1
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Lee S, Carrow JK, Fraser LA, Yan J, Jeyamogan S, Sambandam Y, Clemons TD, Kolberg-Edelbrock AN, He J, Mathew J, Zhang ZJ, Leventhal JP, Gallon L, Palmer LC, Stupp SI. Single-cell coating with biomimetic extracellular nanofiber matrices. Acta Biomater 2024; 177:50-61. [PMID: 38331132 DOI: 10.1016/j.actbio.2024.02.002] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 01/17/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
Cell therapies offer great promise in the treatment of diseases and tissue regeneration, but their clinical use has many challenges including survival, optimal performance in their intended function, or localization at sites where they are needed for effective outcomes. We report here on a method to coat a biodegradable matrix of biomimetic nanofibers on single cells that could have specific functions ranging from cell signaling to targeting and helping cells survive when used for therapies. The fibers are composed of peptide amphiphile (PA) molecules that self-assemble into supramolecular nanoscale filaments. The PA nanofibers were able to create a mesh-like coating for a wide range of cell lineages with nearly 100 % efficiency, without interrupting the natural cellular phenotype or functions. The targeting abilities of this system were assessed in vitro using human primary regulatory T (hTreg) cells coated with PAs displaying a vascular cell adhesion protein 1 (VCAM-1) targeting motif. This approach provides a biocompatible method for single-cell coating that does not negatively alter cellular phenotype, binding capacity, or immunosuppressive functionality, with potential utility across a broad spectrum of cell therapies. STATEMENT OF SIGNIFICANCE: Cell therapies hold great promise in the treatment of diseases and tissue regeneration, but their clinical use has been limited by cell survival, targeting, and function. We report here a method to coat single cells with a biodegradable matrix of biomimetic nanofibers composed of peptide amphiphile (PA) molecules. The nanofibers were able to coat cells, such as human primary regulatory T cells, with nearly 100 % efficiency, without interrupting the natural cellular phenotype or functions. The approach provides a biocompatible method for single-cell coating that does not negatively alter cellular phenotype, binding capacity, or immunosuppressive functionality, with potential utility across a broad spectrum of cell therapies.
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Affiliation(s)
- Slgirim Lee
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States
| | - James K Carrow
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States
| | - Lewis A Fraser
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States
| | - Jianglong Yan
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States
| | - Shareni Jeyamogan
- Department of Surgery, Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Yuvaraj Sambandam
- Department of Surgery, Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Tristan D Clemons
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Chemistry, Northwestern University, Evanston, IL 60208, United States
| | - Alexandra N Kolberg-Edelbrock
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, United States
| | - Jie He
- Department of Surgery, Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - James Mathew
- Department of Surgery, Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States; Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Zheng Jenny Zhang
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Surgery, Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Joseph P Leventhal
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Surgery, Comprehensive Transplant Center, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Lorenzo Gallon
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Liam C Palmer
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Chemistry, Northwestern University, Evanston, IL 60208, United States.
| | - Samuel I Stupp
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, United States; Department of Chemistry, Northwestern University, Evanston, IL 60208, United States; Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, United States; Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, United States; Department of Medicine, Northwestern University, Chicago, IL 60611, United States.
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2
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Ortega JA, Sasselli IR, Boccitto M, Fleming AC, Fortuna TR, Li Y, Sato K, Clemons TD, Mckenna ED, Nguyen TP, Anderson EN, Asin J, Ichida JK, Pandey UB, Wolin SL, Stupp SI, Kiskinis E. CLIP-Seq analysis enables the design of protective ribosomal RNA bait oligonucleotides against C9ORF72 ALS/FTD poly-GR pathophysiology. Sci Adv 2023; 9:eadf7997. [PMID: 37948524 PMCID: PMC10637751 DOI: 10.1126/sciadv.adf7997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 10/11/2023] [Indexed: 11/12/2023]
Abstract
Amyotrophic lateral sclerosis and frontotemporal dementia patients with a hexanucleotide repeat expansion in C9ORF72 (C9-HRE) accumulate poly-GR and poly-PR aggregates. The pathogenicity of these arginine-rich dipeptide repeats (R-DPRs) is thought to be driven by their propensity to bind low-complexity domains of multivalent proteins. However, the ability of R-DPRs to bind native RNA and the significance of this interaction remain unclear. Here, we used computational and experimental approaches to characterize the physicochemical properties of R-DPRs and their interaction with RNA. We find that poly-GR predominantly binds ribosomal RNA (rRNA) in cells and exhibits an interaction that is predicted to be energetically stronger than that for associated ribosomal proteins. Critically, modified rRNA "bait" oligonucleotides restore poly-GR-associated ribosomal deficits and ameliorate poly-GR toxicity in patient neurons and Drosophila models. Our work strengthens the hypothesis that ribosomal function is impaired by R-DPRs, highlights a role for direct rRNA binding in mediating ribosomal dysfunction, and presents a strategy for protecting against C9-HRE pathophysiological mechanisms.
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Affiliation(s)
- Juan A. Ortega
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Pathology and Experimental Therapy, Institute of Neurosciences, University of Barcelona, Barcelona 08907, Spain
| | - Ivan R. Sasselli
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián 20014, Spain
- Centro de Fisica de Materiales (CFM), CSIC-UPV/EHU, 20018 San Sebastián, Spain
| | - Marco Boccitto
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Andrew C. Fleming
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Tyler R. Fortuna
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Yichen Li
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Kohei Sato
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Tristan D. Clemons
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Elizabeth D. Mckenna
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Thao P. Nguyen
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Eric N. Anderson
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Jesus Asin
- Department of Statistical Methods, School of Engineering, University of Zaragoza, Zaragoza 50018, Spain
| | - Justin K. Ichida
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Udai B. Pandey
- Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Sandra L. Wolin
- RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA
| | - Samuel I. Stupp
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Evangelos Kiskinis
- The Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Neuroscience, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA
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3
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Abernathy HG, Saha J, Kemp LK, Wadhwani P, Clemons TD, Morgan SE, Rangachari V. De novo amyloid peptides with subtle sequence variations differ in their self-assembly and nanomechanical properties. Soft Matter 2023; 19:5150-5159. [PMID: 37386911 DOI: 10.1039/d3sm00604b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
Proteinaceous amyloids are well known for their widespread pathological roles but lately have emerged also as key components in several biological functions. The remarkable ability of amyloid fibers to form tightly packed conformations in a cross β-sheet arrangement manifests in their robust enzymatic and structural stabilities. These characteristics of amyloids make them attractive for designing proteinaceous biomaterials for various biomedical and pharmaceutical applications. In order to design customizable and tunable amyloid nanomaterials, it is imperative to understand the sensitivity of the peptide sequence for subtle changes based on amino acid position and chemistry. Here we report our results from four rationally-designed amyloidogenic decapeptides that subtly differ in hydrophobicity and polarity at positions 5 and 6. We show that making the two positions hydrophobic renders the peptide with enhanced aggregation and material properties while introducing polar residues in position 5 dramatically changes the structure and nanomechanical properties of the fibrils formed. A charged residue at position 6, however, abrogates amyloid formation. In sum, we show that subtle changes in the sequence do not make the peptide innocuous but rather sensitive to aggregation, reflected in the biophysical and nanomechanical properties of the fibrils. We conclude that tolerance of peptide amyloid for changes in the sequence, however small they may be, should not be neglected for the effective design of customizable amyloid nanomaterials.
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Affiliation(s)
- Hannah G Abernathy
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Jhinuk Saha
- Department of Chemistry and Biochemistry, School of Mathematics and Natural Sciences, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Lisa K Kemp
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Parvesh Wadhwani
- Department of Molecular Biophysics (IBG 2), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Karlsruhe, Germany
| | - Tristan D Clemons
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Sarah E Morgan
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Vijayaraghavan Rangachari
- Department of Chemistry and Biochemistry, School of Mathematics and Natural Sciences, University of Southern Mississippi, Hattiesburg, MS, USA.
- Center for Molecular and Cellular Biosciences, University of Southern Mississippi, Hattiesburg, MS, USA
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Qiu R, Chen F, Álvarez Z, Clemons TD, Biswas S, Karver MR, Takata N, Sai H, Peng H, Weigand S, Palmer LC, Stupp SI. Supramolecular Nanofibers Block SARS-CoV-2 Entry into Human Host Cells. ACS Appl Mater Interfaces 2023; 15:26340-26348. [PMID: 37235485 DOI: 10.1021/acsami.3c02447] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection relies on its spike protein binding to angiotensin-converting enzyme 2 (ACE2) on host cells to initiate cellular entry. Blocking the interactions between the spike protein and ACE2 offers promising therapeutic opportunities to prevent infection. We report here on peptide amphiphile supramolecular nanofibers that display a sequence from ACE2 in order to promote interactions with the SARS-CoV-2 spike receptor binding domain. We demonstrate that displaying this sequence on the surface of supramolecular assemblies preserves its α-helical conformation and blocks the entry of a pseudovirus and its two variants into human host cells. We also found that the chemical stability of the bioactive structures was enhanced in the supramolecular environment relative to the unassembled peptide molecules. These findings reveal unique advantages of supramolecular peptide therapies to prevent viral infections and more broadly for other targets as well.
