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Rastogi M, Saha RN, Alexander A, Singhvi G, Puri A, Dubey SK. Role of stealth lipids in nanomedicine-based drug carriers. Chem Phys Lipids 2021; 235:105036. [PMID: 33412151 DOI: 10.1016/j.chemphyslip.2020.105036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 12/21/2020] [Accepted: 12/27/2020] [Indexed: 02/01/2023]
Abstract
The domain of nanomedicine owns a wide-ranging variety of lipid-based drug carriers, and novel nanostructured drug carriersthat are further added to this range every year. The primary goal behind the exploration of any new lipid-based nanoformulation is the improvement of the therapeutic index of the concerned drug molecule along with minimization in the associated side-effects. However, for maintaining a sustained delivery of these intravenously injected lipoidal nanomedicines to the targeted tissues and organ systems in the body, longer circulation in the bloodstream, as well as their stability, are important. After administration, upon recognition as foreign entities in the body, these systems are rapidly cleared by the cells associated with the mononuclear phagocyte system. In order to provide these lipid-based systems with long circulation characteristics, techniques such as coating of the lipoidal surface with an inert polymeric material like polyethylene glycol (PEG) assists in imparting 'stealth properties' to these nanoformulations for avoiding recognition by the macrophages of the immune system. In this review, detailed importance is given to the hydrophilic PEG polymer and the role played by PEG-linked lipid polymers in the field of nanomedicine-based drug carriers. The typical structure and classification of stealth lipids, clinical utility, assemblage techniques, physicochemical characterization, and factors governing the in-vivo performance of the PEG-linked lipids containing formulations will be discussed. Eventually, the novel concept of accelerated blood clearance (ABC) phenomenon associated with the use of PEGylated therapeutics will be deliberated.
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Affiliation(s)
- Mehak Rastogi
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Ranendra Narayan Saha
- Department of Biotechnology, Birla Institute of Technology and Science, Pilani (BITS-PILANI), Dubai Campus, Dubai, United Arab Emirates
| | - Amit Alexander
- Department of Pharmaceutical Technology (Formulation), National Institute of Pharmaceutical Education and Research (NIPER-Guwahati), Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Govt. of India, Sila Katamur (Halugurisuk), Changsari, Kamrup, 781101, Guwahati, Assam, India.
| | - Gautam Singhvi
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan, 333031, India
| | - Anu Puri
- RNA Structure and Design Section, RNA Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD, USA.
| | - Sunil Kumar Dubey
- Department of Pharmacy, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan, 333031, India; Emami Limited, R&D Healthcare Division, 13, BT Road, Kolkata, 700 056, West Bengal, India.
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Wang J, Cui Y, Wang D. Design of Hollow Nanostructures for Energy Storage, Conversion and Production. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1801993. [PMID: 30238544 DOI: 10.1002/adma.201801993] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/13/2018] [Indexed: 05/20/2023]
Abstract
Hollow nanostructures have shown great promise for energy storage, conversion, and production technologies. Significant efforts have been devoted to the design and synthesis of hollow nanostructures with diverse compositional and geometric characteristics in the past decade. However, the correlation between their structure and energy-related performance has not been reviewed thoroughly in the literature. Here, some representative examples of designing hollow nanostructure to effectively solve the problems of energy-related technologies are highlighted, such as lithium-ion batteries, lithium-metal anodes, lithium-sulfur batteries, supercapacitors, dye-sensitized solar cells, electrocatalysis, and photoelectrochemical cells. The great effect of structure engineering on the performance is discussed in depth, which will benefit the better design of hollow nanostructures to fulfill the requirements of specific applications and simultaneously enrich the diversity of the hollow nanostructure family. Finally, future directions of hollow nanostructure design to solve emerging challenges and further improve the performance of energy-related technologies are also provided.
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Affiliation(s)
- Jiangyan Wang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Yi Cui
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - Dan Wang
- State Key Laboratory of Biochemical Engineering, CAS Center for Excellence in Nanoscience, Institute of Process Engineering, Chinese Academy of Sciences, No. 1 Beiertiao, Zhongguancun, Haidian District, Beijing, 100190, China
- Centre for Clean Environment and Energy, Gold Coast Campus Griffith University, Queensland, 4222, Australia
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3
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Lancet D, Zidovetzki R, Markovitch O. Systems protobiology: origin of life in lipid catalytic networks. J R Soc Interface 2018; 15:20180159. [PMID: 30045888 PMCID: PMC6073634 DOI: 10.1098/rsif.2018.0159] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 06/29/2018] [Indexed: 12/17/2022] Open
Abstract
Life is that which replicates and evolves, but there is no consensus on how life emerged. We advocate a systems protobiology view, whereby the first replicators were assemblies of spontaneously accreting, heterogeneous and mostly non-canonical amphiphiles. This view is substantiated by rigorous chemical kinetics simulations of the graded autocatalysis replication domain (GARD) model, based on the notion that the replication or reproduction of compositional information predated that of sequence information. GARD reveals the emergence of privileged non-equilibrium assemblies (composomes), which portray catalysis-based homeostatic (concentration-preserving) growth. Such a process, along with occasional assembly fission, embodies cell-like reproduction. GARD pre-RNA evolution is evidenced in the selection of different composomes within a sparse fitness landscape, in response to environmental chemical changes. These observations refute claims that GARD assemblies (or other mutually catalytic networks in the metabolism first scenario) cannot evolve. Composomes represent both a genotype and a selectable phenotype, anteceding present-day biology in which the two are mostly separated. Detailed GARD analyses show attractor-like transitions from random assemblies to self-organized composomes, with negative entropy change, thus establishing composomes as dissipative systems-hallmarks of life. We show a preliminary new version of our model, metabolic GARD (M-GARD), in which lipid covalent modifications are orchestrated by non-enzymatic lipid catalysts, themselves compositionally reproduced. M-GARD fills the gap of the lack of true metabolism in basic GARD, and is rewardingly supported by a published experimental instance of a lipid-based mutually catalytic network. Anticipating near-future far-reaching progress of molecular dynamics, M-GARD is slated to quantitatively depict elaborate protocells, with orchestrated reproduction of both lipid bilayer and lumenal content. Finally, a GARD analysis in a whole-planet context offers the potential for estimating the probability of life's emergence. The invigorated GARD scrutiny presented in this review enhances the validity of autocatalytic sets as a bona fide early evolution scenario and provides essential infrastructure for a paradigm shift towards a systems protobiology view of life's origin.
