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Arafa A, Kashima R, Shimamoto K, Kawachi H, Teramoto M, Sakai Y, Gao Q, Matsumoto C, Kokubo Y. Hypertensive disorders of pregnancy and the risk of dementia: a systematic review and meta-analysis of cohort studies. Hypertens Res 2024; 47:859-866. [PMID: 38040840 DOI: 10.1038/s41440-023-01520-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 10/16/2023] [Accepted: 11/05/2023] [Indexed: 12/03/2023]
Abstract
This study aimed to investigate the association between hypertensive disorders of pregnancy (HDP) and subsequent risk of dementia using a systematic review and meta-analysis of cohort studies. We searched PubMed and Scopus for eligible studies that investigated the association between HDP and dementia risk. Using the random-effects model, pooled hazard ratio (HR) and 95% confidence interval (CI) of dementia risk in women with HDP were calculated. We applied the I2 statistic to measure heterogeneity across studies and the test for funnel plot asymmetry to evaluate publication bias. Six cohort studies were eligible: three from the United States, two from Sweden, and one from Denmark. When combined, HDP was associated with the risk of dementia: pooled HR (95% CI) = 1.31 (1.12, 1.53). The heterogeneity across studies was moderate (I2 = 47.3%, p-heterogeneity = 0.091), but no signs of publication bias were detected. The association of HDP with vascular dementia was stronger than that with Alzheimer's disease: pooled HRs (95% CIs) = 1.66 (1.13, 2.43) and 1.29 (0.97, 1.72), respectively. In conclusion, HDP was associated with a higher risk of dementia and this association was more prominent with vascular dementia.
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Affiliation(s)
- Ahmed Arafa
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan.
- Department of Public Health, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt.
| | - Rena Kashima
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Cardiovascular Pathophysiology and Therapeutics, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Keiko Shimamoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Haruna Kawachi
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Masayuki Teramoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yukie Sakai
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Qi Gao
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Chisa Matsumoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Shinjuku, Japan
| | - Yoshihiro Kokubo
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
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Arafa A, Kawachi H, Matsumoto C, Teramoto M, Yasui Y, Kato Y, Matsuo M, Nakao YM, Kashima R, Kokubo Y. The association between the estimated glomerular filtration rate and cognitive impairment: the Suita Study. Hypertens Res 2024; 47:672-676. [PMID: 37872375 DOI: 10.1038/s41440-023-01476-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 10/25/2023]
Abstract
This cross-sectional study investigated the association between the estimated glomerular filtration rate (eGFR), a measure of chronic kidney disease (CKD), and cognitive impairment. We used data from 6215 Japanese individuals registered in the Suita Study. Cognitive impairment was defined as a Mini-Mental State Examination (MMSE) score of ≤ 26. Logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (95% CIs) of cognitive impairment for eGFR 45-59.9 and < 45 mL/min/1.73 m2 (mild and moderate-to-severe eGFR reductions) compared to eGFR ≥ 60 mL/min/1.73 m2 (normal eGFR). The results showed that both mild and moderate-to-severe eGFR reductions were associated with cognitive impairment: ORs (95% CIs) = 1.49 (1.22-1.83) and 2.35 (1.69-3.26), respectively (p-trend < 0.001). Each increment of eGFR by 10 mL/min/1.73m2 was associated with 4.8% lower odds of cognitive impairment. In conclusion, eGFR reduction was associated with cognitive impairment. Managing CKD is essential for preventing cognitive impairment.
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Affiliation(s)
- Ahmed Arafa
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan.
- Department of Public Health, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt.
| | - Haruna Kawachi
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Chisa Matsumoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Shinjuku, Japan
| | - Masayuki Teramoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yuka Yasui
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Graduate School of Human Life and Science, Doshisha Women's College of Liberal Arts, Kyoto, Japan
| | - Yuka Kato
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Division of Health Sciences, Osaka University Graduate School of Medicine, Suita, Japan
| | - Miki Matsuo
- Department of Hypertension and Nephrology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yoko M Nakao
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Pharmacoepidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan
| | - Rena Kashima
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yoshihiro Kokubo
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
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Kawachi H, Teramoto M, Muraki I, Shirai K, Yamagishi K, Tamakoshi A, Iso H. Childhood secondhand smoke exposure and respiratory disease mortality among never-smokers: the Japan collaborative cohort study for evaluation of cancer risk. J Public Health (Oxf) 2023; 45:604-611. [PMID: 37164769 DOI: 10.1093/pubmed/fdad056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 02/17/2023] [Indexed: 05/12/2023] Open
Abstract
BACKGROUND The main source of secondhand smoke (SHS) exposure during childhood occurs at home due to close family members who smoke. This study examined the association between childhood SHS exposure and the risk of respiratory disease mortality among non-smoking adults. METHODS Data from 44 233 never-smoking Japanese men and women aged 40-79 years who participated in the JACC study between 1988 and 1990 were analyzed. The Cox proportional hazards model was used to calculate hazard ratios and 95% confidence intervals of respiratory disease mortality according to the number of smoking family members during childhood. Subdistribution HRs (SHRs) were calculated as a competing risk analysis. RESULTS A total of 735 deaths from respiratory diseases were documented in a median follow-up of 19.2 years. Living with three or more smoking family members during childhood was associated with a higher risk of respiratory disease mortality in adulthood among women; multivariable SHR compared with participants with no family member smokers during childhood was 1.60 (1.01-2.54) for participants with three or more family members who smoked during their childhood. CONCLUSIONS SHS exposure from three or more family members during childhood was associated with an increased risk of respiratory disease-related mortality in adulthood.
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Affiliation(s)
- Haruna Kawachi
- Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
| | - Masayuki Teramoto
- Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
| | - Isao Muraki
- Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
| | - Kokoro Shirai
- Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
| | - Kazumasa Yamagishi
- Department of Public Health Medicine, Institute of Medicine, and Health Services Research and Development Center, University of Tsukuba, Tsukuba, 305-8575, Japan
| | - Akiko Tamakoshi
- Department of Public Health, Hokkaido University, Graduate School of Medicine, Sapporo, 060-8638, Japan
| | - Hiroyasu Iso
- Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
- Institute for Global Health Policy Research, Bureau of International Health Cooperation, National Center for Global Health and Medicine, Tokyo, 162-8655, Japan
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Arafa A, Kashima R, Kokubo Y, Teramoto M, Sakai Y, Nosaka S, Kawachi H, Shimamoto K, Matsumoto C, Nakao YM, Gao Q, Izumi C. Serum cholesterol levels and the risk of brain natriuretic peptide-diagnosed heart failure in postmenopausal women: a population-based prospective cohort study. Menopause 2023:00042192-990000000-00209. [PMID: 37402280 DOI: 10.1097/gme.0000000000002215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
OBJECTIVE Hormonal changes during menopause can disturb serum cholesterol which is closely associated with cardiovascular disease. This study investigated the prospective association between serum cholesterol and heart failure (HF) risk in postmenopausal women. METHODS We analyzed data from 1,307 Japanese women, aged 55 to 94 years. All women had no history of HF, and their baseline brain natriuretic peptide (BNP) levels were less than 100 pg/mL. During the follow-ups conducted every 2 years, HF was diagnosed among women who developed BNP of 100 pg/mL or greater. Cox proportional hazard models were applied to calculate hazard ratios and 95% CI of HF for women per their baseline total cholesterol, low-density lipoprotein cholesterol, and high-density lipoprotein cholesterol (HDL-C) levels. The Cox regression models were adjusted for age, body mass index, smoking, alcohol drinking, hypertension, diabetes, cardiac murmurs, arrhythmia, stroke or ischemic heart disease, chronic kidney disease, and lipid-lowering agent use. RESULTS Within an 8-year median follow-up, 153 participants developed HF. In the multivariable-adjusted model, women with total cholesterol of 240 mg/dL or greater (compared with 160-199 mg/dL) and HDL-C of 100 mg/dL or greater (compared with 50-59 mg/dL) showed an increased risk of HF: hazard ratios (95% CI) = 1.70 (1.04-2.77) and 2.70 (1.10-6.64), respectively. The results remained significant after further adjusting for baseline BNP. No associations were observed with low-density lipoprotein cholesterol. CONCLUSIONS Total cholesterol of 240 mg/dL or greater and HDL-C of 100 mg/dL or greater were positively associated with the risk of HF in postmenopausal Japanese women.
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Affiliation(s)
| | | | - Yoshihiro Kokubo
- From the Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - Yukie Sakai
- From the Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Saya Nosaka
- From the Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - Keiko Shimamoto
- From the Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Chisa Matsumoto
- Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Shinjuku, Japan
| | | | - Qi Gao
- From the Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Chisato Izumi
- Department of Heart Failure, National Cerebral and Cardiovascular Center, Suita, Japan
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Arafa A, Kashima R, Kokubo Y, Teramoto M, Sakai Y, Nosaka S, Kawachi H, Shimamoto K, Matsumoto C, Gao Q, Izumi C. Alcohol consumption and the risk of heart failure: the Suita Study and meta-analysis of prospective cohort studies. Environ Health Prev Med 2023; 28:26. [PMID: 37150604 DOI: 10.1265/ehpm.22-00231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
BACKGROUND Alcohol consumption is a modifiable lifestyle, but its role in heart failure (HF) development is controversial. Herein, we investigated the prospective association between alcohol consumption and HF risk. METHODS A total of 2,712 participants (1,149 men and 1,563 women) from the Suita Study were followed up every two years. Cox regression was applied to calculate the hazard ratios (HRs) and 95% confidence intervals (95% CIs) of HF risk for heavy drinking (≥46 g/day in men or ≥23 g/day in women) and never drinking compared to light drinking (<23 g/day in men or <11.5 g/day in women). Then, we combined the results of the Suita Study with those from other eligible prospective cohort studies in a meta-analysis using the random-effects model. RESULTS In the Suita Study, within a median follow-up period of 8 years, 319 HF cases (162 in men and 157 in women) were detected. In men, but not women, never and heavy drinking carried a higher risk of HF than light drinking: HRs (95% CIs) = 1.65 (1.00, 2.73) and 2.14 (1.26, 3.66), respectively. Alike, the meta-analysis showed a higher risk of HF among heavy drinkers: HR (95% CI) = 1.37 (1.15, 1.62) and abstainers: HR (95% CI) = 1.18 (1.02, 1.37). CONCLUSION We indicated a J-shaped association between alcohol consumption and HF risk among Japanese men. The results of the meta-analysis came in line with the Suita Study. Heavy-drinking men should be targeted for lifestyle modification interventions.
