1
|
Khaleque MDA, Okumura Y, Mitani M. Liposome Immobilization on Cross-linked Polymer Gel by In Situ Formation of Cleavable Covalent Bonds. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911506070822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Immobilization of liposomes onto chemically modified Sephacryl gel particles by in situreaction between liposome-incorporated thiols and mercapto moieties on the gel to form disulfide linkages was investigated. For the immobilization, both the mercapto moieties and the incorporated thiol were essential. The immobilization occurred upon coincubation of the modified liposomes with the modified gel for 48 hours. Once immobilized, no spontaneous detachment of the immobilized liposomes was observed. The degree of immobilization depended on both the thiol content and the ratio of the liposomes to the gel partilces. In a typical immobilization with 25mol% 1-octanethiol, 82% of the liposomal phosphatidylcholine in the system was found to be associated with the gel. By decreasing the ratio of the liposomes to gel it was possible to bring the immobilization close to quantitative one. Among the three different thiols examined (1-octanethiol, 1-hexadecanethiol and thiocholesterol), the extent of the immobilization was slightly higher with thiocholesterol than the alkanethiols. The immobilized liposomes were detached from the gel with dithiothreitol. Approximately 60% of the fluorescent dextran derivative encapsulated in the liposomes was retained throughout the immobilization-detachment process. The gel left after the detachment remained active for immobilizing a fresh batch of thiol-liposomes.
Collapse
Affiliation(s)
- MD. Abdul Khaleque
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano, Nagano 380-8553, Japan
| | - Y. Okumura
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano, Nagano 380-8553, Japan
| | - M. Mitani
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano, Nagano 380-8553, Japan
| |
Collapse
|
2
|
Ishigami T, Sugita K, Suga K, Okamoto Y, Umakoshi H. High performance optical resolution with liposome immobilized hydrogel. Colloids Surf B Biointerfaces 2015; 136:256-61. [DOI: 10.1016/j.colsurfb.2015.09.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/24/2015] [Accepted: 09/03/2015] [Indexed: 11/30/2022]
|
3
|
Monteiro M, Raiado-Pereira L, Prazeres D, Mateus M. Preparation of liposome membrane adsorbers and testing for plasmid purification. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2014.09.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
4
|
Hosta-Rigau L, Zhang Y, Teo BM, Postma A, Städler B. Cholesterol--a biological compound as a building block in bionanotechnology. NANOSCALE 2013; 5:89-109. [PMID: 23172231 DOI: 10.1039/c2nr32923a] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Cholesterol is a molecule with many tasks in nature but also a long history in science. This feature article highlights the contribution of this small compound to bionanotechnology. We discuss relevant chemical aspects in this context followed by an overview of its self-assembly capabilities both as a free molecule and when conjugated to a polymer. Further, cholesterol in the context of liposomes is reviewed and its impact ranging from biosensing to drug delivery is outlined. Cholesterol is and will be an indispensable player in bionanotechnology, contributing to the progress of this potent field of research.
Collapse
|
5
|
|
6
|
Luo X, Zhu A, Dai S. Amphiphilic and biocompatible properties of poly (EA-MAA). J Appl Polym Sci 2012. [DOI: 10.1002/app.37670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
7
|
Noorizadeh H, Farmany A, Noorizadeh M. pK(a) modelling and prediction of drug molecules through GA-KPLS and L-M ANN. Drug Test Anal 2011; 5:103-9. [PMID: 21500371 DOI: 10.1002/dta.279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Revised: 02/16/2011] [Accepted: 02/19/2011] [Indexed: 11/06/2022]
Abstract
Genetic algorithm and partial least square (GA-PLS), kernel PLS (GA-KPLS) and Levenberg- Marquardt artificial neural network (L-M ANN) techniques were used to investigate the correlation between dissociation constant (pK(a) ) and descriptors for 60 drug compounds. The applied internal (leave-group-out cross validation (LGO-CV)) and external (test set) validation methods were used for the predictive power of models. Descriptors of GA-KPLS model were selected as inputs in L-M ANN model. The results indicate that L-M ANN can be used as an alternative modeling tool for quantitative structure-property relationship (QSPR) studies.
Collapse
Affiliation(s)
- H Noorizadeh
- Faculty of Science, Islamic Azad University, Ilam Branch, Ilam, Iran.
| | | | | |
Collapse
|
8
|
Noorizadeh H, Sobhan Ardakani S, Ahmadi T, Mortazavi SS, Noorizadeh M. Application of genetic algorithm-kernel partial least square as a novel non-linear feature selection method: partitioning of drug molecules. Drug Test Anal 2011; 5:89-95. [DOI: 10.1002/dta.275] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Revised: 02/02/2011] [Accepted: 02/02/2011] [Indexed: 11/12/2022]
|
9
|
Godard T, Grushka E. The use of phospholipid modified column for the determination of lipophilic properties in high performance liquid chromatography. J Chromatogr A 2011; 1218:1211-8. [DOI: 10.1016/j.chroma.2010.12.105] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 12/20/2010] [Accepted: 12/23/2010] [Indexed: 10/18/2022]
|
10
|
Zhang W, Hu Z, Feng Y, Da S. Preparation and characterization of phosphatidylcholine-coated zirconia-magnesia stationary phase for artificial membrane chromatography. J Sep Sci 2010; 33:2990-7. [DOI: 10.1002/jssc.201000374] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
11
|
MacKinnon N, Guérin G, Liu B, Gradinaru CC, Rubinstein JL, Macdonald PM. Triggered instability of liposomes bound to hydrophobically modified core-shell PNIPAM hydrogel beads. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1081-1089. [PMID: 19754070 DOI: 10.1021/la902423v] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The ability to trigger a destabilization of the membrane integrity of liposomes bound to environmentally sensitive hydrophobically modified core-shell hydrogel beads is demonstrated. Hydrogel beads with a core composed of poly(N-isopropylacrylamide) lightly cross-linked with bisacrylamide (BA) (pNIPAM) and a shell composed of NIPAM highly cross-linked with BA and containing varying amounts of acrylic acid (AA) [p(NIPAM-co-AA)] undergo a volume phase transition (VPT) at approximately 32 degrees C, as determined from (1)H magic angle spinning (MAS) NMR, regardless of the AA content of the shell. When the shell was hydrophobically modified with either decylamine or tetradecylamine, binding of extruded large unilamellar vesicles (eLUVs) composed of 1-palmitoyl-2-oleoylphosphatidylcholine (POPC) was quantitative, as determined via fluorescence spectroscopy. Fluorescence microscopy showed that such bound eLUVs did not fuse. Hydrogel-bound eLUV membrane permeability was assessed using (31)P MAS NMR in the presence of the chemical shift agent praseodymium and demonstrated that only at lower degrees of hydrophobic modification of the core-shell hydrogels was eLUV membrane barrier integrity maintained when T < VPT. At a low degree of hydrophobic modification, cycling the temperature above the VPT even for short periods caused the eLUV membranes to become leaky. Hence, eLUV membrane permeability was coupled to the hydrogel VPT, a situation that would be useful in applications requiring triggered release of liposomal contents.