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Affiliation(s)
- Doron Lancet
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Raphael Zidovetzki
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, CA 92521, USA
| | - Omer Markovitch
- Origins Center, Center for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Groningen, the Netherlands
- Blue Marble Space Institute of Science, Seattle, WA, USA
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4
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Park DS, Joseph KE, Koehle M, Krumm C, Ren L, Damen JN, Shete MH, Lee HS, Zuo X, Lee B, Fan W, Vlachos D, Lobo RF, Tsapatsis M, Dauenhauer PJ. Tunable Oleo-Furan Surfactants by Acylation of Renewable Furans. ACS CENTRAL SCIENCE 2016; 2:820-824. [PMID: 27924310 PMCID: PMC5126714 DOI: 10.1021/acscentsci.6b00208] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Indexed: 06/01/2023]
Abstract
An important advance in fluid surface control was the amphiphilic surfactant composed of coupled molecular structures (i.e., hydrophilic and hydrophobic) to reduce surface tension between two distinct fluid phases. However, implementation of simple surfactants has been hindered by the broad range of applications in water containing alkaline earth metals (i.e., hard water), which disrupt surfactant function and require extensive use of undesirable and expensive chelating additives. Here we show that sugar-derived furans can be linked with triglyceride-derived fatty acid chains via Friedel-Crafts acylation within single layer (SPP) zeolite catalysts. These alkylfuran surfactants independently suppress the effects of hard water while simultaneously permitting broad tunability of size, structure, and function, which can be optimized for superior capability for forming micelles and solubilizing in water.
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Affiliation(s)
- Dae Sung Park
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Kristeen E. Joseph
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Maura Koehle
- Department
of Chemical Engineering, University of Delaware, Newark, Delaware 19716, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Christoph Krumm
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Sironix
Renewables, Minneapolis, Minnesota 55455, United States
| | - Limin Ren
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Jonathan N. Damen
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Meera H. Shete
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Han Seung Lee
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Xiaobing Zuo
- X-ray Science
Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Byeongdu Lee
- X-ray Science
Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wei Fan
- Department
of Chemical Engineering, University of Massachusetts
Amherst, Amherst, Massachusetts 01003, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Dionisios
G. Vlachos
- Department
of Chemical Engineering, University of Delaware, Newark, Delaware 19716, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Raul F. Lobo
- Department
of Chemical Engineering, University of Delaware, Newark, Delaware 19716, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Michael Tsapatsis
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
| | - Paul J. Dauenhauer
- Department
of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Catalysis
Center for Energy Innovation, Energy Frontier Research Center, U.S. Department of Energy, Newark, Delaware 19716, United States
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5
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Affiliation(s)
- Haotian Sun
- Department of Chemical and Biological Engineering; University at Buffalo, State University of New York; Buffalo NY 14260 USA
| | - Chih-Kuang Chen
- Department of Fiber and Composite Materials; Feng Chia University; No. 100 Wenhwa Road Taichung Taiwan 40724 ROC
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering; Johns Hopkins University; 3400 North Charles Street Baltimore MD 21218 USA
| | - Chong Cheng
- Department of Chemical and Biological Engineering; University at Buffalo, State University of New York; Buffalo NY 14260 USA
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6
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Banno T, Kazayama Y, Toyota T. Giant Vesicle Formation of Novel Polymerizable Amphiphile Associated with Its Polymerization and Hydrolysis in Water. CHEM LETT 2014. [DOI: 10.1246/cl.140635] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Taisuke Banno
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo
| | - Yuki Kazayama
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo
| | - Taro Toyota
- Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo
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7
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Nag OK, Awasthi V. Surface engineering of liposomes for stealth behavior. Pharmaceutics 2013; 5:542-69. [PMID: 24300562 PMCID: PMC3873679 DOI: 10.3390/pharmaceutics5040542] [Citation(s) in RCA: 193] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/10/2013] [Accepted: 10/14/2013] [Indexed: 02/08/2023] Open
Abstract
Liposomes are used as a delivery vehicle for drug molecules and imaging agents. The major impetus in their biomedical applications comes from the ability to prolong their circulation half-life after administration. Conventional liposomes are easily recognized by the mononuclear phagocyte system and are rapidly cleared from the blood stream. Modification of the liposomal surface with hydrophilic polymers delays the elimination process by endowing them with stealth properties. In recent times, the development of various materials for surface engineering of liposomes and other nanomaterials has made remarkable progress. Poly(ethylene glycol)-linked phospholipids (PEG-PLs) are the best representatives of such materials. Although PEG-PLs have served the formulation scientists amazingly well, closer scrutiny has uncovered a few shortcomings, especially pertaining to immunogenicity and pharmaceutical characteristics (drug loading, targeting, etc.) of PEG. On the other hand, researchers have also begun questioning the biological behavior of the phospholipid portion in PEG-PLs. Consequently, stealth lipopolymers consisting of non-phospholipids and PEG-alternatives are being developed. These novel lipopolymers offer the potential advantages of structural versatility, reduced complement activation, greater stability, flexible handling and storage procedures and low cost. In this article, we review the materials available as alternatives to PEG and PEG-lipopolymers for effective surface modification of liposomes.
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Affiliation(s)
- Okhil K Nag
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, 1110 North Stonewall Avenue, Oklahoma City, OK 73117, USA.
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8
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Dayani Y, Malmstadt N. Liposomes with double-stranded DNA anchoring the bilayer to a hydrogel core. Biomacromolecules 2013; 14:3380-5. [PMID: 24083513 PMCID: PMC3874235 DOI: 10.1021/bm401155a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Liposomes are important biomolecular nanostructures for handling membrane-associated molecules in the lab and delivering drugs in the clinic. In addition to their biomedical applications, they have been widely used as model cell membranes in biophysical studies. Here we present a liposome-based model membrane that mimics the attachment of membrane-resident molecules to the cytoskeleton. To facilitate this attachment, we have developed a lipid-based hybrid nanostructure in which the liposome bilayer membrane is covalently anchored to a biocompatible poly(ethylene) glycol (PEG) hydrogel core using short double-stranded DNA (dsDNA) linkers. The dsDNA linkers connect cholesterol groups that reside in the bilayer to vinyl groups that are incorporated in the cross-linked hydrogel backbone. Size exclusion chromatography (SEC) of intact and surfactant-treated nanoparticles confirms the formation of anchored hydrogel structures. Transmission electron microscopy (TEM) shows ~100 nm nanoparticles even after removal of unanchored phospholipids. The location of dsDNA groups at the hydrogel-bilayer interface is confirmed with a fluorescence assay. Using DNA as a linker between the bilayer and a hydrogel core allows for temperature-dependent release of the anchoring interaction, produces polymer nanogels with addressible hybridization sites on their surface, and provides a prototype structure for potential future oligonucleotide drug delivery applications.