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Affiliation(s)
- Ahmed Arafa
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
- Department of Public Health, Faculty of Medicine, Beni-Suef University
| | - Rena Kashima
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
- Department of Cardiovascular Pathophysiology and Therapeutics, Graduate School of Medicine, Osaka University
| | - Yoshihiro Kokubo
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Masayuki Teramoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Yukie Sakai
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Saya Nosaka
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Haruna Kawachi
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
- Department of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University
| | - Keiko Shimamoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Chisa Matsumoto
- Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital
| | - Qi Gao
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Chisato Izumi
- Department of Heart Failure and Transplantation, National Cerebral and Cardiovascular Center
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Arafa A, Kashima R, Yasui Y, Kawachi H, Matsumoto C, Nosaka S, Teramoto M, Matsuo M, Kokubo Y. Development of new scores for atherosclerotic cardiovascular disease using specific medical examination items: the Suita Study. Environ Health Prev Med 2023; 28:61. [PMID: 37899208 PMCID: PMC10613553 DOI: 10.1265/ehpm.23-00099] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 08/13/2023] [Indexed: 10/31/2023] Open
Abstract
BACKGROUND We previously developed risk models predicting stroke, coronary heart disease (CHD), and cardiovascular disease (CVD) among Japanese people from the Suita Study. Yet, applying these models at the national level was challenging because some of the included risk factors differed from those collected in the Japanese governmental health check-ups, such as Tokutei-Kenshin. We, therefore, conducted this study to develop new risk models for stroke, CHD, and atherosclerotic CVD (ASCVD), based on data from the Suita Study. The new models used traditional cardiovascular risk factors similar to those in the Japanese governmental health check-ups. METHODS We included 7,413 participants, aged 30-84 years, initially free from stroke and CHD. All participants received baseline health examinations, including a questionnaire assessing their lifestyle and medical history, medical examination, and blood and urine analysis. The risk factors of stroke, CHD, and ASCVD (cerebral infarction or CHD) were determined using the multivariable-adjusted Cox regression. The models' performance was assessed using the C-statistics for discrimination and the Hosmer-Lemeshow for calibration. We also developed three simple scores (zero to 100) that could predict the 10-year incidence of stroke, CHD, and ASCVD. RESULTS Within 110,428 person-years (median follow-up = 16.6 years), 410 stroke events, 288 CHD events, and 527 ASCVD events were diagnosed. Age, smoking, hypertension, and diabetes were associated with stroke, CHD, and ASCVD risk. Men and those with decreased high-density lipoproteins or increased low-density lipoproteins showed a higher risk of CHD and ASCVD. Urinary proteins were associated with an increased risk of stroke and ASCVD. The C-statistic values of the risk models were >0.750 and the p-values of goodness-of-fit were >0.30. The 10-year incidence of stroke, CVD, and ASCVD events was 3.8%, 3.5%, and 5.7% for scores 45-54, 10.3%, 11.8%, and 19.6% for scores 65-74, and 27.7%, 23.5%, and 60.5% for scores ≥85, respectively. CONCLUSIONS We developed new Suita risk models for stroke, CHD, and ASCVD using variables similar to those in the Japanese governmental health check-ups. We also developed new risk scores to predict incident stroke, CHD, and ASCVD within 10 years.
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Affiliation(s)
- Ahmed Arafa
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Public Health, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Rena Kashima
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Cardiovascular Pathophysiology and Therapeutics, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Yuka Yasui
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Graduate School of Human Life and Science, Doshisha Women’s College of Liberal Arts, Kyoto, Japan
| | - Haruna Kawachi
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
- Department of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Chisa Matsumoto
- Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Shinjuku, Japan
| | - Saya Nosaka
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Masayuki Teramoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Miki Matsuo
- Department of Hypertension and Nephrology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yoshihiro Kokubo
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, Suita, Japan
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Arafa A, Kokubo Y, Kashima R, Teramoto M, Sakai Y, Nosaka S, Shimamoto K, Kawachi H, Matsumoto C, Kusano K. Association Between White Blood Cell Count and Atrial Fibrillation Risk - A Population-Based Prospective Cohort Study. Circ J 2022; 87:41-49. [PMID: 36288949 DOI: 10.1253/circj.cj-22-0378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND The incidence and prevalence of atrial fibrillation (AF) are increasing. The white blood cell (WBC) count is an indicator of systemic inflammation and is related to increased cardiovascular disease risk. Using data from the Suita Study, we investigated the association between WBC count and AF risk in the general Japanese population.Methods and Results: This prospective cohort study included 6,884 people, aged 30-84 years, with no baseline AF. Cox regression was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for AF incidence by WBC count quintile. Within a median follow-up period of 14.6 years, 312 AF cases were diagnosed. Compared with the lowest WBC count quintile, the highest quintile was associated with an increased AF risk (HR 1.57; 95% CI 1.07-2.29). The association was more pronounced among women than men (HR 2.16 [95% CI 1.10-4.26] and 1.55 [95% CI 0.99-2.44], respectively; P interaction=0.07), and among current than non-smokers (HR 4.66 [95% CI 1.89-11.50] and 1.61 [95% CI 1.01-2.57], respectively; P interaction=0.20). For each 1.0×109-cells/L increment in WBC count, AF risk increased by 9% in men (9% in non-smokers, 10% in current smokers) and 20% in women (13% in non-smokers, 32% in current smokers). CONCLUSIONS A higher WBC count was positively associated with an elevated AF risk in the general Japanese population, especially in women who smoked.
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Affiliation(s)
- Ahmed Arafa
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center.,Department of Public Health, Faculty of Medicine, Beni-Suef University
| | - Yoshihiro Kokubo
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Rena Kashima
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center.,Department of Cardiovascular Pathophysiology and Therapeutics, Graduate School of Medicine, Osaka University
| | - Masayuki Teramoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Yukie Sakai
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Saya Nosaka
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Keiko Shimamoto
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center
| | - Haruna Kawachi
- Department of Preventive Cardiology, National Cerebral and Cardiovascular Center.,Department of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University
| | - Chisa Matsumoto
- Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital
| | - Kengo Kusano
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center
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Arafa A, Teramoto M, Maeda S, Sakai Y, Nosaka S, Gao Q, Kawachi H, Kashima R, Matsumoto C, Kokubo Y. Playing a musical instrument and the risk of dementia among older adults: a systematic review and meta-analysis of prospective cohort studies. BMC Neurol 2022; 22:395. [PMID: 36303117 PMCID: PMC9608922 DOI: 10.1186/s12883-022-02902-z] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/29/2022] [Indexed: 11/10/2022] Open
Abstract
Background Engaging in leisure activities was suggested to protect older adults from dementia. However, the association between playing a musical instrument and the risk of dementia is not well-established. This study aimed to investigate this association in older adults using a systematic review and meta-analysis of prospective cohort studies. Methods Pooled hazard ratio (HR) and 95% confidence interval (CI) of having dementia for older adults playing a musical instrument were calculated using the random-effects model. We performed the I2 statistic to detect heterogeneity across studies and the test for funnel plot asymmetry to assess publication bias. The risk of bias assessment was conducted using the modified Newcastle–Ottawa Scale. Results A total of three prospective cohort studies were found eligible: two from the U.S. and one from Japan. Playing a musical instrument, in the meta-analysis, was significantly associated with a decreased risk of dementia (HR = 0.64; 95% CI: 0.41, 0.98) among older adults. No signs of significant heterogeneity across studies (I2 = 23.3% and p-heterogeneity = 0.27) or publication bias (z= -1.3 and p-publication bias = 0.18) were identified. Conclusion Playing a musical instrument was associated with a decreased risk of dementia among older adults. Older adults should be encouraged to engage in leisure activities, especially playing musical instruments. Supplementary Information The online version contains supplementary material available at 10.1186/s12883-022-02902-z.
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Affiliation(s)
- Ahmed Arafa
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan ,grid.411662.60000 0004 0412 4932Department of Public Health, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Masayuki Teramoto
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan ,grid.266102.10000 0001 2297 6811Department of Epidemiology and Biostatistics, University of California, San Francisco, USA
| | - Saori Maeda
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan
| | - Yukie Sakai
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan
| | - Saya Nosaka
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan
| | - Qi Gao
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan
| | - Haruna Kawachi
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan ,grid.136593.b0000 0004 0373 3971Department of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Rena Kashima
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan ,grid.136593.b0000 0004 0373 3971Department of Cardiovascular Pathophysiology and Therapeutics, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Chisa Matsumoto
- grid.412781.90000 0004 1775 2495Department of Cardiology, Center for Health Surveillance and Preventive Medicine, Tokyo Medical University Hospital, Shinjuku, Japan
| | - Yoshihiro Kokubo
- grid.410796.d0000 0004 0378 8307Department of Preventive Cardiology, National Cerebral and Cardiovascular Center, 6-1, Kishibe- Shinmachi, 564-8565 Suita, Osaka Japan
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FUKUSUMI Y, Yasuda H, Zhang Y, Kawachi H. POS-468 A UNIQUE VARIANT OF NEUREXIN-1α CONTAINING THE SPLICING SITE #1, 3, 4, 5 IS EXPRESSED AT SLIT DIAPHRAGM OF GLOMERULAR PODOCYTE AND INTERACTS WITH NEPHRIN. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.498] [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: 11/25/2022] Open
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Hoffman EN, Kawachi H, Hirayama A, Zhang J, Murayama A, Masui J, Fujita S, Mori Y, Hirayama T, Ohara T, Asada R, Iso H. Factors associated with prolonged duration of viral clearance in non-severe SARS-CoV-2 patients in Osaka, Japan. Environ Health Prev Med 2021; 26:115. [PMID: 34872493 PMCID: PMC8647504 DOI: 10.1186/s12199-021-01035-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/12/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND We investigated factors associated with prolonged viral clearance of SARS-CoV-2 among non-severe adult patients in Osaka, Japan. A total of 706 laboratory-confirmed COVID-19 patients were enrolled in this longitudinal observational study between 29 January 2020 and 31 May 2020, across 62 hospitals and three non-hospital recuperation facilities. METHODS Logistic regression analysis was performed to investigate the factors associated with prolonged (29 days: upper 25% in duration) viral clearance of SARS-CoV-2. Linear regression analysis was conducted to assess these factors 14 days after symptom onset. RESULTS The median duration of viral clearance was 22 days from symptom onset. After adjustment for sex, age, symptoms, comorbidity, and location of recuperation, comorbidities were associated with prolonged duration: (OR, 1.77 [95% CI, 1.11-2.82]) for one, (OR, 2.47 [95% CI, 1.32-4.61]) for two or more comorbidities. Viral clearance 14 days after symptom onset was 3 days longer for one comorbidity and 4 days longer for two or more comorbidities compared to clearance when there was no comorbidity. CONCLUSION The presence of comorbidity was a robust factor associated with a longer duration of viral clearance, extending by 3 to 4 days compared to patients with no comorbidity.
