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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A novel cell-penetrating peptide derived from WT1 enhances p53 activity, induces cell senescence and displays antimelanoma activity in xeno- and syngeneic systems

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Massaoka, Mariana H. [1] ; Matsuo, Alisson L. [1] ; Figueiredo, Carlos R. [1] ; Girola, Natalia [1] ; Faria, Camyla F. [1] ; Azevedo, Ricardo A. [1] ; Travassos, Luiz R. [1]
Total Authors: 7
[1] Univ Fed Sao Paulo, UNIFESP, Expt Oncol Unit UNONEX, Dept Microbiol Immunol & Parasitol, BR-04023062 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: FEBS OPEN BIO; v. 4, p. 153-161, 2014.
Web of Science Citations: 10

The Wilms tumor protein 1 (WT1) transcription factor has been associated in malignant melanoma with cell survival and metastasis, thus emerging as a candidate for targeted therapy. A lysine-arginine rich peptide, WT1-pTj, derived from the ZF domain of WT1 was evaluated as an antitumor agent against A2058 human melanoma cells and B16F10-Nex2 syngeneic murine melanoma. Peptide WT1-pTj quickly penetrated human melanoma cells and induced senescence, recognized by increased SA-beta-galactosidase activity, enhanced transcriptional activity of p53, and induction of the cell cycle inhibitors p21 and p27. Moreover, the peptide bound to p53 and competed with WT1 protein for binding to p53. WT1-pTj treatment led to sustained cell growth suppression, abrogation of clonogenicity and G2/M cell cycle arrest. Notably, in vivo studies showed that WT1-pTj inhibited both the metastases and subcutaneous growth of murine melanoma in syngeneic mice, and prolonged the survival of nude mice challenged with human melanoma cells. The 27-amino acid cell-penetrating WT1-derived peptide, depends on C-3 and H-16 for effective antimelanoma activity, inhibits proliferation of WT1-expressing human tumor cell lines, and may have an effective role in the treatment of WT1-expressing malignancies. (C) 2014 The Authors. Published by Elsevier B.V. on behalf of Federation of European Biochemical Societies. All rights reserved. (AU)

FAPESP's process: 12/19476-2 - A novel antitumor WT1-derived peptide: anti-melanoma activity and mechanisms of action
Grantee:Mariana Hiromi de Souza Massaoka
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 10/51423-0 - Bioactive peptides and peptidases: biological and immunobiological activities in infectious diseases and cancer
Grantee:Luiz Rodolpho Raja Gabaglia Travassos
Support Opportunities: Research Projects - Thematic Grants