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Affiliation(s)
- Yasaman Dayani
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
| | - Noah Malmstadt
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, United States
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9
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Yan X, An X. Thermal and photic stimuli-responsive polydiacetylene liposomes with reversible fluorescence. NANOSCALE 2013; 5:6280-6283. [PMID: 23740098 DOI: 10.1039/c3nr00954h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A novel reversible fluorescent switch of a polydiacetylene liposome (PDA liposome) was realized by alternating heating and UV irradiation processes. The reversible fluorescence switching of the PDA liposome was mainly caused by the microstructural changes of the PDA backbone in the PDA liposomes under the alternating conditions of heating and UV irradiation.
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Affiliation(s)
- Xiaojuan Yan
- East China University of Science and Technology, Meilong Road No. 130, Shanghai, China
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10
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Asymmetric gold nanoparticles synthesized in the presence of maltose-modified poly(ethyleneimine). Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.08.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Kumar A, Kolar SS, Zao M, McDermott AM, Cai C. Localization of antimicrobial peptides on polymerized liposomes leading to their enhanced efficacy against Pseudomonas aeruginosa. MOLECULAR BIOSYSTEMS 2011; 7:711-3. [PMID: 21229178 PMCID: PMC3235330 DOI: 10.1039/c0mb00207k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Antimicrobial peptide IG-25 (a truncated version of LL-37 of the cathelicidin family) tethering an azido-capped poly(ethylene glycol) chain at the N-terminus was site-specifically attached to alkynyl-terminated polymerized liposomes using copper catalyzed "click" reaction, leading to an 18 fold enhancement in efficacy against Pseudomonas aeruginosa when compared to LL-37 without any increase in cytotoxicity to human corneal epithelial cells.
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Affiliation(s)
- Amit Kumar
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | - Satya S. Kolar
- College of Optometry, University of Houston, Houston, TX 77204, USA
| | - Meriong Zao
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | | | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
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12
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Zou X, Liu B, Li Q, Li Z, Liu B, Wu W, Zhao Q, Sui Y, Li D, Zou B, Cui T, Zou G, Mao HK. One-step synthesis, growth mechanism and photoluminescence properties of hollow GeO2walnuts. CrystEngComm 2011. [DOI: 10.1039/c0ce00170h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Kumar A, Erasquin UJ, Qin G, Li K, Cai C. "Clickable", polymerized liposomes as a versatile and stable platform for rapid optimization of their peripheral compositions. Chem Commun (Camb) 2010; 46:5746-8. [PMID: 20585691 DOI: 10.1039/c0cc00784f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A versatile and stable liposomal platform is developed for rapid optimization of its peripheral composition. The platform is based on polydiacetylene lipids terminated with alkynyl groups. Conditions for copper-catalyzed azide-alkyne cycloaddition (a "click" reaction) are optimized for rapid attachment of azides with controlled composition onto the liposomes.
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Affiliation(s)
- Amit Kumar
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
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14
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Liu J, Pang Y, Huang W, Zhu X, Zhou Y, Yan D. Self-Assembly of phospholipid-analogous hyperbranched polymers nanomicelles for drug delivery. Biomaterials 2010; 31:1334-41. [DOI: 10.1016/j.biomaterials.2009.10.021] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Accepted: 10/08/2009] [Indexed: 10/20/2022]
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15
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Guo C, Liu S, Jiang C, Li W, Dai Z, Fritz H, Wu X. A promising drug controlled-release system based on diacetylene/phospholipid polymerized vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:13114-13119. [PMID: 19852472 DOI: 10.1021/la9034112] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel polymerized vesicular carrier loaded with paclitaxel was developed by introducing the ultraviolet (UV) cross-linkable 10,12-pentacosadiynoic acid (PCDA) into bilayered phospholipid vesicles with the purpose of improving the physicochemical stability as well as the controlled-release property of liposomes. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) results revealed the enhanced stability of PCDA-polymerized vesicles against Triton X-100. In particular, alteration in PCDA/phospholipids ratios and UV-irradiation time can modulate the cumulative paclitaxel released. For instance, vesicles composed of phospholipids only released 98.0 +/- 2.1% of paclitaxel within 24 h. Over the same time period, 72.0 +/- 5.8%, 43.9 +/- 6.5%, and 20.1 +/- 5.4% of paclitaxel was released from polymerized PCDA/phospholipid vesicles at molar ratios of 1:3, 1:1, and 3:1, respectively. Likewise, by increasing the UV-irradiation time from 20 to 40 min, the cumulative release of paclitaxel from polymerized PCDA/phospholipid vesicles at molar ratio of 1:1 decreased from 90.5 +/- 3.7% to 37.6 +/- 2.3% over a time period of experimental observation of 24 h. The influences of vesicle composition (i.e., PCDA/phospholipids ratio) and UV-irradiation time on the release rates of paclitaxel were further examined by finite element (FE) analyzed using Abaqus. Our results demonstrate that novel polymerized vesicles capable of regulating the release of anticancer drugs such as paclitaxel have been developed.
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Affiliation(s)
- Caixin Guo
- Nanobiotechnology Division, Bio-X Center, State Key Laboratory of Urban Water Resources and Environment, School of Sciences, Harbin Institute of Technology, Harbin, 150001, China
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Sakamoto J, van Heijst J, Lukin O, Schlüter AD. Two-dimensional polymers: just a dream of synthetic chemists? Angew Chem Int Ed Engl 2009; 48:1030-69. [PMID: 19130514 DOI: 10.1002/anie.200801863] [Citation(s) in RCA: 484] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In light of the considerable impact synthetic 2D polymers are expected to have on many fundamental and applied aspects of the natural and engineering sciences, it is surprising that little research has been carried out on these intriguing macromolecules. Although numerous approaches have been reported over the last several decades, the synthesis of a one monomer unit thick, covalently bonded molecular sheet with a long-range ordered (periodic) internal structure has yet to be achieved. This Review provides an overview of these approaches and an analysis of how to synthesize 2D polymers. This analysis compares polymerizations in (initially) a homogeneous phase with those at interfaces and considers structural aspects of monomers as well as possibly preferred connection modes. It also addresses issues such as shrinkage as well as domain and crack formation, and briefly touches upon how the chances for a successful structural analysis of the final product can possibly be increased.