Collapse
Affiliation(s)
- Neil MacKinnon
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
| | | | | | | | | | | |
Collapse
|
12
|
LITERATURE ALERTS. J Microencapsul 2008. [DOI: 10.1080/026520499288726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
13
|
Brochu H, Vermette P. Young's moduli of surface-bound liposomes by atomic force microscopy force measurements. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2009-2014. [PMID: 18198906 DOI: 10.1021/la702382d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Mechanical properties of layers of intact liposomes attached by specific interactions on solid surfaces were studied by atomic force microscopy (AFM) force measurements. Force-distance measurements using colloidal probe tips were obtained over liposome layers and used to calculate Young's moduli by using the Hertz contact theory. A classical Hertz model and a modified Hertz one have been used to extract Young's moduli from AFM force curves. The modified model, proposed by Dimitriadis, is correcting for the finite sample thickness since Hertz's classical model is assuming that the sample is infinitely thick. Values for Young's moduli of 40 and 8 kPa have been obtained using the Hertz model for one and three layers of intact liposomes, respectively. Young's moduli of approximately 3 kPa have been obtained using the corrected Hertz model for both one and three layers of surface-bound liposomes. Compression work performed by the colloidal probe to compress these liposome layers has also been calculated.
Collapse
Affiliation(s)
- Heïdi Brochu
- Department of Chemical Engineering, Université de Sherbrooke, 2500, blvd de l'Université, Sherbrooke, Québec, Canada, J1K 2R1
| | | |
Collapse
|
14
|
Qi LW, Li P, Li SL, Sheng LH, Li RY, Song Y, Li HJ. Screening and identification of permeable components in a combined prescription of Danggui Buxue decoction using a liposome equilibrium dialysis system followed by HPLC and LC-MS. J Sep Sci 2007; 29:2211-20. [PMID: 17069252 DOI: 10.1002/jssc.200600107] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new method, i.e., liposome equilibrium dialysis followed by HPLC and LC-MS analysis, has been developed for the screening of permeable components in combined prescriptions of Danggui Buxue decoction (CPDBD). Multiple permeable components were simultaneously predicted by comparison of chromatograms of CPDBD extract before and after interaction with liposome membranes. A diode-array detector (DAD) and an evaporative light scattering detector (ELSD) were used, and the permeable compounds were identified by comparison with the available reference compounds and confirmed by on-line LC-MS. About fifteen compounds in a CPDBD extract were found to interact with liposome membranes. They were identified as calycosin-7-O-beta-D-glucoside (1), senkyunolide I or H (2), ononin (3), (6alphaR,11alphaR)-9,10-dimethoxypterocarpan-3-O-beta-D-glucoside (4), (3R)-2'-hydroxy-3',4'-dimethoxyisoflavan-7-O-beta-D-glucoside (5), calycosin (6), astragaloside IV (7), isoastragaloside II (8), formononetin (9), (6alphaR, 11alphaR),-3-hydroxy-9,10-dimethoxypterocarpan (10), (3R)-7,2'-dihydroxy-3',4'-dimethoxyisoflavan (11), astragaloside I (12), isoastragaloside I (13), E-ligustilide (14), and Z-ligustilide (15), respectively. Among all permeable components, 1, 3, 6, and 9 (flavonoids), 2, 14, and 15 (phthalides), and 7 (saponins) have been considered as major bioactive components in CPDBD. Therefore, this new method appears useful as a first step in the screening of bioactive components in natural products including Traditional Chinese Medicines (TCMs).