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Affiliation(s)
- Ruomeng Qiu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Feng Chen
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Zaida Álvarez
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
- Department of Medicine, Northwestern University, 676 N. St. Clair Street, Chicago, Illinois 60611, United States
| | - Tristan D Clemons
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Suvendu Biswas
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Mark R Karver
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Nozomu Takata
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Hiroaki Sai
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, United States
| | - Han Peng
- Department of Dermatology, Northwestern University, 303 E. Superior Street, Chicago, Illinois 60611, United States
| | - Steven Weigand
- DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) Synchrotron Research Center, Advanced Photon Source (APS)/Argonne National Laboratory 432-A004, Northwestern University, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Liam C Palmer
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Samuel I Stupp
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, United States
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department of Medicine, Northwestern University, 676 N. St. Clair Street, Chicago, Illinois 60611, United States
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5
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Li C, Xiong Q, Clemons TD, Sai H, Yang Y, Hussain Sangji M, Iscen A, Palmer LC, Schatz GC, Stupp SI. Role of supramolecular polymers in photo-actuation of spiropyran hydrogels. Chem Sci 2023; 14:6095-6104. [PMID: 37293659 PMCID: PMC10246702 DOI: 10.1039/d3sc00401e] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 05/14/2023] [Indexed: 06/10/2023] Open
Abstract
Supramolecular-covalent hybrid polymers have been shown to be interesting systems to generate robotic functions in soft materials in response to external stimuli. In recent work supramolecular components were found to enhance the speed of reversible bending deformations and locomotion when exposed to light. The role of morphology in the supramolecular phases integrated into these hybrid materials remains unclear. We report here on supramolecular-covalent hybrid materials that incorporate either high-aspect-ratio peptide amphiphile (PA) ribbons and fibers, or low-aspect-ratio spherical peptide amphiphile micelles into photo-active spiropyran polymeric matrices. We found that the high-aspect-ratio morphologies not only play a significant role in providing mechanical reinforcement to the matrix but also enhance photo-actuation for both light driven volumetric contraction and expansion of spiropyran hydrogels. Molecular dynamics simulations indicate that water within the high-aspect-ratio supramolecular polymers exhibits a faster draining rate as compared to those in spherical micelles, which suggests that the high-aspect-ratio supramolecular polymers effectively facilitate the transport of trapped water molecules by functioning as channels and therefore enhancing actuation of the hybrid system. Our simulations provide a useful strategy for the design of new functional hybrid architectures and materials with the aim of accelerating response and enhancing actuation by facilitating water diffusion at the nanoscopic level.
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Affiliation(s)
- Chuang Li
- Department of Polymer Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 China
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Qinsi Xiong
- Department of Chemistry, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Tristan D Clemons
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Chemistry, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Hiroaki Sai
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Materials Science and Engineering, Northwestern University 2220 Campus Drive Evanston IL 60208 USA
| | - Yang Yang
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - M Hussain Sangji
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Biomedical Engineering, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Aysenur Iscen
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Chemical and Biological Engineering, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Liam C Palmer
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Chemistry, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Simpson Querrey Institute, Northwestern University 303 E. Superior Street Chicago IL 60611 USA
| | - George C Schatz
- Department of Chemical and Biological Engineering, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Chemistry, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Samuel I Stupp
- Center for Bio-inspired Energy Science, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Chemistry, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Materials Science and Engineering, Northwestern University 2220 Campus Drive Evanston IL 60208 USA
- Department of Biomedical Engineering, Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Medicine, Northwestern University 676 N St. Clair Chicago IL 60611 USA
- Simpson Querrey Institute, Northwestern University 303 E. Superior Street Chicago IL 60611 USA
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Fortenberry AW, Jankoski PE, Stacy EK, McCormick CL, Smith AE, Clemons TD. A Perspective on the History and Current Opportunities of Aqueous RAFT Polymerization. Macromol Rapid Commun 2022; 43:e2200414. [PMID: 35822936 PMCID: PMC10697073 DOI: 10.1002/marc.202200414] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/15/2022] [Indexed: 02/06/2023]
Abstract
Reversible addition-fragmentation chain transfer (RAFT) polymerization has proven itself as a powerful polymerization technique affording facile control of molecular weight, molecular weight distribution, architecture, and chain end groups - while maintaining a high level of tolerance for solvent and monomer functional groups. RAFT is highly suited to water as a polymerization solvent, with aqueous RAFT now utilized for applications such as controlled synthesis of ultra-high molecular weight polymers, polymerization induced self-assembly, and biocompatible polymerizations, among others. Water as a solvent represents a non-toxic, cheap, and environmentally friendly alternative to organic solvents traditionally utilized for polymerizations. This, coupled with the benefits of RAFT polymerization, makes for a powerful combination in polymer science. This perspective provides a historical account of the initial developments of aqueous RAFT polymerization at the University of Southern Mississippi from the McCormick Research Group, details practical considerations for conducting aqueous RAFT polymerizations, and highlights some of the recent advances aqueous RAFT polymerization can provide. Finally, some of the future opportunities that this versatile polymerization technique in an aqueous environment can offer are discussed, and it is anticipated that the aqueous RAFT polymerization field will continue to realize these, and other exciting opportunities into the future.
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Affiliation(s)
| | - Penelope E Jankoski
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Evan K Stacy
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Charles L McCormick
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Adam E Smith
- Department of Chemical Engineering, The University of Mississippi, Oxford, MS, 38677, USA
| | - Tristan D Clemons
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
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7
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Ledford BT, Akerman AW, Sun K, Gillis DC, Weiss JM, Vang J, Willcox S, Clemons TD, Sai H, Qiu R, Karver MR, Griffith JD, Tsihlis ND, Stupp SI, Ikonomidis JS, Kibbe MR. Peptide Amphiphile Supramolecular Nanofibers Designed to Target Abdominal Aortic Aneurysms. ACS Nano 2022; 16:7309-7322. [PMID: 35504018 PMCID: PMC9733406 DOI: 10.1021/acsnano.1c06258] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 05/26/2023]
Abstract
An abdominal aortic aneurysm (AAA) is a localized dilation of the aorta located in the abdomen that poses a severe risk of death when ruptured. The cause of AAA is not fully understood, but degradation of medial elastin due to elastolytic matrix metalloproteinases is a key step leading to aortic dilation. Current therapeutic interventions are limited to surgical repair to prevent catastrophic rupture. Here, we report the development of injectable supramolecular nanofibers using peptide amphiphile molecules designed to localize to AAA by targeting fragmented elastin, matrix metalloproteinase 2 (MMP-2), and membrane type 1 matrix metalloproteinase. We designed four targeting peptide sequences from X-ray crystallographic data and incorporated them into PA molecules via solid phase peptide synthesis. After coassembling targeted and diluent PAs at different molar ratios, we assessed their ability to form nanofibers using transmission electron microscopy and to localize to AAA in male and female Sprague-Dawley rats using light sheet fluorescence microscopy. We found that three formulations of the PA nanofibers were able to localize to AAA tissue, but the MMP-2 targeting PA substantially outperformed the other nanofibers. Additionally, we demonstrated that the MMP-2 targeting PA nanofibers had an optimal dose of 5 mg (∼12 mg/kg). Our results show that there was not a significant difference in targeting between male and female Sprague-Dawley rats. Given the ability of the MMP-2 targeting PA nanofiber to localize to AAA tissue, future studies will investigate potential diagnostic and targeted drug delivery applications for AAA.
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Affiliation(s)
- Benjamin T. Ledford
- Department of Surgery, University of Virginia, Charlottesville, VA 22903, USA
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Adam W. Akerman
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kui Sun
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - David C. Gillis
- Department of Surgery, University of Virginia, Charlottesville, VA 22903, USA
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jenna M. Weiss
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Johnny Vang
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Smaranda Willcox
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Tristan D. Clemons
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Hiroaki Sai
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Ruomeng Qiu
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Mark R. Karver
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Jack D. Griffith
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Nick D. Tsihlis
- Department of Surgery, University of Virginia, Charlottesville, VA 22903, USA
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22904, USA
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Samuel I. Stupp
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Medicine, Northwestern University, Chicago, IL 60611, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - John S. Ikonomidis
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Melina R. Kibbe
- Department of Surgery, University of Virginia, Charlottesville, VA 22903, USA
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22904, USA
- Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Cook AB, Clemons TD. Bottom‐Up versus Top‐Down Strategies for Morphology Control in Polymer‐Based Biomedical Materials. Advanced NanoBiomed Research 2021. [DOI: 10.1002/anbr.202100087] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] Open
Affiliation(s)
- Alexander B. Cook
- Laboratory of Nanotechnology for Precision Medicine Istituto Italiano di Tecnologia Via Morego 30 Genova 16163 Italy
| | - Tristan D. Clemons
- School of Polymer Science and Engineering University of Southern Mississippi Hattiesburg MS 39406 USA
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9
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Peters EB, Karver MR, Sun K, Gillis DC, Biswas S, Clemons TD, He W, Tsihlis ND, Stupp SI, Kibbe MR. Self-Assembled Peptide Amphiphile Nanofibers for Controlled Therapeutic Delivery to the Atherosclerotic Niche. Adv Ther (Weinh) 2021; 4:2100103. [PMID: 34926792 PMCID: PMC8680456 DOI: 10.1002/adtp.202100103] [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] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 11/08/2022]
Abstract
Atherosclerotic plaque remains the leading contributor to cardiovascular disease and requires invasive surgical procedures for its removal. Nanomedicine offers a minimally invasive approach to alleviate plaque burden by targeted therapeutic delivery. However, nanocarriers are limited without the ability to sense and respond to the diseased microenvironment. In this study, targeted self-assembled peptide amphiphile (PA) nanofibers were developed that cleave in response to biochemical cues expressed in atherosclerotic lesions-reactive oxygen species (ROS) and intracellular glutathione-to deliver a liver X receptor agonist (LXR) to enhance macrophage cholesterol efflux. The PAs released LXR in response to physiological levels of ROS and reducing agents and could be co-assembled with plaque-targeting PAs to form nanofibers. The resulting LXR PA nanofibers promoted cholesterol efflux from macrophages in vitro as well as LXR alone and with lower cytotoxicity. Further, the ApoA1-LXR PA nanofibers targeted plaque within an atherosclerotic mouse model in vivo and activated ATP-binding cassette A1 (ABCA1) expression as well as LXR alone with reduced liver toxicity. Taken together, these results demonstrate the potential of self-assembled PA nanofibers for controlled therapeutic delivery to the atherosclerotic niche.
