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Nagato T, Komatsuda H, Hayashi R, Takahara M, Kishibe K, Yasuda S, Yajima Y, Kosaka A, Ohkuri T, Oikawa K, Harabuchi S, Kono M, Yamaki H, Wakisaka R, Hirata-Nozaki Y, Ohara K, Kumai T, Katada A, Hayashi T, Harabuchi Y, Kobayashi H. Expression of soluble CD27 in extranodal natural killer/T-cell lymphoma, nasal type: potential as a biomarker for diagnosis and CD27/CD70-targeted therapy. Cancer Immunol Immunother 2023:10.1007/s00262-023-03394-7. [PMID: 36811663 DOI: 10.1007/s00262-023-03394-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 01/31/2023] [Indexed: 02/24/2023]
Abstract
The engagement of CD27 on lymphocytes with its ligand, CD70, on tumors is believed to mediate tumor immune evasion and the elevation of serum soluble CD27 (sCD27) levels in patients with CD70-positive malignancies. We previously showed that CD70 is expressed in extranodal natural killer/T-cell lymphoma, nasal type (ENKL), an Epstein-Barr virus (EBV)-related malignancy. However, little is known about serum sCD27 expression and its association with the clinical characteristics of, and the CD27/CD70 interaction in, ENKL. In the present study, we show that serum sCD27 is significantly elevated in the sera of patients with ENKL. The levels of serum sCD27 provided excellent diagnostic accuracy for discriminating patients with ENKL from healthy subjects, correlated positively with the levels of other diagnostic markers (lactate dehydrogenase, soluble interleukin-2 receptor, and EBV-DNA), and decreased significantly following treatment. Elevated serum sCD27 levels also correlated significantly with advanced clinical stage and tended to correspond with shorter survival, in patients with ENKL. Immunohistochemistry indicated that CD27-positive tumor-infiltrating immune cells exist adjacent to CD70-positive lymphoma cells. In addition, serum sCD27 levels in patients with CD70-positive ENKL were significantly higher than those in patients with CD70-negative ENKL, suggesting that the intra-tumoral CD27/CD70 interaction boosts the release of sCD27 in serum. Furthermore, the EBV-encoded oncoprotein latent membrane protein 1 upregulated CD70 expression in ENKL cells. Our results suggest that sCD27 may serve as a novel diagnostic biomarker and also may serve as a tool for evaluating the applicability of CD27/CD70-targeted therapies by predicting intra-tumoral CD70 expression and CD27/CD70 interaction in ENKL.
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Affiliation(s)
- Toshihiro Nagato
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan.
| | - Hiroki Komatsuda
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan.,Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Ryusuke Hayashi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Miki Takahara
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.,Department of Innovative Research for Diagnosis and Treatment of Head and Neck Cancer, Asahikawa Medical University, Asahikawa, Japan
| | - Kan Kishibe
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Shunsuke Yasuda
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan.,Respiratory and Breast Center, Asahikawa Medical University Hospital, Asahikawa, Japan
| | - Yuki Yajima
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan.,Department of Oral and Maxillofacial Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Akemi Kosaka
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Takayuki Ohkuri
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Kensuke Oikawa
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Shohei Harabuchi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Michihisa Kono
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Hidekiyo Yamaki
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Risa Wakisaka
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Yui Hirata-Nozaki
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Kenzo Ohara
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Takumi Kumai
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.,Department of Innovative Research for Diagnosis and Treatment of Head and Neck Cancer, Asahikawa Medical University, Asahikawa, Japan
| | - Akihiro Katada
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Tatsuya Hayashi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Yasuaki Harabuchi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.,Department of Otolaryngology-Head and Neck Surgery, Hokuto Hospital, Obihiro, Japan
| | - Hiroya Kobayashi
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan.
