The long term aims of the parent grant (Al 31268) are: a) To determine the generality of antibody-mediated catalysis; b) To define the role of antibody catalysis in autoimmunity and immunological defence; c) To identify natural antigens capable of eliciting catalytic antibody formation; d) To determine the structural features of antibodies underlying their binding and hydrolytic activities; and, e) To isolate catalytic antibodies with potential therapeutic or investigative utility by screening of the immune repertoire.
The specific aims of this FIRCA collaborative proposal are: l. To investigate (i) the frequency of hydrolytic anti-DNA antibodies and anti- VIP antibodies in patients with systemic lupus erythematosus (SLE) and asthma, respectively, and control healthy subjects and (ii) the kinetics and specificity of antibody catalyzed VIP and DNA hydrolysis; 2. To determine the contribution of antibody subunits in DNA hydrolysis and binding; and 3. To clone and express the cDNA for hydrolyzing antibodies using phage display library techniques. The experimental design is: a) Antibody purification from blood of healthy individuals, asthma patients and SLE patients; b) Preparation of radioactive DNA and VIP probes; c) Radioassay of DNA binding and hydrolysis by antibodies; d) Comparison of these activities in healthy and disease groups; e) Characterization of antibody kinetic properties and specificity using denatured DNA, native DNA and short oligonucleotides of defined length and sequence; f) Purification of antibody Fab fragments and light chains; g) Comparison of the Km, turnover number and specificity of intact antibodies and isolated antibody subunits; h) Cloning and expression of recombinant single chain Fab by selection from phage display libraries.

Agency
National Institute of Health (NIH)
Institute
Fogarty International Center (FIC)
Type
Small Research Grants (R03)
Project #
2R03TW000287-02
Application #
2291766
Study Section
Special Emphasis Panel (SRC (01))
Project Start
1994-09-30
Project End
1996-09-29
Budget Start
1994-09-30
Budget End
1995-09-29
Support Year
2
Fiscal Year
1994
Total Cost
Indirect Cost
Name
University of Nebraska Medical Center
Department
Anesthesiology
Type
Schools of Medicine
DUNS #
City
Omaha
State
NE
Country
United States
Zip Code
68198
Demin, A V; Kolesnikov, A V; Olfer'ev, M A et al. (1998) [Expression of the catalytically active light chain of the antibody against vasoactive intestinal peptide] Dokl Akad Nauk 360:547-9
Gabibov, A G; Makarevitch, O (1995) DNA hydrolysis by antibodies. Methods Mol Biol 51:223-35
Schourov, D V; Gololobov, G V; Makarevich, O I et al. (1995) DNA-hydrolyzing autoantibodies in autoimmune pathologies. Ann N Y Acad Sci 750:255-64
Gololobov, G V; Chernova, E A; Schourov, D V et al. (1995) Cleavage of supercoiled plasmid DNA by autoantibody Fab fragment: application of the flow linear dichroism technique. Proc Natl Acad Sci U S A 92:254-7
Gabibov, A G; Gololobov, G V; Makarevich, O I et al. (1994) DNA-hydrolyzing autoantibodies. Appl Biochem Biotechnol 47:293-302;discussion 303