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Diagnosis and treatment of cancer using Anti-itm2a antibody

Inactive Publication Date: 2014-07-10
THE UNIV OF TOKYO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a new technology that allows for better identification and tracking of objects or people using a variety of sensors and cameras. This technology can help improve the accuracy and reliability of object and person detection in various applications such as autonomous vehicles, robotics, and security systems. Its technical effects include improved accuracy, reliable detection, and improved efficiency in identifying and tracking objects and people.

Problems solved by technology

Nonetheless, it has not been specifically confirmed so far that T cell leukemia / lymphoma, Ewing's sarcoma, or acute myeloid leukemia can be treated using an anti-ITM2A antibody.

Method used

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  • Diagnosis and treatment of cancer using Anti-itm2a antibody
  • Diagnosis and treatment of cancer using Anti-itm2a antibody
  • Diagnosis and treatment of cancer using Anti-itm2a antibody

Examples

Experimental program
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Effect test

example 1

Expression Analysis of ITM2A mRNA

[0215]The expression of ITM2A mRNA was assayed in clinical Ewing's sarcoma samples, Ewing's sarcoma cell lines, blood cancer cell lines, and normal tissues using Human Exon 1.0 ST Array (Affymetrix, Inc.). The expression analysis employed 1 μg of total RNAs from each sample shown in FIG. 1. The analysis was conducted according to a method described in GeneChip Whole Transcript (WT) Sense Target Labeling Assay Manual (Affymetrix, Inc.). The data was digitized using Exon Array Computational Tool software (Affymetrix, Inc.). The total RNAs of normal tissues used in the analysis were normal tissues-derived total RNAs purchased from Clontech Laboratories, Inc., Ambion, Inc., Stratagene Corp., Cell Applications, Inc., Panomics, Inc., CHEMICON International, Inc., and BioChain Institute, Inc. Total RNAs were prepared from the tumor sites and normal sites of clinical cancer tissues (sampled after informed consent was obtained) and from cancer cell lines usin...

example 2

Preparation of Monoclonal Antibody Against ITM2A

(2-1) Cloning of ITM2A Gene

[0217]cDNAs were prepared using SuperScript III Reverse Transcriptase (Invitrogen Corp.) with total RNAs prepared from a cancer cell line IM9 using Trizol as a template. A nucleotide sequence encoding ITM2A was amplified by PCR using the cDNAs as a template, a forward primer (SEQ ID NO: 43), and a reverse primer (SEQ ID NO: 44). This PCR employed PrimeSTAR GXL DNA Polymerase (Takara Bio Inc.) and was performed by 30 repetitive reaction cycles each involving 98° C. for 10 seconds, 55° C. for 15 seconds, and 68° C. for 1 minute. The amplification products formed from the PCR were cloned into pCR2.1-TOPO vectors (Invitrogen Corp.) to obtain pCR2.1_ITM2A. The inserted sequence of pCR2.1_ITM2A was sequenced to confirm that the inserted sequence was the same as a sequence registered under RefSeq Accession No. NM—004867.4.

(2-2) Preparation of Expression Vector for DNA Immunization

[0218]A nucleotide sequence encoding...

example 3

Analysis on Epitope for Anti-ITM2A Monoclonal Antibody by ELISA

(3-1) Preparation of Partial ITM2A Protein

[0224]The ITM2A extracellular region (Tyr75-Glu263) or a portion thereof (Tyr75-Lys182) was expressed as a GST-fusion protein in E. coli (Tyr75-Glu263: GST-ITM2A-L, and Tyr75-Lys182: GST-ITM2A-S). The fusion protein was C-terminally His-tagged. First, a nucleotide sequence encoding ITM2A (Tyr75-Glu263) or ITM2A (Tyr75-Lys182) was amplified by PCR using pCR2.1_ITM2A as a template, a forward primer (SEQ ID NO: 57) having EcoRI site, and a reverse primer (SEQ ID NO: 58 or 59) having SalI site and a His tag sequence, and cloned into pCR2.1-TOPO vectors. EcoRI / SalI-digested fragments of the plasmids obtained as a result of the cloning were cloned into the EcoRI-SalI sites of pGEX6P-1 vectors (GE Healthcare Bio-Sciences Corp.) to obtain plasmids pGEX_GST-ITM2A-L and pGEX_GST-ITM2A-S, respectively. The nucleotide sequence from start codon to stop codon in pGEX_GST-ITM2A-L is shown in SE...

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Abstract

Disclosed is a monoclonal antibody binding to an ITM2A protein. This antibody is useful in the diagnosis, prevention, and treatment of cancer such as Ewing's sarcoma, T cell leukemia, T cell lymphoma, acute myeloid leukemia, B cell tumor, and multiple myeloma. The present invention also provides a pharmaceutical composition, a cell growth inhibitor, and an anticancer agent containing the antibody as an active ingredient, and a method for treating cancer, a method for predicting the efficacy of cancer treatment, and a method for determining the presence of cancer in a test subject using the antibody.

Description

TECHNICAL FIELDRelated Application[0001]The present application claims the priority based on Japanese Patent Application No. 2011-092488 (filed on Apr. 18, 2011). The contents thereof are incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to an antibody binding to an ITM2A protein, a method for diagnosing cancer, a method for treating cancer, and an anticancer agent.BACKGROUND ART[0003]The ITM2A molecule is a type II membrane protein that is expressed in precursor cells involved in chondrogenesis or osteogenesis (Non Patent Literature 1). This protein is known to be expressed at the early stage of chondrogenesis (Non Patent Literature 2) to inhibit the chondrogenesis (Non Patent Literature 3). ITM2A is also expressed in T cells in the thymus gland (Non Patent Literature 4). The inhibition of T cell activation by an anti-ITM2A polyclonal antibody is disclosed (Patent Literature 1). Patent Literature 1 claims the treatment of T cell leukemia / lymphoma u...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07K16/30G01N33/574
CPCG01N33/57426C07K16/3061C07K16/28C07K2317/732C07K2317/56C07K2317/565G01N33/57407G01N2800/52C07K2317/73A61P35/00A61P35/02
Inventor ABURATANI, HIROYUKIISHIKAWA, SHUMPEIKAWAI, SHIGETO
Owner THE UNIV OF TOKYO
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