Antibodies that bind ALS specific epitopes and methods of making
The invention relates to an epitope protection assay for use in diagnosis, prognosis and therapeutic intervention in diseases, for example, involving polypeptide aggregation, such as prion infections. The methods of the invention first block accessible polypeptide target epitope with a blocking agent. After denaturation of the polypeptide, a detecting agent is used to detect protein with target epitope that was inaccessible during contact with the blocking agent. The invention also relates to novel amyotrophic lateral sclerosis-specific epitopes and their uses to make antibodies, and to the novel antibodies and uses thereof.
1. An isolated antibody specific for an ALS-specific epitope, wherein the antibody specifically binds:
DLGKGGNEESTKTGNAGS (SEQ ID NO:1); and/or
NPLSRKHGGPKDEE (SEQ ID NO:2).
2. The isolated antibody according to claim 1 , wherein the antibody is monoclonal, polyclonal, chimeric or humanized.
3. The isolated antibody according to claim 1 , wherein the antibody is an antibody fragment.
4. The isolated antibody according to claim 3 , wherein the antibody fragment is a Fab, Fab′, F(ab′) 2 , scFv, dsFv, ds-scFv, dimers, minibodies, diabodies, or multimers thereof or bispecific antibody fragments.
5. A method of making an antibody according to claim 1 wherein the antibody is specific for DLGKGGNEESTKTGNAGS (SEQ ID NO:1), comprising immunizing an animal with an immunogenic form of the isolated peptide.
6. A method of making an antibody according to claim 1 wherein the antibody is specific for the isolated peptide comprising the sequence NPLSRKHGGPKDEE (SEQ ID NO:2), by immunizing an animal with an immunogenic form of the isolated peptide.
7. A diagnostic agent comprising (1) an antibody of claim 1 attached to (2) a label that produces a detectable signal, directly or indirectly.