light chain


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Related to light chain: Myosin light chain kinase

light chain

[′līt ′chān]
(immunology)
The smaller of the two types of chains found in immunoglobulin molecules, molecular weight 23,500. Also known as B chain; L chain.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Caelum's lead asset, CAEL-101, is a novel antibody for the treatment of patients with amyloid light chain (AL) amyloidosis.
AL amyloidosis is a rare systemic disorder that causes misfolded immunoglobulin light chain protein to build up in and around tissues, resulting in progressive and widespread organ damage, most commonly to the heart and kidneys.
The team first isolated individual light chains from nine patients with bone marrow disorders that caused multiple myeloma or amyloidosis, then ran lab experiments to determine how the green tea compound affected the light chain protein.
Analytical issues of serum free light chain assays and the relative performance of polyclonal and monoclonal based reagents.
Caption: Figure 4: Densitometric profile and SDS-PAGE of a pool of 15 myofibrillar extracts obtained from sole, European hake, and sea bass samples extracted with denaturing (a) and nondenaturing (b) solutions (1 = myosin heavy chain; 2 = 180-110 kDa; 3 = [alpha]-actinin; 4 = 95-55 kDa; 5 = desmin; 6 = 51-47 kDa; 7 = actin; 8 = 40-38 kDa; 9 = tropomyosin; 10 = 33-23 kDa; 11 = myosin light chain 1; 12 = 21-18 kDa; 13 = 16 kDa; 14 = myosin light chain 2; 15 = 14-10 kDa).
Thus, further studies to evaluate immunoglobulin subclasses and light chain staining in similar cases are needed to elucidate the pathogenesis of this previously unrecognized renal injury etiology in patients with liver cirrhosis.
Bortezomib with or without dexamethasone in primary systemic (light chain) amyloidosis.
Protein electrophoresis revealed an M-spike in the gamma fraction (1.0 g/dL), urine immunofixation showed monoclonal lambda and IgG lambda fragments, serum-free light chains (FLC) were 7.29 mg/dL (0.5700-2.63 mg/dL), and a kappa/lambda ratio was 0.1550 (0.2600-1.65).
The addition of serum free light chains (sFLC) and IFE increases detection of MM to >99% and is consistent with the International Myeloma Working Group recommended guidelines.
Reduction of the purified ferret Ig into heavy and light chain components confirmed the presence of both Ig[mu] and Ig[gamma] on the basis of their differential sizes (Figure 1, lane 5) [26].
This case highlights salient features of classical WM, describes difficulties that can be encountered in establishing a diagnosis of WM when monoclonal IgM and total serum IgM levels are extremely low, expands upon the concept of "free light chain only" WM, comments on the recent addition of MYD88 L265P testing to the 2016 NCCN Guidelines, reiterates the role of MYD88 in both the differential diagnosis of WM from other forms of NHL, and briefly highlights the influence of the MYD88 status on response to targeted therapy with the Bruton Tyrosine Kinase inhibitor, ibrutinib.