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Affiliation(s)
- Emma Nakagawa Hoffman
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
- Public Health, Department of Social Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Haruna Kawachi
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
- Public Health, Department of Social Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Atsushi Hirayama
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
- Public Health, Department of Social Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Jingwen Zhang
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
- Public Health, Department of Social Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan
| | - Ayumi Murayama
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Jun Masui
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Satomi Fujita
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Yasushi Mori
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Takanori Hirayama
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Toshitake Ohara
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Rumiko Asada
- Osaka Prefectural Government, Department of Public Health and Medical Affairs, 1-2 Otemae, Chuo-ku, Osaka, 540-8570, Japan
| | - Hiroyasu Iso
- Public Health, Department of Social Medicine, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka, Suita City, Osaka, 565-0871, Japan.
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Fukushima T, Nakano J, Ishii S, Natsuzako A, Kawachi H, Sakamoto J, Miyazaki Y, Okita M. Influence of Hemoglobin Level on Muscle and Physical Functions, Activities of Daily Living, and Quality of Life in Patients With Hematological Malignancies. Integr Cancer Ther 2019; 18:1534735419842196. [PMID: 30947558 PMCID: PMC6452594 DOI: 10.1177/1534735419842196] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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] [Indexed: 12/27/2022] Open
Abstract
Purpose. Patients with hematological malignancies often present with reduced muscle and physical functions, which are caused by the disease or related treatment. Moreover, patients with hematological malignancies rapidly develop low hemoglobin levels, and this may affect muscle and physical functions. This study aimed to identify the influence of hemoglobin levels on muscle and physical functions in patients with hematological malignancies. Methods. Using a cross-sectional study design, this study included 60 patients with hematological malignancies (mean age = 68.0 ± 10.2 years, women 56.7%) who were hospitalized for chemotherapy- and radiotherapy-related side effects and underwent examination for skeletal muscle mass (SMM), muscle strength, physical function, activities of daily living (ADLs), psychological status, and quality-of-life (QOL), including physical symptoms. Participants were divided into 3 groups according to tertiles of hemoglobin levels: low (n = 19), middle (n = 20), and high (n = 21). Evaluation items were compared among the 3 groups. Results. There was no significant difference among the 3 groups in terms of SMM. The low hemoglobin group showed significantly higher values of fatigue and dyspnea and lower values of muscle strength, ADLs, and QOL than the high hemoglobin group. Conclusions. Hemoglobin levels did not affect SMM; however, muscle weakness, decrease in physical function, physical symptoms such as fatigue and dyspnea, and decline in ADLs and QOL were observed in patients with low hemoglobin levels.
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Affiliation(s)
- Takuya Fukushima
- 1 Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,2 Nagasaki University Hospital, Nagasaki, Japan
| | - Jiro Nakano
- 1 Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shun Ishii
- 2 Nagasaki University Hospital, Nagasaki, Japan
| | | | | | - Junya Sakamoto
- 1 Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasushi Miyazaki
- 4 Department of Hematology, Atomic Bomb Disease and Hibakusha Medicine Unit, NagasakiUniversity Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Minoru Okita
- 1 Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Kawachi H, Tamiya M, Tamiya A, Ishii S, Hirano K, Matsumoto H, Yokoyama T, Ishida T, Ryota K, Fujimoto D, Hosoya K, Suzuki H, Hirashima T, Kanazu M, Sawa N, Uchida J, Morita M, Makio T, Hara S, Kumagai T. Prognostic impact of metastatic sites for pembrolizumab efficacy as first-line therapy in patients with PD-L1 tumour proportion score (TPS) ≥ 50% advanced non-small cell lung cancer: A retrospective multicenter study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz260.036] [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: 11/12/2022] Open
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13
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Sato Y, Fujimoto D, Hosoya K, Kawachi H, Hamakawa H, Takahashi Y, Kokubo M, Hara S, Tomii K. Efficacy of local therapy for patients with oligometastatic non-small cell lung cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy425.017] [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: 11/14/2022] Open
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14
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Miyamoto M, Kuzuya A, Noda Y, Uemura K, Asada-Utsugi M, Fukusumi Y, Kawachi H, Ito S, Takahashi R, Kinoshita A. SV2B can regulate BACE1 localization in the hippocampus. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2151] [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: 11/16/2022]
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15
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Kawachi H, Fujimoto D, Morimoto T, Ito M, Teraoka S, Sato Y, Nagata K, Nakagawa A, Otsuka K, Imai Y, Tomii K. Characteristics and prognostic impact of advanced non-small-cell lung cancer patients who were ineligible for clinical trials. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx380.075] [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: 11/13/2022] Open
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16
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Tsubaki M, Kawachi H. P-293 The outcomes of the fecal occult blood testing for colorectal cancer in one local hospital in Chile: results of a first two-year international collaborative study between Chile and Japan. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.290] [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: 11/14/2022] Open
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17
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Kim J, Choi J, Chang S, Shin K, Park SH, Kim HW, Oh H, Yoon MJ, Lee EY, Lee EB, Kawachi H, Kohsaka H, Song YW. FRI0015 The effect of cxcl10 blockade in c protein-induced myositis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1143] [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]
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18
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Maeda H, Umezawa H, Hattori T, Nakamura T, Umeda T, Kobayashi H, Kawachi H, Iida A, Shiono M. Early and late outcomes of inflammatory abdominal aortic aneurysms: comparison with the outcomes after open surgical and endovascular aneurysm repair in literature reviews. INT ANGIOL 2013; 32:67-73. [PMID: 23435394] [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: 06/01/2023]
Abstract
AIM The aim of this study was to analyze the clinical characteristics, operative management and early and late outcomes of Inflammatory abdominal aortic aneurysms (IAAAs) in our vascular service, retrospectively and to compare with the outcomes of open and endovascular aneurysm repair (EVAR) in the patients with IAAAs in literature reviews. METHODS Between January 1990 and December 2011, this series included twenty-four patients with IAAAs who underwent surgical treatment. The mean length of follow-up was 37.6 months (range 3-108). Kaplan-Meier life tables were used to calculate survival rate. RESULTS Fifteen patients (60%) were symptomatic including 3 patients with hydronephrosis. Seven patients with severe symptoms underwent emergency operations. Twenty four patients underwent open surgical AAA repair. The 30 - day mortality rates were 0%. All patients had successful post operative courses and followed as outpatients in an elective situation. The ten year cumulative survival rate was 70%. The early and late mortality was the same for open repair compared to non-inflammatory AAA. CONCLUSIONS IAAA compared with non-IAAA is associated with a higher incidence of preoperative morbidity, however operative mortality rates are lower. EVAR has lower early operative mortality rates, however, there are some problems such as remaining periaortic fibrosis and hydronephrosis in approximately half of IAAA patients after EVAR.
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Affiliation(s)
- H Maeda
- Cardiovascular Surgery, Nihon University School of Medicine, Tokyo, Japan.
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19
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Sofue T, Kiyomoto H, Kobori H, Urushihara M, Nishijima Y, Kaifu K, Hara T, Matsumoto S, Ichimura A, Ohsaki H, Hitomi H, Kawachi H, Hayden MR, Whaley-Connell A, Sowers JR, Ito S, Kohno M, Nishiyama A. Early treatment with olmesartan prevents juxtamedullary glomerular podocyte injury and the onset of microalbuminuria in type 2 diabetic rats. Am J Hypertens 2012; 25:604-11. [PMID: 22318512 PMCID: PMC3328599 DOI: 10.1038/ajh.2012.1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Studies were performed to determine if early treatment with an angiotensin II (Ang II) receptor blocker (ARB), olmesartan, prevents the onset of microalbuminuria by attenuating glomerular podocyte injury in Otsuka Long-Evans Tokushima Fatty (OLETF) rats with type 2 diabetes mellitus. METHODS OLETF rats were treated with either a vehicle, olmesartan (10 mg/kg/day) or a combination of nonspecific vasodilators (hydralazine 15 mg/kg/day, hydrochlorothiazide 6 mg/kg/day, and reserpine 0.3 mg/kg/day; HHR) from the age of 7-25 weeks. RESULTS OLETF rats were hypertensive and had microalbuminuria from 9 weeks of age. At 15 weeks, OLETF rats had higher Ang II levels in the kidney, larger glomerular desmin-staining areas (an index of podocyte injury), and lower gene expression of nephrin in juxtamedullary glomeruli, than nondiabetic Long-Evans Tokushima Otsuka (LETO) rats. At 25 weeks, OLETF rats showed overt albuminuria, and higher levels of Ang II in the kidney and larger glomerular desmin-staining areas in superficial and juxtamedullary glomeruli compared to LETO rats. Reductions in mRNA levels of nephrin were also observed in superficial and juxtamedullary glomeruli. Although olmesartan did not affect glucose metabolism, it decreased blood pressure and prevented the renal changes in OLETF rats. HHR treatment also reduced blood pressure, but did not affect the renal parameters. CONCLUSIONS This study demonstrated that podocyte injury occurs in juxtamedullary glomeruli prior to superficial glomeruli in type 2 diabetic rats with microalbuminuria. Early treatment with an ARB may prevent the onset of albuminuria through its protective effects on juxtamedullary glomerular podocytes.
