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Ruokonen SK, Ekholm FS, Wiedmer SK. Assessing the Interactions of Auristatin Derivatives with Mixed Phospholipid-Sodium Dodecyl Sulfate Aggregate Dispersions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5232-5240. [PMID: 30889955 PMCID: PMC6727603 DOI: 10.1021/acs.langmuir.9b00116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 03/09/2019] [Indexed: 06/09/2023]
Abstract
The aim of this study was to assess what properties of the pseudostationary phases in electrokinetic capillary chromatography affect the interactions between monomethyl auristatin E (MMAE) and hydrophilically modified structural analogues thereof with various lipophilic phases. MMAE is a widely used cytotoxic agent in antibody-drug conjugates (ADC), which are used as selective biopharmaceutical drugs in the treatment of cancers. MMAE and its derivatives are highly lipophilic, yet they fail to interact with biomimicking phosphatidylcholine-phosphatidylserine liposomes. To reveal what properties affect the interaction of the auristatin derivatives with cell plasma membrane-mimicking vesicles, capillary electrokinetic chromatography was used with four different types of micellar and vesicular pseudostationary phases: pure vesicles, mixed vesicles, mixed micelles, and pure micelles. Vesicular phases were composed of pure phospholipids [dimyristoylphosphatidylcholine (DMPC) and dilauroylphosphatidylcholine (DLPC)] and phospholipid-surfactant mixtures [sodium dodecyl sulfate, (SDS) with DMPC and DLPC] while the micellar phases comprised pure surfactant (SDS) and surfactant-phospholipid mixtures (SDS-DMPC and SDS-DLPC). In addition, differential scanning calorimetry and dynamic light scattering were used to monitor the aggregate composition. Our data shows that the interaction between hydrophobic auristatin derivatives and hydrophobic pseudostationary phases critically depends on the type, size, and hydrogen bonding capability of the pseudostationary phases.
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Affiliation(s)
- Suvi-Katriina Ruokonen
- Department
of Chemistry, A. I. Virtasen
aukio 1, POB 55, 00014 University of Helsinki, Helsinki, Finland
| | - Filip S. Ekholm
- Department
of Chemistry, A. I. Virtasen
aukio 1, POB 55, 00014 University of Helsinki, Helsinki, Finland
- Glykos Finland Ltd., Viikinkaari 6, 00790 Helsinki, Finland
| | - Susanne K. Wiedmer
- Department
of Chemistry, A. I. Virtasen
aukio 1, POB 55, 00014 University of Helsinki, Helsinki, Finland
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2
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Penny WM, Steele HB, Ross JBA, Palmer CP. Phospholipid bilayer affinities and solvation characteristics by electrokinetic chromatography with a nanodisc pseudostationary phase. Electrophoresis 2017; 38:738-746. [PMID: 27859480 PMCID: PMC5500191 DOI: 10.1002/elps.201600381] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/12/2016] [Accepted: 10/17/2016] [Indexed: 12/21/2022]
Abstract
Phospholipid bilayer nanodiscs composed of 1,2-dimyristoyl-sn-glycero-3-phosphocholine and synthetic maleic acid-styrene copolymer belts have been introduced as a pseudostationary phase (PSP) in electrokinetic chromatography and demonstrated good performance. The nanodiscs provide a suitable migration range and high theoretical plate counts. Using this nanodisc pseudostationary phase, the affinity of the bilayer structure for probe solutes was determined and characterized. Good correlation is observed between retention factors and octanol water partition coefficients for particular categories of solutes, but the general correlation is weak primarily because the nanodiscs show stronger affinity than octanol for hydrogen bond donors. This suggests that a more appropriate application of this technology is to measure and characterize interactions between solutes and lipid bilayers directly. Linear solvation energy relationship analysis of the nanodisc-solute interactions in this study demonstrates that the nanodiscs provide a solvation environment with low cohesivity and weak hydrogen bond donating ability, and provide relatively strong hydrogen bond acceptor strength.
