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Chen CJ, Chang CT, Lin ZR, Chiu WC, Liu JY, Ye ZC, Wang CJ, Shieh YT, Liu MY. Coupling capillary electrophoresis with mass spectrometry for the analysis of oxidized phospholipids in human high-density lipoproteins. Electrophoresis 2024; 45:333-345. [PMID: 37985935 DOI: 10.1002/elps.202300139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 11/22/2023]
Abstract
The oxidized 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (ox-PAPC) products in human high-density lipoproteins (HDLs) were investigated by low-flow capillary electrophoresis-mass spectrometry (low-flow CE-MS). To accelerate the optimization, native PAPC (n-PAPC) standard was first analyzed by a commercial CE instrument with a photodiode array detector. The optimal separation buffer contained 60% (v/v) acetonitrile, 40% (v/v) methanol, 20 mM ammonium acetate, 0.5% (v/v) formic acid, and 0.1% (v/v) water. The selected separation voltage and capillary temperature were 20 kV and 23°C. The optimal CE separation buffer was then used for the low-flow CE-MS analysis. The selected MS conditions contained heated capillary temperature (250°C), capillary voltage (10 V), and injection time (1 s). No sheath gas was used for MS. The linear range for n-PAPC was 2.5-100.0 µg/mL. The coefficient of determination (R2 ) was 0.9918. The concentration limit of detection was 1.52 µg/mL, and the concentration limit of quantitation was 4.60 µg/mL. The optimal low-flow CE-MS method showed good repeatability and sensitivity. The ox-PAPC products in human HDLs were determined based on the in vitro ox-PAPC products of n-PAPC standard. Twenty-one ox-PAPC products have been analyzed in human HDLs. Uremic patients showed significantly higher levels of 15 ox-PAPC products than healthy subjects.
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Affiliation(s)
- Chao-Jung Chen
- Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan
- Department of Medical Research, Proteomics Core Laboratory, China Medical University Hospital, Taichung, Taiwan
| | - Chiz-Tzung Chang
- Department of Medicine, China Medical University Hospital, Taichung, Taiwan
- College of Medicine, China Medical University, Taichung, Taiwan
| | - Zhi-Ru Lin
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Wen-Chien Chiu
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Jia-Yuan Liu
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Zhi-Cheng Ye
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Chuan-Jun Wang
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Ying-Tzu Shieh
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Mine-Yine Liu
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
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Chang CT, Chiu WC, Lin ZR, Shieh YT, Chang IT, Hsia MH, Wang CJ, Chen CJ, Liu MY. Determination of oxidized 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine products in human very low-density lipoproteins by nonaqueous low-flow capillary electrophoresis-mass spectrometry. J Chromatogr A 2023; 1687:463694. [PMID: 36502642 DOI: 10.1016/j.chroma.2022.463694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/29/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022]
Abstract
A simple and fast low-flow capillary electrophoresis-mass spectrometry (low-flow CE-MS) method has been developed to analyze oxidized 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (ox-PAPC) products in human very low-density lipoproteins (VLDLs). Native PAPC standard was analyzed to optimize the low-flow CE-MS method. The optimal CE conditions included separation buffer (60% (v/v) acetonitrile, 40% (v/v) methanol, 0.1% (v/v) water, 0.5% (v/v) formic acid, 20 mM ammonium acetate), sheath liquid (60% (v/v) acetonitrile, 40% (v/v) methanol, 0.1% (v/v) water, 20 mM ammonium acetate), separation voltage (20 kV), separation capillary internal diameter (i.d.) (75 µm), separation capillary temperature (23˚C) and sample injection time (6 s). The selected MS conditions included heated capillary temperature (250°C), capillary voltage (10 V), and injection time (1 s). Sheath gas was not used in this study. The total ion chromatograms (TICs), extracted ion chromatograms (EICs) and MS spectra of native PAPC standard and its in vitro oxidation products showed good repeatability and sensitivity. To determine the ox-PAPC products in human VLDLs, the EICs and MS spectra of VLDLs were compared with the in vitro oxidation products of native PAPC standard. For native PAPC standard, the measured linear range was 2.5 - 100.0 µg/mL, and the coefficients of determination (R2) was 0.9994. The concentration limit of detection (LOD) was 0.44 µg/mL, and the concentration limit of quantitation (LOQ) was 1.34 µg/mL. A total of 21 ox-PAPC products were analyzed for the VLDLs of healthy and uremic subjects. The levels of 7 short-chain and 5 long-chain ox-PAPC products on uremic VLDLs were significantly higher than healthy VLDLs. This simple low-flow CE-MS method might be a good alternative for LC-MS for the analysis of ox-PAPC products. Furthermore, it might also help scientists to expedite the search for uremic biomarkers.
