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Gong C, Yang X, Tang SJ, Zhang QQ, Wang Y, Liu YL, Chen YC, Peng GD, Fan X, Xiao YF, Rao YJ, Gong Y. Submonolayer biolasers for ultrasensitive biomarker detection. LIGHT, SCIENCE & APPLICATIONS 2023; 12:292. [PMID: 38052775 DOI: 10.1038/s41377-023-01335-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 10/18/2023] [Accepted: 11/12/2023] [Indexed: 12/07/2023]
Abstract
Biomarker detection is key to identifying health risks. However, designing sensitive and single-use biosensors for early diagnosis remains a major challenge. Here, we report submonolayer lasers on optical fibers as ultrasensitive and disposable biosensors. Telecom optical fibers serve as distributed optical microcavities with high Q-factor, great repeatability, and ultralow cost, which enables whispering-gallery laser emission to detect biomarkers. It is found that the sensing performance strongly depends on the number of gain molecules. The submonolayer lasers obtained a six-order-of-magnitude improvement in the lower limit of detection (LOD) when compared to saturated monolayer lasers. We further achieve an ultrasensitive immunoassay for a Parkinson's disease biomarker, alpha-synuclein (α-syn), with a lower LOD of 0.32 pM in serum, which is three orders of magnitude lower than the α-syn concentration in the serum of Parkinson's disease patients. Our demonstration of submonolayer biolaser offers great potentials in high-throughput clinical diagnosis with ultimate sensitivity.
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Affiliation(s)
- Chaoyang Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
- Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education of China), School of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Xi Yang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Shui-Jing Tang
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Qian-Qian Zhang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
| | - Yanqiong Wang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
| | - Yi-Ling Liu
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
| | - Yu-Cheng Chen
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Gang-Ding Peng
- School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Xudong Fan
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Yun-Feng Xiao
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China.
| | - Yun-Jiang Rao
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China.
- Research Centre for Optical Fiber Sensing, Zhejiang Laboratory, Hangzhou, Zhejiang, 310000, China.
| | - Yuan Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China.
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Chung MC, Liu YQ, Jian BL, Xu SQ, Syu JJ, Lee CF, Tan KT. Affinity-Switchable Interaction of Biotin and Streptavidin for the Signal-ON Detection of Small Molecules. ACS Sens 2023; 8:4226-4232. [PMID: 37871282 DOI: 10.1021/acssensors.3c01572] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Lateral flow assay (LFA) based on gold nanoparticles (AuNPs) is a widely used analytical device for the rapid analysis of environmental hazards and biomarkers. Typically, a sandwich-type format is used for macromolecule detection, in which the appearance of a red test line indicates a positive result (Signal-ON). In contrast, small molecule detection usually relies on a competitive assay, where the absence of a test line indicates positive testing (Signal-OFF). However, such a "Signal-OFF" reading is usually detected within a narrower dynamic range and tends to generate false-negative signals at a low concentration. Moreover, inconsistent readings between macromolecule and small molecule testing might lead to misinterpretation when used by nonskilled individuals. Herein, we report a "Signal-ON" small molecule competitive assay based on the sterically modulated affinity-switchable interaction of biotin and streptavidin. In the absence of a small molecule target, a large steric hindrance can be imposed on the biotin to prevent interaction with streptavidin. However, in the presence of the small molecule target, this steric effect is removed, allowing the biotin to bind to streptavidin and generate the desired test line. In this article, we demonstrate the selective detection of two small molecule drugs, sulfonamides and trimethoprim, using this simple and modular affinity-switchable lateral flow assay (ASLFA). We believe that this affinity-switchable approach can also be adapted in drug discovery and clinical diagnosis, where the competitive assay format is always used for the rapid analysis of small molecules.
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Affiliation(s)
- Min-Chi Chung
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu, Taiwan 300044, Republic of China
| | - Yun-Qiao Liu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu, Taiwan 300044, Republic of China
| | - Bo-Lin Jian
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu, Taiwan 300044, Republic of China
| | - Shun-Qiang Xu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu, Taiwan 300044, Republic of China
| | - Jhih-Jie Syu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu, Taiwan 300044, Republic of China
| | - Chin-Fa Lee
- Department of Chemistry, National Chung Hsing University, Taichung ,Taiwan 402202, Republic of China
| | - Kui-Thong Tan
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang-Fu Road, Hsinchu, Taiwan 300044, Republic of China
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung ,Taiwan 80708, Republic of China
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Qiu L, Han X, Xing C, Glebe U. Polymerization-Induced Self-Assembly: An Emerging Tool for Generating Polymer-Based Biohybrid Nanostructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207457. [PMID: 36737834 DOI: 10.1002/smll.202207457] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/04/2023] [Indexed: 05/04/2023]
Abstract
The combination of biomolecules and synthetic polymers provides an easy access to utilize advantages from both the synthetic world and nature. This is not only important for the development of novel innovative materials, but also promotes the application of biomolecules in various fields including medicine, catalysis, and water treatment, etc. Due to the rapid progress in synthesis strategies for polymer nanomaterials and deepened understanding of biomolecules' structures and functions, the construction of advanced polymer-based biohybrid nanostructures (PBBNs) becomes prospective and attainable. Polymerization-induced self-assembly (PISA), as an efficient and versatile technique in obtaining polymeric nano-objects at high concentrations, has demonstrated to be an attractive alternative to existing self-assembly procedures. Those advantages induce the focus on the fabrication of PBBNs via the PISA technique. In this review, current preparation strategies are illustrated based on the PISA technique for achieving various PBBNs, including grafting-from and grafting-through methods, as well as encapsulation of biomolecules during and subsequent to the PISA process. Finally, advantages and drawbacks are discussed in the fabrication of PBBNs via the PISA technique and obstacles are identified that need to be overcome to enable commercial application.
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Affiliation(s)
- Liang Qiu
- Key Laboratory of Hebei Province for Molecular Biophysics, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300401, P. R. China
- Institute of Biophysics, School of Science, Hebei University of Technology, Tianjin, 300401, P. R. China
| | - Xinyue Han
- Institute of Biophysics, School of Science, Hebei University of Technology, Tianjin, 300401, P. R. China
| | - Chengfen Xing
- Key Laboratory of Hebei Province for Molecular Biophysics, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300401, P. R. China
| | - Ulrich Glebe
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam-Golm, Germany
- Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476, Potsdam-Golm, Germany
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Heredero M, Beloqui A. Enzyme-Polymer Conjugates for Tuning, Enhancing, and Expanding Biocatalytic Activity. Chembiochem 2023; 24:e202200611. [PMID: 36507915 DOI: 10.1002/cbic.202200611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/11/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
Combining polymers with functional proteins is an approach that has brought several successful stories in the field of biomedicine with PEGylated therapeutic proteins. The latest advances in polymer chemistry have facilitated the expansion of protein-polymer hybrids to other research areas such as biocatalysis. Polymers can impart stability and novel functionalities to the enzyme of interest, thereby improving the catalytic performance of a given reaction. In this review, we have revisited the main methodologies currently used for the synthesis of enzyme-polymer hybrids, unveiling the interplay between the configuration and the composition of the assembled structure and the eventual traits of the hybrid. Finally, the latest advances, such as the assembly of polymer-based chemoenzymatic nanoreactors and the use of deep learning methodologies to achieve the most suitable polymer compositions for catalysis, are discussed.
