1
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Uchida Y, Koyama D, Manabe K, Suzuki K, Asano N, Endo M, Fukatsu M, Sano T, Hayashi K, Takano M, Takahashi H, Kimura S, Ikezoe T. High Efficacy and Safety of Asciminib in a Chronic Myeloid Leukemia Patient with Chronic Kidney Disease Following Renal Transplantation. Intern Med 2024; 63:717-720. [PMID: 37407456 PMCID: PMC10982009 DOI: 10.2169/internalmedicine.2179-23] [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: 04/24/2023] [Accepted: 05/29/2023] [Indexed: 07/07/2023] Open
Abstract
Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm driven by the BCR::ABL1 tyrosine kinase. Tyrosine kinase inhibitors (TKIs) have been established as standard therapies for CML. However, some CML patients experience TKI intolerance. Asciminib was approved for CML patients either intolerant or refractory to TKI therapy. We herein report a 63-year-old CML patient who underwent renal transplantation and exhibited TKI intolerance. He was switched to asciminib, which achieved a deep molecular response without exacerbation of the renal function. Our experience revealed that asciminib is effective and safe for CML patients complicated with chronic kidney disease.
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Affiliation(s)
- Yasuhiro Uchida
- Department of Hematology, Fukushima Medical University, Japan
| | - Daisuke Koyama
- Department of Hematology, Fukushima Medical University, Japan
| | - Kazuya Manabe
- Department of Hematology, Fukushima Medical University, Japan
| | - Kengo Suzuki
- Department of Hematology, Fukushima Medical University, Japan
| | - Naomi Asano
- Department of Hematology, Fukushima Medical University, Japan
| | - Mamiko Endo
- Department of Hematology, Fukushima Medical University, Japan
| | | | - Takahiro Sano
- Department of Hematology, Fukushima Medical University, Japan
| | | | - Motoki Takano
- Department of Hematology, Fukushima Medical University, Japan
| | | | - Satoshi Kimura
- Department of Hematology, Fukushima Medical University, Japan
| | - Takayuki Ikezoe
- Department of Hematology, Fukushima Medical University, Japan
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2
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Sato Y, Fukatsu M, Suzuki T, Sasajima T, Gunji N, Yoshida S, Asano N, Fukuchi K, Mori H, Takano M, Hayashi K, Takahashi H, Shirado-Harada K, Kimura S, Koyama D, Migita K, Ikezoe T. Successful allogeneic hematopoietic stem cell transplantation for myelodysplastic neoplasms complicated with secondary pulmonary alveolar proteinosis and Behçet's disease harboring GATA2 mutation. Int J Hematol 2023; 118:642-646. [PMID: 37084069 DOI: 10.1007/s12185-023-03603-0] [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] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/13/2023] [Accepted: 04/14/2023] [Indexed: 04/22/2023]
Abstract
Myelodysplastic neoplasms (MDS) are defined by cytopenia and morphologic dysplasia originating from clonal hematopoiesis. They are also frequently complicated with diseases caused by immune dysfunction, such as Behçet's disease (BD) and secondary pulmonary alveolar proteinosis (sPAP). MDS with both BD and sPAP is extremely rare, and their prognosis is poor. In addition, haploinsufficiency of the hematopoietic transcription factor gene GATA2 is recognized as a cause of familial MDS and is frequently complicated by sPAP. Herein, we report a case of MDS combined with both BD and sPAP in association with GATA2 deficiency in a Japanese woman. Because she developed progressive leukopenia and macrocytic anemia during BD treatment at the age of 61, she underwent a bone-marrow examination and was diagnosed with MDS. She subsequently developed sPAP. At the age of 63, she underwent allogeneic hematopoietic stem cell transplantation (allo-HSCT). Since allo-HSCT, she has maintained complete remission of MDS as well as the symptoms of BD and sPAP. Furthermore, we performed whole exome sequencing and identified the GATA2 Ala164Thr germline mutation. These findings suggest that patients with MDS, BD and sPAP should be considered for early allo-HSCT.
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Affiliation(s)
- Yuki Sato
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Masahiko Fukatsu
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Tomohiro Suzuki
- Department of Gastroenterology, Fukushima Rosai Hospital, Iwaki, Fukushima, 973-8403, Japan
| | - Tomomi Sasajima
- Department of Rheumatology, Fukushima Rosai Hospital, Iwaki, Fukushima, 973-8403, Japan
| | - Naohiko Gunji
- Department of Gastroenterology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Shuhei Yoshida
- Department of Rheumatology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Naomi Asano
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Koichiro Fukuchi
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Hirotaka Mori
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Motoki Takano
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Kiyohito Hayashi
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Hiroshi Takahashi
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Kayo Shirado-Harada
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Satoshi Kimura
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Daisuke Koyama
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan.
| | - Kiyoshi Migita
- Department of Rheumatology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Takayuki Ikezoe
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
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3
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Fukuchi K, Koyama D, Takada M, Mori H, Hayashi K, Asano N, Sato Y, Fukatsu M, Takano M, Takahashi H, Shirado-Harada K, Kimura S, Yamamoto T, Ikezoe T. Mutated ZRSR2 and CUL3 accelerate clonal evolution and confer venetoclax resistance via RAS signaling pathway in blastic plasmacytoid dendritic cell neoplasm. Int J Hematol 2023; 118:489-493. [PMID: 37029861 DOI: 10.1007/s12185-023-03597-9] [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] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 04/02/2023] [Accepted: 04/03/2023] [Indexed: 04/09/2023]
Abstract
Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare and aggressive subtype of myeloid malignancy characterized by skin, lymph node and central nervous system (CNS) involvement. Although various regimens are used, a standard therapeutic strategy for BPDCN has not been established. Recent studies revealed that BPDCN patients frequently have a mutation in ZRSR2, which is a minor spliceosome component. However, the association between the clinical features of BPDCN and ZRSR2 mutational status remains unknown. A 70-year-old man was referred to our hospital with skin rash and enlarged lymph nodes, as well as blasts in the peripheral blood. BPDCN was diagnosed based on the immunophenotype of the blasts derived from bone marrow. Whole exome sequencing revealed that BPDCN cells collected at diagnosis had mutations in ZRSR2, ZBTB33, CUL3, TET2 and NRAS. RNA sequencing analysis indicated that U12-type intron retention occurred in LZTR1, caused by ZRSR2 loss. After seven cycles of venetoclax combined with azacitidine therapy, BPDCN cells appeared in the peripheral blood and infiltrated the CNS. Two KRAS mutated clones appeared at BPDCN recurrence. These findings are important for understanding the pathogenesis of BPDCN, which will inform development of novel therapeutic strategies.
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Affiliation(s)
- Koichiro Fukuchi
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Daisuke Koyama
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan.
| | - Maki Takada
- Department of Dermatology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Hirotaka Mori
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Kiyohito Hayashi
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Naomi Asano
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Yuki Sato
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Masahiko Fukatsu
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Motoki Takano
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Hiroshi Takahashi
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Kayo Shirado-Harada
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Satoshi Kimura
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Toshiyuki Yamamoto
- Department of Dermatology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
| | - Takayuki Ikezoe
- Department of Hematology, Fukushima Medical University, Fukushima, Fukushima, 960-1295, Japan
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4
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Sekita T, Asano N, Kubo T, Mitani S, Hattori N, Yoshida A, Kobayashi E, Komiyama M, Toshikazu U, Nakayama R, Kawai A, Nakamura M, Ichikawa H. 45O Clonal evolution of dedifferentiated liposarcoma. ESMO Open 2023. [DOI: 10.1016/j.esmoop.2023.101082] [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] [Indexed: 04/05/2023] Open
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5
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Asano A, Asano N, Mota D, Gondim I, Aroxa F, Coriolano M, Lins O. Association among fatigue, sleep disorders and other clinical parameters in Parkinson’s disease. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa040.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction Fatigue and sleep disorders are common in Parkinson disease (PD) patients. Fatigue is not always clinically recognized because of its subjective character manifested by feelings of extreme tiredness. These non-motor symptoms can occur from the early stages of the disease and tend to persist.
Objectives To evaluate fatigue in patients with PD and the possible association with sleep disorders and other clinical parameters of the PD; and to evaluate the impact of fatigue on quality of life
Methodology A cross-sectional study with 123 patients with PD was implemented. The following instruments were used: Mini Mental State Examination, the Hoehn-Yarh Scale, Beck Depression Inventory, Parkinson’s Disease Quality of Life Questionnaire, Parkinson’s Disease Sleep Scale, Epworth Sleepiness Scale, and Parkinson’s Disease Fatigue Scale.