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Affiliation(s)
- Chiz-Tzung Chang
- Department of Medicine, China Medical University Hospital, Taichung, Taiwan; College of Medicine, China Medical University, Taichung, Taiwan
| | - Wen-Chien Chiu
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Zhi-Ru Lin
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Ying-Tzu Shieh
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - I-Ting Chang
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Min-Hui Hsia
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Chuan-Jun Wang
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
| | - Chao-Jung Chen
- Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan; Proteomics Core Laboratory, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.
| | - Mine-Yine Liu
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan.
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de Magalhães Benedetti NIG, Costa Veloso DFM, Nascimento TL, Almeida Diniz DG, Maione-Silva L, Lima EM. A Reliable HPLC-ELSD Method for Determination of Cholesterol, Phosphatidylcholine, Lysophosphatidylcholine Content and the Stability of a Liposomal Formulation. CURR PHARM ANAL 2020. [DOI: 10.2174/1573412915666190618092211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:Liposomes continue to play an important role in drug delivery research due to their ability to improve transport and targeting of a wide range of active molecules. Analysis of liposomal components is a key point in the characterization and evaluation of formulation stability. The aim of this work was to develop and validate an HPLC-ELSD method for the characterization and quality control of liposomes.Methods:HPLC-ELSD method was validated by assessing selectivity, linearity, precision, accuracy, limit of detection and quantitation. The mobile phase consisted of a 0.1% (v/v) of trifluoroacetic acid (TFA) and methanol in gradient elution. Initial rate was 20:80 (0.1% TFA: methanol), with a ramp reaching 100% methanol. HPLC-MS/MS was used to confirm the presence of the fatty acid mixture in the analyzed lipids, as well as sub-products generated under pre-determined conditions in the stability study.Results:A HPLC-ELSD method has been developed to detect and measure cholesterol, phosphatidylcholine and lysophosphatidylcholine. High specificity, sensitivity and linearity within the predetermined range for all the compounds analyzed (R2>0.99) were obtained. Accuracy and precision results for all the compounds were within the acceptance limit of ≤5% and 90-110%, respectively. Mass spectrometry results showed complementary information about the phospholipid composition to evaluate the degree of degradation of liposomes over different storage conditions.Conclusion:The method was successfully applied as a quality control tool for the analysis of a wide range of lipids, present in liposomal formulations. HPLC-MS/MS was used to ensure complete elucidation of the lipid components and the detected lyso-forms.
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Affiliation(s)
- Naiara Ieza Gallo de Magalhães Benedetti
- Laboratorio de Nanotecnologia Farmaceutica e Sistemas de Liberacao de Farmacos, Faculdade de Farmacia, Universidade Federal de Goias - UFG, Goiania, Goias, Brazil
| | - Danillo Fabrini Maciel Costa Veloso
- Laboratorio de Nanotecnologia Farmaceutica e Sistemas de Liberacao de Farmacos, Faculdade de Farmacia, Universidade Federal de Goias - UFG, Goiania, Goias, Brazil
| | - Thais Leite Nascimento
- Laboratorio de Nanotecnologia Farmaceutica e Sistemas de Liberacao de Farmacos, Faculdade de Farmacia, Universidade Federal de Goias - UFG, Goiania, Goias, Brazil
| | - Danielle Guimarães Almeida Diniz
- Laboratorio de Nanotecnologia Farmaceutica e Sistemas de Liberacao de Farmacos, Faculdade de Farmacia, Universidade Federal de Goias - UFG, Goiania, Goias, Brazil
| | - Lorena Maione-Silva
- Laboratorio de Nanotecnologia Farmaceutica e Sistemas de Liberacao de Farmacos, Faculdade de Farmacia, Universidade Federal de Goias - UFG, Goiania, Goias, Brazil
| | - Eliana Martins Lima
- Laboratorio de Nanotecnologia Farmaceutica e Sistemas de Liberacao de Farmacos, Faculdade de Farmacia, Universidade Federal de Goias - UFG, Goiania, Goias, Brazil
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Zhang W, He M, Yuan T, Xu W. A two-step method for rapid characterization of electroosmotic flows in capillary electrophoresis. Electrophoresis 2017; 38:3130-3135. [DOI: 10.1002/elps.201700215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/25/2017] [Accepted: 08/25/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Wenjing Zhang
- School of Life Science; Beijing Institute of Technology; Beijing P. R. China
| | - Muyi He
- School of Life Science; Beijing Institute of Technology; Beijing P. R. China
| | - Tao Yuan
- College of Information Science; Shenzhen University; Shenzhen P. R. China
| | - Wei Xu
- School of Life Science; Beijing Institute of Technology; Beijing P. R. China
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Montealegre C, Verardo V, Luisa Marina M, Caboni MF. Analysis of glycerophospho- and sphingolipids by CE. Electrophoresis 2014; 35:779-92. [DOI: 10.1002/elps.201300534] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 11/19/2013] [Accepted: 11/19/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Cristina Montealegre
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Alcalá de Henares Madrid Spain
| | - Vito Verardo
