, which has enhanced infectivity and immune invasion. Many antibodies and aptamers that bind the spike (S) of previous strains of SARS-CoV-2 either do not bind or bind with low affinity to Omicron S. In this study, we report a high-affinity SARS-CoV-2 Omicron RBD-binding aptamer (SCORe) that binds Omicron BA.1 and BA.2 RBD with nanomolar KD1. We employ aptamers SCORe.50 and SNAP4.74 in a multiplexed lateral flow assay (LFA) to distinguish between Omicron and wild-type S at concentrations as low as 100 pM. Finally, we show that SCORe.50 and its dimerized form SCOReD can neutralize Omicron S-pseudotyped virus infection of ACE2-overexpressing cells by >70%. SCORe therefore has potential applications in COVID-19 rapid diagnostics as well as in viral neutralization.
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Affiliation(s)
- Lucy F. Yang
- Department of Bioengineering, University of Washington, Seattle, WA 98195
| | - Nataly Kacherovsky
- Department of Bioengineering, University of Washington, Seattle, WA 98195
| | - Joey Liang
- Department of Bioengineering, University of Washington, Seattle, WA 98195
| | | | - Suzie H. Pun
- Department of Bioengineering, University of Washington, Seattle, WA 98195
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12
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Cheng EL, Cardle II, Kacherovsky N, Bansia H, Wang T, Zhou Y, Raman J, Yen A, Gutierrez D, Salipante SJ, des Georges A, Jensen MC, Pun SH. Discovery of a Transferrin Receptor 1-Binding Aptamer and Its Application in Cancer Cell Depletion for Adoptive T-Cell Therapy Manufacturing. J Am Chem Soc 2022; 144:13851-13864. [PMID: 35875870 PMCID: PMC10024945 DOI: 10.1021/jacs.2c05349] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The clinical manufacturing of chimeric antigen receptor (CAR) T cells includes cell selection, activation, gene transduction, and expansion. While the method of T-cell selection varies across companies, current methods do not actively eliminate the cancer cells in the patient's apheresis product from the healthy immune cells. Alarmingly, it has been found that transduction of a single leukemic B cell with the CAR gene can confer resistance to CAR T-cell therapy and lead to treatment failure. In this study, we report the identification of a novel high-affinity DNA aptamer, termed tJBA8.1, that binds transferrin receptor 1 (TfR1), a receptor broadly upregulated by cancer cells. Using competition assays, high resolution cryo-EM, and de novo model building of the aptamer into the resulting electron density, we reveal that tJBA8.1 shares a binding site on TfR1 with holo-transferrin, the natural ligand of TfR1. We use tJBA8.1 to effectively deplete B lymphoma cells spiked into peripheral blood mononuclear cells with minimal impact on the healthy immune cell composition. Lastly, we present opportunities for affinity improvement of tJBA8.1. As TfR1 expression is broadly upregulated in many cancers, including difficult-to-treat T-cell leukemias and lymphomas, our work provides a facile, universal, and inexpensive approach for comprehensively removing cancerous cells from patient apheresis products for safe manufacturing of adoptive T-cell therapies.
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Affiliation(s)
- Emmeline L Cheng
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Ian I Cardle
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States.,Seattle Children's Therapeutics, Seattle, Washington 98101, United States
| | - Nataly Kacherovsky
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Harsh Bansia
- Structural Biology Initiative, CUNY Advanced Science Research Center, City University of New York, New York, New York 10031, United States
| | - Tong Wang
- Nanoscience Initiative, CUNY Advanced Science Research Center, City University of New York, New York, New York 10031, United States
| | - Yunshi Zhou
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Jai Raman
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Albert Yen
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Dominique Gutierrez
- Structural Biology Initiative, CUNY Advanced Science Research Center, City University of New York, New York, New York 10031, United States.,Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York (CUNY), New York, New York 10016, United States
| | - Stephen J Salipante
- Department of Laboratory Medicine, University of Washington, Seattle, Washington 98195-7110, United States
| | - Amédée des Georges
- Structural Biology Initiative, CUNY Advanced Science Research Center, City University of New York, New York, New York 10031, United States.,Ph.D. Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, United States.,Department of Chemistry and Biochemistry, City College of New York, New York, New York 10031, United States
| | - Michael C Jensen
- Seattle Children's Therapeutics, Seattle, Washington 98101, United States.,Program in Immunology, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, United States
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
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13
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Prossnitz AN, Pun SH. Correction to "Modulating Boronic Ester Stability in Block Copolymer Micelles via the Neighbor Effect of Copolymerized Tertiary Amines for Controlled Release of Polyphenolic Drugs". ACS Macro Lett 2022; 11:772. [PMID: 35653689 DOI: 10.1021/acsmacrolett.2c00305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Yang LF, Kacherovsky N, Panpradist N, Wan R, Liang J, Zhang B, Salipante SJ, Lutz BR, Pun SH. Aptamer Sandwich Lateral Flow Assay (AptaFlow) for Antibody-Free SARS-CoV-2 Detection. Anal Chem 2022; 94:7278-7285. [PMID: 35532905 PMCID: PMC9112978 DOI: 10.1021/acs.analchem.2c00554] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/10/2022] [Indexed: 12/17/2022]
Abstract
The COVID-19 pandemic is among the greatest health and socioeconomic crises in recent history. Although COVID-19 vaccines are being distributed, there remains a need for rapid testing to limit viral spread from infected individuals. We previously identified the SARS-CoV-2 spike protein N-terminal domain (NTD) binding DNA aptamer 1 (SNAP1) for detection of SARS-CoV-2 virus by aptamer-antibody sandwich enzyme-linked immunoassay (ELISA) and lateral flow assay (LFA). In this work, we identify a new aptamer that also binds at the NTD, named SARS-CoV-2 spike protein NTD-binding DNA aptamer 4 (SNAP4). SNAP4 binds with high affinity (<30 nM) for the SARS-CoV-2 spike protein, a 2-fold improvement over SNAP1. Furthermore, we utilized both SNAP1 and SNAP4 in an aptamer sandwich LFA (AptaFlow), which detected SARS-CoV-2 UV-inactivated virus at concentrations as low as 106 copies/mL. AptaFlow costs <$1 per test to produce, provides results in <1 h, and detects SARS-CoV-2 at concentrations that indicate higher viral loads and a high probability of contagious transmission. AptaFlow is a potential approach for a low-cost, convenient antigen test to aid the control of the COVID-19 pandemic.
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Affiliation(s)
- Lucy F. Yang
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195
| | - Nataly Kacherovsky
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195
| | - Nuttada Panpradist
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195
| | - Ruixuan Wan
- Department of Chemistry, University of Washington, Seattle, Washington 98195
| | - Joey Liang
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195
| | - Bo Zhang
- Department of Chemistry, University of Washington, Seattle, Washington 98195
| | - Stephen J. Salipante
- Department of Laboratory Medicine, University of Washington, Seattle, Washington 98195
| | - Barry R. Lutz
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195
| | - Suzie H. Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195
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15
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Lv S, Song K, Yen A, Peeler DJ, Nguyen DC, Olshefsky A, Sylvestre M, Srinivasan S, Stayton PS, Pun SH. Well-Defined Mannosylated Polymer for Peptide Vaccine Delivery with Enhanced Antitumor Immunity. Adv Healthc Mater 2022; 11:e2101651. [PMID: 34706166 PMCID: PMC9043035 DOI: 10.1002/adhm.202101651] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/19/2021] [Indexed: 12/28/2022]
Abstract
Peptide-based cancer vaccines offer production and safety advantages but have had limited clinical success due to their intrinsic instability, rapid clearance, and low cellular uptake. Nanoparticle-based delivery vehicles can improve the in vivo stability and cellular uptake of peptide antigens. Here, a well-defined, self-assembling mannosylated polymer is developed for anticancer peptide antigen delivery. The amphiphilic polymer is prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization, and the peptide antigens are conjugated to the pH-sensitive hydrophobic block through the reversible disulfide linkage for selective release after cell entry. The polymer-peptide conjugates self-assemble into sub-100 nm micelles at physiological pH and dissociate at endosomal pH. The mannosylated micellar corona increases the accumulation of vaccine cargoes in the draining inguinal lymph nodes and facilitates nanoparticle uptake by professional antigen presenting cells. In vivo studies demonstrate that the mannosylated micelle formulation improves dendritic cell activation and enhances antigen-specific T cell responses, resulting in higher antitumor immunity in tumor-bearing mice compared to free peptide antigen. The mannosylated polymer is therefore a simple and promising platform for the delivery of peptide cancer vaccines.