Results Fatigue was found in 48% of patients. Patients with fatigue presented longer duration of illness, depressive symptoms, cognitive impairment, severity of motor symptoms, excessive daytime sleepiness and nocturnal sleep disorder. Fatigue combined with sleep disorder occurred in 21% of the total sample, being more frequent in females (32% vs 15%) and in patients at more advanced stages of the disease (52% in HY3). The multiple logistic regression analysis indicated that the significant independent variables for the presence of fatigue were: cognition (OR = 1.19 P = 0.02), nocturnal sleep disorder (OR = 1.03 P = 0.0001); among PDSS domains, nocturnal motor symptoms (OR = 1.09 P = 0.0005) and sleep refreshment (OR = 1.11 P = 0.02); among PDQ-39 domains, mobility (OR = 0.9323 P < 0.0001) and body discomfort (OR = 0.9767 P = 0.0428).
Conclusion Fatigue is common in PD, especially in the more advanced stages, and it seems to be associated with the female gender, nocturnal sleep disorder and cognition, having thus a negative impact on the quality of life.
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Affiliation(s)
- A Asano
- Pro-Parkinson Program of Clinical Hospital of Federal University of Pernambuco – Recife (PE), Brazil
| | - N Asano
- Pro-Parkinson Program of Clinical Hospital of Federal University of Pernambuco – Recife (PE), Brazil
| | - D Mota
- Pro-Parkinson Program of Clinical Hospital of Federal University of Pernambuco – Recife (PE), Brazil
| | - I Gondim
- Pro-Parkinson Program of Clinical Hospital of Federal University of Pernambuco – Recife (PE), Brazil
| | - F Aroxa
- Federal University of Pernambuco – Recife, Pernambuco (PE), Brazil
| | - M Coriolano
- Pro-Parkinson Program of Clinical Hospital of Federal University of Pernambuco – Recife (PE), Brazil
| | - O Lins
- Pro-Parkinson Program of Clinical Hospital of Federal University of Pernambuco – Recife (PE), Brazil
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6
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Seike K, Fujii N, Asano N, Ohkuma S, Hirata Y, Fujii K, Sando Y, Nakamura M, Naito K, Saeki K, Meguri Y, Asada N, Ennishi D, Nishimori H, Matsuoka KI, Tsubaki K, Otsuka F, Maeda Y. Efficacy of HLA virtual cross-matched platelet transfusions for platelet transfusion refractoriness in hematopoietic stem cell transplantation. Transfusion 2020; 60:473-478. [PMID: 31970799 DOI: 10.1111/trf.15664] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 11/21/2019] [Accepted: 11/27/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Cross-matched platelet (cross-matched PLT) transfusion is effective for immune-mediated platelet transfusion refractoriness (PTR), but is more costly and time-consuming for physical cross-match than using standard PLT units. Recent studies have reported the utility of human leucocyte antigens (HLA) virtual cross-matched PLT (HLA-matched PLT) that is defined as HLA-A/B matched or no antibody against donor-specific antigen. Here, we evaluated the effect of HLA-matched PLTs for PTR in post hematopoietic stem cell transplant (HSCT) recipients. STUDY DESIGN AND METHODS Our study included a total of 241 PLTs in 16 patients who underwent HSCT at Okayama University Hospital between 2010 and 2017, receiving either HLA-matched or cross-matched PLTs. We calculated the 24-hour corrected count increments (CCI-24) to evaluate the effect of PLTs. A CCI-24 ≥ 4500 was considered to be a successful transfusion. RESULTS We analyzed 139 cross-matched PLTs and 102 HLA-matched PLTs. In the immune-mediated PTR, the rate of successful transfusion was 60.5% for cross-matched PLT and 63.4% for HLA-matched PLT (p = 0.825). On the other hand, the median CCI-24 for cross-matched PLT transfusions and HLA-matched PLT transfusions were 1856 and 5824 (p < 0.001), with a success rate of 28.1 and 54.1% in cases with non-immune-mediated PTR, respectively (p = 0.001). CONCLUSION The effectiveness of HLA-matched PLT is not inferior to cross-matched PLT. This result indicates that physical cross-match can be omitted in post HSCT PTR.
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Affiliation(s)
- Keisuke Seike
- Division of Transfusion, Okayama University Hospital, Okayama, Japan.,Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Nobuharu Fujii
- Division of Transfusion, Okayama University Hospital, Okayama, Japan.,Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Naomi Asano
- Division of Transfusion, Okayama University Hospital, Okayama, Japan
| | - Shigenori Ohkuma
- Japanese Red Cross Chugoku-Shikoku Block Blood Center, Hiroshima, Japan
| | - Yasushi Hirata
- Japanese Red Cross Chugoku-Shikoku Block Blood Center, Hiroshima, Japan
| | - Keiko Fujii
- Division of Transfusion, Okayama University Hospital, Okayama, Japan.,Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Yasuhisa Sando
- Division of Transfusion, Okayama University Hospital, Okayama, Japan.,Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Makoto Nakamura
- Division of Transfusion, Okayama University Hospital, Okayama, Japan.,Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | | | - Kyosuke Saeki
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Yusuke Meguri
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Noboru Asada
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Daisuke Ennishi
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Hisakazu Nishimori
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Ken-Ichi Matsuoka
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| | - Kazuo Tsubaki
- Japanese Red Cross Chugoku-Shikoku Block Blood Center, Hiroshima, Japan
| | - Fumio Otsuka
- Division of Transfusion, Okayama University Hospital, Okayama, Japan.,Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yoshinobu Maeda
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
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7
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Miyazaki K, Takeuchi T, Yamaguchi M, Asano N, Sawaki A, Imai H, Ono R, Nosaka T, Kobayashi K, Tanaka K, Katayama N. GENE MUTATIONS AND SITES OF INVOLVEMENT IN DUODENAL-TYPE FOLLICULAR LYMPHOMA. Hematol Oncol 2019. [DOI: 10.1002/hon.2_2631] [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]
Affiliation(s)
- K. Miyazaki
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - T. Takeuchi
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - M. Yamaguchi
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - N. Asano
- Department of Molecular Diagnostics; Shinshu Medical Center; Suzaka Japan
| | - A. Sawaki
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - H. Imai
- Pathology Division; Mie University Hospital; Tsu Japan
| | - R. Ono
- Department of Microbiology and Molecular Genetics; Mie University Graduate School of Medicine; Tsu Japan
| | - T. Nosaka
- Department of Microbiology and Molecular Genetics; Mie University Graduate School of Medicine; Tsu Japan
| | - K. Kobayashi
- Gastroenterology; Matsusaka Chuo General Hospital; Matsusaka Japan
| | - K. Tanaka
- Department of Endoscopy; Mie University Hospital; Tsu Japan
| | - N. Katayama
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
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8
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Yamaguchi M, Suzuki R, Oguchi M, Miyazaki K, Taguchi S, Amaki J, Maeda T, Kubota N, Maruyama D, Terui Y, Sekiguchi N, Takizawa J, Tsukamoto H, Murayama T, Ando T, Matsuoka H, Hasegawa M, Wada H, Sakai R, Kameoka Y, Tsukamoto N, Choi I, Masaki Y, Shimada K, Fukuhara N, Utsumi T, Uoshima N, Kagami Y, Asano N, Katayama N. CLINICAL OUTCOMES AND DIAGNOSIS-TO-TREATMENT INTERVAL IN PATIENTS WITH NK/T-CELL LYMPHOMA: 7-YEAR FOLLOW-UP OF THE NKEA STUDY. Hematol Oncol 2019. [DOI: 10.1002/hon.86_2630] [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: 11/09/2022]
Affiliation(s)
- M. Yamaguchi
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - R. Suzuki
- Oncology and Hematology; Shimane University Hospital; Izumo Japan
| | - M. Oguchi
- Radiation Oncology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
| | - K. Miyazaki
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - S. Taguchi
- Radiation Oncology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
| | - J. Amaki
- Hematology and Oncology; Tokai University School of Medicine; Kanagawa Japan
| | - T. Maeda
- Hematology; Kurashiki Central Hospital; Kurashiki Japan
| | - N. Kubota
- Hematology; Saitama Cancer Center; Ina Japan
| | - D. Maruyama
- Hematology; National Cancer Center Hospital; Tokyo Japan
| | - Y. Terui
- Hematology Oncology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
| | - N. Sekiguchi
- Comprehensive Cancer Therapy; Shinshu University School of Medicine; Matsumoto Japan
| | - J. Takizawa
- Hematology; Endocrinology and Metabolism, Niigata University Faculty of Medicine; Niigata Japan
| | - H. Tsukamoto
- Hematology; Showa University School of Medicine; Tokyo Japan
| | - T. Murayama
- Hematology; Hyogo Cancer Center; Akashi Japan
| | - T. Ando
- Hematology; Respiratory Medicine and Oncology, Saga University; Saga Japan
| | - H. Matsuoka
- Medical Oncology/Hematology; Kobe University; Kobe Japan
| | - M. Hasegawa
- Radiation Oncology; Nara Medical University; Kashihara Japan
| | - H. Wada
- Hematology; Kawasaki Medical School; Kurashiki Japan
| | - R. Sakai
- Medical Oncology; Kanagawa Cancer Center; Yokohama Japan
| | - Y. Kameoka
- Hematology; Nephrology and Rheumatology, Akita University; Akita Japan
| | - N. Tsukamoto
- Oncology Center; Gunma University Hospital; Maebashi Japan
| | - I. Choi
- Hematology; National Hospital Organization Kyushu Cancer Center; Fukuoka Japan
| | - Y. Masaki
- Hematology and Immunology; Kanazawa Medical University; Kanazawa Japan
| | - K. Shimada
- Hematology and Oncology; Nagoya University School of Medicine; Nagoya Japan
| | - N. Fukuhara
- Hematology & Rheumatology; Tohoku University School of Medicine; Sendai Japan
| | - T. Utsumi
- Hematology; Shiga Medical Center for Adults; Moriyama Japan
| | - N. Uoshima
- Hematology; Japanese Red Cross Kyoto Daini Hospital; Kyoto Japan
| | - Y. Kagami
- Hematology; Toyota Kosei Hospital; Toyota Japan
| | - N. Asano
- Molecular Diagnostics; Shinshu Medical Center; Suzaka Japan
| | - N. Katayama
