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Lei C, Li Z, Ma S, Zhang Q, Guo J, Ouyang Q, Lei Q, Zhou L, Yang J, Lin J, Ettlinger R, Wuttke S, Li X, Brinker CJ, Zhu W. Improving normothermic machine perfusion and blood transfusion through biocompatible blood silicification. Proc Natl Acad Sci U S A 2024; 121:e2322418121. [PMID: 39159377 DOI: 10.1073/pnas.2322418121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 07/11/2024] [Indexed: 08/21/2024] Open
Abstract
The growing world population and increasing life expectancy are driving the need to improve the quality of blood transfusion, organ transplantation, and preservation. Here, to improve the ability of red blood cells (RBCs) for normothermic machine perfusion, a biocompatible blood silicification approach termed "shielding-augmenting RBC-in-nanoscale amorphous silica (SARNAS)" has been developed. The key to RBC surface engineering and structure augmentation is the precise control of the hydrolysis form of silicic acid to realize stabilization of RBC within conformal nanoscale silica-based exoskeletons. The formed silicified RBCs (Si-RBCs) maintain membrane/structural integrity, normal cellular functions (e.g., metabolism, oxygen-carrying capability), and enhance resistance to external stressors as well as tunable mechanical properties, resulting in nearly 100% RBC cryoprotection. In vivo experiments confirm their excellent biocompatibility. By shielding RBC surface antigens, the Si-RBCs provide universal blood compatibility, the ability for allogeneic mechanical perfusion, and more importantly, the possibility for cross-species transfusion. Being simple, reliable, and easily scalable, the SARNAS strategy holds great promise to revolutionize the use of engineered blood for future clinical applications.
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Affiliation(s)
- Chuanyi Lei
- MOE International Joint Research Laboratory on Synthetic Biology and Medicines, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, People's Republic of China
| | - Zeyu Li
- MOE International Joint Research Laboratory on Synthetic Biology and Medicines, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, People's Republic of China
| | - Shuhao Ma
- State Key Laboratory of Fluid Power and Mechatronic Systems, Department of Engineering Mechanics, and Center for X-Mechanics, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Qi Zhang
- The Second Affiliated Hospital of Anhui Medical University, Hefei 23060, People's Republic of China
| | - Jimin Guo
- Center for Micro-Engineered Materials and the Department of Chemical and Biological Engineering, The University of New Mexico, Albuquerque, NM 87131
| | - Qing Ouyang
- Department of Hepatobiliary Surgery and Liver Transplant Center, The General Hospital of Southern Theater, Guangzhou 510010, People's Republic of China
| | - Qi Lei
- MOE International Joint Research Laboratory on Synthetic Biology and Medicines, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, People's Republic of China
| | - Liang Zhou
- MOE International Joint Research Laboratory on Synthetic Biology and Medicines, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, People's Republic of China
| | - Junxian Yang
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Jiangguo Lin
- Research Department of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Romy Ettlinger
- EastChem School of Chemistry, University of St Andrews, North Haugh, St. Andrews KY16 9ST, United Kingdom
| | - Stefan Wuttke
- BCMaterials, Basque Center for Materials, UPV/EHU Science Park, Leioa 48950, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48009, Spain
| | - Xuejin Li
- State Key Laboratory of Fluid Power and Mechatronic Systems, Department of Engineering Mechanics, and Center for X-Mechanics, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - C Jeffrey Brinker
- Center for Micro-Engineered Materials and the Department of Chemical and Biological Engineering, The University of New Mexico, Albuquerque, NM 87131
| | - Wei Zhu
- MOE International Joint Research Laboratory on Synthetic Biology and Medicines, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, People's Republic of China
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2
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Wu D, Lei J, Zhang Z, Huang F, Buljan M, Yu G. Polymerization in living organisms. Chem Soc Rev 2023; 52:2911-2945. [PMID: 36987988 DOI: 10.1039/d2cs00759b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Vital biomacromolecules, such as RNA, DNA, polysaccharides and proteins, are synthesized inside cells via the polymerization of small biomolecules to support and multiply life. The study of polymerization reactions in living organisms is an emerging field in which the high diversity and efficiency of chemistry as well as the flexibility and ingeniousness of physiological environment are incisively and vividly embodied. Efforts have been made to design and develop in situ intra/extracellular polymerization reactions. Many important research areas, including cell surface engineering, biocompatible polymerization, cell behavior regulation, living cell imaging, targeted bacteriostasis and precise tumor therapy, have witnessed the elegant demeanour of polymerization reactions in living organisms. In this review, recent advances in polymerization in living organisms are summarized and presented according to different polymerization methods. The inspiration from biomacromolecule synthesis in nature highlights the feasibility and uniqueness of triggering living polymerization for cell-based biological applications. A series of examples of polymerization reactions in living organisms are discussed, along with their designs, mechanisms of action, and corresponding applications. The current challenges and prospects in this lifeful field are also proposed.
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Affiliation(s)
- Dan Wu
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
- College of Materials Science and Engineering, Zhejiang University of Technology Hangzhou, 310014, P. R. China
| | - Jiaqi Lei
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
| | - Zhankui Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology Hangzhou, 310014, P. R. China
| | - Feihe Huang
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, P. R. China
| | - Marija Buljan
- Empa, Swiss Federal Laboratories for Materials Science and Technology, 9014 St. Gallen, Switzerland
| | - Guocan Yu
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
- School of Medicine, Tsinghua University, Beijing 100084, P. R. China
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Perumal G, Pappuru S, Doble M, Chakraborty D, Shajahan S, Abu Haija M. Controlled Synthesis of Dendrite-like Polyglycerols Using Aluminum Complex for Biomedical Applications. ACS OMEGA 2023; 8:2377-2388. [PMID: 36687077 PMCID: PMC9851026 DOI: 10.1021/acsomega.2c06761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
This work describes a one-pot synthesis of dendrite-like hyperbranched polyglycerols (HPGs) via a ring-opening multibranching polymerization (ROMBP) process using a bis(5,7-dichloro-2-methyl-8-quinolinolato)methyl aluminum complex (1) as a catalyst and 1,1,1-tris(hydroxymethyl)propane/trimethylol propane (TMP) as an initiator. Single-crystal X-ray diffraction (XRD) analysis was used to elucidate the molecular structure of complex 1. Inverse-gated (IG)13C NMR analysis of HPGs showed degree of branching between 0.50 and 0.57. Gel permeation chromatography (GPC) analysis of the HPG polymers provided low, medium, and high-molecular weight (M n) polymers ranging from 14 to 73 kDa and molecular weight distributions (M w/M n) between 1.16 and 1.35. The obtained HPGs exhibited high wettability with water contact angle between 18 and 21° and T g ranging between -39 and -55 °C. Notably, ancillary ligand-supported aluminum complexes as catalysts for HPG polymerization reactions have not been reported to date. The obtained HPG polymers in the presence of the aluminum complex (1) can be used for various biomedical applications. Here, nanocomposite electrospun fibers were fabricated with synthesized HPG polymer. The nanofibers were subjected to cell culture experiments to evaluate cytocompatibility behavior with L929 and MG63 cells. The cytocompatibility studies of HPG polymer and nanocomposite scaffold showed high cell viability and spreading. The study results concluded, synthesized HPG polymers and composite nanofibers can be used for various biomedical applications.
