We have identified three cross reactive idiotypes on anti-double stranded DNA antibodies in systemic lupus erythematosus in man. The 3I kappa light chain idiotype is encoded by the Vk1 gene family; the F4 heavy chain idiotype by the VH3 or VH4 gene family and the 8.12 lambda light chain idiotype by the V2 gene family. Having identified the V gene families associated with the cross reactive idiotypes, we now propose to determine if particular members of these V region families encode anti-DNA antibodies and if there are polymorphisms of these V region genes that predispose to SLE. We will study multiple antibodies produced by clonally related B cell lines, B cell genealogies, to identify structural determinants of DNA binding and assess the role of antigen, and DNA in particular in the anti- DNA response. We will determine the relationship of idiotypic anti-DNA antibodies to anti-pneumococcal polysaccharide antibodies bearing the 3I or 8.12 cross-reactive idiotype. Finally, we will initiate studies aimed at defining the structural correlates of pathogenicity of anti-DNA antibodies and at identifying the T cells that participate in the anti-DNA response in SLE.

Agency
National Institute of Health (NIH)
Institute
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Type
Research Project (R01)
Project #
2R01AR032371-09
Application #
3156266
Study Section
Immunological Sciences Study Section (IMS)
Project Start
1983-04-01
Project End
1996-03-31
Budget Start
1991-04-30
Budget End
1992-03-31
Support Year
9
Fiscal Year
1991
Total Cost
Indirect Cost
Name
Albert Einstein College of Medicine
Department
Type
Schools of Medicine
DUNS #
009095365
City
Bronx
State
NY
Country
United States
Zip Code
10461
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