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Affiliation(s)
- Shixian Lv
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Kefan Song
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Albert Yen
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - David J Peeler
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Dinh Chuong Nguyen
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Audrey Olshefsky
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Meilyn Sylvestre
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Selvi Srinivasan
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Patrick S Stayton
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
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16
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Baldassi D, Ambike S, Feuerherd M, Cheng CC, Peeler DJ, Feldmann DP, Porras-Gonzalez DL, Wei X, Keller LA, Kneidinger N, Stoleriu MG, Popp A, Burgstaller G, Pun SH, Michler T, Merkel OM. Inhibition of SARS-CoV-2 replication in the lung with siRNA/VIPER polyplexes. J Control Release 2022; 345:661-674. [PMID: 35364120 PMCID: PMC8963978 DOI: 10.1016/j.jconrel.2022.03.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/24/2022] [Accepted: 03/27/2022] [Indexed: 01/11/2023]
Abstract
SARS-CoV-2 has been the cause of a global pandemic since 2019 and remains a medical urgency. siRNA-based therapies are a promising strategy to fight viral infections. By targeting a specific region of the viral genome, siRNAs can efficiently downregulate viral replication and suppress viral infection. However, to achieve the desired therapeutic activity, siRNA requires a suitable delivery system. The VIPER (virus-inspired polymer for endosomal release) block copolymer has been reported as promising delivery system for both plasmid DNA and siRNA in the past years. It is composed of a hydrophilic block for condensation of nucleic acids as well as a hydrophobic, pH-sensitive block that, at acidic pH, exposes the membrane lytic peptide melittin, which enhances endosomal escape. In this study, we aimed at developing a formulation for pulmonary administration of siRNA to suppress SARS-CoV-2 replication in lung epithelial cells. After characterizing siRNA/VIPER polyplexes, the activity and safety profile were confirmed in a lung epithelial cell line. To further investigate the activity of the polyplexes in a more sophisticated cell culture system, an air-liquid interface (ALI) culture was established. siRNA/VIPER polyplexes reached the cell monolayer and penetrated through the mucus layer secreted by the cells. Additionally, the activity against wild-type SARS-CoV-2 in the ALI model was confirmed by qRT-PCR. To investigate translatability of our findings, the activity against SARS-CoV-2 was tested ex vivo in human lung explants. Here, siRNA/VIPER polyplexes efficiently inhibited SARS-CoV-2 replication. Finally, we verified the delivery of siRNA/VIPER polyplexes to lung epithelial cells in vivo, which represent the main cellular target of viral infection in the lung. In conclusion, siRNA/VIPER polyplexes efficiently delivered siRNA to lung epithelial cells and mediated robust downregulation of viral replication both in vitro and ex vivo without toxic or immunogenic side effects in vivo, demonstrating the potential of local siRNA delivery as a promising antiviral therapy in the lung.
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Affiliation(s)
- Domizia Baldassi
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-University of Munich, Butenandtstraße 5, 81377 Munich, Germany
| | - Shubhankar Ambike
- Institute of Virology, School of Medicine, Technical University of Munich / Helmholtz Zentrum Munich, Trogerstr.30, 81675 Munich, Germany
| | - Martin Feuerherd
- Institute of Virology, School of Medicine, Technical University of Munich / Helmholtz Zentrum Munich, Trogerstr.30, 81675 Munich, Germany
| | - Cho-Chin Cheng
- Institute of Virology, School of Medicine, Technical University of Munich / Helmholtz Zentrum Munich, Trogerstr.30, 81675 Munich, Germany
| | - David J Peeler
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, United States
| | - Daniel P Feldmann
- Department of Oncology, Wayne State University School of Medicine, 4100 John R St, Detroit, MI 48201, United States
| | - Diana Leidy Porras-Gonzalez
- Institute of Lung Health and Immunity (LHI) and Comprehensive Pneumology Center (CPC) with the CPC-M bioArchive, Helmholtz Munich, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Xin Wei
- Institute of Lung Health and Immunity (LHI) and Comprehensive Pneumology Center (CPC) with the CPC-M bioArchive, Helmholtz Munich, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Lea-Adriana Keller
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-University of Munich, Butenandtstraße 5, 81377 Munich, Germany; Preclinical Safety, AbbVie Deutschland GmbH & Co. KG, Knollstrasse, 67061 Ludwigshafen, Germany
| | - Nikolaus Kneidinger
- Department of Medicine V, University Hospital, LMU, Munich, Member of the German Center for Lung Research (DZL), Germany
| | - Mircea Gabriel Stoleriu
- Center for Thoracic Surgery Munich, Ludwig-Maximilians-University of Munich (LMU) and Asklepios Pulmonary Hospital; Marchioninistraße 15, 81377 Munich and Robert-Koch-Allee 2, 82131 Gauting, Germany
| | - Andreas Popp
- Preclinical Safety, AbbVie Deutschland GmbH & Co. KG, Knollstrasse, 67061 Ludwigshafen, Germany
| | - Gerald Burgstaller
- Institute of Lung Health and Immunity (LHI) and Comprehensive Pneumology Center (CPC) with the CPC-M bioArchive, Helmholtz Munich, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, United States
| | - Thomas Michler
- Institute of Virology, School of Medicine, Technical University of Munich / Helmholtz Zentrum Munich, Trogerstr.30, 81675 Munich, Germany; Institute of Laboratory Medicine, University Hospital, LMU, Munich, Germany
| | - Olivia M Merkel
- Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, Ludwig-Maximilians-University of Munich, Butenandtstraße 5, 81377 Munich, Germany; Institute of Lung Health and Immunity (LHI) and Comprehensive Pneumology Center (CPC) with the CPC-M bioArchive, Helmholtz Munich, Member of the German Center for Lung Research (DZL), Munich, Germany.
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17
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Abstract
Despite the rising global incidence of central nervous system (CNS) disorders, CNS drug development remains challenging, with high costs, long pathways to clinical use and high failure rates. The CNS is highly protected by physiological barriers, in particular, the blood-brain barrier and the blood-cerebrospinal fluid barrier, which limit access of most drugs. Biomaterials can be designed to bypass or traverse these barriers, enabling the controlled delivery of drugs into the CNS. In this Review, we first examine the effects of normal and diseased CNS physiology on drug delivery to the brain and spinal cord. We then discuss CNS drug delivery designs and materials that are administered systemically, directly to the CNS, intranasally or peripherally through intramuscular injections. Finally, we highlight important challenges and opportunities for materials design for drug delivery to the CNS and the anticipated clinical impact of CNS drug delivery.
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Affiliation(s)
- Elizabeth Nance
- Department of Chemical Engineering, University of Washington, Seattle, WA, USA
- These authors contributed equally: Elizabeth Nance, Suzie H. Pun, Rajiv Saigal, Drew L. Sellers
| | - Suzie H. Pun
- Department of Bioengineering, University of Washington, Seattle, WA, USA
- These authors contributed equally: Elizabeth Nance, Suzie H. Pun, Rajiv Saigal, Drew L. Sellers
| | - Rajiv Saigal
- Department of Bioengineering, University of Washington, Seattle, WA, USA
- Department of Neurological Surgery, University of Washington, Seattle, WA, USA
- These authors contributed equally: Elizabeth Nance, Suzie H. Pun, Rajiv Saigal, Drew L. Sellers
| | - Drew L. Sellers
- Department of Bioengineering, University of Washington, Seattle, WA, USA
- These authors contributed equally: Elizabeth Nance, Suzie H. Pun, Rajiv Saigal, Drew L. Sellers
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18
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Prossnitz AN, Pun SH. Modulating Boronic Ester Stability in Block Copolymer Micelles via the Neighbor Effect of Copolymerized Tertiary Amines for Controlled Release of Polyphenolic Drugs. ACS Macro Lett 2022; 11:276-283. [PMID: 35575376 DOI: 10.1021/acsmacrolett.1c00751] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The traceless and pH-sensitive properties of boronic esters are attractive for the synthesis of polymer-drug conjugates, but current platforms suffer from both low stability under physiologically relevant conditions and synthetically demanding optimization to tune drug release profiles. We hypothesized that the high catechol affinity and stability of Wulff-type boronic acids could be mimicked by copolymerization of phenyl boronic acid with a tertiary amine and subsequent micellization. This strategy yielded a versatile platform for the preparation of reversible polymer-drug conjugates, which more than doubled the oxidative stability of encapsulated polyphenolic drug cargo at physiologically relevant pH and enabled simple and incremental tuning of drug release kinetics. Moreover, we validated, with 19F NMR, that these copolymers exhibit uniquely high catechol affinity that could not be replicated by combinations of similarly functionalized small molecules. Overall, this report demonstrates that copolymerization of boronic acid and tertiary amine monomers is a powerful and modular approach to improving boronic ester chemistry for drug delivery applications.
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Affiliation(s)
- Alexander N. Prossnitz
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H. Pun
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
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19
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Abstract
In recent decades, peptides, which can possess high potency, excellent selectivity, and low toxicity, have emerged as promising therapeutics for cancer applications. Combined with an improved understanding of tumor biology and immuno-oncology, peptides have demonstrated robust antitumor efficacy in preclinical tumor models. However, the translation of peptides with intracellular targets into clinical therapies has been severely hindered by limitations in their intrinsic structure, such as low systemic stability, rapid clearance, and poor membrane permeability, that impede intracellular delivery. In this Review, we summarize recent advances in polymer-mediated intracellular delivery of peptides for cancer therapy, including both therapeutic peptides and peptide antigens. We highlight strategies to engineer polymeric materials to increase peptide delivery efficiency, especially cytosolic delivery, which plays a crucial role in potentiating peptide-based therapies. Finally, we discuss future opportunities for peptides in cancer treatment, with an emphasis on the design of polymer nanocarriers for optimized peptide delivery.