Collapse
Affiliation(s)
- Lian-Wen Qi
- Key Laboratory of Modern Chinese Medicines, Department of Pharmacognosy, China Pharmaceutical University, Nanjing, PR China
| | | | | | | | | | | | | |
Collapse
|
15
|
Shimanouchi T, Walde P, Gardiner J, Mahajan YR, Seebach D, Thomae A, Krämer SD, Voser M, Kuboi R. Permeation of a beta-heptapeptide derivative across phospholipid bilayers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1768:2726-36. [PMID: 17714685 DOI: 10.1016/j.bbamem.2007.07.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Revised: 06/28/2007] [Accepted: 07/05/2007] [Indexed: 11/30/2022]
Abstract
Based on a number of experiments it is concluded that the fluorescein labeled beta-heptapeptide fluoresceinyl-NH-CS-(S)-beta(3)hAla-(S)-beta(3)hArg-(R)-beta(3)hLeu-(S)-beta(3)hPhe-(S)-beta(3)hAla-(S)-beta(3)hAla-(S)-beta(3)hLys-OH translocates across lipid vesicle bilayers formed from DOPC (1,2-dioleoyl-sn-glycero-3-phosphocholine). The conclusion is based on the following observations: (i) addition of the peptide to the vicinity of micrometer-sized giant vesicles leads to an accumulation of the peptide inside the vesicles; (ii) if the peptide is injected inside individual giant vesicles, it is released from the vesicles in a time dependent manner; (iii) if the peptide is encapsulated within sub-micrometer-sized large unilamellar vesicles, it is released from the vesicles as a function of time; (iv) if the peptide is submitted to immobilized liposome chromatography, the peptide is retained by the immobilized DOPC vesicles. Furthermore, the addition of the peptide to calcein-containing DOPC vesicles does not lead to significant calcein leakage and vesicle fusion is not observed. The finding that derivatives of the beta-heptapeptide (S)-beta(3)hAla-(S)-beta(3)hArg-(R)-beta(3)hLeu-(S)-beta(3)hPhe-(S)-beta(3)hAla-(S)-beta(3)hAla-(S)-beta(3)hLys-OH can translocate across phospholipid bilayers is supported by independent measurements using Tb(3+)-containing large unilamellar vesicles prepared from egg phosphatidylcholine and wheat germ phosphatidylinositol (molar ratio of 9:1) and a corresponding peptide that is labeled with dipicolinic acid instead of fluorescein. The experiments show that this dipicolinic acid labeled beta-heptapeptide derivative also permeates across phospholipid bilayers. The possible mechanism of the translocation of the particular beta-heptapeptide derivatives across the membrane of phospholipid vesicles is discussed within the frame of the current understanding of the permeation of certain oligopeptides across simple phospholipid bilayers.
Collapse
Affiliation(s)
- Toshinori Shimanouchi
- Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Preparation of an ion-exchangeable polymer bead wrapped with bilayer membrane structures for high performance liquid chromatography. Anal Chim Acta 2007; 589:76-83. [PMID: 17397656 DOI: 10.1016/j.aca.2007.02.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Revised: 10/26/2006] [Accepted: 02/19/2007] [Indexed: 10/23/2022]
Abstract
We synthesized a chromatographic packing material that has a non-covalently attached dihexadecyl phosphate (DHP) bilayer membrane structure on a CA08S, a nonporous-type cationic polymer bead with a diameter ranging from 11 to 14 microm. Confocal fluorescence microscopic and differential scanning calorimetric analyses of the DHP-CA08S complex revealed that the DHP bilayer membrane structures were formed on the surface of the CA08S polymer beads. When the functionality of the DHP-CA08S complex was evaluated in the ion-exchange HPLC of proteins, the retention behavior of the proteins on the DHP-CA08S complex column totally mirrored the anionic property of the DHP bilayer membrane surface, not the cationic property of the CA08S bead. Methylene blue (MB) was eluted from the DHP-CA08S complex column in the isocratic elution mode, but not at all from a CK08S column, a styrene-divinylbenzene based cation-exchange polymer. When the column temperature was elevated from 50 to 60 degrees C, the peak shape of MB on the DHP-CA08S complex column became fairly sharp without a change in its peak area, which mirrored the characteristic phase transition of the DHP bilayer membrane formed on the DHP-CA08S complex.
Collapse
|
17
|
Liu XY, Nakamura C, Tanimoto I, Miyake S, Nakamura N, Hirano T, Miyake J. High sensitivity detection of bisphenol A using liposome chromatography. Anal Chim Acta 2006; 578:43-9. [PMID: 17723693 DOI: 10.1016/j.aca.2006.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Revised: 06/28/2006] [Accepted: 07/10/2006] [Indexed: 11/30/2022]
Abstract
An antibody column in tandem with a fluorescent dye entrapped liposome column was developed for highly sensitive detection of an endocrine disruptor, bisphenol A (BPA). Anti-BPA antibody was immobilized in a protein G column with orientation control. A derivative of BPA was conjugated to phospholipase A2 (PLA2). BPA sample solutions mixed with the BPA-PLA2 conjugates were injected on to the anti-BPA antibody column and competitive binding occurred in the antibody column. The amount of the free conjugate was proportional to the concentration of the BPA sample. The eluted conjugates were injected on to the second column gel on which calcein-entrapped liposomes were immobilized and the PLA2-catalyzed hydrolysis of liposomal phospholipids causing fluorescent dye leakage as a signal amplification. In this system, the mixture of BPA and BPA-PLA2 conjugate were incubated for 60 min in the anti-BPA column, and then the collected solution was applied to the liposome column. The BPA detection range of 0.02-140 ng mL(-1) was wider than 0.03-6.6 ng mL(-1) obtained by the method of competitive ELISA using the same antibody. Moreover, this system could be adapted to an HPLC system resulting in almost the same detection limit in online detection. The method could be applied to environmental samples, river water and soil extracts. The BPA concentration of 0.1 ng mL(-1) and 10 ng g(-1) was detectable in water and soil extract, respectively.
