1
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Wang Q, Zhang D, Feng J, Sun T, Li C, Xie X, Shi Q. Enhanced photodynamic inactivation for Gram-negative bacteria by branched polyethylenimine-containing nanoparticles under visible light irradiation. J Colloid Interface Sci 2020; 584:539-550. [PMID: 33129163 DOI: 10.1016/j.jcis.2020.09.106] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/22/2020] [Accepted: 09/26/2020] [Indexed: 12/29/2022]
Abstract
Antibiotic pollution has been a serious global public health concern in recent years, photodynamic inactivation is one of the most promising and innovative methods for antibacterial applications that avoids antibiotic abuse and minimizes risks of antibiotic resistance. However, limited by the weak interaction between the photosensitizers and Gram-negative bacteria, the effect of photodynamic inactivation cannot be fully exerted. Herein, photosensitizer chlorin e6-loaded polyethyleneimine-based micelle was constructed. The synergy of electrostatic and hydrophobic interactions between the nanoparticles and the bacterial surface promoted the anchoring of nanoparticles onto the bacteria, resulting in enhanced photoinactivation activities on Gram-negative bacteria. As expected, an eminent antibacterial effect was also observed on the Gram-positive bacteria Staphylococcus aureus. The cellular uptake results showed that photosensitizer was firmly anchored to the bacterial cell surface of Escherichia coli or Staphylococcus aureus by the introduction of branched polyethylenimine-containing nanoparticles. The light-triggered generation of reactive oxygen species, mainly singlet oxygen, from the membrane-bound nanoparticles caused irreversible damage to the bacterial outer membrane, achieving enhanced bactericidal efficiency than free photosensitizer. The study would provide an efficient and promising antimicrobial alternative to prevent overuse of antibiotics and have enormous potential for human healthcare and the environment remediation.
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Affiliation(s)
- Qian Wang
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Dandan Zhang
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Jin Feng
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Tingli Sun
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Cailing Li
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China
| | - Xiaobao Xie
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China.
| | - Qingshan Shi
- Guangdong Institute of Microbiology, Guangdong Academy of Sciences, State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangzhou 510070, PR China.
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2
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Jia HR, Zhu YX, Xu KF, Liu X, Wu FG. Plasma membrane-anchorable photosensitizing nanomicelles for lipid raft-responsive and light-controllable intracellular drug delivery. J Control Release 2018; 286:103-113. [PMID: 30026079 DOI: 10.1016/j.jconrel.2018.07.027] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/10/2018] [Accepted: 07/15/2018] [Indexed: 01/11/2023]
Abstract
The past decade has witnessed a growing number of nanoparticulate drug delivery systems for cancer treatment. However, insufficient cellular uptake by cancer cells and the undesirable endo/lysosomal entrapment of internalized therapeutic drugs remain the "Achilles heel" of many developed nanoagents. Here, we develop a novel lipid raft-responsive and light-controllable polymeric drug for efficient cytosolic delivery of photosensitizers. Conjugating a photosensitizer protoporphyrin IX (PpIX) to a polyethylene glycol-cholesterol polymer affords the amphiphilic drug (denoted as Chol-PEG-PpIX) that forms micelles in aqueous solutions. The Chol-PEG-PpIX with two hydrophobic units (cholesterol and PpIX) showed robust binding to plasma membranes and enabled significant cellular uptake via two pathways: (1) cholesterol moiety triggered the lipid raft-mediated endocytosis of Chol-PEG-PpIX with minimized endo/lysosomal trafficking after internalization; (2) the membrane-bound PpIX acted as a light-controlled trigger and can augment the permeability of plasma membranes upon laser irradiation, allowing the rapid influx of extracellular Chol-PEG-PpIX within 5 min. For systemic drug delivery, Chol-PEG-PpIX was anchored on the surface of liposomes via in situ membrane modification, which substantially avoided nonspecific binding of Chol-PEG-PpIX to red blood cells during circulation. Besides, the Chol-PEG-PpIX-anchored liposomes exhibited enhanced in vivo fluorescence, reduced liver uptake, prolonged tumor retention, and effective tumor ablation by photodynamic therapy. This work illustrates a new strategy for direct and efficient cytosolic delivery of photosensitizers, which may hold great promise in cancer therapy.