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Affiliation(s)
| | | | - Alexander N Prossnitz
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
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20
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Kacherovsky N, Yang LF, Dang HV, Cheng EL, Cardle II, Walls AC, McCallum M, Sellers DL, DiMaio F, Salipante SJ, Corti D, Veesler D, Pun SH. Discovery and Characterization of Spike N‐Terminal Domain‐Binding Aptamers for Rapid SARS‐CoV‐2 Detection. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107730] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nataly Kacherovsky
- Department of Bioengineering University of Washington Seattle WA 98105 USA
| | - Lucy F. Yang
- Department of Bioengineering University of Washington Seattle WA 98105 USA
| | - Ha V. Dang
- Department of Biochemistry University of Washington Seattle WA 98105 USA
| | - Emmeline L. Cheng
- Department of Bioengineering University of Washington Seattle WA 98105 USA
| | - Ian I. Cardle
- Department of Bioengineering University of Washington Seattle WA 98105 USA
| | - Alexandra C. Walls
- Department of Biochemistry University of Washington Seattle WA 98105 USA
| | - Matthew McCallum
- Department of Biochemistry University of Washington Seattle WA 98105 USA
| | - Drew L. Sellers
- Department of Bioengineering University of Washington Seattle WA 98105 USA
| | - Frank DiMaio
- Department of Biochemistry University of Washington Seattle WA 98105 USA
| | | | - Davide Corti
- Humabs BioMed SA, a subsidiary of Vir Biotechnology 6500 Bellinzona Switzerland
| | - David Veesler
- Department of Biochemistry University of Washington Seattle WA 98105 USA
| | - Suzie H. Pun
- Department of Bioengineering University of Washington Seattle WA 98105 USA
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21
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Kacherovsky N, Yang LF, Dang HV, Cheng EL, Cardle II, Walls AC, McCallum M, Sellers DL, DiMaio F, Salipante SJ, Corti D, Veesler D, Pun SH. Discovery and Characterization of Spike N-Terminal Domain-Binding Aptamers for Rapid SARS-CoV-2 Detection. Angew Chem Int Ed Engl 2021; 60:21211-21215. [PMID: 34328683 PMCID: PMC8426805 DOI: 10.1002/anie.202107730] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Indexed: 12/13/2022]
Abstract
The coronavirus disease 2019 (COVID‐19) pandemic has devastated families and disrupted healthcare, economies and societies across the globe. Molecular recognition agents that are specific for distinct viral proteins are critical components for rapid diagnostics and targeted therapeutics. In this work, we demonstrate the selection of novel DNA aptamers that bind to the SARS‐CoV‐2 spike glycoprotein with high specificity and affinity (<80 nM). Through binding assays and high resolution cryo‐EM, we demonstrate that SNAP1 (SARS‐CoV‐2 spike protein N‐terminal domain‐binding aptamer 1) binds to the S N‐terminal domain. We applied SNAP1 in lateral flow assays (LFAs) and ELISAs to detect UV‐inactivated SARS‐CoV‐2 at concentrations as low as 5×105 copies mL−1. SNAP1 is therefore a promising molecular tool for SARS‐CoV‐2 diagnostics.
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Affiliation(s)
- Nataly Kacherovsky
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - Lucy F Yang
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - Ha V Dang
- Department of Biochemistry, University of Washington, Seattle, WA, 98105, USA
| | - Emmeline L Cheng
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - Ian I Cardle
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - Alexandra C Walls
- Department of Biochemistry, University of Washington, Seattle, WA, 98105, USA
| | - Matthew McCallum
- Department of Biochemistry, University of Washington, Seattle, WA, 98105, USA
| | - Drew L Sellers
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
| | - Frank DiMaio
- Department of Biochemistry, University of Washington, Seattle, WA, 98105, USA
| | - Stephen J Salipante
- Department of Laboratory Medicine, University of Washington, Seattle, WA, 98105, USA
| | - Davide Corti
- Humabs BioMed SA, a subsidiary of, Vir Biotechnology, 6500, Bellinzona, Switzerland
| | - David Veesler
- Department of Biochemistry, University of Washington, Seattle, WA, 98105, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, WA, 98105, USA
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22
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Lv S, Sylvestre M, Song K, Pun SH. Development of D-melittin polymeric nanoparticles for anti-cancer treatment. Biomaterials 2021; 277:121076. [PMID: 34461456 DOI: 10.1016/j.biomaterials.2021.121076] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 08/09/2021] [Accepted: 08/16/2021] [Indexed: 12/15/2022]
Abstract
Melittin, the primary peptide component of bee venom, is a potent cytolytic anti-cancer peptide with established anti-tumor activity. However, practical application of melittin in oncology is hampered by its strong, nonspecific hemolytic activity and intrinsic instability. To address these shortcomings, delivery systems are used to overcome the drawbacks of melittin and facilitate its safe delivery. Yet, a recent study revealed that encapsulated melittin remains immunogenic and can act as an adjuvant to elicit a fatal antibody immune response against the delivery carrier. We discovered that substitution of l-amino acids with d-amino acids mitigates this problem: D-melittin nanoformulations induce significantly decreased immune response, resulting in excellent safety without compromising cytolytic potential. We now report the first application of D-melittin and its micellar formulations for cancer treatment. D-melittin was delivered by a pH-sensitive polymer carrier that (i) forms micellar nanoparticles at normal physiological conditions, encapsulating melittin, and (ii) dissociates at endosomal pH, restoring melittin activity. D-melittin micelles (DMM) exhibits significant cytotoxicity and induces hemolysis in a pH-dependent manner. In addition, DMM induce immunogenic cell death, revealing its potential for cancer immunotherapy. Indeed, in vivo studies demonstrated the superior safety profile of DMM over free peptide and improved efficacy at prohibiting tumor growth. Overall, we present the first application of micellar D-melittin for cancer therapy. These findings establish a new strategy for safe, systemic delivery of melittin, unlocking a potential pathway toward clinical translation for cytotoxic peptides as anti-cancer agents. which can revolutionize in vivo delivery of therapeutic peptides and peptide antigens.
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Affiliation(s)
- Shixian Lv
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, United States.
| | - Meilyn Sylvestre
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, United States.
| | - Kefan Song
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, United States.
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, United States.
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23
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Lee DC, Guye KN, Paranji RK, Lachowski K, Pozzo LD, Ginger DS, Pun SH. Dual-Stimuli Responsive Single-Chain Polymer Folding via Intrachain Complexation of Tetramethoxyazobenzene and β-Cyclodextrin. Langmuir 2021; 37:10126-10134. [PMID: 34369796 DOI: 10.1021/acs.langmuir.1c01442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We synthesize and characterize a triblock polymer with asymmetric tetramethoxyazobenzene (TMAB) and β-cyclodextrin functionalization, taking advantage of the well-characterized azobenzene derivative-cyclodextrin inclusion complex to promote photoresponsive, self-contained folding of the polymer in an aqueous system. We use 1H NMR to show the reversibility of (E)-to-(Z) and (Z)-to-(E) TMAB photoisomerization, and evaluate the thermal stability of (Z)-TMAB and the comparatively rapid acid-catalyzed thermal (Z)-to-(E) isomerization. Important for its potential use as a functional material, we show the photoisomerization cyclability of the polymeric TMAB chromophore and calculate isomerization quantum yields by extinction spectroscopy. To verify self-inclusion of the polymeric TMAB and cyclodextrin, we use two-dimensional 1H NOESY NMR data to show proximity of TMAB and cyclodextrin in the (E)-state only; however, (Z)-TMAB is not locally correlated with cyclodextrin. Finally, the observed decrease in photoisomerization quantum yield for the dual-functionalized polymer compared to the isolated chromophore in an aqueous solution confirms TMAB and β-cyclodextrin not only are in proximity to one another, but also form the inclusion complex.
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Affiliation(s)
- Daniel C Lee
- Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington 98195, United States
| | - Kathryn N Guye
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Rajan K Paranji
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Kacper Lachowski
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Lilo D Pozzo
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - David S Ginger
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H Pun
- Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington 98195, United States
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
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24
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Peeler DJ, Yen A, Luera N, Stayton PS, Pun SH. Lytic Polyplex Vaccines Enhance Antigen‐Specific Cytotoxic T Cell Response through Induction of Local Cell Death. Advanced Therapeutics 2021. [DOI: 10.1002/adtp.202100005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- David J. Peeler
- Department of Bioengineering University of Washington Seattle WA 98195 USA
| | - Albert Yen
- Department of Bioengineering University of Washington Seattle WA 98195 USA
| | - Nicholas Luera
- Department of Bioengineering University of Washington Seattle WA 98195 USA
| | - Patrick S. Stayton
- Department of Bioengineering University of Washington Seattle WA 98195 USA
| | - Suzie H. Pun
- Department of Bioengineering University of Washington Seattle WA 98195 USA
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26
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Cardle II, Jensen MC, Pun SH, Sellers DL. Optimized serum stability and specificity of an αvβ6 integrin-binding peptide for tumor targeting. J Biol Chem 2021; 296:100657. [PMID: 33857478 PMCID: PMC8138772 DOI: 10.1016/j.jbc.2021.100657] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/06/2021] [Accepted: 04/09/2021] [Indexed: 12/03/2022] Open
Abstract
The integrin αvβ6 is an antigen expressed at low levels in healthy tissue but upregulated during tumorigenesis, which makes it a promising target for cancer imaging and therapy. A20FMDV2 is a 20-mer peptide derived from the foot-and-mouth disease virus that exhibits nanomolar and selective affinity for αvβ6 versus other integrins. Despite this selectivity, A20FMDV2 has had limited success in imaging and treating αvβ6+ tumors in vivo because of its poor serum stability. Here, we explore the cyclization and modification of the A20FMDV2 peptide to improve its serum stability without sacrificing its affinity and specificity for αvβ6. Using cysteine amino acid substitutions and cyclization by perfluoroarylation with decafluorobiphenyl, we synthesized six cyclized A20FMDV2 variants and discovered that two retained binding to αvβ6 with modestly improved serum stability. Further d-amino acid substitutions and C-terminal sequence optimization outside the cyclized region greatly prolonged peptide serum stability without reducing binding affinity. While the cyclized A20FMDV2 variants exhibited increased nonspecific integrin binding compared with the original peptide, additional modifications with the non-natural amino acids citrulline, hydroxyproline, and d-alanine were found to restore binding specificity, with some modifications leading to greater αvβ6 integrin selectivity than the original A20FMDV2 peptide. The peptide modifications detailed herein greatly improve the potential of utilizing A20FMDV2 to target αvβ6 in vivo, expanding opportunities for cancer targeting and therapy.