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Ogane S, Tamura H, Tougou T, Kawachi H, Onoda N, Shibahara T. A case of carcinoma of maxillary sinus treated by multidisciplinary therapy. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.469] [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: 10/16/2022]
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21
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Kuramochi J, Inase N, Miyazaki Y, Kawachi H, Takemura T, Yoshizawa Y. Lung cancer in chronic hypersensitivity pneumonitis. ACTA ACUST UNITED AC 2011; 82:263-7. [PMID: 21625073 DOI: 10.1159/000327738] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Accepted: 03/23/2011] [Indexed: 11/19/2022]
Abstract
BACKGROUND So far, the association of lung cancer with chronic hypersensitivity pneumonitis (CHP) has not been studied. OBJECTIVE We examined the prevalence and revealed clinical features of lung cancer in CHP. METHODS We retrospectively reviewed the medical records from 1994 through 2005 and identified 11 patients (15 lesions) with lung cancer among 104 patients with CHP. Their clinical features and histopathological findings were analyzed. RESULTS Ten men and 1 woman with a median age of 68.9 years were included. All patients had a smoking history. The most prevalent histopathological type of lung cancer was squamous cell carcinoma (53%), and all tumors were located in the peripheral region of the lung. Four patients suffered from lung cancer after the diagnosis of CHP and 1 patient had lung cancer before the diagnosis of CHP. The histological pattern of CHP showed a predominantly usual interstitial pneumonia-like lesion. Tumors were located adjacent to honeycombing in 7 (47%) of 15 lesions, bullae in 4 (27%) lesions, and relatively normal lung in 4 lesions. CONCLUSIONS Since the prevalence of lung cancer in CHP seems to be high (10.6%) as seen in idiopathic pulmonary fibrosis, physicians should be aware of the possible complication of lung cancer in CHP.
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Affiliation(s)
- J Kuramochi
- Department of Integrated Pulmonology, Tokyo Medical and Dental University, Tokyo, Japan
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22
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Brooks MA, Choi CW, Lunt DK, Kawachi H, Smith SB. Subcutaneous and intramuscular adipose tissue stearoyl-coenzyme A desaturase gene expression and fatty acid composition in calf- and yearling-fed Angus steers. J Anim Sci 2011; 89:2556-70. [PMID: 21454869 DOI: 10.2527/jas.2010-3369] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We proposed that stearoyl-CoA desaturase (SCD) activity dictates fatty acid composition of adipose tissue and muscle in beef cattle, regardless of ruminal or hepatic fatty acid hydrogenation or desaturation. Twelve Angus steers were assigned to a calf-fed (CF) group and slaughtered at weaning (8 mo of age; n=4), 12 mo of age (n=4), or 16 mo of age (n=4). Twelve steers were assigned to a yearling-fed (YF) group and slaughtered at 12 mo of age (n=4), 16 mo of age (n=4), and 17.5 mo of age (n=4; 525 kg, market weight). Data were analyzed based on time on the corn-based finishing diet, with terminal age as a covariate, and orthogonal polynomial contrasts were tested on the main effects of treatment group and time on the finishing diet. Fatty acids from duodenal digesta, plasma, liver, LM, and subcutaneous and intramuscular adipose tissue were measured, and SCD gene expression was measured in intramuscular and subcutaneous adipose tissues. In duodenal digesta, palmitic and linoleic acids increased by 100% over the sampling period, α-linolenic acid decreased over the sampling period, and trans-vaccenic acid was greater in YF than in CF steers (all P < 0.01). The proportion of α-linolenic acid decreased over time in all tissues, including liver. The SCD index (ratio of SCD fatty acid products to SCD fatty acid substrates) increased over time in LM and in intramuscular and subcutaneous adipose tissues. The SCD:glyceraldehyde 3-phosphate dehydrogenase mRNA ratio was virtually undetectable at the initial sampling periods in subcutaneous adipose tissue of YF and CF steers, and it increased over time (P < 0.01). The SCD index and SCD:glyceraldehyde 3-phosphate dehydrogenase ratio were greater in intramuscular adipose tissue of CF steers than in that of YF steers. The SCD index did not change over time in liver and decreased over time in duodenal digesta. We conclude that, unlike essential fatty acids, the SFA and MUFA composition of adipose tissue is regulated by adipose tissue fatty acid desaturation, with little contribution from hepatic or duodenal fatty acids.
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Affiliation(s)
- M A Brooks
- Department of Animal Science, Texas Agricultural Experiment Station, Texas A&M University, College Station 77843, USA
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Chiba T, Kawachi H, Kawano T, Kumagai J, Kitagaki K, Sekine M, Uchida K, Kobayashi M, Sugihara K, Eishi Y. Independent histological risk factors for lymph node metastasis of superficial esophageal squamous cell carcinoma; implication of claudin-5 immunohistochemistry for expanding the indications of endoscopic resection. Dis Esophagus 2010; 23:398-407. [PMID: 19903192 DOI: 10.1111/j.1442-2050.2009.01023.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Endoscopic resection is curative for superficial esophageal squamous cell carcinoma (ESCC) limited to the lamina propria. Endoscopic resection is not recommended for superficial ESCC invading muscularis mucosa or submucosa, however, because of the high frequency of lymph node metastasis (LNM) in such patients. Methods to more accurately predict LNM by analysis of endoscopically resected specimens are needed. Patients with superficial ESCC who underwent surgery without prior chemoradiotherapy (n= 110) were retrospectively examined to determine whether LNM correlated with immunohistochemical parameters and conventional histological parameters, including depth of invasion and vascular permeation. Cancer cell expression of claudins-1, 5, and 7, E-cadherin, beta-catenin, and matrix metalloproteinase 7 was evaluated. Univariate analysis revealed that LNM correlated with claudin-5 expression, but not any other immunohistochemical parameter examined. Multivariate analysis revealed three independent risk factors for LNM: aberrant claudin-5 expression in cancer cells (odds ratio; OR [95% confidence interval]= 4.61[1.44-14.77]), depth of submucosal invasion greater than 200 microm (3.55 [1.02-13.17]), and positive lymphatic permeation (3.34 [1.22-9.15]). LNM was found in one of 29 (3.4%) patients with none of these three risk factors, and in 32 of 81 (39.5%) patients with one or more of these risk factors. In superficial ESCC, routine analysis of claudin-5 expression in cancer cells together with depth of invasion and lymphatic permeation may be useful for predicting LNM and thereby reducing the number of patients undergoing additional surgery after successful endoscopic resection.
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Affiliation(s)
- T Chiba
- Department of Human Pathology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Matsui I, Hamano T, Tomida K, Inoue K, Takabatake Y, Nagasawa Y, Kawada N, Ito T, Kawachi H, Rakugi H, Imai E, Isaka Y. Active vitamin D and its analogue, 22-oxacalcitriol, ameliorate puromycin aminonucleoside-induced nephrosis in rats. Nephrol Dial Transplant 2009; 24:2354-61. [DOI: 10.1093/ndt/gfp117] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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Kumagai Y, Kawada K, Yamazaki S, Iida M, Momma K, Odajima H, Kawachi H, Nemoto T, Kawano T, Takubo K. Endocytoscopic observation for esophageal squamous cell carcinoma: can biopsy histology be omitted? Dis Esophagus 2009; 22:505-12. [PMID: 19302209 DOI: 10.1111/j.1442-2050.2009.00952.x] [Citation(s) in RCA: 36] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We examined whether endocytoscopic observation of esophageal squamous cell carcinoma can replace the histologic examination of biopsy specimens. In a basic investigation, we examined 57 iodine-unstained areas in the resected specimens of the esophagus from 28 individuals. The endocytoscopic findings were graded from 0 to 3 in tandem with observations of the iodine staining. For endocytoscopic observation, we sprayed 1% methylene blue or toluidine blue as a vital dye on the surface of the esophageal mucosa, allowing 15-20 s for sufficient staining. One endoscopist observed the target lesions and decided their endocytoscopic type classification. Histological diagnoses were made by two pathologists who were unaware of the endoscopic findings. We then compared the endocytoscopic diagnosis and conventional histological diagnosis. In an in vivo investigation, we examined 71 lesions of esophageal squamous cell carcinoma. Two endoscopists diagnosed the type classification in consultation with a pathologist with regard to 'nuclear density,''nuclear abnormality,' and 'whether biopsy histology could have been omitted on the basis of endocytoscopic findings.' For the in vivo observation, we utilized XEC120U (higher magnification type [x1100]), XEC300F (lower magnification type [x450]), and XGIF-Q260EC1 (lower magnification type [x450]) instruments. In the basic investigation, among the 11 areas classified as Type 1, 10 (91%) were category 1 by the Vienna classification. Among the 39 lesions classified as Type 3, 36 (92%) were category 4 or 5. The sensitivity of endocytoscopy for malignant lesions (Vienna classification categories 4 and 5) was 94.7%, if Type 3 was considered malignant. The specificity was 84.2% according to the same criteria. In the in vivo observation, two endoscopists diagnosed more than 90% of esophageal squamous cell carcinomas as neoplasms using each type of endocytoscope. With regard to nuclear density, the pathologist considered it to be increased in 98% of cases with the XEC120U, in 94% with the XEC300F, and in 93% with the XGIF-Q260EC1. With regard to nuclear abnormality, the positivity rate was 90% with the XEC120U, 78% with the XEC300F, and 80% with the XGIF-Q260EC1. As to whether or not biopsy histology examination was considered necessary, the pathologist made a 'Yes' judgment for 84% of cases observed with the XEC120U, 66% with the XEC300F, and 67% with the XGIF-Q260EC1. Cancerous lesions diagnosed as Type 3 by both endoscopists using the XEC120U accounted for 46 (90.2%) of the 51 cases. Among these 46 cases, biopsy histology was considered unnecessary by the pathologist in 43 (93.5%). We believe that endocytoscopic observation has the potential to reduce the extent of histologic examination of biopsy specimens in cases corresponding to Types 1 and 3 of our classification.
