2
|
Prochetto SD, Gonzalez VDG, Garcia VS, Vanasco NB, Lottersberger J, Gugliotta LM. Latex particles sensitized with proteins ofLeptospira interrogansfor application in immunoagglutination assays. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2016.1276058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Santiago D. Prochetto
- INTEC, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Verónica D. G. Gonzalez
- INTEC, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Litoral, Santa Fe, Argentina
- Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Valeria S. Garcia
- INTEC, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Norma B. Vanasco
- Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
- Administración Nacional de Laboratorios e Institutos de Salud “Dr. Carlos G. Malbran,” Instituto Nacional de Enfermedades Respiratorias “Dr. Emilio Coni,” Santa Fe, Argentina
| | - Javier Lottersberger
- Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Luis M. Gugliotta
- INTEC, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Litoral, Santa Fe, Argentina
| |
Collapse
|
3
|
Garcia VS, Gonzalez VDG, Marcipar IS, Vega JR, Gugliotta LM. Optimisation and standardisation of an immunoagglutination assay for the diagnosis of Trypanosoma cruzi infection based on latex-(recombinant antigen) complexes. Trop Med Int Health 2013; 19:37-46. [PMID: 24219561 DOI: 10.1111/tmi.12225] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To determine the conditions under which the immunoagglutination assay to detect Chagas disease, obtained from a novel latex-(chimeric recombinant antigen) complex, shows greater discrimination between the responses of a positive control serum and a negative control serum. METHODS The following variables were determined: (i) the sensitisation mechanism, (ii) the emulsifier employed for protein desorption, (iii) the reaction time, (iv) the ionic strength of the reaction medium, (v) the particle concentration, (vi) the presence of blocking agents, (vii) the presence of polyethyleneglycol as potentiator of reaction and (viii) the antigen and antibody concentrations. The search of optimal conditions was investigated by varying one variable at a time. To this effect, monodisperse latex particles sensitised with a recombinant chimeric protein (CP1) were subjected to different conditions. The agglutination reaction was followed by measuring the changes in the optical absorbance by turbidimetry. RESULTS The maximum discrimination between negative and positive sera was obtained at a reaction time of 5 min, when latex complexes with a concentration of covalently coupled protein of 2.90 mg/m(2) were put in contact with undiluted sera in buffer borate pH 8-20 mm containing glycine (0.1 m) and polyethyleneglycol 8000 (3% w/v). Finally, the latex-protein complex was tested under the obtained optimal conditions, with a panel of Trypanosoma cruzi-positive sera, leishmaniasis-positive sera and -negative sera for both parasites. CONCLUSION The immunoagglutination test based on the latex-CP1 complex could be used as a screening method for detecting Chagas disease. This test is rapid, easy to implement and could be used under field conditions; but its results should be confirmed by reference techniques like ELISA, HAI, and IFI.
Collapse
Affiliation(s)
- Valeria S Garcia
- INTEC, Universidad Nacional del Litoral and CONICET, Santa Fe, Argentina
| | | | | | | | | |
Collapse
|
6
|
Mazuel F, Bui C, Charleux B, Cabet-Deliry E, Winnik MA. Interdiffusion and Self-Cross-Linking in Acetal-Functionalized Latex Films. Macromolecules 2004. [DOI: 10.1021/ma049307z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Florence Mazuel
- Laboratoire de Chimie des Polymères (UMR 7610 associée au CNRS), Université Pierre et Marie Curie, Paris 6, Case 185, 4, Place Jussieu, 75252 Paris Cedex 05, France, Laboratoire d'Electrochimie Moléculaire (UMR 7591 associée au CNRS), Université René Diderot, Paris 7, 2, Place Jussieu, 75251, Paris Cedex 05, France, and Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON M5S 3H6, Canada
| | - Chuong Bui
- Laboratoire de Chimie des Polymères (UMR 7610 associée au CNRS), Université Pierre et Marie Curie, Paris 6, Case 185, 4, Place Jussieu, 75252 Paris Cedex 05, France, Laboratoire d'Electrochimie Moléculaire (UMR 7591 associée au CNRS), Université René Diderot, Paris 7, 2, Place Jussieu, 75251, Paris Cedex 05, France, and Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON M5S 3H6, Canada
| | - Bernadette Charleux
- Laboratoire de Chimie des Polymères (UMR 7610 associée au CNRS), Université Pierre et Marie Curie, Paris 6, Case 185, 4, Place Jussieu, 75252 Paris Cedex 05, France, Laboratoire d'Electrochimie Moléculaire (UMR 7591 associée au CNRS), Université René Diderot, Paris 7, 2, Place Jussieu, 75251, Paris Cedex 05, France, and Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON M5S 3H6, Canada
| | - Eva Cabet-Deliry
- Laboratoire de Chimie des Polymères (UMR 7610 associée au CNRS), Université Pierre et Marie Curie, Paris 6, Case 185, 4, Place Jussieu, 75252 Paris Cedex 05, France, Laboratoire d'Electrochimie Moléculaire (UMR 7591 associée au CNRS), Université René Diderot, Paris 7, 2, Place Jussieu, 75251, Paris Cedex 05, France, and Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON M5S 3H6, Canada
| | - Mitchell A. Winnik
- Laboratoire de Chimie des Polymères (UMR 7610 associée au CNRS), Université Pierre et Marie Curie, Paris 6, Case 185, 4, Place Jussieu, 75252 Paris Cedex 05, France, Laboratoire d'Electrochimie Moléculaire (UMR 7591 associée au CNRS), Université René Diderot, Paris 7, 2, Place Jussieu, 75251, Paris Cedex 05, France, and Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON M5S 3H6, Canada
| |
Collapse
|
7
|
Izquierdo MPS, Martín-Molina A, Ramos J, Rus A, Borque L, Forcada J, Galisteo-González F. Amino, chloromethyl and acetal-functionalized latex particles for immunoassays: a comparative study. J Immunol Methods 2004; 287:159-67. [PMID: 15099764 DOI: 10.1016/j.jim.2004.01.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2003] [Revised: 12/19/2003] [Accepted: 01/27/2004] [Indexed: 10/26/2022]
Abstract
Latex particles with different functionalized surface groups (amino, acetal and chloromethyl) for the covalent linking of protein molecules were synthesized and characterized. Immunopurified anti-ferritin antibodies were then covalently coupled with a mean efficiency rate (protein covalently bound to latex particles with respect to the total amount of protein added) of 60%. The reagents developed were applied to the measurement of serum ferritin concentration in a turbidimetric procedure, showing a good measuring range and a lowest detection limit of 3.5 ng/ml in the case of the amino-modified particles. These immunological reagents were compared with a commercial nephelometric method, showing a good linear correlation in all cases but no transferability in the acetal and chloromethyl latex with additional carboxyl groups, probably due to interference with other serum components. The differences among latex found in this study indicate that it would be necessary to optimize the assay conditions for each type of particle, in order to achieve a maximum immunoreactivity.
Collapse
Affiliation(s)
- M P Sanz Izquierdo
- Laboratorio de Análisis Clínicos, Complejo Hospitalario San Millán-San Pedro, Logroño (La Rioja), Spain
| | | | | | | | | | | | | |
Collapse
|