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Affiliation(s)
- Marcos Heredero
- POLYMAT and Department of Applied Chemistry, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel Lardizabal 3, 20018, Donostia-San Sebastián, Spain
| | - Ana Beloqui
- POLYMAT and Department of Applied Chemistry, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel Lardizabal 3, 20018, Donostia-San Sebastián, Spain.,IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009, Bilbao, Spain
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5
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Wu CC, Huang SJ, Fu TY, Lin FL, Wang XY, Tan KT. Small-Molecule Modulated Affinity-Tunable Semisynthetic Protein Switches. ACS Sens 2022; 7:2691-2700. [PMID: 36084142 DOI: 10.1021/acssensors.2c01211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Engineered protein switches have been widely applied in cell-based protein sensors and point-of-care diagnosis for the rapid and simple analysis of a wide variety of proteins, metabolites, nucleic acids, and enzymatic activities. Currently, these protein switches are based on two main types of switching mechanisms to transduce the target binding event to a quantitative signal, through a change in the optical properties of fluorescent molecules and the activation of enzymatic activities. In this paper, we introduce a new affinity-tunable protein switch strategy in which the binding of a small-molecule target with the protein activates the streptavidin-biotin interaction to generate a readout signal. In the absence of a target, the biotinylated protein switch forms a closed conformation where the biotin is positioned in close proximity to the protein, imposing a large steric hindrance to prevent the effective binding with streptavidin. In the presence of the target molecule, this steric hindrance is removed, thereby exposing the biotin for streptavidin binding to produce strong fluorescent signals. With this modular sensing concept, various sulfonamide, methotrexate, and trimethoprim drugs can be selectively detected on the cell surface of native and genetically engineered cells using different fluorescent dyes and detection techniques.
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Affiliation(s)
- Chien-Chi Wu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Shao-Jie Huang
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Tsung-Yu Fu
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Fang-Ling Lin
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Xin-You Wang
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China
| | - Kui-Thong Tan
- Department of Chemistry, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China.,Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu 30013, Taiwan, Republic of China.,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China
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6
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Kiran P, Khan A, Neekhra S, Pallod S, Srivastava R. Nanohybrids as Protein-Polymer Conjugate Multimodal Therapeutics. FRONTIERS IN MEDICAL TECHNOLOGY 2021; 3:676025. [PMID: 35047929 PMCID: PMC8757875 DOI: 10.3389/fmedt.2021.676025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 05/21/2021] [Indexed: 12/12/2022] Open
Abstract
Protein therapeutic formulations are being widely explored as multifunctional nanotherapeutics. Challenges in ensuring susceptibility and efficacy of nanoformulation still prevail owing to various interactions with biological fluids before reaching the target site. Smart polymers with the capability of masking drugs, ease of chemical modification, and multi-stimuli responsiveness can assist controlled delivery. An active moiety like therapeutic protein has started to be known as an important biological formulation with a diverse medicinal prospect. The delivery of proteins and peptides with high target specificity has however been tedious, due to their tendency to aggregate formation in different environmental conditions. Proteins due to high chemical reactivity and poor bioavailability are being researched widely in the field of nanomedicine. Clinically, multiple nano-based formulations have been explored for delivering protein with different carrier systems. A biocompatible and non-toxic polymer-based delivery system serves to tailor the polymer or drug better. Polymers not only aid delivery to the target site but are also responsible for proper stearic orientation of proteins thus protecting them from internal hindrances. Polymers have been shown to conjugate with proteins through covalent linkage rendering stability and enhancing therapeutic efficacy prominently when dealing with the systemic route. Here, we present the recent developments in polymer-protein/drug-linked systems. We aim to address questions by assessing the properties of the conjugate system and optimized delivery approaches. Since thorough characterization is the key aspect for technology to enter into the market, correlating laboratory research with commercially available formulations will also be presented in this review. By examining characteristics including morphology, surface properties, and functionalization, we will expand different hybrid applications from a biomaterial stance applied in in vivo complex biological conditions. Further, we explore understanding related to design criteria and strategies for polymer-protein smart nanomedicines with their potential prophylactic theranostic applications. Overall, we intend to highlight protein-drug delivery through multifunctional smart polymers.
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Affiliation(s)
- Pallavi Kiran
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Amreen Khan
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
- Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai, India
| | - Suditi Neekhra
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Shubham Pallod
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
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Rational Design of Biomolecules/Polymer Hybrids by Reversible Deactivation Radical Polymerization (RDRP) for Biomedical Applications. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2543-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Yang X, Gong C, Wang Y, Luo Y, Rao YJ, Peng GD, Gong Y. A sequentially bioconjugated optofluidic laser for wash-out-free and rapid biomolecular detection. LAB ON A CHIP 2021; 21:1686-1693. [PMID: 33949394 DOI: 10.1039/d0lc01332c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Microstructures can improve both sensitivity and assay time in heterogeneous assays (such as ELISA) for biochemical analysis; however, it remains a challenge to perform the essential wash process in those microstructure-based heterogeneous assays. Here, we propose a sequential bioconjugation protocol to solve this problem and demonstrate a new type of fiber optofluidic laser for biosensing. Except for acting as an optical microresonator and a microstructured substrate, the miniaturized hollow optical fiber (HOF) is used as a microfluidic channel for storing and transferring reagents thanks to its capability in length extension. Through the capillary action, different reagents were sequentially withdrawn into the fiber for specific binding and washing purposes. By using the sequentially bioconjugated FOFL, avidin molecules are detected based on competitive binding with a limit of detection of 9.5 pM, ranging from 10 pM to 100 nM. It is demonstrated that a short incubation time of 10 min is good enough to allow the biomolecules to conjugate on the inner surface of the HOF. Owing to its miniaturized size, only 589 nL of liquid is required for incubation, which reduces the sample consumption and cost for each test. This work provides a tool to exploit the potential of microstructured optical fibers in high-performance biosensing.
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Affiliation(s)
- Xi Yang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., Chengdu, 611731 China.
| | - Chaoyang Gong
- School of Electrical and Electronics Engineering, Nanyang Technological University, 50 Nanyang Ave, Singapore, 639798 Singapore
| | - Yanqiong Wang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., Chengdu, 611731 China.
| | - Yanhua Luo
- School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW 2052, Australia
| | - Yun-Jiang Rao
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., Chengdu, 611731 China. and Research Center for Optical Fiber Sensing, Zhejiang Laboratory, Hangzhou, Zhejiang 310000, China
| | - Gang-Ding Peng
- School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW 2052, Australia
| | - Yuan Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave., Chengdu, 611731 China.