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Affiliation(s)
- Hao-Ran Jia
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, PR China
| | - Ya-Xuan Zhu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, PR China
| | - Ke-Fei Xu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, PR China
| | - Xiaoyang Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, PR China
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, PR China.
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3
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Chai Z, Hu X, Wei X, Zhan C, Lu L, Jiang K, Su B, Ruan H, Ran D, Fang RH, Zhang L, Lu W. A facile approach to functionalizing cell membrane-coated nanoparticles with neurotoxin-derived peptide for brain-targeted drug delivery. J Control Release 2017; 264:102-111. [DOI: 10.1016/j.jconrel.2017.08.027] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/20/2017] [Accepted: 08/22/2017] [Indexed: 12/21/2022]
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4
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Wang HY, Sun J, Xia LY, Li YH, Chen Z, Wu FG. Permeabilization-Tolerant Plasma Membrane Imaging Reagent Based on Amine-Rich Glycol Chitosan Derivatives. ACS Biomater Sci Eng 2017; 3:2570-2578. [DOI: 10.1021/acsbiomaterials.7b00448] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong-Yin Wang
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Jie Sun
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Liu-Yuan Xia
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Yan-Hong Li
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, P. R. China
| | - Zhan Chen
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Fu-Gen Wu
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing 210096, P. R. China
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5
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Plasma membrane activatable polymeric nanotheranostics with self-enhanced light-triggered photosensitizer cellular influx for photodynamic cancer therapy. J Control Release 2017; 255:231-241. [DOI: 10.1016/j.jconrel.2017.04.030] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 04/22/2017] [Indexed: 01/09/2023]
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6
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Jia HR, Zhu YX, Chen Z, Wu FG. Cholesterol-Assisted Bacterial Cell Surface Engineering for Photodynamic Inactivation of Gram-Positive and Gram-Negative Bacteria. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15943-15951. [PMID: 28426936 DOI: 10.1021/acsami.7b02562] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Antibacterial photodynamic therapy (PDT), which enables effective killing of regular and multidrug-resistant (MDR) bacteria, is a promising treatment modality for bacterial infection. However, because most photosensitizer (PS) molecules fail to strongly interact with the surface of Gram-negative bacteria, this technique is suitable for treating only Gram-positive bacterial infection, which largely hampers its practical applications. Herein, we reveal for the first time that cholesterol could significantly facilitate the hydrophobic binding of PSs to the bacterial surface, achieving the hydrophobic interaction-based bacterial cell surface engineering that could effectively photoinactivate both Gram-negative and Gram-positive bacteria. An amphiphilic polymer composed of a polyethylene glycol (PEG) segment terminated with protoporphyrin IX (PpIX, an anionic PS) and cholesterol was constructed (abbreviated Chol-PEG-PpIX), which could self-assemble into micelle-like nanoparticles (NPs) in aqueous solution. When encountering the Gram-negative Escherichia coli cells, the Chol-PEG-PpIX NPs would disassemble and the PpIX moieties could effectively bind to the bacterial surface with the help of the cholesterol moieties, resulting in the significantly enhanced fluorescence emission of the bacterial surface. Under white light irradiation, the light-triggered singlet oxygen (1O2) generation of the membrane-bound PpIX could not only severely damage the outer membrane but also facilitate the entry of external Chol-PEG-PpIX into the bacteria, achieving >99.99% bactericidal efficiency. Besides, as expected, the Chol-PEG-PpIX NPs also exhibited excellent antibacterial performance against the Gram-positive Staphylococcus aureus. We also verified that this nanoagent possesses negligible dark cytotoxicity toward mammalian cells and good hemocompatibility. To the best of our knowledge, this study demonstrates for the first time the feasibility of constructing a fully hydrophobic interaction-based and outer membrane-anchored antibacterial PDT nanoagent.
