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Ureshino H, Kamachi K, Kimura S. Second Treatment-Free Remission Attempt in Patients with Chronic Myeloid Leukemia. Clin Lymphoma Myeloma Leuk 2024; 24:e138-e141. [PMID: 38195325 DOI: 10.1016/j.clml.2023.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 01/11/2024]
Abstract
Long-term survival outcomes of patients with chronic myeloid leukemia in the chronic phase are now similar to those of the general population, following the introduction of ABL1 tyrosine kinase inhibitors (TKIs). Approximately 40% to 80% of patients with chronic myeloid leukemia successfully achieved treatment-free remission after the first attempt of TKI discontinuation (TFR1), after achieving a durable deep molecular response. However, the possibility of achieving treatment-free remission after a second attempt of TKI discontinuation (TFR2) remains unclear. Therefore, we reviewed current TFR2 studies to clarify the feasibility of achieving TFR2. We identified 5 TFR2 clinical trials and 2 real-world reports. TFR2 attempt may be feasible after retreatment with imatinib, nilotinib, or dasatinib. Patients who have achieved MR4.0 or deeper durable molecular remission are eligible to enter the TFR2 phase. Imatinib is well tolerated and can be administered for consolidative treatment before the TFR2 attempt, whereas drug-related adverse effects of nilotinib or dasatinib affect their tolerability and might lead to discontinuation. Late onset relapse (> 1 year or > 2 year) was often reported, thus careful monitoring is needed.
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Affiliation(s)
- Hiroshi Ureshino
- Department of Hematology and Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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2
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Watanabe T, Yamamoto Y, Kurahashi Y, Kawasoe K, Kidoguchi K, Ureshino H, Kamachi K, Yoshida-Sakai N, Fukuda-Kurahashi Y, Nakamura H, Okada S, Sueoka E, Kimura S. Reprogramming of pyrimidine nucleotide metabolism supports vigorous cell proliferation of normal and malignant T cells. Blood Adv 2024; 8:1345-1358. [PMID: 38190613 PMCID: PMC10945144 DOI: 10.1182/bloodadvances.2023011131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/05/2023] [Revised: 12/29/2023] [Accepted: 12/31/2023] [Indexed: 01/10/2024] Open
Abstract
ABSTRACT Adult T-cell leukemia/lymphoma (ATL) is triggered by infection with human T-cell lymphotropic virus-1 (HTLV-1). Here, we describe the reprogramming of pyrimidine biosynthesis in both normal T cells and ATL cells through regulation of uridine-cytidine kinase 2 (UCK2), which supports vigorous proliferation. UCK2 catalyzes the monophosphorylation of cytidine/uridine and their analogues during pyrimidine biosynthesis and drug metabolism. We found that UCK2 was overexpressed aberrantly in HTLV-1-infected T cells but not in normal T cells. T-cell activation via T-cell receptor (TCR) signaling induced expression of UCK2 in normal T cells. Somatic alterations and epigenetic modifications in ATL cells activate TCR signaling. Therefore, we believe that expression of UCK2 in HTLV-1-infected cells is induced by dysregulated TCR signaling. Recently, we established azacitidine-resistant (AZA-R) cells showing absent expression of UCK2. AZA-R cells proliferated normally in vitro, whereas UCK2 knockdown inhibited ATL cell growth. Although uridine and cytidine accumulated in AZA-R cells, possibly because of dysfunction of pyrimidine salvage biosynthesis induced by loss of UCK2 expression, the amount of UTP and CTP was almost the same as in parental cells. Furthermore, AZA-R cells were more susceptible to an inhibitor of dihydroorotic acid dehydrogenase, which performs the rate-limiting enzyme of de novo pyrimidine nucleotide biosynthesis, and more resistant to dipyridamole, an inhibitor of pyrimidine salvage biosynthesis, suggesting that AZA-R cells adapt to UCK2 loss by increasing de novo pyrimidine nucleotide biosynthesis. Taken together, the data suggest that fine-tuning pyrimidine biosynthesis supports vigorous cell proliferation of both normal T cells and ATL cells.
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Affiliation(s)
- Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- OHARA Pharmaceutical Co, Ltd, Shiga, Japan
| | - Kazunori Kawasoe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Keisuke Kidoguchi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Nao Yoshida-Sakai
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- OHARA Pharmaceutical Co, Ltd, Shiga, Japan
| | - Hideaki Nakamura
- Department of Transfusion Medicine, Saga University Hospital, Saga, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
| | - Eisaburo Sueoka
- Department of Clinical Laboratory Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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3
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Fukushima N, Kamachi K, Sato T, Ishii K, Tomimasu R, Miyahara M. Anaphylaxis and Severe Disseminated Intravascular Coagulation Due to Remdesivir. Intern Med 2024; 63:873-876. [PMID: 38220191 PMCID: PMC11008986 DOI: 10.2169/internalmedicine.2994-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/23/2023] [Indexed: 01/16/2024] Open
Abstract
A 69-year-old woman suffering with multiple myeloma developed coronavirus disease 2019 (COVID-19). Shortly after administration of remdesivir, she presented with symptoms of facial flushing, wheezing, and hypoxemia. Subsequently, thrombocytopenia and hypofibrinogenemia rapidly manifested, leading to a diagnosis of enhanced fibrinolytic-type disseminated intravascular coagulopathy (DIC). This clinical presentation was considered an immediate hypersensitivity reaction with associated coagulation abnormalities induced by remdesivir. Although remdesivir is generally considered safe and efficacious in the treatment of COVID-19, physicians should remain vigilant regarding the potential for severe adverse events associated with this medication.
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Affiliation(s)
| | | | - Tomonori Sato
- Internal Medicine, Karatsu Red Cross Hospital, Japan
| | - Keitaro Ishii
- Internal Medicine, Karatsu Red Cross Hospital, Japan
| | - Rika Tomimasu
- Internal Medicine, Karatsu Red Cross Hospital, Japan
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4
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Kawasoe K, Watanabe T, Yoshida-Sakai N, Yamamoto Y, Kurahashi Y, Kidoguchi K, Ureshino H, Kamachi K, Fukuda-Kurahashi Y, Kimura S. A Combination of Alectinib and DNA-Demethylating Agents Synergistically Inhibits Anaplastic-Lymphoma-Kinase-Positive Anaplastic Large-Cell Lymphoma Cell Proliferation. Cancers (Basel) 2023; 15:5089. [PMID: 37894456 PMCID: PMC10605931 DOI: 10.3390/cancers15205089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 10/07/2023] [Accepted: 10/19/2023] [Indexed: 10/29/2023] Open
Abstract
The recent evolution of molecular targeted therapy has improved clinical outcomes in several human malignancies. The translocation of anaplastic lymphoma kinase (ALK) was originally identified in anaplastic large-cell lymphoma (ALCL) and subsequently in non-small cell lung carcinoma (NSCLC). Since ALK fusion gene products act as a driver of carcinogenesis in both ALCL and NSCLC, several ALK tyrosine kinase inhibitors (TKIs) have been developed. Crizotinib and alectinib are first- and second-generation ALK TKIs, respectively, approved for the treatment of ALK-positive ALCL (ALK+ ALCL) and ALK+ NSCLC. Although most ALK+ NSCLC patients respond to crizotinib and alectinib, they generally relapse after several years of treatment. We previously found that DNA-demethylating agents enhanced the efficacy of ABL TKIs in chronic myeloid leukemia cells. Moreover, aberrant DNA methylation has also been observed in ALCL cells. Thus, to improve the clinical outcomes of ALK+ ALCL therapy, we investigated the synergistic efficacy of the combination of alectinib and the DNA-demethylating agent azacytidine, decitabine, or OR-2100 (an orally bioavailable decitabine derivative). As expected, the combination of alectinib and DNA-demethylating agents synergistically suppressed ALK+ ALCL cell proliferation, concomitant with DNA hypomethylation and a reduction in STAT3 (a downstream target of ALK fusion proteins) phosphorylation. The combination of alectinib and OR-2100 markedly altered gene expression in ALCL cells, including that of genes implicated in apoptotic signaling, which possibly contributed to the synergistic anti-ALCL effects of this drug combination. Therefore, alectinib and OR-2100 combination therapy has the potential to improve the outcomes of patients with ALK+ ALCL.
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Affiliation(s)
- Kazunori Kawasoe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Nao Yoshida-Sakai
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- OHARA Pharmaceutical Co., Ltd., Koka 520-3403, Japan
| | - Keisuke Kidoguchi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- OHARA Pharmaceutical Co., Ltd., Koka 520-3403, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga 849-8501, Japan
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga 849-8501, Japan
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5
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Sugihara A, Ureshino H, Yamasaki M, Fukuda M, Yoshihara M, Nonaka E, Miyazaki M, Fujita M, Ishii K, Kamachi K, Sano H, Okamoto S, Itamura H, Yoshimura M, Katsuya H, Ando T, Aoki S, Ubara Y, Kimura S. Type II Cryoglobulinemic Membranoproliferative Glomerulonephritis Caused by Mucosa-associated Lymphoid Tissue Lymphoma. Intern Med 2023; 62:1983-1988. [PMID: 37394661 PMCID: PMC10372288 DOI: 10.2169/internalmedicine.0756-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/04/2023] Open
Abstract
A 67-year-old man complained of lower limb edema with a purpuric skin rash. Laboratory tests revealed proteinuria, elevated serum creatinine levels, and low serum albumin levels. The patient was also positive for cryoglobulin in serum, immunoglobulin (Ig) M gammopathy, hypocomplementemia, and rheumatoid factor. He was negative for anti-hepatitis C virus antibodies. A pathological analysis of the renal tissue revealed membranoproliferative glomerulonephritis, common histological features of cryoglobulinemic vasculitis (CV), and mucosa-associated lymphoid tissue lymphoma invasion. Although hematologic malignancy is a rare cause of type II CV, these clinical findings suggest that mucosa-associated lymphoid tissue lymphoma (MALT) lymphoma may have been the cause in the present case.