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Affiliation(s)
- Govindaraj Perumal
- Department
of Conservative Dentistry and Endodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical
and Technical Sciences (SIMATS), Chennai600 077, India
| | - Sreenath Pappuru
- Faculty
of Chemical Engineering and the Grand Technion Energy Program, Technion-Israel Institute of Technology, Haifa320003, Israel
| | - Mukesh Doble
- Department
of Conservative Dentistry and Endodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical
and Technical Sciences (SIMATS), Chennai600 077, India
| | - Debashis Chakraborty
- Department
of Chemistry, Indian Institute of Technology
Madras, Chennai600 036, India
| | - Shanavas Shajahan
- Department
of Chemistry, Khalifa University of Science
and Technology, Abu Dhabi127788, United
Arab Emirates
| | - Mohammad Abu Haija
- Center
for Catalysis and Separations, Khalifa University
of Science and Technology, Abu Dhabi127788, United Arab Emirates
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4
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Abstract
The polymerization of biomolecules is a central operation in biology that connects molecular signals with proliferative and information-rich events in cells. As molecules arrange precisely across 3-D space, they create new functional capabilities such as catalysis and transport highways and exhibit new phase separation phenomena that fuel nonequilibrium dynamics in cells. Hence, the observed polymer chemistry manifests itself as a molecular basis leading to cellular phenotypes, expressed as a multitude of hierarchical structures found in cell biology. Although many milestone discoveries had accompanied the rise of the synthetic polymer era, fundamental studies were realized within a closed, pristine environment and that their behavior in a complex multicomponent system remains challenging and thus unexplored. From this perspective, there is a rich trove of undiscovered knowledge that awaits the polymer science community that can revolutionize understanding in the interactive nanoscale world of the living cell.In this Account, we discuss the strategies that have enabled synthetic polymer chemistry to be conducted within the cells (membrane inclusive) and to establish monomer design principles that offer spatiotemporal control of the polymerization. As reaction considerations such as monomer concentration, polymer growth dynamics, and reactivities are intertwined with the subcellular environment and transport processes, we first provide a chemical narrative of each major cellular compartment. The conditions within each compartment will therefore set the boundaries on the type of polymer chemistry that can be conducted. Both covalent and supramolecular polymerization concepts are explored separately in the context of scaffold design, polymerization mechanism, and activation. To facilitate transport into a localized subcellular space, we show that monomers can be reversibly modified by targeting groups or stimulus-responsive motifs that react within the specific compartment. Upon polymerization, we discuss the characterization of the resultant polymeric structures and how these phase-separated structures would impact biological processes such as cell cycle, metabolism, and apoptosis. As we begin to integrate cellular biochemistry with in situ polymer science, we identify landmark challenges and technological hurdles that, when overcome, would lead to invaluable discoveries in macromolecular therapeutics and biology.
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Liu K, He Y, Yao Y, Zhang Y, Cai Z, Ru J, Zhang X, Jin X, Xu M, Li Y, Ma Q, Gao J, Lu F. Methoxy polyethylene glycol modification promotes adipogenesis by inducing the production of regulatory T cells in xenogeneic acellular adipose matrix. Mater Today Bio 2021; 12:100161. [PMID: 34870140 PMCID: PMC8626673 DOI: 10.1016/j.mtbio.2021.100161] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 12/22/2022] Open
Abstract
Acellular adipose matrix (AAM) has emerged as an important biomaterial for adipose tissue regeneration. Current decellularization methods damage the bioactive components of the extracellular matrix (ECM), and the residual immunogenic antigens may induce adverse immune responses. Here, we adopted a modified decellularization method which can protect more bioactive components with less immune reaction by methoxy polyethylene glycol (mPEG). Then, we determined the adipogenic mechanisms of mPEG-modified AAM after xenogeneic transplantation. AAM transplantation caused significantly lesser adipogenesis in the wild-type group than in the immune-deficient group. The mPEG-modified AAM showed significantly lower immunogenicity and higher adipogenesis than the AAM alone after xenogeneic transplantation. Furthermore, mPEG modification increased regulatory T (Treg) cell numbers in the AAM grafts, which in turn enhanced the M2/M1 macrophage ratio by secreting IL-10, IL-13, and TGF-β1. These findings suggest that mPEG modification effectively reduces the immunogenicity of xenogeneic AAM and promotes adipogenesis in the AAM grafts. Hence, mPEG-modified AAM can serve as an ideal biomaterial for xenogeneic adipose tissue engineering.
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Affiliation(s)
- Kaiyang Liu
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yunfan He
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yao Yao
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yuchen Zhang
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Zihan Cai
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Jiangjiang Ru
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Xiangdong Zhang
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Xiaoxuan Jin
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Mimi Xu
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yibao Li
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Qizhuan Ma
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Jianhua Gao
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Feng Lu
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
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Lee H, Kim N, Rheem HB, Kim BJ, Park JH, Choi IS. A Decade of Advances in Single-Cell Nanocoating for Mammalian Cells. Adv Healthc Mater 2021; 10:e2100347. [PMID: 33890422 DOI: 10.1002/adhm.202100347] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/06/2021] [Indexed: 12/14/2022]
Abstract
Strategic advances in the single-cell nanocoating of mammalian cells have noticeably been made during the last decade, and many potential applications have been demonstrated. Various cell-coating strategies have been proposed via adaptation of reported methods in the surface sciences and/or materials identification that ensure the sustainability of labile mammalian cells during chemical manipulation. Here an overview of the methodological development and potential applications to the healthcare sector in the nanocoating of mammalian cells made during the last decade is provided. The materials used for the nanocoating are categorized into polymers, hydrogels, polyphenolic compounds, nanoparticles, and minerals, and the corresponding strategies are described under the given set of materials. It also suggests, as a future direction, the creation of the cytospace system that is hierarchically composed of the physically separated but mutually interacting cellular hybrids.
