Search results for "immunoglobulin light chain"
showing 10 items of 29 documents
Associations between atopic diseases and the polymorphic systems ABO, Kidd, Inv and red cell acid phosphatase.
1979
In 239 German patients with atopic conditions (atopic dermatitis, hay fever, allergic rhinitis, bronchial asthma, and acute urticaria) the phenotype and gene distribution of 15 genetic blood polymorphisms (ABO, MNSs, rhesus, P, Kell, Duffy, Kidd, Hp, Gc, Gm, Inv, aP, PGM1, EsD, and 6-PGD) were analyzed and compared with those in 151 selected controls (individuals clinically free of allergic conditions and without allergy in the family history). The incidence of blood group antigens A and B was somewhat higher in patients than in controls. These observations are in accordance with the results of previous studies in other populations. In addition, our observations favor the hypothesis that th…
Structural and functional characterization of a human IgG monoclonal antiphospholipid antibody
2009
Antiphospholipid antibodies (aPL) are likely involved in the pathogenesis of the antiphospholipid syndrome (APS). This study analyzes the structural and functional characteristics of a human monoclonal aPL (HL7G) from the IgG2 subtype with λ light chains generated from a patient with primary APS and recurrent cerebral microemboli. DNA encoding the variable region of heavy and light chains of the antibody was sequenced, analyzed, and compared to HL5B a previously described monoclonal aPL from the same patient. Both antibodies are derived from the same germline genes. HL7G had similar but more extensive somatic mutations in the CDR1 and 2 regions than HL5B, indicating that both antibodies are…
Noradrenaline release from permeabilized synaptosomes is inhibited by the light chain of tetanus toxin
1992
AbstractNoradrenaline release from rat brain cortical synaptosomes permeabilized with streptolysin O can be triggered by μM concentrations of free Ca2+. This process was inhibited within minutes by tetanus toxin and its isolated light chain, but not by its heavy chain. The data demonstrate that the effect of tetanus toxin on NA release from purified synaptosomes is caused by the intraterminal action of its light chain.
The cumulative amount of serum-free light chain is a strong prognosticator in chronic lymphocytic leukemia.
2011
AbstractIdentification of patients at risk of early disease progression is the mainstay of tailored management in chronic lymphocytic leukemia (CLL). Although application of established biomarkers is limited by intrinsic detection/readout complexities, abnormality of κ and λ serum-free light chain ratio [sFLC (κ/λ)] was proposed as a straightforward prognosticator in CLL. By analyzing 449 therapy-naive patients, we show that an abnormal sFLC(κ/λ), along with CD38, ZAP-70, IGHV mutations, cytogenetics and stage, independently predicts treatment-free survival (TFS) but becomes prognostically irrelevant if the cumulative amount of clonal and nonclonal FLCs [sFLC(κ + λ)], a variable associated …
Cryptic Insertions Of The Immunoglobulin Light Chain Enhancer Region Near CCND1 In T(11;14)-Negative Mantle Cell Lymphoma
2019
Cyclin D1+ mantle cell lymphoma (MCL) is molecularly characterized by the t(11;14)(q13;q32) or rearrangements of CCND1 gene with the immunoglobulin (IG) light chains.1,2 Most MCL can be diagnosed based on the characteristic pathologic features and cyclin D1 expression without the need for demonstrating the genetic translocation. However, in cases with atypical morphologic or phenotypic features other B-cell neoplasms that sometimes also have cyclin D1 positivity may be in the differential diagnosis.1 In these situations the detection of the CCND1 rearrangements may assist in the diagnosis since most other lymphomas do not carry translocations of the gene.3-7 A subset of plasma cell myelomas…
Liver failure caused by light chain deposition disease associated with multiple myeloma.
2012
Acute liver failure is an unusual complication in multiple myeloma. Here, we report a case of multiple myeloma with light chain deposition disease (LCDD) that presented with progressive jaundice due to intrahepatic cholestasis. Diagnosis was made after liver biopsy that showed deposition of kappa light chains occupying perisinusoidal spaces. The patient developed encephalopathy and liver failure and died despite prompt initiation of dexamethasone therapy. The current prognosis of multiple myeloma patients with liver failure due to LCDD is dismal. New therapeutic strategies might improve this condition.
Generation and characterization of three monoclonal IgM antiphospholipid antibodies recognizing different phospholipid antigens.
2005
Antiphospholipid antibodies (APLs) might be involved in the pathogenesis of the antiphospholipid syndrome (APS). This study analyzes the structural characteristics of monoclonal APLs derived from patients with this disease. Patient-derived B cells were immortalized using Epstein-Barr virus transformation and subsequent fusion to the myeloma cell line CB-F7. APL-producing hybridomas were cloned to obtain cell lines producing monoclonal APL. DNA encoding the variable region of heavy and light chains of the antibodies was sequenced and analyzed regarding their usage within the V-gene family and the existence of somatic hypermutation. Binding patterns of APL to various phospholipids and beta-2-…
Cerebrospinal Fluid Analysis in Multiple Sclerosis Diagnosis: An Update
2019
Multiple sclerosis (MS) is an immune-mediated demyelinating disease of the central nervous system (CNS) with brain neurodegeneration. MS patients present heterogeneous clinical manifestations in which both genetic and environmental factors are involved. The diagnosis is very complex due to the high heterogeneity of the pathophysiology of the disease. The diagnostic criteria have been modified several times over the years. Basically, they include clinical symptoms, presence of typical lesions detected by magnetic resonance imaging (MRI), and laboratory findings. The analysis of cerebrospinal fluid (CSF) allows an evaluation of inflammatory processes circumscribed to the CNS and reflects chan…
The role of serum free light chain as biomarker of Myasthenia Gravis
2022
Background and aim: Myasthenia gravis (MG) is a B lymphocyte–mediated disease affecting neuromuscular transmission. The clinical course of MG is unpredictable due to the fluctuating nature and heterogeneity of the disease. Increased levels of free light chains (FLC), which reflect B cell activation, have been detected in different autoimmune disorders. In this study, we evaluated the potential role of FLC as diagnostic and prognostic biomarkers of MG. Materials and methods: 74 MG patients and 52 healthy individuals were included in the study. Serum FLC levels were measured by turbidimetric assay (Freelite, The Binding Site Group Ltd) on the Optilite Analyser System in both groups. In MG pat…
Use of the cumulative amount of serum-free light chains (sFLC) at diagnosis and PET2 for the early identification of high risk of treatment failure i…
2012
8083 Background: Since early identification of patients (pts) at risk of failure is the mainstay of a risk-adapted therapy, we explored the prognostic impact of the sFLC assay in cHL, whose biology involves ongoing activation of polyclonal B-cells. Methods: Serum samples from 248 untreated cHL pts were tested by the Freelite assay. Median age was 32 yrs (r 15-85), males 47%, stages: I (5%), II (51%), III (17%), IV (27%); B-sympt. 60%, E-disease, 38%; bulky >10 cm, 44%; ESR > 65, 42%; IPS ≥3, 39%. Early unfavorable disease (GHLSG/ EORTC) was respectively found in 33% and 42% of cases. ABVD was given to 89% of pts. Results: Absolute FLC levels were summed into a sFLC(κ+λ) variable and …