1
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Nozaki H, Honma M, Tanino H, Ishida-Yamamoto A. Characteristics of osteonecrosis of the femoral head complicated by psoriasis. J Dermatol 2024; 51:e42-e43. [PMID: 37698051 DOI: 10.1111/1346-8138.16959] [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: 05/01/2023] [Revised: 07/30/2023] [Accepted: 08/27/2023] [Indexed: 09/13/2023]
Affiliation(s)
- Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masaru Honma
- Center for promotion of International Exchange, Asahikawa Medical University, Asahikawa, Japan
| | - Hiromasa Tanino
- Department of Orthopedic Surgery, Asahikawa Medical University, Asahikawa, Japan
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2
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Honma M, Nozaki H, Hayashi K, Iinuma S, Ishida-Yamamoto A. Palmoplantar pustulosis emerged on a case of generalized pustular psoriasis successfully treated by secukinumab. J Dermatol 2019; 46:e468-e469. [PMID: 31502309 DOI: 10.1111/1346-8138.15082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Masaru Honma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Kei Hayashi
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Shin Iinuma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
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3
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Nozaki H, Iinuma S, Takahashi N, Nakagawa T, Fujii M, Honma M, Takahashi C, Kato N, Ishida-Yamamoto A. Streptococcus bovis
infective endocarditis presenting as cutaneous arteritis. J Dermatol 2018; 46:e103-e104. [DOI: 10.1111/1346-8138.14624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroyoshi Nozaki
- Department of Dermatology; Wakkanai City Hospital; Wakkanai Japan
| | - Shin Iinuma
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | | | - Tomoe Nakagawa
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Mizue Fujii
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Masaru Honma
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Chiaki Takahashi
- Department of Dermatology; Wakkanai City Hospital; Wakkanai Japan
| | - Naoki Kato
- Department of Dermatology; Wakkanai City Hospital; Wakkanai Japan
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4
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Kishibe M, Nozaki H, Fujii M, Iinuma S, Ohtsubo S, Igawa S, Kanno K, Honma M, Kishibe K, Okamoto K, Ishida-Yamamoto A. Severe thiopurine-induced leukocytopenia and hair loss in Japanese patients with defectiveNUDT15 variant: Retrospective case-control study. J Dermatol 2018; 45:1160-1165. [DOI: 10.1111/1346-8138.14588] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 07/03/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Mari Kishibe
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Hiroyoshi Nozaki
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Mizue Fujii
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Shin Iinuma
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Sawa Ohtsubo
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Satomi Igawa
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Kyoko Kanno
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Masaru Honma
- Department of Dermatology; Asahikawa Medical University; Asahikawa Japan
| | - Kan Kishibe
- Department of Otorhinolaryngology; Asahikawa Medical University; Asahikawa Japan
| | - Kensaku Okamoto
- Division of Metabolism and Biosystemic Science; Department of Medicine; Asahikawa Medical University; Asahikawa Japan
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5
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Saito N, Minami-Hori M, Nagahata H, Nozaki H, Iinuma S, Igawa S, Kanno K, Kishibe M, Kanazawa N, Ishida-Yamamoto A. Novel PSTPIP1 gene mutation in pyoderma gangrenosum, acne and suppurative hidradenitis syndrome. J Dermatol 2018; 45:e213-e214. [PMID: 29575118 DOI: 10.1111/1346-8138.14259] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Nao Saito
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masako Minami-Hori
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroko Nagahata
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Shin Iinuma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Satomi Igawa
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Kyoko Kanno
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Mari Kishibe
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Nobuo Kanazawa
- Department of Dermatology, Wakayama Medical University, Wakayama, Japan
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6
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Konno T, Yoshida K, Mizuta I, Mizuno T, Kawarai T, Tada M, Nozaki H, Ikeda SI, Onodera O, Wszolek ZK, Ikeuchi T. Diagnostic criteria for adult-onset leukoencephalopathy with axonal spheroids and pigmented glia due to CSF1R mutation. Eur J Neurol 2017; 25:142-147. [PMID: 28921817 DOI: 10.1111/ene.13464] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [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: 05/15/2017] [Accepted: 09/07/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND PURPOSE To establish and validate diagnostic criteria for adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) due to colony-stimulating factor 1 receptor (CSF1R) mutation. METHODS We developed diagnostic criteria for ALSP based on a recent analysis of the clinical characteristics of ALSP. These criteria provide 'probable' and 'possible' designations for patients who do not have a genetic diagnosis. To verify its sensitivity and specificity, we retrospectively applied our criteria to 83 ALSP cases who had CSF1R mutations (24 of these were analyzed at our institutions and the others were identified from the literature), 53 cases who had CSF1R mutation-negative leukoencephalopathies and 32 cases who had cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) with NOTCH3 mutations. RESULTS Among the CSF1R mutation-positive cases, 50 cases (60%) were diagnosed as 'probable' and 32 (39%) were diagnosed as 'possible,' leading to a sensitivity of 99% if calculated as a ratio of the combined number of cases who fulfilled 'probable' or 'possible' to the total number of cases. With regard to specificity, 22 cases (42%) with mutation-negative leukoencephalopathies and 28 (88%) with CADASIL were correctly excluded using these criteria. CONCLUSIONS These diagnostic criteria are very sensitive for diagnosing ALSP with sufficient specificity for differentiation from CADASIL and moderate specificity for other leukoencephalopathies. Our results suggest that these criteria are useful for the clinical diagnosis of ALSP.