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Affiliation(s)
- William M Penny
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
| | - Harmen B Steele
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
| | - J B Alexander Ross
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
| | - Christopher P Palmer
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
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3
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Ban E, Yoo YS, Song EJ. Analysis and applications of nanoparticles in capillary electrophoresis. Talanta 2015; 141:15-20. [DOI: 10.1016/j.talanta.2015.03.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 03/13/2015] [Accepted: 03/14/2015] [Indexed: 10/23/2022]
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4
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Cao W, Hu SS, Ying XZ, Ye LH, Cao J. Surfactant-coated graphitized multiwalled carbon nanotubes as the pseudostationary phase in electrokinetic chromatography for the analysis of phytochemical compounds in biological fluids. Electrophoresis 2015; 36:1055-63. [DOI: 10.1002/elps.201400542] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 12/18/2014] [Accepted: 01/07/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Wan Cao
- Department of Pharmaceutical Engineering, College of Material Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou P. R. China
| | - Shuai-Shuai Hu
- Department of Pharmaceutical Engineering, College of Material Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou P. R. China
| | - Xue-zhen Ying
- Department of Pharmaceutical Engineering, College of Material Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou P. R. China
| | - Li-Hong Ye
- Department of Traditional Chinese Medicine, Integrated Chinese and Western Medicine Hospital of Zhejiang Province; Hangzhou P. R. China
| | - Jun Cao
- Department of Pharmaceutical Engineering, College of Material Chemistry and Chemical Engineering; Hangzhou Normal University; Hangzhou P. R. China
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Wu M, Gao F, Zhang Y, Wang G, Wang Q, Li H. Sensitive analysis of antibiotics via hyphenation of field-amplified sample stacking with reversed-field stacking in microchip micellar electrokinetic chromatography. J Pharm Biomed Anal 2015; 103:91-8. [DOI: 10.1016/j.jpba.2014.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 10/30/2014] [Accepted: 11/02/2014] [Indexed: 12/14/2022]
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6
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FUJITA Y, OHYAMA K, KISHIKAWA N, KURODA N. Chondroitin Sulfate Modified Stationary Phase with Mixed Mode of Hydrophilic Interaction and Strong Cation-Exchange for Capillary Electrochromatography. CHROMATOGRAPHY 2015. [DOI: 10.15583/jpchrom.2015.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Yoshiko FUJITA
- Graduate School of Biomedical Sciences, Nagasaki University
| | - Kaname OHYAMA
- Graduate School of Biomedical Sciences, Nagasaki University
| | | | - Naotaka KURODA
- Graduate School of Biomedical Sciences, Nagasaki University
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Hyslop JS, Hall LMG, Umansky AA, Palmer CP. RAFT polymerized nanoparticles: influences of shell and core chemistries on performance for electrokinetic chromatography. Electrophoresis 2014; 35:728-35. [PMID: 24302072 DOI: 10.1002/elps.201300403] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 11/13/2013] [Accepted: 11/17/2013] [Indexed: 11/06/2022]
Abstract
The performance and solvation characteristics of two novel latex nanoparticle (NP) pseudo-stationary phases (PSPs) for EKC are determined and compared to those of previously reported micellar, polymeric, and NP materials. The new NPs have shells composed of strongly acidic poly(AMPS) as opposed to the poly(acrylic acid) shell of the prior NP, and have varied hydrophobic core chemistry of either poly(butyl acrylate) or poly(ethyl acrylate). The NPs poly(AMPS) shell shows only minor changes in mobility and selectivity between pH 4.9 and 9.4, allowing adjustment of pH to influence and optimize separation performance. All of the NP phases have significantly different solvation characteristics and selectivity relative to SDS micelles. The selectivity and solvent character are similar for NPs with poly(butyl acrylate) cores and different shells, but vary significantly between NPs with poly(butyl acrylate) versus poly(ethyl acrylate) cores. NPs with poly(butyl acrylate) cores are among the least cohesive PSPs reported to date, while the NP with poly(ethyl acrylate) core is among the most cohesive. The results demonstrate that PSPs with unique selectivity can be generated by altering the chemistry of the hydrophobic core.