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Affiliation(s)
- Ian I Cardle
- Department of Bioengineering, University of Washington, Seattle, Washington, USA; Seattle Children's Therapeutics, Seattle, Washington, USA
| | - Michael C Jensen
- Department of Bioengineering, University of Washington, Seattle, Washington, USA; Seattle Children's Therapeutics, Seattle, Washington, USA; Department of Pediatrics, University of Washington, Seattle, Washington, USA; Program in Immunology, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Drew L Sellers
- Department of Bioengineering, University of Washington, Seattle, Washington, USA.
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Lamm RJ, Pichon TJ, Huyan F, Wang X, Prossnitz AN, Manner KT, White NJ, Pun SH. Optimizing the Polymer Chemistry and Synthesis Method of PolySTAT, an Injectable Hemostat. ACS Biomater Sci Eng 2020; 6:7011-7020. [PMID: 33320636 DOI: 10.1021/acsbiomaterials.0c01189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There is a lack of prehospital hemostatic agents, especially for noncompressible hemorrhage. We previously reported PolySTAT, a unimeric, injectable hemostatic agent, that physically cross-links fibrin to strengthen clots. In this work, we sought to improve the water-solubility and synthesis yield of PolySTAT to increase the likelihood of clinical translation, reduce cost, and facilitate future mass production. First, we focused on side-chain engineering of the carrier polymer backbone to improve water-solubility. We found that substitution of the 2-hydroxyethyl methacrylate (HEMA) monomer with glycerol monomethacrylate (GmMA) significantly improved the water-solubility of PolySTAT without compromising efficacy. Both materials increased clot firmness and decreased lysis as measured by rotational thromboelastometry (ROTEM). Additionally, we confirmed the in vivo activity of GmMA-based PolySTAT by improving rat survival in a femoral artery bleed model. Second, to reduce waste, we evaluated PolySTAT synthesis via direct polymerization of peptide monomers. Methacrylamide and methacrylate peptide-monomers were synthesized and polymerized via reversible addition-fragmentation chain transfer (RAFT) polymerization. This approach markedly improved the yield of PolySTAT synthesis while maintaining its biological activity in ROTEM. This work demonstrates the flexibility of PolySTAT to a variety of comonomers and synthetic routes and establishes direct RAFT polymerization of peptide monomers as a potential route of mass production.
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Affiliation(s)
- Robert J Lamm
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15th Avenue NE, Box 355061, Seattle, Washington 98195, United States
| | - Trey J Pichon
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15th Avenue NE, Box 355061, Seattle, Washington 98195, United States
| | - Frederick Huyan
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15th Avenue NE, Box 355061, Seattle, Washington 98195, United States
| | - Xu Wang
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, Washington 98195, United States
| | - Alexander N Prossnitz
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15th Avenue NE, Box 355061, Seattle, Washington 98195, United States
| | - Karl T Manner
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15th Avenue NE, Box 355061, Seattle, Washington 98195, United States
| | - Nathan J White
- Department of Emergency Medicine, University of Washington School of Medicine, Seattle, Washington 98195, United States
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, 3720 15th Avenue NE, Box 355061, Seattle, Washington 98195, United States
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28
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Abstract
Chimeric antigen receptor (CAR) T-cell therapy has transformed the cancer treatment landscape, utilizing ex vivo modified autologous T cells to treat relapsed or refractory B-cell leukemias and lymphomas. However, the therapy's broader impact has been limited, in part, by a complicated, lengthy, and expensive production process. Accordingly, as CAR T-cell therapies are further advanced to treat other cancers, continual innovation in cell manufacturing will be critical to their successful clinical implementation. In this Account, we describe our research efforts using biomaterials to improve the three fundamental steps in CAR T-cell manufacturing: (1) isolation, (2) activation, and (3) genetic modification.Recognizing that clinical T-cell isolation reagents have high cost and supply constraints, we developed a synthetic DNA aptamer and complementary reversal agent technology that isolates label-free CD8+ T cells with high purity and yield from peripheral blood mononuclear cells. Encouragingly, CAR T cells manufactured from both antibody- and aptamer-isolated T cells were comparable in therapeutic potency. Discovery and design of other T-cell specific aptamers and corresponding reversal reagents could fully realize the potential of this approach, enabling inexpensive isolation of multiple distinct T-cell populations in a single isolation step.Current ex vivo T-cell activation materials do not accurately mimic in situ T-cell activation by antigen presenting cells (APCs). They cause unequal CD4+ and CD8+ T-cell expansion, necessitating separate production of CD4+ and CD8+ CAR T cells for therapies that call for balanced infusion compositions. To address these shortcomings, we designed a panel of biodegradable cell-templated silica microparticles with supported lipid bilayers that display stimulatory ligands for T-cell activation. High membrane fluidity, elongated shape, and rough surface topography, all properties of endogenous APCs, were found to be favorable parameters for activation, promoting unbiased and efficient CD4/CD8 T-cell expansion while not terminally differentiating the cells.Viral and electroporation-based gene delivery systems have various drawbacks. Viral vectors are expensive and have limited cargo sizes, whereas electroporation is highly cytotoxic. Thus, low-cost nonviral platforms that transfect T cells with low cytotoxicity and high efficiency are needed for CAR gene delivery. Our group thus synthesized a panel of cationic polymers with different architectures and evaluated their T-cell transfection ability. We identified a comb-shaped polymer formulation that transfected primary T cells with low cytotoxicity, although transfection efficiency was low compared to conventional methods. Analysis of intracellular and extracellular barriers to transfection revealed low uptake of polyplexes and high endosomal pH in T cells, alluding to biological and polymer properties that could be further improved.These innovations represent just a few recent developments in the biomaterials field for addressing CAR T-cell production needs. Together, these technologies and their future advancement will pave the way for economical and straightforward CAR T-cell manufacturing.
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Affiliation(s)
- Ian I. Cardle
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
- Research and Development, Seattle Children’s Therapeutics, Seattle, Washington 98101, United States
| | - Emmeline L. Cheng
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
| | - Michael C. Jensen
- Research and Development, Seattle Children’s Therapeutics, Seattle, Washington 98101, United States
- Department of Pediatrics and Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
- Program in Immunology, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, United States
| | - Suzie H. Pun
- Department of Bioengineering, University of Washington, Seattle, Washington 98195-5061, United States
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Lee DC, Sellers DL, Liu F, Boydston AJ, Pun SH. Synthesis and Characterization of Anionic Poly(cyclopentadienylene vinylene) and Its Use in Conductive Hydrogels. Angew Chem Int Ed Engl 2020; 59:13430-13436. [PMID: 32378290 PMCID: PMC7485123 DOI: 10.1002/anie.202004098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Indexed: 11/08/2022]
Abstract
The use of π-conjugated polymers (CPs) in conductive hydrogels remains challenging due to the water-insoluble nature of most CPs. Conjugated polyelectrolytes (CPEs) are promising alternatives because they have tunable electronic properties and high water-solubility, but they are often difficult to synthesize and thus have not been widely adopted. Herein, we report the synthesis of an anionic poly(cyclopentadienylene vinylene) (aPCPV) from an insulating precursor under mild conditions and in high yield. Functionalized aPCPV is a highly water-soluble CPE that exhibits low cytotoxicity, and we found that doping hydrogels with aPCPV imparts conductivity. We also anticipate that this synthetic strategy, due to its ease and high efficiency, will be widely used to create families of not-yet-explored π-conjugated vinylene polymers.
