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. 1983 Jun;80(12):3762–3766. doi: 10.1073/pnas.80.12.3762

Human immunoglobulin allotypes: previously unrecognized determinants and alleles defined with monoclonal antibodies.

D Zelaschi, C Newby, M Parsons, B van West, L L Cavalli-Sforza, L A Herzenberg, L A Herzenberg
PMCID: PMC394131  PMID: 6190180

Abstract

The highly polymorphic system of serologically defined genetic markers on human IgG heavy chains (Gm allotypes) is second only to the HLA complex in terms of the large number of determinants, alleles, and haplotypes that can be used for analyses of disease associations and other genetic studies. However, present typing methods are based on the use of anti-Gm antisera that are derived mainly from fortuitously immunized human donors, often requiring processing before use, and must be used in a hemagglutination-inhibition assay that cannot be used in typing for isoallotypic determinants (currently termed "non-markers"). In studies presented here, we describe an allotyping system that utilizes monoclonal antibodies in a "sandwich" modification of the solid-phase radioimmunoassay, which is capable of reliable quantitative typing of allotypic, isoallotypic, and isotypic immunoglobulin determinants. We show that these highly reproducible, easily disseminated, and essentially inexhaustible reagents can be used for rapid, sensitive, and quantitative Gm typing. Using this system we define two previously unrecognized Gm determinants, one of which, found to date only in Caucasians, is different from all known Gm markers and thus defines previously unrecognized alleles and haplotypes. The other determinant co-segregates with the conventional G3m(b1) marker but is distinct from that marker on serological grounds. The successful preparation of mouse monoclonal antibodies that detect human Gm allotypic differences and the development of an assay system capable of typing isoallotypic as well as allotypic determinants opens the way to further dissection and application of this rich genetic system.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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