L.E.A.P.S. (Ligand Epitope Antigen Presentation System) is a patented, T-cell modulation, peptide epitope delivery technology that enables CEL-SCI to design and synthesize proprietary peptide immunogens. LEAPS compounds consist of a small T-cell binding peptide ligand linked with a disease-associated peptide antigen.
This technology has been shown in several animal models to preferentially direct immune response to a cellular (e.g. T-cell), humoral (antibody) or mixed pathway. Diseases for which antigenic epitope sequences have been identified, such as: some infectious diseases, cancer, autoimmune diseases, allergic asthma and allergy, and select CNS diseases (e.g., Alzheimer’s) are potential candidates for development using this technology platform.


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L.E.A.P.S. (Ligand Epitope Antigen Presentation System) is a CEL-SCI patented platform technology designed to stimulate antigen-specific immune responses in T-cells using synthetic peptides. LEAPS constructs physically link the antigenic peptide with a T-cell binding ligand and are delivered directly to the recipient immune system by injection or mucosal absorption, potentially enhancing T-cell responses to a particular antigen.

Administered as a vaccine, LEAPS combines T-cell binding ligands with small, disease-associated, peptide antigens and may provide a new method to treat and prevent certain diseases. The ability to generate a specific immune response is important because many diseases are often not combated effectively due to the body’s selection of the “inappropriate” immune response. The capability to specifically reprogram an immune response may offer a more effective approach than existing vaccines and drugs in attacking an underlying disease.


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