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https://hdl.handle.net/2440/17229
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Type: | Journal article |
Title: | Establishment, value assignment, and characterization of new WHO reference reagents for six molecular forms of human chorionic gonadotropin |
Author: | Bristow, A. Berger, P. Bidart, J. Birken, S. Norman, R. Stenman, U. Sturgeon, C. |
Citation: | Clinical Chemistry (Washington, DC): international journal of molecular diagnostics and laboratory medicine, 2005; 51(1):177-182 |
Publisher: | Amer Assoc Clinical Chemistry |
Issue Date: | 2005 |
ISSN: | 0009-9147 1530-8561 |
Statement of Responsibility: | Adrian Bristow, Peter Berger, Jean-Michel Bidart, Steven Birken, Robert Norman, Ulf-Håkan Stenman and Catharine Sturgeon |
Abstract: | Background: The International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) established a Working Group to investigate means of improving the comparability of immunoassays for human chorionic gonadotropin (hCG), which was selected as a prototype glycoprotein analyte. The Working Group identified development of unambiguous nomenclature and production of new highly purified International Reference Reagents calibrated in substance concentrations as its primary objectives. Methods: Preparations of intact hCG, nicked hCG, hCG ß-subunit, nicked hCG ß-subunit, hCG -subunit, and hCG ß-core fragment were purified from a crude urinary hCG preparation, ampouled, lyophilized, and assigned values in substance concentrations (mol/L). Value assignment and accelerated degradation studies were carried out in accordance with WHO protocols for International Reference Reagents. Results: The ampouled standards were assigned final values based on the recovery of immunoreactive material after reconstitution. The degradation studies showed that the standards were highly stable. Conclusions: The nomenclature of hCG-related molecules and immunoassays has been adopted by the IFCC, and the standards prepared and characterized by the Working Group have been formally adopted by the WHO as the First International Reference Reagents for six hCG-related molecules. These developments will enable better understanding of what assays for hCG measure and should ultimately help to improve the clinical application of these assays. |
Keywords: | IFCC Working Group on hCG Humans Chorionic Gonadotropin Protein Subunits Immunoassay Reference Standards World Health Organization Terminology as Topic |
Rights: | © 2005 American Association for Clinical Chemistry, Inc |
DOI: | 10.1373/clinchem.2004.038679 |
Published version: | http://dx.doi.org/10.1373/clinchem.2004.038679 |
Appears in Collections: | Aurora harvest 6 Obstetrics and Gynaecology publications |
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