1
|
Ibrahim T, Battu S, Cook-Moreau J, Cardot P. Instrumentation of hollow fiber flow field flow fractionation for selective cell elution. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 901:59-66. [DOI: 10.1016/j.jchromb.2012.05.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 05/02/2012] [Accepted: 05/04/2012] [Indexed: 12/24/2022]
|
2
|
Azab B, Torbey E, Hatoum H, Singh J, Khoueiry G, Bachir R, McGinn, Jr. JT, McCord D, Lafferty J. Usefulness of Red Cell Distribution Width in Predicting All-Cause Long-Term Mortality after Non-ST-Elevation Myocardial Infarction. Cardiology 2011; 119:72-80. [DOI: 10.1159/000329920] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Accepted: 06/09/2011] [Indexed: 12/22/2022]
|
3
|
Bégaud-Grimaud G, Battu S, Liagre B, Beneytout J, Jauberteau M, Cardot P. Development of a downscale sedimentation field flow fractionation device for biological event monitoring. J Chromatogr A 2009; 1216:9125-33. [DOI: 10.1016/j.chroma.2009.08.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Revised: 07/18/2009] [Accepted: 08/10/2009] [Indexed: 10/20/2022]
|
4
|
Mahler HC, Friess W, Grauschopf U, Kiese S. Protein aggregation: pathways, induction factors and analysis. J Pharm Sci 2009; 98:2909-34. [PMID: 18823031 DOI: 10.1002/jps.21566] [Citation(s) in RCA: 622] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Control and analysis of protein aggregation is an increasing challenge to pharmaceutical research and development. Due to the nature of protein interactions, protein aggregation may occur at various points throughout the lifetime of a protein and may be of different quantity and quality such as size, shape, morphology. It is therefore important to understand the interactions, causes and analyses of such aggregates in order to control protein aggregation to enable successful products. This review gives a short outline of currently discussed pathways and induction methods for protein aggregation and describes currently employed set of analytical techniques and emerging technologies for aggregate detection, characterization and quantification. A major challenge for the analysis of protein aggregates is that no single analytical method exists to cover the entire size range or type of aggregates which may appear. Each analytical method not only shows its specific advantages but also has its limitations. The limits of detection and the possibility of creating artifacts through sample preparation by inducing or destroying aggregates need to be considered with each method used. Therefore, it may also be advisable to carefully compare analytical results of orthogonal methods for similar size ranges to evaluate method performance.
Collapse
Affiliation(s)
- Hanns-Christian Mahler
- Formulation R&D Biologics, Pharmaceutical and Analytical R&D, F. Hoffmann-La Roche Ltd., Basel, Switzerland.
| | | | | | | |
Collapse
|
5
|
Human lymphocyte sorting by gravitational field-flow fractionation. Anal Bioanal Chem 2008; 392:137-45. [DOI: 10.1007/s00216-008-2271-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Revised: 06/24/2008] [Accepted: 06/27/2008] [Indexed: 10/21/2022]
|
6
|
Jiang Y, Myers MN, Giddings‡ JC. SEPARATION BEHAVIOR OF BLOOD CELLS IN SEDIMENTATION FIELD-FLOW FRACTIONATION. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100101728] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | | | - J. Calvin Giddings‡
- a Field-Flow Fractionation Research Center, Department of Chemistry , University of Utah , Salt Lake City , UT , 84112 , U.S.A
| |
Collapse
|
7
|
Battu S, Cook-Moreau J, Cardot PJ. SEDIMENTATION FIELD-FLOW FRACTIONATION: METHODOLOGICAL BASIS AND APPLICATIONS FOR CELL SORTING. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120014001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- S. Battu
- a Laboratoire de Chimie Analytique et Bromatologie , Faculté de Pharmacie , Université de Limoges , 2, rue du Dr Marcland, Limoges, 87025 Limoges Cedex, France
| | - J. Cook-Moreau
- b Laboratoire de Biochimie Médicale , Faculté de Médecine , Université de Limoges , 2, rue du Dr Marcland, Limoges, 87025 Limoges Cedex, France
| | - P. J.P. Cardot
- a Laboratoire de Chimie Analytique et Bromatologie , Faculté de Pharmacie , Université de Limoges , 2, rue du Dr Marcland, Limoges, 87025 Limoges Cedex, France
| |
Collapse
|
8
|
Cardot PJP, Launay JM, Martin M. Age-Dependent Elution of Human Red Blood Cells in Gravitational Field-Flow Fractionation. J LIQ CHROMATOGR R T 2006. [DOI: 10.1080/10826079708005579] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Philippe J P. Cardot