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Affiliation(s)
- Daniel C Lee
- Molecular Engineering and Sciences Institute, University of Washington, 3946 W Stevens Way NE, Seattle, WA, 98105, USA
| | - Drew L Sellers
- Department of Bioengineering, University of Washington, 3720 15th Avenue NE, Seattle, WA, 98195, USA
| | - Fan Liu
- Department of Bioengineering, University of Washington, 3720 15th Avenue NE, Seattle, WA, 98195, USA
| | - Andrew J Boydston
- Department of Chemistry, Department of Materials Science and Engineering, Department of Chemical and Biological Engineering, University of Wisconsin, Madison, WI, 53706, USA
| | - Suzie H Pun
- Molecular Engineering and Sciences Institute, University of Washington, 3946 W Stevens Way NE, Seattle, WA, 98105, USA
- Department of Bioengineering, University of Washington, 3720 15th Avenue NE, Seattle, WA, 98195, USA
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30
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Lee DC, Sellers DL, Liu F, Boydston AJ, Pun SH. Synthesis and Characterization of Anionic Poly(cyclopentadienylene vinylene) and Its Use in Conductive Hydrogels. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daniel C. Lee
- Molecular Engineering and Sciences Institute University of Washington 3946 W Stevens Way NE Seattle WA 98105 USA
| | - Drew L. Sellers
- Department of Bioengineering University of Washington 3720 15th Avenue NE Seattle WA 98195 USA
| | - Fan Liu
- Department of Bioengineering University of Washington 3720 15th Avenue NE Seattle WA 98195 USA
| | - Andrew J. Boydston
- Department of Chemistry Department of Materials Science and Engineering Department of Chemical and Biological Engineering University of Wisconsin Madison WI 53706 USA
| | - Suzie H. Pun
- Molecular Engineering and Sciences Institute University of Washington 3946 W Stevens Way NE Seattle WA 98105 USA
- Department of Bioengineering University of Washington 3720 15th Avenue NE Seattle WA 98195 USA
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31
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Liu GW, Pippin JW, Eng DG, Lv S, Shankland SJ, Pun SH. Nanoparticles exhibit greater accumulation in kidney glomeruli during experimental glomerular kidney disease. Physiol Rep 2020; 8:e14545. [PMID: 32786069 PMCID: PMC7422806 DOI: 10.14814/phy2.14545] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 12/26/2022] Open
Abstract
Loss and dysfunction of glomerular podocytes result in increased macromolecule permeability through the glomerular filtration barrier and nephrotic syndrome. Current therapies can induce and maintain disease remission, but cause serious and chronic complications. Nanoparticle drug carriers could mitigate these side effects by delivering drugs to the kidneys more efficiently than free drug through tailoring of carrier properties. An important extrinsic factor of nanoparticle biodistribution is local pathophysiology, which may drive greater nanoparticle deposition in certain tissues. Here, we hypothesized that a "leakier" filtration barrier during glomerular kidney disease would increase nanoparticle distribution into the kidneys. We examined the effect of nanoparticle size and disease state on kidney accumulation in male BALB/c mice. The effect of size was tested using a panel of fluorescent polystyrene nanoparticles of size 20-200 nm, due to the relevance of this size range for drug delivery applications.Experimental focal segmental glomerulosclerosis was induced using an anti-podocyte antibody that causes abrupt podocyte depletion. Nanoparticles were modified with carboxymethyl-terminated poly(ethylene glycol) for stability and biocompatibility. After intravenous injection, fluorescence from nanoparticles of size 20 and 100 nm, but not 200 nm, was observed in kidney glomeruli and peritubular capillaries. During conditions of experimental focal segmental glomerulosclerosis, the number of fluorescent nanoparticle punctae in kidney glomeruli increased by 1.9-fold for 20 and 100 nm nanoparticles compared to normal conditions. These findings underscore the importance of understanding and leveraging kidney pathophysiology in engineering new, targeted drug carriers that accumulate more in diseased glomeruli to treat glomerular kidney disease.
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Affiliation(s)
- Gary W. Liu
- Department of Bioengineering and Molecular Engineering & Sciences InstituteUniversity of WashingtonSeattleWAUSA
| | - Jeffrey W. Pippin
- Department of MedicineDivision of NephrologyUniversity of Washington School of MedicineSeattleWAUSA
| | - Diana G. Eng
- Department of MedicineDivision of NephrologyUniversity of Washington School of MedicineSeattleWAUSA
| | - Shixian Lv
- Department of Bioengineering and Molecular Engineering & Sciences InstituteUniversity of WashingtonSeattleWAUSA
| | - Stuart J. Shankland
- Department of Bioengineering and Molecular Engineering & Sciences InstituteUniversity of WashingtonSeattleWAUSA
| | - Suzie H. Pun
- Department of Bioengineering and Molecular Engineering & Sciences InstituteUniversity of WashingtonSeattleWAUSA
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32
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Liu SX, Gustafson HH, Jackson DL, Pun SH, Trapnell C. Trajectory analysis quantifies transcriptional plasticity during macrophage polarization. Sci Rep 2020; 10:12273. [PMID: 32703960 PMCID: PMC7378057 DOI: 10.1038/s41598-020-68766-w] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/04/2020] [Indexed: 11/30/2022] Open
Abstract
In recent years, macrophages have been shown to be tremendously plastic in both in vitro and in vivo settings; however, it remains unclear whether macrophages retain any persistent memory of past polarization states which may then impact their future repolarization to new states. Here, we perform deep transcriptomic profiling at high temporal resolution as macrophages are polarized with cytokines that drive them into "M1" and "M2" molecular states. We find through trajectory analysis of their global transcriptomic profiles that macrophages which are first polarized to M1 or M2 and then subsequently repolarized demonstrate little to no memory of their polarization history. We observe complete repolarization both from M1 to M2 and vice versa, and we find that macrophage transcriptional phenotypes are defined by the current cell microenvironment, rather than an amalgamation of past and present states.
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Affiliation(s)
- Serena X Liu
- Department of Genome Sciences, University of Washington, Seattle, WA, 98195, USA
| | - Heather H Gustafson
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA, 98101, USA
| | - Dana L Jackson
- Department of Genome Sciences, University of Washington, Seattle, WA, 98195, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA
| | - Cole Trapnell
- Department of Genome Sciences, University of Washington, Seattle, WA, 98195, USA.
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33
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Sylvestre M, Saxby CP, Kacherovsky N, Gustafson H, Salipante SJ, Pun SH. Identification of a DNA Aptamer That Binds to Human Monocytes and Macrophages. Bioconjug Chem 2020; 31:1899-1907. [PMID: 32589412 DOI: 10.1021/acs.bioconjchem.0c00247] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
As cancer strategies shift toward immunotherapy, the need for new binding ligands to target and isolate specific immune cell populations has soared. Based on prior work identifying a peptide specific for murine M2-like macrophages, we sought to identify an aptamer that could bind human M2-like macrophages. Tumor-associated macrophages (TAMs) adopt an M2-like phenotype and support tumor progression and dissemination. Here, we employed cell-SELEX to identify an aptamer ligand that targets this cell population over tissue resident (M0-like) or tumoricidal (M1-like) macrophages. Instead, we identified an aptamer that binds both human M0- and M2-like macrophages and monocytes, with highest binding affinity to M2-like macrophage (Kd ∼ 20 nM) and monocytes (Kd ∼ 45 nM) and minimal binding to other leukocytes. The aptamer binds to CD14+ but not CD16+ monocytes, and is rapidly internalized by these cells. We also demonstrate that this aptamer is able to bind human monocytes when both are administered in vivo to mice. Thus, binding to these cell populations (monocytes, M0-like and M2-like macrophages), this aptamer lends itself toward monocyte-specific applications, such as monocyte-targeted drug delivery or column selection.
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Affiliation(s)
- Meilyn Sylvestre
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Christopher P Saxby
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Nataly Kacherovsky
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Heather Gustafson
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
| | - Stephen J Salipante
- Laboratory Medicine, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
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34
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Lee J, Zhao T, Peeler DJ, Lee DC, Pichon TJ, Li D, Weigandt KM, Horner PJ, Pozzo LD, Sellers DL, Pun SH. Formulation of thrombin-inhibiting hydrogels via self-assembly of ionic peptides with peptide-modified polymers. Soft Matter 2020; 16:3762-3768. [PMID: 32239011 PMCID: PMC7204513 DOI: 10.1039/d0sm00209g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cell therapy for spinal cord injuries offers the possibility of replacing lost cells after trauma to the central nervous system (CNS). In preclinical studies, synthetic hydrogels are often co-delivered to the injury site to support survival and integration of the transplanted cells. These hydrogels ideally mimic the mechanical and biochemical features of a healthy CNS extracellular matrix while also providing the possibility of localized drug delivery to promote healing. In this work, we synthesize peptide-functionalized polymers that contain both a peptide sequence for incorporation into self-assembled peptide hydrogels along with bioactive peptides that inhibit scar formation. We demonstrate that peptide hydrogels formulated with the peptide-functionalized polymers possess similar mechanical properties (soft and shear-thinning) as peptide-only hydrogels. Small angle neutron scattering analysis reveals that polymer-containing hydrogels possess larger inhomogeneous domains but small-scale features such as mesh size remain the same as peptide-only hydrogels. We further confirm that the integrated hydrogels containing bioactive peptides exhibit thrombin inhibition activity, which has previously shown to reduce scar formation in vivo. Finally, while the survival of encapsulated cells was poor, cells cultured on the hydrogels exhibited good viability. Overall, the described composite hydrogels formed from self-assembling peptides and peptide-modified polymers are promising, user-friendly materials for CNS applications in regeneration.
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Affiliation(s)
- Jason Lee
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
| | - Tianyu Zhao
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
| | - David J Peeler
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
| | - Daniel C Lee
- Molecular Engineering and Sciences, University of Washington, Seattle, WA 98195, USA
| | - Trey J Pichon
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
| | - David Li
- Department of Chemical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Kathleen M Weigandt
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Philip J Horner
- Center for Neuroregeneration and Department of Neurosurgery, Houston Methodist Research Institute, Houston, TX 77030, USA
| | - Lilo D Pozzo
- Department of Chemical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Drew L Sellers
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA. and Molecular Engineering and Sciences, University of Washington, Seattle, WA 98195, USA
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35
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Sylvestre M, Crane CA, Pun SH. Progress on Modulating Tumor-Associated Macrophages with Biomaterials. Adv Mater 2020; 32:e1902007. [PMID: 31559665 PMCID: PMC7098849 DOI: 10.1002/adma.201902007] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 07/25/2019] [Indexed: 05/14/2023]
Abstract
Tumor-associated macrophages (TAMs) are a complex and heterogeneous population of cells within the tumor microenvironment. In many tumor types, TAMs contribute toward tumor malignancy and are therefore a therapeutic target of interest. Here, three major strategies for regulating TAMs are highlighted, emphasizing the role of biomaterials in these approaches. First, systemic methods for targeting tumor-associated macrophage are summarized and limitations to both passive and active targeting approaches considered. Second, lessons learned from the significant literature on wound healing and macrophage response to implanted biomaterials are discussed with the vision of applying these principles to localized, biomaterial-based modulation of tumor-associated macrophage. Finally, the developing field of engineered macrophages, including genetic engineering and integration with biomaterials or drug delivery systems, is examined. Analysis of major challenges in the field along with exciting opportunities for the future of macrophage-based therapies in oncology are included.