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Affiliation(s)
- Ayano Sugihara
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Hematology and Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
| | - Masatora Yamasaki
- Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Makoto Fukuda
- Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Maki Yoshihara
- Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Eriko Nonaka
- Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mariko Miyazaki
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mai Fujita
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Keitaro Ishii
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Haruhiko Sano
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Sho Okamoto
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Hidekazu Itamura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Hiroo Katsuya
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Shigehisa Aoki
- Division of Pathology, Department of Pathology and Microbiology, Faculty of Medicine, Saga University, Japan
| | | | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
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6
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Kamachi K, Ureshino H, Watanabe T, Yoshida-Sakai N, Fukuda-Kurahashi Y, Kawasoe K, Hoshiko T, Yamamoto Y, Kurahashi Y, Kimura S. Combination of a New Oral Demethylating Agent, OR2100, and Venetoclax for Treatment of Acute Myeloid Leukemia. Cancer Res Commun 2023; 3:297-308. [PMID: 36860654 PMCID: PMC9973401 DOI: 10.1158/2767-9764.crc-22-0259] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 12/18/2022] [Accepted: 02/03/2023] [Indexed: 02/10/2023]
Abstract
The standard treatment for elderly patients with acute myeloid leukemia (AML) is venetoclax (Ven), a BCL-2-selective inhibitor, combined with hypomethylating agents (HMA) such as azacitidine or decitabine. This regimen results in low toxicity, high response rates, and potentially durable remission; however, because of low oral bioavailability, these conventional HMAs must be administered intravenously or subcutaneously. A combination of oral HMAs and Ven would provide a therapeutic advantage over parenteral administration of drugs and improve quality of life by reducing the number of hospital visits. Previously, we showed the promising oral bioavailability and antileukemia effects of a new HMA, OR2100 (OR21). Here, we investigated the efficacy and underlying mechanism of OR21 when used in combination with Ven to treat AML. OR21/Ven showed synergistic antileukemia effects in vitro, and significantly prolonged survival without increasing toxicity in a human leukemia xenograft mice model. RNA sequencing following combination therapy revealed downregulation of VAMP7, which is involved in autophagic maintenance of mitochondrial homeostasis. Combination therapy led to accumulation of reactive oxygen species, leading to increased apoptosis. The data suggest that the combination of OR21 plus Ven is a promising candidate oral therapy for AML. Significance The standard treatment for elderly patients with AML is Ven combined with HMAs. OR21, a new oral HMA plus Ven showed synergistic antileukemia effects in vitro and vivo, suggesting that the combination of OR2100 plus Ven is a promising candidate oral therapy for AML.
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Affiliation(s)
- Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan.,Department of Hematology and Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.,Corresponding Author: Hiroshi Ureshino, Saga University School of Medicine, 5-1-1 Nabeshima, Saga 849-8501, Japan. Phone: 819-5234-2366; Fax: 819-5234-2017; E-mail:
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Nao Yoshida-Sakai
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,OHARA Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Kazunori Kawasoe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Toshimi Hoshiko
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,OHARA Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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7
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Ureshino H, Kamachi K, Sano H, Okamoto S, Itamura H, Yoshimura M, Katsuya H, Ando T, Kimura S. Higher neutrophil counts are associated with successful tyrosine kinase inhibitor discontinuation in patients with chronic myeloid leukemia. Hematology 2022; 27:1171-1175. [DOI: 10.1080/16078454.2022.2135857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Haruhiko Sano
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Sho Okamoto
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Hidekazu Itamura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Hiroo Katsuya
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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8
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Ureshino H, Kamachi K, Shindo T, Kimura S. Favorable HLA Polymorphisms are Associated with Lower Molecular Relapse after Tyrosine Kinase Discontinuation in Patients with Chronic Myeloid Leukemia. Indian J Hematol Blood Transfus 2022; 38:760-761. [PMID: 36258730 PMCID: PMC9569246 DOI: 10.1007/s12288-022-01538-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/06/2022] [Indexed: 10/18/2022] Open
Affiliation(s)
- Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501 Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501 Japan
| | - Takero Shindo
- Department of Hematology and Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501 Japan
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9
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Ishii K, Kamachi K, Okamoto S, Katsuya H, Fujita M, Nagaie T, Nishioka A, Yoshimura M, Ureshino H, Kubota Y, Ando T, Watanabe T, Takeuchi M, Kai K, Ohshima K, Kimura S. Diffuse Large B-cell Lymphoma Involving an Abundant Infiltration of T Follicular Helper Cells: A Case Report. Intern Med 2022; 62:1335-1340. [PMID: 36130892 DOI: 10.2169/internalmedicine.0521-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 76-year-old man presented with skin plaque and splenic nodules, and diffuse large B-cell lymphoma (DLBCL) with infiltration of T-cells was suspected based on the skin lesions. The disease showed indolent clinical behavior for three months, when systemic lymphadenopathy rapidly evolved. An inguinal lymph node biopsy revealed DLBCL with abundant infiltration of T follicular helper (TFH) cells. A polymerase chain reaction-based analysis of immunoglobulin variable heavy chain showed that the skin, splenic nodules, and inguinal lymph node shared the same clone. This case indicates that the dysregulated infiltration of TFH cells in the tumor microenvironment accelerates the lymphomagenesis and progression of DLBCL.
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Affiliation(s)
- Keitaro Ishii
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Japan
| | - Sho Okamoto
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Hiroo Katsuya
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mai Fujita
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Toshiaki Nagaie
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Japan
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Transfusion Medicine and Cell Therapy, Saitama Medical Center, Saitama Medical University, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Japan
| | - Mai Takeuchi
- Department of Pathology, Kurume University School of Medicine, Japan
| | - Keita Kai
- Department of Pathology, Saga University Hospital, Japan
| | - Koichi Ohshima
- Department of Pathology, Kurume University School of Medicine, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Japan
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10
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Kamachi K, Ureshino H, Watanabe T, Yoshida N, Yamamoto Y, Kurahashi Y, Fukuda-Kurahashi Y, Hayashi Y, Hirai H, Yamashita S, Ushijima T, Okada S, Kimura S. Targeting DNMT1 by demethylating agent OR-2100 increases tyrosine kinase inhibitors-sensitivity and depletes leukemic stem cells in chronic myeloid leukemia. Cancer Lett 2022; 526:273-283. [PMID: 34875342 DOI: 10.1016/j.canlet.2021.11.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/28/2021] [Accepted: 11/30/2021] [Indexed: 12/20/2022]
Abstract
ABL1 tyrosine kinase inhibitors (TKIs) dramatically improve the prognosis of chronic myeloid leukemia (CML), but 10-20% of patients achieve suboptimal responses with low TKIs sensitivity. Furthermore, residual leukemic stem cells (LSCs) are involved in the molecular relapse after TKIs discontinuation. Aberrant DNA hypermethylation contributes to low TKIs sensitivity and the persistence of LSCs in CML. DNMT1 is a key regulator of hematopoietic stem cells, suggesting that aberrant DNA hypermethylation targeting DNMT1 represents a potential therapeutic target for CML. We investigated the efficacy of OR-2100 (OR21), the first orally available single-compound prodrug of decitabine. OR21 exhibited anti-tumor effects as a monotherapy, and in combination therapy it increased TKI-induced apoptosis and induction of tumor suppressor genes including PTPN6 encoding SHP-1 in CML cells. OR21 in combination with imatinib significantly suppressed tumor growth in a xenotransplant model. OR21 and combination therapy decreased the abundance of LSCs and inhibited engraftment in a BCR-ABL1-transduced mouse model. These results demonstrate that targeting DNMT1 using OR21 exerts anti-tumor effects and impairs LSCs in CML. Therefore, combination treatment of TKIs and OR21 represents a promising treatment strategy in CML.
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Affiliation(s)
- Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan; Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan; Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan.
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Nao Yoshida
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan; OHARA Pharmaceutical Co., Ltd, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan; OHARA Pharmaceutical Co., Ltd, Japan
| | - Yoshihiro Hayashi
- Laboratory of Oncology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hideyo Hirai
- Laboratory of Stem Cell Regulation, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Satoshi Yamashita
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Toshikazu Ushijima
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Kumamoto, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan; Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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11
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Ishii K, Okamoto S, Fujita M, Sugihara A, Nagaie T, Nishioka A, Kamachi K, Itamura H, Katsuya H, Yoshimura M, Ureshino H, Ando T, Kubota Y, Kimura S. [HLA-haploidentical peripheral blood stem cell transplantation with post-transplantation cyclophosphamide for adult T-cell leukemia]. Rinsho Ketsueki 2022; 63:333-340. [PMID: 35662154 DOI: 10.11406/rinketsu.63.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Recently, allogeneic peripheral blood stem cell transplantation from human leukocyte antigen (HLA)-haploidentical donors using post-transplantation cyclophosphamide (PTCY-haploPBSCT) has become available in clinical practice. However, the efficacy of PTCY in adult T-cell leukemia (ATL) is not fully established yet. In this study, we retrospectively examined data of seven patients who underwent PTCY-haploPBSCT. The overall survival rate at 100 days after transplantation was 85.7%, and the 1-year overall survival rate was 68.6%. The cumulative incidence of relapse at 1 year was 31.4%, whereas the 1-year nonrelapse mortality was 17.1%. The cumulative incidence of grade III-IV acute graft-versus-host disease (GVHD) on day 100 was 14.3%, and the incidence of chronic GVHD at 1 year was 33.3%. These results suggest that PTCY-haploPBSCT can be a viable option even in patients with ATL. Further accumulation of knowledge and improvement of transplantation outcomes are warranted in the future.