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Affiliation(s)
- T Konno
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.,Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - K Yoshida
- Department of Brain Disease Research, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - I Mizuta
- Department of Neurology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
| | - T Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
| | - T Kawarai
- Department of Clinical Neuroscience, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - M Tada
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - H Nozaki
- Department of Medical Technology, School of Health Sciences Faculty of Medicine, Niigata University, Niigata, Japan
| | - S-I Ikeda
- Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - O Onodera
- Department of Neurology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Z K Wszolek
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - T Ikeuchi
- Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
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7
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Mezaki N, Miura T, Ogaki K, Eriguchi M, Mizuno Y, Komatsu K, Yamazaki H, Ono N, Kawajiri S, Yamasaki R, Nozaki H, Kasuga K, Okuma Y, Kira J, Hara H, Onodera O, Ikeuchi T. LMNB1-related adult-onset autosomal dominant leukodystrophy: Genetic and clinical studies of four Japanese families. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3499] [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: 10/18/2022]
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8
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Iwasaki T, Nozaki H, Saito T, Igawa S, Kanno K, Kishibe M, Minami-Hori M, Honma M, Ito S, Ishida-Yamamoto A. Extensive auricular necroses as an initial symptom of cryofibrinogenemia occurring secondary to gastric diffuse large B-cell lymphoma. J Dermatol 2017; 44:e258-e259. [PMID: 28664978 DOI: 10.1111/1346-8138.13924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Takeshi Iwasaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Takefumi Saito
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Satomi Igawa
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Kyoko Kanno
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Mari Kishibe
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masako Minami-Hori
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masaru Honma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Satoshi Ito
- Department of Hematology and Oncology, Asahikawa Medical University, Asahikawa, Japan
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9
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Grochau-Wright ZI, Hanschen ER, Ferris PJ, Hamaji T, Nozaki H, Olson BJSC, Michod RE. Genetic basis for soma is present in undifferentiated volvocine green algae. J Evol Biol 2017; 30:1205-1218. [PMID: 28425150 PMCID: PMC5540444 DOI: 10.1111/jeb.13100] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 02/26/2017] [Accepted: 04/14/2017] [Indexed: 01/21/2023]
Abstract
Somatic cellular differentiation plays a critical role in the transition from unicellular to multicellular life, but the evolution of its genetic basis remains poorly understood. By definition, somatic cells do not reproduce to pass on genes and so constitute an extreme form of altruistic behaviour. The volvocine green algae provide an excellent model system to study the evolution of multicellularity and somatic differentiation. In Volvox carteri, somatic cell differentiation is controlled by the regA gene, which is part of a tandem duplication of genes known as the reg cluster. Although previous work found the reg cluster in divergent Volvox species, its origin and distribution in the broader group of volvocine algae has not been known. Here, we show that the reg cluster is present in many species without somatic cells and determine that the genetic basis for soma arose before the phenotype at the origin of the family Volvocaceae approximately 200 million years ago. We hypothesize that the ancestral function was involved in regulating reproduction in response to stress and that this function was later co-opted to produce soma. Determining that the reg cluster was co-opted to control somatic cell development provides insight into how cellular differentiation, and with it greater levels of complexity and individuality, evolves.
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Affiliation(s)
- Z I Grochau-Wright
- Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA
| | - E R Hanschen
- Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA
| | - P J Ferris
- Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA
| | - T Hamaji
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo, Japan
| | - H Nozaki
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo, Japan
| | - B J S C Olson
- Division of Biology, Kansas State University, Manhattan, KS, USA
| | - R E Michod
- Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA
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10
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Honma M, Nozaki H, Nagahata H, Fujii M, Shibuya T, Kanno K, Minami-Hori M, Ishida-Yamamoto A. Serum carcinoembryonic antigen specifically increases among various serum markers of adenocarcinoma in hypohidrosis or conditions related to hypohidrosis. J Dermatol 2017; 44:903-908. [PMID: 28295553 DOI: 10.1111/1346-8138.13828] [Citation(s) in RCA: 2] [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] [Received: 11/09/2016] [Accepted: 02/06/2017] [Indexed: 01/13/2023]
Abstract
Anhidrosis/hypohidrosis are conditions presenting various level of sweating dysfunction. Among them, acquired idiopathic generalized anhidrosis (AIGA) presents inadequate decrease or loss of sweating without apparent neurological and dermatological symptoms except cholinergic urticaria. Recently, serum level of carcinoembryonic antigen (CEA), one of the most well-known tumor markers, has been proposed as a clinical marker reflecting activity of AIGA. This study was performed to verify the specificity and independence of serum CEA level from the other serum tumor markers especially related to adenocarcinoma. The expression of various tumor markers in the serum collected from three healthy control subjects, four AIGA cases, and a cholinergic urticaria (CU) case with elevation of serum CEA level and history of hyperthermia was analyzed using a membrane-based antibody array. In all AIGA and CU cases, the intensity of CEA was significantly increased (7.60-15.9 times compared with that of control), relatively well-reflecting the serum CEA level, and the mean intensity of CEA was 11.8 times higher than the control subjects (P = 0.0011). On the other hand, the ratio of carbohydrate antigen (CA)125 and CA19-9 was 1.93 and 0.23 times compared with the mean intensity of the control subjects, respectively, and there was no statistical significance. Immunohistochemistry on 10 AIGA cases showed increased expression of CEA but not CA19-9 and CA125 in the eccrine sweat glands. In conclusion, the elevation of serum CEA level was independent from the other tumor markers in hypohidrotic condition represented by AIGA.
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Affiliation(s)
- Masaru Honma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroko Nagahata
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Mizue Fujii
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Takashi Shibuya
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Kyoko Kanno
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masako Minami-Hori
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
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11
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Nozaki H, Kishibe M, Kanno K, Igawa S, Saito T, Shimamura T, Minami-Hori M, Honma M, Ishida-Yamamoto A. Anticentriole antibody-positive limited cutaneous systemic sclerosis. J Dermatol 2017; 44:e119-e120. [PMID: 28186355 DOI: 10.1111/1346-8138.13754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Mari Kishibe
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Kyoko Kanno
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Satomi Igawa
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Takefumi Saito
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Tomoe Shimamura
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masako Minami-Hori
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masaru Honma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
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12
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Honma M, Nozaki H, Nagahata H, Fujii M, Kanno K, Minami-Hori M, Ishida-Yamamoto A. Elevation of serum carcinoembryonic antigen in a case of cholinergic urticaria with failed detection of hypohidrosis by the conventional starch-iodine test. J Dermatol 2016; 44:e38-e39. [PMID: 27864842 DOI: 10.1111/1346-8138.13689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masaru Honma
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroyoshi Nozaki
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Hiroko Nagahata
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Mizue Fujii
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Kyoko Kanno
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
| | - Masako Minami-Hori
- Department of Dermatology, Asahikawa Medical University, Asahikawa, Japan
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13
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Konno T, Yoshida K, Mizuno T, Kawarai T, Tada M, Nozaki H, Ikeda SI, Nishizawa M, Onodera O, Wszolek ZK, Ikeuchi T. Clinical and genetic characterization of adult-onset leukoencephalopathy with axonal spheroids and pigmented glia associated with CSF1R mutation. Eur J Neurol 2016; 24:37-45. [PMID: 27680516 PMCID: PMC5215554 DOI: 10.1111/ene.13125] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [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: 04/14/2016] [Accepted: 08/09/2016] [Indexed: 01/13/2023]
Abstract
Background and purpose The clinical characteristics of colony stimulating factor 1 receptor (CSF1R) related adult‐onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP) have been only partially elucidated. Methods Clinical data from CSF1R mutation carriers who had been seen at our institutions or reported elsewhere were collected and analysed using a specific investigation sheet to standardize the data. Results In all, 122 cases from 90 families with CSF1R mutations were identified. The mean age of onset was 43 years (range 18–78 years), the mean age at death was 53 years (range 23–84 years) and the mean disease duration was 6.8 years (range 1–29 years). Women had a significantly younger age of onset than men (40 vs. 47 years, P = 0.0006, 95% confidence interval 3.158–11.177). There was an age‐dependent penetrance that was significantly different between the sexes (P = 0.0013). Motor dysfunctions were the most frequent initial symptom in women whose diseases began in their 20s. Thinning of the corpus callosum, abnormal signalling in pyramidal tracts, diffusion‐restricted lesions and calcifications in the white matter were characteristic imaging findings of ALSP. The calcifications were more frequently reported in our case series than in the literature (54% vs. 3%). Seventy‐nine per cent of the mutations were located in the distal part of the tyrosine kinase domain of CSF1R (102 cases). There were no apparent phenotype−genotype correlations. Conclusions The characteristics of ALSP were clarified. The phenotype of ALSP caused by CSF1R mutations is affected by sex.