Collapse
Affiliation(s)
- Xue-Ying Liu
- Research Institute for Cell Engineering, National Institute of Advanced Industrial Science and Technology (AIST), 3-11-46 Nakoji, Amagasaki, Hyogo 661-0974, Japan
| | | | | | | | | | | | | |
Collapse
|
18
|
Morita S, Nukui M, Kuboi R. Immobilization of liposomes onto quartz crystal microbalance to detect interaction between liposomes and proteins. J Colloid Interface Sci 2006; 298:672-8. [PMID: 16413570 DOI: 10.1016/j.jcis.2005.12.043] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2005] [Revised: 11/16/2005] [Accepted: 12/20/2005] [Indexed: 11/18/2022]
Abstract
To study the interaction between liposomes and proteins, intact liposomes were immobilized on a metal planar support by chemical binding and/or bioaffinity using a quartz crystal microbalance (QCM). A large decrease in the resonance frequency of quartz crystal was observed when the QCM, modified by a self-assembled monolayer (SAM) of carboxythiol, was added to liposome solutions. The stable chemical immobilization of intact liposomes onto SAM was judged according to the degree with which adsorbed mass depended on the prepared size of liposomes, as well as on the activation time of SAMs when amino-coupling was introduced, where the liposome coverage of electrodes was 69+/-8% in optimal conditions. When avidin-biotin binding was used on amino-coupling liposome layers, liposome immobilization finally reached 168% coverage of the electrode surface. Denatured protein was also successfully detected according to the change in the frequency of the liposome-immobilized QCM. The adsorbed mass of denatured carbonic anhydrase from bovine onto immobilized liposomes showed a characteristic peak at a concentration of guanidine hydrochloride that corresponded to a molten globule-like state of the protein, although the mass adsorbed onto deactivated SAM increased monotonously.
Collapse
Affiliation(s)
- Seiichi Morita
- Department of Materials Science, Wakayama National College of Technology, Noshima 77, Nada-cho, Gobo, Wakayama 644-0023, Japan.
| | | | | |
Collapse
|
19
|
Evaluation of temperature and guanidine hydrochloride-induced protein–liposome interactions by using immobilized liposome chromatography. Biochem Eng J 2006. [DOI: 10.1016/j.bej.2005.08.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
20
|
Lee TH, Aguilar MI. Trends in the development and application of functional biomembrane surfaces. BIOTECHNOLOGY ANNUAL REVIEW 2006; 12:85-136. [PMID: 17045193 DOI: 10.1016/s1387-2656(06)12004-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Tzong-Hsien Lee
- Department of Biochemistry and Molecular Biology, Monash University, Victoria 3800, Australia
| | | |
Collapse
|
21
|
Liu XY, Nakamura C, Nakamura N, Hirano T, Shinbo T, Miyake J. Detection of polychlorinated biphenyls using an antibody column in tandem with a fluorescent liposome column. J Chromatogr A 2005; 1087:229-35. [PMID: 16130718 DOI: 10.1016/j.chroma.2005.03.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Phospholipase A2 (PLA2)-catalyzed membrane leakage can be detected by immobilized liposomes containing a self-quenching fluorescent dye, 3,3-bis[N,N-di(carboxymethyl)aminomethyl]fluorescein (calcein). This enzymatic reaction was applied as signal amplification for biosensor detection of low concentrations of polychlorinated biphenyls (PCBs). In order to increase the fluorescent signal for improvement of PCBs detection, the effect of BSA on optimal lipid composition for PLA2-catalyzed membrane leakage from fluorescent liposomes has been investigated in this report. Various kinds of calcein-entrapped liposomes were immobilized in Sephacryl S1000 gel beads using avidin-biotin binding. In a contrast, free calcein was removed by size exclusion chromatography on Sephacryl S300 for free liposome suspensions. The PLA2-catalyzed membrane leakage was detected both in these gel-bead-immobilized liposomes and in free liposome suspensions. In both systems, the fluorescent release from the liposomes by PLA2 hydrolytic action significantly increased with increasing albumin concentration. The most rapid and greatest membrane leakage by PLA2 hydrolysis was found in anionic liposomes in the presence of albumin, both in free liposome suspensions and gel-bead-immobilized liposomes. Finally, the stabilities of various free liposomes and gel-bead-immobilized liposomes were monitored. Immobilized 1-palmitoy-2-oleoylphosphatidylcholine (POPC)/1-palmitoy-2-oleoylphosphatidylglycerol (POPG) liposome gel was chosen due to its excellent stability and large dye leakage by PLA2. A concentration of PCBs as low as 0.1 ng/mL was detectable using this tandem column system.
Collapse
Affiliation(s)
- Xue-Ying Liu
- Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology, Center 6th, 111 Higashi, Tsukuba 305-8566, Japan
| | | | | | | | | | | |
Collapse
|
22
|
Sheng LH, Li SL, Kong L, Chen XG, Mao XQ, Su XY, Zou HF, Li P. Separation of compounds interacting with liposome membrane in combined prescription of traditional Chinese medicines with immobilized liposome chromatography. J Pharm Biomed Anal 2005; 38:216-24. [PMID: 15925211 DOI: 10.1016/j.jpba.2005.01.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2004] [Revised: 01/09/2005] [Accepted: 01/14/2005] [Indexed: 11/17/2022]
Abstract
Immobilized liposome chromatography (ILC), the stationary phase of which has been regarded as a mimic biomembranes system was used to separate and analyze compounds interacting with liposome membrane in Danggui Buxue decoction, a combined prescription of traditional Chinese medicines (CPTCMs), and its compositions Radix Astragli and Radix Angelica Sinensis. More than 10 main peaks in the extract of Danggui Buxue decoction were resolved on the ILC column, suggesting that more than 10 components in the prescription have significant retention on ILC column. Ligustilide, astragaloside IV and formononetin, three main bioactive ingredients in Danggui Buxue decoction, were found to have relatively significant, while ferulic acid, another bioactive ingredient in the prescription, relatively weak retention on ILC column. Effects of the eluent pH and amount of immobilized phosphatidylcholine (PC) on separation of interactional compounds in the extract of Danggui Buxue decoction were also investigated. It was found that these two factors strongly affected the retention of some interactional compounds. In addition, the fractions partitioned with different solvents from water extract of this combined prescription were evaluated with this ILC column system.
Collapse
Affiliation(s)
- Liang-Hong Sheng
- National Chromatographic R&A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 161 Zhongshan Road, Dalian 116011, China.