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Affiliation(s)
- Erica B. Peters
- Department of Surgery, Division of Vascular Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Mark R. Karver
- Simpson Querrey Institute, Northwestern University, Chicago, IL 60611, USA
| | - Kui Sun
- Department of Surgery, Division of Vascular Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - David C. Gillis
- Department of Surgery, Division of Vascular Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Suvendu Biswas
- Simpson Querrey Institute, Northwestern University, Chicago, IL 60611, USA
| | - Tristan D. Clemons
- Simpson Querrey Institute, Northwestern University, Chicago, IL 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | - Wenhan He
- Department of Surgery, Division of Vascular Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Nick D. Tsihlis
- Department of Surgery, Division of Vascular Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Samuel I. Stupp
- Simpson Querrey Institute, Northwestern University, Chicago, IL 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science & Engineering and Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Melina R. Kibbe
- Department of Surgery, Division of Vascular Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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10
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Marulanda K, Mercel A, Gillis DC, Sun K, Gambarian M, Roark J, Weiss J, Tsihlis ND, Karver MR, Centeno SR, Peters EB, Clemons TD, Stupp SI, McLean SE, Kibbe MR. Intravenous Delivery of Lung-Targeted Nanofibers for Pulmonary Hypertension in Mice. Adv Healthc Mater 2021; 10:e2100302. [PMID: 34061473 PMCID: PMC8273153 DOI: 10.1002/adhm.202100302] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 02/16/2021] [Revised: 03/15/2021] [Indexed: 01/11/2023]
Abstract
Pulmonary hypertension is a highly morbid disease with no cure. Available treatments are limited by systemic adverse effects due to non-specific biodistribution. Self-assembled peptide amphiphile (PA) nanofibers are biocompatible nanomaterials that can be modified to recognize specific biological markers to provide targeted drug delivery and reduce off-target toxicity. Here, PA nanofibers that target the angiotensin I-converting enzyme and the receptor for advanced glycation end-products (RAGE) are developed, as both proteins are overexpressed in the lung with pulmonary hypertension. It is demonstrated that intravenous delivery of RAGE-targeted nanofibers containing the targeting epitope LVFFAED (LVFF) significantly accumulated within the lung in a chronic hypoxia-induced pulmonary hypertension mouse model. Using 3D light sheet fluorescence microscopy, it is shown that LVFF nanofiber localization is specific to the diseased pulmonary tissue with immunofluorescence analysis demonstrating colocalization of the targeted nanofiber to RAGE in the hypoxic lung. Furthermore, biodistribution studies show that significantly more LVFF nanofibers localized to the lung compared to major off-target organs. Targeted nanofibers are retained within the pulmonary tissue for 24 h after injection. Collectively, these data demonstrate the potential of a RAGE-targeted nanomaterial as a drug delivery platform to treat pulmonary hypertension.
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Affiliation(s)
- Kathleen Marulanda
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Alexandra Mercel
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - David C Gillis
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Kui Sun
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Maria Gambarian
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Joshua Roark
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Jenna Weiss
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Nick D Tsihlis
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Mark R Karver
- Simpson Querrey Institute, Northwestern University, 303 E. Superior Street, Chicago, IL, 60611, USA
| | - S Ruben Centeno
- Department of Pediatrics, University of North Carolina, 260 MacNider Building CB# 7220, Chapel Hill, NC, 27599, USA
| | - Erica B Peters
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Tristan D Clemons
- Simpson Querrey Institute, Northwestern University, 303 E. Superior Street, Chicago, IL, 60611, USA
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, 303 E. Superior Street, Chicago, IL, 60611, USA
| | - Sean E McLean
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Melina R Kibbe
- Department of Surgery, University of North Carolina, 4041 Burnett Womack, 101 Manning Drive, Chapel Hill, NC, 27599, USA
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11
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Mercel AI, Marulanda K, Gillis DC, Sun K, Clemons TD, Willcox S, Griffith J, Peters EB, Karver MR, Tsihlis ND, Maile R, Stupp SI, Kibbe MR. Development of novel nanofibers targeted to smoke-injured lungs. Biomaterials 2021; 274:120862. [PMID: 33975274 DOI: 10.1016/j.biomaterials.2021.120862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 11/02/2020] [Revised: 03/02/2021] [Accepted: 04/26/2021] [Indexed: 11/26/2022]
Abstract
Smoke inhalation injury is associated with significant mortality and current therapies remain supportive. The purpose of our study was to identify proteins upregulated in the lung after smoke inhalation injury and develop peptide amphiphile nanofibers that target these proteins. We hypothesize that nanofibers targeted to angiotensin-converting enzyme or receptor for advanced glycation end products will localize to smoke-injured lungs. METHODS Five targeting sequences were incorporated into peptide amphiphile monomers methodically to optimize nanofiber formation. Nanofiber formation was assessed by conventional transmission electron microscopy. Rats received 8 min of wood smoke. Levels of angiotensin-converting enzyme and receptor for advanced glycation end products were evaluated by immunofluorescence. Rats received the targeted nanofiber 23 h after injury via tail vein injection. Nanofiber localization was determined by fluorescence quantification. RESULTS Peptide amphiphile purity (>95%) and nanofiber formation were confirmed. Target proteins were increased in smoke inhalation versus sham (p < 0.001). After smoke inhalation and injection of targeted nanofibers, we found a 10-fold increase in angiotensin-converting enzyme-targeted nanofiber localization to lung (p < 0.001) versus sham with minimal localization of non-targeted nanofiber (p < 0.001). CONCLUSIONS We synthesized, characterized, and evaluated systemically delivered targeted nanofibers that localized to the site of smoke inhalation injury in vivo. Angiotensin-converting enzyme-targeted nanofibers serve as the foundation for developing a novel nanotherapeutic that treats smoke inhalation lung injury.
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Affiliation(s)
- Alexandra I Mercel
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Kathleen Marulanda
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - David C Gillis
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Kui Sun
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Tristan D Clemons
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA; Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Smaranda Willcox
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Jack Griffith
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Erica B Peters
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Mark R Karver
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
| | - Nick D Tsihlis
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Rob Maile
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA; Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC, 27599, USA; Curriculum of Toxicology and Environmental Medicine, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA; Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA; Department of Materials Science & Engineering, Northwestern University, Evanston, IL, 60208, USA; Department of Medicine, Northwestern University, Chicago, IL, 60611, USA; Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Melina R Kibbe
- Department of Surgery, University of North Carolina, Chapel Hill, NC, 27599, USA; Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, 27599, USA.
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12
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Edelbrock AN, Clemons TD, Chin SM, Roan JJW, Bruckner EP, Álvarez Z, Edelbrock JF, Wek KS, Stupp SI. Superstructured Biomaterials Formed by Exchange Dynamics and Host-Guest Interactions in Supramolecular Polymers. Adv Sci (Weinh) 2021; 8:2004042. [PMID: 33898187 PMCID: PMC8061421 DOI: 10.1002/advs.202004042] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/21/2020] [Indexed: 05/12/2023]
Abstract
Dynamic and reversible assembly of molecules is ubiquitous in the hierarchical superstructures of living systems and plays a key role in cellular functions. Recent work from the laboratory reported on the reversible formation of such superstructures in systems of peptide amphiphiles conjugated to oligonucleotides and electrostatically complimentary peptide sequences. Here, a supramolecular system is reported upon where exchange dynamics and host-guest interactions between β-cyclodextrin and adamantane on peptide amphiphiles lead to superstructure formation. Superstructure formation with bundled nanoribbons generates a mechanically robust hydrogel with a highly porous architecture that can be 3D printed. Functionalization of the porous superstructured material with a biological signal results in a matrix with significant in vitro bioactivity toward neurons that could be used as a supramolecular model to design novel biomaterials.
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Affiliation(s)
- Alexandra N. Edelbrock
- Department of Biomedical EngineeringNorthwestern UniversityEvanstonIL60208USA
- Simpson Querrey InstituteNorthwestern UniversityChicagoIL60611USA
| | - Tristan D. Clemons
- Simpson Querrey InstituteNorthwestern UniversityChicagoIL60611USA
- Department of ChemistryNorthwestern UniversityEvanstonIL60208USA
| | - Stacey M. Chin
- Department of ChemistryNorthwestern UniversityEvanstonIL60208USA
| | - Joshua J. W. Roan
- Department of Materials Science and EngineeringNorthwestern UniversityEvanstonIL60208USA
| | - Eric P. Bruckner
- Department of Materials Science and EngineeringNorthwestern UniversityEvanstonIL60208USA
| | - Zaida Álvarez
- Simpson Querrey InstituteNorthwestern UniversityChicagoIL60611USA
- Department of MedicineNorthwestern UniversityChicagoIL60611USA
| | - Jack F. Edelbrock
- Simpson Querrey InstituteNorthwestern UniversityChicagoIL60611USA
- Department of Materials Science and EngineeringNorthwestern UniversityEvanstonIL60208USA
- Department of MedicineNorthwestern UniversityChicagoIL60611USA
| | - Kristen S. Wek
- Department of Materials Science and EngineeringNorthwestern UniversityEvanstonIL60208USA
| | - Samuel I. Stupp
- Department of Biomedical EngineeringNorthwestern UniversityEvanstonIL60208USA
- Simpson Querrey InstituteNorthwestern UniversityChicagoIL60611USA
- Department of ChemistryNorthwestern UniversityEvanstonIL60208USA
- Department of Materials Science and EngineeringNorthwestern UniversityEvanstonIL60208USA
- Department of MedicineNorthwestern UniversityChicagoIL60611USA
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13
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Bury MI, Fuller NJ, Clemons TD, Sturm RM, Morrison CD, Lisy‐Snow DC, Nolan BG, Tarczynski C, Ayello EMT, Boyce A, Muckian B, Ahmad N, Hunter CJ, Karver MR, Stupp SI, Sharma AK. Self‐Assembling Nanofibers Inhibit Inflammation in a Murine Model of Crohn's‐Disease‐Like Ileitis. Adv Therap 2021. [DOI: 10.1002/adtp.202000274] [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: 12/17/2022]
Affiliation(s)
- Matthew I. Bury
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Natalie J. Fuller
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Tristan D. Clemons
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Renea M. Sturm
- Department of Urology University of California Los Angeles 200 Medical Plaza Driveway #140 Los Angeles CA 90095 USA
| | - Christopher D. Morrison
- Department of Urology Northwestern University Feinberg School of Medicine 676 North St. Clair Suite 2300 Chicago IL 60611 USA
| | - Devon C. Lisy‐Snow
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Bonnie G. Nolan
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Christopher Tarczynski
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
| | - Emily M. T. Ayello
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
| | - Amber Boyce
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Bridget Muckian
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Nida Ahmad
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Catherine J. Hunter
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Lurie Children's Hospital of Chicago 255 East Superior Street Chicago IL 60611 USA
| | - Mark R. Karver
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
| | - Samuel I. Stupp
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- McCormick School of Engineering Department of Biomedical Engineering Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Department of Materials Science and Engineering Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Feinberg School of Medicine Department of Medicine Northwestern University 420 E Superior Street Chicago IL 60611 USA
| | - Arun K. Sharma
- Simpson Querrey Institute (SQI) Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Department of Urology Northwestern University Feinberg School of Medicine 676 North St. Clair Suite 2300 Chicago IL 60611 USA
- McCormick School of Engineering Department of Biomedical Engineering Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Stanley Manne Children's Research Institute (SMCRI) 303 East Superior Street Chicago IL 60611 USA
- Center for Advanced Regenerative Engineering (CARE) 2145 Sheridan Road Evanston IL 60208 USA
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14
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McCallum NC, Son FA, Clemons TD, Weigand SJ, Gnanasekaran K, Battistella C, Barnes BE, Abeyratne-Perera H, Siwicka ZE, Forman CJ, Zhou X, Moore MH, Savin DA, Stupp SI, Wang Z, Vora GJ, Johnson BJ, Farha OK, Gianneschi NC. Allomelanin: A Biopolymer of Intrinsic Microporosity. J Am Chem Soc 2021; 143:4005-4016. [PMID: 33673734 DOI: 10.1021/jacs.1c00748] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Melanin is a ubiquitous natural pigment found in a diverse array of organisms. Allomelanin is a class of nitrogen-free melanin often found in fungi. Herein, we find artificial allomelanin analogues exhibit high intrinsic microporosity and describe an approach for further increasing and tuning that porosity. Notably, the synthetic method involves an oxidative polymerization of 1,8-DHN in water, negating the need for multiple complex templating steps and avoiding expensive or complex chemical precursors. The well-defined morphologies of these nanomaterials were elucidated by a combination of electron microscopy and scattering methods, yielding to high-resolution 3D reconstruction based on small-angle X-ray scattering (SAXS) results. Synthetic allomelanin nanoparticles exhibit high BET areas, up to 860 m2/g, and are capable of ammonia capture up to 17.0 mmol/g at 1 bar. In addition, these nanomaterials can adsorb nerve agent simulants in solution and as a coating on fabrics with high breathability where they prevent breakthrough. We also confirmed that naturally derived fungal melanin can adsorb nerve gas simulants in solution efficiently despite lower porosity than synthetic analogues. Our approach inspires further analysis of yet to be discovered biological materials of this class where melanins with intrinsic microporosity may be linked to evolutionary advantages in relevant organisms and may in turn inspire the design of new high surface area materials.
