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Miura S, Watanabe E, Senzaki K, Hiruki S, Matsumoto S, Morikawa T, Uchiyama Y, Kurata S, Ochi M, Ohyagi Y, Shibata H. Episodic ataxia type 2 with a novel missense variant (Leu602Arg) in CACNA1A. Hum Genome Var 2024; 11:3. [PMID: 38221525 PMCID: PMC10788331 DOI: 10.1038/s41439-023-00261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/30/2023] [Accepted: 12/04/2023] [Indexed: 01/16/2024] Open
Abstract
Autosomal dominant episodic ataxia type 2 (EA2) is caused by variants in CACNA1A. We examined a 20-year-old male with EA symptoms from a Japanese family with hereditary EA. Cerebellar atrophy was not evident, but single photon emission computed tomography showed cerebellar hypoperfusion. We identified a novel nonsynonymous variant in CACNA1A, NM_001127222.2:c.1805T>G (p.Leu602Arg), which is predicted to be functionally deleterious; therefore, this variant is likely responsible for EA2 in this pedigree.
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Affiliation(s)
- Shiroh Miura
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan.
| | - Emina Watanabe
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Kensuke Senzaki
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan
| | - Shigeyoshi Hiruki
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Sayaka Matsumoto
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan
| | - Takuya Morikawa
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, Japan
| | - Yusuke Uchiyama
- Department of Radiology, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, Japan
| | - Seiji Kurata
- Department of Radiology, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka, Japan
| | - Masayuki Ochi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan
| | - Yasumasa Ohyagi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, Japan
| | - Hiroki Shibata
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, Japan
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Miura S, Hiruki S, Okada T, Takei SI, Senzaki K, Okada Y, Ochi M, Tanabe Y, Ochi H, Igase M, Ohyagi Y, Shibata H. Case report: Frontotemporal dementia and amyotrophic lateral sclerosis caused by a missense variant (p.Arg89Trp) in the valosin-containing protein gene. Front Genet 2023; 14:1155998. [PMID: 37303947 PMCID: PMC10250589 DOI: 10.3389/fgene.2023.1155998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/12/2023] [Indexed: 06/13/2023] Open
Abstract
Frontotemporal dementia and/or amyotrophic lateral sclerosis 6, also known as amyotrophic lateral sclerosis 14, is an autosomal dominant, progressive neurodegenerative disorder caused by various mutations in the valosin-containing protein gene. In this report, we examined a 51-year-old female Japanese patient with frontotemporal dementia and amyotrophic lateral sclerosis. The patient began noticing gait disturbances at the age of 45 years. Neurological examination at the age of 46 years met the Awaji criteria for clinically probable amyotrophic lateral sclerosis. At the age of 49 years, she tended to have poor mood and an aversion to activity. Her symptoms gradually worsened. She required a wheelchair for transport and had difficulty communicating with others because of poor comprehension. She then began to frequently exhibit irritability. Eventually, she was admitted to the psychiatric hospital because uncontrollable violent behavior throughout the day. Longitudinal brain magnetic resonance imaging revealed progressive brain atrophy with temporal dominance, non-progressive cerebellar atrophy, and some non-specific white matter intensities. Brain single photon emission computed tomography showed hypoperfusion in the bilateral temporal lobes and cerebellar hemispheres. Clinical exome sequencing revealed the presence of a heterozygous nonsynonymous variant (NM_007126.5, c.265C>T; p.Arg89Trp) in the valosin-containing protein gene, which was absent in the 1000 Genomes Project, the Exome Aggregation Consortium Database, and the Genome Aggregation Database, and was predicted to be "damaging" by PolyPhen-2 and "deleterious" using SIFT with a Combined Annotation Dependent Depletion score of 35. We also confirmed the absence of this variant in 505 Japanese control subjects. Therefore, we concluded that the variant in the valosin-containing protein gene was responsible for the symptoms of this patient.
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Affiliation(s)
- Shiroh Miura
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Shigeyoshi Hiruki
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka, Japan
| | - Tomohisa Okada
- Department of Radiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Satoko Itani Takei
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Kensuke Senzaki
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Yoko Okada
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Masayuki Ochi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Yuki Tanabe
- Department of Radiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Hirofumi Ochi
- Department of Intractable Disease and Aging Science, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Michiya Igase
- Department of Anti-aging Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Yasumasa Ohyagi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Hiroki Shibata
- Division of Genomics, Medical Institute of Bioregulation, Kyushu University, Higashi-ku, Fukuoka, Japan
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Matsumoto S, Ochi M, Akechi Y, Takei S, Senzaki K, Okada Y, Miura S, Ochi H, Igase M, Ohyagi Y. Dermal advanced glycation end-product accumulation is associated with sarcopenia-related measures in middle-aged and older men. Arch Gerontol Geriatr 2022; 101:104704. [DOI: 10.1016/j.archger.2022.104704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 03/24/2022] [Accepted: 04/12/2022] [Indexed: 11/02/2022]
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Maruta M, Takeuchi K, Senzaki K, Miura S, Kato JI, Nabe S, Ikeda Y, Ochi T, Haro T, Tanimoto K, Yamanouchi J, Yakushijin Y, Takenaka K. P50-4 Neurogenic shock caused by CNS relapse of DLBCL. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.775] [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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Senzaki K, Ochi H, Ochi M, Okada Y, Miura S, Ohyagi Y. Disease reactivation in a patient with secondary progressive multiple sclerosis after switching treatment from fingolimod to siponimod. eNeurologicalSci 2021; 23:100346. [PMID: 34041374 PMCID: PMC8142249 DOI: 10.1016/j.ensci.2021.100346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/15/2021] [Accepted: 05/14/2021] [Indexed: 11/30/2022] Open
Affiliation(s)
- Kensuke Senzaki
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Japan
| | - Hirofumi Ochi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Japan
| | - Masayuki Ochi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Japan
| | - Yoko Okada
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Japan
| | - Shiroh Miura
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Japan
| | - Yasumasa Ohyagi
- Department of Neurology and Geriatric Medicine, Ehime University Graduate School of Medicine, Toon, Japan
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Igase M, Okada Y, Igase K, Matsumoto S, Senzaki K, Ochi M, Ohyagi Y, Yamagishi SI. Casein Hydrolysate Containing Milk-Derived Peptides Reduces Facial Pigmentation Partly by Decreasing Advanced Glycation End Products in the Skin: A Randomized Double-Blind Placebo-Controlled Trial. Rejuvenation Res 2020; 24:97-103. [PMID: 32829654 DOI: 10.1089/rej.2020.2343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Casein hydrolysate has been shown to improve arterial stiffness as estimated by brachial-ankle pulse wave velocity (baPWV) in untreated hypertensive patients. Facial pigmentation is associated with atherosclerosis, both of which are supposed to be modulated by tissue accumulation of advanced glycation end products (AGEs). However, effects of casein hydrolysate on facial pigmentation and AGEs remain largely unknown. This randomized double-blind placebo-controlled trial evaluated whether and how casein hydrolysate improves facial pigmentation in 80 nonhypertensive Japanese patients. Study participants were randomly assigned to receive either active tablets containing casein hydrolysate or placebo for 48 weeks. Facial pigmentation area, baPWV, and skin accumulation levels of AGEs were evaluated by Robo Skin Analyzer RSA50S II, volume-plethysmographic apparatus, and AGE Reader, respectively, at baseline and at the end of the intervention. Treatment with casein hydrolysate, but not placebo significantly reduced triglycerides and facial pigmentation area. There were significant differences of changes in triglycerides, facial pigmentation area, skin accumulation levels of AGEs, and baPWV between the two groups. Furthermore, changes in triglycerides and skin accumulation levels of AGEs were positively and independently associated with those in facial pigmentation area, whereas changes in baPWV were not. This study suggests that casein hydrolysate reduces facial pigmentation area in nonhypertensive participants partly by decreasing skin accumulation levels of AGEs. Clinical-Trials.gov ID: UMIN000027675.