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Affiliation(s)
- Hojae Lee
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Nayoung Kim
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Hyeong Bin Rheem
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Beom Jin Kim
- Department of Chemistry University of Ulsan Ulsan 44610 Korea
| | - Ji Hun Park
- Department of Science Education Ewha Womans University Seoul 03760 Korea
| | - Insung S. Choi
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
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7
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Qi R, Zhao H, Zhou X, Liu J, Dai N, Zeng Y, Zhang E, Lv F, Huang Y, Liu L, Wang Y, Wang S. In Situ Synthesis of Photoactive Polymers on a Living Cell Surface via Bio‐Palladium Catalysis for Modulating Biological Functions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015247] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ruilian Qi
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Hao Zhao
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Xin Zhou
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Jian Liu
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Nan Dai
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yue Zeng
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Endong Zhang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Fengting Lv
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yiming Huang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Libing Liu
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yilin Wang
- Key Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Shu Wang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
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8
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Qi R, Zhao H, Zhou X, Liu J, Dai N, Zeng Y, Zhang E, Lv F, Huang Y, Liu L, Wang Y, Wang S. In Situ Synthesis of Photoactive Polymers on a Living Cell Surface via Bio‐Palladium Catalysis for Modulating Biological Functions. Angew Chem Int Ed Engl 2021; 60:5759-5765. [DOI: 10.1002/anie.202015247] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Indexed: 01/24/2023]
Affiliation(s)
- Ruilian Qi
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Hao Zhao
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Xin Zhou
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Jian Liu
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Nan Dai
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yue Zeng
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Endong Zhang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Fengting Lv
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yiming Huang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Libing Liu
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Yilin Wang
- Key Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Shu Wang
- Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- College of Chemistry University of Chinese Academy of Sciences Beijing 100049 P. R. China
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9
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Zhou Y, Wei W, Cui F, Yan Z, Sun Y, Ren J, Qu X. Construction of a chiral artificial enzyme used for enantioselective catalysis in live cells. Chem Sci 2020; 11:11344-11350. [PMID: 34094377 PMCID: PMC8162767 DOI: 10.1039/d0sc03082a] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 09/22/2020] [Indexed: 01/13/2023] Open
Abstract
Nanozymes as a newcomer in the artificial enzyme family have shown several advantages over natural enzymes such as their high stability in harsh environments, facile production on large scale, long storage time, low costs, and higher resistance to biodegradation. However, compared with natural enzymes, it is still a great challenge to design a nanozyme with high selectivity, especially high enantioselectivity. It is highly desirable and demanding to develop chiral nanozymes with high and on-demand enantioselectivity for practical applications. Herein, we present an unprecedented approach to construct chiral artificial peroxidase with ultrahigh enantioselectivity. Inspired by the structure of the natural enzyme horseradish peroxidase (HRP), we have constructed a series of stereoselective nanozymes (Fe3O4@Poly(AA)) by using the ferromagnetic nanoparticle (Fe3O4 NP) yolk as the catalytic core and amino acid-appended chiral polymer shell as the chiral selector. Among them, Fe3O4@Poly(d-Trp) exhibits the highest enantioselectivity. More intriguingly, their enantioselectivity will be readily reversed by replacing d-Trp with l-Trp. The selectivity factor is up to 5.38, even higher than that of HRP. Kinetic parameters, dialysis experiments, and molecular simulations together with activation energy reveal that the selectivity originates from the d-/l-Trp appended polymer shell, which can result in better affinity and catalytic activity to d-/l-tyrosinol. The artificial peroxidases have been used for asymmetric catalysis to prepare enantiopure d- or l-enantiomers. Besides, by using fluorescent labelled FITC-tyrosinolL and RhB-tyrosinolD, the artificial peroxidases can catalyze green or red fluorescent chiral tyrosinol to selectively label live yeast cells among yeast, S. aureus, E. coli and B. subtilis bacterial cells. This work opens a new avenue for better design of stereoselective artificial enzymes.
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Affiliation(s)
- Ya Zhou
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
| | - Weili Wei
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
| | - Fengchao Cui
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
| | - Zhengqing Yan
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
| | - Yuhuan Sun
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 China
- University of Science and Technology of China Hefei Anhui 230026 China
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10
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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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11
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12
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Zhao Y, Fan M, Chen Y, Liu Z, Shao C, Jin B, Wang X, Hui L, Wang S, Liao Z, Ling D, Tang R, Wang B. Surface-anchored framework for generating RhD-epitope stealth red blood cells. SCIENCE ADVANCES 2020; 6:eaaw9679. [PMID: 32219154 PMCID: PMC7083617 DOI: 10.1126/sciadv.aaw9679] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 12/26/2019] [Indexed: 05/10/2023]
Abstract
Rhesus D (RhD) is one of the most important immunogenic antigens on red blood cells (RBCs). However, the supply of RhD-negative blood frequently faces critical shortages in clinical practice, and the positive-to-negative transition of the RhD antigen remains a great challenge. Here, we developed an alternative approach for sheltering the epitopes on RhD-positive RBCs using a surface-anchored framework, which is flexible but can achieve an optimal shield effect with minimal physicochemical influence on the cell. The chemical framework completely obstructed the RhD antigens on the cell surface, and the assessments of both blood transfusion in a mouse model and immunostimulation with human RhD-positive RBCs in a rabbit model confirmed the RhD-epitope stealth characteristics of the engineered RBCs. This work provides an efficient methodology for improving the cell surface for universal blood transfusion and generally indicates the potential of rationally designed cell surface engineering for transfusion and transplantation medicine.
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Affiliation(s)
- Yueqi Zhao
- Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Mingjie Fan
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310029, China
| | - Yanni Chen
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310029, China
| | - Zhaoming Liu
- Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Changyu Shao
- Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Biao Jin
- Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Xiaoyu Wang
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China
| | - Lanlan Hui
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310029, China
| | - Shuaifei Wang
- Institute of Pharmaceutics and Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- Affiliated Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhaoping Liao
- Department of Transfusion, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Daishun Ling
- Institute of Pharmaceutics and Hangzhou Institute of Innovative Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ruikang Tang
- Center for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
- Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou 310027, China
| | - Ben Wang
- Cancer Institute (Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education), The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
- Institute of Translational Medicine, Zhejiang University, Hangzhou 310029, China
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13
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Miura Y. Controlled polymerization for the development of bioconjugate polymers and materials. J Mater Chem B 2020; 8:2010-2019. [DOI: 10.1039/c9tb02418b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugates of various biopolymers with synthetic polymers were preparedvialiving radical polymerization. The conjugates have precise structures and potential for novel biofunctional materials.
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Affiliation(s)
- Yoshiko Miura
- Department of Chemical Engineering
- Graduate School of Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
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14
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Pathak S, Pham TT, Jeong JH, Byun Y. Immunoisolation of pancreatic islets via thin-layer surface modification. J Control Release 2019; 305:176-193. [DOI: 10.1016/j.jconrel.2019.04.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 04/15/2019] [Accepted: 04/22/2019] [Indexed: 12/13/2022]
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15
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Wu Y, Wu S, Ma S, Yan F, Weng Z. Cytocompatible Modification of Thermoresponsive Polymers on Living Cells for Membrane Proteomic Isolation and Analysis. Anal Chem 2019; 91:3187-3194. [DOI: 10.1021/acs.analchem.8b04201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Yuanzi Wu
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Shuigen Wu
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Shanyun Ma
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Fen Yan
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Zuquan Weng
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350002, China
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16
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Oncotically Driven Control over Glycocalyx Dimension for Cell Surface Engineering and Protein Binding in the Longitudinal Direction. Sci Rep 2018; 8:7581. [PMID: 29765073 PMCID: PMC5954099 DOI: 10.1038/s41598-018-25870-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 05/01/2018] [Indexed: 01/03/2023] Open
Abstract
Here we present a simple technique for re-directing reactions on the cell surface to the outermost region of the glycocalyx. Macromolecular crowding with inert polymers was utilized to reversibly alter the accessibility of glycocalyx proteoglycans toward cell-surface reactive probes allowing for reactivity control in the longitudinal direction (‘z’-direction) on the glycocalyx. Studies in HUVECs demonstrated an oncotically driven collapse of the glycocalyx brush structure in the presence of crowders as the mechanism responsible for re-directing reactivity. This phenomenon is consistent across a variety of macromolecular agents including polymers, protein markers and antibodies which all displayed enhanced binding to the outermost surface of multiple cell types. We then demonstrated the biological significance of the technique by increasing the camouflage of red blood cell surface antigens via a crowding-enhanced attachment of voluminous polymers to the exterior of the glycocalyx. The accessibility to Rhesus D (RhD) and CD47 proteins on the cell surface was significantly decreased in crowding-assisted polymer grafting in comparison to non-crowded conditions. This strategy is expected to generate new tools for controlled glycocalyx engineering, probing the glycocalyx structure and function, and improving the development of cell based therapies.