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Affiliation(s)
- Junji Sakamoto
- Department of Materials, HCI J 541, ETH Zürich, Wolfgang Pauli Strasse 10, 8093 Zürich, Switzerland
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17
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Kimura M, Nakano Y, Adachi N, Tatewaki Y, Shirai H, Kobayashi N. Intramolecular Axial Ligation of Zinc Porphyrin Cores with Triazole Links within Dendrimers. Chemistry 2009; 15:2617-24. [DOI: 10.1002/chem.200801557] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Lee JH, Danino D, Raghavan SR. Polymerizable vesicles based on a single-tailed fatty acid surfactant: a simple route to robust nanocontainers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:1566-1571. [PMID: 19138066 DOI: 10.1021/la802373j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Vesicles with polymerizable bilayers have attracted interest because of their increased robustness, which is advantageous for applications. However, to prepare such vesicles, lipids with polymerizable moieties usually need to be synthesized, and this often involves cumbersome, multistep reactions. Here, we present an alternative, simpler approach based on a commercially available, single-tailed surfactant, viz. 10-undecenoic acid (UDA), a fatty acid with a terminal double bond. Previously, the polymerization of UDA micelles in water has been studied. We show that UDA can also be induced to form vesicles by adjusting the pH: vesicles form at intermediate pH (6-8), whereas at higher pH (>11), the vesicles are transformed into micelles. The presence of UDA vesicles in the pH 6-8 range is confirmed using small-angle neutron scattering (SANS) and cryotransmission electron microscopy (cryo-TEM). Subsequent thermal polymerization of UDA bilayers is done using 2,2-dimethoxy-2-phenylacetophenone (DMPA) as initiator. A partial polymerization of the bilayers is achieved, and polymerized UDA vesicles resist disruption into micelles when the solution pH is increased. To make the bilayers more robust, the vesicles are copolymerized with divinylbenzene (DVB), a hydrophobic cross-linker that partitions into the bilayer. DVB-cross-linked UDA vesicles are very stable and cannot be disrupted by detergents like Triton X-100.
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Affiliation(s)
- Jae-Ho Lee
- Department of Chemical & Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111, USA
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19
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20
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Goto R. Tissue distribution of 99mic-labeled liposomes prepared from synthetic amphiphiles containing amino acid residues. J Liposome Res 2008. [DOI: 10.3109/08982109409018607] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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21
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Li X, Zheng Z, Han M, Chen Z, Zou G. Tuning J-Aggregates of Tetra(p-hydroxyphenyl)porphyrin by the Headgroups of Ionic Surfactants in Acidic Nonionic Micellar Solution. J Phys Chem B 2007; 111:4342-8. [PMID: 17408251 DOI: 10.1021/jp067148a] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
J-aggregates of the diacid form of tetra(p-hydroxyphenyl)porphyrin (THPP) were found to be stable in nonionic micellar solution in the presence of trace ionic surfactant with an oxyacid headgroup. The excitation energy of exciton coupling depends systematically on the headgroups of the ionic surfactant, by which strong and weak coupling can be accomplished in the J-aggregates. The J-aggregates have two strong exciton bands corresponding to the B- and Q-bands of the protonated monomers. The total fluorescence of THPP is quenched through aggregate formation. A strong and sharply peaked resonance light-scattering signal that suggests a delocalized excitonic state was observed just slightly to the red of the absorption maximum of the J-aggregates. The overall resonance Raman intensities appeared to be stronger in the aggregates than in the monomers. In the kinetics of aggregation induced by sodium dodecyl sulfate (SDS), no characteristics of autocatalyzed reactions were observed, and there was only a logarithmic phase that lasted only several seconds.
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Affiliation(s)
- Xiwen Li
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, P.R. China
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22
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Comrie JE, Huck WTS. Formation of hybrid 2D polymer-metal microobjects. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:1569-76. [PMID: 17241089 DOI: 10.1021/la0619372] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This paper describes a fabrication strategy based on polymer brushes (20-150 nm thick) and soft lithographic techniques, for creating hydrophobic, cross-linked, laterally patterned polymer films. The hydrophobicity of the resulting micrometer-scale "quasi-2D" objects is shown to allow the polymer to act as an etch resist. By adjusting the etching time, we demonstrate that underetching of the gold from underneath the edges of the laterally patterned films can be used to create free-standing polymer-gold hybrid structures. These structures retain their structural integrity when lifted wholly or partially from the substrate and can hence be imaged in suspension. Characterization of the quasi-2D objects was carried out using atomic force microscopy (AFM), ellipsometry, optical microscopy, and Fourier transform infrared spectroscopy (FTIR). A continuous film, containing embedded polymer-gold objects, can be lifted, folded, and re-deposited onto a substrate without damaging the conductivity of the embedded metallic objects.
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Affiliation(s)
- Jean E Comrie
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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Li X, Li D, Zeng W, Zou G, Chen Z. Exciton Coupling of Tetra(p-hydroxyphenyl)porphyrin Controlled by Substituents of Counterions in Triton X-100 Micellar Solution. J Phys Chem B 2007; 111:1502-6. [PMID: 17249722 DOI: 10.1021/jp0669815] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The interactions of nonionic meso-tetra(p-hydroxyphenyl)porphyrin (THPP) with CX3COOH (X = F, Cl, Br) in Triton X-100 (TX) micellar solution have been investigated by optical absorption, resonance light-scattering, and fluorescence spectroscopies. The double red-shifted absorption bands and strong resonance light scattering (RLS) signal imply that the assemblies induced by trihalo acetic acids belong to J-aggregates. The fluorescence of porphyrin is quenched due to the aggregate formation. The kinetics of assemblies trigged by CBr3COOH is studied via stopped-flow techniques. No characteristics of autocatalyzed reactions are observed, and there is only a log phase. The nature of the exciton coupling of transition dipole moment can be systematically changed by the haloid substituents of the organic counteranion.