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Affiliation(s)
- Michiya Igase
- Department of Antiaging Medicine, Ehime University Graduate School of Medicine, Ehime, Japan.,Department of Geriatric Medicine and Neurology, and Ehime University Graduate School of Medicine, Ehime, Japan
| | - Yoko Okada
- Department of Antiaging Medicine, Ehime University Graduate School of Medicine, Ehime, Japan.,Department of Geriatric Medicine and Neurology, and Ehime University Graduate School of Medicine, Ehime, Japan
| | - Keiji Igase
- Department of Advanced Brain Therapy, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Sayaka Matsumoto
- Department of Geriatric Medicine and Neurology, and Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kensuke Senzaki
- Department of Geriatric Medicine and Neurology, and Ehime University Graduate School of Medicine, Ehime, Japan
| | - Masayuki Ochi
- Department of Geriatric Medicine and Neurology, and Ehime University Graduate School of Medicine, Ehime, Japan
| | - Yasumasa Ohyagi
- Department of Geriatric Medicine and Neurology, and Ehime University Graduate School of Medicine, Ehime, Japan
| | - Sho-Ichi Yamagishi
- Division of Diabetes, Metabolism, and Endocrinology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan
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Kawamoto R, Ninomiya D, Kasai Y, Senzaki K, Kusunoki T, Ohtsuka N, Kumagi T. Baseline and changes in serum uric acid independently predict 11-year incidence of metabolic syndrome among community-dwelling women. J Endocrinol Invest 2018; 41:959-968. [PMID: 29460261 DOI: 10.1007/s40618-017-0822-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 12/27/2017] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Metabolic syndrome (MetS) is associated with an increased risk of major cardiovascular events. In women, increased serum uric acid (SUA) levels are associated with MetS and its components. However, whether baseline and changes in SUA predict incidence of MetS and its components remains unclear. METHODS The subjects comprised 407 women aged 71 ± 8 years from a rural village. We have identified participants who underwent a similar examination 11 years ago, and examined the relationship between baseline and changes in SUA, and MetS based on the modified criteria of the National Cholesterol Education Program's Adult Treatment Panel (NCEP-ATP) III report. RESULTS Of these subjects, 83 (20.4%) women at baseline and 190 (46.7%) women at follow-up had MetS. Multiple linear regression analysis was performed to evaluate the contribution of each confounding factor for MetS; both baseline and changes in SUA as well as history of cardiovascular disease, low-density lipoprotein cholesterol, and estimated glomerular filtration ratio (eGFR) were independently and significantly associated with the number of MetS components during an 11-year follow-up. The adjusted odds ratios (ORs) (95% confidence interval) for incident MetS across tertiles of baseline SUA and changes in SUA were 1.00, 1.47 (0.82-2.65), and 3.11 (1.66-5.83), and 1.00, 1.88 (1.03-3.40), and 2.49 (1.38-4.47), respectively. In addition, the combined effect between increased baseline and changes in SUA was also a significant and independent determinant for the accumulation of MetS components (F = 20.29, p < 0.001). The ORs for incident MetS were significant only in subjects with age ≥ 55 years, decline in eGFR, and no baseline MetS. CONCLUSIONS These results suggested that combined assessment of baseline and changes in SUA levels provides increased information for incident MetS, independent of other confounding factors in community-dwelling women.
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Affiliation(s)
- R Kawamoto
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan.
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan.
| | - D Ninomiya
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - Y Kasai
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - K Senzaki
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - T Kusunoki
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - N Ohtsuka
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime, 797-1212, Japan
| | - T Kumagi
- Department of Community Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon-city, Ehime, 791-0295, Japan
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Kawamoto R, Ninomiya D, Kasai Y, Senzaki K, Kusunoki T, Ohtsuka N, Kumagi T. Interaction between gender and uric acid on hemoglobin A1c in community-dwelling persons. J Endocrinol Invest 2018; 41:421-429. [PMID: 28948573 DOI: 10.1007/s40618-017-0760-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 11/18/2016] [Accepted: 08/28/2017] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Higher glycated hemoglobin (Hb) (HbA1c) is significantly associated with an increased risk of cardiovascular disease (CVD). Serum uric acid (SUA) levels are associated with glucose intolerance and type 2 diabetes. Whether gender-specific differences regarding the relationship between SUA levels and HbA1c exist is unknown. AIM We recruited 1636 (men, 696 aged of 70 ± 10 years; women, 940 aged of 70 ± 9 years) participants and enrolled in the study during their annual health examination from a single community. We investigated the association between SUA levels and HbA1c within each gender. RESULTS Multiple linear regression analysis showed that in men, SUA (β = -0.091, p = 0.014) with prevalence of antidiabetic medication (β = 0.428, p < 0.001) and eGFR (β = 0.112, p = 0.016) were significantly and negatively associated with HbA1c, and in women, SUA (β = 0.101, p = 0.002) with prevalence of antidiabetic medication (β = 0.458, p < 0.001) were significantly and positively associated with HbA1c. Moreover, the interaction between gender and SUA (β = 0.445, p < 0.001) as well as gender (β = -0.465, p < 0.001), prevalence of antidiabetic medication (β = 0.444, p < 0.001), eGFRCKDEPI (β = 0.074, p = 0.014), and SUA (β = -0.356, p < 0.001) was a significant and independent determinant of HbA1c. A significant interactive effect of gender and SUA on determinants of HbA1c was noted in patients not on antidiabetic medications, regardless of age, HbA1c, and renal function. CONCLUSIONS The interaction between gender and SUA was associated with HbA1c independent of other metabolic factors in community-dwelling persons.
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Affiliation(s)
- R Kawamoto
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan.