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Affiliation(s)
- T Konno
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.,Department of Neurology, Niigata University, Niigata, Japan
| | - K Yoshida
- Department of Brain Disease Research, Shinshu University School of Medicine, Matsumoto, Japan
| | - T Mizuno
- Department of Neurology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - T Kawarai
- Department of Clinical Neuroscience, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - M Tada
- Department of Neurology, Niigata University, Niigata, Japan
| | - H Nozaki
- Department of Medical Technology, School of Health Sciences Faculty of Medicine, Niigata University, Niigata, Japan
| | - S-I Ikeda
- Department of Medicine (Neurology and Rheumatology), Shinshu University School of Medicine, Matsumoto, Japan
| | - M Nishizawa
- Department of Neurology, Niigata University, Niigata, Japan
| | - O Onodera
- Department of Molecular Neuroscience, Niigata University, Niigata, Japan
| | - Z K Wszolek
- Department of Neurology, Mayo Clinic, Jacksonville, FL, USA
| | - T Ikeuchi
- Department of Molecular Genetics, Brain Research Institute, Niigata University, Niigata, Japan
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14
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Konno T, Broderick DF, Mezaki N, Isami A, Kaneda D, Tashiro Y, Tokutake T, Keegan BM, Woodruff BK, Miura T, Nozaki H, Nishizawa M, Onodera O, Wszolek ZK, Ikeuchi T. Diagnostic Value of Brain Calcifications in Adult-Onset Leukoencephalopathy with Axonal Spheroids and Pigmented Glia. AJNR Am J Neuroradiol 2016; 38:77-83. [PMID: 27633805 DOI: 10.3174/ajnr.a4938] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 07/20/2016] [Indexed: 11/07/2022]
Abstract
Adult-onset leukoencephalopathy with axonal spheroids and pigmented glia is a rare neurodegenerative disease resulting from mutations in the colony stimulating factor 1 receptor gene. Accurate diagnosis can be difficult because the associated clinical and MR imaging findings are nonspecific. We present 9 cases with intracranial calcifications distributed in 2 brain regions: the frontal white matter adjacent to the anterior horns of the lateral ventricles and the parietal subcortical white matter. Thin-section (1-mm) CT scans are particularly helpful in detection due to the small size of the calcifications. These calcifications had a symmetric "stepping stone appearance" in the frontal pericallosal regions, which was clearly visible on reconstructed sagittal CT images. Intrafamilial variability was seen in 2 of the families, and calcifications were seen at birth in a single individual. These characteristic calcification patterns may assist in making a correct diagnosis and may contribute to understanding of the pathogenesis of leukoencephalopathy.
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Affiliation(s)
- T Konno
- From the Departments of Neurology (T.K., Z.K.W.).,Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - D F Broderick
- Radiology (D.F.B.), Mayo Clinic Florida, Jacksonville, Florida
| | - N Mezaki
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - A Isami
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - D Kaneda
- Department of Neurology (D.K.), Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan.,Department of Neurology (D.K.), Osaka Red Cross Hospital, Osaka, Japan
| | - Y Tashiro
- Department of Neurology (Y.T.), National Hospital Organization Mito Medical Center, Ibaraki, Japan
| | - T Tokutake
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - B M Keegan
- Department of Neurology (B.M.K.), Mayo Clinic Rochester, Rochester, Minnesota
| | - B K Woodruff
- Department of Neurology (B.K.W.), Mayo Clinic Arizona, Scottsdale, Arizona
| | - T Miura
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - H Nozaki
- Medical Technology (H.N.), School of Health Sciences Faculty of Medicine, Niigata University, Niigata, Japan
| | - M Nishizawa
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - O Onodera
- Departments of Neurology (T.K., N.M., A.I., T.T., T.M., M.N., O.O.)
| | - Z K Wszolek
- From the Departments of Neurology (T.K., Z.K.W.)
