Such assays are suitable for the measurement of proteins at concentrations >5– 10 mg/L. .. Development of an automated immunoturbidimetric ferritin assay. May 3, Different laboratory methods are used to quantify ferritin . assays and automated equipment developments, and in routine laboratory assays and Seco M. Development of an automated immunoturbidimetric ferritin assay. J. Colloid. Interface Sci. (2): – 3. Borque, L., Rus, A., Bellod, L., and Seco, M.L. Development of an automated immunoturbidimetric ferritin assay.

Author: Dosho Kigakasa
Country: Portugal
Language: English (Spanish)
Genre: Marketing
Published (Last): 18 December 2007
Pages: 233
PDF File Size: 10.51 Mb
ePub File Size: 11.31 Mb
ISBN: 972-7-37006-221-7
Downloads: 63548
Price: Free* [*Free Regsitration Required]
Uploader: Fenrirn

The detection limits for CRP, defined as the mean plus 3 SD of the zero signal saline solutionwere 0.

The microparticle reagents were prepared according to a previously published method by the carbodiimide [1-ethyl 3-dimethylamino-propyl carbodiimide chloride] procedure Clin Chem ; 42 Suppl 6: Eur J Pediatr ; Show more Technical Briefs. For practical use, it is essential to obtain microparticle reagents colloidally stable under reaction and storage conditions, with the automatec often depending on protein coverage.

Results obtained with the present procedure correlated well immunoturbidimetriic those obtained by a nephelometric procedure and with those obtained by an RIA.

The turbidimetric method affords a measuring range of 0.

Biomarker Menu

Covalent isotherm A and dose—response curves as a function of antibody type and coverage B and particle size C. There were no interferences from bilirubin, hemoglobin or rheumatoid factors.


We chose fo microparticle reagent, with a coverage of 0.

Variability in the measurement of C-reactive protein in healthy subjects: Parameter values abcorrelation coefficients rand confidence regions were as follows: Nevertheless, these results can be influenced by the sensitivity of the methodology used for CRP quantification. Thomas C, Thomas L. We describe a microparticle reagent that we use in an optimized turbidimetric procedure with immunopurified polyclonal antibodies against Atomated.

A microparticle size of nm and a wavelength of nm immunoturbidlmetric selected as the best choice because of the autommated slope and wide dynamic range showed. Posttreatment with additives BSA, surfactants has been proposed 13 14although it reduces IgG charge and reactivity.

This approach to antibody immunopurification could be extended to obtain reagents useful for the measurement of several other proteins at low concentrations Coverage was calculated by measuring the uncoupled IgG present in the supernatants of the first centrifugation, after filtering with a Nucleopore polycarbonate filter pore diameter, 0.

Recent studies of CRP concentrations within the conventional reference interval have suggested new clinical applications.

The covalently coupled isotherms of IgG anti-CRP feritin carboxyl-modified polystyrene particles nm diameter are shown in Fig. Ferritin is protein that has a central role in the storage of iron.

Some use expensive monoclonal antibodies, and others use higher sample volumes and antibody concentrations in the reaction mixtures, which can increase nonspecific reactions Research Article Technical Brief.

Download this assay page in pdf format. Carboxilated latex particles nm in diameter were covalently coupled with immunopurified F ab’ 2 fragments of anti-ferritin IgG antibodies.


Development of an automated immunoturbidimetric ferritin assay.

Polyethyleneglycol PEG is commonly used qutomated increase the immunoagglutination kinetics. In this way, the inactive IgG molecules are replaced with molecules of BSA, remarkably increasing the latex stability by electrostatic repulsion.

Skip to main content. Test Directory Entire Site. After elution, the released protein was measured using the BCA procedure. Colloidal stability and immunoreactivity. Ferritin is an acute-phase respondent, and so individuals with conditions association with an inflammatory response may have elevated serum ferritin levels that are not directly related iron stores. Auto,ated determinations are widely used for monitoring renal anemia when iron utilization and distribution disorders are auhomated during therapy with erythropoietin.

Clin Chem ; 45 Suppl 6: Clin Chem ; Jadsamount of antibody adsorbed; Jinamount of antibody added. Table of Contents Index by author. The determination of ferritin is useful in diagnosis of defects in iron metabolism, monitoring iron therapy, ascertaining the iron reserves in groups at risk and in the differential diagnosis of anemias.

Clinical Chemistry Nov46 11 .