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan.
| | - D Ninomiya
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - Y Kasai
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - K Senzaki
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan
| | - T Kusunoki
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - N Ohtsuka
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo, Ehime, 797-1212, Japan
| | - T Kumagi
- Department of Community Medicine, Ehime University Graduate School of Medicine, Tōon, Ehime, 791-0295, Japan
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Kawamoto R, Ninomiya D, Senzaki K, Kumagi T. Interaction between body mass index and serum uric acid in relation to blood pressure in community-dwelling Japanese men. Clin Hypertens 2018; 24:1. [PMID: 29423268 PMCID: PMC5791340 DOI: 10.1186/s40885-018-0087-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/23/2018] [Indexed: 02/07/2023] Open
Abstract
Background Few data is available on the association between body mass index (BMI), serum uric acid (SUA) levels and blood pressure (BP) categories in the disease continuum, when efforts for its prevention may be applicable. Methods We performed a cross-sectional study to examine the association between BMI, SUA and BP in a community-dwelling sample of Japanese men. Individuals not on antihypertensive and uric acid lowering medications, and aged 50 to 90 years [817men aged 66 ± 9 (mean ± standard deviation) years] were recruited for the survey during a community based annual medical check-up. The main outcome was the presence of prehypertension [systolic BP (SBP) 120-139 mmHg and/or diastolic BP (DBP) 80-89 mmHg] and hypertension [SBP ≥ 140 and /or DBP ≥ 90]. Results In participants with a BMI of < 21.0 kg/m2, increased SUA levels were positively associated with SBP and DBP, but in those with a BMI of ≥ 21.0 kg/m2, increased SUA levels were negatively associated with SBP and DBP. The interaction between BMI and SUA as well as BMI and SUA was a significant and independent determinant for both SBP (β = − 1.125, p = 0.001) and DBP (β = − 0.995, p = 0.005). Among participants, the respective prevalence of normotension, prehypertension, and hypertension was 19.5% and 53.7%, and 19.8%. The prevalence of normotension and prehypertension decreased with increasing BMI and the prevalence of hypertension increased with increasing BMI. In participants with a BMI ≥ 21.0 kg/m2, the adjusted-odds ratio of SUA for hypertension was 0.75 (95% CI, 0.59-0.95) compared with normotension and 0.82 (0.70-0.96) compared with prehypertension. In those with a BMI of < 21.0 kg/m2, these associations were not shown. Conclusion BMI may modify the association between SUA and blood pressure status among community-dwelling men.
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Affiliation(s)
- Ryuichi Kawamoto
- 1Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime 791-0295 Japan.,Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, Ehime 797-1212 Japan
| | - Daisuke Ninomiya
- 1Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime 791-0295 Japan
| | - Kensuke Senzaki
- 1Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime 791-0295 Japan
| | - Teru Kumagi
- 1Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime 791-0295 Japan
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Kawamoto R, Ninomiya D, Senzaki K, Kumagi T. Alanine Aminotransferase and Total Bilirubin Are Synergistically Associated with Metabolic Syndrome Among Middle-Aged and Elderly Japanese Women. Metab Syndr Relat Disord 2017; 15:407-415. [PMID: 28922061 DOI: 10.1089/met.2017.0064] [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] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Metabolic syndrome (MetS) is associated with an increased risk of major cardiovascular events. Alanine aminotransferase (ALT) at high levels and total bilirubin (T-BiL) at low levels were oxidative potentials, but it was uncertain whether ALT and T-BiL had an additive interaction for the risk of MetS. METHODS From a single community, we recruited 864 women (70 ± 8 years) during their annual health examination. We cross-sectionally investigated whether ALT and T-BiL are associated with MetS and its components based on the modified criteria of the National Cholesterol Education Program's Adult Treatment Panel (NCEP-ATP) III report. RESULTS Of these subjects, 415 women (48.0%) had MetS. Participants with MetS had a higher ALT and lower T-BiL level than those without MetS. The adjusted-odds ratios (OR) (95% confidence interval [CI]) for MetS across tertiles of ALT and T-BiL were 1.00, 1.19 (0.78-1.81), and 1.86 (1.24-2.80) and 1.00, 0.96 (0.65-1.43), and 0.54 (0.36-0.81), respectively. When ALT and T-BiL were categorized into three binary characteristics by tertiles of ALT and T-BiL, high T-BiL was associated with decreased risk for MetS in a multivariable model (OR: 0.55, 95% CI: 0.37-0.82), especially among those with 1st tertile ALT. Similarly, high ALT was also associated with increased risk for MetS in a multivariate model (OR: 1.81, 95% CI: 1.20-2.71), especially among those with 2nd & 3rd tertiles of T-BiL. In the formal testing of addictive interaction between ALT and T-BiL for MetS, presence of T-BiL <0.72 mg/dL (1st and 2nd tertile) alone was not associated with increased risk of MetS in a multivariate analysis, and presence of ALT ≥16 IU/L (2nd and 3rd tertile) alone was not associated with increased risk of MetS. CONCLUSIONS These results suggested that higher ALT and lower T-BiL levels were synergistically associated with MetS, independent of other confounding factors among Japanese women.
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Affiliation(s)
- Ryuichi Kawamoto
- 1 Department of Community Medicine, Ehime University Graduate School of Medicine , Ehime, Japan .,2 Department of Internal Medicine, Seiyo Municipal Nomura Hospital , Ehime, Japan
| | - Daisuke Ninomiya
- 1 Department of Community Medicine, Ehime University Graduate School of Medicine , Ehime, Japan
| | - Kensuke Senzaki
- 1 Department of Community Medicine, Ehime University Graduate School of Medicine , Ehime, Japan
| | - Teru Kumagi
- 1 Department of Community Medicine, Ehime University Graduate School of Medicine , Ehime, Japan
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Kawamoto R, Ninomiya D, Senzaki K, Kasai Y, Kusunoki T, Ohtsuka N, Kumagi T. Interactive association of serum uric acid and total bilirubin with renal dysfunction among community-dwelling subjects. Int Urol Nephrol 2017; 49:1439-1446. [PMID: 28573490 DOI: 10.1007/s11255-017-1633-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/26/2017] [Indexed: 10/19/2022]
Abstract
PURPOSE Chronic kidney disease is a major public health concern. Serum uric acid (SUA) at high levels was oxidative stress agents, and total bilirubin (T-BiL) at mildly increased levels was potent antioxidants, but whether SUA and T-BiL produce an additive interaction for the risk of renal dysfunction remains unclear. METHODS The subjects comprised 567 men aged 71 ± 8 (mean ± standard deviation) years and 853 women aged 70 ± 8 years from a rural village. We examined the relationship between SUA and T-BiL, and renal function was evaluated by estimated glomerular filtration rate (eGFR) using the Modification of Diet in Renal Disease Study Group equation. RESULTS Stepwise multiple regression analysis using eGFR as an objective variable, adjusted for risk factors as explanatory variables, showed that SUA (β = -0.358, p < 0.001) as well as age (β = -0.534, p < 0.001), drinking status (β = 0.119, p < 0.001), and the presence of antihypertensive medication (β = -0.058, p = 0.005) were significantly and independently associated with eGFR, but T-BiL was not associated with eGFR. While in the group with the highest tertile of SUA, T-BiL (β = 0.081, p = 0.032) was significantly and independently associated with eGFR, and in the group with the lowest to middle tertile of SUA, T-BiL was not associated with eGFR. In addition, interaction between SUA and T-BiL (F = 8.512, p = 0.004) as well as age, drinking status, the presence of antihypertensive medication, SUA, and T-BiL was a significant and independent determinant for eGFR. CONCLUSIONS Our data demonstrated that low T-BiL could be important as a potential risk factor for renal dysfunction in those with high SUA.