| | - T Ikeuchi
- Molecular Genetics (T.I.), Brain Research Institute
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Månsson M, Umegaki I, Nozaki H, Higuchi Y, Kawasaki I, Watanabe I, Sakurai H, Sugiyama J. Na-ion dynamics in Quasi-1D compound NaV2O4. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/551/1/012035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Månsson M, Nozaki H, Wikberg JM, Prša K, Sassa Y, Dahbi M, Kamazawa K, Sedlak K, Watanabe I, Sugiyama J. Lithium Diffusion & Magnetism in Battery Cathode Material LixNi1/3Co1/3Mn1/3O2. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/551/1/012037] [Citation(s) in RCA: 9] [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: 11/11/2022]
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Shimizu T, Nozaki H, Tokuda Y. Steinert's disease. Case Reports 2013; 2013:bcr-2013-201846. [DOI: 10.1136/bcr-2013-201846] [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: 11/03/2022] Open
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Nishimoto Y, Shibata M, Nihonmatsu M, Nozaki H, Shiga A, Shirata A, Yamane K, Kosakai A, Takahashi K, Nishizawa M, Onodera O, Suzuki N. A novel mutation in the HTRA1 gene causes CARASIL without alopecia. Neurology 2011; 76:1353-5. [PMID: 21482952 DOI: 10.1212/wnl.0b013e318215281d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Y Nishimoto
- Department of Neurology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
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Hara K, Shiga A, Nozaki H, Mitsui J, Takahashi Y, Ishiguro H, Yomono H, Kurisaki H, Goto J, Ikeuchi T, Tsuji S, Nishizawa M, Onodera O. Total deletion and a missense mutation of ITPR1 in Japanese SCA15 families. Neurology 2008; 71:547-51. [PMID: 18579805 DOI: 10.1212/01.wnl.0000311277.71046.a0] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Spinocerebellar ataxia type 15 (SCA15) is a progressive neurodegenerative disorder characterized by pure cerebellar ataxia, very slow progression, and distinct cerebellar atrophy. The locus for SCA15 was first mapped to 3p24.2-3pter in an Australian family. We have subsequently mapped two Japanese families presenting with ataxia and postural tremor of the head, arm, or trunk to the SCA15 locus. Recently, partial deletions involving both the type 1 inositol 1,4,5-triphosphate receptor (ITPR1) and sulfatase modifying factor 1 (SUMF1) genes have been identified in Australian and British families with SCA15. METHODS We conducted fine haplotype analysis on the region including ITPR1. To identify the deletion, we conducted gene dosage analysis and array-based comparative genomic hybridization (aCGH) analysis. Gene expression analysis was performed using quantitative real-time reverse transcription PCR. Mutational analyses of ITPR1 and SUMF1 were also performed. RESULTS We have identified a 414-kb deletion including the entire ITPR1 and exon 1 of SUMF1 in patients in family A. The expression levels of ITPR1 and SUMF1 mRNAs of the patient were half those of the normal control. Furthermore, in family B, we have identified a C-to-T substitution at position 8581 of ITPR1, resulting in the amino acid substitution of leucine for proline at codon 1059, which is highly conserved among species. CONCLUSIONS Our results strongly confirm that ITPR1 is the causative gene for SCA15 and suggest that we need to investigate the point mutation in ITPR1 in the patients with autosomal dominant cerebellar ataxia and tremor.
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Affiliation(s)
- K Hara
- Department of Molecular Neuroscience, Center for Bioresource-based Researches, Brain Research Institute, Niigata University, 1-757, Asahi-machi-dori, Niigata City 951-8585, Japan
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Mukai K, Ikedo Y, Nozaki H, Sugiyama J, Nishiyama K, Andreica D, Amato A, Russo PL, Ansaldo EJ, Brewer JH, Chow KH, Ariyoshi K, Ohzuku T. Magnetic phase diagram of layered cobalt dioxide LixCoO2. Phys Rev Lett 2007; 99:087601. [PMID: 17930981 DOI: 10.1103/physrevlett.99.087601] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Received: 12/03/2006] [Indexed: 05/25/2023]
Abstract
The magnetism of LixCoO2 (LCO), which has a similar structure to NaxCoO2 (NCO), has been investigated by muon-spin spectroscopy and susceptibility measurements using samples with x=0.1-1 prepared by an electrochemical reaction. In the x range below 0.75, LCO was found to be Pauli paramagnetic down to 1.8 K, suggesting an intermediate- or weak-coupling regime, although disordered local moments, with volume fractions below approximately 20%, appear at low T for LCO with x > or = 0.5. The phase diagram and interactions of LCO are thus strikingly different from NCO, while the differences cannot be explained simply by structural differences between the two systems.
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Affiliation(s)
- K Mukai
- Toyota Central Research and Development Labs Inc, Nagakute, Aichi, Japan
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Nozaki H, Iseki M, Hasegawa M, Misawa K, Nakada T, Sasaki N, Watanabe M. Phylogeny of Primary Photosynthetic Eukaryotes as Deduced from Slowly Evolving Nuclear Genes. Mol Biol Evol 2007. [DOI: 10.1093/molbev/msm164] [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: 11/15/2022] Open
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Sugiyama J, Nozaki H, Ikedo Y, Mukai K, Andreica D, Amato A, Brewer JH, Ansaldo EJ, Morris GD, Takami T, Ikuta H. Evidence of two dimensionality in quasi-one-dimensional cobalt oxides. Phys Rev Lett 2006; 96:197206. [PMID: 16803139 DOI: 10.1103/physrevlett.96.197206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Indexed: 05/10/2023]
Abstract
The quasi-one-dimensional (Q1D) cobalt oxides A(N + 2)Co(n + 1)O(3n + 3) (A = Ca, Sr, and Ba, n = 1 - infinity) were investigated by muon-spin spectroscopy under applied pressures of up to 1.1 GPa. The relationship between the onset Néel temperature T(on)(N) and the interchain distance (d(ic)), which increases monotonically with n, is well fitted by the formula T(N)/T(N,0) = (1 - d(ic)/d(ic,o)(beta), here for T(on)(N) approximately 100 K for Ca(3)Co(2)O(6) (n = 1) and approximately 15 for BaCoCoO(3) (n = infinity at ambient P. The T(on)(N) - d(ic) curve also predicts a large dependence of Y(N) for the compounds with n > or = 5, i.e., in the vicinity of , while the compounds show only a very small effect. Indeed, our high-pressure mu(+) results show that of BaCoO(3) is enhanced by with a slope of 2.2 K(Gpa), whereas no detectable changes by P for both Ca(3)Co(2)O(6) and Sr(4)Co(3)O(9) (n = 2). This clearly confirms the role of the 2D-antiferromagnetic interaction on T(on)(N) in the Q1D cobalt oxides.
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Affiliation(s)
- J Sugiyama
- Toyota Central Research and Development Labs, Inc., Nagakute, Aichi, Japan
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Matsubara K, Fukaya T, Miwa K, Shibayama N, Nigami H, Harigaya H, Nozaki H, Hirata T, Baba K, Suzuki T, Ishiguro A. Development of serum IgM antibodies against superantigens of Staphylococcus aureus and Streptococcus pyogenes in Kawasaki disease. Clin Exp Immunol 2006; 143:427-34. [PMID: 16487241 PMCID: PMC1809617 DOI: 10.1111/j.1365-2249.2006.03015.x] [Citation(s) in RCA: 52] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
To serologically determine the association of microbial superantigens and the pathogenesis of Kawasaki disease (KD), we conducted a case-control study. Serum IgG and IgM antibodies against staphylococcal enterotoxin A (SEA), SEB, SEC, toxic shock syndrome toxin-1 (TSST-1), and streptococcal pyrogenic exotoxin A (SPEA) were measured by an enzyme-linked immunosorbent assay in 293 serum samples from 65 KD patients on clinical days 1-28 and 120 control samples. The administration of immunoglobulin products, which contain high concentrations of IgG antibodies against all the superantigens, directly elevated antitoxin IgG antibodies in KD patients. In contrast, antitoxin IgM antibodies were not detected in immunoglobulin products. Actually, we found a significant elevation of IgM antibodies against SEA in KD patients in the first (median titre: 0.020, P < 0.01 versus control), second (0.024, P < 0.001), third (0.030, P < 0.001) and fourth (0.038, P < 0.001) weeks, compared to the controls (0.015). Significant differences of IgM antibodies were also true for SEB, TSST-1, and SPEA throughout the first to fourth weeks, and for SEC throughout the second to fourth weeks. The prevalence of KD patients having high IgM titres (> mean + 2SD of control values) to the 5 superantigens was increased with the clinical weeks, and reached 29-43% of KD subjects at the fourth week. This is the first study that describes kinetics of IgM antibodies against superantigens and clarifies the serological significance throughout the clinical course of KD. Our results suggest that multiple superantigens involve in the pathogenesis of KD.