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Affiliation(s)
| | | | - Tristan D Clemons
- Simpson Querrey Institute, Northwestern University, Chicago, Illinois 60208, United States
| | - Steven J Weigand
- DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) Synchrotron Research Center, Northwestern University, Argonne, Illinois 60208, United States
| | | | | | - Brooke E Barnes
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Hashanthi Abeyratne-Perera
- American Society for Engineering Education Postdoctoral Research Associate, US Naval Research Laboratory, Washington, D.C. 20375, United States
| | | | | | | | - Martin H Moore
- Center for Bio/Molecular Science & Engineering, US Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Daniel A Savin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, Chicago, Illinois 60208, United States.,Department of Medicine, Northwestern University, Chicago, Illinois 60208, United States
| | - Zheng Wang
- Center for Bio/Molecular Science & Engineering, US Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Gary J Vora
- Center for Bio/Molecular Science & Engineering, US Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Brandy J Johnson
- Center for Bio/Molecular Science & Engineering, US Naval Research Laboratory, Washington, D.C. 20375, United States
| | | | - Nathan C Gianneschi
- Simpson Querrey Institute, Northwestern University, Chicago, Illinois 60208, United States.,Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
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15
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Sun H, Cao W, Zang N, Clemons TD, Scheutz GM, Hu Z, Thompson MP, Liang Y, Vratsanos M, Zhou X, Choi W, Sumerlin BS, Stupp SI, Gianneschi NC. Proapoptotic Peptide Brush Polymer Nanoparticles via Photoinitiated Polymerization-Induced Self-Assembly. Angew Chem Int Ed Engl 2020; 59:19136-19142. [PMID: 32659039 PMCID: PMC7722202 DOI: 10.1002/anie.202006385] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [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: 05/02/2020] [Revised: 06/29/2020] [Indexed: 02/06/2023]
Abstract
Herein, we report the photoinitiated polymerization-induced self-assembly (photo-PISA) of spherical micelles consisting of proapoptotic peptide-polymer amphiphiles. The one-pot synthetic approach yielded micellar nanoparticles at high concentrations and at scale (150 mg mL-1 ) with tunable peptide loadings up to 48 wt. %. The size of the micellar nanoparticles was tuned by varying the lengths of hydrophobic and hydrophilic building blocks. Critically, the peptide-functionalized nanoparticles imbued the proapoptotic "KLA" peptides (amino acid sequence: KLAKLAKKLAKLAK) with two key properties otherwise not inherent to the sequence: 1) proteolytic resistance compared to the oligopeptide alone; 2) significantly enhanced cell uptake by multivalent display of KLA peptide brushes. The result was demonstrated improved apoptosis efficiency in HeLa cells. These results highlight the potential of photo-PISA in the large-scale synthesis of functional, proteolytically resistant peptide-polymer conjugates for intracellular delivery.
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Affiliation(s)
- Hao Sun
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Wei Cao
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Nanzhi Zang
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Tristan D Clemons
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, IL, 60611, USA
| | - Georg M Scheutz
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Ziying Hu
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Matthew P Thompson
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yifei Liang
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Maria Vratsanos
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Xuhao Zhou
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Wonmin Choi
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Brent S Sumerlin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Samuel I Stupp
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, IL, 60611, USA
- Department of Medicine, Northwestern University, Evanston, IL, 60208, USA
| | - Nathan C Gianneschi
- Department of Chemistry, Department of Materials Science & Engineering, Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Pharmacology, International Institute for Nanotechnology, Chemistry of Life Processes Institute, Northwestern University, Evanston, IL, 60208, USA
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, IL, 60611, USA
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16
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Abstract
One hundred years ago Hermann Staudinger was strongly criticized by his scientific peers for his macromolecular hypothesis, but today it is hard to imagine a world without polymers. His hypothesis described polymers as macromolecules composed of large numbers of structural units connected by covalent bonds. In the 1990s the concept of supramolecular polymers emerged in the scientific literature as discrete entities of large molar mass comparable to that of classical polymers but built through non-covalent bonds among monomers. Supramolecular polymers exist in biological systems, and potentially blend the physical properties of covalent polymers with unique features such as high degrees of internal order within the polymeric structure, defined shapes, and novel dynamics. This trend article provides a summary of seminal contributions in supramolecular polymerization and provides recent examples from the Stupp laboratory to demonstrate the potential applications of an exciting class of materials composed fully or partially of supramolecular polymers. In closing, we provide our perspective on future opportunities provided by this field at the onset of a second century of polymers. It is our objective here to demonstrate that this second century could be as prosperous, if not more so, than the preceding one.
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Affiliation(s)
- Tristan D Clemons
- Simpson Querrey Institute, Northwestern University, Chicago, IL. 60611 USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, Chicago, IL. 60611 USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Medicine, Northwestern University, Chicago, IL, 60611, USA
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17
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Sun H, Cao W, Zang N, Clemons TD, Scheutz GM, Hu Z, Thompson MP, Liang Y, Vratsanos M, Zhou X, Choi W, Sumerlin BS, Stupp SI, Gianneschi NC. Proapoptotic Peptide Brush Polymer Nanoparticles via Photoinitiated Polymerization‐Induced Self‐Assembly. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hao Sun
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Wei Cao
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Nanzhi Zang
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Tristan D. Clemons
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
- Simpson Querrey Institute Northwestern University 303 East Superior Street Chicago IL 60611 USA
| | - Georg M. Scheutz
- George & Josephine Butler Polymer Research Laboratory Center for Macromolecular Science & Engineering Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Ziying Hu
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Matthew P. Thompson
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Yifei Liang
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Maria Vratsanos
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Xuhao Zhou
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Wonmin Choi
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
| | - Brent S. Sumerlin
- George & Josephine Butler Polymer Research Laboratory Center for Macromolecular Science & Engineering Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Samuel I. Stupp
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
- Simpson Querrey Institute Northwestern University 303 East Superior Street Chicago IL 60611 USA
- Department of Medicine Northwestern University Evanston IL 60208 USA
| | - Nathan C. Gianneschi
- Department of Chemistry Department of Materials Science & Engineering Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
- Department of Pharmacology International Institute for Nanotechnology Chemistry of Life Processes Institute Northwestern University Evanston IL 60208 USA
- Simpson Querrey Institute Northwestern University 303 East Superior Street Chicago IL 60611 USA
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18
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Lewis JA, Freeman R, Carrow JK, Clemons TD, Palmer LC, Stupp SI. Transforming Growth Factor β-1 Binding by Peptide Amphiphile Hydrogels. ACS Biomater Sci Eng 2020; 6:4551-4560. [DOI: 10.1021/acsbiomaterials.0c00679] [Citation(s) in RCA: 9] [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: 02/06/2023]
Affiliation(s)
- Jacob A. Lewis
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
| | - Ronit Freeman
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
| | - James K. Carrow
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
| | - Tristan D. Clemons
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Liam C. Palmer
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Samuel I. Stupp
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, United States
- Department of Medicine, Northwestern University, 676 North St. Clair, Chicago, Illinois 60611, United States
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19
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Klein MK, Kassam HA, Lee RH, Bergmeier W, Peters EB, Gillis DC, Dandurand BR, Rouan JR, Karver MR, Struble MD, Clemons TD, Palmer LC, Gavitt B, Pritts TA, Tsihlis ND, Stupp SI, Kibbe MR. Development of Optimized Tissue-Factor-Targeted Peptide Amphiphile Nanofibers to Slow Noncompressible Torso Hemorrhage. ACS Nano 2020; 14:6649-6662. [PMID: 32469498 PMCID: PMC7587470 DOI: 10.1021/acsnano.9b09243] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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] [Indexed: 05/21/2023]
Abstract
Noncompressible torso hemorrhage accounts for a significant portion of preventable trauma deaths. We report here on the development of injectable, targeted supramolecular nanotherapeutics based on peptide amphiphile (PA) molecules that are designed to target tissue factor (TF) and, therefore, selectively localize to sites of injury to slow hemorrhage. Eight TF-targeting sequences were identified, synthesized into PA molecules, coassembled with nontargeted backbone PA at various weight percentages, and characterized via circular dichroism spectroscopy, transmission electron microscopy, and X-ray scattering. Following intravenous injection in a rat liver hemorrhage model, two of these PA nanofiber coassemblies exhibited the most specific localization to the site of injury compared to controls (p < 0.05), as quantified using immunofluorescence imaging of injured liver and uninjured organs. To determine if the nanofibers were targeting TF in vivo, a mouse saphenous vein laser injury model was performed and showed that TF-targeted nanofibers colocalized with fibrin, demonstrating increased levels of nanofiber at TF-rich sites. Thromboelastograms obtained using samples of heparinized rat whole blood containing TF demonstrated that no clots were formed in the absence of TF-targeted nanofibers. Lastly, both PA nanofiber coassemblies decreased blood loss in comparison to sham and backbone nanofiber controls by 35-59% (p < 0.05). These data demonstrate an optimal TF-targeted nanofiber that localizes selectively to sites of injury and TF exposure, and, interestingly, reduces blood loss. This research represents a promising initial phase in the development of a TF-targeted injectable therapeutic to reduce preventable deaths from hemorrhage.