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Affiliation(s)
- Ryuichi Kawamoto
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, 791-0295, Japan. .,Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, 797-1212, Japan.
| | - Daisuke Ninomiya
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, 791-0295, Japan.,Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, 797-1212, Japan
| | - Kensuke Senzaki
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, 791-0295, Japan.,Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, 797-1212, Japan
| | - Yoshihisa Kasai
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, 797-1212, Japan
| | - Tomo Kusunoki
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, 797-1212, Japan
| | - Nobuyuki Ohtsuka
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, 9-53 Nomura, Nomura-cho, Seiyo-city, 797-1212, Japan
| | - Teru Kumagi
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, 791-0295, Japan
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12
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Kawamoto R, Ninomiya D, Senzaki K, Kumagi T. Mildly elevated serum total bilirubin is negatively associated with hemoglobin A1c independently of confounding factors among community-dwelling middle-aged and elderly persons. J Circ Biomark 2017; 6:1849454417726609. [PMID: 28936268 PMCID: PMC5599010 DOI: 10.1177/1849454417726609] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 07/14/2017] [Indexed: 01/10/2023] Open
Abstract
Abnormally high glycated hemoglobin (Hb) (HbA1c) is significantly associated with oxidative stress and an increased risk of cardiovascular disease (CVD). Serum total bilirubin (T-B) may have a beneficial role in preventing oxidative changes and be a negative risk factor of CVD. Limited information is available on whether serum T-B is an independent confounding factor of HbA1c. The study subjects were 633 men aged 70 ± 9 (mean ± standard deviation (SD)) years and 878 women aged 70 ± 8 years who were enrolled consecutively from among patients aged ≥40 years through a community-based annual check-up process. We evaluated the relationship between various confounding factors including serum T-B and HbA1c in each gender. Multiple linear regression analysis pertaining to HbA1c showed that in men, serum T-B (β = -0.139) as well as waist circumference (β = 0.099), exercise habit (β = 0.137), systolic blood pressure (SBP) (β = 0.076), triglycerides (β = 0.087), and uric acid (β = -0.123) were significantly and independently associated with HbA1c, and in women, serum T-B (β = -0.084) as well as body mass index (β = 0.090), smoking status (β = -0.077), SBP (β = 0.117), diastolic blood pressure (DBP) (β = -0.155), low-density lipoprotein cholesterol (β = 0.074), prevalence of antidyslipidemic medication (β = 0.174), and uric acid (β = 0.090) were also significantly and independently associated with HbA1c. Multivariate-adjusted serum HbA1c levels were significantly high in subjects with the lowest serum T-B levels in both genders. Serum T-B is an independent confounding factor for HbA1c among community-dwelling middle-aged and elderly persons.
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Affiliation(s)
- Ryuichi Kawamoto
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, Seiyo-city, Ehime, Japan
| | - Daisuke Ninomiya
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, Seiyo-city, Ehime, Japan
| | - Kensuke Senzaki
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime, Japan
- Department of Internal Medicine, Seiyo Municipal Nomura Hospital, Seiyo-city, Ehime, Japan
| | - Teru Kumagi
- Department of Community Medicine, Ehime University Graduate School of Medicine, Toon-city, Ehime, Japan
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Kajiwara N, Hayashi K, Fukui T, Yamamoto S, Senzaki K, Murakami S, Kitamura T, Ueoka T, Inoue M, Hayashi S, Sakamoto K, Yoshimoto M, Asano S, Maki I. Restructuring the Ikeda City school urinary screening system: report of a screening survey. Asia Pac Fam Med 2013; 12:6. [PMID: 24330222 PMCID: PMC4028752 DOI: 10.1186/1447-056x-12-6] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 12/06/2013] [Indexed: 06/03/2023]
Abstract
BACKGROUND Annual urinary screening is conducted at municipal kindergartens, elementary schools, and junior high schools in Ikeda City, Osaka, Japan (Ikeda City School System), and the results are reviewed by a general physician, but standards for when to recommend specialist referral have not been clear. METHODS In all children attending the Ikeda City School System in 2012, dipstick urinalysis of a first-morning urine specimen was recommended once or twice, and if a second urinalysis showed proteinuria (≥1+), the urinary protein/creatinine ratio was measured. If this showed ≥0.2 g/g of creatinine (g/gCr), it was recommended that the child be evaluated by a specialist at Ikeda City Hospital. RESULTS Urinary screening was performed in about 20% (388) of kindergarten, about 90% (5363) of elementary school, and about 86% (2523) of junior high school children living in Ikeda City. Urine samples were obtained from 387, 5349, and 2476 children, respectively. The urinary protein/creatinine ratio was ≥0.2 g/gCr in 13 children, including 1 elementary and 12 junior high children. In these 13 children, chronic nephritic syndrome (CNS) was suspected in 6 junior high school children, and of these, this was a new finding in 5, and renal biopsy was indicated in 3. In Ikeda City, the prevalence of CNS in elementary school children was <0.03%, the prevalence of CNS in junior high school children was 0.29%, and a renal biopsy was indicated in 0.14%. By eliminating the costs associated with assessment of the results by the Ikeda Medical Association, and by directly contracting with the testing company, the expenses paid by Ikeda City for the system itself decreased from 2,508,619 yen to 966,157 yen. CONCLUSIONS Incorporating the urinary protein/creatinine ratio into the school urinary screening system in the Ikeda City School System and clarifying standards for specialist referral has enabled restructuring of the system so that is efficient and its effectiveness can be assessed.
