Related Experiment Video
Updated: Jun 26, 2026

Induction of Invasive Transitional Cell Bladder Carcinoma in Immune Intact Human MUC1 Transgenic Mice: A Model for Immunotherapy Development
Published on: October 30, 2013
A WT1 protein-derived, naturally processed 16-mer peptide, WT1(332), is a promiscuous helper peptide for induction of
Fumihiro Fujiki1, Yoshihiro Oka, Mai Kawakatsu
1Department of Functional Diagnostic Science, Osaka University Graduate School of Medicine, Suita City, Osaka, Japan.
Abstract:
The Wilms' tumor gene WT1 is overexpressed in various tumors, and the WT1 protein has been demonstrated to be an attractive target antigen for cancer immunotherapy. A WT1 protein-derived 16-mer peptide, WT1(332) (KRYFKLSHLQMHSRKH), which was naturally generated through processing in cells and could elicit Th1-type CD4(+) helper T cell responses with an HLA-DRB1*0405-restriction has previously been identified by us. In the present study, it has been demonstrated that WT1(332) can induce WT1(332)-specific CD4(+) T cell responses with the restriction of not only HLA-DRB1*0405 but also HLA-DRB1*1501, -DRB1*1502, or -DPB1*0901. These HLA class II-restricted WT1(332)-specific CD4(+) T cell lines produced IFN-gamma but neither IL-4 nor IL-10 with WT1(332) stimulation, thus showing a Th1-type cytokine profile. Furthermore, HLA-DRB1*1501 or -DRB1*1502-restricted WT1(332)-specific CD4(+) T cell lines responded to WT1-expressing transformed cells in an HLA-DRB1-restricted manner, which is consistent with our previous finding that WT1(332) is a naturally processed peptide. These results indicate that the natural peptide, WT1(332), is a promiscuous WT1-specific helper epitope. WT1(332) is expected to apply to cancer patients with various types of HLA class II as a WT1-specific helper peptide in combination with HLA class I-restricted WT1 peptides.
Related Concept Videos
Canonical Wnt Signaling Pathway
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Non-Canonical Wnt Signaling Pathways
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...