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Brunato S, Mastrotto F, Bellato F, Garofalo M, Göddenhenrich T, Mantovani G, Alexander C, Gross S, Salmaso S, Caliceti P. Thermosensitive "Smart" Surfaces for Biorecognition Based Cell Adhesion and Controlled Detachment. Macromol Biosci 2020; 21:e2000277. [PMID: 33146950 DOI: 10.1002/mabi.202000277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/20/2020] [Indexed: 11/07/2022]
Abstract
The biorecognition-based control of attachment/detachment of MCF-7 cancer cells from polymer-coated surfaces is demonstrated. A glass surface is coated with a thermoresponsive statistical copolymer of poly(N-isopropylacrylamide-co-acrylamide) [p(NIPAm-co-Am)], which is end-capped with the Gly-Arg-Gly-Asp-Ser (GRGDS) peptide, and the hydrophilic polymer poly(ethylene glycol) (PEG). Below the lower critical solution temperature (LCST) of p(NIPAm-co-Am) (38 °C), the copolymers are in the extended conformation, allowing for accessibility of the GRGDS peptides to membrane-associated integrins thus enabling cell attachment. Above the LCST, the p(NIPAm-co-Am) polymers collapse into globular conformations, resulting in the shielding of the GRGDS peptides into the PEG brush with consequent inaccessibility to cell-surface integrins, causing cell detachment. The surface coating is carried out by a multi-step procedure that included: glass surface amination with 3-aminopropyltriethoxysilane; reaction of mPEG5kDa -N-hydroxysuccinimide (NHS) and p(NIPam-co-Am)15.1kDa -bis-NHS with the surface aminopropyl groups and conjugation of GRGDS to the carboxylic acid termini of p(NIPam-co-Am)15.1kDa -COOH. A range of spectrophotometric, surface, and microscopy assays confirmed the identity of the polymer-coated substrates. Competition studies prove that MCF-7 cancer cells are attached via peptide recognition at the coated surfaces according to the mPEG5kDa /p(NIPam-co-Am)15.1kDa -GRGDS molar ratio. These data suggest the system can be exploited to modulate cell integrin/GRGDS binding for controlled cell capture and release.
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Affiliation(s)
- Silvia Brunato
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Francesca Mastrotto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Federica Bellato
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Mariangela Garofalo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Thomas Göddenhenrich
- Institute of Physics, Giessen University, Heinrich-Buff-Ring 16, Giessen, 35392, Germany
| | - Giuseppe Mantovani
- Molecular Therapeutics and Formulation Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Cameron Alexander
- Molecular Therapeutics and Formulation Division, School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Silvia Gross
- Department of Chemical Sciences, University of Padova, via F. Marzolo 1, Padova, 35131, Italy
| | - Stefano Salmaso
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
| | - Paolo Caliceti
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via F. Marzolo 5, Padova, 35131, Italy
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Singh RS, Kaur N, Hassan M, Kennedy JF. Pullulan in biomedical research and development - A review. Int J Biol Macromol 2020; 166:694-706. [PMID: 33137388 DOI: 10.1016/j.ijbiomac.2020.10.227] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 10/28/2020] [Indexed: 12/14/2022]
Abstract
Pullulan is an imperative microbial exo-polymer commercially produced by yeast like fungus Aureobasidium pullulans. Its structure contains maltosyl repeating units which comprises two α-(1 → 4) linked glucopyranose rings attached to one glucopyranose ring through α-(1 → 6) glycosidic bond. The co-existence of α-(1 → 6) and α-(1 → 4) glycosidic linkages endows distinctive physico-chemical properties to pullulan. It is highly biocompatible, non-toxic and non-carcinogenic in nature. It is extremely resistant to any mutagenicity or immunogenicity. The unique properties of pullulan make it a potent candidate for biomedical applications viz. drug delivery, gene delivery, tissue engineering, molecular chaperon, plasma expander, vaccination, etc. This review highlights the potential of pullulan in biomedical research and development.
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Affiliation(s)
- Ram Sarup Singh
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India.
| | - Navpreet Kaur
- Carbohydrate and Protein Biotechnology Laboratory, Department of Biotechnology, Punjabi University, Patiala 147 002, Punjab, India
| | - Muhammad Hassan
- US-Pakistan Center for Advanced Studies in Energy, National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
| | - John F Kennedy
- Chembiotech Laboratories, Advanced Science and Technology Institute, 5 The Croft, Buntsford Drive, Stoke Heath, Bromsgrove, Worcs B60 4JE, UK
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Arno MC. Engineering the Mammalian Cell Surface with Synthetic Polymers: Strategies and Applications. Macromol Rapid Commun 2020; 41:e2000302. [DOI: 10.1002/marc.202000302] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/27/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Maria C. Arno
- School of Chemistry University of Birmingham Edgbaston Birmingham B15 2TT UK
- Institute of Cancer and Genomic Sciences University of Birmingham Edgbaston Birmingham B15 2TT UK
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13
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Rottke FO, Heyne MV, Reinicke S. Switching enzyme activity by a temperature responsive inhibitor modified polymer. Chem Commun (Camb) 2020; 56:2459-2462. [DOI: 10.1039/c9cc09385k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A thermoresponsive NIPAAm-based polymer is combined with the selective acetylcholinesterase inhibitor tacrine in order to create a strict in sense on/off switch for enzyme activity.
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Affiliation(s)
- Falko O. Rottke
- Fraunhofer Institute for Applied Polymer Research IAP
- 14476 Potsdam
- Germany
- Chair of Polymer Materials and Polymer Technologies
- University of Potsdam
| | | | - Stefan Reinicke
- Fraunhofer Institute for Applied Polymer Research IAP
- 14476 Potsdam
- Germany
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15
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Hoffman AS, Stayton PS. Applications of “Smart Polymers” as Biomaterials. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00016-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Covarrubias-Zambrano O, Yu J, Bossmann SH. Nano-Inspired Technologies for Peptide Delivery. Curr Protein Pept Sci 2019; 21:379-400. [PMID: 31793426 DOI: 10.2174/1389203720666191202112429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 08/26/2019] [Accepted: 10/02/2019] [Indexed: 12/15/2022]
Abstract
Nano-inspired technologies offer unique opportunities to treat numerous diseases by using therapeutic peptides. Therapeutic peptides have attractive pharmacological profiles and can be manufactured at relatively low costs. The major advantages of using a nanodelivery approach comprises significantly lower required dosages compared to systemic delivery, and thus reduced toxicity and immunogenicity. The combination of therapeutic peptides with delivery peptides and nanoparticles or small molecule drugs offers systemic treatment approaches, instead of aiming for single biological targets or pathways. This review article discusses exemplary state-of-the-art nanosized delivery systems for therapeutic peptides and antibodies, as well as their biochemical and biophysical foundations and emphasizes still remaining challenges. The competition between using different nanoplatforms, such as liposome-, hydrogel-, polymer-, silica nanosphere-, or nanosponge-based delivery systems is still "on" and no clear frontrunner has emerged to date.