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Affiliation(s)
- K Matsubara
- Department of Paediatrics, Nishi-Kobe Medical Centre, 5-7-1 Kojidai, Nishi-ku, Kobe 651-2273, Japan.
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Sugiyama J, Nozaki H, Ikedo Y, Mukai K, Brewer JH, Ansaldo EJ, Morris GD, Andreica D, Amato A, Fujii T, Asamitsu A. Static magnetic order in metallic K0.49CoO2. Phys Rev Lett 2006; 96:037206. [PMID: 16486764 DOI: 10.1103/physrevlett.96.037206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2005] [Indexed: 05/06/2023]
Abstract
By means of muon-spin spectroscopy, we have found that K0.49CoO2 crystals undergo successive magnetic transitions from a high-T paramagnetic state to a magnetic ordered state below 60 K and then to a second ordered state below 16 K, even though K0.49CoO2 is metallic at least down to 4 K. An isotropic magnetic behavior and wide internal-field distributions suggest the formation of a commensurate helical spin density wave (SDW) state below 16 K, while a linear SDW state is likely to exist above 16 K. It was also found that exhibits a further transition at 150 K presumably due to a change in the spin state of the Co ions. Since the dependence of the internal-field below 60 K was similar to that for Na0.5CoO2, this suggests that magnetic order is more strongly affected by the Co valence than by the interlayer distance or interaction and/or the charge ordering.
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Affiliation(s)
- J Sugiyama
- Toyota Central Research and Development Labs, Inc., Nagakute, Aichi 480-1192, Japan.
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Abstract
Large intracytoplasmic inclusions were observed in hepatocytes of a 7-year-old African elephant (Loxodonta africana). The inclusions were oval to polyhedral with either a homogeneous glassy or a granular appearance. They were positive for the periodic acid-Schiff (PAS) reaction. Electron microscopical examination revealed that the inclusions consisted of granular material with moderate electron-density and were membrane-bounded. The findings suggested that the inclusions were derived from endoplasmic reticulum. The light and electron microscopical features were similar to those of endoplasmic reticulum storage disease of the liver in man. Such inclusions have not previously been reported in animals.
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Affiliation(s)
- M Yamada
- National Institute of Animal Health, Kannondai, Tsukuba, Ibaraki, 305-0856, Japan
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Nozaki H, Kawanisi M, Okazaki M, Yamae M, Nisikawa Y, Hisida T, Sisido K. Halogen Migration in the Reaction of Organic Dihalides with Aluminum Chloride1. J Org Chem 2002. [DOI: 10.1021/jo01015a542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Takai K, Tagashira M, Kuroda T, Oshima K, Utimoto K, Nozaki H. Reactions of alkenylchromium reagents prepared from alkenyl trifluoromethanesulfonates (triflates) with chromium(II) chloride under nickel catalysis. J Am Chem Soc 2002; 108:6048-50. [DOI: 10.1021/ja00279a068] [Citation(s) in RCA: 381] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
OBJECT Neurosurgically induced temporary occlusion of intracranial arteries carries the risk of cerebral ischemic damage. Because negative shifts in the cortical direct-current (DC) potential indicate tissue depolarization and, thus, critical ischemic stress, the authors hypothesized that recordings of these potentials could help to determine the optimal duration and frequency of induced intermittent focal ischemia to prevent brain injury. The investigators related the results of DC recordings both to simultaneously recorded decreases in extracellular Ca++ concentration ([Ca++]o), which reflect Ca++ entry into cells, and to histological outcome. METHODS In cats anesthetized with halothane the effects of intermittent brief (10 minutes long, six times [6 x 10-min group]) and prolonged (20 minutes long, three times [3 x 20-min group]) episodes of middle cerebral artery occlusions were compared with those of a single continuous episode (1 x 60-min group). Laser Doppler flow probes and ion-selective microelectrodes were used to measure cerebral blood flow, DC potentials, and [Ca++]o in cortical tissues of ectosylvian gyri. Negative shifts in DC potential were evaluated in the three groups during the entire 60-minute-long period of ischemia and were smallest in the 6 x 10-min group, larger in the 3 x 20-min group, and largest in the 1 x 60-min group. Accordingly, infarct volumes were smallest in the 6 x 10-min group, intermediate in the 3 x 20-min group, and largest in the 1 x 60-min group. Decreases in ischemic [Ca++]o were significantly greater in the 1 x 60-min group than in the two groups in which there were repetitive occlusions, and recovery of [Ca++]o after reperfusion normalized only in the 1 x 60-min group. CONCLUSIONS The DC potential may provide a reliable measure to optimize intermittent ischemia and to achieve minimal ischemic brain injury during temporary neurosurgical occlusion of cerebral arteries.
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Affiliation(s)
- T Sakaki
- Max-Planck-Institut für neurologische Forschung, Cologne, Germany
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Hayashi K, Ogino K, Oono Y, Uchimiya H, Nozaki H. Yokonolide A, a new inhibitor of auxin signal transduction, from Streptomyces diastatochromogenes B59. J Antibiot (Tokyo) 2001; 54:573-81. [PMID: 11560376 DOI: 10.7164/antibiotics.54.573] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bio-probes that inhibit the action of auxin are useful tools for the study of auxin signaling. To screen for specific inhibitors of auxin signaling, we used an Arabidopsis transgenic line harboring the auxin-inducible promoter derived from PS-IAA4/5 and the reporter gene, GUS (beta-glucuronidase). In this transgenic plant, the exogenous auxin specifically enhanced the expression of the GUS reporter gene. A novel 22-membered spiroketal-macrolide, yokonolide A (1), and related previously known compound, A82548A (2), were isolated from Streptomyces diastatochromogenes B59 as inhibitors of auxin inducible gene expression. The absolute structure of I was determined by detailed spectral analyses and chemical derivatization. 1 and 2 completely inhibited the auxin-induced transcription of the reporter gene at 5 and 1 microm, respectively. In contrast, 1 and 2 did not affect the translation of GUS reporter transcripts. In addition, 1 and 2 did not inhibit the gibberellin-induced alpha-amylase expression at 100 microM in barley aleurone cells. These results suggest that 1 and 2 specifically inhibit auxin signaling leading to auxin-mediated gene expression.
