IL-16 antagonists
In accordance with the present invention, novel IL-16 antagonists, preferably peptides derived from CD4, have been isolated and synthesized. These peptides possess IL-16 antagonistic properties including the ability to selectively bind to IL-16 and inhibit IL-16-mediated biological activity. The peptides comprise specific portions of the native human CD4 receptor and variations thereof and therefore are non-immunogenic when administered to humans. The present invention also provides compositions containing at least one IL-16 antagonist peptide which can inhibit, suppress or cause the cessation of at least one IL-16-mediated biological activity in mammals, including humans. The present invention provides a method and composition for treating inflammation associated with disease states such as asthma, rheumatoid arthritis, inflammatory bowel disease (IBD) and systemic lupus (SLE) in mammals such as, for example, humans.
1. A method of treating an IL-16 mediated disorder in a subject, comprising administering to the subject a therapeutically effective amount of an IL-16 antagonist peptide and a pharmaceutically acceptable carrier to interfere with or prevent binding to an IL-16 receptor, wherein said IL-16 antagonist peptide consists of a sequence selected from the group consisting of CLLS (SEQ ID NO:2), WOCLLS (SEQ ID NO:4), WOALLS (SEQ ID NO:5), WACLLS (SEQ ID NO:6), and VVOVVA (SEC ID NO:9).
2. The method of claim 1 , wherein said IL-16 mediated disorder is an inflammatory disease selected from the group consisting of asthma, arthritis, inflammatory bowel disease (IBD), Systemic Lupus (SLE), multiple sclerosis (MS), Graves opthalmopathy, atopic rhinitis, atopic dermatitis and bullous pemphigoid.
3. The method of claim 1 , further comprising simultaneously administering an anti-inflammatory agent selected from the group consisting of NSAIDS, steroids, anti-TNFα antibody, anti-CD4 antibodies, and cyclosporin-A.