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Affiliation(s)
| | - Jing Yu
- Department of Chemistry, Kansas State University, 419 CBC Building, Manhattan, KS 66506-0401, United States.,Johns Hopkins University, Department of Radiology, Baltimore, MD, United States
| | - Stefan H Bossmann
- Department of Chemistry, Kansas State University, 419 CBC Building, Manhattan, KS 66506-0401, United States
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17
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Kim D, Kwon SJ, Sauve J, Fraser K, Kemp L, Lee I, Nam J, Kim J, Dordick JS. Modular Assembly of Unique Chimeric Lytic Enzymes on a Protein Scaffold Possessing Anti-Staphylococcal Activity. Biomacromolecules 2019; 20:4035-4043. [PMID: 31524374 DOI: 10.1021/acs.biomac.9b01134] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Lytic enzymes have been considered as potential alternatives to antibiotics. These enzymes, particularly those that target Gram-positive bacteria, consist of modular cell wall-binding and catalytic domains, which can be shuffled with those of other lytic enzymes to produce unnatural chimeric enzymes. In this work, we report the in vitro shuffling of two different modular domains using a protein self-assembly methodology. Catalytic domains (CD) and cell wall-binding domains (BD) from the bacteriocin lysostaphin (Lst) and a putative autolysin from Staphylococcus aureus (SA1), respectively, were genetically site-specifically biotinylated and assembled with streptavidin to generate 23 permuted chimeras. The specific assembly of a CD (3 equiv) and a BD (1 equiv) from Lst and SA1, respectively [CDL-BDS (3:1)], on a streptavidin scaffold yielded high lytic activity against S. aureus (at least 5.6 log reduction), which was higher than that obtained with either native Lst or SA1 alone. Moreover, at 37 °C, the initial rate of cell lysis was over 3-fold higher than that with free Lst, thereby revealing the unique catalytic properties of the chimeric proteins. In vitro self-assembly of functional domains from modular lytic enzymes on a protein scaffold likely expands the repertoire of bactericidal enzymes with improved activities.
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Affiliation(s)
- Domyoung Kim
- Department of Chemical and Biological Engineering, and Center for Biotechnology & Interdisciplinary Studies , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Seok-Joon Kwon
- Department of Chemical and Biological Engineering, and Center for Biotechnology & Interdisciplinary Studies , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Jessica Sauve
- Department of Chemical and Biological Engineering, and Center for Biotechnology & Interdisciplinary Studies , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Keith Fraser
- Department of Chemical and Biological Engineering, and Center for Biotechnology & Interdisciplinary Studies , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Leighann Kemp
- Department of Chemical and Biological Engineering, and Center for Biotechnology & Interdisciplinary Studies , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
| | - Inseon Lee
- Department of Chemical and Biological Engineering , Korea University , 145 Anam-ro , Seongbuk-gu, Seoul 02841 , Republic of Korea
| | - Jahyun Nam
- Department of Chemical and Biological Engineering , Korea University , 145 Anam-ro , Seongbuk-gu, Seoul 02841 , Republic of Korea
| | - Jungbae Kim
- Department of Chemical and Biological Engineering , Korea University , 145 Anam-ro , Seongbuk-gu, Seoul 02841 , Republic of Korea
| | - Jonathan S Dordick
- Department of Chemical and Biological Engineering, and Center for Biotechnology & Interdisciplinary Studies , Rensselaer Polytechnic Institute , 110 8th Street , Troy , New York 12180 , United States
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18
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Singh K, Ejaz W, Dutta K, Thayumanavan S. Antibody Delivery for Intracellular Targets: Emergent Therapeutic Potential. Bioconjug Chem 2019; 30:1028-1041. [PMID: 30830750 PMCID: PMC6470022 DOI: 10.1021/acs.bioconjchem.9b00025] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Proteins have sparked fast growing interest as biological therapeutic agents for several diseases. Antibodies, in particular, carry an enormous potential as drugs owing to their remarkable target specificity and low immunogenicity. Although the market has numerous antibodies directed toward extracellular targets, their use in targeting therapeutically important intracellular targets is limited by their inability to cross cellular membrane. Realizing the potential for antibody therapy in disease treatment, progress has been made in the development of methods to deliver antibodies intracellularly. In this review, we address various platforms for delivery of antibodies and their merits and drawbacks.
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19
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Liu X, Sun J, Gao W. Site-selective protein modification with polymers for advanced biomedical applications. Biomaterials 2018; 178:413-434. [DOI: 10.1016/j.biomaterials.2018.04.050] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 04/21/2018] [Accepted: 04/24/2018] [Indexed: 12/12/2022]
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20
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21
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Abbina S, Siren EMJ, Moon H, Kizhakkedathu JN. Surface Engineering for Cell-Based Therapies: Techniques for Manipulating Mammalian Cell Surfaces. ACS Biomater Sci Eng 2017; 4:3658-3677. [DOI: 10.1021/acsbiomaterials.7b00514] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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22
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Singh RS, Kaur N, Rana V, Kennedy JF. Pullulan: A novel molecule for biomedical applications. Carbohydr Polym 2017; 171:102-121. [DOI: 10.1016/j.carbpol.2017.04.089] [Citation(s) in RCA: 165] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 04/26/2017] [Accepted: 04/26/2017] [Indexed: 01/09/2023]
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23
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Akhras S, Toda M, Boller K, Himmelsbach K, Elgner F, Biehl M, Scheurer S, Gratz M, Vieths S, Hildt E. Cell-permeable capsids as universal antigen carrier for the induction of an antigen-specific CD8 + T-cell response. Sci Rep 2017; 7:9630. [PMID: 28851900 PMCID: PMC5575276 DOI: 10.1038/s41598-017-08787-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 07/13/2017] [Indexed: 01/21/2023] Open
Abstract
Vaccine platforms that can be flexibly loaded with antigens can contribute to decrease response time to emerging infections. For many pathogens and chronic infections, induction of a robust cytotoxic T lymphocytes-mediated response is desirable to control infection. Antigen delivery into the cytoplasm of antigen presenting cells favors induction of cytotoxic T cells. By fusion of the cell-permeable translocation motif (TLM)-peptide to the capsid-forming core protein of hepatitis B virus, and by insertion of the strep-tag in the spike tip (a domain that protrudes from the surface of the capsid), cell-permeable carrier capsids were generated that can be flexibly loaded with various antigens. Loading with antigens was demonstrated by electron microscopy, density gradient centrifugation and surface plasmon resonance spectroscopy. Confocal immunofluorescence microscopy showed that cell-permeable carrier capsids mediate transfer of cargo antigen into the cytoplasm. Using cell-permeable carrier capsids loaded with ovalbumin as model antigen, activation of antigen presenting cells and ovalbumin-specific CD8+ T-cells, which correlates with enhanced specific killing activity, was found. This demonstrates the capacity of TLM-carrier-capsids to serve as universal antigen carrier to deliver antigens into the cytoplasm of antigen presenting cells, which leads to enhanced MHC class I-mediated presentation and induction of antigen-specific cytotoxic T lymphocytes response.
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Affiliation(s)
- Sami Akhras
- Department of Virology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Masako Toda
- Department of Allergology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Klaus Boller
- Department of Immunology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | | | - Fabian Elgner
- Department of Virology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Marlene Biehl
- Department of Virology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Stephan Scheurer
- Department of Allergology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Meike Gratz
- Department of Virology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Stefan Vieths
- Department of Allergology, Paul-Ehrlich-Institut, 63225, Langen, Germany
| | - Eberhard Hildt
- Department of Virology, Paul-Ehrlich-Institut, 63225, Langen, Germany. .,German Center for Infection Research (DZIF), 38124, Braunschweig, Germany.
