LONG CHAIN ANTIGEN CONTAINING INTEREPITOPE SEQUENCE THAT PROMOTES ANTIGEN PRESENTATION TO T CELLS
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United States of America
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Issued Date -
Mar 3, 2022
app pub date -
Nov 18, 2021
filing date -
Nov 18, 2021
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Abstract
A long-chain peptide antigen includes a plurality of epitopes. An interepitope sequence located between two of the plurality of epitopes contains four to ten consecutive tyrosines, threonines, alanines, histidines, glutamines, or asparagines. The killer T-cell recognition epitopes form complexes with MHC class I molecules and are recognized by CD8+ killer T-cells when the complexes are presented on the surfaces of antigen-presenting cells. The helper T-cell recognition epitopes form complexes with MHC class II molecules and are recognized by CD4+ helper T-cells when the complexes are presented on the surfaces of antigen-presenting cells. The peptide is cleaved within the first interepitope sequence upon uptake of the peptide into antigen-presenting cells. The long-chain peptide antigen may be administered to a patient together with a hydrophobized polysaccharide, such as cholesterol-modified pullulan, and/or an adjuvant, such as CpG oligo DNA.
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