- Inter-Departmental Centre for Agri-Food Industrial Research (CIRI Agroalimentare); University of Bologna; Piazza Goidanich Cesena (FC) Italy
| | - María Luisa Marina
- Department of Analytical Chemistry; Faculty of Chemistry; University of Alcalá; Alcalá de Henares Madrid Spain
| | - Maria Fiorenza Caboni
- Inter-Departmental Centre for Agri-Food Industrial Research (CIRI Agroalimentare); University of Bologna; Piazza Goidanich Cesena (FC) Italy
- Department of Agricultural and Food Sciences; Alma Mater Studiorum-Università di Bologna; Piazza Goidanich Cesena (FC) Italy
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6
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Shimura K, Kasai KI. Affinity probe capillary electrophoresis of insulin using a fluorescence-labeled recombinant Fab as an affinity probe. Electrophoresis 2013; 35:840-5. [DOI: 10.1002/elps.201300464] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 10/21/2013] [Accepted: 11/26/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Kiyohito Shimura
- Laboratory of Chemistry; School of Medicine, Fukushima Medical University; Fukushima Fukushima Japan
| | - Ken-Ichi Kasai
- Department of Biological Chemistry; Faculty of Pharmaceutical Sciences, Teikyo University; Sagamihara Kanagawa Japan
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7
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Montealegre C, Sánchez-Hernández L, Crego AL, Marina ML. Determination and characterization of glycerophospholipids in olive fruit and oil by nonaqueous capillary electrophoresis with electrospray-mass spectrometric detection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:1823-1832. [PMID: 23379923 DOI: 10.1021/jf304357e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A nonaqueous capillary electrophoresis method with electrospray-mass spectrometric detection was developed to study the glycerophospholipid fraction in olive fruit and olive oil samples. In olive fruits, where the information available about the phospholipid fraction was very scarce, results obtained in this work allowed us to complete and improve this knowledge. The glycerophospholipid fraction of the olive fruit samples analyzed was composed of phosphatidylcholine (PC), phosphatidylethanolamine (PE), lysophosphatidylethanolamine (lyso-PE), phosphatidylinositol (PI), phosphatidic acid (PA), lysophosphatidic acid (lyso-PA), and phosphatidylglycerol (PG). Differences in the relative abundance of the glycerophospholipid classes determined were observed as a function of the botanical and geographical origin of the olive fruits analyzed. Interestingly, the olive stone and pulp analyzed also showed different glycerophospholipid compositions. For olive oil, five glycerophospholipids (lyso-PA, PC, PE, lyso-PE, and PG) were detected. Finally, identification of the main molecular species in the different glycerophospholipid classes for the olive fruit samples analyzed was accomplished by tandem mass spectrometric experiments and information from the literature.
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Affiliation(s)
- C Montealegre
- Department of Analytical Chemistry, University of Alcalá, Alcalá de Henares, Madrid, Spain
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8
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Song W, Ao MZ, Shi Y, Yuan LF, Yuan XX, Yu LJ. Interaction between phillygenin and human serum albumin based on spectroscopic and molecular docking. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 85:120-126. [PMID: 22000638 DOI: 10.1016/j.saa.2011.09.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 09/18/2011] [Accepted: 09/21/2011] [Indexed: 05/31/2023]
Abstract
In this paper, the interaction of human serum albumin (HSA) with phillygenin was investigated by fluorescence, circular dichroism (CD), UV-vis spectroscopic and molecular docking methods under physiological conditions. The Stern-Volmer analysis indicated that the fluorescence quenching of HSA by phillygenin resulted from static mechanism, and the binding constants were 1.71×10(5), 1.61×10(5) and 1.47×10(4) at 300, 305 and 310K, respectively. The results of UV-vis spectra show that the secondary structure of the protein has been changed in the presence of phillygenin. The CD spectra showed that HSA conformation was altered by phillygenin with a major reduction of α-helix and an increase in β-sheet and random coil structures, indicating a partial protein unfolding. The distance between donor (HSA) and acceptor (phillygenin) was calculated to be 3.52nm and the results of synchronous fluorescence spectra showed that binding of phillygenin to HSA can induce conformational changes in HSA. Molecular docking experiments found that phillygenin binds with HSA at IIIA domain of hydrophobic pocket with hydrogen bond interactions. The ionic bonds were formed with the O (4), O (5) and O (6) of phillygenin with nitrogen of ASN109, ARG186 and LEU115, respectively. The hydrogen bonds are formed between O (2) of phillygenin and SER419. In the presence of copper (II), iron (III) and alcohol, the apparent association constant K(A) and the number of binding sites of phillygenin on HSA were both decreased in the range of 88.84-91.97% and 16.09-18.85%, respectively. In view of the evidence presented, it is expected to enrich our knowledge of the interaction dynamics of phillygenin to the important plasma protein HSA, and it is also expected to provide important information of designs of new inspired drugs.