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Affiliation(s)
- Jesse S Hyslop
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
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Hua X, Du Y, Chen J, Xu G, Yu T, Zhang Q. Evaluation of the enantioselectivity of carbon nanoparticles-modified chiral separation systems using dextrin as chiral selector by capillary electrokinetic chromatography. Electrophoresis 2013; 34:1901-7. [DOI: 10.1002/elps.201200627] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/29/2013] [Accepted: 03/29/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaoyi Hua
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing; P. R. China
| | | | - Jiaquan Chen
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing; P. R. China
| | - Guangfu Xu
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing; P. R. China
| | - Tao Yu
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing; P. R. China
| | - Qi Zhang
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing; P. R. China
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Gao J, Latep N, Ge Y, Tian J, Wu J, Qin W. Polyamidoamine-grafted silica nanoparticles as pseudostationary phases for capillary electrochromatographic separation of proteins. J Sep Sci 2013; 36:1575-81. [DOI: 10.1002/jssc.201200837] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 01/12/2013] [Accepted: 02/12/2013] [Indexed: 01/19/2023]
Affiliation(s)
- Jingjie Gao
- College of Chemistry; Beijing Normal University; Beijing; China
| | - Nurgul Latep
- College of Chemistry; Beijing Normal University; Beijing; China
| | - Ying Ge
- College of Chemistry; Beijing Normal University; Beijing; China
| | - Jing Tian
- College of Chemistry; Beijing Normal University; Beijing; China
| | - Jingqing Wu
- College of Chemistry; Beijing Normal University; Beijing; China
| | - Weidong Qin
- College of Chemistry; Beijing Normal University; Beijing; China
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Wiedmer SK, Lokajová J. Capillary electromigration techniques for studying interactions between analytes and lipid dispersions. J Sep Sci 2012; 36:37-51. [DOI: 10.1002/jssc.201200829] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 09/26/2012] [Accepted: 09/26/2012] [Indexed: 11/11/2022]
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11
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In silico study of Alzheimer’s disease in relation to FYN gene. Interdiscip Sci 2012; 4:153-60. [DOI: 10.1007/s12539-012-0123-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 07/06/2011] [Accepted: 09/22/2011] [Indexed: 10/28/2022]
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12
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Polymeric micelle as the pseudostationary phase in electrokinetic chromatography. J Chromatogr A 2012; 1245:190-8. [DOI: 10.1016/j.chroma.2012.05.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 04/28/2012] [Accepted: 05/09/2012] [Indexed: 11/21/2022]
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Abstract
AbstractEnantiomers (stereoisomers) can exhibit substantially different properties if present in chiral environments. Since chirality is a basic property of nature, the different behaviors of the individual enantiomers must be carefully studied and properly treated. Therefore, enantioselective separations are a very important part of separation science. To achieve the separation of enantiomers, an enantioselective environment must be created by the addition of a chiral selector to the separation system. Many chiral selectors have been designed and used in various fields, such as the analyses of drugs, food constituents and agrochemicals. The most popular have become the chiral selectors and/or chiral stationary phases that are of general use, i.e., are applicable in various separation systems and allow for chiral separation of structurally different compounds. This review covers the most important chiral selectors / chiral stationary phases described and applied in high performance liquid chromatography and capillary electrophoresis during the period of the last three years (2008–2011).
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Hsieh YF, Huang BY, Liu CP, Liu CY. NaDDBS as a dispersion agent for multiwalled carbon nanotubes in capillary EKC separation of nucleotides. Electrophoresis 2012; 31:3288-95. [PMID: 22216447 DOI: 10.1002/elps.201000056] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A novel pseudostationary phase (PSP) of multiwalled carbon nanotubes (MWCNTs) dispersed with sodium dodecylbenzenesulfonate (NaDDBS) was used for the EKC separation of nucleotides. NaDDBS has a long hydrophobic chain and a benzylsulfonate group. It suspends more MWCNTs (about 100-fold) than SDS, and the π-π interaction between the benzene ring of NaDDBS and MWCNTs prolongs the slurry suspension time. Using NaDDBS as a surfactant can reduce the required amount of MWCNTs and decrease the baseline noise. To produce a stable suspension, the optimum ratio (w/w) of MWCNTs to NaDDBS was investigated with turbidimetry. In this context, several parameters affecting EKC separation were studied, including buffer pH, composition, concentration, and the organic modifier. Use of NaDDBS (8 mg/L)/MWCNTs (0.8 mg/L) as the PSP in a phosphate buffer (30 mM, pH 8) yielded complete resolution of seven geometric isomers of a nucleoside monophosphate. In stacking mode, with 10% MeOH in the sample plug, the mixture of nucleoside mono-, di-, and tri-phosphates was satisfactorily separated in phosphate buffer (50 mM, pH 9). The results indicate that nucleotides with bases containing more electron-withdrawing groups interact more strongly with MWCNTs. The system has been used to separate oligonucleotides, and to analyze nucleotides in a complex matrix sample.
