Agents for treating human illnesses based on .beta.-catenin,...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/47 (2006.01) A61K 38/17 (2006.01) C07K 19/00 (2006.01) G01N 33/00 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2357015

.beta.-catenin is a central molecule of the Wnt signal path. Increasing .beta.- catenin in the cell leads to the translocation in the cell nucleus and to the interaction with transcription factors of the LEF-1/TCF family. This can lead to colonic cancers and melenomas (oncogenic signal path). However, .beta.- catenin also interacts with the tumor-suppressor genes APC, conductin and E- cadherin which have a contrary effect on the cell (anti-oncogenic effect). The invention relates to peptides derived from LEF-1-/TCF-4-transcription factors and analogous molecules in the treatment of tumors, especially for treating colonic cancers and melanomas. These peptides and analogous molecules influence the interaction between .beta.-catenin and LEF-1/TCF. The invention can be used in the fields of pharmaceuticals and medicine. The invention essentially relates to peptides, said peptides comprising the parts of the LEF- 1/TCF-4-transcription factors, and to the variants and mutations thereof. The peptides are preferably comprised of 10-40 amino acids from the N-terminal area of LEF-1 or TCF-4. The invention also relates to peptides or analogous molecules derived from the armadillo region of .beta.-catenin which were identified as interaction domains with LEF-1/TCF, APC, conductin and E- cadherin. These peptides or analogous molecules can likewise inhibit the interaction between .beta.-catenin and LEF-1/TCF, or in the case of APC or conductin, can increase the concentration of .beta.-catenin in the cell. These last molecules can be used in order to influence the formation of tissue and organs, for example, in order to promote hair growth.

LA .beta.-catenine est une molécule centrale du chemin de signal Wnt. L'augmentation de la .beta.-catenine dans la cellule entraîne la translocation dans le noyau de la cellule et l'interaction avec des facteurs de transcription de la famille LEF-1/TCF. Cela peut provoquer un cancer du colon et des mélanomes (chemin de signal oncogène). Mais la .beta.-catenine interagit aussi avec les gènes suppresseurs de tumeurs APC, la conductine et la E-cadherine qui ont une action contraire sur la cellule (action anti-oncogène). L'invention concerne des peptides dérivés des facteurs de transcription du LEF-1-/TCF-4- et des molécules analogues dans le traitement de la tumeur, notamment pour le traitement de cancers du colon et de mélanomes. Ces peptides et molécules analogues influencent l'interaction entre la .beta.-catenine et le LEF-1/TCF. Le domaine d'application de l'invention est l'industrie pharmaceutique et la médecine. L'invention concerne essentiellement les peptides, qui englobent des fractions des facteurs de transcription le LEF-1-/TCF-4-, et leurs variantes et mutants. Ils sont constitués, de préférence, de 10 à 40 acides aminés de la zone terminale N du LEFT-1 ou TCF-4. L'invention concerne également des peptides ou molécules analogues dérivés de la région armadillo de la .beta.-catenine et identifiés comme domaines d'interaction avec le LEF-1/TCF, les APC, la conductine et la E-cadherine. Ces peptides ou molécules analogues peuvent également inhiber l'interaction entre la .beta.-catenine et le LEF-1/TCF, ou augmenter la concentration de la .beta.-catenine dans la cellule comme dans le cas des APC ou de la conductine. Ces dernières molécules peuvent être utilisées pour agir sur la formation des tissus et des organes, par exemple, pour favoriser la pousse des cheveux.

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