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Affiliation(s)
- Xiwen Li
- State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
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24
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Cheng Z, D’Ambruoso GD, Aspinwall CA. Stabilized porous phospholipid nanoshells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:9507-11. [PMID: 17073472 PMCID: PMC3500630 DOI: 10.1021/la061542i] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Chemically stabilized, porous phospholipid nanoshells (PPNs) were prepared via copolymerization of reactive monomers with unilamellar bis-Sorbyl phosphatidylcholine vesicles. The resulting PPN vesicular assemblies possess a highly porous membrane structure that allows passage of small molecules, which can react with encapsulated proteins and reporters. The unique combination of membrane stability and porosity will prove useful for preparing nanometer-sized sensor, container, and reactor platforms stable in harsh chemical and biological environments.
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Affiliation(s)
| | | | - Craig A. Aspinwall
- To whom correspondence should be addressed: , phone: 520-621-6338, fax: 520-621-8407
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25
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Ihara H, Nagaoka S, Tanaka H, Sakaki S, Hirayama C. Lipid Membrane Analogue-Immobilized Silica Gels for Separation with Molecular Recognition. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079608015120] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Hirotaka Ihara
- a Department of Applied Chemistry & Biochemistry , Kumamoto University Kurokami , Kumamoto, 860, Japan
| | - Shoji Nagaoka
- b Kumamoto Industrial Research , Institute Higashimachi , Kumamoto, 862, Japan
| | - Hideaki Tanaka
- a Department of Applied Chemistry & Biochemistry , Kumamoto University Kurokami , Kumamoto, 860, Japan
| | - Sigeyoshi Sakaki
- a Department of Applied Chemistry & Biochemistry , Kumamoto University Kurokami , Kumamoto, 860, Japan
| | - Chuichi Hirayama
- a Department of Applied Chemistry & Biochemistry , Kumamoto University Kurokami , Kumamoto, 860, Japan
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26
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Jiang Y, Li X, Liu H, Xu Z, Shen X, Ma X, Xue Z. Fabrication of monodisperse colloidal array with confinement effects. Chem Commun (Camb) 2006:75-7. [PMID: 16353097 DOI: 10.1039/b512346a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A monodisperse 1D colloidal array is prepared from monomer directly combining precipitation polymerization and confinement effects.
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Affiliation(s)
- Yuan Jiang
- State Key Laboratory of Coordination Chemistry and Laboratory of Solid State Microstructure, Nanjing University, China
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27
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Gandini SCM, Itri R, de Sousa Neto D, Tabak M. Porphyrin Effects on Zwitterionic HPS Micelles as Investigated by Small-Angle X-ray Scattering (SAXS) and Electron Paramagnetic Resonance (EPR). J Phys Chem B 2005; 109:22264-72. [PMID: 16853899 DOI: 10.1021/jp052657i] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, small-angle X-ray scattering (SAXS) and electron paramagnetic resonance (EPR) studies on the interaction of three anionic mesotetrakis (4-sulfonatophenyl) porphyrins, TPPS4, FeTPPS4, and ZnTPPS4, at concentrations in the 2-10 mM range, with micelles of the zwitterionic surfactant 3-(N-hexadecyl-N,N-dimethylammonium) propane sulfonate (HPS, 30 mM) at pH 4.0 and 9.0 are reported. The SAXS results demonstrate that, upon addition of all species of porphyrins, the HPS micelle of prolate shape reduces its axial ratio from 1.8 +/- 0.2 (in the absence of porphyrin) to 1.5 +/- 0.1. Such an effect is accompanied by a shrinking of the paraffinic shortest semiaxis from 22.5 +/- 0.5 A to 18.0 +/- 0.2 A. This shows that the micellar hydrophobic core is affected by porphyrin incorporation, independent of the type of porphyrin and pH. Concurrently, EPR results demonstrate an increase in the micellar packing as noticed from the increase in motional restriction for both nitroxides. Furthermore, increase of the porphyrin concentration induces the appearance of a repulsive interference function over the SAXS curve of zwitterionic micelles, which is typical of an interaction between surface-charged micelles. Such a finding gives strong evidence that the negatively charged porphyrin molecule must accommodate in the HPS micelle dipole layer close to the inner positive charges (near the hydrophobic core), inducing a surface charge (probably a negative one associated with the HPS sulfonate external groups) in the original zwitterionic (overall neutral) micelle. Such a porphyrin location is favored by both electrostatic and hydrophobic contributions, giving rise to binding constant values that are quite large compared to the binding of cationic drugs to HPS micelles (Caetano, W.; Barbosa, L. R. S.; Itri, R.; Tabak, M. J. Coll. Int. Sci. 2003, 260, 414).
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Affiliation(s)
- Shirley C M Gandini
- Instituto de Química de São Carlos, Universidade de São Paulo, Cx. Postal 780, CEP 13560-970, São Carlos, SP, Brazil
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28
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Retzinger GS, Takayama K. Mitogenicity of a spread film of monophosphoryl lipid A. Exp Mol Pathol 2005; 79:161-7. [PMID: 16054128 DOI: 10.1016/j.yexmp.2005.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2005] [Accepted: 06/20/2005] [Indexed: 11/26/2022]
Abstract
When spread at the air-water interface, monophosphoryl lipid A (MPLA) forms stable insoluble monolayers that collapse at approximately 55 dyn/cm. At collapse, the exclusion area of each molecule is approximately 119 Angstrom(2), consistent with the cross-sectional area of the lipid's 6 acyl chains. The nominal thickness of such films is approximately 22 Angstrom, determined, presumably, by the length of the acyl chains. For biological modeling of MPLA films, a system was developed in which monolayers of the lipid are supported by monodisperse hydrophobic beads of microscopic dimensions. Beads coated with MPLA monolayers within which the nominal area of each molecule is approximately equivalent to the "take-off" area of the lipid at the air-water interface, 280 Angstrom(2), are mitogenic for spleen cells. Given the natural occurrence of lipid A in the bacterial cell wall as well as the inherent stability of lipid A films, it seems reasonable to assume that at least some of the biological activities attributed to the lipid derive from its presentation/operation at an interface, i.e., on a surface. We propose beads coated with adsorbed films of lipid A will prove useful tools for modeling the activities of the lipid both in vitro and in vivo, and for elucidating the surface dependency and structural requirements of those activities.