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
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9
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Yasuno S, Miyoshi Y, Asano N, Okita T, Yamaguchi M, Shimomura N, Kashiwagi K, Shimomura Y. Sporadic case of Darier disease caused by a novel splice-site mutation in the ATP2A2 gene. Clin Exp Dermatol 2018; 44:e10-e12. [PMID: 30294936 DOI: 10.1111/ced.13806] [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] [Accepted: 07/19/2018] [Indexed: 11/29/2022]
Affiliation(s)
- S Yasuno
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Y Miyoshi
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - N Asano
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - T Okita
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - M Yamaguchi
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - N Shimomura
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - K Kashiwagi
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
| | - Y Shimomura
- Department of Dermatology, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan
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10
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Nishiyama C, Asano N, Kato J, Shimazu S. The opinion survey about supporting for disaster victims and disaster management in Japan. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.1994] [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] [Indexed: 10/23/2022]
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Chihara D, Asano N, Ohmachi K, Nishikori M, Okamoto M, Sawa M, Sakai R, Okoshi Y, Tsukamoto N, Yakushijin Y, Nakamura S, Kinoshita T, Ogura M, Suzuki R. Ki-67 is a strong predictor of central nervous system relapse in patients with mantle cell lymphoma (MCL). Ann Oncol 2015; 26:966-973. [DOI: 10.1093/annonc/mdv074] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 02/11/2015] [Indexed: 11/12/2022] Open
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12
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Iijima K, Koike T, Ara N, Nakagawa K, Kondo Y, Uno K, Hatta W, Asano N, Imatani A, Shimosegawa T. Identification of a high-risk group for low-dose aspirin-induced gastropathy by measuring serum pepsinogen in H. pylori-infected subjects. J Gastroenterol 2015; 50:305-12. [PMID: 24952898 DOI: 10.1007/s00535-014-0976-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 06/04/2014] [Indexed: 02/04/2023]
Abstract
BACKGROUND We recently demonstrated in humans that the extent of low-dose aspirin (LDA)-induced gastropathy was directly related to the individual gastric acid secretion level. We also established reliable cutoff serum pepsinogen (PG) values to predict gastric acid secretion status. In this study, we investigated the clinical usefulness of measuring the serum pepsinogen values for identifying a high-risk group for gastric mucosal injury among chronic LDA users. METHODS One hundred long-term LDA users were enrolled in this analysis. Serum from each subject was subjected to determination of H. pylori status and measurement of pepsinogen values. According to our recent report, a PG I value ≥ 50 ng/mL was defined as estimated hyperchlorhydria in H. pylori-negative subjects, while a PG I/II ≥ 3.3 was defined as estimated hyperchlorhydria in H. pylori-positive subjects. The grade of gastric mucosal injury was assessed endoscopically, and multiple logistic regression analyses were used to estimate the risk. RESULTS Estimated hyperchlorhydria was a strong independent risk for intensive gastric mucosal injury with an OR (95% CI): 34.0 (4.5-259) and for gastric ulcer with an OR (95% CI): 10.2 (1.8-58.3) in H. pylori-positive subjects, while it was not a significant risk in H. pylori-negative subjects. The association persisted even after excluding those with conventional risks for LDA-gastropathy such as ulcer histories. CONCLUSION Using simple serum measurement of H. pylori antibody and pepsinogen concentrations, an extremely high-risk group for LDA-induced gastropathy could be extracted, and these patients should become a therapeutic target for prevention of LDA-induced gastropathy.
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Affiliation(s)
- K Iijima
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aobaku, Sendai, 980-8574, Japan,
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13
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Ishiyama T, Kotoda M, Asano N, Ikemoto K, Mitsui K, Sato H, Matsukawa T, Sessler DI. The effects of Patent Blue dye on peripheral and cerebral oxyhaemoglobin saturations. Anaesthesia 2014; 70:429-33. [DOI: 10.1111/anae.12932] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2014] [Indexed: 11/28/2022]
Affiliation(s)
- T. Ishiyama
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - M. Kotoda
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - N. Asano
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - K. Ikemoto
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - K. Mitsui
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - H. Sato
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - T. Matsukawa
- Department of Anesthesiology; Faculty of Medicine; University of Yamanashi; Chuo Yamanashi Japan
| | - D. I. Sessler
- Department of Outcomes Research; Anesthesiology Institute; The Cleveland Clinic; Cleveland OH USA
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15
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Abstract
The detection of early esophageal squamous cell carcinoma (ESCC) in patients following radiotherapy for squamous cell carcinoma of the head and neck (HNSCC) has increased with the development of endoscopic technologies. The aim of the current case - control study was to elucidate the risk factors of serious laryngeal edema, a lethal complication that occurs during endoscopic resection for ESCC. Among 184 consecutive patients who were treated by endoscopic resection for ESCC between January 2009 and May 2012, five of 22 patients with a history of radiotherapy for HNSCC suffered from serious laryngeal edema, which was not observed in patients who had not undergone radiotherapy. The susceptibility to serious laryngeal edema in patients with a history of radiotherapy followed by neck dissection for HNSCC was significantly greater than those without such histories. Despite the limited number of cases, we suggest that previous radiotherapy followed by neck dissection for HNSCC might be a predictive factor for serious laryngeal edema during endoscopic resection.
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Affiliation(s)
- N Ara
- Division of Gastroenterology, Tohoku University Hospital, Sendai, Japan
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16
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Affiliation(s)
- Y. Hachisuka
- Department of Microbiology, Nagoya City University Medical School and Department of Bacteriology, School of Medicine; Nagoya University; Nagoya Japan
| | - K. Sugai
- Department of Microbiology, Nagoya City University Medical School and Department of Bacteriology, School of Medicine; Nagoya University; Nagoya Japan
| | - N. Asano
- Department of Microbiology, Nagoya City University Medical School and Department of Bacteriology, School of Medicine; Nagoya University; Nagoya Japan
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17
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Affiliation(s)
| | - M. Kotoda
- University of Yamanashi; Chuo; Japan
| | - N. Asano
- University of Yamanashi; Chuo; Japan
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18
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Kobayashi T, Tsutsumi Y, Sakamoto N, Nagoshi H, Yamamoto-Sugitani M, Shimura Y, Mizutani S, Matsumoto Y, Nishida K, Horiike S, Asano N, Nakamura S, Kuroda J, Taniwaki M. Double-hit Lymphomas Constitute a Highly Aggressive Subgroup in Diffuse Large B-cell Lymphomas in the Era of Rituximab. Jpn J Clin Oncol 2012; 42:1035-42. [DOI: 10.1093/jjco/hys148] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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19
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Ito H, Iijima K, Ara N, Asanuma K, Endo H, Asano N, Koike T, Abe Y, Imatani A, Shimosegawa T. Reactive nitrogen oxide species induce dilatation of the intercellular space of rat esophagus. Scand J Gastroenterol 2010; 45:282-91. [PMID: 20001645 DOI: 10.3109/00365520903469956] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Dilatation of the intercellular space (DIS) of the esophageal epithelium is recognized as one of the earliest histological changes in gastroesophageal reflux disease patients. At the human gastroesophageal junction, reactive nitrogen oxide species (RNOS) are generated luminally through the entero-salivary re-circulation of dietary nitrate. In cases with gastroesophageal reflux, the site of luminal RNOS generation may shift to the distal esophagus. The aim of this study was to investigate whether luminal RNOS exposure could be involved in the pathogenesis of DIS. MATERIAL AND METHODS Rat esophageal mucosa was studied with an Ussing chamber model. On the luminal side of the chamber, RNOS were generated by the acidification of physiologic concentrations of sodium nitrite (1.0 or 5.0 mM). Esophageal barrier function was assessed by means of electrophysiological transmembrane resistance and membrane permeability by means of (3)H-mannitol flux. The dimensions of the intercellular spaces were assessed by using transmission electron microscopy. RESULTS Administration of acid plus sodium nitrite induced DIS of the esophageal epithelium, and this ultrastructural morphological change was accompanied by a concomitant decrease in the transmembrane resistance and an increase in the epithelial permeability. The DIS induced by luminal RNOS was also confirmed in an in vivo exposure model. CONCLUSIONS The present animal study indicates that the RNOS generated by the acidification of salivary nitrite in the presence of refluxed gastric acid in the esophagus could be a luminal factor that is responsible for the induction of DIS. Further studies are warranted to investigate the clinical relevance of the present findings to the human situation.