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Affiliation(s)
- Y Kumagai
- Department of Surgery, Ohta Nishinouchi Hospital, Fukushima 963-8558, Japan.
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Smith SB, Kawachi H, Choi CB, Choi CW, Wu G, Sawyer JE. Cellular regulation of bovine intramuscular adipose tissue development and composition. J Anim Sci 2008; 87:E72-82. [PMID: 18997081 DOI: 10.2527/jas.2008-1340] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It is well documented that grain feeding stimulates adipogenesis in beef cattle, whereas pasture feeding depresses the development of adipose tissues, including intramuscular (i.m.) adipose tissue. Additionally, production practices that depress adipocyte differentiation also limit the synthesis of MUFA. Marbling scores and MUFA increase in parallel suggesting that stearoyl-coenzyme A desaturase (SCD) gene expression is closely associated with and necessary for marbling adipocyte differentiation. Similarly, marbling scores and fatty acid indices of SCD activity are depressed in response to dietary vitamin A restriction. In bovine preadipocytes, vitamins A and D both decrease glycerol-3-phosphate dehydrogenase (GPDH) activity, an index of adipocyte differentiation, whereas incubation of bovine preadipocytes with l-ascorbic acid-2-phosphate increases GPDH activity. Exposing bovine preadipocytes to zinc also stimulates adipogenesis, putatively by inhibiting nitric oxide (NO) production. However, incubation of bovine preadipocytes with arginine, a biological precursor of NO, strongly promotes differentiation in concert with increased SCD expression. This suggests that the effect of either arginine or zinc on adipogenesis is independent of NO synthesis in bovine preadipocytes. Enhanced expression of SCD is associated with a greater accumulation of MUFA both in bovine preadipocyte cultures and during development in growing steers. In bovine preadipocytes, trans-10, cis-12 CLA strongly depresses adipocyte differentiation and SCD gene expression, thereby reducing MUFA concentrations. The bovine preadipocyte culture studies suggest that any production practice that elevates vitamins A or D or trans-10, cis-12 CLA in bovine adipose tissue will reduce i.m. adipose tissue development. Conversely, supplementation with vitamin C or zinc may promote the development of i.m. adipose tissue.
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Affiliation(s)
- S B Smith
- Department of Animal Science, Texas A&M University, College Station, TX 77843-2471, USA.
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Yang SH, Kawachi H, Khan MA, Lee SY, Kim HS, Ha JK, Lee WS, Lee HJ, Ki KS, Kim SB, Sakaguchi S, Maruyama S, Yano H. Development of Bovine Specific Leptin Radioimmunoassay and Relationship of Plasma Leptin with Vitamin A and Age of Wagyu. Asian Australas J Anim Sci 2008. [DOI: 10.5713/ajas.2008.80317] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kawano T, Haruki S, Ogiya K, Kawada K, Nakajima Y, Nishikage T, Kojima K, Nagai K, Kawachi H. Reliability of endoscopic esophageal mucosectomy using TxHood, a multipurpose treatment hood. Surg Endosc 2008; 22:2466-9. [PMID: 18270776 DOI: 10.1007/s00464-008-9742-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 08/27/2007] [Accepted: 11/28/2007] [Indexed: 12/15/2022]
Abstract
Endoscopic mucosectomy, comprising both endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD), is a minimally invasive treatment for patients with early esophageal carcinoma. The use of ESD is appropriate for mucosal lesions of any size. However, ESD techniques are relatively difficult and can lead to serious complications such as perforation and massive bleeding, which have been reported more frequently after ESD than after EMR. This study describes a novel technique for ESD using a newly designed multipurpose treatment hood (TxHood) as well as basic experiments to ensure its safety. The TxHood includes various therapeutic tools such as an electric needleknife, a snare wire, and an injection needle, and the lines can be selected freely before insertion of an enodoscope covered by a TxHood. The main techniques for ESD are endoscopic submucosal saline injections on demand through a working channel of the endoscope or TxHood and a cut or swing cut with a needleknife attached to the TxHood. Moreover, the target area can be grasped with a grasping forceps through a working channel of the endoscope to obtain effective countertraction. In these experiments, an electric needleknife set parallel to the shaft of the endoscope offered safety and ease of handling for the dissecting procedures. Altogether, 16 resections of mucosa with an average size of 3.5 x 2.5 cm (range, 2 x 2 to 7 x 4 cm) were performed. The average time required for each targeted endoscopic resection area was about 15 min. No perforations or instances of uncontrollable bleeding occurred. In conclusion, this basic study demonstrates that the new ESD technique with the TxHood provides a useful treatment for early esophageal carcinoma and may be applicable for all mucosal or submucosal tumors in the gastrointestinal tract.
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Affiliation(s)
- T Kawano
- Department of Surgery, Tokyo Medical and Dental University Hospital, Yushima 1-5-45, Bunkyo-ku, Tokyo, 113-8519, Japan.
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Zhu J, Sun N, Aoudjit L, Li H, Kawachi H, Lemay S, Takano T. Nephrin mediates actin reorganization via phosphoinositide 3-kinase in podocytes. Kidney Int 2007; 73:556-66. [PMID: 18033240 DOI: 10.1038/sj.ki.5002691] [Citation(s) in RCA: 150] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nephrin is a slit diaphragm protein critical for structural and functional integrity of visceral glomerular epithelial cells (podocytes) and is known to be tyrosine phosphorylated by Src family kinases. We studied the role of phosphoinositide 3-kinase (PI3K), activated via the phosphorylation of nephrin, in actin cytoskeletal reorganization of cultured rat podocytes. Phosphorylation of rat nephrin by the Fyn kinase markedly increased its interaction with a regulatory subunit of PI3K. Stable transfection of rat nephrin in the podocytes with podocin led to nephrin tyrosine phosphorylation, PI3K-dependent phosphorylation of Akt, increased Rac1 activity, and an altered actin cytoskeleton with decreased stress fibers and increased lamellipodia. These changes were reversed with an inhibitor of PI3K and not seen when the nephrin-mutant Y1152F replaced wild-type nephrin. Rac1 and Akt1 contributed to lamellipodia formation and decreased stress fibers, respectively. Finally, in the rat model of puromycin aminonucleoside nephrosis, nephrin tyrosine phosphorylation, nephrin-PI3K association, and glomerular Akt phosphorylation were all decreased. Our results suggest that PI3K is involved in nephrin-mediated actin reorganization in podocytes. Disturbed nephrin-PI3K interactions may contribute to abnormal podocyte morphology and proteinuria.
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Affiliation(s)
- J Zhu
- Department of Medicine, McGill University, Montreal, Quebec, Canada
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Hashimoto T, Karasawa T, Saito A, Miyauchi N, Han GD, Hayasaka K, Shimizu F, Kawachi H. Ephrin-B1 localizes at the slit diaphragm of the glomerular podocyte. Kidney Int 2007; 72:954-64. [PMID: 17667985 DOI: 10.1038/sj.ki.5002454] [Citation(s) in RCA: 50] [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: 11/08/2022]
Abstract
Ephs and ephrins are a family of membrane-bound proteins that function as receptor-ligand pairs. Members of the Eph-ephrin-B family have recently been reported to regulate the paracellular permeability of epithelial cells. In this study, we analyzed the expression and the function of ephrin-B1 in glomeruli. Using immunofluorescence (IF), we found that ephrin-B1 was expressed along the glomerular capillary loop. Immunoelectron microscopy revealed that ephrin-B1 expression was restricted at the slit diaphragm. Dual labeled IF showed ephrin-B1 colocalized with the slit diaphragm proteins nephrin and CD2-associated protein. Ephrin-B1 colocalized with nephrin at the late capillary loop stage of kidney development. Additionally, injection of rats with a nephritogenic anti-nephrin antibody (ANA) reduced ephrin-B1 expression. When podocytes were cultured in vitro, they extruded processes that co-stained for ephrin-B1 and for CD2-associated protein. When these podocytes were treated in culture with small interfering RNA for ephrin-B1, CD2-associated protein was reduced in the processes, with a remaining faint perinuclear staining. We suggest that ephrin-B1 has a role in maintaining barrier function at the slit diaphragm.
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Affiliation(s)
- T Hashimoto
- Department of Cell Biology, Institute of Nephrology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Eto N, Wada T, Inagi R, Takano H, Shimizu A, Kato H, Kurihara H, Kawachi H, Shankland SJ, Fujita T, Nangaku M. Podocyte protection by darbepoetin: preservation of the cytoskeleton and nephrin expression. Kidney Int 2007; 72:455-63. [PMID: 17457371 DOI: 10.1038/sj.ki.5002311] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Podocyte injury is a significant contributor to proteinuria and glomerulosclerosis. Recent studies have shown a renoprotective effect of erythropoietin (EPO) during ischemic kidney disease. In this study, we examine mechanisms by which a long acting recombinant EPO analog, darbepoetin, may confer renoprotection in the puromycin aminonucleoside-induced model of nephrotic syndrome. Darbepoetin decreased the proteinuria of rats treated with puromycin. This protective effect was correlated with the immunohistochemical disappearance of the podocyte injury markers desmin and the immune costimulator molecule B7.1 with the reappearance of nephrin expression in the slit diaphragm. Podocyte foot process retraction and effacement along with actin filament rearrangement, determined by electron microscopy, were all reversed by darbepoetin treatment. The protective effects were confirmed in puromycin-induced nephrotic rats that had been hemodiluted to normal hematocrit levels. Furthermore, puromycin treatment of rat podocytes in culture caused actin cytoskeletal reorganization along with deranged nephrin distribution. All these effects in vitro were reversed by darbepoetin. Our study demonstrates that darbepoetin treatment ameliorates podocyte injury and decreases proteinuria by a direct effect on podocytes. This may be accomplished by maintenance of the actin cytoskeleton and nephrin expression.