- a Laboratoire de Chimie Analytique et Bromatologie , Université de Limoges Faculté de Pharmacie , 2, rue du Docteur Marcland, 87000, Limoges, France
| | - Jean-Marie Launay
- b Hôpital Lariboisière Service de Biochimie et de Biologie Moléculaire 2, rue Ambroise Paré , 75475, Paris, Cedex 10, France
| | - Michel Martin
- c Ecole Supérieure de Physique et Chimie Industrielles Laboratoire , de Physique et Mécanique des Milieux Hétérogènes (URA CNRS 857) , 10, rue Vauquelin Cedex 05, 75231, Paris, France
| |
Collapse
|
9
|
Reschiglian P, Zattoni A, Roda B, Casolari S, Moon MH, Lee J, Jung J, Rodmalm K, Cenacchi G. Bacteria sorting by field-flow fractionation. Application to whole-cell Escherichia coil vaccine strains. Anal Chem 2002; 74:4895-904. [PMID: 12380810 DOI: 10.1021/ac020199t] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sorting and quantification of deactivated bacteria is an important way of quality control for whole-cell bacterial vaccines. In general, surface features of deactivated bacteria used for whole-cell bacterial vaccines affect the immunoresponse to bacteria-associated antigens. Enumeration of bacteria is also an important process development parameter for these vaccines. Field-flow fractionation (FFF) was previously applied to the separation of bacteria. For the first time, FFF is used for sorting bacteria strains of the same species on the basis of differences in bacterial membrane characteristics. Two FFF techniques, gravitational FFF (GrFFF) and asymmetrical flow FFF (AsFIFFF), are shown to be able to fractionate, distinguish, and quantify different deactivated Escherichia coli strains used for vaccines. E. coli can differ in the presence of fimbriae on the bacterial membrane. Fimbriae affect E. coli pathology and thus the use of E. coli for vaccines. GrFFF and AsFIFFF are able to fractionate fimbriated/ nonfimbriated cells in mixtures of different strains. While GrFFF is characterized by low cost and simplicity, As-FIFFF shows a higher performance in size fractionation with a high-speed separation. Coupled, on-line UV/visible turbidimetry yields the relative numbers of fractionated cells and sample recovery. Scanning electron microscopy and quasi-elastic light scattering are employed as uncorrelated techniques for size and morphology analysis of the E. coli strains.
Collapse
|
10
|
Sanz R, Torsello B, Reschiglian P, Puignou L, Galceran MT. Improved performance of gravitational field-flow fractionation for screening wine-making yeast varieties. J Chromatogr A 2002; 966:135-43. [PMID: 12214687 DOI: 10.1016/s0021-9673(02)00735-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Performance of gravitational field-flow fractionation (GFFF) is improved here with respect to the ability to fractionate and distinguish different varieties of wine-making yeast from Saccharomyces cerevisiae. A new GFFF channel with non-polar walls has been employed to enhance fractionation selectivity and reproducibility. Since GFFF retention depends from first principles on particle size, Coulter counter measurements were performed in order to compare size distribution profiles with GFFF profiles. From such a comparison, GFFF was shown to be able to reveal differences in yeast cells other than size. This could make use of GFFF for screening different varieties of wine-making yeast towards future quality assessment procedures based on a possible correlation between yeast cell morphology indexes and quality indexes.
Collapse
Affiliation(s)
- R Sanz
- Departament de Química Analítica, Universitat de Barcelona, Spain
| | | | | | | | | |
Collapse
|
11
|
Gale BK, Caldwell KD, Frazier AB. Geometric scaling effects in electrical field flow fractionation. 1. Theoretical analysis. Anal Chem 2001; 73:2345-52. [PMID: 11393862 DOI: 10.1021/ac001463q] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work outlines the fundamental scaling laws associated with electrical field flow fractionation channels. Although general FFF theory indicates few advantages from miniaturization, EFFF theory indicates clear advantages to miniaturization of the EFFF channel. Retention, plate heights, resolution, equilibration times, and time constants are examined. The outlined theory predicts scaling advantages in each of these areas after miniaturization. Potential applications, such as the use of these systems for sample preparation in microscale total analysis systems, and improvements associated with these theoretical predictions are also discussed.