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Lees DM, Reynolds LE, Pedrosa AR, Roy-Luzarraga M, Hodivala-Dilke KM. Phosphorylation of pericyte FAK-Y861 affects tumour cell apoptosis and tumour blood vessel regression. Angiogenesis 2021; 24:471-482. [PMID: 33730293 PMCID: PMC8292267 DOI: 10.1007/s10456-021-09776-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 02/25/2021] [Indexed: 12/20/2022]
Abstract
Focal adhesion kinase (FAK) is a non-receptor tyrosine kinase that is overexpressed in many cancer types and in vivo studies have shown that vascular endothelial cell FAK expression and FAK-phosphorylation at tyrosine (Y) 397, and subsequently FAK-Y861, are important in tumour angiogenesis. Pericytes also play a vital role in regulating tumour blood vessel stabilisation, but the specific involvement of pericyte FAK-Y397 and FAK-Y861 phosphorylation in tumour blood vessels is unknown. Using PdgfrβCre + ;FAKWT/WT, PdgfrβCre + ;FAKY397F/Y397F and PdgfrβCre + ;FAKY861F/Y861F mice, our data demonstrate that Lewis lung carcinoma tumour growth, tumour blood vessel density, blood vessel perfusion and pericyte coverage were affected only in late stage tumours in PdgfrβCre + ;FAKY861F/Y861F but not PdgfrβCre + ;FAKY397F/Y397F mice. Further examination indicates a dual role for pericyte FAK-Y861 phosphorylation in the regulation of tumour vessel regression and also in the control of pericyte derived signals that influence apoptosis in cancer cells. Overall this study identifies the role of pericyte FAK-Y861 in the regulation of tumour vessel regression and tumour growth control and that non-phosphorylatable FAK-Y861F in pericytes reduces tumour growth and blood vessel density.
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Affiliation(s)
- Delphine M Lees
- Adhesion and Angiogenesis Laboratory, Centre for Tumour Microenvironment, Barts Cancer Institute - a CR-UK Centre of Excellence, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, EC1M 6BQ, UK
| | - Louise E Reynolds
- Adhesion and Angiogenesis Laboratory, Centre for Tumour Microenvironment, Barts Cancer Institute - a CR-UK Centre of Excellence, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, EC1M 6BQ, UK
| | - Ana Rita Pedrosa
- Adhesion and Angiogenesis Laboratory, Centre for Tumour Microenvironment, Barts Cancer Institute - a CR-UK Centre of Excellence, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, EC1M 6BQ, UK
| | - Marina Roy-Luzarraga
- Adhesion and Angiogenesis Laboratory, Centre for Tumour Microenvironment, Barts Cancer Institute - a CR-UK Centre of Excellence, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, EC1M 6BQ, UK
| | - Kairbaan M Hodivala-Dilke
- Adhesion and Angiogenesis Laboratory, Centre for Tumour Microenvironment, Barts Cancer Institute - a CR-UK Centre of Excellence, Queen Mary University of London, John Vane Science Centre, Charterhouse Square, London, EC1M 6BQ, UK.
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Extranodal NK/T-Cell Lymphoma, Nasal Type: Genetic, Biologic, and Clinical Aspects with a Central Focus on Epstein-Barr Virus Relation. Microorganisms 2021; 9:microorganisms9071381. [PMID: 34202088 PMCID: PMC8304202 DOI: 10.3390/microorganisms9071381] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 06/21/2021] [Indexed: 12/18/2022] Open
Abstract
Extranodal NK/T-Cell Lymphoma, nasal type (ENKTL-NT) has some salient aspects. The lymphoma is commonly seen in Eastern Asia, has progressive necrotic lesions in the nasal cavity, makes midfacial destructive lesions, and shows poor prognosis. The lymphoma cell is originated from either NK- or γδ T-cells, which express CD56. Since the authors first demonstrated the existence of Epstein–Barr virus (EBV) DNA and EBV oncogenic proteins in lymphoma cells, ENKTL-NT has been recognized as an EBV-associated malignancy. Because the angiocentric and polymorphous lymphoma cells are mixed with inflammatory cells on a necrotic background, the diagnosis of ENKTL-NT requires CD56 immunostaining and EBER in situ hybridization. In addition, serum the EBV DNA level is useful for the diagnosis and monitoring of ENKTL-NT. Although ENKTL-NT is refractory lymphoma, the prognosis is improved by the development of therapies such as concomitant chemoradiotherapy. The basic research reveals that a wide variety of intracellular/cell surface molecules, cytokines, chemokines, and micro RNAs are involved in lymphomagenesis, and some of them are related to EBV. Understanding lymphoma behavior introduces new therapeutic strategies, such as the usage of immune checkpoint inhibitors, peptide vaccines, and molecular targeting therapy. This review addresses recent advances in basic and clinical aspects of ENKTL-NT, especially its relation to EBV features.