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Gómez-Hens A, Manuel Fernández-Romero J. The role of liposomes in analytical processes. Trends Analyt Chem 2005. [DOI: 10.1016/j.trac.2004.07.017] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
24
|
Wiedmer SK, Riekkola ML, Jussila MS. Phospholipids and liposomes in liquid chromatographic and capillary electromigration techniques. Trends Analyt Chem 2004. [DOI: 10.1016/j.trac.2004.03.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
25
|
Khaleque MA, Okumura Y, Yabushita S, Mitani M. Detachable immobilization of liposomes on polymer gel particles. Colloids Surf B Biointerfaces 2004; 37:35-42. [PMID: 15450306 DOI: 10.1016/j.colsurfb.2004.06.008] [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] [Received: 04/09/2004] [Accepted: 06/26/2004] [Indexed: 11/25/2022]
Abstract
Immobilization of liposomes on hydrophobized Sephacryl gel and controlled detachment of the liposomes from the gel were examined. The gel was chemically modified and bore octyl, hexadecyl or cholesteryl moiety via disulfide linkage as anchors to liposomal bilayer membrane. Upon interaction with the gel, egg phosphatidylcholine liposomes were successfully immobilized onto the gel. The gel with cholesteryl moiety showed 1.7 times higher liposome immobilization per anchor moiety than the gels with the alkyl moieties. The immobilization of liposomes on the gel was stable, and no significant spontaneous detachment of phospholipid or leakage of fluorescein isothiocyanate-conjugated dextran encapsulated in the immobilized liposomes was observed in 24h. Reductive cleavage of the disulfide linkage by dithiothreitol resulted in detachment of the liposomes from the gel. The majority of the detached liposomes were found encapsulating the dextran derivative, and these liposomes should have kept their structural integrity throughout the immobilization and the detachment processes. The release of the liposomes was insignificant until the ratio of the dithiothreitol to the hydrophobic anchor reached a threshold. The presence of the threshold suggests that the immobilization of liposomes should require a certain minimum number of the hydrophobic moieties anchored in the liposomal membrane. By applying the present immobilization-detachment system, preparation of liposomes encapsulating the dextran derivative without using costly gel filtration or ultracentrifugation procedure was successfully demonstrated.
Collapse
Affiliation(s)
- Md Abdul Khaleque
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | | | | | | |
Collapse
|
26
|
Boija E, Lundquist A, Martínez Pla JJ, Engvall C, Lundahl P. Effects of ions and detergents in drug partition chromatography on liposomes. J Chromatogr A 2004; 1030:273-8. [PMID: 15043279 DOI: 10.1016/j.chroma.2003.11.060] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We have determined drug partitioning into phospholipid bilayers by immobilized-liposome chromatography (ILC). Electrostatic effects on the drug partitioning were observed on neutral bilayers at low ionic strength. The size of the counterions affected the partitioning. When liposomes were supplemented with ionic detergents the partitioning of charged drugs was strongly affected, allowing complete separation of drugs of different charges which showed similar retention on neutral bilayers. Partial separation was obtained on bilayers containing fatty acid. Detergent ions or fatty acid inserted into phospholipid bilayers affected the partitioning of drugs much more than did free ions or phospholipid head group charges.
Collapse
Affiliation(s)
- Elisabet Boija
- Department of Biochemistry, Biomedical Center, Uppsala University, Box 576, SE-75123 Uppsala, Sweden.
| | | | | | | | | |
Collapse
|
27
|
Hu W, Haddad PR, Tanaka K, Mori M, Tekura K, Hasebe K, Ohno M, Kamo N. Creation and characteristics of phosphatidylcholine stationary phases for the chromatographic separation of inorganic anions. J Chromatogr A 2003; 997:237-42. [PMID: 12830897 DOI: 10.1016/s0021-9673(03)00086-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
New stationary phases for chromatographic separation of anions, obtained by loading liposomes made from dimyristolyphosphatidylcholine (DMPC) onto reversed-phase packed columns (C18 and C30) are reported. Mono- and divalent anions were used as model analyte ions and retention data for these species were obtained using the DMPC stationary phases and used to elucidate the separation mechanisms involved in this chromatographic system. The DMPC stationary phases can separate anions by either a solvation-dependent mechanism or an electrostatic ion-exchange mechanism, depending upon the relative magnitudes of the negative electrostatic potential (Psi(-)) of the phosphate moiety (P-) and the positive electrostatic potential (Psi(+)) of the quaternary ammonium groups (N+) on the headgroup of DMPC. If Psi(+) > Psi(-), such as in case where Psi(-) has been reduced either by binding of eluent cations (e.g., H+ or divalent cations) onto the P- group of DMPC or by steric screening when a C30 reversed-phase material was used to support the DMPC, then the overall electrostatic surface potential (and hence also the effective anion-exchange capacity) was generally large and the anions were separated on the basis of an electrostatic mechanism. However, if Psi(+) was similar to Psi(-), such as in the case of using a C18 reversed-phase support and monovalent cations as eluent cations, then the overall electrostatic surface potential and the effective anion-exchange capacity were very small and the analyte anions were separated on the basis of a solvation-dependent mechanism. The DMPC stationary phases were found to be suitable for the direct determination of iodide and thiocyanate in highly saline water samples, such as seawater samples.
Collapse
Affiliation(s)
- Wenzhi Hu
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Mao X, Kong L, Li X, Guo B, Zou H. Unilamellar liposomes covalently coupled on silica gel for liquid chromatography. Anal Bioanal Chem 2003; 375:550-5. [PMID: 12610709 DOI: 10.1007/s00216-002-1721-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2002] [Revised: 10/31/2002] [Accepted: 11/25/2002] [Indexed: 11/27/2022]
Abstract
Silica gel was used as a support for the covalent coupling of liposomes, which could overcome drawbacks of soft gel beads in column efficiency and separation speed. The influences of the concentration of added dimethylaminopyridine and reaction time on the chloroformate activation reaction of silica gel were investigated. Temperature and pH for covalent coupling of liposomes on the activated silica gel were also optimized. Experimental results indicated that the stability of the covalently coupled liposome columns was obviously superior to that of the noncovalently coated liposome columns but the selectivity of both columns was basically identical. Separation and analysis of a crude extract of a traditional Chinese medicine Ligusticum Wallichii and a mixture of small peptides on both columns further support this conclusion.