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Affiliation(s)
- Gregory S Retzinger
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, OH 45267-0529, USA.
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29
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Polymeric monolayers and liposomes as models for biomembranes. ADVANCES IN POLYMER SCIENCE 2005. [DOI: 10.1007/3-540-13483-2_1] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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30
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Li S, Nickels J, Palmer AF. Liposome-encapsulated actin–hemoglobin (LEAcHb) artificial blood substitutes. Biomaterials 2005; 26:3759-69. [PMID: 15621266 DOI: 10.1016/j.biomaterials.2004.09.015] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2004] [Accepted: 09/08/2004] [Indexed: 10/26/2022]
Abstract
A new approach to enhance the circulation persistence of liposomes has been applied to develop liposome-encapsulated actin-hemoglobin (LEAcHb) dispersions as potential blood substitutes by introducing an actin matrix into the liposome aqueous core. Asymmetric flow field-flow fractionation coupled with multi-angle static light scattering was used to study the shape, size distribution, and encapsulation efficiency of liposome-encapsulated hemoglobin (LEHb) and LEAcHb dispersions. By polymerizing monomeric actin into filamentous actin inside the liposome aqueous core, LEAcHb particles transformed into a disk-like shape. We studied the effect of an encapsulated actin matrix on the size distribution, hemoglobin (Hb) encapsulation efficiency, oxygen affinity, and methemoglobin (MetHb) level of LEAcHb dispersions, and compared them with plain LEHb dispersions (without actin). LEHb, and LEAcHb dispersions extruded through 400 nm membranes were injected into rats and it was observed that LEAcHb dispersions with 1mg/mL of actin enhanced the circulatory half-life versus LEHb dispersions. The circulatory characteristics of empty PEGylated and non-PEGylated actin-containing liposomes (without Hb) were studied as controls for the LEHb and LEAcHb dispersions in this paper, which displayed maximum circulatory half-lives greater than 72 h. Taken together the results of this study supports our hypothesis that a lipid membrane supported by an underlying actin matrix will extend the circulatory half-life of LEHb dispersions.
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Affiliation(s)
- Shuliang Li
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, 171 Fitzpatrick Hall, Notre Dame, IN 46556, USA
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31
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Xu JP, Ji J, Chen WD, Shen JC. Novel Biomimetic Surfactant: Synthesis and Micellar Characteristics. Macromol Biosci 2005; 5:164-71. [PMID: 15729722 DOI: 10.1002/mabi.200400139] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Novel biomimetic surfactants based on cholesterol as the hydrophobic segment and poly[2-(methacryloyloxy)ethyl phosphorylcholine] (pMPC) as the hydrophilic segment were synthesized in the present study by atom transfer radical polymerization (ATRP) of 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) using a cholesterol-based macroinitiator. The association behavior of cholesterol-block-poly[2-(methacryloyloxy)ethyl phosphorylcholine] (Chol-pMPCs) in aqueous solution was studied by (1)H NMR spectroscopy, fluorescence probe technique, and atomic force microscopy (AFM). The (1)H NMR spectrum of the polymer in CD(3)OD showed both the cholesterol group and the phosphorylcholine group while the cholesterol group did not appeared in the (1)H NMR spectrum of the polymer in D(2)O, which implied the formation of a micelle structure. Fluorescence excitation spectra of a pyrene probe solubilized in the aggregates of Chol-pMPCs suggested the presence of a critical micelle concentration (cmc) in water. The critical micelle concentrations of the polymers CMPC10, CMPC20 and CMPC40 were determined to be 7.27 x 10(-3), 13.47 x 10(-3), and 20.77 x 10(-3) mg . mL(-1), respectively. AFM images of the aggregates on mica suggested that the pMPC block formed the biocompatible micelle coronas and the cholesterol block formed the hydrophobic micelle cores. These new biomimetic diblock copolymers were evaluated as "stealthy" nanocapsules for the delivery of hydrophobic drugs. The anti-cancer drug adriamycin (ADR) was chosen as a hydrophobic drug to be incorporated into the inner core of the micelles and the morphology of the drug-loaded micelles were observed by AFM.
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Affiliation(s)
- Jian-Ping Xu
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China
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32
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Gosse C, Boutorine A, Aujard I, Chami M, Kononov A, Cogné-Laage E, Allemand JF, Li J, Jullien L. Micelles of Lipid−Oligonucleotide Conjugates: Implications for Membrane Anchoring and Base Pairing. J Phys Chem B 2004; 108:6485-97. [DOI: 10.1021/jp031188m] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Gosse
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - A. Boutorine
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - I. Aujard
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - M. Chami
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - A. Kononov
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - E. Cogné-Laage
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - J.-F. Allemand
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - J. Li
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
| | - L. Jullien
- Laboratoire de Physique Statistique CNRS UMR 8550, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Département de Chimie CNRS UMR 8640, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France, Laboratoire de Biophysique CNRS/MNHN UMR 5153, Muséum National d'Histoire Naturelle, 43 rue Cuvier, F-75231 Paris Cedex 05, France, and Laboratoire de Physico-Chimie CNRS UMR 168, Institut Curie, 26, rue d'Ulm, 75248 Paris Cedex 05, France
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Jung HM, Price KE, McQuade DT. Synthesis and characterization of cross-linked reverse micelles. J Am Chem Soc 2003; 125:5351-5. [PMID: 12720448 DOI: 10.1021/ja0271983] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The design and synthesis of a new cross-linkable amphiphile is reported. Solutions of the amphiphile in a toluene/water mixture form reverse micelles as indicated by dynamic light scattering and NMR spectroscopy. As indicated by dynamic light scattering, TEM, and NMR spectroscopy data, these reverse micelles can be cross-linked without drastically changing the radius of the reverse micelles. Mixed reverse micelles are also characterized and cross-linked. The cross-linked reverse micelles are demonstrated to facilitate phase transfer and can be used to site isolate a catalyst.
