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Abnormal free light chain production has also been reported to be prognostic of a worse outcome in multiple myeloma [36] [37] [38] and chronic lymphocytic leukaemia. [39] An abnormal light-chain ratio has been defined as a kappa to lambda chain ratio of less than 0.26 or more than 1.65. [32]
Each light chain is composed of two tandem immunoglobulin domains: one constant (C L) domain; one variable domain (V L) that is important for binding antigen; The approximate length of a light chain protein is from 211 to 217 amino acids. [3] The constant region determines what class (kappa or lambda) the light chain is. [8]
Light chain deposition disease can affect any organ. [3] Renal involvement is always present and can be identified by microscopic hematuria and proteinuria.Due to the gradual buildup of light chains from plasma filtration, renal function rapidly declines in the majority of patients with LCDD as either acute tubulointerstitial nephritis or rapidly progressing glomerulonephritis.
Light chain MGUS is defined as a disorder in which a serum κ to λ free light chain ratio falls outside the normal range of 0.26–1.65 (mean =0.9) provided that it is not associated with: a) any of the CRAB criteria, b) a bone marrow plasma cell count of 10 or a higher percentage of nucleated cells, c) evidence of amyloid deposition (see ...
AL amyloidosis is caused by the deposition of abnormal antibody free light chains. The abnormal light chains are produced by monoclonal plasma cells, and, although AL amyloidosis can occur without diagnosis of another disorder, it is often associated with other plasma cell disorders, such as multiple myeloma and Waldenström's macroglobulinemia. [6]
Bence Jones protein is a monoclonal globulin protein or immunoglobulin light chain found in the urine, with a molecular weight of 22–24 kDa. [1] Detection of Bence Jones protein may be suggestive of multiple myeloma , [ 2 ] or Waldenström's macroglobulinemia .
The remainder get solutions with anti-IgG, anti-IgA, anti-IgM, anti-kappa light chain and anti-lambda light chain immunoglobulin, respectively from left to right. Each anti-immunoglobulin solution is artificially colored to ensure that the solution matches the color map at top. Immunofixation electrophoresis, schematic representation:
Anti-Kappa Light Chain Type Description; Anti-Kappa Light Chain [NH3/41.34] This is a recombinant monoclonal antibody to the kappa light chain. Specifically, [NH3/41.34] binds to IgG antibodies via Western blot. There is no cross reactivity with cynomolgus monkey IgG1 and cynomolgus monkey IgG4, which are recognized by Anti-IgG [NH3/130.5.2]. [23]