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24
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Maruyama M, Shibuya K. ε-Polylysine-based thermo-responsive adsorbents for immunoglobulin adsorption-desorption under mild conditions. Biomater Sci 2017. [PMID: 28632279 DOI: 10.1039/c7bm00390k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Thermo-responsive adsorbents for immunoglobulin G (IgG) employing ε-polylysine (EPL) as a polymer backbone were developed. The introduction of mercaptoethylpyridine (MEP) as an IgG-binding ligand and hydrophobization of side chains afforded thermo-responsive IgG adsorbents, whose thermo-responsive IgG desorption ratio was up to 88% (EPL/MEP derivative 3m). The changes in surface densities of active MEP groups, which are caused by thermal conformational changes of the adsorbents, play key roles for IgG desorption. Although a trade-off of IgG adsorption capacity and IgG desorption ratio was observed, the present study offers a novel molecular design for thermo-responsive adsorbents with high synthetic accessibility and potentially low toxicity.
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Affiliation(s)
- Masashi Maruyama
- Center for Technology Innovation - Materials, Research & Development Group, Hitachi Ltd., 7-1-1 Omika, Hitachi City, Ibaraki 319-1292, Japan.
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25
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Dhandhukia JP, Brill DA, Kouhi A, Pastuszka MK, MacKay JA. Elastin-like polypeptide switches: A design strategy to detect multimeric proteins. Protein Sci 2017. [PMID: 28639381 DOI: 10.1002/pro.3215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Elastin-Like Polypeptides (ELPs) reversibly phase separate in response to changes in temperature, pressure, concentration, pH, and ionic species. While powerful triggers, biological microenvironments present a multitude of more specific biological cues, such as antibodies, cytokines, and cell-surface receptors. To develop better biosensors and bioresponsive drug carriers, rational strategies are required to sense and respond to these target proteins. We recently reported that noncovalent association of two ELP fusion proteins to a "chemical inducer of dimerization" small molecule (1.5 kDa) induces phase separation at physiological temperatures. Having detected a small molecule, here we present the first evidence that ELP multimerization can also detect a much larger (60 kDa) protein target. To demonstrate this strategy, ELPs were biotinylated at their amino terminus and mixed with tetrameric streptavidin. At a stoichiometric ratio of [4:1], two to three biotin-ELPs associate with streptavidin into multimeric complexes with an apparent Kd of 5 nM. The increased ELP density around a streptavidin core strongly promotes isothermal phase separation, which was tuned to occur at physiological temperature. This phase separation reverses upon saturation with excess streptavidin, which only favors [1:1] complexes. Together, these findings suggest that ELP association with multimeric biomolecules is a viable strategy to deliberately engineer ELPs that respond to multimeric protein substrates.
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Affiliation(s)
- Jugal P Dhandhukia
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Dab A Brill
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Aida Kouhi
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Martha K Pastuszka
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California
| | - J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California.,Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California, 90089-9121
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26
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Trzebicka B, Szweda R, Kosowski D, Szweda D, Otulakowski Ł, Haladjova E, Dworak A. Thermoresponsive polymer-peptide/protein conjugates. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2016.12.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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27
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Wang JT, Wang L, Ji X, Liu L, Zhao H. Synthesis of Zwitterionic Diblock Copolymers with Cleavable Biotin Groups at the Junction Points and Fabrication of Bioconjugates by Biotin–Streptavidin Coupling. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02665] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jin-Tao Wang
- Key Laboratory of Functional
Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Lin Wang
- Key Laboratory of Functional
Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Xiaotian Ji
- Key Laboratory of Functional
Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Li Liu
- Key Laboratory of Functional
Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Hanying Zhao
- Key Laboratory of Functional
Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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28
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Wang S, Sung KJ, Lin XN, Burns MA. Bead mediated separation of microparticles in droplets. PLoS One 2017; 12:e0173479. [PMID: 28282412 PMCID: PMC5345812 DOI: 10.1371/journal.pone.0173479] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 02/21/2017] [Indexed: 11/25/2022] Open
Abstract
Exchange of components such as particles and cells in droplets is important and highly desired in droplet microfluidic assays, and many current technologies use electrical or magnetic fields to accomplish this process. Bead-based microfluidic techniques offer an alternative approach that uses the bead's solid surface to immobilize targets like particles or biological material. In this paper, we demonstrate a bead-based technique for exchanging droplet content by separating fluorescent microparticles in a microfluidic device. The device uses posts to filter surface-functionalized beads from a droplet and re-capture the filtered beads in a new droplet. With post spacing of 7 μm, beads above 10 μm had 100% capture efficiency. We demonstrate the efficacy of this system using targeted particles that bind onto the functionalized beads and are, therefore, transferred from one solution to another in the device. Binding capacity tests performed in the bulk phase showed an average binding capacity of 5 particles to each bead. The microfluidic device successfully separated the targeted particles from the non-targeted particles with up to 98% purity and 100% yield.
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Affiliation(s)
- Sida Wang
- Department of Chemical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States of America
| | - Ki-Joo Sung
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States of America
| | - Xiaoxia Nina Lin
- Department of Chemical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States of America
- Department of Biomedical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States of America
| | - Mark A. Burns
- Department of Chemical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States of America
- Department of Biomedical Engineering, University of Michigan–Ann Arbor, Ann Arbor, MI, United States of America
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29
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Kobayashi J, Yamato M, Okano T. On-off affinity binding modulation on thermoresponsive polymer-grafted surfaces for capture and release of proteins and cells. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:939-957. [DOI: 10.1080/09205063.2017.1295508] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Jun Kobayashi
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), Tokyo, Japan
| | - Masayuki Yamato
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), Tokyo, Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), Tokyo, Japan
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30
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Carbon Dots for Bioimaging and Biosensing Applications. SPRINGER SERIES ON CHEMICAL SENSORS AND BIOSENSORS 2017. [DOI: 10.1007/5346_2017_10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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31
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Zahedi P, Ziaee M, Abdouss M, Farazin A, Mizaikoff B. Biomacromolecule template-based molecularly imprinted polymers with an emphasis on their synthesis strategies: a review. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3754] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Payam Zahedi
- Nano-Biopolymers Research Laboratory, School of Chemical Engineering, College of Engineering; University of Tehran; PO Box 11155-4563 Tehran Iran
| | - Morteza Ziaee
- Nano-Biopolymers Research Laboratory, School of Chemical Engineering, College of Engineering; University of Tehran; PO Box 11155-4563 Tehran Iran
| | - Majid Abdouss
- Department of Chemistry; Amirkabir University of Technology (Tehran Polytechnic); Tehran Iran
| | - Alireza Farazin
- Department of Chemistry, Faculty of Science; University of Tehran; Tehran Iran
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry; University of Ulm; 89081 Ulm Germany
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32
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Hong E, Usiskin IM, Bergamaschi C, Hanlon DJ, Edelson RL, Justesen S, Pavlakis GN, Flavell RA, Fahmy TM. Configuration-dependent Presentation of Multivalent IL-15:IL-15Rα Enhances the Antigen-specific T Cell Response and Anti-tumor Immunity. J Biol Chem 2015; 291:8931-50. [PMID: 26719339 DOI: 10.1074/jbc.m115.695304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Indexed: 01/08/2023] Open
Abstract
Here we report a "configuration-dependent" mechanism of action for IL-15:IL-15Rα (heterodimeric IL-15 or hetIL-15) where the manner by which IL-15:IL-15Rα molecules are presented to target cells significantly affects its function as a vaccine adjuvant. Although the cellular mechanism of IL-15 trans-presentation via IL-15Rα and its importance for IL-15 function have been described, the full effect of the IL-15:IL-15Rα configuration on responding cells is not yet known. We found that trans-presenting IL-15:IL-15Rα in a multivalent fashion on the surface of antigen-encapsulating nanoparticles enhanced the ability of nanoparticle-treated dendritic cells (DCs) to stimulate antigen-specific CD8(+) T cell responses. Localization of multivalent IL-15:IL-15Rα and encapsulated antigen to the same DC led to maximal T cell responses. Strikingly, DCs incubated with IL-15:IL-15Rα-coated nanoparticles displayed higher levels of functional IL-15 on the cell surface, implicating a mechanism for nanoparticle-mediated transfer of IL-15 to the DC surface. Using artificial antigen-presenting cells to highlight the effect of IL-15 configuration on DCs, we showed that artificial antigen-presenting cells presenting IL-15:IL-15Rα increased the sensitivity and magnitude of the T cell response, whereas IL-2 enhanced the T cell response only when delivered in a paracrine fashion. Therefore, the mode of cytokine presentation (configuration) is important for optimal immune responses. We tested the effect of configuration dependence in an aggressive model of murine melanoma and demonstrated significantly delayed tumor progression induced by IL-15:IL-15Rα-coated nanoparticles in comparison with monovalent IL-15:IL-15Rα. The novel mechanism of IL-15 transfer to the surface of antigen-processing DCs may explain the enhanced potency of IL-15:IL-15Rα-coated nanoparticles for antigen delivery.