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Affiliation(s)
- W Song
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
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9
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Yang YL, Chong CP, Tsai MH, Liu MY. Analysis of in vitro oxidized human LDL phospholipids by solid-phase extraction and micellar electrokinetic capillary chromatography. Biomed Chromatogr 2011; 26:441-8. [PMID: 22392513 DOI: 10.1002/bmc.1684] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2011] [Accepted: 06/21/2011] [Indexed: 11/11/2022]
Abstract
Phospholipids of in vitro oxidized human low-density lipoproteins (LDL) were separated by two different solid-phase extraction (SPE) methods. One of the two methods was designed to test the effects of gradient elution. This SPE method isolated more phospholipids from in vitro oxidized LDL than the other one according to the results of liquid chromatography and electrospray ionization mass spectrometry (LC ESI-MS) analysis. A micellar electrokinetic capillary chromatography (MEKC) method was also used to analyze phospholipids separated by SPE. The results of MEKC and LC ESI-MS were consistent for the major phospholipid classes, including PC, lysoPC, PE, PI and PS. The MEKC profiles showed significant differences for native and oxidized LDL phospholipids. Therefore, the unique combination of SPE and MEKC methods showed dramatic distinctions between native and in vitro oxidized human LDL phospholipids. The combination also shows great potential for rapid analysis of in vivo oxidized human LDL phospholipids in the future.
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Affiliation(s)
- Ying-Ling Yang
- Department of Chemistry, National Changhua University of Education, Changhua, Taiwan
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Qiao X, Sun L, Wang L, Liang Y, Zhang L, Shan Y, Peng X, Liang Z, Zhang Y. High sensitive protein detection by hollow fiber membrane interface based protein enrichment and in situ fluorescence derivatization. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:1439-43. [DOI: 10.1016/j.jchromb.2010.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 10/12/2010] [Accepted: 11/01/2010] [Indexed: 11/29/2022]
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11
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Chong CP, Lin TY, Chang CL, Yang YL, Tsai MH, Yu YS, Liu MY. Micellar electrokinetic chromatography profiles of human high-density lipoprotein phospholipids. Electrophoresis 2011; 32:1241-51. [DOI: 10.1002/elps.201000474] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 01/17/2011] [Accepted: 01/17/2011] [Indexed: 01/20/2023]
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12
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Investigation of interaction of human platelet membrane components with anticoagulant drugs Abciximab and Eptifibatide. Folia Histochem Cytobiol 2011; 48:687-92. [PMID: 21478117 DOI: 10.2478/v10042-010-0090-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abciximab (Abci) and eptifibatide (Epti) are antiaggregate drugs which may reduce thrombotic complications in acute coronary syndromes. The aim of this work was the investigation of the interaction between the phospholipid-GPIIb/IIIa glycoprotein complex and Abci or Epti, and the influence of these drugs on the phospholipid ratio in the platelet membrane. The interaction between the phospholipid-GPIIb/IIIa glycoprotein complex and antiaggregate drugs were investigated using the Surface Plasmon Resonance Imaging technique (SPRI). Phospholipids phosphatidylinositol (PI), phosphatidylserine (PS), phosphatidylethanolamine (PE), phosphatidylcholine (PC) and sphingomyelin (SM) were first immobilized onto the gold chip surface. The phospholipid ratio in the platelet membrane was determined by the HPLC. Only PI, PS, PE and PC were determined. Human platelets treated 'in vitro' with Abci or Epti exhibit changes in the phospholipid ratio in the platelet membrane. The ratio of PS decreases and PC rises. The SPRI distinctly shows interactions between phospholipids and glycoprotein GPIIb/IIIa, and between the phospholipid-glycoprotein GPIIb/IIIa complex and Abci or Epti. The interaction between phospholipids and glycoprotein GPIIb/IIIa is growing in the sequence: PI<<SM<PE<PC<PS. The interaction between phospholipid-glycoprotein GPIIb/IIIa complex and Abci/Epti is growing in the sequence: PS<PI<PC<PE<SM. SPRI was proved to be excellent tool for observation of such interactions.
