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Okita K, Hara Y, Okura H, Hayashi H, Sasaki Y, Masuko S, Kitadai E, Masuko K, Yoshimoto S, Hayashi N, Sugiura R, Endo Y, Okazaki S, Arai S, Yoshioka T, Matsumoto T, Makino Y, Komiyama H, Sakamoto K, Masuko T. Antitumor effects of novel mAbs against cationic amino acid transporter 1 (CAT1) on human CRC with amplified CAT1 gene. Cancer Sci 2020; 112:563-574. [PMID: 33211385 PMCID: PMC7894011 DOI: 10.1111/cas.14741] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/27/2020] [Accepted: 11/15/2020] [Indexed: 12/12/2022] Open
Abstract
Copy number alterations detected by comparative genomic hybridization (CGH) can lead to the identification of novel cancer‐related genes. We analyzed chromosomal aberrations in a set of 100 human primary colorectal cancers (CRCs) using CGH and found a solute carrier (SLC) 7A1 gene, which encodes cationic amino acid transporter 1 (CAT1) with 14 putative transmembrane domains, in a chromosome region (13q12.3) with a high frequency of gene amplifications. SLC7A1/CAT1 is a transporter responsible for the uptake of cationic amino acids (arginine, lysine, and ornithine) essential for cellular growth. Microarray and PCR analyses have revealed that mRNA transcribed from CAT1 is overexpressed in more than 70% of human CRC samples, and RNA interference–mediated knockdown of CAT1 inhibited the cell growth of CRCs. Rats were immunized with rat hepatoma cells expressing CAT1 tagged with green fluorescent protein (GFP), and rat splenocytes were fused with mouse myeloma cells. Five rat monoclonal antibodies (mAbs) (CA1 ~ CA5) reacting with HEK293 cells expressing CAT1‐GFP in a GFP expression–dependent manner were selected from established hybridoma clones. Novel anti‐CAT1 mAbs selectively reacted with human CRC tumor tissues compared with adjacent normal tissues according to immuno‐histochemical staining and bound strongly to numerous human cancer cell lines by flow cytometry. Anti‐CAT1 mAbs exhibited internalization activity, antibody‐dependent cellular cytotoxicity, and migration inhibition activity against CRC cell lines. Furthermore, CA2 inhibited the in vivo growth of human HT29 and SW‐C4 CRC tumors in nude mice. This study suggested CAT1 to be a promising target for mAb therapy against CRCs.
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Affiliation(s)
- Kouki Okita
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan.,Production and Manufacturing, Carna Biosciences, Inc., Kobe, Japan
| | - Yuta Hara
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan
| | - Hiroshi Okura
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan
| | - Hidemi Hayashi
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Yoko Sasaki
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan
| | - Sachiko Masuko
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan.,Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Eri Kitadai
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Tokyo, Japan
| | - Kazue Masuko
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan
| | - Soshi Yoshimoto
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan.,Laboratory of Molecular Pharmacogenomics, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Natsumi Hayashi
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan.,Laboratory of Molecular Pharmacogenomics, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Reiko Sugiura
- Laboratory of Molecular Pharmacogenomics, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Yuichi Endo
- Natural Drug Resources, Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Shogo Okazaki
- Division of Cell Fate Regulation, Research Institute for Biomedical Sciences, Tokyo University of Science, Chiba, Japan
| | - Sayaka Arai
- Field of Basic Science, Department of Occupational therapy, Graduate School of Health Sciences, Akita University, Akita, Japan
| | - Toshiaki Yoshioka
- Field of Basic Science, Department of Occupational therapy, Graduate School of Health Sciences, Akita University, Akita, Japan
| | - Toshiharu Matsumoto
- Department of Diagnostic Pathology, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Yasutaka Makino
- Department of Coloproctological Surgery, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Hiromitsu Komiyama
- Department of Coloproctological Surgery, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Kazuhiro Sakamoto
- Department of Coloproctological Surgery, Faculty of Medicine, Juntendo University, Tokyo, Japan
| | - Takashi Masuko
- Cell Biology Laboratory, School of Pharmacy, Kindai University, Osaka, Japan.,Natural Drug Resources, Faculty of Pharmacy, Kindai University, Osaka, Japan
