Abstract
Human IgA occurs in two subclasses, IgA1 and IgA2, distinguished by antigenic, biochemical and biological properties (Mestecky & Russell 1986). The two subclasses are distributed in serum and external secretions, approximately 75% of serum IgA belongs to the IgA1 subclass, occurs predominantly in monomeric form, and originates from bone marrow. In contrast up to 60% of the IgA in external secretions belongs to the IgA2 subclass, is produced locally in secretory glands and tissues and is predominantly in polymeric form. The proportion of the polymeric and monomeric form of IgA is significantly increased in patients with cirrhosis (Kutteh et al., 1982; Newkirk et al., 1983; Kalsi, Delacroix & Hodgson, 1983). These observations suggest that the liver plays a role in the maintenance of normal levels of secretory and serum IgA. Human bile contains high levels of polymeric IgA,but the origin of this IgA is not clear. In this study we have compared the concentration of IgA antibody and its subclasses in 22 matched samples of human portal and peripheral venous blood and bile. Antibodies of each isotype to two oral bacteria were compared with those to two non-oral bacteria. In addition, the specific activity of antibodies in each fluid was calculated to determine if evidence for local production in bile could be found.
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References
Challacombe, S. J., Greenall C. & Stoker T.A.M. (1987) A comparison of IgA in portal and peripheral venous blood. Immunology, 60, 111
Czerkinsky C., Rees A.S., Bergmeier L.A. and Challacombe S. J.(1983)The detection and specificity of class specific antibodies to whole bacterial cells using a solid phase radioimmunoassay. Clin Exp Immunol 53, 192
Delacroix D. L. & Vaerman J. P. (1983) Function of the human liver in IgA homeostasis in plasma. Ann. NY Acad. Sci. 409, 383.
Kutteh W. H., Prince S. J.,Philips J.O., Spenny J. G. & Mestecky J. (1982) Properties of immunoglobulin A in serum of individuals with liver diseases and in hepatic bile. Gastroenterology, 82, 184.
Mestecky J., Russell M. W., Jackson S. & Brown T. A. (1986) The human IgA system: A reassessment Clin. Immunol. Immunopathol 40, 105.
Newkirk M. M., Klein M. H., Katz A., Fisher M. M. & Underdown B. J. (1983) Estimation of polymeric IgA in human serum: an assay based on binding of radiolabeled human secretory component with applications in the study of IgA nephropathy, IgA monoclonal gammopathy and liver disease. J. Immunol. 130, 1176
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© 1990 Kluwer Academic Publishers
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Challacombe, S.J., Rahman, D., Biggerstaff, M., Stoker, T.A. (1990). IgA subclass antibodies to Streptococcus mutans, Escherichia coli, Veillonella parvula and Clostridia perfringens in human peripheral blood, portal venous blood and bile. Evidence for local antibody production in bile. In: MacDonald, T.T., Challacombe, S.J., Bland, P.W., Stokes, C.R., Heatley, R.V., Mowat, A.M. (eds) Advances in Mucosal Immunology. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1848-1_176
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DOI: https://doi.org/10.1007/978-94-009-1848-1_176
Publisher Name: Springer, Dordrecht
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