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Affiliation(s)
- N Eto
- Division of Nephrology and Endocrinology, University of Tokyo School of Medicine, Tokyo, Japan
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Chung KY, Lunt DK, Kawachi H, Yano H, Smith SB. Lipogenesis and stearoyl-CoA desaturase gene expression and enzyme activity in adipose tissue of short- and long-fed Angus and Wagyu steers fed corn- or hay-based diets. J Anim Sci 2007; 85:380-7. [PMID: 17235023 DOI: 10.2527/jas.2006-087] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [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: 11/13/2022] Open
Abstract
Angus and Wagyu steers consuming high-roughage diets exhibit large differences in adipose tissue fatty acid composition, but there are no differences in terminal measures of stearoyl-CoA desaturase (SCD) activity or gene expression. Also, adipose tissue lipids of cattle fed corn-based diets have greater MUFA:SFA ratios than cattle fed hay-based diets. We hypothesized that any changes in SCD gene expression and activity would precede similar changes in adipose tissue lipogenesis between short- and long-fed endpoints. Furthermore, changes in SCD activity and gene expression between production endpoints would differ between corn- and hay-fed steers and between Wagyu and Angus steers. Angus (n = 8) and Wagyu (n = 8) steers were fed a corn-based diet for 8 mo (short-fed; 16 mo of age) or 16 mo (long-fed; 24 mo of age), whereas another group of Angus (n = 8) and Wagyu (n = 8) steers was fed a hay-based diet for 12 mo (short-fed; 20 mo of age) or 20 mo (long-fed; 28 mo of age) to match the end point BW of the corn-fed steers. Acetate incorporation into lipids in vitro was greater (P < 0.01) in corn-fed steers than in hay-fed steers and tended (P = 0.06) to be greater in Wagyu than in Angus s.c. adipose tissue because the rate in Wagyu was twice that of Angus adipose tissue in the corn-fed, short-fed steers. There were diet x end point interactions for lipogenesis in i.m. and s.c. adipose tissues (both P < 0.01) because lipogenesis was 60 to 90% lower in the long-fed cattle than in short-fed cattle fed the corn-based diet. The greatest SCD enzyme activity in Angus s.c. adipose tissue was observed at 24 mo of age (corn-based diet), but activity in Wagyu adipose tissue was greatest at 28 mo of age (hay-based diet; breed x diet x end point interaction, P = 0.08). For short- vs. long-fed endpoints in Angus, s.c. adipose tissue SCD activity was less (hay diet) or the same (corn diet). Conversely, SCD gene expression was greatest in long-fed Wagyu steers fed the hay- or corn-based diets (breed x end point interaction; P < 0.01). Contrary to our hypotheses, SCD activity increased over time, whereas lipogenesis from acetate decreased. However, the developmental pattern of SCD gene expression and activity differed markedly between hay-fed Angus and Wagyu adipose tissues, which may explain the differences in the MUFA:SFA ratios observed in adipose tissues from these cattle.
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Affiliation(s)
- K Y Chung
- Department of Animal Science, Texas A&M University, College Station, TX 77843, USA
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Hara A, Wada T, Furuichi K, Sakai N, Kawachi H, Shimizu F, Shibuya M, Matsushima K, Yokoyama H, Egashira K, Kaneko S. Blockade of VEGF accelerates proteinuria, via decrease in nephrin expression in rat crescentic glomerulonephritis. Kidney Int 2006; 69:1986-95. [PMID: 16641924 DOI: 10.1038/sj.ki.5000439] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Vascular endothelial growth factor (VEGF) is a potent angiogenic factor that maintains the glomerular and peritubular capillary (PTC) network in the kidney. The soluble form of the VEGF receptor-1 (soluble fms-like tyrosine kinase 1 (sFlt-1)) is known to regulate VEGF activity by binding VEGF in the circulation. We hypothesized that VEGF may be beneficial for maintaining glomerular filtration barrier and vascular network in rats with progressive glomerulonephritis (GN). For blockade of VEGF activity in vivo, rats were transfected twice with plasmid DNA encoding the murine sFlt-1 gene into femoral muscle 3 days before and 2 weeks after the induction of antiglomerular basement membrane antibody-induced GN. Inhibition of VEGF with sFlt-1 resulted in massive urinary protein excretion, concomitantly with downregulated expression of nephrin in nephritic rats. Further, blockade of VEGF induced mild proteinuria in normal rats. Administration of sFlt-1 affected neither the infiltration of macrophages nor crescentic formation. In contrast, treatment of sFlt-1 accelerated the progression of glomerulosclerosis and interstitial fibrosis accompanied with renal dysfunction and PTC loss at day 56. VEGF may play a role in maintaining the podocyte function as well as renal vasculature, thereby protecting glomeruli and interstitium from progressive renal insults.
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Affiliation(s)
- A Hara
- Department of Gastroenterology and Nephrology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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Tsubata Y, Sakatsume M, Ogawa A, Alchi B, Kaneko Y, Kuroda T, Kawachi H, Narita I, Yamamoto T, Gejyo F. Expression of allograft inflammatory factor-1 in kidneys: A novel molecular component of podocyte. Kidney Int 2006; 70:1948-54. [PMID: 17035944 DOI: 10.1038/sj.ki.5001941] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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: 11/08/2022]
Abstract
Our comprehensive gene expression profiles of the kidneys in an anti-glomerular basement membrane (GBM) nephritis model using DNA arrays revealed that allograft inflammatory factor-1 (AIF-1) was one of the highly expressed genes. Here, we explored the pathological significance of AIF-1 expression in the kidneys. The expression pattern of AIF-1 mRNA and protein in the kidneys of normal and diseased rats, such as anti-GBM nephritis and puromycin aminonucleoside nephrosis, was investigated by in situ hybridization, immunohistochemistry, and immunoelectron microscopy. Furthermore, the expression of AIF-1 in human kidneys and urinary sediments was examined. AIF-1 was expressed at both mRNA and protein levels in podocytes of normal and diseased rats, and in infiltrating cells in anti-GBM nephritis kidneys. The expression of AIF-1 in podocytes was constitutive; positive in podocytes of both normal and diseased rats. In humans, AIF-1 was expressed in podocytes and infiltrating inflammatory cells, similarly. Moreover, it was detected in urinary podocytes from patients with immunoglobulin A nephropathy. These data document for the first time that AIF-1, a constitutively expressed protein in rat and human podocytes, is a novel molecular component of podocytes, and that the upregulation of AIF-1 in an anti-GBM nephritis model may mainly be a consequence of its expression in infiltrating cells.
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Affiliation(s)
- Y Tsubata
- Department of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Mizui M, Isaka Y, Takabatake Y, Sato Y, Kawachi H, Shimizu F, Takahara S, Ito T, Imai E. Transcription factor Ets-1 is essential for mesangial matrix remodeling. Kidney Int 2006; 70:298-305. [PMID: 16738537 DOI: 10.1038/sj.ki.5001541] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Most advanced glomerular diseases are characterized by abnormal extracellular matrix (ECM) accumulation in the glomeruli, and matrix metalloproteinases (MMPs) play a pivotal role in ECM remodeling in various glomerular diseases. The proto-oncogene, ets-1, is a transcription factor regulating the expression of various matrix proteinases, including MMP-1, MMP-3, and MMP-9. The goal of the present study was to characterize the role of Ets-1 in the progression of glomerular diseases. Overexpression of Ets-1 in cultured mesangial cells prevented transforming growth factor (TGF)-beta-induced inhibition of DNA-binding activity and TGF-beta-induced type I collagen production. In addition, exogenous Ets-1 abolished TGF-beta-induced collagen gel contraction. The in vivo transfection of the ets-1 gene into nephritic kidney resulted in the increases in glomerular MMP-1, MMP-3, and MMP-9 mRNA, decreases in mesangial ECM deposition, and attenuation of fibronectin extradomain A (EDA) and type I collagen expression. In contrast, knockdown of Ets-1 in glomeruli resulted in severe ECM deposition in diseased glomeruli. In conclusion, Ets-1 promotes degradation of ECM proteins and is critical for integral glomerular reorganization.
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Affiliation(s)
- M Mizui
- Department of Nephrology, Osaka University Graduate School of Medicine (A8), Suita, Japan
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Tsuji M, Monkawa T, Yoshino J, Asai M, Fukuda S, Kawachi H, Shimizu F, Hayashi M, Saruta T. Microarray analysis of a reversible model and an irreversible model of anti-Thy-1 nephritis. Kidney Int 2006; 69:996-1004. [PMID: 16528249 DOI: 10.1038/sj.ki.5000191] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 11/09/2022]
Abstract
A single intravenous injection of anti-Thy-1 monoclonal antibody (mAb) 1-22-3 is known to cause reversible mesangial proliferative glomerulonephritis. However, mAb 1-22-3 injection followed by unilateral nephrectomy leads to progressive glomerulosclerosis and tubulointerstitial change with an irreversible course. To identify genes that play an important role in the irreversible progression of renal injury, we used microarray technology to identify differences in gene expression between these models. Rats were intravenously injected with mAb 1-22-3 1 week after unilateral nephrectomy (irreversible model) or a sham operation (reversible model), and rats were killed on days 4, 7, 14, 42, and 56 after the injection. complementary DNA probes prepared from kidney messenger RNAs were hybridized with oligonucleotide microarrays containing 4854 rat genes. The microarray identified 189 differentially expressed genes, having at least a two-fold difference in expression level between the two models, and they were classified into five clusters. One of the clusters consisted of genes whose expression was markedly upregulated in the irreversible model. This cluster included the genes encoding osteopontin, kidney injury molecule-1, and thymosin beta10. Increased expression of thymosin beta10 was localized mainly in macrophages in the fibrotic interstitium, and upregulation of thymosin beta10 expression was also observed in a unilateral ureteral obstruction model. The microarray analysis yielded information on the molecular mechanisms responsible for the difference in disease progression between the reversible and irreversible model of anti-Thy-1 nephritis. Thymosin beta10 may play an important role in the progression of kidney disease.