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Affiliation(s)
- Mia K. Klein
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Hussein Aziz Kassam
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Robert H. Lee
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599, USA
- UNC Blood Research Center, University of North Carolina, Chapel Hill, NC, 27514, USA
| | - Wolfgang Bergmeier
- Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, 27599, USA
- UNC Blood Research Center, University of North Carolina, Chapel Hill, NC, 27514, USA
| | - Erica B. Peters
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - David C. Gillis
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Brooke R. Dandurand
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Jessica R. Rouan
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Mark R. Karver
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
| | - Mark D. Struble
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
| | - Tristan D. Clemons
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- School of Molecular Sciences, University of Western Australia, Perth, WA, 6009, Australia
| | - Liam C. Palmer
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Brian Gavitt
- United States Air Force School of Aerospace Medicine, Wright-Patterson AFB, OH, 45433, USA
| | - Timothy A. Pritts
- Department of Surgery, University of Cincinnati, Cincinnati, OH, 45267, USA
| | - Nick D. Tsihlis
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Samuel I. Stupp
- Simpson Querrey Institute, Northwestern University, Chicago, IL, 60611, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Medicine, Northwestern University, Chicago, IL, 60611, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Melina R. Kibbe
- Department of Surgery and Center for Nanotechnology in Drug Delivery, University of North Carolina, Chapel Hill, NC, 27599, USA
- Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, 27599, USA
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20
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Affiliation(s)
- Samuel I. Stupp
- Simpson Querrey Institute Northwestern University Chicago IL 60611 USA
- Department of Chemistry Northwestern University Evanston IL 60208 USA
- Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA
- Department of Biomedical Engineering Northwestern University Evanston IL 60208 USA
- Department of Medicine Northwestern University Chicago IL 60611 USA
| | - Tristan D. Clemons
- Simpson Querrey Institute Northwestern University Chicago IL 60611 USA
- Department of Chemistry Northwestern University Evanston IL 60208 USA
| | - James K. Carrow
- Simpson Querrey Institute Northwestern University Chicago IL 60611 USA
| | - Hiroaki Sai
- Simpson Querrey Institute Northwestern University Chicago IL 60611 USA
| | - Liam C. Palmer
- Simpson Querrey Institute Northwestern University Chicago IL 60611 USA
- Department of Chemistry Northwestern University Evanston IL 60208 USA
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21
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McClelland KP, Clemons TD, Stupp SI, Weiss EA. Semiconductor Quantum Dots Are Efficient and Recyclable Photocatalysts for Aqueous PET-RAFT Polymerization. ACS Macro Lett 2020; 9:7-13. [PMID: 35638658 DOI: 10.1021/acsmacrolett.9b00891] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This Letter describes the use of CdSe quantum dots (QDs) as photocatalysts for photoinduced electron transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization of a series of aqueous acrylamides and acrylates. The high colloidal solubility and photostability of these QDs allowed polymerization to occur with high efficiency (>90% conversion in 2.5 h), low dispersity (PDI < 1.1), and ultralow catalyst loading (<0.5 ppm). The use of protein concentrators enabled the removal of the photocatalyst from the polymer and monomer with tolerable metal contamination (8.41 ug/g). These isolated QDs could be recycled for four separate polymerizations without a significant decrease in efficiency. By changing the pore size of the protein concentrators, the QDs and polymer could be separated from the remaining monomer, allowing for the synthesis of block copolymers using a single batch of QDs with minimal purification steps and demonstrating the fidelity of chain ends.
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Affiliation(s)
| | - Tristan D. Clemons
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
| | - Samuel I. Stupp
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, United States
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22
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Evans CW, Edwards S, Kretzmann JA, Nealon GL, Singh R, Clemons TD, Norret M, Boyer CA, Iyer KS. Synthetic copolymer conjugates of docetaxel and in vitro assessment of anticancer efficacy. NEW J CHEM 2020. [DOI: 10.1039/d0nj03425h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Docetaxel (DTX) is a widely used chemotherapy drug that is associated with numerous side effects and limited bioavailability. We show synthetic copolymer conjugates of docetaxel with drug loading up to 20% and assess their efficacy in MCF-7 cells.
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Affiliation(s)
- Cameron W. Evans
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Sky Edwards
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | | | - Gareth L. Nealon
- Centre for Microscopy
- Characterisation and Analysis
- University of Western Australia
- Crawley
- Australia
| | - Ruhani Singh
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Tristan D. Clemons
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Marck Norret
- School of Molecular Sciences
- University of Western Australia
- Crawley
- Australia
| | - Cyrille A. Boyer
- School of Chemical Engineering and Cluster for Macromolecular Design
- Faculty of Engineering
- The University of New South Wales
- Kensington
- Australia
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23
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Naidu PSR, Norret M, Dunlop SA, Fitzgerald M, Clemons TD, Iyer KS. Novel Hydrophilic Copolymer-Based Nanoparticle Enhances the Therapeutic Efficiency of Doxorubicin in Cultured MCF-7 Cells. ACS Omega 2019; 4:17083-17089. [PMID: 31656880 PMCID: PMC6811859 DOI: 10.1021/acsomega.8b02894] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 03/29/2019] [Indexed: 06/10/2023]
Abstract
Nanoparticle drug delivery applications have predominantly focused on the entrapment and delivery of hydrophobic molecules with poor water solubility. However, benefits can also be obtained from nanoparticle-based delivery of hydrophilic therapeutics. This study reports on the development of a p(HEMA-ran-GMA)-based nanoparticle synthesized via a spontaneous water-in-oil inverse nanoemulsion to deliver doxorubicin, a water-soluble chemotherapeutic. High drug loading efficiency and sustained release of doxorubicin from Cy5-functionalized p(HEMA-ran-GMA) nanoparticles enabled effective inhibition of the MCF-7 human breast cancer derived cell line. Direct comparative analyses with a hydrophobic PGMA nanoparticle demonstrated enhanced capabilities of the p(HEMA-ran-GMA)-based nanoparticle in vitro. The results suggest that p(HEMA-ran-GMA)-based nanoparticles, which are better suited for hydrophilic drug loading and delivery, may have the potential for the improved therapeutic effect in vivo by enhanced permeation and retention of the nanoparticles by avoidance of off-site side effects of the chemotherapeutic.
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Affiliation(s)
- Priya S. R. Naidu
- School
of Molecular Sciences and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Marck Norret
- School
of Molecular Sciences and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Sarah A. Dunlop
- School
of Molecular Sciences and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Melinda Fitzgerald
- School
of Molecular Sciences and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
- Curtin Health Innovation Research Institute, Curtin University
and the Perron Institute for Neurological and Translational Science,
Ralph and Patricia Sarich Neuroscience Research Institute Building, QEII Medical Centre, Nedlands, WA 6009, Australia
| | - Tristan D. Clemons
- School
of Molecular Sciences and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - K. Swaminathan Iyer
- School
of Molecular Sciences and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
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24
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Mansukhani NA, Peters EB, So MM, Albaghdadi MS, Wang Z, Karver MR, Clemons TD, Laux JP, Tsihlis ND, Stupp SI, Kibbe MR. Peptide Amphiphile Supramolecular Nanostructures as a Targeted Therapy for Atherosclerosis. Macromol Biosci 2019. [DOI: 10.1002/mabi.201970016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Mansukhani NA, Peters EB, So MM, Albaghdadi MS, Wang Z, Karver MR, Clemons TD, Laux JP, Tsihlis ND, Stupp SI, Kibbe MR. Peptide Amphiphile Supramolecular Nanostructures as a Targeted Therapy for Atherosclerosis. Macromol Biosci 2019; 19:e1900066. [PMID: 31066494 DOI: 10.1002/mabi.201900066] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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: 02/25/2019] [Revised: 04/15/2019] [Accepted: 04/18/2019] [Indexed: 12/13/2022]
Abstract
The rising prevalence of cardiovascular disease worldwide necessitates novel therapeutic approaches to manage atherosclerosis. Intravenously administered nanostructures are a promising noninvasive approach to deliver therapeutics that reduce plaque burden. The drug liver X receptor agonist GW3965 (LXR) can reduce atherosclerosis by promoting cholesterol efflux from plaque but causes liver toxicity when administered systemically at effective doses, thus preventing its clinical use. The ability of peptide amphiphile nanofibers containing apolipoprotein A1-derived targeting peptide 4F to serve as nanocarriers for LXR delivery (ApoA1-LXR PA) in vivo is investigated here. These nanostructures are found to successfully target atherosclerotic lesions in a mouse model within 24 h of injection. After 8 weeks of intravenous administration, the nanostructures significantly reduce plaque burden in both male and female mice to a similar extent as LXR alone in comparison to saline-treated controls. Furthermore, they do not cause increased liver toxicity in comparison to LXR treatments, which may be related to more controlled release by the nanostructure. These findings demonstrate the potential of supramolecular nanostructures as safe, effective drug nanocarriers to manage atherosclerosis.