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Affiliation(s)
- K Hayashi
- Department of Biochemistry, Okayama University of Science, Japan.
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Kamata Y, Endo K, Nozaki H, Fujiwara A, Yasumasu I. Morphogenesis of exogut isolated from vegetalised embryo of sea urchin. ZYGOTE 2001; 8 Suppl 1:S84. [PMID: 11191335] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Affiliation(s)
- Y Kamata
- Advanced Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
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Yoshimoto O, Kato M, Soda K, Nozaki H, Takeuchi T, Mizutani U, Kato M, Nishino Y, Imada S, Suga S, Matsushita T, Saitoh Y. Magnetic circular dichroism at transition metal L2,3 edges in D03-type (Fe(1-x)Vx)3Al alloys. J Synchrotron Radiat 2001; 8:457-459. [PMID: 11512813 DOI: 10.1107/s0909049500016927] [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] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 11/10/2000] [Indexed: 05/23/2023]
Abstract
Magnetic circular dichroism (MCD) spectra have been measured at the Fe and V L2,3 edges of DO3-type (Fe(1-x)Vx)3Al in order to investigate their local magnetic moments and electronic structures. Large MCD is observed at the Fe L2,3 edges, while the V L2,3 MCD shows relatively small intensity with complicated features. Signs of these MCD spectra indicate an antiferromagnetic coupling between the magnetic moments on Fe and V. According to the analysis based on the magneto-optical sum rules, the magnetic moment decreases with x, but remains fairly large for Fe2VAl, which might arise from its marginally magnetic nature.
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Affiliation(s)
- O Yoshimoto
- Graduate School of Engineering, Nagoya University, Japan
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Soda K, Yoshimoto O, Nozaki H, Takeuchi T, Mizutani U, Kato H, Kato M, Nishino Y, Imada S, Suga S, Matsushita T, Saitoh Y. Magnetic circular dichroism at transition metal L2,3 edges in D03-type (Fe(1-x)Mn(x))3Al alloys. J Synchrotron Radiat 2001; 8:455-456. [PMID: 11512812 DOI: 10.1107/s0909049500016873] [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] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 11/09/2000] [Indexed: 05/23/2023]
Abstract
We have measured magnetic circular dichroism (MCD) spectra at the transition-metal L2,3 edges in D03-type (Fe(1-x)Mn(x))3Al in order to investigate their local magnetic moments. The analysis of the spectra shows that Fe has moments much larger than Mn, whose moment is ferromagnetically coupled with the Fe one. This does not lend support to the antiferromagnetic mechanism proposed for the reduction in magnetization as well as a large Mn moment predicted for x = 1/3. The evolution of satellites found in the Mn spectrum with x increased suggests that the change in the electronic state may result in the magnetization reduction.
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Affiliation(s)
- K Soda
- Graduate School of Engineering, Nagoya University, Japan.
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Takano H, Abe T, Sakurai R, Moriyama Y, Miyazawa Y, Nozaki H, Kawano S, Sasaki N, Kuroiwa T. The complete DNA sequence of the mitochondrial genome of Physarum polycephalum. Mol Gen Genet 2001; 264:539-45. [PMID: 11212908 DOI: 10.1007/s004380000357] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The complete sequence of the mitochondrial DNA (mtDNA) of the true slime mold Physarun polycephalum has been determined. The mtDNA is a circular 62,862-bp molecule with an A+T content of 74.1%. A search with the program BLAST X identified the protein-coding regions. The mitochondrial genome of P. polycephalum was predicted to contain genes coding for 12 known proteins [for three cytochrome c oxidase subunits, apocytochrome b, two F1Fo-ATPase subunits, five NADH dehydrogenase (nad) subunits, and one ribosomal protein], two rRNA genes, and five tRNA genes. However, the predicted ORFs are not all in the same frame, because mitochondrial RNA in P. polycephalum undergoes RNA editing to produce functional RNAs. The nucleotide sequence of an nad7 cDNA showed that 51 nucleotides were inserted at 46 sites in the mRNA. No guide RNA-like sequences were observed in the mtDNA of P. polycephalum. Comparison with reported Physarum mtDNA sequences suggested that sites of RNA editing vary among strains. In the Physarum mtDNA, 20 ORFs of over 300 nucleotides were found and ORFs 14 19 are transcribed.
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Affiliation(s)
- H Takano
- Department of Biological Science, Faculty of Science, Kumamoto University, Japan.
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Nozaki H, Misawa K, Kajita T, Kato M, Nohara S, Watanabe MM. Origin and evolution of the colonial volvocales (Chlorophyceae) as inferred from multiple, chloroplast gene sequences. Mol Phylogenet Evol 2000; 17:256-68. [PMID: 11083939 DOI: 10.1006/mpev.2000.0831] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.5] [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: 11/22/2022]
Abstract
A combined data set of DNA sequences (6021 bp) from five protein-coding genes of the chloroplast genome (rbcL, atpB, psaA, psaB, and psbC genes) were analyzed for 42 strains representing 30 species of the colonial Volvocales (Volvox and its relatives) and 5 related species of green algae to deduce robust phylogenetic relationships within the colonial green flagellates. The 4-celled family Tetrabaenaceae was robustly resolved as the most basal group within the colonial Volvocales. The sequence data also suggested that all five volvocacean genera with 32 or more cells in a vegetative colony (all four of the anisogamous/oogamous genera, Eudorina, Platydorina, Pleodorina, and Volvox, plus the isogamous genus Yamagishiella) constituted a large monophyletic group, in which 2 Pleodorina species were positioned distally to 3 species of Volvox. Therefore, most of the evolution of the colonial Volvocales appears to constitute a gradual progression in colonial complexity and in types of sexual reproduction, as in the traditional volvocine lineage hypothesis, although reverse evolution must be considered for the origin of certain species of Pleodorina. Data presented here also provide robust support for a monophyletic family Goniaceae consisting of two genera: Gonium and Astrephomene.
