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Monoclonal gammopathies in children
E Gerritsen1, J Vossen, M van Tol
1Department of Pediatrics, University Hospital Leiden, The Netherlands.
Journal of Clinical Immunology
|July 1, 1989
Summary
Monoclonal gammopathies, abnormal immunoglobulin proteins, were found in 3.9% of pediatric patients, often transiently. These immunoglobulin abnormalities were linked to immunodeficiency, cancer, and autoimmune diseases in children.
Area of Science:
- Pediatric Immunology
- Clinical Chemistry
Background:
- Monoclonal gammopathies are uncommon in children.
- Understanding their prevalence and characteristics in pediatric populations is crucial for diagnosis and management.
Purpose of the Study:
- To investigate the prevalence and characteristics of monoclonal gammopathies in a large cohort of pediatric patients.
- To identify associated conditions and the transient nature of these immunoglobulin abnormalities.
Main Methods:
- Agar gel electrophoresis and immunoelectrophoresis were performed on sera from 4000 pediatric patients over 10 years.
- Immunoblotting was used to identify immunoglobulin class and light-chain isotypes in 79 patients with monoclonal gammopathies.
Main Results:
- Monoclonal immunoglobulin components were detected in 3.9% (155/4000) of pediatric patients.
- These were most frequent in patients with immunodeficiency diseases, hematological malignancies, autoimmune diseases, and severe aplastic anemia.
- Most identified monoclonal gammopathies were transient, with a notable absence of IgA and a predominance of lambda light-chain isotypes.
Conclusions:
- Monoclonal gammopathies in children are often transient and associated with various underlying conditions.
- The observed pattern suggests a potential role for regulatory T-cell dysfunction in pediatric B-cell proliferations.