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Cyclin-dependent kinase 1 and survivin as potential therapeutic targets against nasal natural killer/T-cell lymphoma. J Transl Med 2019; 99:612-624. [PMID: 30664711 DOI: 10.1038/s41374-018-0182-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 11/13/2018] [Accepted: 11/17/2018] [Indexed: 01/30/2023] Open
Abstract
Nasal natural killer/T-cell lymphoma (NNKTL) is closely associated with Epstein-Barr virus (EBV) and is characterized by poor prognosis, resulting from rapid progression of lesions in the affected organs. Recent data have shown that NNKTL is associated with the aberrant expression of cyclin-dependent kinase 1 (CDK1) and its downstream target survivin, but little is known about the functional roles of CDK1 and survivin in NNKTL. In the current study, we show that knockdown of the EBV-encoded oncoprotein latent membrane protein 1 (LMP1) induces downregulation of CDK1 and survivin in NNKTL cells. Immunohistochemistry detected CDK1 and survivin expression in LMP1-positive cells of NNKTL biopsy specimens. Inhibition of CDK1 and survivin in NNKTL cells with several inhibitors led to a dose-dependent decrease in cell proliferation. In addition, the Sp1 inhibitor mithramycin, which can downregulate both CDK1 and survivin, significantly suppressed the growth of established NNKTL in a murine xenograft model. Our results suggest that LMP1 upregulation of CDK1 and survivin may be essential for NNKTL progression. Furthermore, targeting CDK1 and survivin with Sp1 inhibitors such as mithramycin may be an effective approach to treat NNKTL, which is considered to be a treatment-refractory lymphoma.
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Harabuchi Y, Takahara M, Kishibe K, Nagato T, Kumai T. Extranodal Natural Killer/T-Cell Lymphoma, Nasal Type: Basic Science and Clinical Progress. Front Pediatr 2019; 7:141. [PMID: 31041299 PMCID: PMC6476925 DOI: 10.3389/fped.2019.00141] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/26/2019] [Indexed: 12/28/2022] Open
Abstract
Extranodal natural killer (NK)/T-cell lymphoma, nasal type (NNKTL) has very unique epidemiological, etiologic, histologic, and clinical characteristics. It is commonly observed in Eastern Asia, but quite rare in the United States and Europe. The progressive necrotic lesions mainly in the nasal cavity, poor prognosis caused by rapid local progression with distant metastases, and angiocentric and polymorphous lymphoreticular infiltrates are the main clinical and histologic features. Phenotypic and genotypic studies revealed that the lymphoma is originated from either NK- or γδ T-cell, both of which express CD56. In 1990, the authors first reported the presence of Epstein-Barr virus (EBV)-DNA and EBV-oncogenic proteins, and EBV has now been recognized to play an etiological role in NNKTL. in vitro studies revealed that a wide variety of cytokines, chemokines, and micro RNAs, which may be produced by EBV-oncogenic proteins in the lymphoma cells, play important roles for tumor progression in NNKTL, and could be therapeutic targets. In addition, it was revealed that the interaction between NNKTL cells and immune cells such as monocytes and macrophages in NNKTL tissues contribute to lymphoma progression. For diagnosis, monitoring the clinical course and predicting prognosis, the measurements of EBV-DNAs and EBV-micro RNAs in sera are very useful. For treatment with early stage, novel concomitant chemoradiotherapy such as DeVIC regimen with local radiotherapy and MPVIC-P regimen using intra-arterial infusion developed with concomitant radiotherapy and the prognosis became noticeably better. However, the prognosis of patients with advanced stage was still poor. Establishment of novel treatments such as the usage of immune checkpoint inhibitor or peptide vaccine with molecular targeting therapy will be necessary. This review addresses recent advances in the molecular understanding of NNKTL to establish novel treatments, in addition to the epidemiologic, clinical, pathological, and EBV features.