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Affiliation(s)
| | - Kazuyuki Hayashi
- Department of Nephrology, Ikeda City Hospital, Ikeda, Osaka, Japan
| | - Takayuki Fukui
- Department of Nephrology and Artificial Kidney, Matsushita Memorial Hospital, Moriguchi, Osaka, Japan
| | - Satoko Yamamoto
- Department of Nephrology, Ikeda City Hospital, Ikeda, Osaka, Japan
| | - Kensuke Senzaki
- Department of General Medicine, Ikeda City Hospital, Ikeda, Osaka, Japan
| | | | - Takuya Kitamura
- Department of General Medicine, Ikeda City Hospital, Ikeda, Osaka, Japan
| | - Takato Ueoka
- Department of General Medicine, Ikeda City Hospital, Ikeda, Osaka, Japan
| | - Mikito Inoue
- Inoue Clinic Medical Corporation, Ikeda, Osaka, Japan
| | | | | | | | - Seiko Asano
- Ikeda City Fushiodai Elementary School, Ikeda, Osaka, Japan
| | - Ichiro Maki
- Department of Pediatrics, Ikeda City Hospital, Ikeda, Osaka, Japan
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14
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Nakano H, Tanigawa T, Ohnishi Y, Uemori H, Senzaki K, Furukawa T, Nishima S. Validation of a single-channel airflow monitor for screening of sleep-disordered breathing. Eur Respir J 2008; 32:1060-7. [PMID: 18480104 DOI: 10.1183/09031936.00130907] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A simple screening method for sleep-disordered breathing (SDB) is desirable for primary care practices. In the present study, a simple monitor, which utilises a new type of flow sensor and a novel algorithm, was prospectively validated. Home recording for 2 nights with the monitor only, followed by in-laboratory recording with the monitor together with polysomnography, were carried out in consecutive patients (n = 100) suspected of SDB. A subjective sleep log was also recorded. The signal was analysed using power spectral analysis, which yielded the flow respiratory disturbance index (flow-RDI). There was no recording failure at home. The reproducibility of the flow-RDI between the 2 nights at home was high (intraclass correlation coefficient = 0.92). The sensitivity and specificity of the in-laboratory flow-RDI to diagnose SDB were 0.96 and 0.82, 0.91 and 0.82, and 0.89 and 0.96, for apnoea/hypopnoea index (AHI) > or =5, > or =15 and > or =30 events x h(-1), respectively. The diagnostic ability in low-severity subgroups (female, normal weight, AHI <15 events x h(-1)) was almost comparable to that in the entire group. Excluding subjective waking time on the sleep log from the recording time had no significant effect on the flow-RDI. The single-channel monitor is considered feasible for ambulatory sleep disordered breathing monitoring because of its easy applicability, high reproducibility and relatively high agreement with polysomnography results.
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Affiliation(s)
- H Nakano
- Dept of Pulmonology, Fukuoka National Hospital, Fukuoka, Japan.
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15
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Takei Y, Hamada S, Senzaki K, Mutoh T, Sugino H, Yagi T. Two novel CNRs from the CNR gene cluster have molecular features distinct from those of CNR1 to 8. Genomics 2001; 72:321-30. [PMID: 11401448 DOI: 10.1006/geno.2000.6468] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cadherin-related neuronal receptor (CNR) family proteins are known as synaptic cadherins and Reelin receptors. Here we have identified two novel mouse CNR genes, CNRc1 and CNRc2, orthologues of human protocadherin (Pcdh) alpha-c1 and Pcdhalpha-c2, respectively. While the variable large exons of CNRc1 and c2 contain six conserved extracellular cadherin repeats (EC1-6) and are linked to the constant exons, both contain several molecular features distinct from CNR1-8. CNRc1 and c2 lack the Arg-Gly-Asp (RGD) sequence that is conserved in the EC1 of CNR1-8, which is necessary for binding to Reelin. The present studies confirm that CNRc1 and c2 failed to immunoprecipitate with Reelin. In addition, the regulation of novel CNR expression patterns during brain development is slightly different from that of CNR1. The identification of these new CNR genes characterized by their distinct extracellular function and expression is indicative of the novel diversity of the processes of brain structuring and synapse regulation.
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MESH Headings
- Alternative Splicing
- Amino Acid Sequence
- Animals
- Base Sequence
- Blotting, Northern
- Brain/embryology
- Brain/metabolism
- Cadherins/genetics
- Cadherins/metabolism
- Cell Adhesion Molecules, Neuronal/metabolism
- Cell Line
- Cloning, Molecular
- DNA/chemistry
- DNA/genetics
- Extracellular Matrix Proteins/metabolism
- Gene Expression Regulation, Developmental
- Humans
- Mice
- Mice, Inbred C57BL
- Molecular Sequence Data
- Multigene Family/genetics
- Nerve Tissue Proteins
- Neuropeptides/genetics
- Neuropeptides/metabolism
- Phylogeny
- Precipitin Tests
- Protein Binding
- Protocadherins
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Cell Surface
- Reelin Protein
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Serine Endopeptidases
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Affiliation(s)
- Y Takei
- Laboratory of Neurobiology and Behavioral Genetics, National Institute for Physiological Sciences, Myodaiji, Okazaki, 444-8585, Japan
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16
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Abstract
We investigated the role of nitric oxide (NO) and brain-derived neurotrophic factor (BDNF) in the pentylenetetrazole (PTZ)-induced kindling in rats. Seizures were induced by single administration of PTZ, which was associated with an increase in levels of NO metabolites (NOx) in the hippocampus. Pretreatment with a neuronal NO synthase inhibitor, 7-nitroindazole (7-NI), diminished the PTZ-induced increase in NOx levels without affecting the seizure intensity. Repeated administration of PTZ produced a gradual increase in the seizure intensity, leading to the development of kindling. In the kindled rats, PTZ at a dose of 40 mg/kg increased NOx levels in the hippocampus, whereas it had no effect in control animals. Cotreatment of 7-NI with PTZ blocked the development of kindling and attenuated the PTZ-induced increase in NOx levels. A significant increase in BDNF levels was observed in the hippocampus of the kindled rats, which returned to the control levels following seizures induced by PTZ. 7-NI reduced the hippocampal BDNF levels in control rats and suppressed the increase of BDNF levels in the kindled rats. Our findings suggest that NO plays a role in the development of PTZ-induced kindling and that BDNF may contribute to the NO-dependent plastic changes in neuronal excitability.
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Affiliation(s)
- D Han
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Japan
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17
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Abstract
Layering and positioning of neurons require Reelin- and Src family-associated mammalian Disabled (mDab1). Cadherin-related neuronal receptor (CNR) genes are expressed in neurons of the cortical layer, but not in Cajal-Retzius cells expressing Reelin. This leads us to hypothesize that CNRs bound to Fyn of the Src family are receptors for Reelin. Herein we confirm the association and colocalization of CNR proteins with Reelin. This binding is blocked by CR-50 antibody against Reelin, as well as by monoclonal antibodies produced against CNRs. Both disturb the signaling pathway from Reelin to mDab1 and the positioning of cortical neurons in vitro. These results strongly suggest that the CNR family proteins are multiple Reelin receptors. In addition, differential conservation of the Reelin-binding domain among terrestrial vertebrates may be pertinent to the diversity or complexity of brains.