Collapse
Affiliation(s)
- Xiqin Mao
- National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116011, Dalian, China
| | | | | | | | | |
Collapse
|
29
|
Liu XY, Nakamura C, Yang Q, Kamo N, Miyake J. Immobilized liposome chromatography to study drug-membrane interactions. Correlation with drug absorption in humans. J Chromatogr A 2002; 961:113-8. [PMID: 12186381 DOI: 10.1016/s0021-9673(02)00505-8] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
For rapid screening of drug-membrane interactions and predicting drug absorption in vivo, unilamellar liposomes were stably immobilized in the pores of gel beads by avidin-biotin binding. Interactions of a diverse set of well-described drugs with the immobilized liposomal membranes were reflected by their elution profiles. The membrane partitioning coefficients (KLM) of the drugs were determined from the retention volumes. The drug retentions on egg phosphatidylcholine (EPC)-phosphatidylserine (PS)-cholesterol (chol) and EPC-PS-phosphatidylethanolamine (PE)-chol columns intended to mimic small intestine membranes were similar, although the positively-charged drugs were more strongly retarded on the negatively-charged liposomes than the negatively-charged drugs. The relationship between log KLM with the drug fraction absorbed in humans showed that the log KLM values obtained with unilamellar liposomes can be used to predict drug passive transcellular absorption, similarly to that previously shown for entrapped multilamellar liposomes. The immobilized liposome chromatography method should be useful for screening compounds at an early stage of the drug discovery process. The avidin-biotin immobilization of the liposomes prolongs the lifetime of the columns.
Collapse
Affiliation(s)
- Xue-Ying Liu
- Tissue Engineering Research Center, National Institute for Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | | | | | | | | |
Collapse
|
30
|
Félix MM, Umakoshi H, Shimanouchi T, Yoshimoto M, Kuboi R. Evaluation of interaction between liposome membranes induced by stimuli responsive polymer and protein. J Biosci Bioeng 2002; 93:498-501. [PMID: 16233238 DOI: 10.1016/s1389-1723(02)80098-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2001] [Accepted: 01/28/2002] [Indexed: 11/16/2022]
Abstract
Immobilized liposome chromatography was utilized as a novel method for the quantitative evaluation of the interaction between liposome membranes. The capacity factors evaluated from the elution profile showed that interaction between 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) liposome membranes occurred in the presence of a stimuli responsive polymer and protein under specific stimulus conditions. The occurrence of such interaction was supported by experimental results for POPC liposome membrane fusion under corresponding stimuli conditions.
Collapse
Affiliation(s)
- Matundu Menayame Félix
- Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan
| | | | | | | | | |
Collapse
|
31
|
Gottschalk I, Lagerquist C, Zuo SS, Lundqvist A, Lundahl P. Immobilized-biomembrane affinity chromatography for binding studies of membrane proteins. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 768:31-40. [PMID: 11939556 DOI: 10.1016/s0378-4347(01)00483-2] [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: 10/27/2022]
Abstract
Analyses of specific interactions between solutes and a membrane protein can serve to characterize the protein. Frontal affinity chromatography of an interactant on a column containing the membrane protein immobilized in a lipid environment is a simple and robust approach for series of experiments with particular protein molecules. Regression analysis of the retention volumes at a series of interactant concentrations shows the affinity of the protein for the interactant and the amount of active binding sites. The higher the affinity, the fewer sites are required to give sufficient retention. Competition experiments provide the affinities of even weakly binding solutes and the non-specific retention of the primary interactant. Hummel and Dreyer size-exclusion chromatography allows complementary analyses of non-immobilized membrane materials. Analyses of the human facilitative glucose transporter GLUT1 by use of the inhibitor cytochalasin B (radioactively labeled) and the competitive substrate D-glucose (non-labeled) showed that GLUT1 interconverted between two states, exhibiting one or two cytochalasin B-binding sites per two GLUTI monomers, dependent on the membrane composition and environment. Similar analyses of a nucleoside transporter, a photosynthetic reaction center, nicotinic acetylcholine receptors and a P-glycoprotein, alternative techniques, and immobilized-liposome chromatographic approaches are presented briefly.
Collapse
Affiliation(s)
- Ingo Gottschalk
- Department of Biochemistry, Biomedical Center, Uppsala University, Sweden
| | | | | | | | | |
Collapse
|
32
|
Liu XY, Nakamura C, Yang Q, Miyake J. Phospholipase A(2)-catalyzed membrane leakage studied by immobilized liposome chromatography with online fluorescent detection. Anal Biochem 2001; 293:251-7. [PMID: 11399040 DOI: 10.1006/abio.2001.5136] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Unilamellar liposomes composed of phosphatidylcholine with an entrapped self-quenching fluorescent dye, calcein, were immobilized in chromatographic gel beads by avidin-biotin binding. Bee venom phospholipase A(2) (PLA(2)) was applied in a small amount onto the immobilized liposome column. The release of calcein from the immobilized liposomes resulting from the catalyzed hydrolysis of the phospholipids was detected online by immobilized liposome chromatography (ILC) using a flow fluorescent detector. The PLA(2)-catalyzed membrane leakage of the immobilized liposomes as studied with ILC was found to be affected by the gel pore size used for immobilization, by liposome size, and as expected by the concentration of calcium, but was unaffected by the flow rate of ILC. The largest PLA(2)-induced calcein release from the liposome column was detected on large unilamellar liposomes immobilized on TSK G6000PW or Sephacryl S-1000 gel in the presence of 1 mM Ca(2+) in the aqueous mobile phase. Comparison with the PLA(2)-catalyzed membrane leakage in free liposome suspensions, we conclude that the fluorescent leakage from liposomes hydrolyzed by PLA(2) can be rapidly and sensitively detected by ILC runs using large amount of immobilized liposomes with entrapped fluorescent dye.