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Affiliation(s)
- Hao-Ran Jia
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, People's Republic of China
| | - Ya-Xuan Zhu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, People's Republic of China
| | - Zhan Chen
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, People's Republic of China
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7
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Li C, Takeo M, Matsuda M, Nagai H, Xizheng S, Hatanaka W, Kishimura A, Inoue H, Tani K, Mori T, Katayama Y. Facilitating the presentation of antigen peptides on dendritic cells for cancer immunotherapy using a polymer-based synthetic receptor. MEDCHEMCOMM 2017; 8:1207-1212. [PMID: 30108830 DOI: 10.1039/c7md00188f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 05/08/2017] [Indexed: 11/21/2022]
Abstract
The introduction of proteins into dendritic cells (DCs) ex vivo is a critical step for the DC-based immunotherapy of cancer. Here, we developed a biotin-modified polymer with multiple hydrophobic membrane anchors for cells that functions as a synthetic receptor for an antigen protein, ovalbumin (OVA), to introduce it efficiently into DCs compared with the conventional pulsing method. Our method showed significant advantages, including the rapid incorporation of OVA and the activation of antigen-specific T cells in a MHC-restricted manner. When mice were immunized by DCs treated with our method, tumor growth was completely suppressed, indicating that our method can be used to prepare adjuvant DCs.
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Affiliation(s)
- Cuicui Li
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850
| | - Masafumi Takeo
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850
| | - Masayoshi Matsuda
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850
| | - Hiroko Nagai
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850
| | - Sun Xizheng
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850
| | - Wataru Hatanaka
- Department of Applied Chemistry , Faculty of Engineering , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan
| | - Akihiro Kishimura
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850.,Department of Applied Chemistry , Faculty of Engineering , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan.,Center for Advanced Medical Innovation , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan.,International Research Center for Molecular Systems , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan
| | - Hiroyuki Inoue
- Division of Molecular and Clinical Genetics , Medical Institute of Bioregulation , Kyushu University , Fukuoka , Japan
| | - Kenzaburo Tani
- Division of Molecular and Clinical Genetics , Medical Institute of Bioregulation , Kyushu University , Fukuoka , Japan
| | - Takeshi Mori
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850.,Department of Applied Chemistry , Faculty of Engineering , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan.,Center for Advanced Medical Innovation , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan
| | - Yoshiki Katayama
- Graduate School of Systems Life Sciences , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan . ; Tel: +81 092 802 2850.,Department of Applied Chemistry , Faculty of Engineering , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan.,Center for Advanced Medical Innovation , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan.,International Research Center for Molecular Systems , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan.,Center for Advanced Medical Innovation , Kyushu University , 744 Motooka, Nishi-Ku , Fukuoka 819-0395 , Japan.,Department of Biomedical Engineering , Chung Yuan Christian University , 200 Chung Pei Road, Chung Li District , Taoyuan 32023 , Taiwan
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8
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Hatanaka W, Kawaguchi M, Sun X, Nagao Y, Ohshima H, Hashida M, Higuchi Y, Kishimura A, Katayama Y, Mori T. Use of Membrane Potential to Achieve Transmembrane Modification with an Artificial Receptor. Bioconjug Chem 2017; 28:296-301. [DOI: 10.1021/acs.bioconjchem.6b00449] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | | | | | | | - Hiroyuki Ohshima
- Faculty
of
Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8501, Japan
| | - Mitsuru Hashida
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Yuriko Higuchi
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
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9
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Wang HY, Hua XW, Jia HR, Li C, Lin F, Chen Z, Wu FG. Universal Cell Surface Imaging for Mammalian, Fungal, and Bacterial Cells. ACS Biomater Sci Eng 2016; 2:987-997. [DOI: 10.1021/acsbiomaterials.6b00130] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Hong-Yin Wang
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Xian-Wu Hua
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Hao-Ran Jia
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Chengcheng Li
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Fengming Lin
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, P. R. China
| | - Zhan Chen
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan, United States
| | - Fu-Gen Wu
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, P. R. China
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10
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Wang HY, Hua XW, Jia HR, Liu P, Gu N, Chen Z, Wu FG. Enhanced cell membrane enrichment and subsequent cellular internalization of quantum dots via cell surface engineering: illuminating plasma membranes with quantum dots. J Mater Chem B 2016; 4:834-843. [DOI: 10.1039/c5tb02183a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Through hydrophobic interaction-based cell surface engineering, enhanced plasma membrane enrichment and subsequent cellular internalization of quantum dots were achieved.