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17
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Kim H, Shin K, Park OK, Choi D, Kim HD, Baik S, Lee SH, Kwon SH, Yarema KJ, Hong J, Hyeon T, Hwang NS. General and Facile Coating of Single Cells via Mild Reduction. J Am Chem Soc 2018; 140:1199-1202. [DOI: 10.1021/jacs.7b08440] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hyunbum Kim
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Kwangsoo Shin
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center
for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Ok Kyu Park
- Center
for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Daheui Choi
- School
of Chemical Engineering and Material Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hwan D. Kim
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Seungmin Baik
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center
for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Soo Hong Lee
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center
for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Seung-Hae Kwon
- Division
of Bio-imaging, Korea Basic Science Institute (KSBI), Chun-Cheon 24341, Republic of Korea
| | - Kevin J. Yarema
- Department
of Biomedical Engineering and Translational Tissue Engineering Center, The Johns Hopkins University, Baltimore, Maryland 21205, United States of America
| | - Jinkee Hong
- School
of Chemical Engineering and Material Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Taeghwan Hyeon
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
- Center
for Nanoparticle Research, Institute of Basic Science (IBS), Seoul 08826, Republic of Korea
| | - Nathaniel S. Hwang
- School
of Chemical and Biological Engineering, and Institute of Chemical
Processes, Seoul National University, Seoul 08826, Republic of Korea
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18
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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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19
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Shanmugam S, Xu J, Boyer C. Photocontrolled Living Polymerization Systems with Reversible Deactivations through Electron and Energy Transfer. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201700143] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/10/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Sivaprakash Shanmugam
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia
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20
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Niu J, Lunn DJ, Pusuluri A, Yoo JI, O'Malley MA, Mitragotri S, Soh HT, Hawker CJ. Engineering live cell surfaces with functional polymers via cytocompatible controlled radical polymerization. Nat Chem 2017; 9:537-545. [PMID: 28537595 DOI: 10.1038/nchem.2713] [Citation(s) in RCA: 268] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 11/30/2016] [Indexed: 02/08/2023]
Abstract
The capability to graft synthetic polymers onto the surfaces of live cells offers the potential to manipulate and control their phenotype and underlying cellular processes. Conventional grafting-to strategies for conjugating preformed polymers to cell surfaces are limited by low polymer grafting efficiency. Here we report an alternative grafting-from strategy for directly engineering the surfaces of live yeast and mammalian cells through cell surface-initiated controlled radical polymerization. By developing cytocompatible PET-RAFT (photoinduced electron transfer-reversible addition-fragmentation chain-transfer polymerization), synthetic polymers with narrow polydispersity (Mw/Mn < 1.3) could be obtained at room temperature in 5 minutes. This polymerization strategy enables chain growth to be initiated directly from chain-transfer agents anchored on the surface of live cells using either covalent attachment or non-covalent insertion, while maintaining high cell viability. Compared with conventional grafting-to approaches, these methods significantly improve the efficiency of grafting polymer chains and enable the active manipulation of cellular phenotypes.
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Affiliation(s)
- Jia Niu
- California NanoSystems Institute, University of California, Santa Barbara, California 93106, USA.,Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA
| | - David J Lunn
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA.,Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Anusha Pusuluri
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Justin I Yoo
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Michelle A O'Malley
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Samir Mitragotri
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA.,Center for Bioengineering, University of California, Santa Barbara, California 93106, USA
| | - H Tom Soh
- Department of Radiology, School of Medicine, Stanford University, Stanford, California 94305, USA.,Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA
| | - Craig J Hawker
- California NanoSystems Institute, University of California, Santa Barbara, California 93106, USA.,Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA.,Center for Bioengineering, University of California, Santa Barbara, California 93106, USA.,Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA
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21
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Abbina S, Vappala S, Kumar P, Siren EMJ, La CC, Abbasi U, Brooks DE, Kizhakkedathu JN. Hyperbranched polyglycerols: recent advances in synthesis, biocompatibility and biomedical applications. J Mater Chem B 2017; 5:9249-9277. [DOI: 10.1039/c7tb02515g] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hyperbranched polyglycerol is one of the most widely studied biocompatible dendritic polymer and showed promising applications. Here, we summarized the recent advancements in the field.
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Affiliation(s)
- Srinivas Abbina
- Department of Pathology and Laboratory Medicine
- University of British Columbia
- Vancouver
- Canada
- Center for Blood Research
| | - Sreeparna Vappala
- Department of Pathology and Laboratory Medicine
- University of British Columbia
- Vancouver
- Canada
- Center for Blood Research
| | - Prashant Kumar
- Center for Blood Research
- University of British Columbia
- Vancouver
- Canada
- Department of Chemistry
| | - Erika M. J. Siren
- Center for Blood Research
- University of British Columbia
- Vancouver
- Canada
- Department of Chemistry
| | - Chanel C. La
- Center for Blood Research
- University of British Columbia
- Vancouver
- Canada
- Department of Chemistry
| | - Usama Abbasi
- Department of Pathology and Laboratory Medicine
- University of British Columbia
- Vancouver
- Canada
- Center for Blood Research
| | - Donald E. Brooks
- Department of Pathology and Laboratory Medicine
- University of British Columbia
- Vancouver
- Canada
- Center for Blood Research
| | - Jayachandran N. Kizhakkedathu
- Department of Pathology and Laboratory Medicine
- University of British Columbia
- Vancouver
- Canada
- Center for Blood Research
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22
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Le Y, Toyofuku WM, Scott MD. Immunogenicity of murine mPEG-red blood cells and the risk of anti-PEG antibodies in human blood donors. Exp Hematol 2016; 47:36-47.e2. [PMID: 27864153 DOI: 10.1016/j.exphem.2016.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 10/20/2016] [Accepted: 11/06/2016] [Indexed: 10/20/2022]
Abstract
The immunocamouflage of non-ABO blood group antigens by membrane-grafted methoxypoly(ethylene glycol) (mPEG) may attenuate the risk of red blood cell (RBC) alloimmunization. However, concerns have been raised over the immunogenic risk of PEG and PEG-RBCs. To assess this risk, murine and human studies were performed. Mice were exposed to soluble PEG prior to, or between, multiple transfusions (∼60-day intervals) of control or mPEG-RBCs, and cell survival was determined by flow cytometry. In some studies, the control and mPEG-RBC groups were reversed after one or more transfusions. Furthermore, human blood donors and commercial intravenous immunoglobulin products were examined to detect anti-PEG antibodies and to assess the risk for false positives. Naïve mice receiving chronic mPEG-RBC transfusions had normal RBC survival curves with no evidence of anti-PEG antibodies. Similarly, challenge with soluble PEG did not elicit anti-PEG antibodies in mice. Studies in humans revealed no evidence of a high prevalence of anti-PEG antibodies in either blood donors or commercial intravenous immunoglobulin. However, by use of the methods employed by studies identifying high levels of anti-PEG antibodies, a significant level (∼15%) of "false positives" were detected in commercial antibodies of known (non-PEG) specificities. These findings suggest that methodologic problems yielded a high rate of false positives in these earlier studies. These data continue to support the clinical utility of cellular PEGylation and the low immunogenic risk of grafted mPEG.
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Affiliation(s)
- Yevgeniya Le
- Canadian Blood Services, Vancouver, BC, Canada; Canadian Nuclear Laboratories, Chalk River, ON, Canada
| | - Wendy M Toyofuku
- Canadian Blood Services, Vancouver, BC, Canada; Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
| | - Mark D Scott
- Canadian Blood Services, Vancouver, BC, Canada; Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.