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Affiliation(s)
- Enping Hong
- From the Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511
| | - Ilana M Usiskin
- From the Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511
| | - Cristina Bergamaschi
- the Vaccine Branch, National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702, and
| | - Douglas J Hanlon
- Dermatology, Yale University School of Medicine, New Haven, Connecticut 06510
| | - Richard L Edelson
- Dermatology, Yale University School of Medicine, New Haven, Connecticut 06510
| | - Sune Justesen
- the Department of Science, University of Copenhagen, Copenhagen 1017, Denmark
| | - George N Pavlakis
- the Vaccine Branch, National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702, and
| | | | - Tarek M Fahmy
- From the Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511, the Departments of Immunobiology and
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33
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Moatsou D, Li J, Ranji A, Pitto-Barry A, Ntai I, Jewett MC, O’Reilly RK. Self-Assembly of Temperature-Responsive Protein-Polymer Bioconjugates. Bioconjug Chem 2015; 26:1890-9. [PMID: 26083370 PMCID: PMC4577958 DOI: 10.1021/acs.bioconjchem.5b00264] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 06/12/2015] [Indexed: 12/13/2022]
Abstract
We report a simple temperature-responsive bioconjugate system comprising superfolder green fluorescent protein (sfGFP) decorated with poly[(oligo ethylene glycol) methyl ether methacrylate] (PEGMA) polymers. We used amber suppression to site-specifically incorporate the non-canonical azide-functional amino acid p-azidophenylalanine (pAzF) into sfGFP at different positions. The azide moiety on modified sfGFP was then coupled using copper-catalyzed "click" chemistry with the alkyne terminus of a PEGMA synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. The protein in the resulting bioconjugate was found to remain functionally active (i.e., fluorescent) after conjugation. Turbidity measurements revealed that the point of attachment of the polymer onto the protein scaffold has an impact on the thermoresponsive behavior of the resultant bioconjugate. Furthermore, small-angle X-ray scattering analysis showed the wrapping of the polymer around the protein in a temperature-dependent fashion. Our work demonstrates that standard genetic manipulation combined with an expanded genetic code provides an easy way to construct functional hybrid biomaterials where the location of the conjugation site on the protein plays an important role in determining material properties. We anticipate that our approach could be generalized for the synthesis of complex functional materials with precisely defined domain orientation, connectivity, and composition.
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Affiliation(s)
- Dafni Moatsou
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Jian Li
- Department
of Chemical and Biological Engineering, Chemistry of Life Processes
Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Arnaz Ranji
- Department
of Chemical and Biological Engineering, Chemistry of Life Processes
Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Anaïs Pitto-Barry
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Ioanna Ntai
- Department
of Chemical and Biological Engineering, Chemistry of Life Processes
Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael C. Jewett
- Department
of Chemical and Biological Engineering, Chemistry of Life Processes
Institute, Northwestern University, Evanston, Illinois 60208, United States
| | - Rachel K. O’Reilly
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
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34
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Singh RS, Kaur N, Kennedy JF. Pullulan and pullulan derivatives as promising biomolecules for drug and gene targeting. Carbohydr Polym 2015; 123:190-207. [DOI: 10.1016/j.carbpol.2015.01.032] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 01/03/2015] [Accepted: 01/14/2015] [Indexed: 12/22/2022]
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35
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Yamamoto T, Aoki K, Sugiyama A, Doi H, Kodama T, Shimizu Y, Kanai M. Design and synthesis of biotin analogues reversibly binding with streptavidin. Chem Asian J 2015; 10:1071-8. [PMID: 25691069 DOI: 10.1002/asia.201500120] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Indexed: 11/06/2022]
Abstract
Two new biotin analogues, biotin carbonate 5 and biotin carbamate 6, have been synthesized. These molecules were designed to reversibly bind with streptavidin by replacing the hydrogen-bond donor NH group(s) of biotin's cyclic urea moiety with oxygen. Biotin carbonate 5 was synthesized from L-arabinose (7), which furnishes the desired stereochemistry at the 3,4-cis-dihydroxy groups, in 11% overall yield (over 10 steps). Synthesis of biotin carbamate 6 was accomplished from L-cysteine-derived chiral aldehyde 33 in 11% overall yield (over 7 steps). Surface plasmon resonance analysis of water-soluble biotin carbonate analogue 46 and biotin carbamate analogue 47 revealed that KD values of these compounds for binding to streptavidin were 6.7×10(-6) M and 1.7×10(-10) M, respectively. These values were remarkably greater than that of biotin (KD =10(-15) M), and thus indicate the importance of the nitrogen atoms for the strong binding between biotin and streptavidin.
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Affiliation(s)
- Tomohiro Yamamoto
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
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Cobo I, Li M, Sumerlin BS, Perrier S. Smart hybrid materials by conjugation of responsive polymers to biomacromolecules. NATURE MATERIALS 2015; 14:143-59. [PMID: 25401924 DOI: 10.1038/nmat4106] [Citation(s) in RCA: 420] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Accepted: 09/04/2014] [Indexed: 05/18/2023]
Abstract
The chemical structure and function of biomacromolecules has evolved to fill many essential roles in biological systems. More specifically, proteins, peptides, nucleic acids and polysaccharides serve as vital structural components, and mediate chemical transformations and energy/information storage processes required to sustain life. In many cases, the properties and applications of biological macromolecules can be further expanded by attaching synthetic macromolecules. The modification of biomacromolecules by attaching a polymer that changes its properties in response to environmental variations, thus affecting the properties of the biomacromolecule, has led to the emergence of a new family of polymeric biomaterials. Here, we summarize techniques for conjugating responsive polymers to biomacromolecules and highlight applications of these bioconjugates reported so far. In doing so, we aim to show how advances in synthetic tools could lead to rapid expansion in the variety and uses of responsive bioconjugates.