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Affiliation(s)
- M Tsuji
- Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
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Takabatake Y, Isaka Y, Mizui M, Kawachi H, Shimizu F, Ito T, Hori M, Imai E. Exploring RNA interference as a therapeutic strategy for renal disease. Gene Ther 2005; 12:965-73. [PMID: 15729369 DOI: 10.1038/sj.gt.3302480] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [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: 01/21/2023]
Abstract
The short synthetic interfering RNA duplexes (siRNAs) can selectively suppress gene expression in somatic mammalian cells without nonselective toxic effects of double-stranded RNA (dsRNA). However, a selective in vivo delivery of siRNA transfer has not been reported in kidney. Here, we investigated whether injection of synthetic siRNAs via renal artery followed by electroporation could be effective and therapeutic in silencing specific gene in glomerulus. We investigated the effect of siRNA in rat cultured mesangial cells (MCs) and showed that siRNA sequence-specific suppression of transgene expression was over a 1000-fold more potent than that by antisense oligodeoxynucleotide (ASODN). Transfection of siRNA targeting luciferase into rat kidneys significantly inhibited expression of a cotransfected luciferase expression vector in vivo. The delivery of siRNA targeting enhanced green fluorescent protein (EGFP) in the transgenic 'green' rat reduced endogenous EGFP expression, mainly in glomerular MCs. Furthermore, RNAi targeting against TGF-beta1 significantly suppressed TGF-beta1 mRNA and protein expression, thereby ameliorated the progression of matrix expansion in experimental glomerulonephritis. In addition, vector-based RNAi also inhibited TGF-beta1 expression in vitro and in vivo. In conclusion, siRNA-directed TGF-beta1 silencing may be of therapeutic value in the prevention and treatment of fibrotic diseases.
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Affiliation(s)
- Y Takabatake
- Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine (A8), Suita, Japan
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Peters H, Kron S, Wang Y, Martini S, Kawachi H, Shimizu F, Loof T, Kraemer S, Neumayer H. M.618 Rosuvastatin slows the progressive course of chronic anti-thy1-induced glomerulosclerosis of the rat. ATHEROSCLEROSIS SUPP 2004. [DOI: 10.1016/s1567-5688(04)90616-8] [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: 11/27/2022]
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Davis BJ, Forbes JM, Thomas MC, Jerums G, Burns WC, Kawachi H, Allen TJ, Cooper ME. Superior renoprotective effects of combination therapy with ACE and AGE inhibition in the diabetic spontaneously hypertensive rat. Diabetologia 2004; 47:89-97. [PMID: 14647892 DOI: 10.1007/s00125-003-1256-8] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2003] [Revised: 09/02/2003] [Indexed: 11/30/2022]
Abstract
AIMS/HYPOTHESIS Diabetic renal disease has been postulated to progress as a result of an interaction between metabolic and haemodynamic pathways. Our aim was to assess the functional, structural, molecular and cellular aspects of renal disease in an experimental model of diabetes with associated hypertension. METHOD Streptozotocin-induced diabetic spontaneously hypertensive rats were randomised to no treatment, the ACE inhibitor, perindopril (2 mg/l), the AGE formation inhibitor, aminoguanidine (1 g/l) and a combination of both agents and were followed for 32 weeks. RESULTS Diabetes was associated with a considerable increase in albumin excretion rate. Both aminoguanidine and perindopril retarded the increase in albuminuria, which was completely abrogated by combination therapy. Glomerulosclerosis and tubulointerstitial damage was reduced by both monotherapies with further renoprotection afforded by combination therapy in both cases. Combination therapy was also associated with a superior restoration in diabetes-induced nephrin protein depletion compared to either monotherapy. TGFbeta1 expression as assessed by in situ hybridisation was increased in the diabetic rats and reduced by perindopril and aminoguanidine. CONCLUSION/INTERPRETATION These findings indicate that in the context of diabetes-related renal injury, blocking both the renin-angiotensin and advanced glycation pathways offers superior renoprotection and could be considered as a therapeutic strategy in the prevention and retardation of progressive-diabetic renal injury.
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Affiliation(s)
- B J Davis
- Diabetic Complications Group, Baker Heart Research Institute, P.O. Box 6492, Prahran, Melbourne, Victoria 8008, Australia.
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Higuchi N, Maruyama H, Kuroda T, Kameda S, Iino N, Kawachi H, Nishikawa Y, Hanawa H, Tahara H, Miyazaki J, Gejyo F. Hydrodynamics-based delivery of the viral interleukin-10 gene suppresses experimental crescentic glomerulonephritis in Wistar-Kyoto rats. Gene Ther 2003; 10:1297-310. [PMID: 12883526 DOI: 10.1038/sj.gt.3301988] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Gene therapy is expected to revolutionize the treatment of kidney diseases. Viral interleukin (vIL)-10 has a variety of immunomodulatory properties. We examined the applicability of vIL-10 gene transfer to the treatment of rats with crescentic glomerulonephritis, a T helper 1 (Th 1) predominant disease. To produce the disease, Wistar-Kyoto rats were injected with a rabbit polyclonal anti-rat glomerular basement membrane antibody. After 3 h, a large volume of plasmid DNA expressing vIL-10 (pCAGGS-vIL-10) solution was rapidly injected into the tail vein. pCAGGS solution was similarly injected into control rats (pCAGGS rats). We confirmed the presence of vector-derived vIL-10 mainly in the liver and observed high serum vIL-10 levels in pCAGGS-vIL-10-injected rats. Compared with the pCAGGS rats, the pCAGGS-vIL-10 rats showed significant therapeutic effects: reduced frequency of crescent formation, decrease in the number of total cells, macrophages, and CD4+ T cells in the glomeruli, decrease in urine protein, and attenuation of kidney dysfunction. Using quantitative real-time polymerase chain reaction, we also observed that this model was Th1-predominant in the glomeruli and that the ratio of the transcripts of CD4, interferon-gamma, tumor necrosis factor-alpha, and monocyte chemotactic protein-1 to the transcripts of glucose-6-phosphate dehydrogenase in the glomeruli were all significantly lower in the pCAGGS-vIL-10 rats than in the pCAGGS rats. These results demonstrate that pCAGGS-vIL-10 gene transfer by hydrodynamics-based transfection suppresses crescentic glomerulonephritis.
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Affiliation(s)
- N Higuchi
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Oyanagi A, Orikasa M, Kawachi H, Ito Y, Koike H, Gejo F, Shimizu F. Crescent-forming mechanism in an irreversible Thy-1 model in rats. Nephron Clin Pract 2001; 89:439-47. [PMID: 11721163 DOI: 10.1159/000046117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The crescent-forming mechanism has not yet been fully clarified and a cell which constitutes a crescent still remains controversial. This study was undertaken to analyze the crescent-forming mechanism in an irreversible Thy-1 model by applying a new marker-recognizing monoclonal antibody (mAb) OS-3. METHODS An irreversible Thy-1 model was induced by an intravenous injection of 500 microg of anti-Thy-1 mAb 1-22-3 to unilaterally nephrectomized Wistar rats. Seven rats were sacrificed 3, 7 and 14 days after the mAb injection respectively and the renal tissues were examined histologically and immunohistochemically. RESULTS Inflammatory cells were demonstrated mostly in the interstitium, but they were located within advanced cellular crescents in later stages. OS-3, which stained parietal glomerular epithelial cell (PGEC) only partly in a normal rat kidney section, reacted to PGEC more extensively at day 3 and also with cellular crescents at day 7. During the course of this model the podocytes lost their characteristic to be stained by anti-podocalyxcin Ab and obtained a new marker of a diseased state, i.e. to be positively stained by OS-3. CONCLUSION Glomerular epithelial cells, but not inflammatory cells, are suggested to directly participate in the crescent formation in early stages, and podocytes with phenotypic changes might be partly involved in the formation of the crescents.
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Affiliation(s)
- A Oyanagi
- Department of Cell Biology, Institute of Nephrology, Niigata University School of Medicine, Niigata, Japan
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Abstract
BACKGROUND From the observations of morphology seen in early phases of the experimental models of the irreversible mesangial proliferative glomerulonephritis, we hypothesized that podocyte injury is one of the important factors in bringing upon irreversible glomerular alterations. To verify this hypothesis, we investigated whether podocyte injury induced by puromycin aminonucleoside (PAN) injection affects the mesangial alterations of anti-Thy 1.1 glomerulonephritis. METHODS Female Wistar rats were injected with 0.5 mg monoclonal antibody (mAb) 1-22-3 five days after the injection of 10 mg or 5 mg/100 g body weight (BW) of puromycin aminonucleoside (PAN), and sacrificed at 7 days or 8 weeks after the mAb 1-22-3 injection. RESULTS Consecutive injections of 10 mg/100 g BW of PAN and mAb 1-22-3 caused the irreversible mesangial alteration with persistent proteinuria (at week 8, proteinuria 100.3 +/- 57.8 mg/24 h, matrix score 1.13 +/- 0.52, collagen type I score 2.04 +/- 0.53, mRNA for collagen type I 227 +/- 79% to the group with a single injection of 1-22-3). Although single injection of 5 mg/100 g BW of PAN was not capable of inducing abnormal proteinuria, consecutive injections of 5 mg/100 g BW of PAN and mAb 1-22-3 also caused irreversible mesangial alteration and persistent proteinuria. CONCLUSIONS Podocyte injury might be an important factor that exacerbates mesangial proliferation and mesangial matrix expansion. The irreversible mesangial alterations caused by consecutive injections of PAN and mAb 1-22-3 may be a novel model that could be used to analyze the mechanism of progressive mesangial alteration.