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Affiliation(s)
- Hyun M Jung
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, USA
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35
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Mueller A, O’Brien DF. Supramolecular materials via polymerization of mesophases of hydrated amphiphiles. Chem Rev 2002; 102:727-57. [PMID: 11890755 PMCID: PMC1592244 DOI: 10.1021/cr000071g] [Citation(s) in RCA: 226] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anja Mueller
- C. S. Marvel Laboratories, Department of Chemistry, University of Arizona, Tucson, Arizona 85721
| | - David F. O’Brien
- C. S. Marvel Laboratories, Department of Chemistry, University of Arizona, Tucson, Arizona 85721
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36
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Stauch O, Uhlmann T, Fröhlich M, Thomann R, El-Badry M, Kim YK, Schubert R. Mimicking a cytoskeleton by coupling poly(N-isopropylacrylamide) to the inner leaflet of liposomal membranes: effects of photopolymerization on vesicle shape and polymer architecture. Biomacromolecules 2002; 3:324-32. [PMID: 11888319 DOI: 10.1021/bm015613y] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Networks of N-isopropylacrylamide (NIPAM) copolymers, coupled to spherical phospholipid bilayers, are suitable as a model for the study of the interaction between the cytoskeleton and cellular membranes, as well as for promising new drug delivery systems with triggerable drug release properties and improved stability. In this article, we describe a simple preparation technique for liposomes from egg phosphatidyl choline (EPC) encapsulating a cross-linked NIPAMminus signTEGDM copolymer skeleton (tetraethylene glycol dimethacrylate, TEGDM) which is coupled only to the inner monolayer by a novel membrane anchor monomer. Polymerization in the lipid vesicles was initiated at the inner membrane surface by the radical initiator 2,2-diethoxy-acetophenone (DEAP) permeating through the membrane from the outside. The effects of photopolymerization and polymer formation on vesicle shape and membrane integrity were studied by transmission electron microscopy (TEM), cryo-TEM, and atomic force microscopy (AFM). Upon UV irradiation, approximately 100% of the vesicles contained a polymer gel and only occasional changes in the spherical shape of the liposomes were observed. The architecture of the polymer network inside the liposomal compartment was determined by the conditions of the photopolymerization. Composite structures of polymer hollow spheres or solid spheres, respectively, tethered to spherical membrane vesicles were produced. The increased stability of the polymer-tethered lipid bilayers against solubilization by sodium cholate, compared to pure EPC vesicles, was determined by radiolabeling the lipid membrane.
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Affiliation(s)
- Oliver Stauch
- Department of Pharmaceutical Technology, Hermann-Herder-Strasse 9, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg im Breisgau, Germany.
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Discher BM, Bermudez H, Hammer DA, Discher DE, Won YY, Bates FS. Cross-linked Polymersome Membranes: Vesicles with Broadly Adjustable Properties. J Phys Chem B 2002. [DOI: 10.1021/jp011958z] [Citation(s) in RCA: 219] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Korematsu A, Takemoto Y, Nakaya T, Inoue H. Synthesis, characterization and platelet adhesion of segmented polyurethanes grafted phospholipid analogous vinyl monomer on surface. Biomaterials 2002; 23:263-71. [PMID: 11762845 DOI: 10.1016/s0142-9612(01)00104-1] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New segmented polyurethanes (SPUs) grafted phospholipid analogous vinyl monomer, 2-(methacryloyloxy)ethyl phosphorylcholine (MPC) on surface were synthesized. The soft segment of these polyurethanes was hydroxylated poly(isoprene) diol and the hard segments were 4,4'-methylenediphenyl diisocyanate (MDI) and 1,4-butanediol (BD). SPUs were hydroxylated by potassium peroxodisulfate and MPC was grafted on the surface of hydroxylated SPUs using di-ammonium cerium (IV) nitrate (ceric ammonium nitrate, CAN) as a radical initiator. The bulk characterization of synthesized SPUs was investigated by infrared spectroscopy (IR) and gel-permeation chromatography (GPC). The existence of phospholipid analogous groups on the surface of these SPUs was revealed by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and contact angle measurements. The surfaces of MPC-grafted SPUs showed decreased water contact angles compared to non-grafted SPU and the presence of phosphorylcholine groups. The blood compatibilities of the new polymers were evaluated by platelet rich plasma (PRP) contact studies and viewed by scanning electron microscopy (SEM) using BioSpan and non-grafted polyurethane as references. We found that fewer platelets adhered to the MPC-grafted surfaces and that they showed less shape variation than the references. These results suggest that these grafted polymers may have the possibility of the usage for biomaterials.
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Affiliation(s)
- Arata Korematsu
- Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Osaka, Japan
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39
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Song J, Cheng Q, Kopta S, Stevens RC. Modulating artificial membrane morphology: pH-induced chromatic transition and nanostructural transformation of a bolaamphiphilic conjugated polymer from blue helical ribbons to red nanofibers. J Am Chem Soc 2001; 123:3205-13. [PMID: 11457054 DOI: 10.1021/ja0035046] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Design and characterization of helical ribbon assemblies of a bolaamphiphilic conjugated polymer and their color-coded transformation into nanofibers are described. An L-glutamic acid modified bolaamphiphilic diacetylene lipid was synthesized and self-assembled into right-handed helical ribbons with micron scale length and nano scale thickness under mild conditions. The ribbon structures were further stabilized by polymerizing well-aligned diacetylene units to form bisfunctional polydiacetylenes (PDAs). Transitions from flat sheets to helical ribbons and tubes were observed by transmission electron microscopy. The helical ribbons appear to originate from the rupture of flat sheets along domain edges and the peeling off between stacked lipid layers. These results point to the applicability of chiral packing theory in bolaamphiphilic supramolecular assemblies. Contact mode atomic force microscopy observations revealed that high order existed in the surface packing arrangement. Hexagonal and pseudorectangular packings were observed in flat and twisted regions of the ribbons, respectively, suggesting a correlation between microscopic morphologies and nanoscopic packing arrangements. The tricarboxylate functionalities of the bolaamphiphilic lipid provide a handle for the manipulation of the bisfunctional PDAs' morphology. Increasing solution pH caused the fraying of helical ribbons into nanofibers accompanied by a sharp blue-to-red chromatic transition. A dramatic change in circular dichroism spectra was observed during this process, suggesting the loss of chirality in packing. A model is proposed to account for the pH-induced morphological change and chromatic transition. The color-coded transition between two distinct microstructures would be useful in the design of sensors and other "smart" nanomaterials requiring defined molecular templates.
