Biomaterial Database

Immunoturbidimetric assay for estimating free light chains of immunoglobulins in urine and serum. 1991

C R Tillyer, and J Iqbal, and J Raymond, and M Gore, and T J McIlwain

Department of Chemical Pathology, Royal Marsden Hospital, Sutton, Surrey.

An immunoturbidimetric assay for the assessment of free kappa and lambda light chains of immunoglobulins was developed using a commercial polyclonal antiserum with reactivity towards epitopes on the light chains, which are not expressed when they are bound to heavy chains. The assay, on a centrifugal analyser, is simple and rapid. The limit of detection is 5 mg/l of free light chain, with an assay range of 5-120 mg/l, intrabatch precisions from 1.5-6.4%, and interbatch precisions from 6.5-8.9%. The assay was only slightly less sensitive than colloidal gold staining of cellulose acetate electrophoreses for the detection of Bence-Jones protein in urine. For the serial monitoring of response to chemotherapy in patients with myeloma, the assay correlated well with serum paraprotein estimates obtained by densitometric scanning of Ponceau stained cellulose acetate electrophoreses, but not with serum beta-2 microglobulin measurements, even after correction for the effects of creatinine. These assays may prove to be of use for the monitoring of tumour response in the treatment of Bence-Jones myeloma.

UI	MeSH Term	Description	Entries
D007106	Immune Sera	Serum that contains antibodies. It is obtained from an animal that has been immunized either by ANTIGEN injection or infection with microorganisms containing the antigen.	Antisera,Immune Serums,Sera, Immune,Serums, Immune
D007145	Immunoglobulin kappa-Chains	One of the types of light chains of the immunoglobulins with a molecular weight of approximately 22 kDa.	Ig kappa Chains,Immunoglobulins, kappa-Chain,kappa-Immunoglobulin Light Chains,Immunoglobulin kappa-Chain,kappa-Chain Immunoglobulins,kappa-Immunoglobulin Light Chain,kappa-Immunoglobulin Subgroup VK-12,kappa-Immunoglobulin Subgroup VK-21,Chains, Ig kappa,Immunoglobulin kappa Chain,Immunoglobulin kappa Chains,Immunoglobulins, kappa Chain,Light Chain, kappa-Immunoglobulin,Light Chains, kappa-Immunoglobulin,kappa Chain Immunoglobulins,kappa Chains, Ig,kappa Immunoglobulin Light Chain,kappa Immunoglobulin Light Chains,kappa Immunoglobulin Subgroup VK 12,kappa Immunoglobulin Subgroup VK 21,kappa-Chain, Immunoglobulin,kappa-Chains, Immunoglobulin
D007146	Immunoglobulin lambda-Chains	One of the types of light chain subunits of the immunoglobulins with a molecular weight of approximately 22 kDa.	Ig lambda Chains,Immunoglobulins, lambda-Chain,Immunoglobulin lambda-Chain,lambda-1-Immunoglobulin,lambda-2-Immunoglobulin,lambda-Chain Immunoglobulins,lambda-Immunoglobulin Light Chain,lambda-Immunoglobulin Light Chains,lambda-x Immunoglobulin,Chains, Ig lambda,Chains, lambda-Immunoglobulin Light,Immunoglobulin lambda Chain,Immunoglobulin lambda Chains,Immunoglobulin, lambda-x,Immunoglobulins, lambda Chain,Light Chain, lambda-Immunoglobulin,Light Chains, lambda-Immunoglobulin,lambda 1 Immunoglobulin,lambda 2 Immunoglobulin,lambda Chain Immunoglobulins,lambda Chains, Ig,lambda Immunoglobulin Light Chain,lambda Immunoglobulin Light Chains,lambda x Immunoglobulin,lambda-Chain, Immunoglobulin,lambda-Chains, Immunoglobulin
D009101	Multiple Myeloma	A malignancy of mature PLASMA CELLS engaging in monoclonal immunoglobulin production. It is characterized by hyperglobulinemia, excess Bence-Jones proteins (free monoclonal IMMUNOGLOBULIN LIGHT CHAINS) in the urine, skeletal destruction, bone pain, and fractures. Other features include ANEMIA; HYPERCALCEMIA; and RENAL INSUFFICIENCY.	Myeloma, Plasma-Cell,Kahler Disease,Myeloma, Multiple,Myeloma-Multiple,Myelomatosis,Plasma Cell Myeloma,Cell Myeloma, Plasma,Cell Myelomas, Plasma,Disease, Kahler,Multiple Myelomas,Myeloma Multiple,Myeloma, Plasma Cell,Myeloma-Multiples,Myelomas, Multiple,Myelomas, Plasma Cell,Myelomas, Plasma-Cell,Myelomatoses,Plasma Cell Myelomas,Plasma-Cell Myeloma,Plasma-Cell Myelomas
D009391	Nephelometry and Turbidimetry	Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering. In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured. In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam.	Turbidimetry,Nephelometry,Turbidimetry and Nephelometry
D012016	Reference Values	The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.	Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D002138	Calibration	Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output.	Calibrations
D003429	Cross Reactions	Serological reactions in which an antiserum against one antigen reacts with a non-identical but closely related antigen.	Cross Reaction,Reaction, Cross,Reactions, Cross
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000912	Antibodies, Neoplasm	Immunoglobulins induced by antigens specific for tumors other than the normally occurring HISTOCOMPATIBILITY ANTIGENS.	Neoplasm Antibodies,Tumor Antibodies,Antibodies, Tumor