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Affiliation(s)
- Meilyn Sylvestre
- Department of Bioengineering, University of Washington, 3720 15th Ave. NE, Seattle, WA, 98195, USA
| | - Courtney A Crane
- Department of Neurological Surgery, University of Washington School of Medicine, Seattle Children's Research Institute, Ben Towne Center for Childhood Research, Seattle, WA, 98101, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, 3720 15th Ave. NE, Seattle, WA, 98195, USA
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36
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Peeler DJ, Luera N, Horner PJ, Pun SH, Sellers DL. Polyplex transfection from intracerebroventricular delivery is not significantly affected by traumatic brain injury. J Control Release 2020; 322:149-156. [PMID: 32198024 DOI: 10.1016/j.jconrel.2020.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/09/2020] [Accepted: 03/16/2020] [Indexed: 10/24/2022]
Abstract
Traumatic brain injury (TBI) is largely non-preventable and often kills or permanently disables its victims. Because current treatments for TBI merely ameliorate secondary effects of the initial injury like swelling and hemorrhaging, strategies for the induction of neuronal regeneration are desperately needed. Recent discoveries regarding the TBI-responsive migratory behavior and differentiation potential of neural progenitor cells (NPCs) found in the subventricular zone (SVZ) have prompted strategies targeting gene therapies to these cells to enhance neurogenesis after TBI. We have previously shown that plasmid polyplexes can non-virally transfect SVZ NPCs when directly injected in the lateral ventricles of uninjured mice. We describe the first reported intracerebroventricular transfections mediated by polymeric gene carriers in a murine TBI model and investigate the anatomical parameters that dictate transfection through this route of administration. Using both luciferase and GFP plasmid transfections, we show that the time delay between injury and polyplex injection directly impacts the magnitude of transfection efficiency, but that overall trends in the location of transfection are not affected by injury. Confocal microscopy of quantum dot-labeled plasmid uptake in vivo reveals association between our polymers and negatively charged NG2 chondroitin sulfate proteoglycans of the SVZ extracellular matrix. We further validate that glycosaminoglycans but not sulfate groups are required for polyplex uptake and transfection in vitro. These studies demonstrate that non-viral gene delivery is impacted by proteoglycan interactions and suggest the need for improved polyplex targeting materials that penetrate brain extracellular matrix to increase transfection efficiency in vivo.
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Affiliation(s)
- David J Peeler
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, United States
| | - Nicholas Luera
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, United States
| | - Philip J Horner
- Center for Neuroregeneration and Department of Neurosurgery, Houston Methodist Research Institute, Houston, TX, United States
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, United States.
| | - Drew L Sellers
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, United States.
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37
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Sellers DL, Tan JKY, Pineda JMB, Peeler DJ, Porubsky VL, Olden BR, Salipante SJ, Pun SH. Targeting Ligands Deliver Model Drug Cargo into the Central Nervous System along Autonomic Neurons. ACS Nano 2019; 13:10961-10971. [PMID: 31589023 PMCID: PMC7651855 DOI: 10.1021/acsnano.9b01515] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
While biologic drugs such as proteins, peptides, or nucleic acids have shown promise in the treatment of neurodegenerative diseases, the blood-brain barrier (BBB) severely limits drug delivery to the central nervous system (CNS) after systemic administration. Consequently, drug delivery challenges preclude biological drug candidates from the clinical armamentarium. In order to target drug delivery and uptake into to the CNS, we used an in vivo phage display screen to identify peptides able to target drug-uptake by the vast array of neurons of the autonomic nervous system (ANS). Using next-generation sequencing, we identified 21 candidate targeted ANS-to-CNS uptake ligands (TACL) that enriched bacteriophage accumulation and delivered protein-cargo into the CNS after intraperitoneal (IP) administration. The series of TACL peptides were synthesized and tested for their ability to deliver a model enzyme (NeutrAvidin-horseradish peroxidase fusion) to the brain and spinal cord. Three TACL-peptides facilitated significant active enzyme delivery into the CNS, with limited accumulation in off-target organs. Peptide structure and serum stability is increased when internal cysteine residues are cyclized by perfluoroarylation with decafluorobiphenyl, which increased delivery to the CNS further. TACL-peptide was demonstrated to localize in parasympathetic ganglia neurons in addition to neuronal structures in the hindbrain and spinal cord. By targeting uptake into ANS neurons, we demonstrate the potential for TACL-peptides to bypass the blood-brain barrier and deliver a model drug into the brain and spinal cord.
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Affiliation(s)
- Drew L. Sellers
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington, 98195, USA
| | - James-Kevin Y. Tan
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
| | - Julio Marco B. Pineda
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
| | - David J. Peeler
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
| | - Veronica L. Porubsky
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
| | - Brynn R. Olden
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
| | - Stephen J. Salipante
- Department of Laboratory Medicine, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H. Pun
- Department of Bioengineering, University of Washington, Seattle, Washington, 98195, USA
- Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington, 98195, USA
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Liu GW, Johnson SL, Jain R, Peeler DJ, Shankland SJ, Pun SH. Optimized nonviral gene delivery for primary urinary renal progenitor cells to enhance cell migration. J Biomed Mater Res A 2019; 107:2718-2725. [PMID: 31404486 DOI: 10.1002/jbm.a.36775] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 07/31/2019] [Accepted: 08/07/2019] [Indexed: 02/06/2023]
Abstract
Progressive loss of glomerular podocytes during kidney disease leads to irreversible kidney failure, and is exacerbated by the fact that podocytes are terminally differentiated epithelial cells and unable to proliferate. Regeneration of lost podocytes must therefore derive from nonpodocyte sources. Human urine-derived renal progenitor cells (uRPCs) are attractive podocyte progenitors for cell therapy applications due to their availability from patient urine and ability to migrate to injured glomeruli and differentiate into de novo podocytes after intravenous administration. Because gene delivery has emerged as an important strategy to augment the functionality and survival of cell therapies prior to injection, in this work we optimized nonviral gene delivery conditions (cell density, DNA dose, % FBS, and transfection material composition) to primary uRPCs. Using the cationic polymer-peptide conjugate VIPER for gene delivery and the Sleeping Beauty transposon/transposase constructs for gene integration, we optimized transfection parameters to achieve efficient transgene expression (up to 55% transfected cells) and stable transgene expression (>65% integration efficiency) lasting up to 10 days. With these methods, we transfected uRPCs to overexpress CXCR4, an important chemokine receptor that mediates uRPC migration to the kidneys after intravenous injection, and demonstrate that CXCR4-uRPCs exhibit enhanced migration compared to mock-transfected cells.
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Affiliation(s)
- Gary W Liu
- Department of Bioengineering and Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington
| | - Soren L Johnson
- Department of Bioengineering and Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington
| | - Ritika Jain
- Department of Bioengineering and Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington
| | - David J Peeler
- Department of Bioengineering and Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington
| | - Stuart J Shankland
- Department of Medicine, Division of Nephrology, University of Washington School of Medicine, Seattle, Washington
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering & Sciences Institute, University of Washington, Seattle, Washington
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39
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Peng J, Zuo C, Xiao Q, Deng K, Meng C, Liu Y, Zhang M, Ma L, Pun SH, Wei H. Synthesis of stimuli-responsive nanosized ring-like colloids and cyclic polymers via a dual-template approach. Chem Sci 2019; 10:3943-3948. [PMID: 31049188 PMCID: PMC6471857 DOI: 10.1039/c9sc00450e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 03/04/2019] [Indexed: 01/10/2023] Open
Abstract
Ring-like particles have received considerable attention due to their unique interior cavity and properties. However, the preparation of stimuli-responsive nanosized rings with internal size smaller than 100 nm remains unexplored likely due to the challenges encountered in their synthesis. The successful fulfillment of this target will not only significantly enrich the family of ring-like nanoparticles but also build a connection that bridges ring-like nanoparticles and cyclic polymers. For this purpose, we report in this study a controlled synthesis of stimuli-responsive ring-like colloids and cyclic polymers using both star-shaped polymers and β-cyclodextrin (β-CD) as the dual templates. The first template comprising star-shaped polymers generated a ring-like structure and adoption of β-CD as the second template further restricted the ring thickness to the height of a β-CD, leading to the generation of stimuli-responsive nanosized ring-like colloids with ring thickness less than 1 nm, which shifted the ring-like structure to cyclic polymers with reversible cross-linked disulfide bridges. The reported "dual-template" approach is thus a valuable alternative to the current synthetic strategies toward stimuli-responsive ring-like colloids and cyclic polymers.
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Affiliation(s)
- Jinlei Peng
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Cai Zuo
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Qi Xiao
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Kaicheng Deng
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Chao Meng
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Yuping Liu
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Miao Zhang
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Liwei Ma
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
| | - Suzie H Pun
- Department of Bioengineering , Molecular Engineering and Sciences Institute , University of Washington , Seattle , Washington 98195 , USA
| | - Hua Wei
- State Key Laboratory of Applied Organic Chemistry , Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China .
