Recently, turbidimetric immunoassays for detecting and quantifying and free light chains (FLC) have become available and are promoted as being more sensitive than immunofixation electrophoresis (IFE) in detecting FLC monoclonal proteins. In this study, we assessed the ability of these turbidimetric assays to detect serum monoclonal proteins involving both free and heavy-chain-bound and light ch...

A 59-year-old male was diagnosed with nephrotic syndrome secondary to light-chain deposition disease. There was no other evidence of a B cell clonal disorder or amyloidosis; circulating free light chains were identified using a new immunoassay (Freelite) and used to monitor disease progression. Improvement in renal function and proteinuria following VAMP chemotherapy correlated with a reduction...

The humoral adaptive immune system of sharks is partly based on the same H2L2 heterodimeric antibody structure seen in all jawed vertebrates (reviewed in Flajnik 2002). The constituent vertebrate immunoglobulin (Ig) heavy (H) and light (L) chains provide obligate defense against pathogens and their toxins via neutralization, opsonization, and activation of the classical pathway of the complemen...

The kappa-lambda light chain ratios, the presence of free light chains and the double ring formation, with antikappa and antilambda serum, in single radial immunodiffusion were investigated in serum and cerebrospinal fluid of patients with subacute sclerosing panencephalitis. Cerebrospinal fluid samples of several multiple sclerosis cases were considered simultaneously. The results obtained sug...

UNLABELLED BACKGROUND The development of serum immunoassays for the measurement of immunoglobulin free light chains has led to a paradigm shift in the diagnosis, assessment and monitoring of patients with plasma cell dyscrasias. The impact of these immunoassays which employ polyclonal antibodies was most notable for those patients who were previously classified as non-secretory multiple myel...

Free and membrane-bound ribosomes have been isolated from a mouse plasma cell tumor secreting immunoglobulins, and allowed to synthesize proteins under cell-free conditions. Analysis of the products of synthesis by autoradiography of immunoelectrophoresis and peptide maps indicates that both types of ribosomes synthesize heavy and light immunoglobulin chains.