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Affiliation(s)
- Isidro Cobo
- Key Centre for Polymers &Colloids, School of Chemistry, The University of Sydney, New South Wales 2006, Australia
| | - Ming Li
- Tyco Fire Protection Products, Mansfield, Texas 76063, USA
| | - Brent S Sumerlin
- George &Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science &Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA
| | - Sébastien Perrier
- 1] Department of Chemistry, The University of Warwick, Coventry CV4 7AL, UK [2] Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
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Obermeyer AC, Olsen BD. Synthesis and Application of Protein-Containing Block Copolymers. ACS Macro Lett 2015; 4:101-110. [PMID: 35596389 DOI: 10.1021/mz500732e] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Proteins possess an impressive array of functionality ranging from catalytic activity to selective binding and mechanical strength, making them highly attractive for materials engineering. Conjugation of synthetic polymers to proteins has the potential to improve the physical properties of the protein as well as provide functionality not typically found in native proteins, such as stimuli-responsive behavior and the programmable ability to self-assemble. This viewpoint discusses the design of protein-polymer conjugates, an important class of block copolymers. Use of these hybrid molecules in biological and catalytic applications is highlighted, and the ability of the polymer to direct the solution and solid-state self-assembly of the hybrid block copolymers is reviewed. Future challenges in polymer and material science that will enable these hybrid molecules to reach their potential as protein-based materials are outlined.
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Affiliation(s)
- Allie C. Obermeyer
- Department
of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Bradley D. Olsen
- Department
of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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38
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Wu Y, Ng DYW, Kuan SL, Weil T. Protein–polymer therapeutics: a macromolecular perspective. Biomater Sci 2015. [DOI: 10.1039/c4bm00270a] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of protein–polymer hybrids emerged several decades ago with the vision that their synergistic combination will offer macromolecular hybrids with manifold features to succeed as the next generation therapeutics.
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Affiliation(s)
- Yuzhou Wu
- Institute of Organic Chemistry III
- Macromolecular Chemistry
- Albert-Einstein-Allee 11
- 89081 Ulm
- Germany
| | - David Y. W. Ng
- Institute of Organic Chemistry III
- Macromolecular Chemistry
- Albert-Einstein-Allee 11
- 89081 Ulm
- Germany
| | - Seah Ling Kuan
- Institute of Organic Chemistry III
- Macromolecular Chemistry
- Albert-Einstein-Allee 11
- 89081 Ulm
- Germany
| | - Tanja Weil
- Institute of Organic Chemistry III
- Macromolecular Chemistry
- Albert-Einstein-Allee 11
- 89081 Ulm
- Germany
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39
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Tan H, Zhao L, Liu W, Ren L, Xu S, Chen L, Li W. Synthesis of thermo-responsive polymer–protein conjugates through disulfide bonding. RSC Adv 2014. [DOI: 10.1039/c4ra06813k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Srinivasan N, Bhagawati M, Ananthanarayanan B, Kumar S. Stimuli-sensitive intrinsically disordered protein brushes. Nat Commun 2014; 5:5145. [PMID: 25312006 DOI: 10.1038/ncomms6145] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Accepted: 09/04/2014] [Indexed: 12/11/2022] Open
Abstract
Grafting polymers onto surfaces at high density to yield polymer brush coatings is a widely employed strategy to reduce biofouling and interfacial friction. These brushes almost universally feature synthetic polymers, which are often heterogeneous and do not readily allow incorporation of chemical functionalities at precise sites along the constituent chains. To complement these synthetic systems, we introduce a biomimetic, recombinant intrinsically disordered protein that can assemble into an environment-sensitive brush. This macromolecule adopts an extended conformation and can be grafted to solid supports to form oriented protein brushes that swell and collapse dramatically with changes in solution pH and ionic strength. We illustrate the value of sequence specificity by using proteases with mutually orthogonal recognition sites to modulate brush height in situ to predictable values. This study demonstrates that stimuli-responsive brushes can be fabricated from proteins and introduces them as a new class of smart biomaterial building blocks.
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Affiliation(s)
- Nithya Srinivasan
- Department of Bioengineering, University of California, Berkeley, California 94720, USA
| | - Maniraj Bhagawati
- Department of Bioengineering, University of California, Berkeley, California 94720, USA
| | | | - Sanjay Kumar
- Department of Bioengineering, University of California, Berkeley, California 94720, USA
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41
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Li H, Kong W, Liu J, Yang M, Huang H, Liu Y, Kang Z. Carbon dots for photoswitching enzyme catalytic activity. J Mater Chem B 2014; 2:5652-5658. [DOI: 10.1039/c4tb00705k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Cao J, Liu S, Chen Y, Shi L, Zhang Z. Synthesis of end-functionalized boronic acid containing copolymers and their bioconjugates with rod-like viruses for multiple responsive hydrogels. Polym Chem 2014. [DOI: 10.1039/c4py00508b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
End-functionalized boronic acid containing copolymers are grafted to a rod-like M13 virus. The resultant virus polymer can reversibly form hydrogels, which can be regulated by temperature, pH and glucose.
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Affiliation(s)
- Jun Cao
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)
| | - Shuaiyu Liu
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)
| | - Yingjun Chen
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)
| | - Linqi Shi
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)
| | - Zhenkun Zhang
- Key Laboratory of Functional Polymer Materials of Ministry of Education
- Institute of Polymer Chemistry
- Nankai University
- Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)
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Yi Y, Zheng S. Synthesis and self-assembly behavior of organic–inorganic macrocyclic molecular brushes composed of macrocyclic oligomeric silsesquioxane and poly(N-isopropylacrylamide). RSC Adv 2014. [DOI: 10.1039/c4ra02624a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Macrocyclic molecular brushes composed of macrocyclic oligomeric silsesquioxanes and poly(N-isopropylacrylamide) were synthesized via the ATRP approach; they displayed self-assembly behavior.
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Affiliation(s)
- Yulin Yi
- Department of Polymer Science and Engineering
- The State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
| | - Sixun Zheng
- Department of Polymer Science and Engineering
- The State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai 200240, China
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Pollheimer P, Taskinen B, Scherfler A, Gusenkov S, Creus M, Wiesauer P, Zauner D, Schöfberger W, Schwarzinger C, Ebner A, Tampé R, Stutz H, Hytönen VP, Gruber HJ. Reversible biofunctionalization of surfaces with a switchable mutant of avidin. Bioconjug Chem 2013; 24:1656-68. [PMID: 23978112 DOI: 10.1021/bc400087e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Label-free biosensors detect binding of prey molecules (″analytes″) to immobile bait molecules on the sensing surface. Numerous methods are available for immobilization of bait molecules. A convenient option is binding of biotinylated bait molecules to streptavidin-functionalized surfaces, or to biotinylated surfaces via biotin-avidin-biotin bridges. The goal of this study was to find a rapid method for reversible immobilization of biotinylated bait molecules on biotinylated sensor chips. The task was to establish a biotin-avidin-biotin bridge which was easily cleaved when desired, yet perfectly stable under a wide range of measurement conditions. The problem was solved with the avidin mutant M96H which contains extra histidine residues at the subunit-subunit interfaces. This mutant was bound to a mixed self-assembled monolayer (SAM) containing biotin residues on 20% of the oligo(ethylene glycol)-terminated SAM components. Various biotinylated bait molecules were bound on top of the immobilized avidin mutant. The biotin-avidin-biotin bridge was stable at pH ≥3, and it was insensitive to sodium dodecyl sulfate (SDS) at neutral pH. Only the combination of citric acid (2.5%, pH 2) and SDS (0.25%) caused instantaneous cleavage of the biotin-avidin-biotin bridge. As a consequence, the biotinylated bait molecules could be immobilized and removed as often as desired, the only limit being the time span for reproducible chip function when kept in buffer (2-3 weeks at 25 °C). As expected, the high isolectric pH (pI) of the avidin mutant caused nonspecific adsorption of proteins. This problem was solved by acetylation of avidin (to pI < 5), or by optimization of SAM formation and passivation with biotin-BSA and BSA.