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Affiliation(s)
- H Ito
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Aobaku, Sendai, Japan
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20
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Nakashima H, Sugaya M, Minatani Y, Ohmatsu H, Asano N, Fujimoto M, Kikuchi K, Ihn H, Tamaki K. Cutaneous gamma/delta T-cell lymphoma treated with retinoid and narrowband ultraviolet B. Clin Exp Dermatol 2009; 34:e345-6. [DOI: 10.1111/j.1365-2230.2009.03296.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Abstract
A large number of compounds mimicking the structures of monosaccharides or oligosaccharides have been discovered from natural sources. Such sugar mimics inhibit carbohydrate-degrading enzymes because of a structural resemblance to the sugar moiety of the natural substrate. Carbohydrate-degrading enzymes are involved in a wide range of important biological processes, such as intestinal digestion, posttranslational processing of the sugar chain of glycoproteins, their quality control mechanisms, lysosomal catabolism of glycoconjugates, and some viral infections. It has now been realized that inhibitors of the enzymes have enormous therapeutic potential in diabetes and lysosomal storage disorders. In this review, the general bioactivity, current applications, and the prospects for new therapeutic applications are described.
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Affiliation(s)
- N Asano
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3 Kanagawa-machi, Kanazawa, 920-1181, Japan.
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22
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Shimizu T, Asano N, Mizutani T, Chang HC, Kitagawa S. Allosteric binding of amino alcohols and diamines by dimeric zinc biladienone. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2008.11.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Takahashi E, Asano N, Li C, Tanaka T, Shimada K, Shimada S, Yoshino T, Kojima M, Hara K, Eimoto T, Nakamura S. Nodal T/NK-cell lymphoma of nasal type: a clinicopathological study of six cases. Histopathology 2008; 52:585-96. [DOI: 10.1111/j.1365-2559.2008.02997.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Asano N, Suzuki R, Matsuo K, Kagami Y, Ishida F, Tamaru JI, Jin GS, Sato Y, Shimoyama Y, Yoshino T, Morishima Y, Nakamura S. Cytotoxic molecule expression is predictive of prognosis in Hodgkin's-like anaplastic large cell lymphoma. Histopathology 2007; 50:705-15. [PMID: 17493234 DOI: 10.1111/j.1365-2559.2007.02674.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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: 11/28/2022]
Abstract
AIMS The Revised European American Lymphoma classification uses the term Hodgkin's-like anaplastic large cell lymphoma (HD-like ALCL) for borderline cases with features of both anaplastic large cell lymphoma (ALCL) and classical Hodgkin's lymphoma (HL). The aim of this study was to clarify the association between cytotoxic molecule (CM) expression and clinical outcome in HD-like ALCL. METHODS AND RESULTS Subjects were 59 patients with HD-like ALCL, defined by nodal presentation without mediastinal bulky lesions, T- or null-cell phenotype, CD30+ anaplastic lymphoma kinase (ALK)- phenotype and by confluent sheets or nodules of large cells mimicking classic Hodgkin and Reed-Sternberg cells. We evaluated the presenting features and prognosis of subjects on categorization into two defined groups, namely CM (TIA1 and/or granzyme B)-positive (n = 21) and CM-negative (n = 38). The series consisted of 18 women and 41 men ranging from 16 to 88 years of age (median 59 years). The CM+ group had poorer disease-specific survival than the CM- group (P = 0.02) despite the absence of differences in other clinical characteristics. Multivariate analysis confirmed that CM expression was an independent prognostic factor, in contrast to phenotypic categorization (T-cell vs. null-cell group), which had no prognostic impact on disease-specific survival. CONCLUSION CM expression is predictive of prognosis in HD-like ALCL.
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Affiliation(s)
- N Asano
- Department of Pathology and Molecular Diagnostics, Aichi Cancer Center, 1-1 Kanokoden, Chikusa-ku, Nagoya 464-8681, Japan.
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25
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Asano N, Uemura S, Kinugawa T, Akasaka H, Mizutani T. Synthesis of biladienone and bilatrienone by coupled oxidation of tetraarylporphyrins. J Org Chem 2007; 72:5320-6. [PMID: 17559279 DOI: 10.1021/jo070692a] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tetraarylbiladien-ab-ones bearing various substituents (R) in the para position of the phenyl groups were preprared by coupled oxidation of tetraarylporphyrin iron complexes. The yields of 5,10,15-triaryl-19-aroyl-15-hydroxybiladien-ab-ones were 74% (R=H), 85% (R=OMe), 44% (R=COOMe), and 28% (R=CN). Kinetic studies of the iron porphyrin oxidation revealed that the reaction is accelerated by an electron-withdrawing substituent with the Hammett reaction constant rho=0.295. 5,10,15-Triaryl-19-aroyl-15-hydroxybiladien-ab-ones undergo the acid-catalyzed elimination reaction either by acetic acid or by mesoporous silica to afford 5,10,15-triaryl-19-aroylbilatrien-abc-one. The elimination reaction in acetic acid is accelerated by an electron-donating substituent with the Hammett reaction constant rho=-1.48.
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Affiliation(s)
- Naomi Asano
- Department of Molecular Science and Technology, Faculty of Engineering, Doshisha University, Tatara-Miyakotani, Kyotanabe, Kyoto 610-0321, Japan
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26
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Saeki H, Tsunemi Y, Asano N, Nakamura K, Sekiya T, Hirai K, Kakinuma T, Fujita H, Kagami S, Tamaki K. Analysis of GM-CSF gene polymorphisms (3606T/C and 3928C/T) in Japanese patients with atopic dermatitis. Clin Exp Dermatol 2006; 31:278-80. [PMID: 16487109 DOI: 10.1111/j.1365-2230.2005.02052.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 11/29/2022]
Abstract
Granulocyte-macrophage colony-stimulating factor (GM-CSF) is thought to play an important role in the pathogenesis of atopic dermatitis. To examine whether GM-CSF single nucleotide polymorphisms (SNPs) are associated with susceptibility to atopic dermatitis, we investigated the genotype and allele frequencies of the SNPs 3606T/C and 3928C/T of the GM-CSF gene in 181 Japanese patients with atopic dermatitis and 100 controls, using a PCR restriction fragment length polymorphism method. A strong linkage disequilibrium existed between the polymorphisms 3606 and 3928, suggesting two common GM-CSF haplotypes, 3606*T-3928*C and 3606*C-3928*T. However, there was no significant difference in genotype or allele frequencies between patients with atopic dermatitis and controls for either of the two polymorphisms, thus GM-CSF SNPs do not appear to be associated with susceptibility to atopic dermatitis in Japanese patients. A large-scale study is necessary to confirm these findings.
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Affiliation(s)
- H Saeki
- Fukushima Medical University School of Medicine, Fukushima, Japan.
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27
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Makishima H, Ito T, Asano N, Nakazawa H, Shimodaira S, Kamijo Y, Nakazawa Y, Suzuki T, Kobayashi H, Kiyosawa K, Ishida F. Significance of chemokine receptor expression in aggressive NK cell leukemia. Leukemia 2005; 19:1169-74. [PMID: 15902300 DOI: 10.1038/sj.leu.2403732] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [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: 02/04/2023]
Abstract
Natural killer (NK) cell-type lymphoproliferative diseases of granular lymphocytes can be subdivided into aggressive NK cell leukemia (ANKL) and chronic NK cell lymphocytosis (CNKL). One reason for the poor outcome in ANKL is leukemic infiltration into multiple organs. The mechanisms of cell trafficking associated with the chemokine system have been investigated in NK cells. To clarify the mechanism of systemic migration of leukemic NK cells, we enrolled nine ANKL and six CNKL cases, and analyzed the expression profiles and functions of chemokine receptors by flowcytometry and chemotaxis assay. CXCR1 was detected on NK cells in all groups, and CCR5 was positive in all ANKL cells. Proliferating NK cells were simultaneously positive for CXCR1 and CCR5 in all ANKL patients examined, and NK cells with this phenotype did not expand in CNKL patients or healthy donors. ANKL cells showed enhanced chemotaxis toward the ligands of these receptors. These results indicated that the chemokine system might play an important role in the pathophysiology of ANKL and that chemokine receptor profiling might be a novel tool for discriminating ANKL cells from benign NK cells.