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23
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Li S, Constantinescu I, Guan Q, Kalathottukaren MT, Brooks DE, Nguan CYC, Kizhakkedathu JN, Du C. Advantages of replacing hydroxyethyl starch in University of Wisconsin solution with hyperbranched polyglycerol for cold kidney perfusion. J Surg Res 2016; 205:59-69. [PMID: 27621000 DOI: 10.1016/j.jss.2016.06.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/01/2016] [Accepted: 06/06/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND Efficient and effective perfusion during organ procurement is required for the best prevention of donor organ injury preceding transplantation. However, current organ preservation solutions, including hydroxyethyl starch (HES)-based University of Wisconsin (UW) solution, do not always yield the best outcomes. Our previous study demonstrated that replacing HES with hyperbranched polyglycerol (HPG) reduced donor heart injury during cold storage. The current research was designed to examine the advantages of HPG-based solution for cold kidney perfusion. METHODS Perfusion efficiency of HPG versus UW solution was tested using mouse kidneys at 4°C. The blood washout was evaluated by using a semiquantitative scoring system and tissue damage by histologic analysis. The interaction of HPG or UW solution with human red blood cells (RBCs) was examined by measuring RBC sedimentation and aggregation. RESULTS The lower viscosity of HPG solution was correlated with faster and more efficient perfusion through donor kidneys as compared with UW. HPG solution was also more effective than UW in removing RBCs from the kidney and was associated with less tissue damage to donor kidneys. In vitro UW solution caused significant RBC sedimentation and hyperaggregation, whereas HPG showed minimal impact on RBC sedimentation and prevented RBC aggregation. CONCLUSIONS This experimental study demonstrated that compared with UW, HPG solution was more efficient and effective in the removal of the blood from donor kidneys and offered better protection from donor tissue damage, suggesting that the HPG solution is a promising candidate to supplant standard UW solution for donor kidney perfusion in transplantation.
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Affiliation(s)
- Shadan Li
- Department of Urology, Chengdu Military General Hospital, Chengdu, Sichuan, China; Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Iren Constantinescu
- Department of Pathology and Laboratory Medicine, Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Qiunong Guan
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Manu T Kalathottukaren
- Department of Pathology and Laboratory Medicine, Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Donald E Brooks
- Department of Pathology and Laboratory Medicine, Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada; Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Christopher Y C Nguan
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jayachandran N Kizhakkedathu
- Department of Pathology and Laboratory Medicine, Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada; Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Caigan Du
- Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada.
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24
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Alizadeh Noghani M, Brooks DE. Progesterone binding nano-carriers based on hydrophobically modified hyperbranched polyglycerols. NANOSCALE 2016; 8:5189-5199. [PMID: 26878269 DOI: 10.1039/c5nr08175k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Progesterone (Pro) is a potent neurosteroid and promotes recovery from moderate Traumatic Brain Injury but its clinical application is severely impeded by its poor water solubility. Here we demonstrate that reversibly binding Pro within hydrophobically modified hyperbranched polyglycerol (HPG-Cn-MPEG) enhances its solubility, stability and bioavailability. Synthesis, characterization and Pro loading into HPG-Cn-MPEG is described. The release kinetics are correlated with structural properties and the results of Differential Scanning Calorimetry studies of a family of HPG-Cn-MPEGs of varying molecular weight and alkylation. While the maximum amount of Pro bound correlates well with the amount of alkyl carbon per molecule contributing to its hydrophobicity, the dominant first order rate constant for Pro release correlates strongly with the amount of structured or bound water in the dendritic domain of the polymer. The results provide evidence to justify more detailed studies of interactions with biological systems, both single cells and in animal models.
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Affiliation(s)
- M Alizadeh Noghani
- Centre for Blood Research and Departments of Chemistry, University of British Columbia, Vancouver, BC, Canada V6T 1Z3
| | - D E Brooks
- Centre for Blood Research and Departments of Chemistry, University of British Columbia, Vancouver, BC, Canada V6T 1Z3 and Centre for Blood Research and Departments of Chemistry and of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada V6T 1Z3.
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25
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The mechanism and modulation of complement activation on polymer grafted cells. Acta Biomater 2016; 31:252-263. [PMID: 26593783 DOI: 10.1016/j.actbio.2015.11.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/22/2015] [Accepted: 11/14/2015] [Indexed: 12/15/2022]
Abstract
Cell surface engineering using polymers is a promising approach to address unmet needs and adverse immune reactions in the fields of transfusion, transplantation, and cell-based therapies. Furthermore, cell surface modification may minimize or prevent adverse immune reactions to homologous incompatible cells as the interface between the host immune system and the cell surface is modified. In this report, we investigate the immune system reaction, precisely the complement binding and activation on cell surfaces modified with a functional polymer, hyperbranched polyglycerol (HPG). We used red blood cells (RBCs) as a model system to investigate the mechanism of complement activation on cell surfaces modified with various forms of HPG. Using a battery of in vitro assays including: traditional diagnostic hemolytic assays involving sheep and rabbit erythrocytes, ELISAs and flow cytometry, we show that HPG modified RBCs at certain concentrations and molecular weights activate complement via the alternative pathway. We show that by varying the grafting concentration, molecular weight and the number of cell surface reactive groups of HPG, the complement activity on the cell surface can be modulated. HPGs with molecular weights greater than 28kDa and grafting concentrations greater than 1.0mM, as well as a high degree of HPG functionalization with cell surface reactive groups result in the activation of the complement system via the alternative pathway. No complement activation observed when these threshold levels are not exceeded. These insights may have an impact on devising key strategies in developing novel next generation cell-surface engineered therapeutic products for applications in the fields of cell therapy, transfusion and drug delivery. STATEMENT OF SIGNIFICANCE Cell-surface engineering using functional polymers is a fast emerging area of research. Importantly modified cells are used in many experimental therapeutics, transplantation and in transfusion. The success of such therapies depend on the ability of modified products to avoid immune detection and subsequent rejection or removal. Polymer grafting has been shown to modulate immune response, however, there is limited knowledge available. Thus in this manuscript, we investigated the interaction of human complement, part of our innate immune system, by polymer modified cells. Our results provide important evidences on the mechanism of complement activation by the modified cells and also found ways to modulate the innate immune response. These results will have implications in development of next generation cell-based therapies.
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26
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Zan T, Wu F, Pei X, Jia S, Zhang R, Wu S, Niu Z, Zhang Z. Into the polymer brush regime through the "grafting-to" method: densely polymer-grafted rodlike viruses with an unusual nematic liquid crystal behavior. SOFT MATTER 2016; 12:798-805. [PMID: 26531814 DOI: 10.1039/c5sm02015h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The current work reports an intriguing discovery of how the force exerted on protein complexes like filamentous viruses by the strong interchain repulsion of polymer brushes can induce subtle changes of the constituent subunits at the molecular scale. Such changes transform into the macroscopic rearrangement of the chiral ordering of the rodlike virus in three dimensions. For this, a straightforward "grafting-to" PEGylation method has been developed to densely graft a filamentous virus with poly(ethylene glycol) (PEG). The grafting density is so high that PEG is in the polymer brush regime, resulting in straight and thick rodlike particles with a thin viral backbone. Scission of the densely PEGylated viruses into fragments was observed due to the steric repulsion of the PEG brush, as facilitated by adsorption onto a mica surface. The high grafting density of PEG endows the virus with an isotropic-nematic (I-N) liquid crystal (LC) phase transition that is independent of the ionic strength and the densely PEGylated viruses enter into the nematic LC phase at much lower virus concentrations. Most importantly, while the intact virus and the one grafted with PEG of low grafting density can form a chiral nematic LC phase, the densely PEGylated viruses only form a pure nematic LC phase. This can be traced back to the secondary to tertiary structural change of the major coat protein of the virus, driven by the steric repulsion of the PEG brush. Quantitative parameters characterising the conformation of the grafted PEG derived from the grafting density or the I-N LC transition are elegantly consistent with the theoretical prediction.