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Affiliation(s)
- Philipp Pollheimer
- Institute of Biophysics, Johannes Kepler University , Gruberstr. 40, 4020 Linz, Austria
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Ebara M, Hoffman JM, Hoffman AS, Stayton PS, Lai JJ. A photoinduced nanoparticle separation in microchannels via pH-sensitive surface traps. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5388-93. [PMID: 23581256 PMCID: PMC3742372 DOI: 10.1021/la400347r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A microfluidic surface trap was developed for capturing pH-sensitive nanoparticles via a photoinitiated proton-releasing reaction of o-nitrobenzaldehyde (o-NBA) that reduces the solution pH in microchannels. The surface trap and nanoparticles were both modified with a pH-responsive polymer-poly(N-isorpopylacylamide-co-propylacrylic acid), P(NIPAAm-co-PAA). The o-NBA-coated microchannel walls demonstrated rapid proton release upon UV light irradiation, allowing the buffered solution pH in the microchannel to decrease from 7.4 to 4.5 in 60 s. The low solution pH switched the polymer-modified surfaces to be more hydrophobic, which enabled the capture of the pH-sensitive nanobeads onto the trap. When a photomask was utilized to limit the UV irradiation to a specific channel region, we were able to restrict the particle separation to only the exposed region. Via control of the UV irradiation, this technique enables not only prompt pH changes within the channel but also the capture of target molecules at specific channel locations.
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Affiliation(s)
- Mitsuhiro Ebara
- Department of Bioengineering, Box 355061, University of Washington, Seattle, WA, 98195, USA
- Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, JAPAN
| | - John M. Hoffman
- Department of Bioengineering, Box 355061, University of Washington, Seattle, WA, 98195, USA
| | - Allan S. Hoffman
- Department of Bioengineering, Box 355061, University of Washington, Seattle, WA, 98195, USA
| | - Patrick S. Stayton
- Department of Bioengineering, Box 355061, University of Washington, Seattle, WA, 98195, USA
| | - James J. Lai
- Department of Bioengineering, Box 355061, University of Washington, Seattle, WA, 98195, USA
- To whom correspondence should be addressed. ; Fax: +1 (206) 616-3928; Tel: +1 (206) 221-5168
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Lou SF, Zhang H, Williams GR, Branford-White C, Nie HL, Quan J, Zhu LM. Fabrication and aggregation of thermoresponsive glucose-functionalized double hydrophilic copolymers. Colloids Surf B Biointerfaces 2013; 105:180-6. [DOI: 10.1016/j.colsurfb.2012.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 12/13/2012] [Accepted: 12/13/2012] [Indexed: 10/27/2022]
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Alconcel SNS, Kim SH, Tao L, Maynard HD. Synthesis of biotinylated aldehyde polymers for biomolecule conjugation. Macromol Rapid Commun 2013; 34:983-9. [PMID: 23553922 DOI: 10.1002/marc.201300205] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Revised: 03/01/2013] [Indexed: 02/04/2023]
Abstract
Biotinylated polymers with side-chain aldehydes were prepared for use as multifunctional scaffolds. Two different biotin-containing chain transfer agents (CTAs) and an aldehyde-containing monomer, 6-oxohexyl acrylate (6OHA), are synthesized. Poly(ethylene glycol) methyl ether acrylate (PEGA) and 6OHA are copolymerized by reversible addition-fragmentation chain transfer (RAFT) polymerization in the presence of the biotinylated CTAs. The resulting polymers are analyzed by GPC and(1) H NMR spectroscopy. The polymer end groups contained a disulfide bond, which could be readily reduced in solution to remove the biotin. Reactivity of the aldehyde side chains is demonstrated by oxime and hydrazone formation at the polymer side chains, and conjugate formation of fluorescently labeled polymers with streptavidin is investigated by gel electrophoresis.
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Affiliation(s)
- Steevens N S Alconcel
- Department of Chemistry & Biochemistry, California NanoSystems Institute, University of California, 607 Charles E. Young Dr East, Los Angeles, CA 90095, USA
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Zimmermann R, Dukhin SS, Werner C, Duval JF. On the use of electrokinetics for unraveling charging and structure of soft planar polymer films. Curr Opin Colloid Interface Sci 2013. [DOI: 10.1016/j.cocis.2013.02.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Dhandhukia J, Weitzhandler I, Wang W, MacKay JA. Switchable elastin-like polypeptides that respond to chemical inducers of dimerization. Biomacromolecules 2013; 14:976-85. [PMID: 23406497 DOI: 10.1021/bm301558q] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Elastin-like polypeptides (ELPs) are protein polymers that reversibly phase separate in response to increased temperature, pressure, concentration, ionic strength, and molecular weight. If it were possible to engineer their phase separation to respond to specific molecular substrates, ELP fusion proteins might be engineered as biosensors, smart biomaterials, diagnostic imaging agents, and targeted therapies. What has been lacking is a strategy to design ELPs to respond to specific substrates. To address this deficiency, we report that ELP fusion proteins phase separate in response to chemical inducers of dimerization (CID). The rationale is that ELP phase separation depends on molecular weight, concentration, and local hydrophobicity; therefore, processes that affect these properties, including noncovalent dimerization, can be tuned to produce isothermal phase separation. To test this hypothesis, constructs were evaluated consisting of an immunophilin: human FK-506 binding protein 12 (FKBP) attached to an ELP. Under stoichiometric binding of a CID, the fusion protein homodimerizes and triggers phase separation. This dimerization is reversible upon saturation with excess CID or competitive binding of a small lipophilic macrolide to FKBP. By modulating the ELP molecular weight, phase separation was tuned for isothermal response to CID at physiological ionic strength and temperature (37 °C). To interpret the relationship between transition temperature and equilibrium binding constants, an empirical mathematical model was employed. To the best of our knowledge, this report is the first demonstration of reversible ELP switching in response to controlled dimerization. Due to its simplicity, this strategy may be useful to design ELP fusion proteins that respond to specific dimeric biological entities.
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Affiliation(s)
- Jugal Dhandhukia
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, School of Pharmacy, 1985 Zonal Avenue, Los Angeles, California 90033-9121, USA
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