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13
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Szökő É, Tábi T. Analysis of biological samples by capillary electrophoresis with laser induced fluorescence detection. J Pharm Biomed Anal 2010; 53:1180-92. [DOI: 10.1016/j.jpba.2010.07.045] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 07/23/2010] [Accepted: 07/27/2010] [Indexed: 12/26/2022]
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14
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Chen L, Wu M, Lin X, Xie Z. Study on the interaction between human serum albumin and a novel bioactive acridine derivative using optical spectroscopy. LUMINESCENCE 2010; 26:172-7. [DOI: 10.1002/bio.1201] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Revised: 11/11/2009] [Accepted: 01/14/2010] [Indexed: 11/06/2022]
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15
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More VR, Mote US, Patil SR, Kolekar GB. Spectroscopic studies on the interaction between norfloxacin and p-amino benzoic acid: analytical application on determination of norfloxacin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:771-775. [PMID: 19733503 DOI: 10.1016/j.saa.2009.08.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Revised: 07/16/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
Fluorescence (Förster) Resonance Energy Transfer (FRET) between norfloxacin (NF) and p-amino benzoic acid (PABA) has been investigated by fluorescence and UV-vis absorption spectroscopy. It was found that the quenching of fluorescence of PABA is followed by simultaneous sensitization of NF fluorescence. The hydrophobic and electrostatic interaction plays an important role to stabilize the complex. The binding constant (K), binding site number (n) and corresponding thermodynamic parameters like free energy change (DeltaG), enthalpy change (DeltaH) and entropy change (DeltaS) were determined according to van't Hoff equation. Using FRET, the distance (r) between donor (PABA) and acceptor (NF) was obtained. This method is simple, selective and relatively free of interference from co-existing substances. The method was successfully applied to the determination of norfloxacin from pharmaceutical tablets.
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Affiliation(s)
- V R More
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, MS, India
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17
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Interaction of Fluorescein with Felodipine: A Spectrofluorometric and Thermodynamic Study. J SOLUTION CHEM 2009. [DOI: 10.1007/s10953-009-9397-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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YAMAGUCHI Y, HASHINO K, ITO M, IKAWA K, NISHIOKA T, MATSUMOTO K. Sodium Dodecyl Sulfate Polyacrylamide Slab Gel Electrophoresis and Hydroxyethyl Cellurose Gel Capillary Electrophoresis of Luminescent Lanthanide Chelate-labeled Proteins with Time-Resolved Detection. ANAL SCI 2009; 25:327-32. [DOI: 10.2116/analsci.25.327] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yoshinori YAMAGUCHI
- Consolidated Research Institute for Advanced Science and Medical Care (ASMeW), Waseda University
| | - Kimikazu HASHINO
- Advanced Research Institute for Science and Engineering, Waseda University
- CREST, Japan Science and Technology Agency
| | - Masahiro ITO
- Department of Chemistry, School of Science and Engineering, Waseda University
| | - Keisuke IKAWA
- Department of Chemistry, School of Science and Engineering, Waseda University
| | - Takuya NISHIOKA
- Advanced Research Institute for Science and Engineering, Waseda University
- Department of Chemistry, School of Science and Engineering, Waseda University
| | - Kazuko MATSUMOTO
- CREST, Japan Science and Technology Agency
- Department of Chemistry, School of Science and Engineering, Waseda University
- Tokyo Chemical Industry Co., Ltd
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Yue Y, Chen X, Qin J, Yao X. Spectroscopic investigation on the binding of antineoplastic drug oxaliplatin to human serum albumin and molecular modeling. Colloids Surf B Biointerfaces 2008; 69:51-7. [PMID: 19084386 DOI: 10.1016/j.colsurfb.2008.10.016] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Revised: 10/23/2008] [Accepted: 10/28/2008] [Indexed: 11/24/2022]
Abstract
This study was designed to examine the interaction of oxaliplatin with human serum albumin (HSA) under physiological conditions by using fluorescence, absorption, FT-IR and circular dichroism (CD) spectroscopic techniques in combination with molecular docking study. Spectroscopic analysis of the emission quenching at different temperatures has revealed that the quenching mechanism of oxaliplatin with HSA was static quenching mechanism. The value of 1.64nm for the distance r between the donor (HSA) and acceptor (oxaliplatin) was derived from the fluorescence resonance energy transfer. From the CD and FT-IR results, it was apparent that the interaction of oxaliplatin with HSA caused a conformational change of the protein. Molecular docking study showed that oxaliplatin bind to residues located in subdomain IIA of HSA. The effect of metal ions and amino acids on the binding constant of HSA-oxaliplatin complex was also discussed.