Collapse
Affiliation(s)
- X Y Liu
- Tissue Engineering Research Center, National Institute for Advanced Inudstrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki, 305-8562, Japan
| | | | | | | |
Collapse
|
33
|
Liu XY, Yang Q, Kamo N, Miyake J. Effect of liposome type and membrane fluidity on drug–membrane partitioning analyzed by immobilized liposome chromatography. J Chromatogr A 2001; 913:123-31. [PMID: 11355804 DOI: 10.1016/s0021-9673(00)01266-8] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Immobilized liposome chromatography (ILC) has been proven to be a useful method for the study or rapid screening of drug-membrane interactions. To obtain an adequate liposomal membrane phase for ILC, unilamellar liposomes were immobilized in gel beads by avidin-biotin binding. The retardation of 15 basic drugs on the liposome column could be converted to membrane partitioning coefficients, K(LM). The effects of small or large unilamellar liposomes and multilamellar liposomes on the drug-membrane partitioning were compared. The K(LM) values for both small and large liposomes were similar, but higher than those for the multilamellar liposomes. The basic drugs showed stronger partitioning into negatively charged liposomes than into either neutral liposomes or positively charged liposomes. The membrane fluidity of the immobilized liposomes was modulated by incorporating cholesterol into the liposomal membranes, by changing the acyl chain length and degree of unsaturation of the phospholipids, and by changing the temperature for ILC runs. Our data show that K(LM) obtained using ILC correlated well with those reported by batch studies using free liposomes. It is concluded that negatively charged or cholesterol-containing large unilamellar liposomes are suitable models for the ILC analysis of drug-membrane interactions.
Collapse
Affiliation(s)
- X Y Liu
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | | | | | | |
Collapse
|
34
|
Osterberg T, Svensson M, Lundahl P. Chromatographic retention of drug molecules on immobilised liposomes prepared from egg phospholipids and from chemically pure phospholipids. Eur J Pharm Sci 2001; 12:427-39. [PMID: 11231109 DOI: 10.1016/s0928-0987(00)00183-4] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The partitioning of a chemically diverse set of drugs into liposomes was studied by immobilised liposome chromatography (ILC). For this purpose liposomes composed of (i) purified egg phospholipids (EPL), (ii) synthetic phosphatidylcholine (PC), (iii) PC--synthetic phosphatidylethanolamine (PE) 80:20 (mol/mol) and (iv) PC--synthetic phosphatidylserine (PS) 80:20 (mol/mol) were immobilised in gel beads by freeze-thawing. The drug partitioning was assessed from the retention volume, which was expressed as a capacity factor, K(s), normalised with respect to the amount of immobilised phospholipid. The drug retention on EPL, PC and PC--PE liposomes was very similar, whereas the negatively charged PC--PS liposomes increased the retention of positively charged and decreased retention of negatively charged drugs. The partitioning of drugs on liposome columns (log K(s)) versus their octanol--water partitioning (log P(oct)) showed three separate rectilinear relationships, depending on the charge of the compound (neutral, positive, or negative). Statistical analysis (ANCOVA) proved that the lines had similar slopes. Repeated analysis of four reference compounds showed a low variation (<0.12 log units) over time (about 250 days). A close relationship was observed between the drug retention in short EPL columns with a low content of phospholipids and the retention in longer standard EPL columns. The short 'quick screen bilayer columns' permit analysis of highly lipophilic compounds within 30 min and are thus applicable for medium-throughput screening in drug discovery settings. A very strong rectilinear relationship (r(2)=0.95, n=13) between log K(s) (EPL) and published liposome partitioning data (log D(mem)) confirmed that the ILC drug retention reflects the drug partitioning into the lipid bilayers. A moderate to fair rectilinear relationship was observed between the normalised retention on PC, PC-PE and EPL liposomes (r(2)=0.79, 0.86 and 0.85, respectively, n=24) and corresponding published log k'(IAM) data obtained on immobilised artificial membrane (IAM) columns. Transport across Caco-2 cell monolayers (log P(c)) showed curvilinear relationships with log K(s), log k'(IAM), log P(oct) and log D(oct). The drug fraction absorbed in humans showed a similar relationship to log K(s) values as to surface plasmon resonance signals representing drug-liposome interaction (Danelian et al., 2000 J Med Chem, 43, 2083--2086).
Collapse
Affiliation(s)
- T Osterberg
- AstraZeneca R&D Södertälje, SE-151 85 Södertälje, Sweden.
| | | | | |
Collapse
|
35
|
Liu X, Yang Q, Nakamura C, Miyake J. Avidin-biotin-immobilized liposome column for chromatographic fluorescence on-line analysis of solute-membrane interactions. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 750:51-60. [PMID: 11204223 DOI: 10.1016/s0378-4347(00)00427-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Unilamellar liposomes with entrapped fluorescent dye calcein were stably immobilized in gel beads by avidin-biotin-binding. The immobilized liposomes remained extremely stable upon storage and chromatographic runs. The immobilized calcein-entrapped liposomes were utilized for fluorescent analysis of solute-membrane interactions, which in some cases are too weak to be detected by chromatographic retardation. A liposome column was used as a sensitive probe to detect the interactions of membranes with pharmaceutical drugs, peptides and proteins. Retardation of the solutes was monitored using a UV detector. Perturbation of the membranes, reflected as leakage of the entrapped calcein by some of the solutes, can thus be detected on-line using a flow-fluorescent detector. For the amphiphilic drugs or synthetic peptides, perturbation of membranes became more pronounced when the retardation (hydrophobicity) of the molecules increased. On the other hand, in the case of positively-charged peptides, polylysine, or partially denatured bovine carbonic anhydrase, significant dye leakage from the liposomes was observed although the retardation was hardly to be measured. Weak protein-membrane interactions can thus be assumed from the large leakage of calcein from the liposomes. This provides additional useful information for solute-membrane interactions, as perturbation of the membranes was also indicated by avidin-biotin-immobilized liposome chromatography (ILC).