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40
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Lee DC, Lamm RJ, Prossnitz AN, Boydston AJ, Pun SH. Dual Polymerizations: Untapped Potential for Biomaterials. Adv Healthc Mater 2019; 8:e1800861. [PMID: 30369103 PMCID: PMC6426662 DOI: 10.1002/adhm.201800861] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 09/05/2018] [Indexed: 12/11/2022]
Abstract
Block copolymers with unique architectures and those that can self-assemble into supramolecular structures are used in medicine as biomaterial scaffolds and delivery vehicles for cells, therapeutics, and imaging agents. To date, much of the work relies on controlling polymer behavior by varying the monomer side chains to add functionality and tune hydrophobicity. Although varying the side chains is an efficient strategy to control polymer behavior, changing the polymer backbone can also be a powerful approach to modulate polymer self-assembly, rigidity, reactivity, and biodegradability for biomedical applications. There are many developments in the syntheses of polymers with segmented backbones, but these developments are not widely adopted as strategies to address the unique constraints and requirements of polymers for biomedical applications. This review highlights dual polymerization strategies for the synthesis of backbone-segmented block copolymers to facilitate their adoption for biomedical applications.
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Affiliation(s)
- Daniel C. Lee
- Molecular Engineering and Sciences Institute, University of Washington
| | | | | | - Andrew J. Boydston
- Molecular Engineering and Sciences Institute, University of Washington
- Department of Chemistry, University of Washington
| | - Suzie H. Pun
- Molecular Engineering and Sciences Institute, University of Washington
- Department of Bioengineering, University of Washington
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41
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Abstract
T cells have emerged as a therapeutically-relevant target for ex vivo gene delivery and editing. However, most commercially available reagents cannot transfect T cells and designing cationic polymers for non-viral gene delivery to T cells has resulted in moderate success. Here, we assess various barriers to successful gene transfer in the Jurkat human T cell line and primary human T cells. Using two polymers previously developed by our group, we show that uptake is one barrier to gene delivery in primary human T cells but is not predictive of successful gene delivery. We then probe intracellular pathways for barriers to gene transfer including endosomal acidification, autophagy, and immune sensing pathways. We find that endosomal acidification is slower and not as robust in human T cells compared to the model HeLa human cell line commonly used to evaluate cationic polymers for gene delivery. These studies inform the future design of cationic polymers for non-viral gene delivery to T cells, specifically, to rely on alternative endosomal release mechanisms rather than on pH-triggered release.
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Affiliation(s)
- Brynn R Olden
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, USA.
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42
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Olden BR, Perez CR, Wilson AL, Cardle II, Lin YS, Kaehr B, Gustafson JA, Jensen MC, Pun SH. Cell-Templated Silica Microparticles with Supported Lipid Bilayers as Artificial Antigen-Presenting Cells for T Cell Activation. Adv Healthc Mater 2019; 8:e1801188. [PMID: 30549244 PMCID: PMC6394850 DOI: 10.1002/adhm.201801188] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/28/2018] [Indexed: 01/18/2023]
Abstract
Biomaterial properties that modulate T cell activation, growth, and differentiation are of significant interest in the field of cellular immunotherapy manufacturing. In this work, a new platform technology that allows for the modulation of various activation particle design parameters important for polyclonal T cell activation is presented. Artificial antigen presenting cells (aAPCs) are successfully created using supported lipid bilayers on various cell-templated silica microparticles with defined membrane fluidity and stimulating antibody density. This panel of aAPCs is used to probe the importance of activation particle shape, size, membrane fluidity, and stimulation antibody density on T cell outgrowth and differentiation. All aAPC formulations are able to stimulate T cell growth, and preferentially promote CD8+ T cell growth over CD4+ T cell growth when compared to commercially available pendant antibody-conjugated particles. T cells cultured with HeLa- and red blood cell-templated aAPCs have a less-differentiated and less-exhausted phenotype than those cultured with spherical aAPCs with matched membrane coatings when cultured for 14 days. These results support continued exploration of silica-supported lipid bilayers as an aAPC platform.
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Affiliation(s)
- Brynn R. Olden
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA,
| | - Caleb R. Perez
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA,
| | - Ashley L. Wilson
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Research Institute, Seattle, WA 98101, USA
| | - Ian I. Cardle
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA,
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Research Institute, Seattle, WA 98101, USA
| | - Yu-Shen Lin
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA,
| | - Bryan Kaehr
- Advanced Materials Laboratory, Sandia National Laboratories, Albuquerque, NM 87185, USA
| | - Joshua A. Gustafson
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Research Institute, Seattle, WA 98101, USA
| | - Michael C. Jensen
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Research Institute, Seattle, WA 98101, USA
| | - Suzie H. Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA,
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43
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Cheng Y, Liu GW, Jain R, Pippin JW, Shankland SJ, Pun SH. Boronic acid copolymers for direct loading and acid-triggered release of Bis-T-23 in cultured podocytes. ACS Biomater Sci Eng 2018; 4:3968-3973. [PMID: 31259236 PMCID: PMC6599616 DOI: 10.1021/acsbiomaterials.8b01163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report an acid-reversible linker for triggered release of Bis-T-23, an experimental small molecule drug for kidney disease treatment that restores podocyte morphology during disease. Bis-T-23 contains catechols, which form an acid-reversible, covalent boronate ester bond with boronic acids. We synthesized phenylboronic acid-containing polymers using reversible addition-fragmentation chain transfer polymerization that were able to directly load and solubilize Bis-T-23. Because of the reversibility of the boronic ester bond, drug was released in its native form in a pH-dependent manner. The polymers rapidly trafficked into acidic compartments and did not exhibit cytotoxicity, and polymer-drug conjugates successfully delivered Bis-T-23 into cultured podocytes.
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Affiliation(s)
- Yilong Cheng
- Present address, Department of Applied Chemistry, School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an, Shaanxi 710049, China
- Department of Bioengineering and Molecular Engineering & Sciences Institute University of Washington, 3720 15th Ave NE Seattle, WA 98195, USA
| | - Gary W. Liu
- Department of Bioengineering and Molecular Engineering & Sciences Institute University of Washington, 3720 15th Ave NE Seattle, WA 98195, USA
| | - Ritika Jain
- Department of Bioengineering and Molecular Engineering & Sciences Institute University of Washington, 3720 15th Ave NE Seattle, WA 98195, USA
| | - Jeffrey W. Pippin
- Department of Medicine, Division of Nephrology, School of Medicine, University of Washington, 750 Republican Street, E-179, Seattle, WA 98109, USA
| | - Stuart J. Shankland
- Department of Medicine, Division of Nephrology, School of Medicine, University of Washington, 750 Republican Street, E-179, Seattle, WA 98109, USA
| | - Suzie H. Pun
- Department of Bioengineering and Molecular Engineering & Sciences Institute University of Washington, 3720 15th Ave NE Seattle, WA 98195, USA
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44
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Abstract
The nonviral delivery of exogenous nucleic acids (NA) into cells for therapeutic purposes has rapidly matured into tangible clinical impact. Synthetic polymers are particularly attractive vectors for NA delivery due to their relatively inexpensive production compared to viral alternatives and their highly tailorable chemical properties; indeed, many preclinical investigations have revealed the primary biological barriers to nonviral NA delivery by systematically varying polymeric material properties. This review focuses on applications of pH-sensitive chemistries that enable polymeric vectors to serially address multiple biological barriers to NA delivery. In particular, we focus on recent innovations with in vivo evaluation that dynamically enable colloidal stability, cellular uptake, endosomal escape, and nucleic acid release. We conclude with a summary of successes to date and projected areas for impactful future research.
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Affiliation(s)
- David J Peeler
- Department of Bioengineering and Molecular Engineering and Sciences Institute , University of Washington , Seattle , Washington 98195 , United States
| | - Drew L Sellers
- Department of Bioengineering and Molecular Engineering and Sciences Institute , University of Washington , Seattle , Washington 98195 , United States
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute , University of Washington , Seattle , Washington 98195 , United States
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45
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Peeler DJ, Thai SN, Cheng Y, Horner PJ, Sellers DL, Pun SH. pH-sensitive polymer micelles provide selective and potentiated lytic capacity to venom peptides for effective intracellular delivery. Biomaterials 2018; 192:235-244. [PMID: 30458359 DOI: 10.1016/j.biomaterials.2018.11.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 10/31/2018] [Accepted: 11/03/2018] [Indexed: 01/12/2023]
Abstract
Endocytosed biomacromolecule delivery systems must escape the endosomal trafficking pathway in order for their cargo to exert effects in other cellular compartments. Although endosomal release is well-recognized as one of the greatest barriers to efficacy of biologic drugs with intracellular targets, most drug carriers have relied on cationic materials that passively induce endosomal swelling and membrane rupture with low efficiency. To address the endosome release challenge, our lab has developed a diblock copolymer system for nucleic acid delivery that selectively displays a potent membrane-lytic peptide (melittin) in response to the pH drop during the endosomal maturation. To further optimize this system, we evaluated a panel of peptides with reported lytic activity in comparison to melittin. Nineteen different lytic peptides were synthesized and their membrane-lytic properties at both neutral and acidic pH characterized using a red blood cell hemolysis assay. The top five performing peptides were then conjugated to our pH-sensitive diblock copolymer via disulfide linkers and used to deliver a variety of nucleic acids to cultured mammalian cells as well as in vivo to the mouse brain. We demonstrate that the sharp pH-transition of VIPER compensates for potential advantages from pH-sensitive peptides, such that polymer-peptide conjugates with poorly selective but highly lytic peptides achieve safe and effective transfection both in vitro and in vivo. In addition, peptides that require release from polymer backbones for lysis were less effective in the VIPER system, likely due to limited endosomal reducing power of target cells. Finally, we show that certain peptides are potentiated in lytic ability by polymer conjugation and that these peptide-polymer constructs are most effective in vivo.
