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Updated: Jun 25, 2026

Screening for Amyloid Aggregation by Semi-Denaturing Detergent-Agarose Gel Electrophoresis
Published on: July 16, 2008
Screening for Systemic Light-Chain Amyloidosis in Patients Over 60 with λ Monoclonal Gammopathies
Ping Zhou1, Mahesh M Mansukhani2, Raymond Yeh2
1The Tufts Medicine Myeloma and Amyloid Program, Tufts Medical Center, 800 Washington Street, P.O. Box 826, Boston, MA 02111, USA.
Early diagnosis of light-chain amyloidosis (AL) is crucial. A study identified AL-related genes and cytogenetic abnormalities in smoldering myeloma (SMM) and monoclonal gammopathy of undetermined significance (MGUS) patients, aiding earlier AL detection.
Area of Science:
- Hematology
- Oncology
- Genetics
Background:
- Early mortality in light-chain amyloidosis (AL) necessitates earlier diagnosis.
- Screening for AL involves identifying specific genetic markers and cytogenetic abnormalities.
Purpose of the Study:
- To screen for AL in individuals over 60 with specific risk factors.
- To identify AL-related IGVL gene usage and cytogenetic abnormalities in smoldering myeloma (SMM) and monoclonal gammopathy of undetermined significance (MGUS).
Main Methods:
- A multicenter study screened subjects with SMM or MGUS, a differential light-chain (dFLC) > 23 mg/L, and no prior AL diagnosis.
- Bone marrow analysis included plasma cell cytogenetics and next-generation sequencing for IGVL genes.
- Subjects with AL-related IGVL genes were further screened for AL using tissue studies.
Main Results:
- 30 subjects were enrolled; 17 had SMM and 13 had MGUS.
- AL was confirmed in 3 SMM patients.
- SMM, AL-related IGVL genes, and specific cytogenetic abnormalities (t(11;14) or gain 1q) were significantly associated with AL diagnosis.
Conclusions:
- The findings support a larger study to develop an AL likelihood algorithm.
- Key predictors for AL include dFLC, IGVL gene usage, and cytogenetic abnormalities.
- Earlier AL detection can be achieved through targeted screening in at-risk populations.
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