International Institute of Cancer Immunology, Inc.

Haruo Sugiyama

Otsuka Pharmaceutical Company, Limited

International Institute of Immunology, Inc.

Yusuke Oji

Hideaki Tanaka

Kiyonori Katsuragi

Yoshihiro Goto

Yasukazu Ohmoto

Shinji Sogo

Husako Iwata

Provided is a method for predicting a clinical effect on a subject in a WT1 peptide immunotherapy, said method comprising: a) a step for contacting a sample derived from the subject with WT1 antigen peptide or a variant thereof; and b) a step for detecting the binding of the sample to the WT1 antigen peptide or a variant thereof and thus measuring anti-WT1 antigen peptide IgG antibody titer existing in the sample, characterized in that an increase in the anti-WT1 antigen peptide IgG antibody titer in the subject determines the achievement of a favorable clinical effect. Also provided is a kit for performing the method according to the present invention, said kit containing WT1 antigen peptide or a variant thereof.

Method for predicting clinical effect of immunotherapy

The present invention provides a method for detecting cancer using a protein expressed in various cancers, and a pharmaceutical composition for the treatment or prevention of such cancer using the protein as an indicator. Furthermore, the present invention provides a pharmaceutical composition containing a cancer antigen peptide derived from the protein. More particularly, the method comprises the step of determining the presence or amount of an eEF2 polypeptide or an eEF2 antibody in a sample obtained from a subject.

Cancer antigen EEF2

Cancer antigen eEF2

Provided is an invention relating to a method for measuring an anti-WT1 antibody in a sample allowing measurement and evaluation of the anti-WT1 antibody with higher accuracy and to use of the method. The method for measuring an anti-WT1 antibody in a sample includes using a polypeptide having antigenicity to the anti-WT1 antibody selected from a polypeptide comprising the amino acid sequence of positions 294-449 in SEQ ID NO: 1, a partial polypeptide of the polypeptide, and a polypeptide including an amino acid sequence having deletion, substitution, or addition of one to several amino acids in the amino acid sequence constituting each of these polypeptides and/or a polypeptide having antigenicity to the anti-WT1 antibody selected from a polypeptide comprising the amino acid sequence of positions 181-324 in SEQ ID NO: 1, a partial polypeptide of the polypeptide, and a polypeptide including an amino acid sequence having deletion, substitution, or addition of one to several amino acids in the amino acid sequence constituting each of these polypeptides.

Method for measuring anti-WT1 antibody

The present inventors discovered that siRNAs targeting the 17AA site of the WT1 gene not only suppress the expression of the WT1 gene, but also demonstrate remarkable cell growth-suppressing effects and cell death-inducing effects in cancer cell lines.

siRNA that inhibits WT1 gene expression and uses thereof

siRNA hat inhibits WT1 gene expression and uses thereof

Disclosed is a polynucleotide having at least 15 contiguous bases in the base sequence of SEQ ID NO:26 and including the base sequence of SEQ ID NO:27. Also disclosed is siRNA produced based on the polynucleotide. By means of this, a cancer cell-specific molecular-targeted therapy, which successfully controls the function of WT1, can be realized.

Growing community of inventors

Osaka, Japan

Yusuke Oji