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MESH Headings
- Adult
- Aged
- Biomarkers, Tumor/analysis
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/physiology
- Cell Movement/drug effects
- Cell Movement/physiology
- Chemokines/pharmacology
- Child
- Female
- Gene Expression Profiling
- Humans
- Killer Cells, Natural/chemistry
- Killer Cells, Natural/immunology
- Killer Cells, Natural/pathology
- Leukemia, Lymphoid/diagnosis
- Leukemia, Lymphoid/genetics
- Leukemia, Lymphoid/physiopathology
- Lymphocytosis/diagnosis
- Lymphocytosis/genetics
- Male
- Middle Aged
- Phenotype
- Receptors, CCR5/genetics
- Receptors, CCR5/physiology
- Receptors, Chemokine/analysis
- Receptors, Chemokine/genetics
- Receptors, Chemokine/physiology
- Receptors, Interleukin-8A/genetics
- Receptors, Interleukin-8A/physiology
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Affiliation(s)
- H Makishima
- The Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan
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28
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Taguchi T, Yamashita E, Mizutani T, Nakajima H, Yabuuchi M, Asano N, Miwa I. Hepatic glycogen breakdown is implicated in the maintenance of plasma mannose concentration. Am J Physiol Endocrinol Metab 2005; 288:E534-40. [PMID: 15536204 DOI: 10.1152/ajpendo.00451.2004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
D-mannose is an essential monosaccharide constituent of glycoproteins and glycolipids. However, it is unknown how plasma mannose is supplied. The aim of this study was to explore the source of plasma mannose. Oral administration of glucose resulted in a significant decrease of plasma mannose concentration after 20 min in fasted normal rats. However, in fasted type 2 diabetes model rats, plasma mannose concentrations that were higher compared with normal rats did not change after the administration of glucose. When insulin was administered intravenously to fed rats, it took longer for plasma mannose concentrations to decrease significantly in diabetic rats than in normal rats (20 and 5 min, respectively). Intravenous administration of epinephrine to fed normal rats increased the plasma mannose concentration, but this effect was negated by fasting or by administration of a glycogen phosphorylase inhibitor. Epinephrine increased mannose output from the perfused liver of fed rats, but this effect was negated in the presence of a glucose-6-phosphatase inhibitor. Epinephrine also increased the hepatic levels of hexose 6-phosphates, including mannose 6-phosphate. When either lactate alone or lactate plus alanine were administered as gluconeogenic substrates to fasted rats, the concentration of plasma mannose did not increase. When lactate was used to perfuse the liver of fasted rats, a decrease, rather than an increase, in mannose output was observed. These findings indicate that hepatic glycogen is a source of plasma mannose.
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Affiliation(s)
- T Taguchi
- Dept. of Pathobiochemistry, Faculty of Pharmacy, Meijo Univ., 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
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29
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Ohyauchi M, Imatani A, Yonechi M, Asano N, Miura A, Iijima K, Koike T, Sekine H, Ohara S, Shimosegawa T. The polymorphism interleukin 8 -251 A/T influences the susceptibility of Helicobacter pylori related gastric diseases in the Japanese population. Gut 2005; 54:330-5. [PMID: 15710978 PMCID: PMC1774396 DOI: 10.1136/gut.2003.033050] [Citation(s) in RCA: 175] [Impact Index Per Article: 9.2] [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] [Indexed: 12/19/2022]
Abstract
BACKGROUND Helicobacter pylori infection is associated with variable clinical outcomes, including gastroduodenal diseases, and genetic factors may be relevant in this process. AIMS We investigated the effects of an interleukin 8 (IL-8) gene polymorphism on the risk of gastroduodenal diseases, the degree of H pylori induced gastritis, and IL-8 gene transcription. SUBJECTS The study was performed in 244 healthy control subjects and 690 H pylori positive patients with non-cardia gastric cancer, gastric ulcer, duodenal ulcer, or gastritis. METHODS We identified the IL-8 -251 A/T polymorphism by direct sequence analysis, and measured the gastritis score and serum pepsinogen (PG). The transcriptional promoter activity of the IL-8 gene was assessed by luciferase assay. RESULTS IL-8 -251A was associated with a higher risk of gastric cancer and gastric ulcer. Patients carrying IL-8 -251A showed an increased risk of gastric cancer (odds ratios (OR) 2.01 (95% confidence interval (CI) 1.38-2.92)) and gastric ulcer (OR 2.07 (95% CI 1.37-3.12)). Compared with patients younger than 49 years, atrophy and metaplasia scores in the antrum were significantly higher and the PG I/II ratio significantly lower in -251A carriers than in T/T carriers. In the in vitro assay, IL-8 -251A showed enhanced promoter activity in response to IL-1beta or tumour necrosis factor alpha. CONCLUSIONS The IL-8 -251A allele may be associated with progression of gastric atrophy in patients with H pylori infection, and may increase the risk of gastric cancer and gastric ulcer in Japanese people.
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Affiliation(s)
- M Ohyauchi
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan.
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30
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Ogo H, Ikeda K, Asano N, Sano Y, Date H, Koide N, Shimizu N, Harada M. Suppressed erythropoiesis after ABO-minor-mismatched living-donor lobar lung transplantation. J Heart Lung Transplant 2004; 23:767-9. [PMID: 15366439 DOI: 10.1016/s1053-2498(03)00233-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Anti-A and/or anti-B antibodies synthesized by lymphoid tissues contained in ABO-mismatched solid organ grafts have been reported to cause hemolytic anemia, but not suppressed red blood cell production. A case of living-donor lobar lung transplantation is presented in which suppression of erythropoiesis was associated with ABO mismatched organ transplantation.
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Affiliation(s)
- Hiroaki Ogo
- Division of Blood Transfusion, Okayama University Hospital, Okayama, Japan
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31
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Asano N, Yamakazi T, Seto M, Matsumine A, Yoshikawa H, Uchida A. The expression and prognostic significance of bone morphogenetic protein-2 in patients with malignant fibrous histiocytoma. ACTA ACUST UNITED AC 2004. [DOI: 10.1302/0301-620x.86b4.14484] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We investigated the rates of expression of bone morphogenetic protein-2 (BMP-2) in 29 adult patients with high-grade malignant fibrous histiocytoma of soft tissue, using the BMP-2-specific monoclonal antibody, AbH3b2/17, and found that they ranged from 1.9% to 78.9%. The survival at five years of the groups expressing high (≥30%) and low (< 30%) levels of BMP-2 was 85.7% and 36.3%, respectively. Multivariable analysis showed that only BMP-2 had prognostic significance for continuous disease-free survival and for overall survival (p < 0.05). Our findings indicate that over-expression of BMP-2 in malignant fibrous histiocytoma of soft tissue is the most reliable prognostic indicator of the parameters assessed.
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Affiliation(s)
- N. Asano
- Department of Orthopaedic Surgery, Mie University Medical School, Edobashi 2-174, Tsu-City, Mie Prefecture 415-8507, Japan
| | - T. Yamakazi
- Department of Orthopaedic Surgery, Mie University Medical School, Edobashi 2-174, Tsu-City, Mie Prefecture 415-8507, Japan
| | - M. Seto
- Department of Orthopaedic Surgery, Mie University Medical School, Edobashi 2-174, Tsu-City, Mie Prefecture 415-8507, Japan
| | - A. Matsumine
- Department of Orthopaedic Surgery, Mie University Medical School, Edobashi 2-174, Tsu-City, Mie Prefecture 415-8507, Japan
| | - H. Yoshikawa
- Department of Orthopaedic Surgery, Osaka University Medical School, Osaka-City, Osaka Prefecture, Japan
| | - A. Uchida
- Department of Orthopaedic Surgery, Mie University Medical School, Edobashi 2-174, Tsu-City, Mie Prefecture 415-8507, Japan
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32
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Asano N, Yamakazi T, Seto M, Matsumine A, Yoshikawa H, Uchida A. The expression and prognostic significance of bone morphogenetic protein-2 in patients with malignant fibrous histiocytoma. J Bone Joint Surg Br 2004; 86:607-12. [PMID: 15174563] [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: 04/29/2023]
Abstract
We investigated the rates of expression of bone morphogenetic protein-2 (BMP-2) in 29 adult patients with high-grade malignant fibrous histiocytoma of soft tissue, using the BMP-2-specific monoclonal antibody, AbH3b2/17, and found that they ranged from 1.9% to 78.9%. The survival at five years of the groups expressing high (> or = 30%) and low (< 30%) levels of BMP-2 was 85.7% and 36.3%, respectively. Multivariable analysis showed that only BMP-2 had prognostic significance for continuous disease-free survival and for overall survival (p < 0.05). Our findings indicate that over-expression of BMP-2 in malignant fibrous histiocytoma of soft tissue is the most reliable prognostic indicator of the parameters assessed.