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Affiliation(s)
- Tingting Zan
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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27
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Genetically targeted fluorogenic macromolecules for subcellular imaging and cellular perturbation. Biomaterials 2015; 66:1-8. [PMID: 26183934 DOI: 10.1016/j.biomaterials.2015.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 12/17/2022]
Abstract
The alteration of cellular functions by anchoring macromolecules to specified organelles may reveal a new area of therapeutic potential and clinical treatment. In this work, a unique phenotype was evoked by influencing cellular behavior through the modification of subcellular structures with genetically targetable macromolecules. These fluorogen-functionalized polymers, prepared via controlled radical polymerization, were capable of exclusively decorating actin, cytoplasmic, or nuclear compartments of living cells expressing localized fluorgen-activating proteins. The macromolecular fluorogens were optimized by establishing critical polymer architecture-biophysical property relationships which impacted binding rates, binding affinities, and the level of internalization. Specific labeling of subcellular structures was realized at nanomolar concentrations of polymer, in the absence of membrane permeabilization or transduction domains, and fluorogen-modified polymers were found to bind to protein intact after delivery to the cytosol. Cellular motility was found to be dependent on binding of macromolecular fluorogens to actin structures causing rapid cellular ruffling without migration.
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28
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Gao S, Guan Q, Chafeeva I, Brooks DE, Nguan CYC, Kizhakkedathu JN, Du C. Hyperbranched polyglycerol as a colloid in cold organ preservation solutions. PLoS One 2015; 10:e0116595. [PMID: 25706864 PMCID: PMC4338306 DOI: 10.1371/journal.pone.0116595] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 12/12/2014] [Indexed: 12/19/2022] Open
Abstract
Hydroxyethyl starch (HES) is a common colloid in organ preservation solutions, such as in University of Wisconsin (UW) solution, for preventing graft interstitial edema and cell swelling during cold preservation of donor organs. However, HES has undesirable characteristics, such as high viscosity, causing kidney injury and aggregation of erythrocytes. Hyperbranched polyglycerol (HPG) is a branched compact polymer that has low intrinsic viscosity. This study investigated HPG (MW-0.5 to 119 kDa) as a potential alternative to HES for cold organ preservation. HPG was synthesized by ring-opening multibranching polymerization of glycidol. Both rat myocardiocytes and human endothelial cells were used as an in vitro model, and heart transplantation in mice as an in vivo model. Tissue damage or cell death was determined by both biochemical and histological analysis. HPG polymers were more compact with relatively low polydispersity index than HES in UW solution. Cold preservation of mouse hearts ex vivo in HPG solutions reduced organ damage in comparison to those in HES-based UW solution. Both size and concentration of HPGs contributed to the protection of the donor organs; 1 kDa HPG at 3 wt% solution was superior to HES-based UW solution and other HPGs. Heart transplants preserved with HPG solution (1 kDa, 3%) as compared with those with UW solution had a better functional recovery, less tissue injury and neutrophil infiltration in syngeneic recipients, and survived longer in allogeneic recipients. In cultured myocardiocytes or endothelial cells, significantly more cells survived after cold preservation with the HPG solution than those with the UW solution, which was positively correlated with the maintenance of intracellular adenosine triphosphate and cell membrane fluidity. In conclusion, HPG solution significantly enhanced the protection of hearts or cells during cold storage, suggesting that HPG is a promising colloid for the cold storage of donor organs and cells in transplantation.
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Affiliation(s)
- Sihai Gao
- Department of Urologic Sciences, the University of British Columbia, Vancouver, BC, Canada
- Department of Thoracic and Cardiovascular Surgery, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, P.R. China
| | - Qiunong Guan
- Department of Urologic Sciences, the University of British Columbia, Vancouver, BC, Canada
| | - Irina Chafeeva
- Centre for Blood Research, and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Donald E. Brooks
- Centre for Blood Research, and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | | | - Jayachandran N. Kizhakkedathu
- Centre for Blood Research, and the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
- * E-mail: (JNK); (CD)
| | - Caigan Du
- Department of Urologic Sciences, the University of British Columbia, Vancouver, BC, Canada
- * E-mail: (JNK); (CD)
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Wang S, Li L, Liu Y, Li C, Zhang M, Wang B, Huang Z, Gao X, Wang Z. Treatment with mPEG-SPA improves the survival of corneal grafts in rats by immune camouflage. Biomaterials 2015; 43:13-22. [PMID: 25591957 DOI: 10.1016/j.biomaterials.2014.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Revised: 09/04/2014] [Accepted: 12/01/2014] [Indexed: 11/18/2022]
Abstract
We investigated the immune camouflage effects of methoxy polyethylene glycol succinimidyl propionate (mPEG-SPA) on corneal antigens and explored a novel approach for reducing corneal antigenicity, thereby decreasing corneal graft rejection. Importantly, this approach did not alter normal local immunity. Corneal grafts were treated with mPEG-SPA 5KD or 20KD (3% W/V), which could shield major histocompatibility antigen class I molecules (RT1-A) of corneal grafts. Skin grafts of Wistar rats were transplanted to SD rats. Then the splenic lymphocytes were isolated from SD rats. Subsequently, the lymphocytes were co-cultured with autologous corneal grafts or untreated corneal grafts and PEGylated grafts treated with mPEG-SPA 5KD or 20KD obtained from the counterpart skin donors, which were used as autologous control, allogeneic control, mPEG-SPA 5KD group and mPEG-SPA 20KD group, respectively. Lymphocyte proliferation was lower in mPEG-SPA 5KD group and mPEG-SPA 20KD group than in the allogeneic control. SD rats with corneal neovascularisation were used as recipients for high-risk corneal transplantation and were randomly divided into four groups: autologous control, allogeneic control, mPEG-SPA 5KD group and mPEG-SPA 20KD group. The recipients received corneal grafts from Wistar rats. Corneal graft survival was prolonged and graft rejection was reduced in the mPEG-SPA 5KD group and the mPEG-SPA 20KD group compared to the allogeneic control. Thus, we think that mPEG-SPA could immunologically camouflage corneal antigens to prolong corneal grafts survival in high-risk transplantation.
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Affiliation(s)
- Shuangyong Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Liangliang Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Ying Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Chaoyang Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Min Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Bowen Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Zheqian Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Xinbo Gao
- Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Zhichong Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, People's Republic of China.
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Amaral AJR, Pasparakis G. Macromolecular cell surface engineering for accelerated and reversible cellular aggregation. Chem Commun (Camb) 2015; 51:17556-9. [DOI: 10.1039/c5cc07001e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two simple cell membrane interacting copolymers are reported that induce rapid cell aggregation and act as self-supporting “cellular glues” at minute concentrations.