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Affiliation(s)
- Keitaro Ishii
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Sho Okamoto
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Mai Fujita
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Ayano Sugihara
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Toshiaki Nagaie
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Hidekazu Itamura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Hiroo Katsuya
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
- Department of Transfusion Medicine, Saga University Hospital
- Department of Transfusion Medicine and Cell Therapy, Saitama Medical Center, Saitama Medical University
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
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12
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Yoshida-Sakai N, Watanabe T, Yamamoto Y, Ureshino H, Kamachi K, Kurahashi Y, Fukuda-Kurahashi Y, Kimura S. Adult T-cell leukemia-lymphoma acquires resistance to DNA demethylating agents through dysregulation of enzymes involved in pyrimidine metabolism. Int J Cancer 2021; 150:1184-1197. [PMID: 34913485 PMCID: PMC9303000 DOI: 10.1002/ijc.33901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 08/12/2021] [Revised: 11/22/2021] [Accepted: 11/29/2021] [Indexed: 01/05/2023]
Abstract
Adult T-cell leukemia-lymphoma (ATL) is an aggressive neoplasm derived from T-cells transformed by human T-cell lymphotropic virus-1 (HTLV-1). Recently, we reported that regional DNA hypermethylation in HTLV-1-infected T-cells reflects the disease status of ATL and the anti-ATL effects of DNA demethylating agents, including azacitidine (AZA), decitabine (DAC) and a new DAC prodrug, OR-2100 (OR21), which we developed. Here, to better understand the mechanisms underlying drug resistance, we generated AZA-, DAC- and OR21-resistant (AZA-R, DAC-R and OR21-R, respectively) cells from the ATL cell line TL-Om1 and the HTLV-1-infected cell line MT-2 via long-term drug exposure. The efficacy of OR21 was almost the same as that of DAC, indicating that the pharmacodynamics of OR21 were due to release of DAC from OR21. Resistant cells did not show cellular responses observed in parental cells induced by treatment with drugs, including growth suppression, depletion of DNA methyltransferase DNMT1 and DNA hypomethylation. We also found that reduced expression of deoxycytidine kinase (DCK) correlated with lower susceptibility to DAC/OR21 and that reduced expression of uridine cytidine kinase2 (UCK2) correlated with reduced susceptibility to AZA. DCK and UCK2 catalyze phosphorylation of DAC and AZA, respectively; reconstitution of expression reversed the resistant phenotypes. A large homozygous deletion in DCK and a homozygous splice donor site mutation in UCK2 were identified in DAC-R TL-Om1 and AZA-R TL-Om1, respectively. Both genomic mutations might lead to loss of protein expression. Thus, inactivation of UCK2 and DCK might be a putative cause of phenotypes that are resistant to AZA and DAC/OR21, respectively.
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Affiliation(s)
- Nao Yoshida-Sakai
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan.,OHARA Pharmaceutical Co, Ltd, Tokyo, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,OHARA Pharmaceutical Co, Ltd, Tokyo, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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13
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Ureshino H, Kurahashi Y, Watanabe T, Yamashita S, Kamachi K, Yamamoto Y, Fukuda-Kurahashi Y, Yoshida-Sakai N, Hattori N, Hayashi Y, Kawaguchi A, Tohyama K, Okada S, Harada H, Ushijima T, Kimura S. Silylation of Deoxynucleotide Analog Yields an Orally Available Drug with Antileukemia Effects. Mol Cancer Ther 2021; 20:1412-1421. [PMID: 34045225 PMCID: PMC9398096 DOI: 10.1158/1535-7163.mct-20-1125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/15/2021] [Accepted: 05/25/2021] [Indexed: 01/07/2023]
Abstract
DNA methyltransferase inhibitors have improved the prognosis of myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML). However, because these agents are easily degraded by cytidine deaminase (CDA), they must be administered intravenously or subcutaneously. Recently, two orally bioavailable DNA methyltransferase inhibitors, CC-486 and ASTX727, were approved. In previous work, we developed 5-O-trialkylsilylated decitabines that resist degradation by CDA. However, the effects of silylation of a deoxynucleotide analog and enzymatic cleavage of silylation have not been fully elucidated. Enteric administration of OR21 in a cynomolgus monkey model led to high plasma concentrations and hypomethylation, and in a mouse model, oral administration of enteric-coated OR21 led to high plasma concentrations. The drug became biologically active after release of decitabine (DAC) from OR21 following removal of the 5'-O-trisilylate substituent. Toxicities were tolerable and lower than those of DAC. Transcriptome and methylome analysis of MDS and AML cell lines revealed that OR21 increased expression of genes associated with tumor suppression, cell differentiation, and immune system processes by altering regional promoter methylation, indicating that these pathways play pivotal roles in the action of hypomethylating agents. OR21 induced cell differentiation via upregulation of the late cell differentiation drivers CEBPE and GATA-1 Thus, silylation of a deoxynucleotide analog can confer oral bioavailability without new toxicities. Both in vivo and in vitro, OR21 exerted antileukemia effects, and had a better safety profile than DAC. Together, our findings indicate that OR21 is a promising candidate drug for phase I study as an alternative to azacitidine or decitabine.
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Affiliation(s)
- Hiroshi Ureshino
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Satoshi Yamashita
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Kazuharu Kamachi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuta Yamamoto
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Yuki Fukuda-Kurahashi
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Nao Yoshida-Sakai
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Naoko Hattori
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Yoshihiro Hayashi
- Laboratory of Oncology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Atsushi Kawaguchi
- Center for Comprehensive Community Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Kaoru Tohyama
- Department of Laboratory Medicine, Kawasaki Medical School, Kurashiki, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto, Japan
| | - Hironori Harada
- Laboratory of Oncology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Toshikazu Ushijima
- Division of Epigenomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan.,Corresponding Author: Shinya Kimura, Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Saga University School of Medicine, 5-1-1 Nabeshima, Saga 849-8501, Japan. Phone: 81-952-34-2366; Fax: 81-952-34-2017; E-mail:
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14
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Ureshino H, Kamachi K, Nishioka A, Okamoto S, Katsuya H, Yoshimura M, Kubota Y, Ando T, Kimura S. Subsequent attempt tyrosine kinase inhibitor discontinuation in patients with chronic myeloid leukemia; a single institute experience. Hematol Oncol 2021; 39:549-557. [PMID: 34117654 DOI: 10.1002/hon.2896] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 06/01/2021] [Accepted: 06/07/2021] [Indexed: 11/12/2022]
Abstract
Discontinuation of tyrosine kinase inhibitors (TKIs) is now a feasible therapeutic goal for patients with chronic phase chronic myeloid leukemia (CML-CP). Whereas approximately half of patients experience molecular relapse, after resuming with any TKI; the majority re-achieve a deep molecular response (DMR). It is unclear whether such patients who re-achieve a durable DMR can discontinue TKI safely again. Here, we retrospectively assessed first, second, and third attempts to stop TKIs in patients with CML-CP. At the first attempt, 28 out of a total of 53 patients achieved sustained treatment-free remission (TFR; 53.4%; 95% confidence interval [CI], 39.0%-65.9%). Subsequently, 10 of 25 patients attempted a second TKI discontinuation, and in all cases, this was after receiving second-generation TKIs. Four of 10 patients successfully achieved TFR (37.5%; 95% CI, 9.9%-65.9%). All patients who relapsed at the second TKI discontinuation attempt were re-administered TKIs, and soon achieved at least a major molecular remission. All six second relapse patients had a loss of MR4.5 at 3 months after TKI discontinuation. These findings suggest that second and third attempts to successfully stop TKI treatment are feasible in patients with CML-CP.
