Iqgap3 epitope peptides and vaccines containing the same

C - Chemistry – Metallurgy – 07 – K

Patent

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C07K 4/12 (2006.01) A61K 39/00 (2006.01) A61P 35/00 (2006.01) C07K 7/06 (2006.01) C07K 14/74 (2006.01) C12N 15/09 (2006.01)

Patent

CA 2727485

Peptide vaccines against cancer are described herein. In particular, the present invention describes epitope peptides derived from IQGAP3 that elicit CTLs. The present invention also provides established CTLs that specifically recognize HLA-A24 or HLA-A02 positive target cells pulsed with the peptides. Antigen-presenting cells and exosomes that present any of the peptides, as well as methods for inducing antigen-presenting cells are also provided. The present invention further provides pharmaceutical agents containing the IQGAP3 polypeptides or polynucleotides encoding thereof, as well as exosomes and antigen-presenting cells as active ingredients. Furthermore, the present invention provides methods for treating and/or prophylaxis of (i.e., preventing) cancers (tumors), and/or prevention of postoperative recurrence thereof, as well as methods for inducing CTLs, methods for inducing anti-tumor immunity, using the IQGAP3 polypeptides, polynucleotides encoding the polypeptides, exosomes or antigen-presenting cells presenting the polypeptides, or the pharmaceutical agents of the present invention. The cancers to be targeted include, but are not limited to, renal, esophageal, gastric, lung, breast, bladder and pancreatic cancer.

La présente invention concerne des vaccins peptidiques contre le cancer. En particulier, la présente invention concerne des peptides épitopes dérivés de IQGAP3 qui élicitent les cellules T cytotoxiques (CTL). La présente invention concerne également des CTL établis qui reconnaissent spécifiquement les cellules cibles HLA-A24 ou HLA-A02 positives pulsées avec les peptides. Linvention concerne également des cellules présentant lantigène et des exosomes qui présentent lun quelconque des peptides, ainsi que des méthodes dinduction de cellules présentant lantigène. La présente invention concerne en outre des agents pharmaceutiques contenant les polypeptides dérivés dIQGAP3 ou des polynucléotides codant pour ceux-ci, ainsi que des exosomes et des cellules présentant lantigène servant de principes actifs. En outre, la présente invention concerne des procédés permettant le traitement et/ou la prophylaxie (cest-à-dire., la prévention) de cancers (tumeurs), et/ou la prévention de la récidive postopératoire de ceux-ci, ainsi que des méthodes permettant dinduire les CTL, des méthodes permettant dinduire une immunité anti-tumeur, en utilisant les polypeptides dérivés de IQGAP3, des polynucléotides codant pour les polypeptides, des exosomes ou des cellules présentant lantigène présentant les polypeptides, ou les agents pharmaceutiques de la présente invention. Les cancers à cibler comprennent entre autres le cancer du rein, de lsophage, de lestomac, du poumon, du sein, de la vessie et du pancréas.

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