Collapse
Affiliation(s)
- B K Gale
- Institute for Micromanufacturing, Louisiana Tech University, Ruston 71272, USA.
| | | | | |
Collapse
|
12
|
Janousková J, Budinská M, Plocková J, Chmelík J. Optimization of experimental conditions for the separation of small and large starch granules by gravitational field-flow fractionation. J Chromatogr A 2001; 914:183-7. [PMID: 11358212 DOI: 10.1016/s0021-9673(00)01090-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Separation of small and large barley starch granules by gravitational field-flow fractionation was investigated from the point of view of sample pre-treatment, amount of injected sample, and elution conditions. The sample pre-treatment study resulted in the conclusion that it is reasonable to soak the starch granules for at least 24 h prior to separation. The experiments with different amounts of injected sample show that it is possible to increase as well as decrease twofold the sample amount usually used without any change in retention ratios. The implementation of flow-rate gradients for elution of the starch granules reduced total separation time. However, the applied flow-rate gradients did not improve the resolution of peaks A and B compared with the generally used constant flow-rate. Thus, for barley starch granules, the constant flow-rates within the range from 0.8 to 1.0 ml/min seem to provide the best compromise of total separation time, peak resolution and instrumental expense.
Collapse
Affiliation(s)
- J Janousková
- Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Brno
| | | | | | | |
Collapse
|
13
|
Yang J, Huang Y, Wang XB, Becker FF, Gascoyne PR. Differential analysis of human leukocytes by dielectrophoretic field-flow-fractionation. Biophys J 2000; 78:2680-9. [PMID: 10777764 PMCID: PMC1300857 DOI: 10.1016/s0006-3495(00)76812-3] [Citation(s) in RCA: 166] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The differential analysis of human leukocytes has many important biological and medical applications. In this work, dielectrophoretic field-flow-fractionation (DEP-FFF), a cell-separation technique that exploits the differences in the density and dielectric properties of cells, was used to separate the mixtures of the major human leukocyte subpopulations (T- and B-lymphocytes, monocytes, and granulocytes). The separation was conducted in a thin chamber equipped with an array of microfabricated interdigitated electrodes on the bottom surface, and the separation performance was characterized by on-line flow cytometry. To investigate optimal separation conditions for different leukocyte mixtures, elution fractograms at various DEP field frequencies were obtained for each leukocyte subtype. With appropriately chosen conditions, high separation performance was achieved in separating T- (or B-) lymphocytes from monocytes, T- (or B-) lymphocytes from granulocytes, and monocytes from granulocytes. DEP-FFF does not involve cell-labeling or cell-modification step, and provides a new approach to hematological analysis.
Collapse
Affiliation(s)
- J Yang
- Department of Molecular Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
| | | | | | | | | |
Collapse
|
14
|
Chianéa T, Cardot PJ, Assidjo E, Monteil J, Clarot I, Krausz P. Field- and flow-dependent trapping of red blood cells on polycarbonate accumulation wall in sedimentation field-flow fractionation. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1999; 734:91-9. [PMID: 10574194 DOI: 10.1016/s0378-4347(99)00339-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sedimentation field-flow fractionation (SdFFF) instrumentation is now mature. Methodological procedure and particle separation development rules are well established even in the case of biological species. However, in some biological applications, retention properties of samples not predicted by any field-flow fractionation (FFF) elution models are observed. It is demonstrated that the trapping of cellular material in the separation system is not related to geometrical instrumentation features but to channel wall characteristics. The physicochemical particle-wall attractive interactions are different depending on the flow-rate and field intensity applied. Separation power in SdFFF for biological species is therefore limited by the intensity of these interactions. In terms of separation, a balance is to be found between external field and flow intensity to limit particle-wall interactions.