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Affiliation(s)
- J Song
- Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA
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40
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1. Chemistry of surfactants. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1383-7303(01)80062-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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41
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Blondelle SE, Lohner K, Aguilar M. Lipid-induced conformation and lipid-binding properties of cytolytic and antimicrobial peptides: determination and biological specificity. BIOCHIMICA ET BIOPHYSICA ACTA 1999; 1462:89-108. [PMID: 10590304 DOI: 10.1016/s0005-2736(99)00202-3] [Citation(s) in RCA: 153] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
While antimicrobial and cytolytic peptides exert their effects on cells largely by interacting with the lipid bilayers of their membranes, the influence of the cell membrane lipid composition on the specificity of these peptides towards a given organism is not yet understood. The lack of experimental model systems that mimic the complexity of natural cell membranes has hampered efforts to establish a direct correlation between the induced conformation of these peptides upon binding to cell membranes and their biological specificities. Nevertheless, studies using model membranes reconstituted from lipids and a few membrane-associated proteins, combined with spectroscopic techniques (i.e. circular dichroism, fluorescence spectroscopy, Fourier transform infra red spectroscopy, etc.), have provided information on specific structure-function relationships of peptide-membrane interactions at the molecular level. Reversed phase-high performance chromatography (RP-HPLC) and surface plasmon resonance (SPR) are emerging techniques for the study of the dynamics of the interactions between cytolytic and antimicrobial peptides and lipid surfaces. Thus, the immobilization of lipid moieties onto RP-HPLC sorbent now allows the investigation of peptide conformational transition upon interaction with membrane surfaces, while SPR allows the observation of the time course of peptide binding to membrane surfaces. Such studies have clearly demonstrated the complexity of peptide-membrane interactions in terms of the mutual changes in peptide binding, conformation, orientation, and lipid organization, and have, to a certain extent, allowed correlations to be drawn between peptide conformational properties and lytic activity.
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Affiliation(s)
- S E Blondelle
- Torrey Pines Institute for Molecular Studies, 3550 General Atomics Court, San Diego, CA 92121, USA.
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42
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Wang YF, Chen TM, Okada K, Sakurai I, Nakaya T. Structure in the condensed state and amphiphilic properties of novel copolymers having alkyl chains and phosphatidylcholine analogous groups. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1099-0518(19990501)37:9<1293::aid-pola9>3.0.co;2-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
Membrane fusion has been examined in a model system of small unilamellar vesicles of synthetic lipids that can be oligomerized through the lipid headgroups. The oligomerization can be induced either in both bilayer leaflets or in the inner leaflet exclusively. Oligomerization leads to denser lipid headgroup packing, with concomitant reduction of lipid lateral diffusion and membrane permeability. As evidenced by lipid mixing assays, electron microscopy, and light scattering, calcium-induced fusion of the bilayer vesicles is strongly retarded and inhibited by oligomerization. Remarkably, oligomerization of only the inner leaflet of the bilayer is already sufficient to affect fusion. The efficiency of inhibition and retardation of fusion critically depend on the relative amount of oligomeric lipid present, on the concentration of calcium ions, and on temperature. Implications for the mechanism of bilayer membrane fusion are discussed in terms of lipid lateral diffusion and membrane curvature effects.
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Affiliation(s)
- B J Ravoo
- Department of Organic and Molecular Inorganic Chemistry and Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG Groningen, The Netherlands
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Bhattacharya S, De S, Subramanian M. Synthesis and Vesicle Formation from Hybrid Bolaphile/Amphiphile Ion-Pairs. Evidence of Membrane Property Modulation by Molecular Design. J Org Chem 1998. [DOI: 10.1021/jo980315l] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | - Soma De
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | - M. Subramanian
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560 012, India
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45
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Affiliation(s)
- Sheldon Okada
- Lawrence Berkeley National Laboratory, Materials Sciences Division, Center for Advanced Materials, Berkeley, California 94720
| | - Susan Peng
- Lawrence Berkeley National Laboratory, Materials Sciences Division, Center for Advanced Materials, Berkeley, California 94720
| | - Wayne Spevak
- Lawrence Berkeley National Laboratory, Materials Sciences Division, Center for Advanced Materials, Berkeley, California 94720
| | - Deborah Charych
- Lawrence Berkeley National Laboratory, Materials Sciences Division, Center for Advanced Materials, Berkeley, California 94720
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46
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Maiti NC, Mazumdar S, Periasamy N. J- and H-Aggregates of Porphyrin−Surfactant Complexes: Time-Resolved Fluorescence and Other Spectroscopic Studies. J Phys Chem B 1998. [DOI: 10.1021/jp9723372] [Citation(s) in RCA: 684] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nakul C. Maiti
- Chemical Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| | - Shyamalava Mazumdar
- Chemical Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| | - N. Periasamy
- Chemical Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
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IHARA H, OKAZAKI S, OHMORI K, UEMURA S, HIRAYAMA C, NAGAOKA S. Polymer-Silica Hybrids: Evaluation of Grafted Poly(acrylonitrile) as Organic Phase for High-Performance Liquid Chromatography. ANAL SCI 1998. [DOI: 10.2116/analsci.14.349] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hirotaka IHARA
- Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
| | - Shinya OKAZAKI
- Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
| | - Kanako OHMORI
- Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
| | - Shinobu UEMURA
- Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
| | - Chuichi HIRAYAMA
- Department of Applied Chemistry & Biochemistry, Faculty of Engineering, Kumamoto University
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48
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Chen TM, Wang YF, Nakaya T. Monolayers and Multilayers of Amphiphilic Phospholipid Analogous Poly(Acrylamide)s. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1997. [DOI: 10.1080/10601329708010028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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50
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Wang YF, Chen TM, Li YJ, Kitamura M, Nakaya T, Sakurai I. Amphiphilic Poly(acrylamide)s Having Saturated and Unsaturated Dialkyl Chains and Phosphatidylcholine Groups in the Side Chains. Macromolecules 1996. [DOI: 10.1021/ma9603600] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y. F. Wang
- Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558, Japan
| | - T. M. Chen
- Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558, Japan
| | - Y. J. Li
- Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558, Japan
| | - M. Kitamura
- Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558, Japan
| | - T. Nakaya
- Department of Bioapplied Chemistry, Faculty of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558, Japan
| | - I. Sakurai
- Biophysics Laboratory, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01, Japan
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