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Affiliation(s)
- K Senzaki
- Laboratory of Neurobiology and Behavioral Genetics, National Institute for Physiological Sciences, Myodaiji, Okazaki, Japan
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18
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Yamada K, Tanaka T, Han D, Senzaki K, Kameyama T, Nabeshima T. Protective effects of idebenone and alpha-tocopherol on beta-amyloid-(1-42)-induced learning and memory deficits in rats: implication of oxidative stress in beta-amyloid-induced neurotoxicity in vivo. Eur J Neurosci 1999; 11:83-90. [PMID: 9987013 DOI: 10.1046/j.1460-9568.1999.00408.x] [Citation(s) in RCA: 184] [Impact Index Per Article: 7.4] [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: 11/20/2022]
Abstract
Amyloid beta-peptide (A beta), the major constituent of the senile plaques in the brains of patients with Alzheimer's disease, is cytotoxic to neurons and has a central role in the pathogenesis of the disease. Previous studies have suggested that oxidative stress is involved in the mechanisms of A beta-induced neurotoxicity in vitro. In the present study, we examined whether oxidative stress contributes to learning and memory deficits caused by continuous intracerebroventricular infusion of A beta-(1-42). In the A beta-(1-42)-infused rats, spontaneous alternation behaviour in a Y-maze and spatial memory in a water maze task were significantly impaired, as compared with A beta-(40-1)-infused control rats. The retention of passive avoidance learning was also significantly impaired by treatment with A beta-(1-42). Potent antioxidants idebenone and alpha-tocopherol prevented the behavioural deficits in Y-maze and water maze, but not passive avoidance, tasks in A beta-(1-42)-infused rats when they were repeatedly administered by mouth once a day from 3 days before the start of A beta infusion to the end of behavioural experiments. Lipid peroxide levels in the hippocampus and cerebral cortex of A beta-(1-42)-infused rats did not differ from those in control animals, and neither idebenone nor alpha-tocopherol affected the lipid peroxide levels. These results suggest that treatment with antioxidants such as idebenone and alpha-tocopherol prevents learning and memory deficits caused by A beta.
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Affiliation(s)
- K Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University School of Medicine, Japan
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19
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Yamada K, Komori Y, Tanaka T, Senzaki K, Nikai T, Sugihara H, Kameyama T, Nabeshima T. Brain dysfunction associated with an induction of nitric oxide synthase following an intracerebral injection of lipopolysaccharide in rats. Neuroscience 1999; 88:281-94. [PMID: 10051207 DOI: 10.1016/s0306-4522(98)00237-1] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [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: 11/18/2022]
Abstract
We investigated the pathophysiological role of nitric oxide synthesized by inducible nitric oxide synthase in the brain, by injecting lipopolysaccharide directly into the rat cerebral cortex/hippocampus. The levels of nitric oxide metabolites, nitrite and nitrate, began to increase in a dose-dependent manner with a 3-h lag, and reached approximately seven-fold the basal levels 8 h after the direct injection of lipopolysaccharide (5 microg). The lipopolysaccharide-induced increase in nitrite and nitrate levels was inhibited by treatment with the specific inducible nitric oxide synthase inhibitor aminoguanidine. The protein synthesis inhibitor cycloheximide delayed the onset of the increase in nitric oxide metabolite levels, and reduced the peak levels. Lipopolysaccharide increased Ca2+-independent, but not Ca2+-dependent, nitric oxide synthase activity in the brain. Intense nicotinamide adenine dinucleotide phosphate-diaphorase activity was observed in round cells in the vicinity of the site of injection of lipopolysaccharide 8 h after the injection. Neuronal death was observed seven days after the injection of lipopolysaccharide. Spatial memory, as assessed by performance in a water maze task and spontaneous alternation behavior in a Y-maze, was significantly impaired in rats which had had previous bilateral injections of lipopolysaccharide into the hippocampus. The lipopolysaccharide-induced neuronal death and spatial memory impairments were prevented by aminoguanidine. These results suggest that direct injection of lipopolysaccharide into the brain causes an induction of inducible nitric oxide synthase in vivo. Furthermore, it is suggested that nitric oxide produced by inducible nitric oxide synthase is responsible for the lipopolysaccharide-induced brain dysfunction.
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Affiliation(s)
- K Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University School of Medicine, Japan
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20
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Maeshima T, Shutoh F, Hamada S, Senzaki K, Hamaguchi-Hamada K, Ito R, Okado N. Serotonin2A receptor-like immunoreactivity in rat cerebellar Purkinje cells. Neurosci Lett 1998; 252:72-4. [PMID: 9756362 DOI: 10.1016/s0304-3940(98)00546-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [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: 02/08/2023]
Abstract
In the present study we examined the distribution pattern of serotonin2A (5-HT2A) receptors in the rat cerebellum. A strong immunoreaction against 5-HT2A receptor protein was observed in Purkinje cells. A dense cluster of immunopositive dendritic profiles of Purkinje cells was located beneath the pia matter of cerebellar cortex. Somal profiles in the cerebellar nuclei had weak to moderate immunoreactions.
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Affiliation(s)
- T Maeshima
- Department of Physical Therapy, Tsukuba College of Technology, Ibaraki, Japan
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Tanaka T, Yamada K, Senzaki K, Narimatsu H, Nishimura K, Kameyama T, Nabeshima T. NC-1900, an active fragment analog of arginine vasopressin, improves learning and memory deficits induced by beta-amyloid protein in rats. Eur J Pharmacol 1998; 352:135-42. [PMID: 9716347 DOI: 10.1016/s0014-2999(98)00344-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have reported that the continuous infusion of beta-amyloid protein-(1-40) into the rat cerebral ventricle produces learning and memory deficits accompanied by dysfunction in the cholinergic and dopaminergic systems. L-Pyroglutamyl-L-asparaginyl-L-seryl-L-prolyl-L-arginylglycinamide (NC-1900), an active fragment analog of arginine vasopressin in the rat brain, is a stable peptide with a five-fold longer half-life than that of arginine vasopressin-(4-9). In the present study, we examined the effects of NC-1900 on learning and memory deficits in beta-amyloid protein-(1-40)-infused rats. The rats were injected subcutaneously with NC-1900 (0.1 and 1 ng kg(-1)) once a day throughout the period of behavioral examination. In the beta-amyloid protein-infused rats, learning and memory in water maze and passive avoidance tasks were impaired compared with these in the control rats. NC-1900 prevented the learning and memory deficits in beta-amyloid protein-infused rats. Moreover, NC-1900 tended to increase the choline acetyltransferase activity in the frontal cortex of the beta-amyloid protein-infused rats. These results suggested that NC-1900 could be useful for the treatment of patients with Alzheimer's disease.
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Affiliation(s)
- T Tanaka
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University School of Medicine, Japan
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22
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Maeshima T, Ito R, Hamada S, Senzaki K, Hamaguchi-Hamada K, Shutoh F, Okado N. The cellular localization of 5-HT2A receptors in the spinal cord and spinal ganglia of the adult rat. Brain Res 1998; 797:118-24. [PMID: 9630559 DOI: 10.1016/s0006-8993(98)00360-6] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The localization of serotonin2A (5-HT2A) receptors in the adult rat spinal cord and dorsal root ganglia was examined by using a polyclonal antibody that recognizes the C-terminus peptides of the mouse 5-HT2A receptor. Positive cell bodies of 5-HT2A receptor were found in several regions of the spinal cord. Generally, large-to-intermediate sized neuronal cell bodies were intensely immunolabeled. Motoneurons in the ventral horn were the most intensely labeled. Dot-like immunoreactive profiles were located beneath the cell membrane of motoneurons. Neuronal somata in the intermediolateral nucleus of the thoracic spinal cord were moderately labeled. The immunoreactivity in the dorsal horn was weak. A considerable number of glial cell bodies in the white matter were immunostained. The majority of both small and large sized neurons were 5-HT2A immunopositive in the dorsal root ganglion.