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31
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Chapanian R, Kwan DH, Constantinescu I, Shaikh FA, Rossi NAA, Withers SG, Kizhakkedathu JN. Enhancement of biological reactions on cell surfaces via macromolecular crowding. Nat Commun 2014; 5:4683. [PMID: 25140641 PMCID: PMC4978540 DOI: 10.1038/ncomms5683] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 07/11/2014] [Indexed: 12/18/2022] Open
Abstract
The reaction of macromolecules such as enzymes and antibodies with cell surfaces is often an inefficient process, requiring large amounts of expensive reagent. Here we report a general method based on macromolecular crowding with a range of neutral polymers to enhance such reactions, using red blood cells (RBCs) as a model system. Rates of conversion of type A and B red blood cells to universal O type by removal of antigenic carbohydrates with selective glycosidases are increased up to 400-fold in the presence of crowders. Similar enhancements are seen for antibody binding. We further explore the factors underlying these enhancements using confocal microscopy and fluorescent recovery after bleaching (FRAP) techniques with various fluorescent protein fusion partners. Increased cell-surface concentration due to volume exclusion, along with two-dimensionally confined diffusion of enzymes close to the cell surface, appear to be the major contributing factors.
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Affiliation(s)
- Rafi Chapanian
- 1] Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, British Columbia, Canada V6T 1Z3 [2] Department of Pathology and Laboratory Medicine, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, British Columbia, Canada V6T 1Z3
| | - David H Kwan
- 1] Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1 [2] Centre for High-Throughput Biology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3
| | - Iren Constantinescu
- Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, British Columbia, Canada V6T 1Z3
| | - Fathima A Shaikh
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Nicholas A A Rossi
- Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, British Columbia, Canada V6T 1Z3
| | - Stephen G Withers
- 1] Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1 [2] Centre for High-Throughput Biology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3 [3] Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3
| | - Jayachandran N Kizhakkedathu
- 1] Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, British Columbia, Canada V6T 1Z3 [2] Department of Pathology and Laboratory Medicine, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, British Columbia, Canada V6T 1Z3 [3] Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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Koo S, Yang Y, Neu B. Poloxamer 188 reduces normal and phosphatidylserine-exposing erythrocyte adhesion to endothelial cells in dextran solutions. Colloids Surf B Biointerfaces 2013; 112:446-51. [DOI: 10.1016/j.colsurfb.2013.07.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 06/29/2013] [Accepted: 07/16/2013] [Indexed: 12/17/2022]
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33
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Schüll C, Frey H. Grafting of hyperbranched polymers: From unusual complex polymer topologies to multivalent surface functionalization. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.07.065] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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34
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Shenoi RA, Lai BF, Imran ul-haq M, Brooks DE, Kizhakkedathu JN. Biodegradable polyglycerols with randomly distributed ketal groups as multi-functional drug delivery systems. Biomaterials 2013; 34:6068-81. [DOI: 10.1016/j.biomaterials.2013.04.043] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 04/23/2013] [Indexed: 11/29/2022]
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35
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ul-haq MI, Shenoi RA, Brooks DE, Kizhakkedathu JN. Solvent-assisted anionic ring opening polymerization of glycidol: Toward medium and high molecular weight hyperbranched polyglycerols. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26649] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Muhammad Imran ul-haq
- Department of Pathology and Laboratory Medicine; Centre for Blood Research; The University of British Columbia, Life Sciences Centre, 2350 Health Sciences Mall; Vancouver; BC; V6T 1Z3; Canada
| | - Rajesh A. Shenoi
- Department of Pathology and Laboratory Medicine; Centre for Blood Research; The University of British Columbia, Life Sciences Centre, 2350 Health Sciences Mall; Vancouver; BC; V6T 1Z3; Canada
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36
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Chapanian R, Constantinescu I, Brooks DE, Scott MD, Kizhakkedathu J. Antigens protected functional red blood cells by the membrane grafting of compact hyperbranched polyglycerols. J Vis Exp 2013:50075. [PMID: 23328980 DOI: 10.3791/50075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Red blood cell (RBC) transfusion is vital for the treatment of a number of acute and chronic medical problems such as thalassemia major and sickle cell anemia. Due to the presence of multitude of antigens on the RBC surface (~308 known antigens), patients in the chronic blood transfusion therapy develop alloantibodies due to the miss match of minor antigens on transfused RBCs. Grafting of hydrophilic polymers such as polyethylene glycol (PEG) and hyperbranched polyglycerol (HPG) forms an exclusion layer on RBC membrane that prevents the interaction of antibodies with surface antigens without affecting the passage of small molecules such as oxygen, glucose, and ions. At present no method is available for the generation of universal red blood donor cells in part because of the daunting challenge presented by the presence of large number of antigens (protein and carbohydrate based) on the RBC surface and the development of such methods will significantly improve transfusion safety, and dramatically improve the availability and use of RBCs. In this report, the experiments that are used to develop antigen protected functional RBCs by the membrane grafting of HPG and their characterization are presented. HPGs are highly biocompatible compact polymers, and are expected to be located within the cell glycocalyx that surrounds the lipid membrane and mask RBC surface antigens.
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Affiliation(s)
- Rafi Chapanian
- Centre for Blood Research, University of British Columbia
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37
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Shenoi RA, Lai BFL, Kizhakkedathu JN. Synthesis, Characterization, and Biocompatibility of Biodegradable Hyperbranched Polyglycerols from Acid-Cleavable Ketal Group Functionalized Initiators. Biomacromolecules 2012; 13:3018-30. [DOI: 10.1021/bm300959h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Rajesh A. Shenoi
- Centre for Blood Research and
Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver BC, Canada V6T 1Z3
| | - Benjamin F. L. Lai
- Centre for Blood Research and
Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver BC, Canada V6T 1Z3
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood Research and
Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver BC, Canada V6T 1Z3
- Department of Chemistry, University of British Columbia, Vancouver BC, Canada
V6T 1Z3
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38
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Chapanian R, Constantinescu I, Rossi NAA, Medvedev N, Brooks DE, Scott MD, Kizhakkedathu JN. Influence of polymer architecture on antigens camouflage, CD47 protection and complement mediated lysis of surface grafted red blood cells. Biomaterials 2012; 33:7871-83. [PMID: 22840223 DOI: 10.1016/j.biomaterials.2012.07.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 07/06/2012] [Indexed: 11/17/2022]
Abstract
Hyperbranched polyglycerol (HPG) and polyethylene glycol (PEG) polymers with similar hydrodynamic sizes in solution were grafted to red blood cells (RBCs) to investigate the impact of polymer architecture on the cell structure and function. The hydrodynamic sizes of polymers were calculated from the diffusion coefficients measured by pulsed field gradient NMR. The hydration of the HPG and PEG was determined by differential scanning calorimetry analyses. RBCs grafted with linear PEG had different properties compared to the compact HPG grafted RBCs. HPG grafted RBCs showed much higher electrophoretic mobility values than PEG grafted RBCs at similar grafting concentrations and hydrodynamic sizes indicating differences in the structure of the polymer exclusion layer on the cell surface. PEG grafting impacted the deformation properties of the membrane to a greater degree than HPG. The complement mediated lysis of the grafted RBCs was dependent on the type of polymer, grafting concentration and molecular size of grafted chains. At higher molecular weights and graft concentrations both HPG and PEG triggered complement activation. The magnitude of activation was higher with HPG possibly due to the presence of many hydroxyl groups per molecule. HPG grafted RBCs showed significantly higher levels of CD47 self-protein accessibility than PEG grafted RBCs at all grafting concentrations and molecular sizes. PEG grafted polymers provided, in general, a better shielding and protection to ABO and minor antigens from antibody recognition than HPG polymers, however, the compact HPGs provided greater protection of certain antigens on the RBC surface. Our data showed that HPG 20 kDa and HPG 60 kDa grafted RBCs exhibited properties that are more comparable to the native RBC than PEG 5 kDa and PEG 10 kDa grafted RBCs of comparable hydrodynamic sizes. The study shows that small compact polymers such as HPG 20 kDa have a greater potential in the generation of functional RBC for therapeutic delivery applications. The intermediate sized polymers (PEG or HPG) which showed greater antigen camouflage at lower grafting concentrations have significant potential in transfusion as universal red blood donor cells.