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Affiliation(s)
- H Nozaki
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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Abstract
The expression of alpha-amylase in aleurone layers of barley is known to be induced by gibberellin A3 (GA). In the present study, gibbestatin B (GNB) was isolated from Streptomyces sp. C-39 as an inhibitor of the GA-induced expression of alpha-amylase in barley and rice, with IC50 values of 125 and 70 microM, respectively. GNB suppressed accumulation of GA-induced barley high-pI type B and rice RAmylA alpha-amylase transcripts. However, GNB showed no inhibitory activity on GUS expression in transgenic tobacco harboring the auxin-inducible par B promoter:: GUS fusion gene. The transcription of an abscisic acid (ABA)-inducible gene, HVA1, was unaffected by GNB. In addition, GNB prevented aleurone cells from cell death induced by GA. In tobacco and Arabidopsis plants, GNB suppressed the germination and retarded the growth of seedlings without toxicity. The growth of gai, spy and abi mutants was also retarded by GNB. Normal plants treated with GA-biosynthesis inhibitors and GA-defective and GA-signaling mutants normally have dwarf dark green leaves. However, dwarfed healthy green leaves were observed in normal plants treated with GNB. GA-induced stem elongation of plants was also detected in the presence of GNB. These analyses indicate that GNB inhibits the GA-induced expression of alpha-amylase by regulating one of the steps involved in ABA signaling, but not by acting as a weak ABA analog.
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Affiliation(s)
- K Hayashi
- Department of Biochemistry, Okayama University of Science, Japan.
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Chikamatsu N, Yokoyama S, Nozaki H, Long E, Fukuda S. A Japanese logographic character frequency list for cognitive science research. Behav Res Methods Instrum Comput 2000; 32:482-500. [PMID: 11029823 DOI: 10.3758/bf03200819] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
This paper describes a Japanese logographic character (kanji) frequency list, which is based on an analysis of the largest recently available corpus of Japanese words and characters. This corpus comprised a full year of morning and evening editions of a major newspaper, containing more than 23 million kanji characters and more than 4,000 different kanji characters. This paper lists the 3,000 most frequent kanji characters, as well as an analysis of kanji usage and correlations between the present list and previous Japanese frequency lists. The authors believe that the present list will help researchers more accurately and efficiently control the selection of kanji characters in cognitive science research and interpret related psycholinguistic data.
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Affiliation(s)
- N Chikamatsu
- Department of Modern Languages, DePaul University, Chicago, IL 60614, USA.
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Nozaki H, Itoh S. Energy correction for isolated impurities under periodic boundary conditions. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 2000; 62:1390-1396. [PMID: 11088599 DOI: 10.1103/physreve.62.1390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/1999] [Indexed: 05/23/2023]
Abstract
The Coulomb energy of aperiodic systems was investigated. To treat completely isolated disorder in infinite systems, energy correction for a supercell method is presented. We discuss a definition of the correction term, and then consider a direct approach taking into account interactions between charge distribution and an indirect approach based on a multipole expansion. In test calculations for isotropic-charged, anisotropic-charged, and neutral impurities, impurity energies independent of supercell sizes were obtained. The present energy correction can be applied to arbitrary systems and is expected to realize more practical simulations for aperiodic systems.
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Affiliation(s)
- H Nozaki
- Advanced Materials and Devices Laboratory, Corporate Research and Development Center, Toshiba Corporation, 1, Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, Japan
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42
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Nara T, Hamano S, Nozaki H, Tanaka Y, Shimizu M, Noda Y, Atsukawa K, Arita J, Horita H, Maekawa K. [Epileptogenesis of acute encephalitis and acute encephalopathy: epilepsy with its onset in the acute phase and without a latent period]. No To Hattatsu 2000; 32:261-7. [PMID: 10824579] [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: 02/16/2023]
Abstract
Epileptogenesis was evaluated in 60 patients with acute encephalitis and in 10 patients with acute encephalopathy. Forty-seven patients have been seizure-free during for more than three years' follow-up (Group III). On the other hand, 23 patients developed epilepsy. Among them, 18 patients developed epilepsy after a latent period of 1 month to 2 3/12 years (Group I). In Group I, a younger age of the onset, a long period of disturbed consciousness and a high activity of CSF neuron-specific enolase (NSE) was associated with refractory epilepsy. The other five patients had continuous seizures from the acute phase of encephalitis without a latent period (Group II). They had more than 2 types of partial motor seizures which occurred frequently during the acute phase of encephalitis. The NSE activity in the CSF of patients in Group II was less than 50 ng/ml, being similar to those in Group III. The epilepsy in Group II, however, was the most refractory. The reason for the development of this continuous refractory epilepsy remained obscure.
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Affiliation(s)
- T Nara
- Division of Neurology, Saitama Children's Medical Center
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43
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Inafuku T, Nozaki H. [Liver function of the most elderly patients]. Rinsho Byori 2000; 48:227-32. [PMID: 10804830] [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: 02/16/2023]
Abstract
To determine the decision level of liver function in the most elderly patients, we compared serum albumin, aspartate aminotransferase(AST), alanine aminotransferase(ALT) and alkaline phosphatase(ALP) values of the most elderly patients > 85 years with those of healthy young adults. Two hundred fifty five elderly people, aged 88-106 years and average 96.6 years(171 women, 84 men), were included in this study. Elderly people were divided into four groups according to their activities of daily living(ADL), 114 Rank-J: free living, 62 Rank-A: unable to go outside without help, 39 Rank-B: bedridden but able to sit up in bed and 40 Rank-C: completely bedridden. Serum albumin values for the most elderly patients in Rank-J were 4.2 +/- 0.3 g/dl for women and 4.0 +/- 0.3 g/dl for men, showing marked decrease from those of young healthy adults aged 19-59 years(p < 0.0001). In 22.2% of elderly women and 44.2% of elderly men, albumin values deviated from the reference interval of young adults. ALT value for the most elderly patients also showed a decrease in both sexes and AST and ALP values for the most elderly patients showed an increase in women compared with young adults. However, these were minor deviations from the reference interval for young adults. In ADL-stratified groups of the most elderly patients, serum albumin values showed marked decrease with decline in ADL, whereas AST, ALT and ALP values remained constant in both sexes regardless of ADL.
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Affiliation(s)
- T Inafuku
- Department of Community Medical Service, University of the Ryukyus Hospital, Okinawa
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Hayashi H, Nishimoto Y, Akiyama K, Nozaki H. New paralytic alkaloids, asperparalines A, B and C, from Aspergillus japonicus JV-23. Biosci Biotechnol Biochem 2000; 64:111-5. [PMID: 10705455 DOI: 10.1271/bbb.64.111] [Citation(s) in RCA: 27] [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: 11/08/2022]
Abstract
New paralytic alkaloids, asperparalines A (1), B (2) and C (3), were isolated from okara (the insoluble residue of whole soybean) that had been fermented with Aspergillus japonicus JV-23. Their structures were elucidated by spectroscopic methods and X-ray crystallography. These asperparalines showed paralytic activity against silk worms.