Collapse
Affiliation(s)
- T Chianéa
- Laboratoire de Chimie Analytique et Bromatologie, Université de Limoges, Faculté de Pharmacie, France
| | | | | | | | | | | |
Collapse
|
15
|
Assidjo E, Chianéa T, Dreyfuss MF, Cardot PJ. Validation procedures of sedimentation field-flow fractionation techniques for biological applications. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1998; 709:197-207. [PMID: 9657216 DOI: 10.1016/s0378-4347(98)00061-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Sedimentation field-flow fractionation (SdFFF) offers great potential for the separation of submicrometer and micrometer-sized species. The availability of commercial instrumentation and the versatility of this method originated its success. At this stage of development, SdFFF techniques are mature enough for use in analytical research, development and even routine work. However, prior to their use, these techniques like any other methodologies, have to be validated. As the application of SdFFF techniques to cell separation is being constantly developed, we have investigated separation performance according to validation rules classically defined for separation methods (chromatography) in the case of cellular materials.
Collapse
Affiliation(s)
- E Assidjo
- Laboratoire de Chimie Analytique et de Bromatologie, Université de Limoges, Faculté de Pharmacie, France
| | | | | | | |
Collapse
|
16
|
Wang XB, Vykoukal J, Becker FF, Gascoyne PR. Separation of polystyrene microbeads using dielectrophoretic/gravitational field-flow-fractionation. Biophys J 1998; 74:2689-701. [PMID: 9591693 PMCID: PMC1299609 DOI: 10.1016/s0006-3495(98)77975-5] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The characterization of a dielectrophoretic/gravitational field-flow-fractionation (DEP/G-FFF) system using model polystyrene (PS) microbeads is presented. Separations of PS beads of different surface functionalization (COOH and none) and different sizes (6, 10, and 15 microm in diameter) are demonstrated. To investigate the factors influencing separation performance, particle elution times were determined as a function of particle suspension conductivity, fluid flow rate, and applied field frequency and voltage. Experimental data were analyzed using a previously reported theoretical model and good agreement between theory and experiment was found. It was shown that separation of PS beads was based on the differences in their effective dielectric properties. Particles possessing different dielectric properties were positioned at different heights in a fluid-flow profile in a thin chamber by the balance of DEP and gravitational forces, transported at different velocities under the influence of the fluid flow, and thereby separated. To explore hydrodynamic (HD) lift effects, velocities of PS beads were determined as a function of fluid flow rate in the separation chamber when no DEP field was applied. In this case, particle equilibrium height positions were governed solely by the balance of HD lift and gravitational forces. It was concluded that under the experimental conditions reported here, the DEP force was the dominant factor in controlling particle equilibrium height and that HD lift force played little role in DEP/G-FFF operation. Finally, the influence of various experimental parameters on separation performance was discussed for the optimization of DEP/G-FFF.
Collapse
Affiliation(s)
- X B Wang
- Department of Experimental Pathology, University of Texas M. D. Anderson Cancer Center, Houston 77030, USA.
| | | | | | | |
Collapse
|
17
|
Metreau JM, Gallet S, Cardot PJ, Le Maire V, Dumas F, Hernvann A, Loric S. Sedimentation field-flow fractionation of cellular species. Anal Biochem 1997; 251:178-86. [PMID: 9299014 DOI: 10.1006/abio.1997.2271] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
More than 15 years ago a pioneering report on the separation of cellular material using sedimentation field-flow fractionation (SdFFF) was published. Surprisingly, only a few reports on SdFFF applications to cell separations are available as yet. The major limitations which seemed to slow the development of SdFFF applications in biology appeared to be related to the development of specific instrumentation. Therefore, guidelines are given for setting up a biocompatible SdFFF apparatus. SdFFF elution of cells with different characteristics was performed to demonstrate the efficiency, completeness, and rapidity of cell separations by this method. Retention data describing the effect of lifting forces on nucleated cells are compared to those for red blood cells (RBC). The effects of flow rates, field intensity, and injection protocol were studied using normal human RBC eluted in isotonic medium as a probe for retention conditions. When possible, data were also compared to previously published reports. Guidelines for elution and separation optimization are given. Using mixtures of nucleated and living red blood cells, viability studies showed a surprisingly high recovery of each type of material.
Collapse
Affiliation(s)
- J M Metreau
- Faculté de Pharmacie, Université de Paris Sud, Rue J.B. Clément, Châtenay Malabry, F 92290, France
| | | | | | | | | | | | | |
Collapse
|