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Affiliation(s)
- T Maeshima
- Department of Physical Therapy, Tsukuba College of Technology, Tsukuba, Ibaraki 305, Japan
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23
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Aoki T, Tomiyama Y, Honda S, Senzaki K, Tanaka A, Okubo M, Takahashi F, Takasugi H, Seki J. Difference of (Ca2+)i movements in platelets stimulated by thrombin and TRAP: the involvement of alpha(IIb)beta3-mediated TXA2 synthesis. Thromb Haemost 1998; 79:1184-90. [PMID: 9657446] [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: 02/08/2023]
Abstract
This study investigated the difference of [Ca2+]i movement in platelets in response to thrombin and TRAP. The involvement of alpha(IIb)beta3 in this signaling was also studied. Stimulation of platelets with thrombin at 0.03 U/ml caused platelet aggregation and a two-peak increase in [Ca2+]i. The second peak of [Ca2+]i, but not the first peak was abolished by the inhibition of platelet aggregation with alpha(IIb)beta3 antagonists or by scavenging endogenous ADP with apyrase. A cyclooxygenase inhibitor, aspirin, and a TXA2 receptor antagonist, BM 13505, also abolished the second peak of [Ca2+]i but not the first peak, although these regents did not inhibit aggregation. Under the same assay conditions, measurement of TXB2 demonstrated that alpha(IIb)beta3 antagonists and aspirin almost completely inhibited the production of TXB2. In contrast to thrombin-stimulation, TRAP caused only a single peak of [Ca2+]i even in the presence of platelet aggregation, and a high level of [Ca2+]i increase was needed for the induction of platelet aggregation. The inhibition of aggregation with alpha(IIb)beta3 antagonists had no effect on [Ca2+]i change and TXB2 production induced by TRAP. Inhibition studies using anti-GPIb antibodies suggested that GPIb may be involved in the thrombin response, but not in the TRAP. Our findings suggest that low dose thrombin causes a different [Ca2+]i response and TXA2 producing signal from TRAP. Endogenous ADP release and fibrinogen binding to alpha(IIb)beta3 are responsible for the synthesis of TXA2 which results in the induction of the second peak of [Ca2+]i in low thrombin- but not TRAP-stimulated platelets.
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Affiliation(s)
- T Aoki
- Department of Pharmacology, Medicinal Biology Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Osaka, Japan.
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Kohmura N, Senzaki K, Hamada S, Kai N, Yasuda R, Watanabe M, Ishii H, Yasuda M, Mishina M, Yagi T. Diversity revealed by a novel family of cadherins expressed in neurons at a synaptic complex. Neuron 1998; 20:1137-51. [PMID: 9655502 DOI: 10.1016/s0896-6273(00)80495-x] [Citation(s) in RCA: 366] [Impact Index Per Article: 14.1] [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: 01/06/2023]
Abstract
In mammals, neurons are highly differentiated and play distinctive functions even in the same brain region. We found a novel cadherin-related neuronal receptor (Cnr) gene family by studying Fyn-binding activity in mouse brain. CNR1 protein is located in the synaptic junction and forms a complex with Fyn. Sequence analysis of eight Cnr products of approximately 20 genes indicates that these comprise a novel cadherin family of the cadherin superfamily. The expression patterns of each member of this novel family were grossly similar to each other but restricted to subpopulations of neurons of the same type. The diversity of the Cnr family genes suggests that there are molecular mechanisms that govern highly differentiated neural networks in the mammalian CNS.
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Affiliation(s)
- N Kohmura
- Laboratory of Neurobiology and Behavioral Genetics, National Institute for Physiological Sciences, Myodaiji, Okazaki, Japan
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Yamada K, Tanaka T, Senzaki K, Kameyama T, Nabeshima T. Propentofylline improves learning and memory deficits in rats induced by beta-amyloid protein-(1-40). Eur J Pharmacol 1998; 349:15-22. [PMID: 9669491 DOI: 10.1016/s0014-2999(98)00166-6] [Citation(s) in RCA: 53] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We have reported that continuous infusion of beta-amyloid protein-(1-40) into the cerebral ventricle produces learning and memory deficits in rats. Propentofylline has potent stimulatory effects on nerve growth factor (NGF) synthesis/secretion in mouse astrocytes in vitro and increases cerebral NGF content in aged rats. In the present study, we examined the effects of propentofylline on learning and memory deficits in beta-amyloid protein-infused rats. The rats were given propentofylline orally once a day throughout the period of behavioral examination. In the beta-amyloid protein-infused rats, spontaneous alternation behavior in a Y-maze, and performance in water maze and passive avoidance tasks were significantly impaired compared to sham-operated rats. Propentofylline prevented these behavioral deficits, but did not change the reduction of the activity of choline acetyltransferase in the hippocampus in the beta-amyloid protein-infused rats. These results suggest that propentofylline is useful for the treatment of patients with Alzheimer's disease.
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Affiliation(s)
- K Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University School of Medicine, Japan
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26
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Hamada S, Senzaki K, Hamaguchi-Hamada K, Tabuchi K, Yamamoto H, Yamamoto T, Yoshikawa S, Okano H, Okado N. Localization of 5-HT2A receptor in rat cerebral cortex and olfactory system revealed by immunohistochemistry using two antibodies raised in rabbit and chicken. Brain Res Mol Brain Res 1998; 54:199-211. [PMID: 9555012 DOI: 10.1016/s0169-328x(97)00322-7] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Serotonin 2A receptor (5-HT2A receptor) is widely distributed in the central nervous system, and has been suggested to be involved in a variety of behavioral conditions and neuropsychiatric disorders. Two polyclonal antibodies were raised against the N-terminus peptide of rat 5-HT2A receptor in chickens (5-HT2A-N) and a glutathione S-transferase fusion protein that contained the C-terminus of the mouse 5-HT2A receptor in rabbits (5-HT2A-C). Affinity-purified 5-HT2A-N and -C antibodies reacted strongly with a single band of 77-78 kDa in postsynaptic density proteins prepared from the rat cortex. The distribution pattern of immunoreactive structures in the rat brain was virtually the same for the two antibodies. The highest levels of immunoreactivity were observed in the olfactory bulb, neocortex, claustrum, piriform cortex, mamillary bodies, pontine nuclei, red nucleus and cranial motor nuclei. In the olfactory bulb, mitral cells were intensely labeled. In the neocortex, many immunoreactive neurons were found in layers II-VI. In layer IV of the neocortex, strong neuropil labeling was observed. In a double-labeling study using chicken 5-HT2A-N and rabbit anti-glial fibrillary acidic protein (GFAP) antibody, a considerable number of GFAP positive cells also showed 5-HT2A immunoreactivity. By using an immunoelectron microscopic technique, 5-HT2A receptor immunoreaction was shown to be localized just beneath the postsynaptic membrane thickening of asymmetric synapses.