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Affiliation(s)
- Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Sho Okamoto
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Hiroo Katsuya
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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15
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Kamachi K, Ando T, Tsuruoka N, Hashiguchi M, Kidoguchi K, Kusaba K, Sano H, Sano H, Yamaguchi K, Nishioka A, Yoshimura M, Yokoo M, Kubota Y, Kojima K, Kimura S. Successful Anti-TNF-Alpha Therapy for Crohn's Disease After Allogeneic Stem Cell Transplantation: A Case Report. TOHOKU J EXP MED 2021; 251:81-85. [PMID: 32507783 DOI: 10.1620/tjem.251.81] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Graft-versus-host disease (GVHD) is a potentially life-threatening complication of allogeneic stem cell transplantation (Allo-SCT). Chronic GVHD, which typically presents more than 100 days after Allo-SCT, can resemble manifestations of autoimmune disease; however, there are only a few reports on the development of Crohn's disease (CD) after Allo-SCT. Here, we report a case of steroid-refractory CD after umbilical cord blood transplantation (CBT), which was dramatically improved with administration of anti-tumor necrosis factor-alpha (anti-TNF-alpha) antibodies. A 21-year-old woman with refractory Hodgkin lymphoma underwent CBT and achieved complete remission. About 1 year after CBT, she complained of intermittent abdominal pain and bloody diarrhea, and colonoscopy revealed multiple longitudinal colonic ulcers with a cobblestone appearance; thus, based on the colonoscopy findings, she was diagnosed with CD. We considered a CD-like manifestation of gastrointestinal GVHD and initially administered steroids, but the therapeutic effect was poor. Then, we administered anti-TNF-alpha antibodies, infliximab, and then adalimumab, which resulted in rapid improvement of abdominal symptoms, with no recurrence despite discontinuation of this therapy. Anti-TNF-alpha antibodies are effective for CD after Allo-SCT, which can be considered as a subsequent complication of GVHD.
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Affiliation(s)
- Kazuharu Kamachi
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Toshihiko Ando
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Nanae Tsuruoka
- Department of Gastrointestinal Endoscopy, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Mariko Hashiguchi
- Department of Pathology and Microbiology, Faculty of Medicine, Saga University
| | - Keisuke Kidoguchi
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Kana Kusaba
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Haruna Sano
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Haruhiko Sano
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Kyosuke Yamaguchi
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Atsujiro Nishioka
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Mariko Yoshimura
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Masako Yokoo
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
| | - Yasushi Kubota
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University.,Department of Transfusion Medicine, Saga University Hospital
| | - Kensuke Kojima
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University.,Department of Hematology, Kochi Medical School, Kochi University
| | - Shinya Kimura
- Department of Hematology and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University
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16
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Kamachi K, Ureshino H. Dasatinib-Blinatumomab for Ph-Positive ALL. N Engl J Med 2021; 384:384. [PMID: 33503351 DOI: 10.1056/nejmc2033785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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17
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Ureshino H, Kamachi K, Kimura S. Surrogate Markers for Treatment-Free Remission in Patients With Chronic Myeloid Leukemia. Clin Lymphoma Myeloma Leuk 2020; 20:785-790. [PMID: 32768385 DOI: 10.1016/j.clml.2020.07.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/09/2020] [Accepted: 07/13/2020] [Indexed: 11/27/2022]
Abstract
BCR-ABL1 tyrosine kinase inhibitors (TKIs) improve long-term survival of patients with chronic-phase (CP) chronic myeloid leukemia (CML). Recently, the treatment goal for patients with CML-CP became safe discontinuation of TKIs. Several clinical trials have shown that approximately half of patients who experience a durable deep molecular response during TKI treatment maintain molecular remission after discontinuation of TKIs. However, the factors responsible for successful treatment-free remission (TFR) remain unclear. This study reviews very recent TKI discontinuation studies, focusing on factors responsible for TFR in patients with CML-CP. Longer TKI treatment duration, time of deep molecular response, presence of withdrawal syndrome, deeper molecular response, lower Sokal score, interferon α treatment before TKI administration, and favorable natural killer or T-cell profiles may be associated with TFR. However, different study designs have generated inconsistent data. Further investigations are needed to identify factors that consistently favor achievement of TFR.
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Affiliation(s)
- Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan; Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan; Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan; Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
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18
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Fujita M, Kamachi K, Yokoo M, Kidoguchi K, Kusaba K, Kizuka-Sano H, Yamaguchi K, Nishioka A, Yoshimura M, Kubota Y, Ando T, Kojima K, Kimura S. Accelerated Phase of Atypical Chronic Myeloid Leukemia with Severe Disseminated Intravascular Coagulation at Initial Presentation. Intern Med 2020; 59:1549-1553. [PMID: 32188810 PMCID: PMC7364244 DOI: 10.2169/internalmedicine.4265-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Patients with myelodysplastic syndrome/myeloproliferative neoplasm (MDS/MPN) are often asymptomatic and thus can remain undiagnosed until they become symptomatic due to progression to the accelerated phase (AP) or transformation to acute leukemia (leukemic transformation; LT). We herein report the case of a previously healthy 38-year-old man who had hyperleukocytosis with dysplastic myeloid precursor cells and severe disseminated intravascular coagulation. Hematopoietic recovery with features of atypical chronic myeloid leukemia (aCML) after induction chemotherapy was a diagnostic clue. Although rare, this case highlights the limitation of the diagnostic approach for aCML with AP or LT at the initial presentation.
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MESH Headings
- Adult
- Antineoplastic Agents/therapeutic use
- Disseminated Intravascular Coagulation/complications
- Humans
- Leukemia, Myeloid, Chronic, Atypical, BCR-ABL Negative/complications
- Leukemia, Myeloid, Chronic, Atypical, BCR-ABL Negative/drug therapy
- Leukemia, Myeloid, Chronic, Atypical, BCR-ABL Negative/pathology
- Leukocytosis/complications
- Male
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Affiliation(s)
- Mai Fujita
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Masako Yokoo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Keisuke Kidoguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kana Kusaba
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Haruna Kizuka-Sano
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kyosuke Yamaguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Transfusion Medicine, Saga University Hospital, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kensuke Kojima
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Hematology, Kochi Medical School, Kochi University, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
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19
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Ureshino H, Kamachi K, Kimura S. Does patient sex play a role in treatment-free remission in chronic myeloid leukemia? Int J Hematol 2020; 111:903. [DOI: 10.1007/s12185-020-02864-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/08/2020] [Accepted: 03/11/2020] [Indexed: 11/29/2022]
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20
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Ureshino H, Koarada S, Kamachi K, Yoshimura M, Yokoo M, Kubota Y, Ando T, Ichinohe T, Morio T, Kimura S. Immune dysregulation syndrome with de novo CTLA4 germline mutation responsive to abatacept therapy. Int J Hematol 2020; 111:897-902. [DOI: 10.1007/s12185-020-02834-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/21/2020] [Accepted: 01/21/2020] [Indexed: 02/02/2023]
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21
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Okamoto S, Ureshino H, Kidoguchi K, Kusaba K, Kizuka-Sano H, Sano H, Nishioka A, Yamaguchi K, Kamachi K, Itamura H, Yoshimura M, Yokoo M, Shindo T, Kubota Y, Ando T, Kojima K, Kawaguchi A, Sueoka E, Kimura S. Clinical impact of the CONUT score in patients with multiple myeloma. Ann Hematol 2019; 99:113-119. [PMID: 31768678 DOI: 10.1007/s00277-019-03844-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 11/12/2019] [Indexed: 12/15/2022]
Abstract
Novel anti-myeloma drugs have significantly improved the overall survival (OS) of patients with multiple myeloma (MM). However, not all MM patients treated with these drugs show survival benefits, and biologic and genetic prognostic factors are insufficient to predict the response to treatment. Decreasing treatment-related complications is important to improve the efficacy of treatment in patients with MM. The Controlling Nutritional Status (CONUT) score is a screening method for poor nutritional status, which is associated with poor prognosis in several cancers because it increases the rate of treatment-related complications. We retrospectively analyzed the OS of 64 patients with symptomatic MM and evaluated the correlation between the CONUT score and patient prognosis in MM. The median age at diagnosis was 66 years, and multivariate analysis showed that a high CONUT score (≥ 5; hazard ratio, 3.937; 95% confidence interval, 1.214-12.658; P = 0.022) was an independent prognostic risk factor. Subgroup analysis was performed according to patient age because the choice of treatment strategy, particularly autologous peripheral blood stem cell transplantation (auto-PBSCT), can vary depending on age in MM patients. Younger patients (< 65 years old) who received auto-PBSCT and had a lower CONUT score (0-3) showed a significantly better survival outcome than those with a higher CONUT score (≥ 4) (median OS, not reached vs. 64.1 months; P = 0.011). The CONUT score is simple to calculate and provides a useful prognostic indicator in patients with MM, especially transplant-eligible patients.