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Affiliation(s)
- Yuanyuan Yue
- Department of Chemistry, Lanzhou University, Lanzhou 730000, PR China
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21
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Ho YL, Chiu JH, Wu CY, Liu MY. Separation and determination of in vitro oxidized phospholipids by capillary zone electrophoresis. Anal Biochem 2007; 367:210-8. [PMID: 17553450 DOI: 10.1016/j.ab.2007.04.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2007] [Revised: 04/10/2007] [Accepted: 04/17/2007] [Indexed: 11/25/2022]
Abstract
A simple capillary zone electrophoresis (CZE) method was used to determine in vitro oxidized phosphatidyl choline (ox-PC). To optimize the capillary electrophoresis (CE) conditions, organic buffer additives, buffer ionic strength, buffer pH, and applied voltage were examined. The optimal CE separation buffer chosen was an aqueous-organic solvent system containing 10% sodium phosphate buffer (5 mM, pH 7.40), 80% methanol, and 10% acetonitrile. One major peak with a small shoulder was found for phosphatidyl choline (PC), whereas one major peak and a complex region containing several lower-mobility peaks were found for ox-PC. The lower-mobility species of ox-PC has high levels of conjugated dienes characterized by strong absorbance at 234 nm. The electropherograms of PC and ox-PC were significantly different and highly reproducible. The intensities of lower-mobility species decreased significantly when the antioxidant vitamin C concentration was increased from 6 to 600 microM. This study provides a simple CZE method to differentiate in vitro oxidized from nonoxidized PC molecular species.
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Affiliation(s)
- Yu-Ling Ho
- Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan
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Kandagal P, Shaikh S, Manjunatha D, Seetharamappa J, Nagaralli B. Spectroscopic studies on the binding of bioactive phenothiazine compounds to human serum albumin. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2007.01.021] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Abstract
CE- and microchip-based separations coupled with LIF are powerful tools for the separation, detection and determination of biomolecules. CE with certain configurations has the potential to detect a small number of molecules or even a single molecule, thanks to the high spatial coherence of the laser source which permits the excitation of very small sample volumes with high efficiency. This review article discusses the use of LIF detection for the analysis of peptides and proteins in CE. The most common laser sources, basic instrumentation, derivatization modes and set-ups are briefly presented and special attention is paid to the different fluorogenic agents used for pre-, on- and postcapillary derivatization of the functional groups of these compounds. A table summarizing major applications of these derivatization reactions to the analysis of peptides and proteins in CE-LIF and a bibliography with 184 references are provided which covers papers published to the end of 2005.
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Cheng FQ, Wang YP, Li ZP, Dong C. Fluorescence study on the interaction of human serum albumin with bromsulphalein. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 65:1144-7. [PMID: 16765080 DOI: 10.1016/j.saa.2006.01.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2005] [Accepted: 01/20/2006] [Indexed: 05/10/2023]
Abstract
The binding of bromsulphalein (BSP) with human serum albumin was investigated at different temperatures, 298 and 308 K, by the fluorescence spectroscopy at pH 7.24. The binding constant was determined by Stern-Volmer equation based on the quenching of the fluorescence HSA in the presence of bromsulphalein. The effect of various metal ions on the binding constants of BSP with HSA was investigated. The thermodynamic parameters were calculated according to the dependence of enthalpy change on the temperature as follows: DeltaH and DeltaS possess small negative (9.3 kJ mol(-1)) and positive values (22.3 J K(-l)mol(-l)), respectively. The experimental results revealed that BSP has a strong ability to quench the intrinsic fluorescence of HSA through a static quenching procedure. The binding constants between BSP to HSA were remarkable and independent on temperature. The binding constants between HSA and BSP decreased in the presence of various ions, commonly decreased by 30-55%. The hydrophobic force played a major role in the interaction of BSP with HSA. All these experimental results and theoretical data clarified that BSP could bind to HSA and be effectively transported and eliminated in body, which could be a useful guideline for further drug design.
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Affiliation(s)
- Fang-Qin Cheng
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, P.R. China
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25
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Ostergaard J, Heegaard NHH. Bioanalytical interaction studies executed by preincubation affinity capillary electrophoresis. Electrophoresis 2006; 27:2590-608. [PMID: 16732622 DOI: 10.1002/elps.200600047] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The versatility of CE is beneficial for the study of many types of molecular interactions, because different experimental designs can be made to suit the characteristics of a particular interaction. A very versatile starting point is the preequilibration type of affinity CE that has been used extensively for characterizing biomolecular interactions in the last 15 years. We review this field here and include a comprehensive overview of the existing preincubation ACE modes including their advantages and limitations as well as the methodological developments and applications within the bioanalytical field.
