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Updated: Aug 11, 2026
Generation of Recombinant Human IgG Monoclonal Antibodies from Immortalized Sorted B Cells
Published on: June 5, 2015
A data base for 3000 monoclonal immunoglobulin cases and a new classification
1Service de Biochimie et de Biologie moléculaire, Hôpital Lariboisière, 2 rue A Paré, F-75475 Paris, France. francoise.pontet@free.fr
Insights
This study analyzed 3094 monoclonal immunoglobulin cases over 40 years, finding over half were not malignant hemopathies. The classification system effectively categorized various conditions, including multiple myeloma (MM) and Waldenstrom macroglobulinemia (WM).
Area of Science:
- Immunology
- Hematology
- Clinical Pathology
Background:
- Monoclonal immunoglobulins are crucial biomarkers in various hematologic and non-hematologic conditions.
- Long-term laboratory data provides valuable insights into disease patterns and classification efficacy.
Purpose of the Study:
- To analyze a 40-year dataset of monoclonal immunoglobulin cases.
- To evaluate an original classification system for these cases.
- To characterize the distribution of malignant and benign conditions.
Main Methods:
- Retrospective analysis of 3094 monoclonal immunoglobulin cases.
- Classification based on immunoelectrophoresis, immunofixation, and clinical data.
- Categorization into multiple myeloma (MM), Waldenstrom macroglobulinemia (WM), other lymphoproliferative diseases, associated conditions, and benign cases.
Main Results:
- Over 50% of diagnosed cases (1335) were not malignant hemopathies.
- Free light chain (FLC) and polyclonal immunoglobulin (Ig) cases comprised 7% and 6% of the cohort, respectively.
- Demographic analysis revealed distinct male/female ratios across different case categories.
Conclusions:
- The established classification system is beneficial for categorizing diverse monoclonal immunoglobulin-related conditions.
- The cohort data highlights the significant proportion of non-malignant diagnoses.
- Further research is warranted on FLC, polyclonal Ig, and malignant transformation.
Abstract:
Data from monoclonal immunoglobulin cases screened in our laboratory for 40 years were used to assemble a cohort of 3094 cases selected according to immunoelectrophoresis and immunofixation interpretation and clinical data availability. Molecular distribution and original classification were used to establish five categories of cases: multiple myeloma (MM) and Waldenstrom macroglobulinemia (WM), other lymphoproliferative diseases, cases associated with heavy immunological diseases or other tumors, and benign cases. Free light chain (FLC) cases comprise 7% of the cohort, pluriclonal Ig, 6%. More than 50% of 1335 cases with identified diagnoses are not malignant hemopathies. Male/female ratio is less than 1 for MM cases and close to 1 for benign and other lymphoproliferative cases. Males are a majority in MW and associated cases. Follow-up periods range from 5 to 30 years for 263 cases. The main characteristics of this data base have been defined and the benefit of the original classification is highlighted. Future studies will investigate improvements resulting from immunofixation and current urinary analysis practices, as well as long-term follow-up, pluriclonal Ig cases, cryoglobulins, the meaning of the presence of FLC and malignant transformation.
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