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Affiliation(s)
- N Asano
- Department of Orthopaedic Surgery, Mie University Medical School, Faculty of Medicine, Tsu-City, Mie Prefecture, Japan
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Jockusch RA, Talbot FO, Asano N, Fleet GW, Simons JP. Gas-phase structure and conformation of the glycosidase and ceramide glucosyltransferase inhibitor N-benzyl deoxynojirimycin. Phys Chem Chem Phys 2004. [DOI: 10.1039/b413672a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhao WH, Asano N, Hu ZQ, Shimamura T. Restoration of antibacterial activity of beta-lactams by epigallocatechin gallate against beta-lactamase-producing species depending on location of beta-lactamase. J Pharm Pharmacol 2003; 55:735-40. [PMID: 12841932 DOI: 10.1211/002235703765951320] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The combined effects of (-)-epigallocatechin gallate (EGCg) and beta-lactams were investigated against various beta-lactamase-producing clinical isolates, including 21 Staphylococcus aureus, 6 Escherichia coli, 3 Klebsiella pneumoniae and 8 Serratia marcescens strains. Penicillin in combination with EGCg at 12.5 microg mL(-1) showed the most potent synergy against 100% penicillinase-producing S. aureus. However, cefotaxime or imipenem in combination with higher concentration of EGCg (100 microg mL(-1)) only showed slight synergy against 2 of 17 Gram-negative rods. Similar to the effect on the penicillinase from S. aureus, however, EGCg also directly inhibited the extracted beta-lactamases from the Gram-negative rods, thereby protecting beta-lactams from inactivation. The different effects of the combinations on different beta-lactamase-producing species were confirmed to be related to the cellular locations of beta-lactamases. In contrast to a 32.7% extracellular fraction of total beta-lactamase activity in a penicillinase-producing S. aureus, the fractions were 0.6%, 0.6% and 1.2% in a TEM-derived extended-spectrum beta-lactamase-producing E. coli, an inhibitor-resistant beta-lactamase-producing K. pneumoniae and an IMP-producing S. marcescens, respectively. In conclusion, the combination of penicillin with EGCg showed potent synergy against penicillinase-producing S. aureus in-vitro. The combinations of beta-lactams and EGCg against beta-lactamase-producing Gram-negative rods do indicate a limitation owing to the cellular location of beta-lactamases.
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Affiliation(s)
- W-H Zhao
- Department of Microbiology and Immunology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
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Saeki H, Ohmatsu H, Hoashi T, Asano N, Idezuki T, Kawabata Y, Asahina A, Kikuchi K, Tamaki K. Dermatofibrosarcoma protuberans with COL1A1 (exon 18) -PDGFB (exon 2) fusion transcript. Br J Dermatol 2003; 148:1028-31. [PMID: 12786837 DOI: 10.1046/j.1365-2133.2003.05367.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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]
Abstract
BACKGROUND Fusion of the collagen type I alpha 1 (COL1A1) gene with the platelet-derived growth factor B-chain (PDGFB) gene has been described in dermatofibrosarcoma protuberans (DFSP). Various exons of the COL1A1 gene have been shown to be involved in the fusion with exon 2 of the PDGFB gene. Objectives We examined the breakpoint of the COL1A1 gene using the tumour specimen from the patient with DFSP. METHODS Reverse transcriptase-polymerase chain reaction (PCR) was performed using cultured DFSP tumour cells. Nucleotide sequence analysis was carried out using the PCR product to identify the breakpoint. RESULTS The COL1A1-PDGFB fusion transcript was detected from the tumour specimen. Sequence analysis revealed that exon 18 of the COL1A1 gene was fused with exon 2 of the PDGFB gene. CONCLUSIONS This study identified a novel COL1A1 breakpoint, namely, exon 18 of the COL1A1 gene.
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Affiliation(s)
- H Saeki
- Department of Dermatology, Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8655, Japan
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Miwa I, Shibata K, Asano N. No sizable inhibition of glucose-induced insulin secretion by acarbose and castanospermine. Horm Metab Res 2002; 34:414-5. [PMID: 12189592 DOI: 10.1055/s-2002-33476] [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: 10/27/2022]
Affiliation(s)
- I Miwa
- Department of Pathobiochemistry, Faculty of Pharmacy, Meijo University, Nagoya-shi, Aichi, Japan
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Abstract
Automated multiple development thin layer chromatography (AMD-TLC) was used for separation of calystegines, a class of nortropane alkaloids, and of precursors of their biosynthesis. The calystegines differ in the number of hydroxyl groups at the nortropane ring system and in the substitution pattern. A combination of TLC methods allows the separation of the individual calystegines and separation of possible precursors of the biosynthesis. Solvent combination, development time, the number of development steps, the drying time between each run and the preconditioning parameters of the silica gel TLC plates were optimised. Limits of detection were evaluated for several detection reagents.
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Affiliation(s)
- Y Scholl
- Martin-Luther-University Halle-Wittenberg, Institute of Pharmaceutical Biology, Halle/Saale, Germany
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Asano N, Yamashita T, Yasuda K, Ikeda K, Kizu H, Kameda Y, Kato A, Nash RJ, Lee HS, Ryu KS. Polyhydroxylated alkaloids isolated from mulberry trees (Morusalba L.) and silkworms (Bombyx mori L.). J Agric Food Chem 2001; 49:4208-13. [PMID: 11559112 DOI: 10.1021/jf010567e] [Citation(s) in RCA: 256] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
New polyhydroxylated alkaloids, (2R,3R,4R)-2-hydroxymethyl-3,4-dihydroxypyrrolidine-N-propionamide from the root bark of Morus alba L., and 4-O-alpha-D-galactopyranosyl-calystegine B(2) and 3 beta,6 beta-dihydroxynortropane from the fruits, were isolated by column chromatography using a variety of ion-exchange resins. Fifteen other polyhydroxylated alkaloids were also isolated. 1-Deoxynojirimycin, a potent alpha-glucosidase inhibitor, was concentrated 2.7-fold by silkworms feeding on mulberry leaves. Some alkaloids contained in mulberry leaves were potent inhibitors of mammalian digestive glycosidases but not inhibitors of silkworm midgut glycosidases, suggesting that the silkworm has enzymes specially adapted to enable it to feed on mulberry leaves. The possibility of preventing the onset of diabetes and obesity using natural dietary supplements containing 1-deoxynojirimycin and other alpha-glucosidase inhibitors in high concentration is of great potential interest.
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Affiliation(s)
- N Asano
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3 Kanagawa-machi, Kanazawa 920-1181, Japan.
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Asano N, Yokoyama K, Sakurai M, Ikeda K, Kizu H, Kato A, Arisawa M, Höke D, Dräger B, Watson AA, Nash RJ. Dihydroxynortropane alkaloids from calystegine-producing plants. Phytochemistry 2001; 57:721-6. [PMID: 11397439 DOI: 10.1016/s0031-9422(01)00131-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Three dihydroxynortropanes, 2alpha,7beta-dihydroxynortropane, 2alpha,3beta-dihydroxynortropane, and 3alpha,7beta-dihydroxynortropane, were isolated from calystegine-producing plants in the families Convolvulaceae and Solanaceae. 2alpha,7beta-Dihydroxynortropane was isolated from six species in the Convolvulaceae whereas only Calystegia soldanella contained it and 2alpha,3beta-dihydroxynortropane. Although neither of these were detectable in three species tested in the Solanaceae, 3alpha,7beta-dihydroxynortropane was, however, isolated from Duboisia leichhardtii.
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Affiliation(s)
- N Asano
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3 Kanagawa-machi, Kanazawa 920-1181, Japan.
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40
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Abstract
Sugar-mimicking alkaloids inhibit the glycosidases involved in a wide range of important biological processes, principally owing to their structural resemblance to the sugar moiety of the natural substrate. The possibility of modifying and blocking these processes by using such inhibitors for therapeutic applications has attracted a lot of attention.
