Abstract: Vaccine composition containing a mutant of the human Interleukin-15 (IL-15). The use of said mutant polypeptide of human IL-15 to manufacture a medicament for the active immunotherapy of diseases associated with IL-15 overexpression, including some autoimmune diseases and hematological malignancies. Administration to an individual that needs it of a therapeutically effective amount of the vaccine, that comprises the mutant polypeptide of the human IL-15 of the invention, constitutes a method for the therapy of IL-15 over-expressing related diseases.

Abstract: Vaccine composition containing a mutant of the human Interleukin-15 (IL-15). The use of said mutant polypeptide of human IL-15 to manufacture a medicament for the active immunotherapy of diseases associated with IL-15 overexpression, including some autoimmune diseases and hematological malignancies. Administration to an individual that needs it of a therapeutically effective amount of the vaccine, that comprises the mutant polypeptide of the human IL-15 of the invention, constitutes a method for the therapy of IL-15 over-expressing related diseases.

Abstract: The present invention is related to the field of molecular immunology, particularly to a peptide derived from the sequence of interleukine-15 (IL-15), wherein said peptide was optimized to inhibit the biological activity of this molecule. In the present invention, it is shown that this peptide inhibits IL-15-induced T cell proliferation, Tumor Necrosis Factor ? (TNF?) induction and the expression of IL-8 and IL-6 by the IL-15 receptor ? subunit (IL-15R?), all these effects mediated by the binding of the peptide to the IL-15R?. The invention is also related to the use of the peptide to treat pathologies where the abnormal expression of IL-15 or IL-15R? is related to the course of the disease, such as rheumatoid arthritis (RA) and prostate cancer.

Abstract: The present invention is related to the field of molecular immunology, particularly to a peptide derived from the sequence of interleukine-15 (IL-15), wherein said peptide was optimized to inhibit the biological activity of this molecule. In the present invention, it is shown that this peptide inhibits IL-15-induced T cell proliferation, Tumor Necrosis Factor ? (TNF?) induction and the expression of IL-8 and IL-6 by the IL-15 receptor a subunit (IL-15R?), all these effects mediated by the binding of the peptide to the IL-15R?. The invention is also related to the use of the peptide to treat pathologies where the abnormal expression of IL-15 or IL-15R? is related to the course of the disease, such as rheumatoid arthritis (RA) and prostate cancer.