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Affiliation(s)
- Sho Okamoto
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.,Department of Internal Medicine, Saga-ken Medical Centre Koseikan, Saga, Japan
| | - Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan. .,Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan.
| | - Keisuke Kidoguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Kana Kusaba
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Haruna Kizuka-Sano
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Haruhiko Sano
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Kyosuke Yamaguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Hidekazu Itamura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Masako Yokoo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Takero Shindo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.,Department of Hematology and Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Kensuke Kojima
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan
| | - Atsushi Kawaguchi
- Center for Comprehensive Community Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Eisaburo Sueoka
- Department of Clinical Laboratory Medicine, Faculty of Medicine, Saga University, Saga, Japan.,Department of Laboratory Medicine, Saga University Hospital, Saga, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, 5-1-1 Nabeshima, Saga, 849-8501, Japan.,Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Saga, Japan
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22
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Ureshino H, Kamachi K, Kimura S. Japan's high-cost medical expense benefit system could be an obstacle to promoting generic imatinib. Lancet Haematol 2019; 6:e498. [PMID: 31561857 DOI: 10.1016/s2352-3026(19)30168-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Affiliation(s)
- Hiroshi Ureshino
- Department of Drug Discovery and Biochemical Sciences, Department of Internal Medicine, Faculty of Medicine Saga University, Saga 849-8501, Japan; Division of Hematology, Respiratory Medicine, and Oncology, Department of Internal Medicine, Faculty of Medicine Saga University, Saga 849-8501, Japan.
| | - Kazuharu Kamachi
- Department of Drug Discovery and Biochemical Sciences, Department of Internal Medicine, Faculty of Medicine Saga University, Saga 849-8501, Japan; Division of Hematology, Respiratory Medicine, and Oncology, Department of Internal Medicine, Faculty of Medicine Saga University, Saga 849-8501, Japan
| | - Shinya Kimura
- Department of Drug Discovery and Biochemical Sciences, Department of Internal Medicine, Faculty of Medicine Saga University, Saga 849-8501, Japan; Division of Hematology, Respiratory Medicine, and Oncology, Department of Internal Medicine, Faculty of Medicine Saga University, Saga 849-8501, Japan
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23
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Kamachi K, Kubota Y, Nagaie T, Yamaguchi K, Ogusu S, Kidoguchi K, Kusaba K, Kizuka-Sano H, Nishioka A, Yoshimura M, Yokoo M, Ando T, Kai K, Kojima K, Ohshima K, Sueoka E, Kimura S. Primary Chest Wall MYC/BCL6 Double-hit Lymphoma with t (3;7) (q27;p12) and t (8;14) (q24;q32) Translocations. Intern Med 2019; 58:2073-2077. [PMID: 30918199 PMCID: PMC6702014 DOI: 10.2169/internalmedicine.2532-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Primary chest wall lymphoma is rare and typically associated with chronic pleural inflammation. Double-hit lymphoma (DHL), which is defined as aggressive mature B-cell lymphoma with MYC and BCL2 or BCL6 rearrangements, is a highly aggressive malignancy that tends to have extranodal involvement and is resistant to standard immunochemotherapy. We herein report a 55-year-old man with no history of chronic pleural inflammation, diagnosed with primary chest wall DHL with MYC/BCL6 rearrangement, and harboring a unique BCL6 translocation, t (3;7) (q27;p12). After six courses of intensive chemotherapy, he has achieved complete remission. To our knowledge, this is the first case report of primary chest wall DHL.
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Affiliation(s)
- Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Transfusion Medicine, Saga University Hospital, Japan
| | - Toshiaki Nagaie
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kyosuke Yamaguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Shinsuke Ogusu
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Keisuke Kidoguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kana Kusaba
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Haruna Kizuka-Sano
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Mariko Yoshimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Masako Yokoo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Keita Kai
- Department of Pathology, Saga University Hospital, Japan
| | - Kensuke Kojima
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Koichi Ohshima
- Department of Pathology, Kurume University School of Medicine, Japan
| | - Eisaburo Sueoka
- Department of Transfusion Medicine, Saga University Hospital, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
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24
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Ureshino H, Kamachi K, Kimura S. Mogamulizumab for the Treatment of Adult T-cell Leukemia/Lymphoma. Clin Lymphoma Myeloma Leuk 2019; 19:326-331. [PMID: 30981611 DOI: 10.1016/j.clml.2019.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/24/2019] [Accepted: 03/01/2019] [Indexed: 12/22/2022]
Abstract
Mogamulizumab, a defucosylated humanized monoclonal antibody against the C-C chemokine receptor 4 (CCR4), has been approved for the treatment of relapsed adult T-cell leukemia/lymphoma (ATL). Compared with conventional chemotherapy, mogamulizumab monotherapy displayed more efficacy in relapsed ATL, making mogamulizumab a promising therapeutic agent. However, mogamulizumab could increase graft-versus-host disease, resulting in poor survival outcome in the allogenic stem cell transplant (allo-SCT) setting. It is possible that the efficacy of mogamulizumab could be established by the occurrence of skin rashes and/or CCR4 mutational status. Hence, this study reviews the current treatment strategies for patients with ATL and focuses on the safety and efficacy (single-agent and combined with chemotherapy or allo-SCT) of mogamulizumab.
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Affiliation(s)
- Hiroshi Ureshino
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine Saga University, Saga, Japan; Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine Saga University, Saga, Japan.
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine Saga University, Saga, Japan; Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine Saga University, Saga, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine Saga University, Saga, Japan; Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine Saga University, Saga, Japan
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25
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Kamachi K, Shindo T, Miyahara M, Kitaura K, Akashi M, Shin-I T, Suzuki R, Oshima K, Kimura S. Epstein-Barr virus-related diffuse large B-cell lymphoma in mogamulizumab-treated adult T-cell leukemia with incomplete T-cell reconstitution. Int J Hematol 2018; 109:221-227. [PMID: 30368656 DOI: 10.1007/s12185-018-2552-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 10/20/2018] [Accepted: 10/22/2018] [Indexed: 11/24/2022]
Abstract
Adult T-cell leukemia (ATL) is an aggressive mature T-cell malignancy with a poor prognosis. The anti-C-C motif chemokine receptor 4 (CCR4) antibody mogamulizumab (moga) reduces ATL cells and induces reconstitution of polyclonal T cells; however, ATL cases often remain resistant and moga sometimes causes fatal immunopathology. Epstein-Barr virus (EBV)-related B-cell lymphoma develops in severely immunocompromised subjects, and is particularly associated with impaired T-cell immunity. Here, we report an ATL patient who had received conventional chemotherapy plus moga, and subsequently developed EBV-related diffuse large B-cell lymphoma (DLBCL) of the central nervous system. Next-generation sequencing-based T-cell receptor repertoire analyses identified residual abnormal clones and revealed that reconstitution of polyclonal T cells was incomplete, even after moga treatment. Furthermore, a skin rash that developed after moga treatment was found to contain ATL clones. This case suggests that the limited therapeutic effects of moga and incomplete T-cell reconstitution are associated with severely impaired T-cell immunity and subsequent development of EBV-related DLBCL.
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Affiliation(s)
- Kazuharu Kamachi
- Department of Internal Medicine, Karatsu Red Cross Hospital, Karatsu, Japan.,Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
| | - Takero Shindo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan. .,Department of Hematology/Oncology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogo-in, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Masaharu Miyahara
- Department of Internal Medicine, Karatsu Red Cross Hospital, Karatsu, Japan
| | | | - Michiaki Akashi
- Department of Pathology, Karatsu Red Cross Hospital, Karatsu, Japan
| | | | - Ryuji Suzuki
- Repertoire Genesis Inc, Ibaraki, Japan.,Department of Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, Sagamihara, Japan
| | - Koichi Oshima
- Department of Pathology, Kurume University School of Medicine, Kurume, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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26
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Kitamura H, Kubota Y, Yamaguchi K, Kamachi K, Nishioka A, Yokoo M, Shindo T, Ando T, Kojima K, Kimura S. Successful Autologous Hematopoietic Stem Cell Transplantation Followed by Bortezomib Maintenance in a Patient with Relapsed CD138-low Multiple Solitary Plasmacytomas Harboring a 17p Deletion. Intern Med 2018; 57:855-860. [PMID: 29151530 PMCID: PMC5891527 DOI: 10.2169/internalmedicine.9446-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Solitary bone plasmacytoma (SBP) tends to progress to multiple myeloma (MM); however, progression to multiple solitary plasmacytomas (MSP) is rare. We report a case of CD138-low MSP with 17p deletion in a patient with relapsed SBP. 17p deletion is associated with a poor outcome in patients with MM, and the low expression of CD138 in myeloma cells is associated with drug resistance and a poor prognosis. The patient was successfully treated with bortezomib plus dexamethasone induction therapy and autologous hematopoietic stem cell transplantation followed by bortezomib maintenance therapy. Consequently, bortezomib treatment was stopped and a stringent complete response has been maintained.
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Affiliation(s)
- Hiroaki Kitamura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Yasushi Kubota
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
- Department of Transfusion Medicine, Saga University Hospital, Japan
| | - Kyosuke Yamaguchi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Atsujiro Nishioka
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Masako Yokoo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Takero Shindo
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Toshihiko Ando
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Kensuke Kojima
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
| | - Shinya Kimura
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Japan
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27
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Shindo T, Kitaura K, Ureshino H, Kamachi K, Miyahara M, Doi K, Watanabe T, Sueoka E, Shin-I T, Suzuki R, Kimura S. Deep sequencing of the T cell receptor visualizes reconstitution of T cell immunity in mogamulizumab-treated adult T cell leukemia. Oncoimmunology 2017; 7:e1405204. [PMID: 29399406 DOI: 10.1080/2162402x.2017.1405204] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/26/2017] [Accepted: 11/09/2017] [Indexed: 10/18/2022] Open
Abstract
Although the anti-CCR4 antibody mogamulizumab (moga) shows striking antitumor activity against adult T cell leukemia (ATL), it can also cause fatal immunological pathology such as severe skin rash and graft-versus-host disease, which might be attributed to depletion of CCR4+ regulatory T cells. We previously showed that next generation sequencing enables precise analysis of the T cell receptor (TCR) repertoire, and we here used the technique to reveal the immunological dynamics in moga-treated ATL patients. Treatment with moga resulted in remarkable reduction or elimination of clonal cells, and enhanced reconstitution of non-tumor polyclonal CD4+ T cells and oligoclonal CD8+ T cells. Interestingly, cutaneous T cells infiltrating moga-related skin rashes did not share the same major clones in peripheral blood, which minimizes the possibility of cross-reaction. Thus, deep sequencing of the TCR can reveal the immune reconstitution of moga-treated ATL and provides powerful insights into its mode of action.