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Affiliation(s)
- Hong-Yin Wang
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Xian-Wu Hua
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Hao-Ran Jia
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Peidang Liu
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Ning Gu
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
| | - Zhan Chen
- Department of Chemistry
- University of Michigan
- Ann Arbor
- USA
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
- P. R. China
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11
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Takeo M, Li C, Matsuda M, Nagai H, Hatanaka W, Yamamoto T, Kishimura A, Mori T, Katayama Y. Optimum design of amphiphilic polymers bearing hydrophobic groups for both cell surface ligand presentation and intercellular cross-linking. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:353-68. [PMID: 25597323 DOI: 10.1080/09205063.2015.1007414] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Amphiphilic polymers bearing hydrophobic alkyl groups are expected to be applicable for both ligand presentation on the cell surface and intercellular crosslinking. To explore the optimum design for each application, we synthesized eight different acyl-modified dextrans with varying molecular weight, alkyl length, and alkyl modification degree. We found that the behenate-modified polymers retained on the cell surface longer than the palmitate-modified ones. Since the polymers were also modified with biotin, streptavidin can be presented on the cell surface through biotin-streptavidin recognition. The duration of streptavidin on the cell surface is longer in the behenate-modified polymer than the palmitate-modified one. As for the intercellular crosslinking, the palmitate-modified polymers were more efficient than the behenate-modified polymers. The findings in this research will be helpful to design the acyl-modified polymers for the cell surface engineering.
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Affiliation(s)
- Masafumi Takeo
- a Graduate School of System Life Science , Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395 , Japan
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12
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Matsuda M, Hatanaka W, Takeo M, Kim CW, Niidome T, Yamamoto T, Kishimura A, Mori T, Katayama Y. Short peptide motifs for long-lasting anchoring to the cell surface. Bioconjug Chem 2014; 25:2134-43. [PMID: 25350362 DOI: 10.1021/bc500465j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A rational design strategy has been developed for the construction of stable peptide-based anchors for the efficient modification of cell surfaces. Six types of peptide composed of five residues with divalent hydrophobic groups have been designed using this new strategy. Among them, a peptide with a sequence of NBD-Lys-Lys(X)-Lys-Lys-Lys(X)-NH2 (NBD: fluorophore, Lys(X): N-ε-palmitoyl-l-lysine) was found to show the highest modification efficacy and longevity in culture medium. The good performance of this peptide was attributed to (1) its high aqueous solubility, which allowed it to partition from the medium to the cell surface, and (2) the high binding affinity of the saturated palmitoyl groups to the cell membrane. We found that the distribution of the peptide was affected by recycling endosome, which enabled the representation of the peptide following its endocytotic disappearance from the cell membrane. Biotin was also presented on the cell surface using this peptide-based anchor to examine its recognition by streptavidin. The efficacy of the recognition process increased as the length of the oligoethylene glycol spacer increased, indicating that it was necessary for the biotin tag to move away from the membrane glycoproteins on the cell surface to facilitate its efficient recognition by streptavidin.
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Affiliation(s)
- Masayoshi Matsuda
- Graduate School of Systems Life Science, ‡Department of Applied Chemistry, §Center for Future Chemistry, and ∥Center for Molecular Systems, Kyushu University , 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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13
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Ramburrun P, Kumar P, Choonara YE, Bijukumar D, du Toit LC, Pillay V. A review of bioactive release from nerve conduits as a neurotherapeutic strategy for neuronal growth in peripheral nerve injury. BIOMED RESEARCH INTERNATIONAL 2014; 2014:132350. [PMID: 25143934 PMCID: PMC4131113 DOI: 10.1155/2014/132350] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 05/04/2014] [Indexed: 02/07/2023]
Abstract
Peripheral nerve regeneration strategies employ the use of polymeric engineered nerve conduits encompassed with components of a delivery system. This allows for the controlled and sustained release of neurotrophic growth factors for the enhancement of the innate regenerative capacity of the injured nerves. This review article focuses on the delivery of neurotrophic factors (NTFs) and the importance of the parameters that control release kinetics in the delivery of optimal quantities of NTFs for improved therapeutic effect and prevention of dose dumping. Studies utilizing various controlled-release strategies, in attempt to obtain ideal release kinetics, have been reviewed in this paper. Release strategies discussed include affinity-based models, crosslinking techniques, and layer-by-layer technologies. Currently available synthetic hollow nerve conduits, an alternative to the nerve autografts, have proven to be successful in the bridging and regeneration of primarily the short transected nerve gaps in several patient cases. However, current research emphasizes on the development of more advanced nerve conduits able to simulate the effectiveness of the autograft which includes, in particular, the ability to deliver growth factors.
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Affiliation(s)
- Poornima Ramburrun
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Yahya E. Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Divya Bijukumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Lisa C. du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
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