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Affiliation(s)
- Neel A Mansukhani
- Division of Vascular Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, 251 East Huron St., Galter 3-150, Chicago, IL, 60611, USA.,Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA
| | - Erica B Peters
- Department of Surgery, University of North Carolina at Chapel Hill, 3001 Burnett-Womack Building, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Miranda M So
- Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA.,Department of Materials Science and Engineering, McCormick School of Engineering and Applied Science, Northwestern University, 2220 Campus Drive, Room 2036, Evanston, IL, 60208, USA
| | - Mazen S Albaghdadi
- Division of Vascular Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, 251 East Huron St., Galter 3-150, Chicago, IL, 60611, USA.,Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA
| | - Zheng Wang
- Division of Vascular Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, 251 East Huron St., Galter 3-150, Chicago, IL, 60611, USA.,Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA
| | - Mark R Karver
- Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA
| | - Tristan D Clemons
- Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA.,Department of Chemistry, Northwestern University, 2145 N. Sheridan Rd., Tech K148, Evanston, IL, 60208, USA
| | - Jeffrey P Laux
- Biostatistics, Epidemiology and Research Design, NC Translational and Clinical Sciences Institute, University of North Carolina, Chapel Hill, NC, 27599-7420, USA
| | - Nick D Tsihlis
- Division of Vascular Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, 251 East Huron St., Galter 3-150, Chicago, IL, 60611, USA.,Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA.,Department of Surgery, University of North Carolina at Chapel Hill, 3001 Burnett-Womack Building, 101 Manning Drive, Chapel Hill, NC, 27599, USA
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA.,Department of Materials Science and Engineering, McCormick School of Engineering and Applied Science, Northwestern University, 2220 Campus Drive, Room 2036, Evanston, IL, 60208, USA.,Department of Chemistry, Northwestern University, 2145 N. Sheridan Rd., Tech K148, Evanston, IL, 60208, USA.,Department of Medicine, Northwestern University, 676 N. St. Clair St., Arkes Suite 2330, Chicago, IL, 60611, USA.,Department of Biomedical Engineering, Technological Institute, Northwestern University, 2145 N. Sheridan Rd., Evanston, IL, 60208, USA
| | - Melina R Kibbe
- Division of Vascular Surgery, Department of Surgery, Feinberg School of Medicine, Northwestern University, 251 East Huron St., Galter 3-150, Chicago, IL, 60611, USA.,Simpson Querrey Institute, Northwestern University, 303 E. Superior, Suite 11-131, Chicago, IL, 60611, USA.,Department of Surgery, University of North Carolina at Chapel Hill, 3001 Burnett-Womack Building, 101 Manning Drive, Chapel Hill, NC, 27599, USA.,Department of Bioengineering, University of North Carolina, 333 South Columbia Street, Chapel Hill, NC, 27514, USA
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26
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Sorolla A, Wang E, Clemons TD, Evans CW, Plani-Lam JH, Golden E, Dessauvagie B, Redfern AD, Swaminathan-Iyer K, Blancafort P. Triple-hit therapeutic approach for triple negative breast cancers using docetaxel nanoparticles, EN1-iPeps and RGD peptides. Nanomedicine 2019; 20:102003. [PMID: 31055077 DOI: 10.1016/j.nano.2019.04.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 04/11/2019] [Accepted: 04/11/2019] [Indexed: 12/20/2022]
Abstract
Triple negative breast cancers (TNBC) are aggressive malignancies for which chemotherapy is the only treatment option. Many TNBC acquire chemotherapy resistance, notably docetaxel, which has been associated with the overexpression of transcription factors (TFs), such as ENGRAILED1 (EN1). Here, we have developed a tumor delivery system for docetaxel-PGMA-PAA-nanoparticles and interference peptides designed to specifically inhibit EN1 (EN1-iPeps). To promote tumor specific targeting, we functionalized these nanoparticles with EN1-iPeps engineered with RGD sequences. We found that these peptides reduce cell viability and induce apoptosis in TNBC cells with negligible effects on normal cells (EN1-). Moreover, EN1-RGD-iPeps-mediated nanoparticle internalization into breast cancer cells was via integrins and intravenous injection of this nanoformulation increased tumor accumulation. Furthermore, docetaxel nanoparticles functionalized with EN1-RGD-iPeps significantly reduced TNBC growth both in vitro and in vivo without showing toxicity. Our results suggest that this targeted nanoformulation represents a new and safe therapeutic approach for chemoresistant TNBCs.
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Affiliation(s)
- Anabel Sorolla
- Cancer Epigenetics, Harry Perkins Institute of Medical Research Nedlands, WA 6009, Australia; School of Human Sciences, The University of Western Australia Crawley, WA 6009, Australia.
| | - Edina Wang
- Cancer Epigenetics, Harry Perkins Institute of Medical Research Nedlands, WA 6009, Australia; School of Human Sciences, The University of Western Australia Crawley, WA 6009, Australia
| | - Tristan D Clemons
- School of Molecular Science, The University of Western Australia, Crawley, WA 6009, Australia
| | - Cameron W Evans
- School of Molecular Science, The University of Western Australia, Crawley, WA 6009, Australia
| | - Janice Hc Plani-Lam
- Cancer Epigenetics, Harry Perkins Institute of Medical Research Nedlands, WA 6009, Australia; School of Human Sciences, The University of Western Australia Crawley, WA 6009, Australia
| | - Emily Golden
- Cancer Epigenetics, Harry Perkins Institute of Medical Research Nedlands, WA 6009, Australia; School of Human Sciences, The University of Western Australia Crawley, WA 6009, Australia
| | - Ben Dessauvagie
- Division of Pathology and Laboratory Medicine, Medical School, The University of Western Australia, Crawley, WA 6009, Australia
| | - Andrew D Redfern
- School of Medicine, The University of Western Australia, Crawley, WA 6009, Australia
| | - K Swaminathan-Iyer
- School of Molecular Science, The University of Western Australia, Crawley, WA 6009, Australia
| | - Pilar Blancafort
- Cancer Epigenetics, Harry Perkins Institute of Medical Research Nedlands, WA 6009, Australia; School of Human Sciences, The University of Western Australia Crawley, WA 6009, Australia.
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27
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Clemons TD, Singh R, Sorolla A, Chaudhari N, Hubbard A, Iyer KS. Distinction Between Active and Passive Targeting of Nanoparticles Dictate Their Overall Therapeutic Efficacy. Langmuir 2018; 34:15343-15349. [PMID: 30441895 DOI: 10.1021/acs.langmuir.8b02946] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The role of nanoparticles in cancer medicine is vast with debate still surrounding the distinction between therapeutic efficacy of actively targeted nanoparticles versus passively targeted systems for drug delivery. While it is commonly accepted that methodologies that result in homing a high concentration of drug loaded nanoparticles to the tumor is beneficial, the role of intracellular trafficking of these nanoparticles in dictating the overall therapeutic outcome remains unresolved. Herein we demonstrate that the therapeutic outcome of drug loaded nanoparticles is governed beyond simply enabling nanoparticle internalization in cells. Using two model polymeric nanoparticles, one decorated with the GE11 peptide for active targeting of the epidermal growth factor receptor (EGFR) and the other without, we demonstrate that EGFR mediated intracellular internalization results in an enhanced therapeutic effect compared to the nontargeted formulation. Our findings demonstrate that the intracellular destination of nanoparticles beyond its ability to internalize is an important parameter that has to be accounted for in the design of targeted drug delivery systems.
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Affiliation(s)
- Tristan D Clemons
- School of Molecular Sciences , University of Western Australia , 35 Stirling Highway , Crawley , Western Australia Australia , 6009
| | - Ruhani Singh
- School of Molecular Sciences , University of Western Australia , 35 Stirling Highway , Crawley , Western Australia Australia , 6009
- CSIRO Manufacturing , New Horizons Centre , 20 Research Way , Clayton , Victoria Australia 3168
| | - Anabel Sorolla
- Harry Perkins Institute of Medical Research , 6 Verdun Street , Nedlands , Western Australia Australia 6009
| | - Nutan Chaudhari
- School of Molecular Sciences , University of Western Australia , 35 Stirling Highway , Crawley , Western Australia Australia , 6009
| | - Alysia Hubbard
- Centre for Microscopy, Characterisation and Analysis , University of Western Australia , 35 Stirling Highway , Crawley , Western Australia Australia , 6009
| | - K Swaminatha Iyer
- School of Molecular Sciences , University of Western Australia , 35 Stirling Highway , Crawley , Western Australia Australia , 6009
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28
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Ho D, Kretzmann JA, Norret M, Toshniwal P, Veder JP, Jiang H, Guagliardo P, Munshi AM, Chawla R, Evans CW, Clemons TD, Nguyen M, Kretzmann AL, Blythe AJ, Saunders M, Archer M, Fitzgerald M, Keelan JA, Bond CS, Kilburn MR, Hurley LH, Smith NM, Iyer KS. Intracellular speciation of gold nanorods alters the conformational dynamics of genomic DNA. Nat Nanotechnol 2018; 13:1148-1153. [PMID: 30297819 DOI: 10.1038/s41565-018-0272-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 09/03/2018] [Indexed: 05/10/2023]
Abstract
Gold nanorods are one of the most widely explored inorganic materials in nanomedicine for diagnostics, therapeutics and sensing1. It has been shown that gold nanorods are not cytotoxic and localize within cytoplasmic vesicles following endocytosis, with no nuclear localization2,3, but other studies have reported alterations in gene expression profiles in cells following exposure to gold nanorods, via unknown mechanisms4. In this work we describe a pathway that can contribute to this phenomenon. By mapping the intracellular chemical speciation process of gold nanorods, we show that the commonly used Au-thiol conjugation, which is important for maintaining the noble (inert) properties of gold nanostructures, is altered following endocytosis, resulting in the formation of Au(I)-thiolates that localize in the nucleus5. Furthermore, we show that nuclear localization of the gold species perturbs the dynamic microenvironment within the nucleus and triggers alteration of gene expression in human cells. We demonstrate this using quantitative visualization of ubiquitous DNA G-quadruplex structures, which are sensitive to ionic imbalances, as an indicator of the formation of structural alterations in genomic DNA.
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Affiliation(s)
- Diwei Ho
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Jessica A Kretzmann
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Marck Norret
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Priyanka Toshniwal
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Jean-Pierre Veder
- John de Laeter Centre, Curtin University, Perth, Western Australia, Australia
| | - Haibo Jiang
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Paul Guagliardo
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Alaa M Munshi
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Reena Chawla
- College of Pharmacy, University of Arizona, Tucson, AZ, USA
- BIO5 Institute, University of Arizona, Tucson, AZ, USA
- Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Cameron W Evans
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Tristan D Clemons
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Michelle Nguyen
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Amy L Kretzmann
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Amanda J Blythe
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Martin Saunders
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Michael Archer
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Melinda Fitzgerald
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
- Perron Institute for Neurological and Translational Science, Sarich Neuroscience Research Institute, Perth, Western Australia, Australia
| | - Jeffrey A Keelan
- Schools of Obstetrics & Gynaecology and Biomedical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Charles S Bond
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Matt R Kilburn
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Laurence H Hurley
- College of Pharmacy, University of Arizona, Tucson, AZ, USA
- BIO5 Institute, University of Arizona, Tucson, AZ, USA
- Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Nicole M Smith
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia.
| | - K Swaminathan Iyer
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia.