Collapse
Affiliation(s)
- X Liu
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | | | | | | |
Collapse
|
36
|
Hara M, Yuan H, Miyake M, Iijima S, Yang Q, Miyake J. Amphiphilic polymer–liposome interaction: a novel immobilization technique for liposome on gel surface. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2000. [DOI: 10.1016/s0928-4931(00)00185-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
37
|
Yang Q, Liu XY, Umetani K, Ikehara T, Miyauchi S, Kamo N, Jin T, Miyake J. Membrane Partitioning and Translocation of Hydrophobic Phosphonium Homologues: Thermodynamic Analysis by Immobilized Liposome Chromatography. J Phys Chem B 2000. [DOI: 10.1021/jp001237k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qing Yang
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Xue-Ying Liu
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Koujirou Umetani
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Tatsuya Ikehara
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Seiji Miyauchi
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Naoki Kamo
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Takashi Jin
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| | - Jun Miyake
- National Institute for Advanced Interdisciplinary Research, Agency of Industrial Science and Technology, 1-1-4 Higashi, Tsukuba, Ibaraki 305, Japan; Laboratory of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan; and Institute of Electrical Sciences, Hokkaido University, Sapporo 060-0812
| |
Collapse
|
38
|
Shimanouchi T, Morita S, Umakoshi H, Kuboi R. Stimuli-responsive separation of proteins using immobilized liposome chromatography. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 743:85-91. [PMID: 10942275 DOI: 10.1016/s0378-4347(00)00061-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The possibility of the stimuli-responsive separation of proteins was investigated using immobilized liposome chromatography (ILC) as novel aqueous two-phase systems. The specific capacity factor (k(s)) of beta-galactosidase, obtained by analysis of ILC, was varied by changing the pH of the solution and was maximized at the specific pH of 5 (k(s),max = 5.57). The k(s) values were found to correspond well with their local hydrophobicities, which can be determined by the aqueous two-phase partitioning method. The variation of k(s), therefore, indicates a change in the surface properties of a protein during conformational change under pH stimuli. A similar phenomenon is observed in the case of other proteins (alpha-glucosidase, k(s),max = 11.3 at pH 4; carbonic anhydrase from bovine, k(s),max = 6.53 at pH 4). The difference in the height and/or the position of the peaks of the ks-pH curves of each protein suggests a difference in their pH denaturation in the ILC column. Based on these results, the mutual separation of the above proteins at pH 4 could be successfully performed by selecting their specific capacity factor as a design parameter.
Collapse
Affiliation(s)
- T Shimanouchi
- Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Japan
| | | | | | | |
Collapse
|
39
|
Yoshimoto M, Shimanouchi T, Umakoshi H, Kuboi R. Immobilized liposome chromatography for refolding and purification of protein. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 743:93-9. [PMID: 10942276 DOI: 10.1016/s0378-4347(00)00051-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Small unilamellar liposomes were utilized as a kind of aqueous two-phase system and artificial chaperone which specifically recognize protein conformation with fluctuated structure. Liposomes showed highly selective binding ability to conformationally changed proteins treated with various concentrations of guanidinium hydrochloride, as evaluated by immobilized liposome chromatography (ILC). In refolding of proteins, liposomes bound to refolding intermediate of proteins and prevented them from forming intermolecular aggregates. Refolding of bovine carbonic anhydrase, lysozyme and ribonuclease A was significantly improved in the presence of liposomes. Furthermore, by utilizing ILC, refolding of proteins was also successfully and simply carried out with considerable high reactivation yield.
Collapse
Affiliation(s)
- M Yoshimoto
- Department of Chemical Science and Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Japan
| | | | | | | |
Collapse
|
40
|
Yang Q, Liu XY, Hara M, Lundahl P, Miyake J. Quantitative affinity chromatographic studies of mitochondrial cytochrome c binding to bacterial photosynthetic reaction center, reconstituted in liposome membranes and immobilized by detergent dialysis and avidin--biotin binding. Anal Biochem 2000; 280:94-102. [PMID: 10805526 DOI: 10.1006/abio.1999.4474] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In order to study the affinity binding of c-type cytochromes to the photosynthetic reaction center (RC) by quantitative affinity chromatography (QAC), RC from Rhodobacter sphaeroides was reconstituted into liposomes composed of egg phosphatidylcholine (EPC) and 2 mol% of biotinyl phosphatidylethanolamine simultaneously as the liposomes were formed and immobilized in (strept)avidin-coupled gel beads by rotary detergent dialysis. The immobilized amount was up to 80 nmol of RC and 33 micromol of lipid/g of moist gel in streptavidin-coupled Sephacryl S-1000 gel. By QAC frontal runs, retardation of mitochondrial cyt c on immobilized RC liposome columns was demonstrated. The dissociation constant for the RC-cyt c interaction was determined to be 0.20-0.57 microM. QAC studies also allowed evaluation of the orientation of reconstituted RC in immobilized liposomes by comparison of the total amount of cyt c binding sites with the amount of available binding sites obtained by QAC. It seems that the RC proteoliposomes immobilized in Sephacryl S-1000 gel exposed the cyt c binding sites on the outer surface of the liposomes due to effects of the gel network pore size and the resulting liposomal size.
Collapse
Affiliation(s)
- Q Yang
- National Institute for Advanced Interdisciplinary Research, Tsukuba, Ibaraki, Japan.
| | | | | | | | | |
Collapse
|