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Affiliation(s)
- Rafi Chapanian
- Centre for Blood Research, University of British Columbia, Vancouver, BC, Canada
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39
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Interactions between solubilized polymer molecules and blood components. J Control Release 2012; 160:14-24. [DOI: 10.1016/j.jconrel.2012.02.005] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 02/01/2012] [Indexed: 12/19/2022]
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40
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Saatchi K, Soema P, Gelder N, Misri R, McPhee K, Baker JH, Reinsberg SA, Brooks DE, Häfeli UO. Hyperbranched Polyglycerols as Trimodal Imaging Agents: Design, Biocompatibility, and Tumor Uptake. Bioconjug Chem 2012; 23:372-81. [DOI: 10.1021/bc200280g] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Katayoun Saatchi
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Peter Soema
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Nikolaus Gelder
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Ripen Misri
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Kelly McPhee
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Jennifer H.E. Baker
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Stefan A. Reinsberg
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Donald E. Brooks
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
| | - Urs O. Häfeli
- Faculty
of Pharmaceutical Sciences, ‡Department of Physics, and §Centre for Blood Research, University of British Columbia, Vancouver,
British Columbia, Canada
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41
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Wang D, Toyofuku WM, Scott MD. The potential utility of methoxypoly(ethylene glycol)-mediated prevention of rhesus blood group antigen RhD recognition in transfusion medicine. Biomaterials 2012; 33:3002-12. [PMID: 22264524 DOI: 10.1016/j.biomaterials.2011.12.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 12/20/2011] [Indexed: 10/14/2022]
Abstract
Red blood cell (RBC) transfusions are an important clinical intervention. However, RBC express hundreds of non-ABO antigens making alloimmunization a significant risk. RhD expression is the most immunologically important non-ABO antigen. Availability of RhD(-) blood, often problematic in North America and Europe, is a significant issue in Asia and Africa where RhD(-) blood is uncommon (<0.5% of supply). The immunocamouflage of RhD is readily accomplished by the covalent grafting of methoxypoly(ethylene glycol) [mPEG] to the RBC membrane. To determine if RhD immunocamouflage would inhibit its immunologic recognition, an in vitro RhD-sensitized antigen presentation assay using PBMC and dendritic cells (DC) from RhD-sensitized women was used. The immunological effects of polymer grafting to an immunodominant RhD peptide, purified RhD protein and intact RhD(+) RBC were examined via T cell proliferation and cytokine release assays. At Day 11, PEGylation significantly attenuated T cell proliferation arising from RhD peptide (~80 → 5%), protein (36 → 0.2%) and intact RBC (33 → 1.4%). Cytokine secretion was similarly blunted following PEGylation of the purified protein or intact RBC. These data support the immunomodulatory effects of PEGylation and the potential utility of this technology in transfusion medicine - especially in situations where RhD(-) blood is rare or in short supply.
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42
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In vivo circulation, clearance, and biodistribution of polyglycerol grafted functional red blood cells. Biomaterials 2012; 33:3047-57. [PMID: 22261097 DOI: 10.1016/j.biomaterials.2011.12.053] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Accepted: 12/31/2011] [Indexed: 11/23/2022]
Abstract
The in vivo circulation of hyperbranched polyglycerol (HPG) grafted red blood cells (RBCs) was investigated in mice. The number of HPG molecules grafted per RBC was measured using tritium labeled HPGs ((3)H-HPG) of different molecular weights; the values ranged from 1 × 10(5) to 2 × 10(6) molecules per RBC. HPG-grafted RBCs were characterized in vitro by measuring the electrophoretic mobility, complement mediated lysis, and osmotic fragility. Our results show that RBCs grafted with 1.5 × 10(5) HPG molecules per RBC having molecular weights 20 and 60 kDa have similar characteristics as that of control RBCs. The in vivo circulation of HPG-grafted RBCs was measured by a tail vain injection of (3)H-HPG60K-RBC in mice. The radioactivity of isolated RBCs, whole blood, plasma, different organs, urine and feces was evaluated at different time intervals. The portion of (3)H-HPG60K-RBC that survived the first day in mice (52%) remained in circulation for 50 days. Minimal accumulation radioactivity in organs other than liver and spleen was observed suggesting the normal clearance mechanism of modified RBCs. Animals gained normal weights and no abnormalities observed in necropsy analysis. The stability of the ester-amide linker between the RBC and HPG was evaluated by comparing the clearance rate of (3)H-HPG60K-RBC and PKH-26 lipid fluorescent membrane marker labeled HPG60K-RBCs. HPG modified RBCs combine the many advantages of a dendritic polymer and RBCs, and hold great promise in systemic drug delivery and other applications of functional RBC.
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Rodriguez-Emmenegger C, Hasan E, Pop-Georgievski O, Houska M, Brynda E, Alles AB. Controlled/Living Surface-Initiated ATRP of Antifouling Polymer Brushes from Gold in PBS and Blood Sera as a Model Study for Polymer Modifications in Complex Biological Media. Macromol Biosci 2012; 12:525-32. [DOI: 10.1002/mabi.201100425] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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44
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Wang D, Toyofuku WM, Chen AM, Scott MD. Induction of immunotolerance via mPEG grafting to allogeneic leukocytes. Biomaterials 2011; 32:9494-503. [DOI: 10.1016/j.biomaterials.2011.08.061] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Accepted: 08/19/2011] [Indexed: 11/16/2022]
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45
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46
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Greco CA, Maurer-Spurej E, Scott MD, Kalab M, Nakane N, Ramírez-Arcos SM. PEGylation prevents bacteria-induced platelet activation and biofilm formation in platelet concentrates. Vox Sang 2010; 100:336-9. [PMID: 21392023 DOI: 10.1111/j.1423-0410.2010.01419.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bacterial contamination of platelet concentrates represents the greatest post-transfusion infectious risk. Biofilm formation in this environment resulting from platelet-bacteria interactions can lead to non-uniform contaminant distribution and thus missed detection. As formation of platelet-bacteria aggregates is largely based on receptor-ligand interactions, we examined whether shielding these events would result in reduced biofilm formation by contaminant bacteria. We introduced methoxypoly(ethylene glycol) to covalently modify the platelet surface using a process termed 'PEGylation'. In the first study of its kind, we demonstrate that PEGylated platelet concentrates inoculated with Staphylococcus epidermidis display a significant reduction in bacterial binding and biofilm formation.
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Affiliation(s)
- C A Greco
- Canadian Blood Services, Ottawa, Ontario, Canada
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47
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Kizhakkedathu JN, Creagh AL, Shenoi RA, Rossi NAA, Brooks DE, Chan T, Lam J, Dandepally SR, Haynes CA. High Molecular Weight Polyglycerol-Based Multivalent Mannose Conjugates. Biomacromolecules 2010; 11:2567-75. [DOI: 10.1021/bm1004788] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jayachandran N. Kizhakkedathu
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - A. Louise Creagh
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Rajesh A. Shenoi
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nicholas A. A. Rossi
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Donald E. Brooks
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Timmy Chan
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jonathan Lam
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Srinivasa R. Dandepally
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles A. Haynes
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, Michael Smith Laboratories, Department of Chemical and Biological Engineering, and Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
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