Secretory Component is Bound to the Paraproteins in Sera of IgA and IgM Gammopathies
作者:
J.‐P. BOUVET,
H. HOCINI,
S. ISCAKI,
期刊:
Scandinavian Journal of Immunology
(WILEY Available online 1992)
卷期:
Volume 35,
issue 1
页码: 79-83
ISSN:0300-9475
年代: 1992
DOI:10.1111/j.1365-3083.1992.tb02836.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Secretory immunoglobulins A (SIgM) and M (SIgM)were investigated in 20 sera containing high levels of monoclonal polymeric IgM or IgA. In the sera of patients suffering from Waldenström's macroglobulinemia (WM), the level of SIgA was found to be low, whereas that of SIgM was extremely high. Reciprocally, in the multiple myeloma (MM) patients, SIgA were increased and SIgM were dramatically decreased. Electrophoretic analysis showed these SIgA and SIgM to have the same monoclonal pattern as the corresponding paraprotein. Hence these molecules must originate from the malignant clone. The most likely mechanism involved is an intravascular formation of the secrelory‐like immunoglobulins. Free secretory component (SC) could diffuse passively from the digestive lumen and bind the circulating myeloma polymeric immunoglobulins. Such a possibility of in vivo binding of free SC to IgM and IgA polymers leads to a reconsideration of the secretory origin of SIgM and SIgA in normal human ser
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