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Woodward WA, Krishnamurthy S, Yamauchi H, El-Zein R, Ogura D, Kitadai E, Niwa SI, Cristofanilli M, Vermeulen P, Dirix L, Viens P, van Laere S, Bertucci F, Reuben JM, Ueno NT. Genomic and expression analysis of microdissected inflammatory breast cancer. Breast Cancer Res Treat 2013; 138:761-72. [PMID: 23568481 DOI: 10.1007/s10549-013-2501-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 03/23/2013] [Indexed: 12/01/2022]
Abstract
Inflammatory breast cancer (IBC) is a unique clinical entity characterized by rapid onset of erythema and swelling of the breast often without an obvious breast mass. Many studies have examined and compared gene expression between IBC and non-IBC (nIBC), repeatedly finding clusters associated with receptor subtype, but no consistent gene signature associated with IBC has been validated. Here we compared microdissected IBC tumor cells to microdissected nIBC tumor cells matched based on estrogen and HER-2/neu receptor status. Gene expression analysis and comparative genomic hybridization were performed. An IBC gene set and genomic set were identified using a training set and validated on the remaining data. The IBC gene set was further tested using data from IBC consortium samples and publicly available data. Receptor driven clusters were identified in IBC; however, no IBC-specific gene signature was identified. Fifteen genes were correlated between increased genomic copy number and gene overexpression data. An expression-guided gene set upregulated in the IBC training set clustered the validation set into two clusters independent of receptor subtype but segregated only 75 % of samples in each group into IBC or nIBC. In a larger consortium cohort and in published data, the gene set failed to optimally enrich for IBC samples. However, this gene set had a high negative predictive value for excluding the diagnosis of IBC in publicly available data (100 %). An IBC enriched genomic data set accurately identified 10/16 cases in the validation data set. Even with microdissection, no IBC-specific gene signature distinguishes IBC from nIBC. Using microdissected data, a validated gene set was identified that is associated with IBC tumor cells. Inflammatory breast cancer comparative genomic hybridization data are presented, but a validated genomic data set that identifies IBC is not demonstrated.
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Affiliation(s)
- Wendy A Woodward
- Departments of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Nakao K, Tsunoda A, Shimizu Y, Takenaka K, Morohara K, Suzuki N, Yamazaki K, Aoki T, Hoshino M, Kusano M, Kitadai E, Kurihara T, Takeuchi Y, Imawari M. Development of hepatocellular carcinoma following treatment with6-mercaptopurine for ulcerative colitis: investigation of chromosomal aberration by comparative genomic hybridization. Int J Clin Oncol 2005; 10:281-4. [PMID: 16136376 DOI: 10.1007/s10147-005-0484-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2004] [Accepted: 02/14/2005] [Indexed: 10/25/2022]
Abstract
In a 64-year-old man who had been treated with prednisolone (PSL) and 6-mercaptopurine (6MP) for a long period, for ulcerative colitis (UC), hepatocellular carcinoma (HCC) was detected incidentally. The UC was in remission with these medications. After he had been taking these medications for about 8 years, HCC was detected by computed tomography (CT), done for the evaluation of an other disease. Blood chemistry examination results were normal, except that the protein induced by vitamin K antagonist (PIVKA)-II level was 7940 AU/ml. We performed resection of liver segment V. With comparative genomic hybridization, chromosomal aberrations were recognized; these were gains of 1q, 3ptel-21, 8p12, and 22q11.23-22q13.1. Generally, HCC is associated with hepatitis virus infection in most cases, but in this patient, the HCC was not related to hepatitis C virus (HCV) or HBV. It is presumed that this case was related to the immunosuppressive therapy for UC and was associated with the gains of 1q, 3p, and 8p.
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MESH Headings
- Carcinoma, Hepatocellular/chemically induced
- Carcinoma, Hepatocellular/diagnostic imaging
- Carcinoma, Hepatocellular/genetics
- Chromosome Aberrations
- Chromosomes, Human, Pair 1/genetics
- Chromosomes, Human, Pair 22/genetics
- Chromosomes, Human, Pair 3/genetics
- Chromosomes, Human, Pair 8/genetics
- Colitis, Ulcerative/drug therapy
- Colitis, Ulcerative/immunology
- Gene Amplification
- Humans
- Immunosuppressive Agents/adverse effects
- In Situ Hybridization, Fluorescence
- Karyotyping
- Liver Neoplasms/chemically induced
- Liver Neoplasms/diagnostic imaging
- Liver Neoplasms/genetics
- Male
- Mercaptopurine/adverse effects
- Middle Aged
- Nucleic Acid Hybridization
- Tomography, X-Ray Computed
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Affiliation(s)
- Kentaro Nakao
- Second Department of Surgery, Showa University School of Medicine, 1-5-8 Hatanodai, Tokyo 146-8666, Japan.
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