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Affiliation(s)
- Jesper Ostergaard
- Department of Pharmaceutics and Analytical Chemistry, The Danish University of Pharmaceutical Sciences, Copenhagen, Denmark.
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26
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Bo T, Pawliszyn J. Protein thermal stability and phospholipid–protein interaction investigated by capillary isoelectric focusing with whole column imaging detection. J Sep Sci 2006; 29:1018-25. [PMID: 16833235 DOI: 10.1002/jssc.200500456] [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: 11/07/2022]
Abstract
CIEF with whole column imaging detection (WCID) is an attractive technique for studying protein reaction and protein-ligand interaction due to its fast separation, simple operation, and high efficiency. In this study, two interesting applications by the CIEF-WCID were developed, involving the study of protein thermal stability and phospholipid-protein interaction. Four proteins (beta-lactoglobulin B, trypsin inhibitor, phosphorylase b, and trypsinogen) with different pI, and two types of phospholipids, including phosphatidylcholine (PC) and phosphatidylserine (PS), were used for this purpose. First, the altered CIEF profiles of four proteins were exhibited due to conformational changes resulting from protein denaturation induced by a high incubation temperature at 60 degrees C. It was demonstrated that the addition of a zwitterionic phospholipid (PC) played a crucial role in the thermal stability of targeted proteins, especially for trypsin inhibitor whose thermal stability was promoted with the addition of the PC vesicles at 60 degrees C. Second, the zwitterionic (PC) and acidic (PS) phospholipids displayed completely different interactions with the proteins. The addition of PS vesicles modified the zwitterionic phospholipids to carry negative charges, which correspondingly changed the interaction between the phospholipid and the protein. Our study demonstrates that the CIEF-WCID is a powerful approach to study protein reaction and protein-ligand interaction with high efficiency, high selectivity, and fast separation.
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Affiliation(s)
- Tao Bo
- Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada
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27
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Bo T, Pawliszyn J. Role of calcium binding in protein structural changes and phospholipid–protein interactions studied by capillary isoelectric focusing with whole column imaging detection. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2005.11.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Owen RL, Strasters JK, Breyer ED. Lipid vesicles in capillary electrophoretic techniques: characterization of structural properties and associated membrane-molecule interactions. Electrophoresis 2005; 26:735-751. [PMID: 15714573 DOI: 10.1002/elps.200410288] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper reviews the use of lipid vesicles as model membranes in capillary electrophoresis (CE). The history and utility of CE in the characterization of microparticles is summarized, focusing on the application of colloidal electromigration theories to lipid vesicles. For instance, CE experiments have been used to characterize the size, surface properties, enclosed volumes, and electrophoretic mobilities of lipid vesicles and of lipoprotein particles. Several techniques involving small molecules or macromolecules separated in the presence of lipid vesicles are discussed. Interactions between the analytes and the lipid vesicles - acting as a pseudostationary phase or coated stationary phase in electrokinetic chromatography (EKC) - can be used to obtain additional information on the characteristics of the vesicles and analytes, and to study the biophysical properties of membrane-molecule interactions in lipid vesicles and lipoproteins. Different methods of determining binding constants by EKC are reviewed, along with the relevant binding constant calculations and a discussion of the application and limitations of these techniques as they apply to lipid vesicle systems.
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Affiliation(s)
- Rebecca L Owen
- Georgia State University, Department of Chemistry, Atlanta, GA 30302-4098, USA
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29
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Fluorescence detection in capillary electrophoresis. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0166-526x(05)45006-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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30
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Zhang JF, Ma L, Liu X, Lu YT. Using capillary electrophoresis with laser-induced fluorescence to study the interaction of green fluorescent protein-labeled calmodulin with Ca2+- and calmodulin-binding protein. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 804:413-20. [PMID: 15081937 DOI: 10.1016/j.jchromb.2004.01.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2003] [Revised: 01/16/2004] [Accepted: 01/28/2004] [Indexed: 11/26/2022]
Abstract
A separation using capillary electrophoresis with laser-induced fluorescence (CE-LIF) was applied to the study of green fluorescent protein tagged calmoldulin (GFP-CaM) that was expressed from Escherichia coli and purified with Ni(2+)-nitrilotriacetate (Ni-NTA) resin column. It was found that GFP-CaM not only has good fluorescence properties under various conditions similar to GFP, but also retains its calcium-binding ability as the native CaM. GFP-CaM was separated and detected by CE-LIF within 10 min with a limit-of-detection (LOD) of 2 x 10(-10) M for an injection volume of 3 nl, higher than that of common chemical fluorescent-tagged protein method. The results indicated that, as a fluorescence probe, GFP could overcome the drawback of inefficient derivatization of chemical fluorescence probes. The interaction between the GFP-CaM and Ca(2+) was studied in detail using affinity capillary electrophoresis with laser-induced fluorescence and the dissociation constant (K(d)) between GFP-CaM and Ca(2+) was determined to be 1.2 x 10(-5), which is in good agreement with the literature values of untagged CaM (10(-6) to 10(-5)M) obtained by conventional method. As a preliminary application, the interaction between GFP-CaM and OsCBK was also investigated. The method makes it possible to screen the trace amounts of target proteins in crude extracts interacting with CaM under physiological conditions.