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Affiliation(s)
- Takero Shindo
- Department of Hematology, Respiratory Medicine and Oncology, Saga University School of Medicine, Saga, Japan.,Department of Hematology/Oncology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | - Hiroshi Ureshino
- Department of Hematology, Respiratory Medicine and Oncology, Saga University School of Medicine, Saga, Japan
| | - Kazuharu Kamachi
- Department of Internal Medicine, Karatsu Red Cross Hospital, Karatsu, Japan
| | - Masaharu Miyahara
- Department of Internal Medicine, Karatsu Red Cross Hospital, Karatsu, Japan
| | - Kazuko Doi
- Department of Dermatology, Karatsu Red Cross Hospital, Karatsu, Japan
| | - Tatsuro Watanabe
- Department of Laboratory Medicine, Saga University Hospital, Saga, Japan
| | - Eisaburo Sueoka
- Department of Laboratory Medicine, Saga University Hospital, Saga, Japan.,Department of Clinical Laboratory Medicine, Saga University School of Medicine, Saga, Japan
| | | | - Ryuji Suzuki
- Repertoire Genesis, Inc., Ibaraki, Japan.,Department of Clinical Immunology, Clinical Research Center for Allergy and Rheumatology, Sagamihara National Hospital, Sagamihara, Japan
| | - Shinya Kimura
- Department of Hematology, Respiratory Medicine and Oncology, Saga University School of Medicine, Saga, Japan
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28
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Kamachi K, Ozawa S, Hayashi T, Kazuno A, Ito E, Makuuchi H. Impact of body mass index on postoperative complications and long-term survival in patients with esophageal squamous cell cancer. Dis Esophagus 2016; 29:229-35. [PMID: 25789403 DOI: 10.1111/dote.12327] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Undernutrition and cachexia have been suggested to be risk factors for postoperative complications and survival in cancer patients. The aim of this study was to investigate whether body mass index (BMI) is related to the short-term and long-term outcomes in patients who undergo an esophagectomy for the resection of esophageal squamous cell cancer (ESCC). Three hundred forty patients who underwent an esophagectomy for the resection of ESCC between 2003 and 2008 were retrospectively reviewed. The patients were divided into two groups: an L-BMI group characterized by a BMI < 18.5 kg/m(2) and an N-BMI group characterized by a BMI ≥ 18.5 kg/m(2). Clinical and pathological outcome were compared between groups. The study included 40 patients in the L-BMI group and 300 patients in the N-BMI group. A clinicopathological assessment showed that nodal involvement was seen more frequently in the L-BMI group (P = 0.016). Pulmonary complications seemed to occur more frequently in the L-BMI group (P = 0.006). The 5-year overall survival rate was higher in the N-BMI group (63.6%) than in the L-BMI group (32.3%) (P < 0.001). The 5-year disease-free survival rate was also higher in the N-BMI group (58.0%) than in the L-BMI group (33.6%) (P = 0.001). In multivariate analysis, the BMI (hazard ratio, 2.154; 95% CI, 1.349-3.440, P = 0.001) was found to be an independent prognostic factor for overall survival. Our data suggested that a lower BMI not only increased pulmonary complications but also impaired overall and disease-free survival after an esophagectomy for the resection of ESCC.
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Affiliation(s)
- K Kamachi
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Kanagawa, Japan
| | - S Ozawa
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Kanagawa, Japan
| | - T Hayashi
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Kanagawa, Japan
| | - A Kazuno
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Kanagawa, Japan
| | - E Ito
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Kanagawa, Japan
| | - H Makuuchi
- Department of Gastroenterological Surgery, Tokai University School of Medicine, Kanagawa, Japan
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29
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Kamachi K, Fukushima N, Ando T, Sato KI, Ohshima K, Yokoo M, Shindo T, Kubota Y, Kojima K, Kimura S. Coexistence of ALK-anaplastic large cell lymphoma and CD4+ T cell large granular lymphocytic leukemia. Ann Hematol 2014; 94:539-40. [PMID: 25100004 DOI: 10.1007/s00277-014-2176-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 07/24/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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Kamachi K, Kojima K, Nishijima A, Takeshita M, Ando T, Kimura S. Small lymphocytic lymphoma presenting as bulky renal incidentaloma. Int J Hematol 2014; 100:107-8. [PMID: 24928522 DOI: 10.1007/s12185-014-1609-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 05/28/2014] [Accepted: 05/28/2014] [Indexed: 11/30/2022]
MESH Headings
- Antibodies, Monoclonal, Murine-Derived/therapeutic use
- Antineoplastic Agents/therapeutic use
- Cyclophosphamide/therapeutic use
- Humans
- Kidney/diagnostic imaging
- Kidney/drug effects
- Kidney/pathology
- Kidney Neoplasms/diagnosis
- Kidney Neoplasms/diagnostic imaging
- Kidney Neoplasms/drug therapy
- Kidney Neoplasms/pathology
- Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis
- Leukemia, Lymphocytic, Chronic, B-Cell/diagnostic imaging
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Magnetic Resonance Imaging
- Male
- Middle Aged
- Rituximab
- Tomography, X-Ray Computed
- Vidarabine/analogs & derivatives
- Vidarabine/therapeutic use
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Affiliation(s)
- Kazuharu Kamachi
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine, Faculty of Medicine, Saga University, Saga, Japan
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Yoshihara M, Itamura H, Fukushima N, Itoh M, Furukawa K, Nagatomo D, Kamachi K, Kitamura H, Shindo T, Kubota Y, Sueoka E, Morita S, Ichinohe T, Kimura S. Therapeutic management in cardiac lymphoma. Leuk Lymphoma 2013; 55:1215-7. [PMID: 23885797 DOI: 10.3109/10428194.2013.828355] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Mari Yoshihara
- Division of Hematology, Respiratory Medicine and Oncology, Department of Internal Medicine
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32
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Nakamura Y, Kamachi K, Toyoizumi-Ajisaka H, Otsuka N, Saito R, Tsuruoka J, Katsuta T, Nakajima N, Okada K, Kato T, Arakawa Y. Marked difference between adults and children in Bordetella pertussis DNA load in nasopharyngeal swabs. Clin Microbiol Infect 2011; 17:365-70. [PMID: 20456454 DOI: 10.1111/j.1469-0691.2010.03255.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Bordetella pertussis is the aetiologic agent of whooping cough, a common cause of severe respiratory illness in children and prolonged mild cough in adults. To understand some of the reasons for differences in clinical symptoms between adults and children, we measured B. pertussis DNA loads in nasopharyngeal swabs (NPS) from 19 adults and 40 children (including 14 infants) by quantitative IS481 real-time PCR. All cases had been pre-diagnosed with the B. pertussis-specific loop-mediated isothermal amplification method. The mean PCR threshold cycles for adult and child NPS were 34.9 and 27.1, respectively, indicating a significantly lower B. pertussis DNA load in adults than in children (p <0.001). Moreover, adults had very low DNA loads during both early and later stages of the disease. When corresponding bacterial loads in NPS were calculated for B. pertussis Tohama cells using a standard curve, the mean number of bacterial cells taken with a rayon-tipped swab from an adult, older child and infant was estimated to be 320 (95% CI 120-910), 2.1 × 10⁴(95% CI 5.3 × 10³ to 8.3 × 10⁴) and 1.1 × 10⁶ cells (95% CI 1.2 × 10⁵ to 8.9 × 10⁶), respectively. This indicates that the B. pertussis load in NPS is closely correlated with patient age. Our observations suggest that adult pertussis is characterized by a lower bacterial load in the nasopharynx, resulting in milder symptoms and negative cultures.
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Affiliation(s)
- Y Nakamura
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan.
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33
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Guiso N, Boursaux-Eude C, Weber C, Hausman SZ, Sato H, Iwaki M, Kamachi K, Konda T, Burns DL. Analysis of Bordetella pertussis isolates collected in Japan before and after introduction of acellular pertussis vaccines. Vaccine 2001; 19:3248-52. [PMID: 11312021 DOI: 10.1016/s0264-410x(01)00013-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Because of recent concern that whole-cell pertussis vaccination can drive antigenic divergence of circulating isolates of Bordetella pertussis, we compared 12 clinical isolates of B. pertussis collected in Japan, the first country to introduce acellular pertussis vaccines, with the vaccine strain. We used pulsed-field gel electrophoresis, sequencing of ptx and prn genes and expression of fimbriae. Most of the isolates collected before or after introduction of acellular vaccine possess similar restriction patterns. They contain ptx genes and prn alleles similar to the vaccine strain and to European isolates collected before the introduction of vaccination. Two recently collected isolates exhibiting a different pulsed-field gel electrophoresis pattern possess ptxS1 and prn alleles similar to the alleles harbored by European isolates circulating currently. Our preliminary results suggest that, if acellular pertussis vaccine-induced antigenic divergence exists, it is likely to be a slow or rare process.