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Affiliation(s)
- H Hayashi
- Department of Applied Biological Chemistry, College of Agriculture, Osaka Prefecture University, Japan.
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Abstract
In recent years, ultrasonic waves have been an interesting subject for studies due to their wide range of applications in medical diagnoses. In this study, the acoustic properties of the structure of human teeth was determined with the ultrasonic imaging technique. This study may offer some fundamental findings related to the clinical application of the ultrasonic imaging technique in the further development of a virtual system for dental education and research. Twenty freshly-extracted permanent human teeth (10 molars and 10 premolars) were used to investigate their acoustic velocity and impedance by the ultrasonic image analyzing system with a high-resolution focusing probe. Additionally, the relationship between the acoustic properties and the hardness of the teeth was evaluated. It was found that the acoustic properties of the human teeth were influenced by factors related to their structure, such as degree of calcification, distribution of dentinal tubules, and volume of the dentin matrix. The acoustic velocity and impedance showed an apparent correspondence to the hardness of tooth. This analyzing system provides visual information related to tooth structure that can easily quantitatively evaluate their acoustic properties. It is expected that this system will have a wide range of applications and be further developed for clinical uses.
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Affiliation(s)
- S Mezawa
- Department of Endodontics, Nihon University School of Dentistry, Tokyo, Japan
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46
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Tanaka K, Fukuuchi Y, Nogawa S, Nozaki H, Nagata E, Suzuki S, Dembo T, Kosakai A. [Alteration of cAMP-mediated signal transduction in cerebral ischemia--binding activity of PKA and phosphorylation of CREB]. Rinsho Shinkeigaku 1999; 39:1298-9. [PMID: 10791102] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Binding of cAMP to the regulatory subunit of cAMP-dependent protein kinase (PKA) is an essential step for cAMP-mediated signal transduction including phosphorylation of cAMP response element binding protein (CREB). In the present study, binding activity of PKA with cAMP and CREB phosphorylation were examined in rat focal brain ischemia induced by occlusion of the middle cerebral artery for 1.5 hours followed by various time of recirculation. Binding activity of PKA with cAMP was progressively inhibited during the acute phase of ischemia from the ischemic core to peri-ischemia area. Phosphorylated CREB-positive cells in the ischemic core revealed a significant, but transient increase in number at 3.5 hours of recirculation, followed by a rapid decrease below the control level during the subsequent period. On the other hand, in the peri-ischemia area, the number of phosphorylated CREB-positive cells showed a more marked increase as compared to that in the ischemic core, and the increase continued until 48 hours of recirculation with a tendency for gradual decline. Persistent enhancement of CREB phosphorylation may thus be closely related to the neuronal viability and neuroprotective mechanisms, whereas rapid disappearance of CREB phosphorylation following ischemic insult may clearly precede neuronal death.
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Affiliation(s)
- K Tanaka
- Department of Neurology, School of Medicine, Keio University, Tokyo, Japan
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Hayashi K, Nozaki H. Isolation and characterization of gibbestatin B, an inhibitor of gibberellin-induced expression of alpha-amylase, and gibbestatin C from streptomycetaes. J Antibiot (Tokyo) 1999; 52:917-20. [PMID: 10604763 DOI: 10.7164/antibiotics.52.917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- K Hayashi
- Department of Biochemistry, Faculty of Science, Okayama University of Science, Japan
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Imai N, Nozaki H, Miyata K, Terayama Y, Ishihara N. [Short interval change of 99mTc-ethyl cysteinate dimer single photon emission computed tomography in Wilson's disease]. No To Shinkei 1999; 51:785-9. [PMID: 10511956] [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: 02/14/2023]
Abstract
We studied short interval change of cranial computed tomography (CT), magnetic resonance imaging (MRI) and 99mTc-ethyl cysteinate dimer single photon emission computed tomography (99mTc-ECD SPECT) in a case of Wilson's disease. Before treatment, CT scan showed low density changes in the bilateral thalamus and basal ganglia, and MRI demonstrated high intensity in same lesions. 99mTc-ECD SPECT study revealed a hypoperfusion in bilateral thalamus. After 2 months under D-penicillamine therapy, neurological findings had improvement. Hypoperfusion in the thalamus with 99mTc-ECD SPECT significantly improved, whereas abnormal findings of CT scan and MRI persisted. 99mTc-ECD SPECT study may be useful for the planning of the treatment of Wilson's disease.
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Affiliation(s)
- N Imai
- Department of Neurology, Shimizu Municipal Hospital, Shizuoka, Japan
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Fujitake S, Maeda Y, Shimizu M, Nozaki H, Tohyama M, Kataoka S. [A case of breast cancer with liver metastases responding remarkably to combination therapy of mitoxantrone (MIT), doxifluridine (5'-DFUR) and medroxyprogesterone acetate (MPA)]. Gan To Kagaku Ryoho 1999; 26:1177-80. [PMID: 10431585] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
A 60-year-old woman with her right breast cancer showing simultaneous and multiple liver metastases was initially treated with CEFT [cyclophosphamide (CPA), epirubicin (epi-ADM), 5-fluorouracil (5-FU), tamoxifen (TAM)]. After one treatment course the primary lesion did not decrease while tumor markers and liver lesion size increased. Therefore, the foul-smelling primary lesion was resected followed by treatment with mitoxantrone (MIT), 10 mg intravenously every 4 weeks as well as daily/oral administrations of doxifluridine (5'-DFUR) and medroxyprogester-one acetate (MPA). Following MIT administration, the tumor markers decreased markedly, so treatment was continued. After the third course, therapy was continued on an outpatient basis. During treatment WBC reduction to about 3,000/microliter was the only adverse reaction. After 10 courses, the tumor markers were normal, and after 15 courses there were no liver metastases on abdominal CT. Generally, patients with resistance to standard anthracycline chemotherapy are difficult to treat. Those with liver metastasis especially have a poor response which results in a poor prognosis. However, therapy with MIT, 5'-DFUR and MPA may be useful in previously treated, advanced and recurrent breast cancer. Furthermore, this therapy can be done on an outpatient basis, which presumably improves the quality of life (QOL).
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Affiliation(s)
- K Hayashi
- Department of Biochemistry, Faculty of Science, Okayama University of Science, Japan
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