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Clemons TD, Bucat RB, Spagnoli D. First Year Introductory Chemistry at the University of Western Australia: Reflections and Perceptions. Aust J Chem 2018. [DOI: 10.1071/ch17359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study investigated two student cohorts enrolled in an introductory tertiary chemistry unit designed for students with little or no previous education in chemistry. Emeritus Professor Graham Chandler was instrumental in the design and development of this unit almost 30 years ago. Therefore, this study has particular interest in this special issue of the Australian Journal of Chemistry, which celebrates Emeritus Professor Graham Chandler’s contribution to Australian chemistry. This paper is divided into two distinct parts that provide two unique perspectives of the unit. The first perspective, Part A, is a historical account of the origins of this unit and is based on an interview with E/Prof. Chandler and Dr Peter Simpson OAM. Both E/Prof. Chandler and Dr Simpson provide an excellent reflection on the need for an introductory chemistry unit in tertiary education, which was not as common then as it is in the present day. The second perspective, Part B, is a research study focussing on the perceptions of students taking this unit in 2013 and 2014. In this study, it was found that the number of students who perceived chemistry to be applicable to real world problems increased during the unit, as did the number of students who enjoyed the unit. However, many students, most of whom did not intend to study chemistry further, did not recognise the application of the content to their future careers. There are many similarities between the aims of E/Prof. Chandler and Dr Simpson for the unit and the perceptions of students taking this unit 30 years later, which is testament to Graham’s contribution to chemistry education at the University of Western Australia.
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Brown H, Dawson B, Binnie MJ, Pinnington H, Sim M, Clemons TD, Peeling P. Sand training: Exercise-induced muscle damage and inflammatory responses to matched-intensity exercise. Eur J Sport Sci 2017; 17:741-747. [DOI: 10.1080/17461391.2017.1304998] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Henry Brown
- Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Brian Dawson
- Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Martyn J. Binnie
- Western Australian Institute of Sport, Mt Claremont, Western Australia, Australia
| | - Hugh Pinnington
- Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Marc Sim
- Western Australian Institute of Sport, Mt Claremont, Western Australia, Australia
- School of Health Science and Psychology, Federation University, Mt Helen, Victoria, Australia
| | - Tristan D. Clemons
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, Western Australia, Australia
| | - Peter Peeling
- Sport Science, Exercise and Health, School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia
- Western Australian Institute of Sport, Mt Claremont, Western Australia, Australia
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Clemons TD, Challenor M, Fitzgerald M, Dunlop SA, Smith NM, Iyer KS. Manipulating Cellular Interactions of Poly(glycidyl methacrylate) Nanoparticles Using Mixed Polymer Brushes. ACS Macro Lett 2016; 5:1132-1136. [PMID: 35658171 DOI: 10.1021/acsmacrolett.6b00613] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is a growing need for the development of nanoparticles, with imaging and drug delivery capabilities, to maintain cellular uptake but avoid protein attachment and recognition. In this study we have demonstrated that nanoparticles consisting of a poly(glycidyl methacrylate) (PGMA) core and a mixed brush architecture of methoxypoly(ethylene glycol) and poly(ethylenimine) (mPEG-PEI) on the surface can meet this need. Surface functionalization with PEI alone results in cellular uptake, but rapid protein attachment whereas PEG alone can avoid protein attachment but to the detriment of cellular uptake. A mixed copolymer brush of both PEI and mPEG provides the ideal balance.
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Affiliation(s)
- Tristan D. Clemons
- School of Chemistry and Biochemistry and ‡Experimental and Regenerative Neurosciences,
School of Animal Biology, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
| | - Michael Challenor
- School of Chemistry and Biochemistry and ‡Experimental and Regenerative Neurosciences,
School of Animal Biology, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
| | - Melinda Fitzgerald
- School of Chemistry and Biochemistry and ‡Experimental and Regenerative Neurosciences,
School of Animal Biology, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
| | - Sarah A. Dunlop
- School of Chemistry and Biochemistry and ‡Experimental and Regenerative Neurosciences,
School of Animal Biology, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
| | - Nicole M. Smith
- School of Chemistry and Biochemistry and ‡Experimental and Regenerative Neurosciences,
School of Animal Biology, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
| | - K. Swaminathan Iyer
- School of Chemistry and Biochemistry and ‡Experimental and Regenerative Neurosciences,
School of Animal Biology, The University of Western Australia, 35 Stirling Hwy, Crawley, Western Australia 6009, Australia
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Agarwal V, Toshniwal P, Smith NE, Smith NM, Li B, Clemons TD, Byrne LT, Kakulas F, Wood FM, Fear M, Corry B, Swaminathan Iyer K. Enhancing the efficacy of cation-independent mannose 6-phosphate receptor inhibitors by intracellular delivery. Chem Commun (Camb) 2016; 52:327-30. [DOI: 10.1039/c5cc06826f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Intracellular delivery of M6P/IGFII receptor inhibitors exhibits better efficacy than extracellular inhibitors to regulate TGFβ1 mediated upregulation of profibrotic marker, collagen I.
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Li B, Clemons TD, Agarwal V, Kretzmann J, Bradshaw M, Toshniwal P, Smith NM, Li S, Fear M, Wood FM, Swaminathan Iyer K. Regulation of collagen expression using nanoparticle mediated inhibition of TGF-β activation. NEW J CHEM 2016. [DOI: 10.1039/c5nj03115j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Polymeric nanoparticle for delivery of an effective anti-fibrotic agent in an in vitro model of scarring.
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Caulfield S, McDonald KA, Dawson B, Stearne SM, Green BA, Rubenson J, Clemons TD, Peeling P. A comparison of haemolytic responses in fore-foot and rear-foot distance runners. J Sports Sci 2015; 34:1485-90. [PMID: 26618486 DOI: 10.1080/02640414.2015.1119300] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 10/22/2022]
Abstract
This study examined the haemolytic effects of an interval-based running task in fore-foot and rear-foot striking runners. Nineteen male distance runners (10 fore-foot, 9 rear-foot) completed 8 × 3 min repeats at 90% vVO2peak on a motorised treadmill. Pre- and post-exercise venous blood samples were analysed for serum haptoglobin to quantify the haemolytic response to running. Vertical ground reaction forces were also captured via a force plate beneath the treadmill belt. Haptoglobin levels were significantly decreased following exercise (P = 0.001) in both groups (but not between groups), suggesting that the running task created a haemolytic stress. The ground reaction force data showed strong effect sizes for a greater peak force (d = 1.20) and impulse (d = 1.37) in fore-foot runners, and a greater rate of force development (d = 2.74) in rear-foot runners. The lack of difference in haptoglobin response between groups may be explained by the trend for fore-foot runners to experience greater peak force and impulse during the stance phase of their running gait, potentially negating any impact of the greater rate of force development occurring from the rear-foot runners' heel strike. Neither type of runner (fore-foot or rear-foot) appears more susceptible to technique-related foot-strike haemolysis.
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Affiliation(s)
- Stuart Caulfield
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia
| | - Kirsty A McDonald
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia
| | - Brian Dawson
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia
| | - Sarah M Stearne
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia
| | - Ben A Green
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia
| | - Jonas Rubenson
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia.,b Biomechanics Laboratory, Department of Kinesiology , Pennsylvania State University , University Park , PA , USA
| | - Tristan D Clemons
- c School of Chemistry and Biochemistry , The University of Western Australia , Crawley , Australia
| | - Peter Peeling
- a School of Sport Science, Exercise and Health , The University of Western Australia , Crawley , Australia
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Bradshaw M, Clemons TD, Ho D, Gutiérrez L, Lázaro FJ, House MJ, St Pierre TG, Fear MW, Wood FM, Iyer KS. Manipulating directional cell motility using intracellular superparamagnetic nanoparticles. Nanoscale 2015; 7:4884-4889. [PMID: 25695187 DOI: 10.1039/c4nr06594h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study investigated the ability for magnetic nanoparticles to influence cellular migration in the presence of an external magnetic field. We found that the direction of migrating keratinocytes can be controlled and the migration speed of fibroblasts can be increased with the internalisation of these nanoparticles in the presence of a magnetic field. The possibility of shepherding cells towards a region of interest through the use of internalized nanoparticles is an attractive prospect for cell tracking, cell therapies, and tissue engineering applications.
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Affiliation(s)
- Michael Bradshaw
- School of Chemistry and Biochemistry, M313, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
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Tangudu NK, Verma VK, Clemons TD, Beevi SS, Hay T, Mahidhara G, Raja M, Nair RA, Alexander LE, Patel AB, Jose J, Smith NM, Zdyrko B, Bourdoncle A, Luzinov I, Iyer KS, Clarke AR, Dinesh Kumar L. RNA Interference Using c-Myc-Conjugated Nanoparticles Suppresses Breast and Colorectal Cancer Models. Mol Cancer Ther 2015; 14:1259-69. [PMID: 25695957 DOI: 10.1158/1535-7163.mct-14-0970] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 02/10/2015] [Indexed: 01/05/2023]
Abstract
In this article, we report the development and preclinical validation of combinatorial therapy for treatment of cancers using RNA interference (RNAi). RNAi technology is an attractive approach to silence genes responsible for disease onset and progression. Currently, the critical challenge facing the clinical success of RNAi technology is in the difficulty of delivery of RNAi inducers, due to low transfection efficiency, difficulties of integration into host DNA and unstable expression. Using the macromolecule polyglycidal methacrylate (PGMA) as a platform to graft multiple polyethyleneimine (PEI) chains, we demonstrate effective delivery of small oligos (anti-miRs and mimics) and larger DNAs (encoding shRNAs) in a wide variety of cancer cell lines by successful silencing/activation of their respective target genes. Furthermore, the effectiveness of this therapy was validated for in vivo tumor suppression using two transgenic mouse models; first, tumor growth arrest and increased animal survival was seen in mice bearing Brca2/p53-mutant mammary tumors following daily intratumoral treatment with nanoparticles conjugated to c-Myc shRNA. Second, oral delivery of the conjugate to an Apc-deficient crypt progenitor colon cancer model increased animal survival and returned intestinal tissue to a non-wnt-deregulated state. This study demonstrates, through careful design of nonviral nanoparticles and appropriate selection of therapeutic gene targets, that RNAi technology can be made an affordable and amenable therapy for cancer.