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MESH Headings
- Antigenic Variation
- Antigens, Bacterial/genetics
- Antigens, Bacterial/isolation & purification
- Bordetella pertussis/genetics
- Bordetella pertussis/immunology
- Bordetella pertussis/isolation & purification
- DNA, Bacterial/genetics
- DNA, Bacterial/isolation & purification
- Electrophoresis, Gel, Pulsed-Field
- Europe
- Genes, Bacterial
- Humans
- Japan
- Pertussis Vaccine/immunology
- Pertussis Vaccine/pharmacology
- Selection, Genetic
- Vaccines, Acellular/immunology
- Vaccines, Acellular/pharmacology
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Affiliation(s)
- N Guiso
- Unité des Bordetella, Centre National de Référence des Bordetelles, Institut Pasteur, Paris, France.
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Kurokawa H, Yagi T, Shibata N, Shibayama K, Kamachi K, Arakawa Y. A new SHV-derived extended-spectrum beta-lactamase (SHV-24) that hydrolyzes ceftazidime through a single-amino-acid substitution (D179G) in the -loop. Antimicrob Agents Chemother 2000; 44:1725-7. [PMID: 10817740 PMCID: PMC89944 DOI: 10.1128/aac.44.6.1725-1727.2000] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A new SHV-derived extended-spectrum beta-lactamase (SHV-24) conferring high-level resistance to ceftazidime but not cefotaxime and cefazolin was identified in Japan. This enzyme was encoded by a transferable 150-kb plasmid from an Escherichia coli clinical isolate. The pI and K(m) for CAZ of this enzyme were 7.5 and 30 microM, respectively. SHV-24 was found to have a D179G substitution in the Omega-loop of the enzyme.
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Affiliation(s)
- H Kurokawa
- Department of Bacterial and Blood Products, National Institute of Infectious Diseases, Tokyo, Japan
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Abstract
The internalization of the N-terminal catalytic domain of Bordetella pertussis adenylate cyclase toxin (ACT) across the cytoplasmic membrane has been considered to occur independently from protein-protein interactions which can lead to oligomerization required for hemolytic activity by its C-terminal hemolysin domain. Here we report that when added in excess, this hemolysin domain stimulates the internalization, suggesting the involvement of protein-protein interactions in cell-invasive activity of ACT, as well as its hemolytic activity.
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Affiliation(s)
- M Iwaki
- Department of Bacterial and Blood Products, National Institute of Infectious Diseases, Musashimurayama-shi, Tokyo 208-0011, Japan.
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Abstract
The effect of Bordetella pertussis adenylate cyclase toxin (ACT) on platelet aggregation was investigated. This cell-invasive adenylate cyclase completely suppressed ADP (10 microM)-induced aggregation of rabbit platelets at 3 micrograms/ml and strongly suppressed thrombin (0. 2 U/ml)-induced aggregation at 10 micrograms/ml. The suppression was accompanied by marked increase in platelet intracellular cyclic AMP (cAMP) content and was diminished by the anti-ACT monoclonal antibody B7E11. A catalytically inactive point mutant of ACT did not show the suppressive effect. Since an increase of cAMP content is a known cause of platelet dysfunction, these results indicate that the observed platelet inactivation was due to the catalytic activity of ACT through increase of intracellular cAMP.
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Affiliation(s)
- M Iwaki
- Department of Bacterial and Blood Products, National Institute of Infectious Diseases, Musashimurayama-shi, Tokyo 208-0011, Japan.
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Sakurai S, Kamachi K, Konda T, Komuro K, Uchida T. IFN-gamma-mediated protection against intracerebral challenge with Bordetella pertussis in mice. Jpn J Med Sci Biol 1997; 50:35-43. [PMID: 9354968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Mice inoculated with whole cell pertussis vaccine (WCV) acquired protection against intracerebral challenge with Bordetella pertussis without any appreciable antibody production against pertussis toxin or filamentous hemagglutinin. Spleen cells from mice immunized with WCV produced a significant amount of IFN-gamma upon stimulation in vitro with WCV. Furthermore, mice inoculated with recombinant IFN-gamma along with a suboptimal dose of WCV survived longer than those that received WCV alone. These results suggest that, in WCV-immune mice, IFN-gamma plays an important role in protection against intracerebral challenge with B. pertussis.
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Affiliation(s)
- S Sakurai
- Department of Bacterial and Blood Products, National Institute of Health, Tokyo
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Sakurai S, Kamachi K, Konda T, Miyajima N, Kohase M, Yamamoto S. Nitric oxide induction by pertussis toxin in mouse spleen cells via gamma interferon. Infect Immun 1996; 64:1309-13. [PMID: 8606094 PMCID: PMC173919 DOI: 10.1128/iai.64.4.1309-1313.1996] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
We examined the major pathogenic substances of Bordetella pertussis for the ability to induce nitric oxide, and important biological function of macrophages, via gamma interferon in spleen cells. B. pertussis, which produces a variety of pathogenic substances, including pertussis toxin and filamentous hemagglutinin, causes a severe respiratory disease. Nitric oxide was detected in the culture fluid of spleen cells stimulated with pertussis toxin or its B oligomer but not in the culture fluid of spleen cells stimulated with the A protomer of pertussis toxin or with filamentous hemagglutinin. Incubation of the peritoneal exudate macrophages with pertussis toxin, B oligomer, A protomer, or filamentous hemagglutinin induced little nitric oxide, whereas incubation with gamma interferon induced a significant amount of nitric oxide. The induction of nitric oxide in spleen cells stimulated with pertussis toxin was completely inhibited by anti-gamma interferon antibody. The treatment of spleen cells with anti-Thy-1.2 antibody plus complement followed by stimulation with pertussis toxin decreased the secretion of gamma interferon and nitric oxide. These results suggest that gamma interferon from T lymphocytes stimulated with pertussis toxin induces nitric oxide.
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Affiliation(s)
- S Sakurai
- Department of Bacterial and Blood Products, National Institute of Health, Tokyo, Japan
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Yamaya T, Hayakawa T, Tanasawa K, Kamachi K, Mae T, Ojima K. Tissue Distribution of Glutamate Synthase and Glutamine Synthetase in Rice Leaves : Occurrence of NADH-Dependent Glutamate Synthase Protein and Activity in the Unexpanded, Nongreen Leaf Blades. Plant Physiol 1992; 100:1427-32. [PMID: 16653141 PMCID: PMC1075802 DOI: 10.1104/pp.100.3.1427] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
To further explore the function of NADH-dependent glutamate synthase (GOGAT), the tissue distribution of NADH-GOGAT protein and activity was investigated in rice (Oryza sativa L.) leaves. The distributions of ferredoxin (Fd)-dependent GOGAT, plastidic glutamine synthetase, and cytosolic glutamine synthetase proteins were also determined in the same tissues. High levels of NADH-GOGAT protein (33.1 mug protein/g fresh weight) and activity were detected in the 10th leaf blade before emergence. The unexpanded, nongreen portion of the 9th leaf blade contained more than 50% of the NADH-GOGAT protein and activity per gram fresh weight when compared with the 10th leaf. The expanding, green portion of the 9th leaf blade outside of the sheath contained a slightly lower abundance of NADH-GOGAT protein than the nongreen portion of the 9th blade on a fresh weight basis. The fully expanded leaf blades at positions lower than the 9th leaf had decreased NADH-GOGAT levels as a function of increasing age, and the oldest, 5th blade contained only 4% of the NADH-GOGAT protein compared with the youngest 10th leaf blade. Fd-GOGAT protein, on the other hand, was the major form of GOGAT in the green tissues, and the highest amount of Fd-GOGAT protein (111 mug protein/g fresh weight) was detected in the 7th leaf blade. In the nongreen 10th leaf blade, the content of Fd-GOGAT protein was approximately 7% of that found in the 7th leaf blade. In addition, the content of NADH-GOGAT protein in the 10th leaf blade was about 4 times higher than that of Fd-GOGAT protein. The content of plastidic glutamine synthetase polypeptide was also the highest in the 7th leaf blade (429 mug/g fresh weight) and lowest in nongreen blades and sheaths. On the other hand, the relative abundance of the cytosolic glutamine synthetase polypeptide was the highest in the oldest leaf blade, decreasing to 10 to 20% of that value in young, nongreen leaves. These results suggest that NADH-GOGAT is important for the synthesis of glutamate from the glutamine that is transported from senescing source tissues through the phloem in the nongreen sink tissues in rice leaves.
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Affiliation(s)
- T Yamaya
- Laboratory of Plant Cell Engineering, Department of Applied Biological Chemistry, Faculty of Agriculture, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-Ku, Sendai 981, Japan
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Kamachi K, Yamaya T, Hayakawa T, Mae T, Ojima K. Vascular bundle-specific localization of cytosolic glutamine synthetase in rice leaves. Plant Physiol 1992; 99:1481-6. [PMID: 16669062 PMCID: PMC1080651 DOI: 10.1104/pp.99.4.1481] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Tissue localizations of cytosolic glutamine synthetase (GS1; EC 6.3.1.2), chloroplastic GS (GS2), and ferredoxin-dependent glutamate synthase (Fd-GOGAT; EC 1.4.7.1) in rice (Oryza sativa L.) leaf blades were investigated using a tissue-print immunoblot method with specific antibodies. The cross-sections of mature and senescent leaf blades from middle and basal regions were used for tissue printing. The anti-GS1 antibody, raised against a synthetic 17-residue peptide corresponding to the deduced N-terminal amino acid sequence of rice GS1, cross-reacted specifically with native GS1 protein, but not with GS2 after transfer onto a nitrocellulose membrane. Tissue-print immunoblots showed that the GS1 protein was located in large and small vascular bundles in all regions of the leaf blade prepared from either stage of maturity. On the other hand, GS2 and Fd-GOGAT proteins were mainly located in mesophyll cells. The intensity of the developed color on the membrane for GS1 was similar between the two leaf ages, whereas that for GS2 and Fd-GOGAT decreased during senescence. The tissue-specific localization of GS1 suggests that this GS isoform is important in the synthesis of glutamine, which is a major form of nitrogen exported from the senescing leaf in rice plants.