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Affiliation(s)
- Yasuaki Harabuchi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Miki Takahara
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Kan Kishibe
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Toshihiro Nagato
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Takumi Kumai
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan.,Department of Innovative Head and Neck Cancer Research and Treatment, Asahikawa Medical University, Asahikawa, Japan
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Rutherford EJ, Hill ADK, Hopkins AM. Adhesion in Physiological, Benign and Malignant Proliferative States of the Endometrium: Microenvironment and the Clinical Big Picture. Cells 2018; 7:E43. [PMID: 29772648 PMCID: PMC5981267 DOI: 10.3390/cells7050043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 05/09/2018] [Accepted: 05/11/2018] [Indexed: 12/13/2022] Open
Abstract
Although the developments in cellular and molecular biology over the last few decades have significantly advanced our understanding of the processes and players that regulate invasive disease, many areas of uncertainty remain. This review will discuss the contribution of dysregulated cell⁻cell and cell⁻matrix adhesion to the invasion in both benign and malignant contexts. Using the endometrium as an illustrative tissue that undergoes clinically significant invasion in both contexts, the adhesion considerations in the cells ("seed") and their microenvironment ("soil") will be discussed. We hope to orientate this discussion towards translational relevance for the diagnosis and treatment of endometrial conditions, which are currently associated with significant morbidity and mortality.
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Affiliation(s)
- Emily J Rutherford
- Department of Surgery, Royal College of Surgeons in Ireland, RCSI Smurfit Building, Beaumont Hospital, Dublin 9, Ireland.
| | - Arnold D K Hill
- Department of Surgery, Royal College of Surgeons in Ireland, RCSI Smurfit Building, Beaumont Hospital, Dublin 9, Ireland.
| | - Ann M Hopkins
- Department of Surgery, Royal College of Surgeons in Ireland, RCSI Smurfit Building, Beaumont Hospital, Dublin 9, Ireland.
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Benedicto A, Romayor I, Arteta B. Role of liver ICAM-1 in metastasis. Oncol Lett 2017; 14:3883-3892. [PMID: 28943897 DOI: 10.3892/ol.2017.6700] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 07/07/2017] [Indexed: 12/15/2022] Open
Abstract
Intercellular adhesion molecule (ICAM)-1, is a transmembrane glycoprotein of the immunoglobulin (Ig)-like superfamily, consisting of five extracellular Ig-like domains, a transmembrane domain and a short cytoplasmic tail. ICAM-1 is expressed in various cell types, including endothelial cells and leukocytes, and is involved in several physiological processes. Furthermore, it has additionally been reported to be expressed in various cancer cells, including melanoma, colorectal cancer and lymphoma. The majority of studies to date have focused on the expression of the ICAM-1 on the surface of tumor cells, without research into ICAM-1 expression at sites of metastasis. Cancer cells frequently metastasize to the liver, due to its unique physiology and specialized liver sinusoid capillary network. Liver sinusoidal endothelial cells constitutively express ICAM-1, which is upregulated under inflammatory conditions. Furthermore, liver ICAM-1 may be important during the development of liver metastasis. Therefore, it is necessary to improve the understanding of the mechanisms mediated by this adhesion molecule in order to develop host-directed anticancer therapies.