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Affiliation(s)
- N Asano
- Faculty of Pharmaceudical Sciences, Hokuriku University, Kaanazawa, Japan.
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Abe T, Unno M, Onogawa T, Tokui T, Kondo TN, Nakagomi R, Adachi H, Fujiwara K, Okabe M, Suzuki T, Nunoki K, Sato E, Kakyo M, Nishio T, Sugita J, Asano N, Tanemoto M, Seki M, Date F, Ono K, Kondo Y, Shiiba K, Suzuki M, Ohtani H, Shimosegawa T, Iinuma K, Nagura H, Ito S, Matsuno S. LST-2, a human liver-specific organic anion transporter, determines methotrexate sensitivity in gastrointestinal cancers. Gastroenterology 2001; 120:1689-99. [PMID: 11375950 DOI: 10.1053/gast.2001.24804] [Citation(s) in RCA: 269] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS One approach to the development of targeted cancer chemotherapy exploits increased uptake of the agent into neoplastic cells. In this scenario, higher concentrations of the agent in cancer cells are responsible for differential killing, whereas the low concentration in normal human cells decreases side effects. The aim of this study was to isolate an organic anion transporter that is weak in normal cells, but abundantly expressed in cancer cells, to deliver the anticancer drugs to the cells. METHODS A human liver complementary DNA (cDNA) library was screened with liver-specific transporter (LST)-1 cDNA as a probe. Northern blot analyses were performed using the isolated cDNA (termed LST-2). An LST-2-specific antibody was raised, and immunohistochemical analyses including immunoelectron microscopy were performed. Xenopus oocyte expression system was used for functional analysis. We also established a permanent cell line that consistently expresses LST-2 to examine the relationship between methotrexate uptake and sensitivity. RESULTS The isolated cDNA, LST-2, has 79.7% of overall homology with human LST-1. LST-2 exclusively expressed in the liver under normal conditions and its immunoreactivity was highest at the basolateral membrane of the hepatocytes around the central vein. Although its weak expression in the liver, LST-2 is abundantly expressed in the gastric, colon, and pancreatic cancers. On the other hand, the LST-1 was only detected in a hepatic cell line. LST-2 transports methotrexate in a saturable and dose-dependent manner. Furthermore, introduction of the LST-2 gene into mammalian cells potentiates sensitivity to methotrexate. CONCLUSIONS LST-2 is one of the prime candidate molecules for determining methotrexate sensitivity and may be a good target to deliver anticancer drugs to the gastrointestinal cancers.
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Affiliation(s)
- T Abe
- Division of Nephrology, Endocrinology, and Vascular Medicine, Department of Medicine, Tohoku University School of Medicine, Sendai, Japan.
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Abstract
OBJECTIVES In Japan, regulatory intervention aimed at preventing a prospective surplus of physicians is an important medical issue. The study committees organized by the Ministry of Health and Welfare (MHW) in 1986, 1993 and 1998, concluded that the number of physicians would exceed demand for their services in the future. As a result, the government planned to reduce the number of medical students. However, MHW has not been successful in the intervention so far, as shown by the fact that their initial plan for a 10% reduction in the number of students enrolled in medical school has not been attained. In this paper, we examine why the MHW policy failed. METHODS We reviewed those forecasts performed by past MHW study committees and examined whether the government policy of controlling physician training was appropriate. Additionally, we did a preliminary projection of specialty-specific demand for physician services as a reference for future physician manpower policies in Japan. RESULTS We found that both conflicts among various interest groups and a lack of precise projections of physician services hampered the proper formation and implementation of a physician manpower policy in Japan. CONCLUSIONS It might be necessary to examine the appropriateness of the MHW policy in reducing the overall number of students enrolled in medical schools. As a first step in formulating and implementing a physician manpower policy, we should begin to consolidate the necessary data to conduct precise and proper projections of future physician demand.
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Affiliation(s)
- N Asano
- Department of Health Economics and Policy, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Fujiwara K, Adachi H, Nishio T, Unno M, Tokui T, Okabe M, Onogawa T, Suzuki T, Asano N, Tanemoto M, Seki M, Shiiba K, Suzuki M, Kondo Y, Nunoki K, Shimosegawa T, Iinuma K, Ito S, Matsuno S, Abe T. Identification of thyroid hormone transporters in humans: different molecules are involved in a tissue-specific manner. Endocrinology 2001; 142:2005-12. [PMID: 11316767 DOI: 10.1210/endo.142.5.8115] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We have recently identified that rat organic anion transporters, polypeptide2 (oatp2) and oatp3, both of which transport thyroid hormones. However, in humans the molecular organization of the organic anion transporters has diverged, and the responsible molecule for thyroid hormone transport has not been clarified, except for human liver-specific transporter (LST-1) identified by us. In this study we isolated and characterized a novel human organic anion transporter, OATP-E from human brain. The isolated complementary DNA encodes a polypeptide of 722 amino acids with 12 transmembrane domains. A rat counterpart, oatp-E, was also identified. Homology analysis and the phylogenetic tree analysis revealed that OATP-E/oatp-E is a subfamily of the organic anion transporter. Human OATP-E transported 3,3',5-triiodo-L-thyronine (K(m), 0.9 microM), thyronine, and rT(3) in a Na(+)-independent manner. Although the clone was isolated from the brain, OATP-E messenger RNA was abundantly expressed in various peripheral tissues. The rat counterpart, oatp-E, also transported 3,3',5-triiodo-L-thyronine. In addition, in this study we revealed that human OATP, which is exclusively expressed in the brain, transported 3,3',5-triiodo-L-thyronine (K(m), 6.5 microM), T(4) (K(m), 8.0 microM), and rT(3). These data suggest that in humans, several different molecules are involved in transporting thyroid hormone: OATP in the brain, LST-1 in the liver, and OATP-E in peripheral tissues.
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Affiliation(s)
- K Fujiwara
- Department of Neurophysiology, First Department of Surgery, Second Department of Internal Medicine, Tohoku University School of Medicine, Sendai 980-8575, Japan
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Martin OR, Saavedra OM, Xie F, Liu L, Picasso S, Vogel P, Kizu H, Asano N. α- and β-Homogalactonojirimycins (α- and β-Homogalactostatins) synthesis and further biological evaluation. Bioorg Med Chem 2001; 9:1269-78. [PMID: 11377185 DOI: 10.1016/s0968-0896(00)00343-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The homoiminosugars alpha- and beta-homogalactonojirimycins were prepared from a common intermediate, tetra-O-benzyl-D-galacto-heptenitol 6, by way of highly stereoselective reaction sequences involving, as the key steps, an internal amidomercuration (alpha-epimer) and a double reductive amination (beta-epimer). alpha-Homogalactonojirimycin retains a large part of the potent activity of the parent galactonojirimycin and 1-deoxygalactonojirimycin as an inhibitor of alpha-galactosidases. However, by contrast with the parent iminosugars, it does not inhibit beta-galactosidases, with the exception of the Jack beans enzyme. beta-Homogalactonojirimycin is a weak alpha-galactosidase inhibitor and is completely devoid of activity towards beta-galactosidases. Thus, a marked selectivity toward one family of enzymes has been achieved by the addition of an alpha-CH(2)OH group in the structure of the parent iminosugars.
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Affiliation(s)
- O R Martin
- Department of Chemistry, State University of New York, Binghamton, NY 13902-6016, USA.
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45
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Jakobsen P, Lundbeck JM, Kristiansen M, Breinholt J, Demuth H, Pawlas J, Candela MP, Andersen B, Westergaard N, Lundgren K, Asano N. Iminosugars: potential inhibitors of liver glycogen phosphorylase. Bioorg Med Chem 2001; 9:733-44. [PMID: 11310609 DOI: 10.1016/s0968-0896(00)00291-1] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The first synthesis of the single isomers (3R,4R,5R); (3S,4S,5S): (3R,4R,5S) and (3S,4S,5R) of 5-hydroxymethyl-piperidine-3,4-diol from Arecolin is reported, including the synthesis of a series of N-substituted derivatives of the (3R,4R,5R)-isomer (Isofagomine). The inhibitory effect of these isomers as well as of a series of N-substituted derivatives of the (3R,4R,5R)-isomer and selected hydroxypiperidine analogues on liver glycogen phosphorylase (GP) showed that the (3R,4R,5R) configuration was essential for obtaining an inhibitory effect at submicromolar concentration. The results also showed that all three hydroxy groups should be present and could not be substituted, nor were extra OH groups allowed if sub-micromolar inhibition should be obtained. Some inhibitory effect was retained for N-substituted derivatives of Isofagomine; however, N-substitution always resulted in a loss of activity compared to the parent compound, IC50 values ranging from 1 to 100 microM were obtained for simple alkyl, arylalkyl and benzoylmethyl substituents. Furthermore, we found that it was not enough to assure inhibitory effect to have the (R,R,R) configuration. Fagomine, the (2R,3R,4R)-2-hydroxymethylpiperidine-3,4-diol analogue, showed an IC50 value of 200 microM compared to 0.7 microM for Isofagomine. In addition, Isofagomine was able to prevent basal and glucagon stimulated glycogen degradation in cultured hepatocytes with IC50 values of 2-3 microM.