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Affiliation(s)
- K Kamachi
- Laboratory of Plant Nutrition, Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-Ku, Sendai 981, Japan
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Kamachi K, Yamaya T, Hayakawa T, Mae T, Ojima K. Changes in Cytosolic Glutamine Synthetase Polypeptide and its mRNA in a Leaf Blade of Rice Plants during Natural Senescence. Plant Physiol 1992; 98:1323-9. [PMID: 16668795 PMCID: PMC1080352 DOI: 10.1104/pp.98.4.1323] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Changes in the levels of cytosolic glutamine synthetase (GS1) and chloroplastic glutamine synthetase (GS2) polypeptides and of their corresponding mRNAs have been investigated in segments of the 13th leaf of hydroponically grown rice (Oryza sativa L.) plants during natural senescence. The leaf blade on the main stem at early (0 day), middle (15 days), and late (25 days) stages of senescence was harvested and cut into 18 or 19 segments, 2 centimeters in length from the base to the tip. The amount of GS1 polypeptide, detected with specific antibody for the GS1, was greatest near the middle of the leaf blade (segments 11-13). There was little difference in the GS1 content between corresponding leaf segments obtained at the early and middle stages of senescence. At the late senescence stage, all segments had lost some GS1 polypeptide, but more than 50% of GS1 detected at both the early and middle stages was still detectable in segments. The relative content of mRNA for GS1 in the total RNA in all segments was very low during early senescence but increased in all leaf segments during later senescence. At the late stage of senescence, GS1 mRNA in the total RNA increased about 4.2- to 4.6-fold in segments 12 to 16 in the day-25 samples compared with those in the early stage. The content of the GS2 polypeptide, as well as ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) protein, was highest in segment 17 in the 0-day samples. During senescence, this peak became lower and broader, and finally disappeared, i.e. approximately 80% of GS2 polypeptide and Rubisco protein in segment 17 were lost by day 25. In contrast with GS2 polypeptide, the relative level of GS2 mRNA increased 1.8- to 2.9-fold in individual segments at the middle stage of senescence. Even at the late stage, the transcript signals remained slightly higher than those at the early stage in all segments. Thus, GS1 and GS2 polypeptides and corresponding mRNAs responded in a different manner within an attached rice leaf during natural senescence. The contents of GS1 and GS2 polypeptides were not simply determined by the abundance of their corresponding mRNAs in the rice leaf blades during natural senescence.
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Affiliation(s)
- K Kamachi
- Laboratory of Plant Nutrition, Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-Ku, Sendai 981, Japan
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Hayakawa T, Yamaya T, Kamachi K, Ojima K. Purification, Characterization, and Immunological Properties of NADH-Dependent Glutamate Synthase from Rice Cell Cultures. Plant Physiol 1992; 98:1317-22. [PMID: 16668794 PMCID: PMC1080351 DOI: 10.1104/pp.98.4.1317] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
To obtain a monospecific antibody against NADH-dependent glutamate synthase (NADH-GOGAT; EC 1.4.1.14), the enzyme was purified to homogeneity from cultured rice cells (Oryza sativa) with column chromatography using Butyl Toyopearl 650M, Sephacryl S-300, Blue Sepharose CL-6B, and Butyl Toyopearl 650S. The specific activity at the final stage of the purification was 9.8 micromoles of glutamate formed per minute per milligram of protein. The yield was 6.1% and purification was 815-fold. Analysis by denaturing gel electrophoresis revealed a single polypeptide with an apparent molecular weight of 196,000, similar to the value of 194,000 estimated for the native protein. Apparent K(m) values for l-glutamine, 2-oxoglutarate, and NADH were 811, 76, and 3.0 micromolar, respectively. Neither NADPH nor l-asparagine substituted for NADH and l-glutamine, respectively. The enzyme had its absorption maxima at 273, 373, and 440 nanometers with a shoulder at 475 nanometers, suggesting that the rice NADH-GOGAT is a flavoprotein. Monospecific antibody raised against NADH-GOGAT purified from the rice cells was obtained as the first instance for the enzyme in higher plants. Immunological analyses showed that the antibody for rice cell NADH-GOGAT reacted with only the enzyme in extracts from the cells. The anti-NADH-GOGAT antibody did not recognize the ferredoxin-GOGAT purified from rice leaves, and likewise the anti-rice leaf ferredoxin-GOGAT antibody did not react with the NADH-GOGAT purified from the cultured rice cells.
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Affiliation(s)
- T Hayakawa
- Laboratory of Plant Nutrition, Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-Ku, Sendai 981, Japan
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Kamachi K, Yamaya T, Mae T, Ojima K. A Role for Glutamine Synthetase in the Remobilization of Leaf Nitrogen during Natural Senescence in Rice Leaves. Plant Physiol 1991; 96:411-7. [PMID: 16668201 PMCID: PMC1080785 DOI: 10.1104/pp.96.2.411] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Changes in the levels of cytosolic glutamine synthetase (GS1) and chloroplastic glutamine synthetase (GS2) polypeptides and of corresponding mRNAs were determined in leaves of hydroponically grown rice (Oryza sativa) plants during natural senescence. The plants were grown in the greenhouse for 105 days at which time the thirteenth leaf was fully expanded. This was counted as zero time for senescence of the twelfth leaf. The twelfth leaf blade on the main stem was analyzed over a time period of -7 days (98 days after germination) to +42 days (147 days after germination). Total GS activity declined to less than a quarter of its initial level during the senescence for 35 days and this decline was mainly caused by a decrease in the amount of GS2 polypeptide. Immunoblotting analyses showed that contents of other chloroplastic enzymes, such as ribulose-1,5-bisphosphate carboxylase/oxygenase and Fd-glutamate synthase, declined in parallel with GS2. In contrast, the GS1 polypeptide remained constant throughout the senescence period. Translatable mRNA for GS1 increased about fourfold during the senescence for 35 days. During senescence, there was a marked decrease in content of glutamate (to about one-sixth of the zero time value); glutamate is the major form of free amino acid in rice leaves. Glutamine, the major transported amino acid, increased about threefold compared to the early phase of the harvest in the senescing rice leaf blades. These observations suggest that GS1 in senescing leaf blades is responsible for the synthesis of glutamine, which is then transferred to the growing tissues in rice plants.
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Affiliation(s)
- K Kamachi
- Laboratory of Plant Nutrition, Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-Ku Sendai, Miyagi 981, Japan
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Hovell MF, Black DR, Mewborn CR, Geary D, Agras WS, Kamachi K, Kirk R, Walton C, Dawson S. Personalized versus usual care of previously uncontrolled hypertensive patients: an exploratory analysis. Prev Med 1986; 15:673-84. [PMID: 3797398 DOI: 10.1016/0091-7435(86)90072-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This study was conducted to explore whether the quality of provider care may contribute to blood pressure reduction and whether other factors related to the treatment of hypertension may explain decline in blood pressure. In the study, 46 uncontrolled (greater than or equal to 140/90 mm Hg), medically treated hypertensive patients who received more personalized care differed significantly in the magnitude of blood pressure reduction from 36 usual-care patients (10/7 vs 2/2 mm Hg means for systolic and diastolic blood pressure reduction, respectively). About twice as many experimental patients as controls were reclassified as having "controlled" blood pressure, and this difference reached statistical significance. A multiple regression analysis for personalized-care subjects showed that no dynamic variables were related to blood pressure changes. It was postulated that more personalized care may have accounted for the significant difference between groups in blood pressure reduction. Similar personalized monitoring services might be important additions to usual medical care in order to control blood pressure more fully in high-risk hypertensive patients.
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Abstract
A time series "reversal" design demonstrated that behavioral counseling increased medication adherence from about 60 to 100% for a black, hypertensive patient. However, inadequate pharmacological treatment yielded no clinically important blood pressure decrease. The combination of improved compliance and minimal blood pressure reduction led the patient's physician to explore higher doses and alternate medications to achieve blood pressure control. The physician's aggressive medical treatment was initiated only after the patient's compliance had been improved. Thus, this study suggests that paraprofessional counseling can increase compliance and illustrates the need for both behavioral and physiological data in clinical management to avoid blaming patients for poorly controlled blood pressure.
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Hovell MF, Geary DC, Black DR, Kamachi K, Kirk R. The effects of lay counseling on medication adherence and blood pressure: adjunctive treatment for hypertension. Patient Educ Couns 1984; 6:91-94. [PMID: 10268102 DOI: 10.1016/0738-3991(84)90040-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ten noncompliant hypertensive patients were monitored and received counseling from trained aides. Monitoring and lay counseling was associated with a reduction of -10 mmHg in systolic blood pressure and of -7 mmHg in diastolic pressure (P less than 0.05). Medication adherence increased from 69% to 84%. Counseling resulted in pressure decreases equal to those obtained by usual care for similar but compliant patients. This analysis provides a model for paraprofessional adjunctive counseling of patients thought to be adhering poorly to their medication regimen, which may improve control of hypertension.
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