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Affiliation(s)
- Jian-Feng Zhang
- Key Laboratory of MOE for Plant Developmental Biology, College of Life Sciences, Wuhan University, Wuhan 430072, PR China
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31
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Gao H, Lei L, Liu J, Kong Q, Chen X, Hu Z. The study on the interaction between human serum albumin and a new reagent with antitumour activity by spectrophotometric methods. J Photochem Photobiol A Chem 2004. [DOI: 10.1016/j.jphotochem.2004.05.017] [Citation(s) in RCA: 244] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Ye M, Hu S, Quigley WWC, Dovichi NJ. Post-column fluorescence derivatization of proteins and peptides in capillary electrophoresis with a sheath flow reactor and 488 nm argon ion laser excitation. J Chromatogr A 2004; 1022:201-6. [PMID: 14753787 DOI: 10.1016/j.chroma.2003.09.037] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We report the use of a sheath flow reactor for post-column fluorescence derivatization of proteins. The derivatization reaction employed naphthalene-2,3-dicarboxaldehyde (NDA) and beta-mercaptoethanol, which were added in the sheath buffer. The labeled proteins were detected by laser-induced fluorescence with an argon-ion laser beam at 488 nm. The performance of this detection scheme was evaluated by separation of some protein standards. A column efficiency of 450,000 plates/m was obtained without stacking. The limits of detection for those standard proteins were determined to be from 8 to 32 nM. Excellent linear relationship was obtained with correlation coefficient of 0.9998 for alpha-lactalbumin concentration ranging from 3.91 x 10(-7) to 1.25 x 10(-5) M. Separation of protein standards at low pH was also demonstrated by reversing the electroosmotic flow (EOF) with addition of cetyltrimethylammonium bromide (CTAB) to the running buffer. Different separation selectivity was achieved, but the sensitivity is poorer than that at high pH. This post-column derivatization detection system was applied successfully to analyze the protein extract from HT29 human colon cancer cells as well as tryptic peptides.
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Affiliation(s)
- Mingliang Ye
- Department of Chemistry, University of Washington, Seattle, WA 98915-1700, USA
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Presley AD, Fuller KM, Arriaga EA. MitoTracker Green labeling of mitochondrial proteins and their subsequent analysis by capillary electrophoresis with laser-induced fluorescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 793:141-50. [PMID: 12880861 DOI: 10.1016/s1570-0232(03)00371-4] [Citation(s) in RCA: 125] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
MitoTracker Green (MTG) is a mitochondrial-selective fluorescent label commonly used in confocal microscopy and flow cytometry. It is expected that this dye selectively accumulates in the mitochondrial matrix where it covalently binds to mitochondrial proteins by reacting with free thiol groups of cysteine residues. Here we demonstrate that MTG can be used as a protein labeling reagent that is compatible with a subsequent analysis by capillary electrophoresis with laser-induced fluorescence detection (CE-LIF). Although the MTG-labeled proteins and MTG do not seem to electrophoretically separate, an enhancement in fluorescence intensity of the product indicates that only proteins with free thiol groups are capable of reacting with MTG. In addition we propose that MTG is a partially selective label towards some mitochondrial proteins. This selectivity stems from the high MTG concentration in the mitochondrial matrix that favors alkylation of the available thiol groups in this subcellular compartment. To that effect we treated mitochondria-enriched fractions that had been prepared by differential centrifugation of an NS-1 cell lysate. This fraction was solubilized with an SDS-containing buffer and analyzed by CE-LIF. The presence of a band with fluorescence stronger than MTG alone also indicated the presence of an MTG-protein product. Confirming that MTG is labeling mitochondrial proteins was done by treating the solubilized mitochondrial fraction with 5-furoylquinoline-3-carboxaldehyde (FQ), a fluorogenic reagent that reacts with primary amino groups, and analysis by CE-LIF using two separate detection channels: 520 nm for MTG-labeled species and 635 nm for FQ-labeled species. In addition, these results indicate that MTG labels only a subset of proteins in the mitochondria-enriched fraction.
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Affiliation(s)
- Andrew D Presley
- Department of Chemistry, University of Minnesota, 207 Pleasant St SE, Minneapolis, MN 55455, USA
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