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Affiliation(s)
- S Hamada
- Department of Anatomy, Institute of Basic Medical Science, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
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Yamada K, Nishiwaki K, Hattori K, Senzaki K, Nagata M, Komatsu T, Shimada Y, Nabeshima T. No changes in cerebrospinal fluid levels of nitrite, nitrate and cyclic GMP with aging. Short communication. J Neural Transm (Vienna) 1998; 104:825-31. [PMID: 9451715 DOI: 10.1007/bf01285551] [Citation(s) in RCA: 13] [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: 02/06/2023]
Abstract
Nitric oxide (NO) is a free radical gas that plays a role in various signal transduction processes. NO has been proposed to have a function in the mechanism of synaptic plasticity, including long-term potentiation and memory formation in vivo. Because a failure in synaptic plasticity is considered to be involved in aging-associated brain dysfunction, NO production in the brain may be altered by aging. In the present study, we measured the levels of NO metabolites, nitrite and nitrate, and cyclic GMP in the cerebrospinal fluid (CSF) of human subjects without neurological or psychiatric disorders. There were no age-related changes in the CSF levels of either nitrite, nitrate or cyclic GMP. These results suggest that NO production in the brain may be maintained during the aging process.
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Affiliation(s)
- K Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University School of Medicine, Japan
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Aoki T, Cox D, Senzaki K, Seki J, Tanaka A, Takasugi H, Motoyama Y. Comparison of the antithrombotic effects of FK633, GPIIb/IIIa antagonist, and aspirin in a guinea pig thrombosis model. Thromb Res 1998; 89:129-36. [PMID: 9622041 DOI: 10.1016/s0049-3848(97)00308-3] [Citation(s) in RCA: 12] [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: 02/07/2023]
Abstract
Antiplatelet and antithrombotic effects of FK633 (a GPIIb/IIIa antagonist) and aspirin were compared. FK633 at 0.32 mg/kg i.v. or aspirin at 10 mg/ kg i.v. inhibited ex vivo collagen-induced aggregation by >50% for 1 hour in guinea pigs. However, aspirin was very weak in inhibiting ADP-induced aggregation. In vivo antithrombotic effects of FK633 and aspirin were compared using a FeCl3-induced carotid artery thrombosis model in guinea pigs. Pretreatment with 0.32 mg/kg i.v. of FK633 significantly prevented occlusive thrombus formation, but aspirin at 10 mg/kg i.v. did not. In thrombolysis experiments, adjunctive use of FK633 (0.32 mg/kg i.v.) with rt-PA (0.3 mg/kg bolus+1.0 mg/kg/hr) achieved reperfusion in five of five animals without reocclusion. Aspirin (10O mg/kg i.v.) with rt-PA also achieved reperfusion in three of five animals with high incidence of reocclusion. These results suggest that FK633 may be a more effective antithrombotic agent than aspirin due to its agonist-independent antiplatelet effects.
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Affiliation(s)
- T Aoki
- Department of Pharmacology, New Drug Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Osaka, Japan.
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Yamada K, Senzaki K, Komori Y, Nikai T, Sugihara H, Nabeshima T. Changes in extracellular nitrite and nitrate levels after inhibition of glial metabolism with fluorocitrate. Brain Res 1997; 762:72-8. [PMID: 9262160 DOI: 10.1016/s0006-8993(97)00372-7] [Citation(s) in RCA: 11] [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: 02/05/2023]
Abstract
The role of glial cells in nitric oxide production in the cerebellum of conscious rats was investigated with a glial selective metabolic inhibitor, fluorocitrate. The levels of nitric oxide metabolites (nitrite plus nitrate) in the dialysate following in vivo microdialysis progressively increased to more than 2-fold the basal levels during a 2-h infusion of fluorocitrate (1 mM), and the increase persisted for more than 2 h after the treatment. Pretreatment with N(G)-nitro-L-arginine methyl ester attenuated the fluorocitrate-induced increase in nitric oxide metabolite levels. None of the glutamate receptor antagonists, including D(-)-2-amino-5-phosphonopentanoic acid, 6,7-dinitroquinoxaline-2,3-dione, and (+/-)-alpha-methyl-4-carboxyphenylglycine, inhibited the fluorocitrate-induced increase. The L-arginine-induced increase was significantly reduced by fluorocitrate treatment, while N-methyl-D-aspartate, (+)-alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid, and trans-(+/-)-1-amino-(1S,3R)-cyclopentane-dicarboxylic acid increased nitric oxide metabolites levels in the fluorocitrate-treated rats, as much as in control animals. These results suggest that glial cells play an important role in modulating nitric oxide production in the cerebellum by regulating L-arginine availability.
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Affiliation(s)
- K Yamada
- Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University School of Medicine, Showa-ku, Japan
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Aoki T, Cox D, Senzaki K, Seki J, Tanaka A, Takasugi H, Motoyama Y. The anti-platelet and anti-thrombotic effects of FK633, a peptide-mimetic GPIIB/IIIA antagonist. Thromb Res 1996; 81:439-50. [PMID: 8907293 DOI: 10.1016/0049-3848(96)00016-3] [Citation(s) in RCA: 31] [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: 02/03/2023]
Abstract
The anti-platelet and anti-thrombotic properties of FK633, a peptide mimetic GPIIb/IIIa antagonist were studied. In human platelet rich plasma, FK633 inhibited ADP-, collagen-, thrombin-, and PAF-induced platelet aggregation with IC50 values of 103, 87, 98, and 239 nM, respectively. RGDS acted similarly, but it's potency was about 1,000 times weaker than FK633, FK633 inhibited 125I-fibrinogen binding to human washed platelet with an IC50 of 88 nM. FK633 did not inhibit alphavbeta3, alpha5beta1, and alphavbeta1 integrin-mediated cellular adhesion up to 1.0mM, while RGDS inhibited all these interactions. In dogs, bolus injection of FK633 at 0.1 mg/kg significantly suppressed ex vivo ADP-induced platelet aggregation (>40% inhibition) and thrombus formation at stenosed and injured coronary artery, but did not prolong template bleeding time. However, FK633 inhibited >90% ADP-induced aggregation at 0.32 mg/kg, causing significant prolongation of the bleeding time. Thus, FK633 is a specific GPIIb/IIIa antagonist with potent anti-thrombotic effect in vivo, but careful dosing study might be necessary to avoid the bleeding complications in the clinic.
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Affiliation(s)
- T Aoki
- Department of Pharmacology, New Drug Research Laboratories, Fujisawa Pharmaceutical Co., Ltd
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Ihara H, Hirabayashi M, Senzaki K, Kimura Y, Kezuka H. Superconductivity of B1-MoN films annealed under high pressure. Phys Rev B Condens Matter 1985; 32:1816-1817. [PMID: 9937228 DOI: 10.1103/physrevb.32.1816] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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32
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Ihara H, Kimura Y, Senzaki K, Kezuka H, Hirabayashi M. Electronic structures of B1 MoN, fcc Mo2N, and hexagonal MoN. Phys Rev B Condens Matter 1985; 31:3177-3178. [PMID: 9936193 DOI: 10.1103/physrevb.31.3177] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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