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Affiliation(s)
- David J Peeler
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, 98195, United States
| | - Salina N Thai
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, 98195, United States
| | - Yilong Cheng
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, 98195, United States
| | - Philip J Horner
- Center for Neuroregeneration and Department of Neurosurgery, Houston Methodist Research Institute, Houston, TX, United States
| | - Drew L Sellers
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, 98195, United States.
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, 98195, United States.
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46
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Liu GW, Prossnitz AN, Eng DG, Cheng Y, Subrahmanyam N, Pippin JW, Lamm RJ, Ngambenjawong C, Ghandehari H, Shankland SJ, Pun SH. Glomerular disease augments kidney accumulation of synthetic anionic polymers. Biomaterials 2018; 178:317-325. [DOI: 10.1016/j.biomaterials.2018.06.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/31/2018] [Accepted: 06/02/2018] [Indexed: 12/22/2022]
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47
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Olden BR, Cheng Y, Yu JL, Pun SH. Cationic polymers for non-viral gene delivery to human T cells. J Control Release 2018; 282:140-147. [PMID: 29518467 PMCID: PMC6008197 DOI: 10.1016/j.jconrel.2018.02.043] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/16/2018] [Accepted: 02/28/2018] [Indexed: 12/20/2022]
Abstract
The clinical success of chimeric antigen receptor (CAR) T cell immunotherapy in treating multiple blood cancers has created a need for efficient methods of ex vivo gene delivery to primary human T cells for cell engineering. Here, we synthesize and evaluate a panel of cationic polymers for gene delivery to both cultured and primary human T cells. We show that a subset of comb- and sunflower-shaped pHEMA-g-pDMAEMA polymers can mediate transfection with efficiencies up to 50% in the Jurkat human T cell line with minimal concomitant toxicity (>90% viability). We then optimize primary human T cell transfection conditions including activation time, cell density, DNA dose, culture media, and cytokine treatment. We demonstrate transfection of both CD4+ and CD8+ primary human T cells with messenger RNA and plasmid DNA at efficiencies up to 25 and 18%, respectively, with similarly high viability.
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Affiliation(s)
- Brynn R Olden
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA
| | - Yilong Cheng
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA
| | - Jonathan L Yu
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA
| | - Suzie H Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA 98195, USA.
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48
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Abstract
Messenger RNA (mRNA) is a biomolecule with a wide range of promising clinical applications. However, the unstable nature of mRNA and its susceptibility to degradation by ribonucleases (RNases) necessitate the use of specialized formulations for delivery. Polycations are an emerging class of synthetic carriers capable of packaging nucleic acids, and may serve as suitable RNase-resistant formulations for mRNA administration. Here, we explore the application of VIPER and sunflower polycations, two polycations previously synthesized by our group, for the delivery of mRNA in comparison to branched poly(ethylenimine); all three polycations have been shown to efficiently deliver plasmid DNA (pDNA) to cultured cells. Despite successful mRNA condensation and packaging, transfection studies reveal that these three polycations can only efficiently deliver mRNA under serum-free conditions, while pDNA delivery is achieved even in the presence of serum. RNase resistance studies confirm that nuclease degradation of mRNA cargo remains a significant barrier to mRNA delivery using these polycations. These results emphasize the need for additional strategies for nuclease protection of mRNA cargo beyond electrostatic complexation with polycation.
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Affiliation(s)
- Albert Yen
- Department of Bioengineering , University of Washington , Seattle , WA 98195 , United States
| | - Yilong Cheng
- Department of Bioengineering , University of Washington , Seattle , WA 98195 , United States.,Department of Applied Chemistry, School of Science , Xi'an Jiaotong University , Xi'an 710049 , P.R. China
| | - Meilyn Sylvestre
- Department of Bioengineering , University of Washington , Seattle , WA 98195 , United States
| | - Heather H Gustafson
- Department of Bioengineering , University of Washington , Seattle , WA 98195 , United States
| | - Sanyogitta Puri
- Advanced Drug Delivery, Pharmaceutical Sciences, IMED Biotech Unit , AstraZeneca , Cambridge CB4 OWG , U.K
| | - Suzie H Pun
- Department of Bioengineering , University of Washington , Seattle , WA 98195 , United States
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49
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Ngambenjawong C, Sylvestre M, Gustafson HH, Pineda JMB, Pun SH. Reversibly Switchable, pH-Dependent Peptide Ligand Binding via 3,5-Diiodotyrosine Substitutions. ACS Chem Biol 2018; 13:995-1002. [PMID: 29481044 DOI: 10.1021/acschembio.8b00171] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cell type-specific targeting ligands utilized in drug delivery applications typically recognize receptors that are overexpressed on the cells of interest. Nonetheless, these receptors may also be expressed, to varying extents, on off-target cells, contributing to unintended side effects. For the selectivity profile of targeting ligands in cancer therapy to be improved, stimuli-responsive masking of these ligands with acid-, redox-, or enzyme-cleavable molecules has been reported, whereby the targeting ligands are exposed in specific environments, e.g., acidic tumor hypoxia. One possible drawback of these systems lies in their one-time, permanent trigger, which enables the "demasked" ligands to bind off-target cells if released back into the systemic circulation. A promising strategy to address the aforementioned problem is to design ligands that show selective binding based on ionization state, which may be microenvironment-dependent. In this study, we report a systematic strategy to engineer low pH-selective targeting peptides using an M2 macrophage-targeting peptide (M2pep) as an example. 3,5-Diiodotyrosine mutagenesis into native tyrosine residues of M2pep confers pH-dependent binding behavior specific to acidic environment (pH 6) when the amino acid is protonated into the native tyrosine-like state. At physiological pH of 7.4, the hydroxyl group of 3,5-diiodotyrosine on the peptide is deprotonated leading to interruption of the peptide native binding property. Our engineered pH-responsive M2pep (Ac-Y-Î-Î) binds target M2 macrophages more selectively at pH 6 than at pH 7.4. In addition, 3,5-diiodotyrosine substitutions also improve serum stability of the peptide. Finally, we demonstrate pH-dependent reversibility in target binding via a postbinding peptide elution study. The strategy presented here should be applicable for engineering pH-dependent functionality of other targeting peptides with potential applications in physiology-dependent in vivo targeting applications (e.g., targeting hypoxic tumor/inflammation) or in in vitro receptor identification.
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Affiliation(s)
- Chayanon Ngambenjawong
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195, United States
| | - Meilyn Sylvestre
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195, United States
| | - Heather H. Gustafson
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195, United States
| | - Julio Marco B. Pineda
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195, United States
| | - Suzie H. Pun
- Department of Bioengineering and Molecular Engineering and Sciences Institute, University of Washington, Seattle, Washington 98195, United States
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50
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Rosenberg AB, Roco CM, Muscat RA, Kuchina A, Sample P, Yao Z, Graybuck LT, Peeler DJ, Mukherjee S, Chen W, Pun SH, Sellers DL, Tasic B, Seelig G. Single-cell profiling of the developing mouse brain and spinal cord with split-pool barcoding. Science 2018; 360:176-182. [PMID: 29545511 DOI: 10.1126/science.aam8999] [Citation(s) in RCA: 708] [Impact Index Per Article: 118.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 09/30/2017] [Accepted: 02/26/2018] [Indexed: 12/11/2022]
Abstract
To facilitate scalable profiling of single cells, we developed split-pool ligation-based transcriptome sequencing (SPLiT-seq), a single-cell RNA-seq (scRNA-seq) method that labels the cellular origin of RNA through combinatorial barcoding. SPLiT-seq is compatible with fixed cells or nuclei, allows efficient sample multiplexing, and requires no customized equipment. We used SPLiT-seq to analyze 156,049 single-nucleus transcriptomes from postnatal day 2 and 11 mouse brains and spinal cords. More than 100 cell types were identified, with gene expression patterns corresponding to cellular function, regional specificity, and stage of differentiation. Pseudotime analysis revealed transcriptional programs driving four developmental lineages, providing a snapshot of early postnatal development in the murine central nervous system. SPLiT-seq provides a path toward comprehensive single-cell transcriptomic analysis of other similarly complex multicellular systems.
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Affiliation(s)
| | - Charles M Roco
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Richard A Muscat
- Department of Electrical Engineering, University of Washington, Seattle, WA, USA
| | - Anna Kuchina
- Department of Electrical Engineering, University of Washington, Seattle, WA, USA
| | - Paul Sample
- Department of Electrical Engineering, University of Washington, Seattle, WA, USA
| | - Zizhen Yao
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | - David J Peeler
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Sumit Mukherjee
- Department of Electrical Engineering, University of Washington, Seattle, WA, USA
| | - Wei Chen
- Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, USA
| | - Suzie H Pun
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Drew L Sellers
- Department of Bioengineering, University of Washington, Seattle, WA, USA.,Institute for Stem Cell and Regenerative Medicine, Seattle, WA, USA
| | | | - Georg Seelig
- Department of Electrical Engineering, University of Washington, Seattle, WA, USA. .,Molecular Engineering and Sciences Institute, University of Washington, Seattle, WA, USA.,Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle, WA, USA
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