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Affiliation(s)
- Yu-Fang Hsieh
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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15
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Cao J, Li P, Yi L. Ionic liquids coated multi-walled carbon nanotubes as a novel pseudostationary phase in electrokinetic chromatography. J Chromatogr A 2011; 1218:9428-34. [PMID: 22119676 DOI: 10.1016/j.chroma.2011.11.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 11/05/2011] [Accepted: 11/08/2011] [Indexed: 01/07/2023]
Abstract
A new CE system using ionic liquids coated multi-walled carbon nanotubes (ILs-MWNTs) as pseudostationary phase was developed for the simultaneous determination of four flavonoids, four phenolic acids and two saponins. Several parameters affecting the separation were studied, including the choice of ILs, ILs-MWNTs concentration, the respective use of ILs and MWNTs, buffer pH, SDS concentration and borate content. Results revealed that the addition of ILs-MWNTs in running electrolytes enhanced the separation of target compounds compared to conventional micelle because the surface of carbon nanotubes interacted favorably with the analytes. Under the optimum conditions, a baseline separation was achieved for these analytes within 11 min in a 41.5 cm of effective length fused-silica capillary. At a voltage of 28.0 kV, the separation was carried out in a 10mM borate buffer (pH 9.0) containing 100mM SDS, 6% propanol and 4 μg mL(-1) ILs-MWNTs. All calibration curves showed good linearity (r(2)>0.9990) within the test ranges. The intra- and inter-day precisions as determined from standard solutions were below 3.30% and 6.23%, respectively. The recoveries for ten compounds were found to range from 85.5 to 101.8%. The method was successfully applied for the determination of three types of compounds in Qishenyiqi dropping pills. Our experimental results indicated that the proposed method offered new opportunities for the analysis of complex samples.
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Affiliation(s)
- Jun Cao
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China.
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16
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Qu P, Zhang L, Sheng J, Lei J, Ju H. Convenient enantioseparation by monolithic imprinted capillary clamped in a chip with electrochemical detection. Electrophoresis 2011; 32:1522-9. [DOI: 10.1002/elps.201000655] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 03/07/2011] [Accepted: 03/07/2011] [Indexed: 11/05/2022]
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17
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Sueyoshi K, Hashiba K, Kawai T, Kitagawa F, Otsuka K. Hydrophobic labeling of amino acids: Transient trapping-capillary/microchip electrophoresis. Electrophoresis 2011; 32:1233-40. [DOI: 10.1002/elps.201000567] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 01/04/2011] [Accepted: 01/04/2011] [Indexed: 11/11/2022]
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18
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Palmer CP, Keeffer A, Hilder EF, Haddad PR. Retention behavior and selectivity of a latex nanoparticle pseudostationary phase for electrokinetic chromatography. Electrophoresis 2011; 32:588-94. [DOI: 10.1002/elps.201000470] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/01/2010] [Accepted: 11/07/2010] [Indexed: 11/11/2022]
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El Deeb S, Iriban MA, Gust R. MEKC as a powerful growing analytical technique. Electrophoresis 2010; 32:166-83. [PMID: 21171121 DOI: 10.1002/elps.201000398] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 09/30/2010] [Accepted: 09/30/2010] [Indexed: 11/11/2022]
Abstract
This review summarizes the principle and the developments in MEKC in terms of separation power, sensitivity, and detection approaches more than 25 years after its appearance. Newly used surfactants are mentioned. Classical and new sample concentration techniques in MEKC are described. The different detection approaches in MEKC with advantages, limitations, and future prospects are also discussed. This review highlights the wider application of MEKC in different analytical fields. Various recent selected applications of this technique in different analytical fields are reported.
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Affiliation(s)
- Sami El Deeb
- Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
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Palmer CP, Hilder EF, Quirino JP, Haddad PR. Electrokinetic chromatography and mass spectrometric detection using latex nanoparticles as a pseudostationary phase. Anal Chem 2010; 82:4046-54. [PMID: 20402470 DOI: 10.1021/ac902922u] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The utility of novel latex nanoparticles as pseudostationary phases for electrokinetic chromatography with UV and mass spectrometric detection is demonstrated. The nanoparticles are synthesized using ab initio RAFT (reversible addition-fragmentation chain transfer) in emulsion polymerization, which yields small (63 nm) particles with a narrow size distribution, a hydrophobic core, and an ionic shell. The nanoparticles are shown to provide efficient and selective separations, with retention and separation selectivity dominated by hydrophobic interactions. The nanoparticles are highly retentive, such that they are effective at relatively low concentrations. Addition of the nanoparticles to the background electrolyte at these concentrations has a minor effect on the noise with UV detection, no measurable effect on the separation current, and minor effects on analyte ionization efficiency during electrospray ionization. The nanoparticles do not cause fouling or degradation of the electrospray-mass spectrometer interface even after several weeks of use. The combination of online sample preconcentration via sweeping and selective mass spectrometric detection yields low detection limits (10-16 ppb), particularly for more hydrophobic compounds.
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Affiliation(s)
- Christopher P Palmer
- Department of Chemistry and Biochemistry, University of Montana, Missoula, Montana 59803, USA.
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Wiedmer SK, Lokajová J, Riekkola ML. Marker compounds for the determination of retention factors in EKC. J Sep Sci 2009; 33:394-409. [DOI: 10.1002/jssc.200900625] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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