The invention provides methods and compositions for early diagnosis and treatment of a disease associated with a specific antibody by employing the detection of a cross-idiotypic epitope on the specific antibody to detect the cells that produce the antibody before the development of clinical symptoms of the disease.

The present disclosure is directed to human monoclonal IgE antibodies, and IgG antibodies engineered therefrom. Such engineered antibodies can be used to blunt pathologic IgE responses in subjects, such as in the treatment or prevention of allergies.

In various embodiments methods are provided for identifying a mammal having an elevated risk for an adverse cardiac event (e.g. an MI) and/or determining the prognosis for the mammal. In certain embodiments the methods comprise determining, or causing to be determined, the presence and/or level of antibodies that bind a malondialdehyde acetaldehyde adduct (MAA adduct) in a biological sample from the mammal, where an elevated level of anti-MAA adduct antibodies, as compared to the level found in a normal healthy mammal is an indicator that that said mammal has one or more atherosclerotic lesions and/or is at elevated risk for a myocardial infarction.

Disclosed are methods of diagnosing and treating a subject with active or inactive eosinophilic esophagitis (EoE). The methods may include the steps of detecting whether a level of one or more immunoglobulin antibodies is elevated in an esophageal secretion sample obtained from a subject, diagnosing the subject with active EoE when the level of one or more immunoglobulin antibodies in the sample is elevated above a pre-determined cut-off value and diagnosing the subject with inactive EoE when the level of one or more immunoglobulin antibodies level in the sample is below a pre-determined cut-off value; and treating the subject diagnosed with active EoE.

The present invention concerns methods for treating progressive multiple sclerosis (MS) in a patient, and an article of manufacture with instructions for such use.

In certain aspects, the disclosure relates to anti-idiotype antibodies and antigen-binding portions thereof that specifically bind a CD9B441 containing protein, e.g., an antibody or antigen-binding portions thereof. In some aspects, the anti-idiotype antibodies and antigen-binding portions of the present disclosure can be used in methods to detect and quantify cells expressing chimeric antigen receptors that include CD9B441.

Compositions, methods, and kits are provided for diagnosing narcolepsy. Susceptibility to type 1 narcolepsy is linked with the human leukocyte antigen (HLA)-DQ6 allele and a single nucleotide polymorphism (SNP) in the T cell receptor gene segment TRAJ24. The presence of T cells reactive with hypocretin (HCRT) autoantigens is also associated with development of narcolepsy. Compositions and methods are provided for detecting autoreactive T cells specific for hypocretin (HCRT) autoantigens presented by HLA-DQ6.

The invention provides a method for the immunological determination of an antibody against a drug antibody in a sample using a double antigen bridging immunoassay comprising a capture drug antibody and a tracer drug antibody, characterized in that the capture drug antibody is a mixture of said drug antibody conjugated to the solid phase at at least two different antibody sites and the tracer drug antibody is a mixture of said drug antibody conjugated to the detectable label at at least two different antibody sites.

The present invention relates to improved methods for detecting immunoglobulin M (IgM), immunoglobulin A (IgA) and immunoglobulin E (IgE) antibodies, and new therapies for diseases and conditions mediated by pathogenic antibodies and antibody complexes.

Methods and reagents for multiplex detection of antibodies are disclosed. In particular, the invention relates to multiplex detection of antibodies using antigen-DNA and antibody-binding agent-DNA conjugates carrying DNA barcodes for identifying and quantitating disease-relevant antibody isotypes, such as those involved in allergic responses, autoimmune diseases, infections, and inflammation.