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Affiliation(s)
- Naveen K Tangudu
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India
| | - Vinod K Verma
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India
| | - Tristan D Clemons
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, Australia
| | - Syed S Beevi
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India
| | - Trevor Hay
- European Cancer Stem Cell Research Institute, Cardiff University, Cathays, Cardiff, United Kingdom
| | - Ganesh Mahidhara
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India
| | - Meera Raja
- European Cancer Stem Cell Research Institute, Cardiff University, Cathays, Cardiff, United Kingdom
| | - Rekha A Nair
- Department of Pathology, Regional Cancer Centre, Trivandrum, India
| | - Liza E Alexander
- Department of Pathology, Regional Cancer Centre, Trivandrum, India
| | - Anant B Patel
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India
| | - Jedy Jose
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India
| | - Nicole M Smith
- Univ de Bordeaux, INSERM U869, IECB, ARNA Laboratory, Pessac, France
| | - Bogdan Zdyrko
- School of Materials Science and Engineering, Clemson University, Clemson, South Carolina
| | - Anne Bourdoncle
- Univ de Bordeaux, INSERM U869, IECB, ARNA Laboratory, Pessac, France
| | - Igor Luzinov
- School of Materials Science and Engineering, Clemson University, Clemson, South Carolina
| | - K Swaminathan Iyer
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, Australia.
| | - Alan R Clarke
- European Cancer Stem Cell Research Institute, Cardiff University, Cathays, Cardiff, United Kingdom.
| | - Lekha Dinesh Kumar
- Cancer Biology, Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, India.
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Hardy N, Viola HM, Johnstone VPA, Clemons TD, Cserne Szappanos H, Singh R, Smith NM, Iyer KS, Hool LC. Nanoparticle-mediated dual delivery of an antioxidant and a peptide against the L-Type Ca2+ channel enables simultaneous reduction of cardiac ischemia-reperfusion injury. ACS Nano 2015; 9:279-289. [PMID: 25493575 DOI: 10.1021/nn5061404] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Increased reactive oxygen species (ROS) production and elevated intracellular Ca(2+) following cardiac ischemia-reperfusion injury are key mediators of cell death and the development of cardiac hypertrophy. The L-type Ca(2+) channel is the main route for calcium influx in cardiac myocytes. Activation of the L-type Ca(2+) channel leads to a further increase in mitochondrial ROS production and metabolism. We have previously shown that the application of a peptide derived against the alpha-interacting domain of the L-type Ca(2+) channel (AID) decreases myocardial injury post reperfusion. Herein, we examine the efficacy of simultaneous delivery of the AID peptide in combination with the potent antioxidants curcumin or resveratrol using multifunctional poly(glycidyl methacrylate) (PGMA) nanoparticles. We highlight that drug loading and dissolution are important parameters that have to be taken into account when designing novel combinatorial therapies following cardiac ischemia-reperfusion injury. In the case of resveratrol low loading capacity and fast release rates hinder its applicability as an effective candidate for simultaneous therapy. However, in the case of curcumin, high loading capacity and sustained release rates enable its effective simultaneous delivery in combination with the AID peptide. Simultaneous delivery of the AID peptide with curcumin allowed for effective attenuation of the L-type Ca(2+) channel-activated increases in superoxide (assessed as changes in DHE fluorescence; Empty NP = 53.1 ± 7.6%; NP-C-AID = 7.32 ± 3.57%) and mitochondrial membrane potential (assessed as changes in JC-1 fluorescence; Empty NP = 19.8 ± 2.8%; NP-C-AID=13.05 ± 1.78%). We demonstrate in isolated rat hearts exposed to ischemia followed by reperfusion, that curcumin and the AID peptide in combination effectively reduce muscle damage, decrease oxidative stress and superoxide production in cardiac myocytes.
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Affiliation(s)
- Naviin Hardy
- School of Anatomy, Physiology and Human Biology, The University of Western Australia , Crawley, Western Australia 6009, Australia
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Clemons TD, Viola HM, House MJ, Iyer KS, Hool LC. Examining efficacy of "TAT-less" delivery of a peptide against the L-type calcium channel in cardiac ischemia-reperfusion injury. ACS Nano 2013; 7:2212-2220. [PMID: 23432114 DOI: 10.1021/nn305211f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Increased calcium influx through the L-type Ca(2+) channel or overexpression of the alpha subunit of the channel induces cardiac hypertrophy. Cardiac hypertrophy results from increased oxidative stress and alterations in cell calcium levels following ischemia-reperfusion injury and is an independent risk factor for increased morbidity and mortality. We find that decreasing the movement of the auxiliary beta subunit with a peptide derived against the alpha-interacting domain (AID) of the channel attenuates ischemia-reperfusion injury. We compared the efficacy of delivering the AID peptide using a trans-activator of transcription (TAT) sequence with that of the peptide complexed to multifunctional polymeric nanoparticles. The AID-tethered nanoparticles perfused through the myocardium more diffusely and associated with cardiac myocytes more rapidly than the TAT-labeled peptide but had similar effects on intracellular calcium levels. The AID-complexed nanoparticles resulted in a similar reduction in release of creatine kinase and lactate dehydrogenase after ischemia-reperfusion to the TAT-labeled peptide. Since nanoparticle delivery also holds the potential for dual drug delivery, we conclude that AID-complexed nanoparticles may provide an effective platform for peptide delivery in cardiac ischemia-reperfusion injuries.
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Affiliation(s)
- Tristan D Clemons
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, WA 6009, Australia
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Clemons TD, Fitzgerald M, Dunlop SA, Harvey AR, Iyer KS, Stubbs KA. An improved assay for the spectrophotometric determination of chondroitinase ABC activity. NEW J CHEM 2013. [DOI: 10.1039/c3nj00168g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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40
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Harrison J, Bartlett CA, Cowin G, Nicholls PK, Evans CW, Clemons TD, Zdyrko B, Luzinov IA, Harvey AR, Iyer KS, Dunlop SA, Fitzgerald M. In vivo imaging and biodistribution of multimodal polymeric nanoparticles delivered to the optic nerve. Small 2012; 8:1579-1589. [PMID: 22411702 DOI: 10.1002/smll.201102648] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Indexed: 05/31/2023]
Abstract
The use of nanoparticles for targeted delivery of therapeutic agents to sites of injury or disease in the central nervous system (CNS) holds great promise. However, the biodistribution of nanoparticles following in vivo administration is often unknown, and concerns have been raised regarding potential toxicity. Using poly(glycidyl methacrylate) (PGMA) nanoparticles coated with polyethylenimine (PEI) and containing superparamagnetic iron oxide nanoparticles as a magnetic resonance imaging (MRI) contrast agent and rhodamine B as a fluorophore, whole animal MRI and fluorescence analyses are used to demonstrate that these nanoparticles (NP) remain close to the site of injection into a partial injury of the optic nerve, a CNS white matter tract. In addition, some of these NP enter axons and are transported to parent neuronal somata. NP also remain in the eye following intravitreal injection, a non-injury model. Considerable infiltration of activated microglia/macrophages occurs in both models. Using magnetic concentration and fluorescence visualization of tissue homogenates, no dissemination of the NP into peripheral tissues is observed. Histopathological analysis reveals no toxicity in organs other than at the injection sites. Multifunctional nanoparticles may be a useful mechanism to deliver therapeutic agents to the injury site and somata of injured CNS neurons and thus may be of therapeutic value following brain or spinal cord trauma.
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Affiliation(s)
- James Harrison
- Centre for Strategic Nanofabrication, School of Chemistry and Biochemistry, The University of Western Australia, Crawley, WA 6009, Australia
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41
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Evans CW, Latter MJ, Ho D, Peerzade SAMA, Clemons TD, Fitzgerald M, Dunlop SA, Iyer KS. Multimodal and multifunctional stealth polymer nanospheres for sustained drug delivery. NEW J CHEM 2012. [DOI: 10.1039/c2nj40016b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Evans CW, Fitzgerald M, Clemons TD, House MJ, Padman BS, Shaw JA, Saunders M, Harvey AR, Zdyrko B, Luzinov I, Silva GA, Dunlop SA, Iyer KS. Multimodal analysis of PEI-mediated endocytosis of nanoparticles in neural cells. ACS Nano 2011; 5:8640-8648. [PMID: 22003894 DOI: 10.1021/nn2022149] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polymer nanoparticles are widely used as a highly generalizable tool to entrap a range of different drugs for controlled or site-specific release. However, despite numerous studies examining the kinetics of controlled release, the biological behavior of such nanoparticles remains poorly understood, particularly with respect to endocytosis and intracellular trafficking. We synthesized polyethylenimine-decorated polymer nanospheres (ca. 100-250 nm) of the type commonly used for drug release and used correlated electron microscopy, fluorescence spectroscopy and microscopy, and relaxometry to track endocytosis in neural cells. These capabilities provide insight into how polyethylenimine mediates the entry of nanoparticles into neural cells and show that polymer nanosphere uptake involves three distinct steps, namely, plasma membrane attachment, fluid-phase as well as clathrin- and caveolin-independent endocytosis, and progressive accumulation in membrane-bound intracellular vesicles. These findings provide detailed insight into how the intracellular delivery of nanoparticles is mediated by polyethylenimine, which is presently the most commonly used nonviral gene transfer agent. This fundamental knowledge may also assist in the preparation of next-generation nonviral vectors.
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Affiliation(s)
- Cameron W Evans
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia
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Clemons TD, Evans CW, Zdyrko B, Luzinov I, Fitzgerald M, Dunlop SA, Harvey AR, Iyer KS, Stubbs KA. Multifunctional nanoadditives for the thermodynamic and kinetic stabilization of enzymes. Nanoscale 2011; 3:4085-4087. [PMID: 21897968 DOI: 10.1039/c1nr10786k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Stabilization of enzymes has become a major focus in the quest to improve the activity, sustainability and recyclability of enzymes for their successful integration into both industry and medicine. Here, we describe the kinetic and thermodynamic stabilization of a variety of enzymes in the presence of cationic multifunctional polymeric nanoparticles.
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Affiliation(s)
- Tristan D Clemons
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, Crawley, WA 6009, Australia
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