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Affiliation(s)
- Aitor Benedicto
- Department of Cell Biology and Histology, School of Medicine and Nursing, University of The Basque Country, UPV/EHU, Leioa, E-48940 Vizcaya, Spain
| | - Irene Romayor
- Department of Cell Biology and Histology, School of Medicine and Nursing, University of The Basque Country, UPV/EHU, Leioa, E-48940 Vizcaya, Spain
| | - Beatriz Arteta
- Department of Cell Biology and Histology, School of Medicine and Nursing, University of The Basque Country, UPV/EHU, Leioa, E-48940 Vizcaya, Spain
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Komabayashi Y, Kishibe K, Nagato T, Ueda S, Takahara M, Harabuchi Y. Circulating Epstein-Barr virus-encoded micro-RNAs as potential biomarkers for nasal natural killer/T-cell lymphoma. Hematol Oncol 2016; 35:655-663. [PMID: 27709652 DOI: 10.1002/hon.2360] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 08/24/2016] [Accepted: 08/31/2016] [Indexed: 12/27/2022]
Abstract
Nasal natural killer/T-cell lymphoma (NNKTL) is an Epstein-Barr virus (EBV)-associated malignancy and is characterized by local invasion and widespread dissemination, with a consequent poor prognosis. Micro-RNAs (miRNAs) play roles in the pathogenesis of several malignancies by regulating gene expression and have been recently identified as stable entities in serum. Here, we investigated the value of circulating EBV-miRNAs as biomarkers for NNKTL. Sera of patients with NNKTL were subjected to miRNA polymerase chain reaction (PCR)-array analysis, after which serum EBV-miRNA levels were verified using quantitative PCR. The latter analysis revealed high miR-BART2-5p, miR-BART7-3p, miR-BART13-3p, and miR-BART1-5p expression levels in sera of patients with NNKTL and indicated accurate values for discriminating patients with NNKTL from healthy controls. Levels of these 4 EBV-miRNAs, which were secreted from NNKTL cells, significantly decreased after treatment compared with those before treatment. Furthermore, a high circulating miR-BART2-5p level was associated with disease progression and poor prognosis in patients with NNKTL. Our findings demonstrate that circulating EBV-miRNAs, particularly miR-BART2-5p, may serve as potential diagnostic and prognostic biomarkers in patients with NNKTL.
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Affiliation(s)
- Yuki Komabayashi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Kan Kishibe
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Toshihiro Nagato
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Seigo Ueda
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Miki Takahara
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
| | - Yasuaki Harabuchi
- Department of Otolaryngology-Head and Neck Surgery, Asahikawa Medical University, Asahikawa, Japan
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CCL17 and CCL22/CCR4 signaling is a strong candidate for novel targeted therapy against nasal natural killer/T-cell lymphoma. Cancer Immunol Immunother 2015; 64:697-705. [PMID: 25754123 DOI: 10.1007/s00262-015-1675-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 02/26/2015] [Indexed: 12/23/2022]
Abstract
Nasal natural killer/T-cell lymphoma (NNKTL) is associated with Epstein-Barr virus and has a poor prognosis because of local invasion and/or multiple dissemination. Various chemokines play a role in tumor proliferation and invasion, and chemokine receptors including the C-C chemokine receptor 4 (CCR4) are recognized as potential targets for treating hematologic malignancies. The aim of the present study was to determine whether specific chemokines are produced by NNKTL. We compared chemokine expression patterns in culture supernatants of NNKTL cell lines with those of other lymphoma or leukemia cell lines using chemokine protein array and ELISA. Chemokine (C-C motif) ligand (CCL) 17 and CCL22 were highly produced by NNKTL cell lines as compared to the other cell lines. In addition, CCL17 and CCL22 were readily observed in the sera of NNKTL patients. The levels of these chemokines were significantly higher in patients than in healthy controls. Furthermore, we detected the expression of CCR4 (the receptor for CCL17 and CCL22) on the surface of NNKTL cell lines and in tissues of NNKTL patients. Anti-CCR4 monoclonal antibody (mAb) efficiently induced antibody-dependent cellular cytotoxicity mediated by natural killer cells against NNKTL cell lines. Our results suggest that CCL17 and CCL22 may be important factors in the development of NNKTL and open up the possibility of immunotherapy of this lymphoma using anti-CCR4 mAb.
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