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Affiliation(s)
- P Jakobsen
- Medicinal Chemistry Research, Novo Nordisk A/S, Health Care Discovery, Maaloev, Denmark
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Abstract
Over one hundred polyhydroxylated alkaloids have been isolated from plants and micro-organisms. These alkaloids can be potent and highly selective glycosidase inhibitors and are arousing great interest as tools to study cellular recognition and as potential therapeutic agents. However, only three of the natural products so far have been widely studied for therapeutic potential due largely to the limited commercial availability of the other compounds.
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Affiliation(s)
- A A Watson
- Molecular Nature Limited, Aberystwyth, Cardiganshire, UK
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Asano N, Yasuda K, Kizu H, Kato A, Fan JQ, Nash RJ, Fleet GW, Molyneux RJ. Novel alpha-L-fucosidase inhibitors from the bark of Angylocalyx pynaertii (Leguminosae). Eur J Biochem 2001; 268:35-41. [PMID: 11121099 DOI: 10.1046/j.1432-1327.2001.01837.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The extract of bark of Angylocalyx pynaertii (Leguminosae) was found to potently inhibit mammalian alpha-L-fucosidases. A thorough examination of the extract resulted in the discovery of 15 polyhydroxylated alkaloids, including the known alkaloids from seeds of this plant, 1,4-dideoxy-1,4-imino-D-arabinitol (DAB), 1-deoxymannojirimycin (DMJ) and 2,5-imino-1,2,5-trideoxy-D-mannitol (6-deoxy-DMDP). Among them, eight sugar-mimic alkaloids showed the potent inhibitory activity towards bovine epididymis alpha-L-fucosidase and their Ki values are as follows: 6-deoxy-DMDP (83 microM), 2,5-imino-1,2,5-trideoxy-L-glucitol (0.49 microM), 2,5-dideoxy-2,5-imino-D-fucitol (17 microM), 2,5-imino-1,2,5-trideoxy-D-altritol (3.7 microM), DMJ (4.7 microM), N-methyl-DMJ (30 microM), 6-O-alpha-L-rhamnopyranosyl-DMJ (Rha-DMJ, 0.06 microM), and beta-L-homofuconojirimycin (beta-HFJ, 0.0053 microM). We definitively deduced the structural requirements of inhibitors of alpha-L-fucosidase for the piperidine alkaloids (DMJ derivatives). The minimum structural feature of alpha-L-fucosidase inhibitors is the correct configuration of the three hydroxyl groups on the piperidine ring corresponding to C2, C3 and C4 of L-fucose. Furthermore, the addition of a methyl group in the correct configuration to the ring carbon atom corresponding to C5 of L-fucose generates extremely powerful inhibition of alpha-L-fucosidase. The replacement of the methyl group of beta-HFJ by a hydroxymethyl group reduced its inhibitory potential about 80-fold. This suggests that there may be a hydrophobic region in or around the active site. The existence or configuration of a substituent group on the ring carbon atom corresponding to the anomeric position of L-fucose does not appear to be important for the inhibition. Interestingly, Rha-DMJ was a 70-fold more potent inhibitor of alpha-L-fucosidase than DMJ. This implies that the lysosomal alpha-L-fucosidase may have subsites recognizing oligosaccharyl structures in natural substrates.
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Affiliation(s)
- N Asano
- Faculty of Pharmaceutical Sciences, Hokuriku University, Kanagawa-machi, Kanazawa, Japan.
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Hamada S, Sutou S, Morita T, Wakata A, Asanami S, Hosoya S, Ozawa S, Kondo K, Nakajima M, Shimada H, Osawa K, Kondo Y, Asano N, Sato S, Tamura H, Yajima N, Marshall R, Moore C, Blakey DH, Schechtman LM, Weaver JL, Torous DK, Proudlock R, Ito S, Namiki C, Hayashi M. Evaluation of the rodent micronucleus assay by a 28-day treatment protocol: Summary of the 13th Collaborative Study by the Collaborative Study Group for the Micronucleus Test (CSGMT)/Environmental Mutagen Society of Japan (JEMS)-Mammalian Mutagenicity Study Group (MMS). Environ Mol Mutagen 2001; 37:93-110. [PMID: 11246216 DOI: 10.1002/em.1017] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To examine whether micronucleus tests can be incorporated into general toxicology assays, we performed micronucleus tests applying the treatment protocols typically used in such assays. In this 13th Collaborative Study of the CSGMT, both rats and mice were tested, although rats were used in the majority of the studies. Fifteen mutagens were tested in rats, mainly by oral (p.o.) administration. Micronucleus induction was evaluated 2, 3, and 4 days, and 1, 2, 3, and 28 days after the beginning of the treatment in the peripheral blood, and at 28 days in the bone marrow. Of the 15 chemicals that induced micronuclei in rats in short-term assays, two chemicals (1,2-dimethylhydrazine.2HCl and mitomycin C) were negative in all our experiments, possibly because of insufficient dose levels. The remaining 13 were positive within the estimated dose range of a general toxicology assay, suggesting the possibility of integrating the micronucleus assay into general toxicology assays. Three patterns were observed in micronucleus induction during the period of repeated treatment: (1) gradual increases in micronucleus frequency with sequential doses, (2) a peak at 3-5 days followed by gradual decreases in micronucleus frequency with sequential doses, and (3) a rapid increase in micronucleus frequency followed by a plateau. We evaluated factors that might have been involved in those patterns, such as the spleen function, target organ exposure, extramedullary hematopoiesis, hypothermia, and hypoxia. Another factor we considered was dosage. Because the dosages employed in a general toxicity assay are usually lower than those used in short-term micronucleus assays, this discrepancy was considered the greatest potential problem for integrating the micronucleus assay into general toxicology assays. Our results indicate that the integration of the micronucleus assay into a 28-day toxicological assay is feasible. To serve this purpose, blood samples collected 4 days after the beginning of treatment and blood and bone marrow samples collected at autopsy should be examined. Furthermore, although it is recognized that mice may be suitable for performing independent micronucleus assays, we propose that rats can provide biologically important and relevant information regarding potential chemical mutagens that can be evaluated under conditions used in the conduct of general toxicology studies.
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Affiliation(s)
- S Hamada
- Central Research Laboratory, SSP Company, Ltd., Chiba, Japan.
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49
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Hirota M, Hidaka E, Ueno I, Ishikawa M, Asano N, Yamauchi K, Ishida F, Tozuka M, Katsuyama T. Novel BCR-ABL transcript containing an intronic sequence insert in a patient with Philadelphia-positive acute lymphoblastic leukaemia. Br J Haematol 2000; 110:867-70. [PMID: 11054070 DOI: 10.1046/j.1365-2141.2000.02205.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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]
Abstract
In a patient with Philadelphia chromosome-positive acute lymphoblastic leukaemia (ALL), a novel variant of the chimaeric BCR-ABL mRNA transcript was detected by reverse transcription polymerase chain reaction (RT-PCR). Sequencing revealed the novel transcript to be a chimaeric mRNA produced by fusion of the BCR exon 14 (b3) to the ABL exon a2 with a 49-base pair (bp) insertion of an ABL intron 1b sequence between them. The insertion of the 49 bp introduced a stop codon. These data show that this variant of the chimaeric mRNA would not be translated into the p210 BCR-ABL protein. This could be one of the explanations as to why clinically the patient has responded well to therapy and continues to follow a mild clinical course.
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Affiliation(s)
- M Hirota
- Central Clinical Laboratories, Shinshu University Hospital, Asahi, Matsumoto, Japan
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50
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Abstract
Alkaloids mimicking the structures of sugars inhibit glycosidases because of a structural resemblance to the sugar moiety of the natural substrate. Glycosidases are involved in a wide range of important biological processes, such as intestinal digestion, post-translational processing of glycoproteins and the lysosomal catabolism of glycoconjugates. The realization that alkaloidal sugar mimics might have enormous therapeutic potential in many diseases such as viral infection, cancer and diabetes led to increasing interest and demand for these compounds. In this review, the structural basis of the specificity of alkaloidal sugar mimics and their current and potential applications to biomedical problems are reviewed.
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Affiliation(s)
- N Asano
- Faculty of Pharmaceutical Sciences, Hokuriku University, Kanazawa, Japan.
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