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Research Article Free access | 10.1172/JCI105878

Human monoclonal γG-cryoglobulins with anti—γ-globulin activity

Howard M. Grey, Peter F. Kohler, William D. Terry, and Edward C. Franklin

Department of Experimental Pathology, Division of Allergy, Immunology and Rheumatology, Scripps Clinic and Research Foundation, La Jolla, California 92037

Immunology Branch of the National Cancer Institute, Bethesda, Maryland, 20014

Department of Medicine, New York University, School of Medicine, New York 10016

Find articles by Grey, H. in: PubMed | Google Scholar

Department of Experimental Pathology, Division of Allergy, Immunology and Rheumatology, Scripps Clinic and Research Foundation, La Jolla, California 92037

Immunology Branch of the National Cancer Institute, Bethesda, Maryland, 20014

Department of Medicine, New York University, School of Medicine, New York 10016

Find articles by Kohler, P. in: PubMed | Google Scholar

Department of Experimental Pathology, Division of Allergy, Immunology and Rheumatology, Scripps Clinic and Research Foundation, La Jolla, California 92037

Immunology Branch of the National Cancer Institute, Bethesda, Maryland, 20014

Department of Medicine, New York University, School of Medicine, New York 10016

Find articles by Terry, W. in: PubMed | Google Scholar

Department of Experimental Pathology, Division of Allergy, Immunology and Rheumatology, Scripps Clinic and Research Foundation, La Jolla, California 92037

Immunology Branch of the National Cancer Institute, Bethesda, Maryland, 20014

Department of Medicine, New York University, School of Medicine, New York 10016

Find articles by Franklin, E. in: PubMed | Google Scholar

Published August 1, 1968 - More info

Published in Volume 47, Issue 8 on August 1, 1968
J Clin Invest. 1968;47(8):1875–1884. https://doi.org/10.1172/JCI105878.
© 1968 The American Society for Clinical Investigation
Published August 1, 1968 - Version history
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Abstract

Seven human γG-myeloma proteins which were also cryoglobulins were studied with respect to their reactivity with γG-globulins as well as with regard to their antigenic classification within the γG—heavy chain subclasses. Five of the seven cryoglobulins studied were positive in at least two of the three tests used to assay for anti—γ-globulin activity. One protein was only weakly positive in one test system and another was negative in all test systems. The structures which were recognized by the cryoglobulins were localized to the Fc-fragment. Only primate γG-globulins contained these antigenic determinants and in some cases the cryoglobulin appeared to show specificity for one human heavy chain subclass over the others. Antigenic analysis revealed that four of the five cryoglobulins with definite antibody activity belonged to the γG3-subclass, the fifth belonged to the γG1-subclass. The two cryoglobulins which reacted only weakly or failed to combine with γG-globulins were both of the γG1-subclass. These findings taken together with the localization of the combining site to the Fab-fragment suggests that many of these cryoglobulins may represent antibodies to γG-globulin, and that the cryoprecipitate in these cases represents antigen-antibody complexes of such a nature that they precipitate only in the cold.

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