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Affiliation(s)
- Y Morioka
- Department of Cell Biology, Institute of Nephrology, Faculty of Medicine, Niigata University, Japan
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43
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Schaier M, Lehrke I, Schade K, Morath C, Shimizu F, Kawachi H, Grone HJ, Ritz E, Wagner J. Isotretinoin alleviates renal damage in rat chronic glomerulonephritis. Kidney Int 2001; 60:2222-34. [PMID: 11737596 DOI: 10.1046/j.1523-1755.2001.00056.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Retinoids, derivatives of vitamin A, have strong anti-inflammatory and antiproliferative properties. We previously demonstrated that the pan-agonists all-transretinoic acid (RA) and isotretinoin (13-cis RA) alleviate renal damage in rat acute glomerulonephritis (GN) induced by anti-Thy-1.1 mAb OX-7. METHODS The present study examined the effects of low dose and high dose treatment with isotretinoin in the chronic glomerulonephritis model, Thy-GN. Thy-GN was induced by a single intravenous injection of monoclonal antibody (mAb) 1-22-3 in uninephrectomized Wistar rats (N = 7 to 10 per group). Control and nephritic groups were treated with vehicle (veh), low dose isotretinoin (2 mg/kg body wt), or high dose isotretinoin (10 mg/kg body wt). The experiment was terminated 60 days after induction of Thy-GN. RESULTS In animals with Thy-GN, isotretinoin abrogated the increase in blood pressure and significantly reduced albuminuria. Glomerulosclerosis index, glomerular and interstitial cell counts, as well as the area of the interstitial space were significantly lower in nephritic rats treated with low and high dose isotretinoin compared to vehicle-treated nephritic controls. Treatment with isotretinoin also significantly reduced the number of glomerular and interstitial macrophages. The increase of transforming growth factor (TGF)-beta1, TGF receptor II and prepro-endothelin-1 gene expression in vehicle-treated nephritic rats was significantly attenuated by isotretinoin. CONCLUSIONS Treatment with isotretinoin significantly reduces glomerular and interstitial damage in rats with chronic glomerulonephritis as indicated by different functional and histological markers. Retinoids may provide a novel therapeutic option for the treatment of glomerulonephritis.
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Affiliation(s)
- M Schaier
- Department of Nephrology, University of Heidelberg, Heidelberg, Germany
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Kasuga H, Ito Y, Sakamoto S, Kawachi H, Shimizu F, Yuzawa Y, Matsuo S. Effects of anti-TGF-beta type II receptor antibody on experimental glomerulonephritis. Kidney Int 2001; 60:1745-55. [PMID: 11703592 DOI: 10.1046/j.1523-1755.2001.00990.x] [Citation(s) in RCA: 45] [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: 11/20/2022]
Abstract
BACKGROUND Renal fibrosis, characterized by the accumulation of extracellular matrix (ECM), is a common histopathological feature of progressive renal disease of diverse etiology. Interaction between transforming growth factor-beta (TGF-beta) and TGF-beta type II receptor (TGF-betaIIR) may play an important role in the ongoing fibrotic process. TGF-betaIIR and TGF-beta have been reported to be up-regulated in human glomerulopathies. In order to block the TGF-beta system, many studies have inhibited TGF-beta itself, but not its receptors. Our study explored the effects of fully human monoclonal antibody against TGF-betaIIR (hTGF-betaIIRAb) on experimental proliferative glomerulonephritis. METHODS hTGF-betaIIRAb was generated from Xenomice. The expression of TGF-betaIIR was studied by immunohistochemistry in normal and anti-Thy-1 nephritis rats. hTGF-betaIIRAb or control Ab was injected intraperitoneally at day 0 and day 4 of anti-Thy-1 nephritis, and rats were sacrificed at day 7. Effects of hTGF-betaIIRAb were assessed by histological and immunopathological measurements. RESULTS The specificity of hTGF-betaIIRAb was confirmed by ELISA and Western blot analysis. By immunostaining, TGF-betaIIR expression was up-regulated in the proliferative lesions of anti-Thy-1 nephritis at day 7. In the hTGF-betaIIRAb-treated group, the extent of mesangial expansion was less than that in the control group. By immunohistology, alpha-smooth muscle actin, fibronectin-EDA, and type I collagen were significantly reduced in the hTGF-betaIIRAb-treated group. CONCLUSIONS Anti-TGF-betaIIR antibody ameliorated ECM accumulation in anti-Thy-1 nephritis. Our data suggest that TGF-betaIIR may be one of the therapeutic targets, and that fully human monoclonal antibody against TGF-betaIIR may have a new therapeutic potential for renal fibrosis.
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Affiliation(s)
- H Kasuga
- Division of Nephrology, Internal Medicine III, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Aichi, Japan
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Ishii I, Tomizawa A, Kawachi H, Suzuki T, Kotani A, Koshushi I, Itoh H, Morisaki N, Bujo H, Saito Y, Ohmori S, Kitada M. Histological and functional analysis of vascular smooth muscle cells in a novel culture system with honeycomb-like structure. Atherosclerosis 2001; 158:377-84. [PMID: 11583716 DOI: 10.1016/s0021-9150(01)00461-0] [Citation(s) in RCA: 24] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Vascular smooth muscle cells (SMCs) undergo phenotype change with the development of atherosclerosis. The phenotype changes of SMCs have been observed in various culture conditions, such as collagen-coated dishes. Here, we report the morphological and functional features of SMCs in a novel culture system using type I-collagen in a characteristic three-dimensional structure designated as honeycombs. The number of ribosome and mitochondria in SMCs cultured in honeycombs was one half or third of those cultured on collagen-coated plastic plates. DNA and protein synthesis of SMCs cultured in honeycombs were less than 1 and 30-40%, respectively, of those cultured on plastic plates. In addition, PDGF-BB did not increase the amount of DNA synthesis in SMCs in honeycombs. SMCs in honeycombs were shown to express several proteins, which are known to express in SMCs in medial layers of arteries. Particularly, caldesmon heavy chain was expressed in SMCs cultured in honeycombs, whereas not in those on plastic plates. Although focal adhesion kinase (FAK) was clearly detected in SMCs in honeycomb, the phosphotyrosine content of focal adhesion kin ase decreased in the process of culture. Immunoblot analysis showed dear different expression of ERK1 and ERK2 of mitogen-activated protein kinase in SMCs. SMCs in honeycombs expressed ERK2, more abundantly compared to ERK1, whereas SMCs in plates show the same levels of expressions for both proteins. Thus, the histological and functional feature of SMCs in the novel culture system is different from SMCs in plastic plates. The three-dimensional culture system described here may be indicating that cultured SMCs are able to express different proteins responding to the surrounding structures.
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Affiliation(s)
- I Ishii
- Faculty of Pharmaceutical Sciences, Chiba University, 1-33, Yayoi-cho, Inageku, Chiba 263-8522, Japan.
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Abstract
The aim of this study was to evaluate whether the infiltrating T-lymphocyte can be a predictor in the disease progression of IgA nephropathy (IgAN). Twenty children with IgAN, followed for more than 5 years, were divided into progressive (n=5) and non-progressive groups (n=15). We assessed glomerular and interstitial infiltration of T-lymphocytes (CD4+ and CD8+ cells) and expression of alpha-smooth muscle actin (alpha-SMA) and transforming growth factor-beta (TGF-beta) using an indirect immunofluorescence method on the renal biopsies. We analyzed their relationship to the degree of proteinuria, histological changes, and prognosis. The number of CD8+ cells in glomeruli and in interstitium was higher in the progressive group than in the non-progressive group. The glomerular alpha-SMA staining was more intensive in the progressive group than in the non-progressive group. Urinary protein and the degree of histological changes were also higher in the progressive group than in the non-progressive group. Among these markers, the number of glomerular CD8+ cells was the most apparent difference between the two groups. In conclusion, these results indicate that the number of glomerular CD8+ cells is the most sensitive predictor of disease progression in childhood IgAN.
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Affiliation(s)
- T Watanabe
- Department of Cell Biology, Institute of Nephrology, Faculty of Medicine, Niigata University, Japan
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Bonnet F, Cooper ME, Kawachi H, Allen TJ, Boner G, Cao Z. Irbesartan normalises the deficiency in glomerular nephrin expression in a model of diabetes and hypertension. Diabetologia 2001; 44:874-7. [PMID: 11508272 DOI: 10.1007/s001250100546] [Citation(s) in RCA: 184] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
AIMS/HYPOTHESIS The location of nephrin has been identified as the slit-diaphragm of the glomerular podocyte. Recent evidence suggests that nephrin could play a key role in the function of the glomerular filtration barrier and the development of proteinuria but its status in long-term diabetes is still not understood. We studied the expression of nephrin in a hypertensive model of diabetic nephropathy and investigated the potential influence of angiotensin II blockade on nephrin gene and protein expression. METHODS Streptozotocin-diabetic spontaneously hypertensive rats were given either no treatment or the angiotensin II antagonist, irbesartan, at a dose of 15 mg/kg per day by gavage for 32 weeks. Non-diabetic spontaneously hypertensive rats were used as a control group. Real time RT-PCR and immunohistochemistry were used to assess and quantify gene and protein expression of nephrin. RESULTS Diabetic spontaneously hypertensive rats developed albuminuria and had a reduction in both gene and protein expression of nephrin when compared with control rats. Irbesartan treatment prevented the development of albuminuria and completely abrogated the down regulation of nephrin in diabetic rats. CONCLUSION/INTERPRETATION Long-term diabetes in spontaneously hypertensive rats is associated with a reduction in both gene and protein expression of nephrin within the kidney. These changes in nephrin levels were completely prevented by angiotensin II antagonist treatment, suggesting a potential novel mechanism to explain the antiproteinuric effect of agents which interrupt the renin-angiotensin system.
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Affiliation(s)
- F Bonnet
- Department of Medicine, University of Melbourne, Austin and Repatriation Medical Centre, Heidelberg West, Victoria, Australia
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Beppu M, Hora M, Watanabe T, Watanabe M, Kawachi H, Mishima E, Makino M, Kikugawa K. Substrate-bound fibronectin enhances scavenger receptor activity of macrophages by calcium signaling. Arch Biochem Biophys 2001; 390:243-52. [PMID: 11396927 DOI: 10.1006/abbi.2001.2381] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have previously found that ability of mouse macrophages to bind and take up oxidized low-density lipoprotein (oxLDL) through scavenger receptors is significantly enhanced when the cells are plated on fibronectin (FN)-coated culture substrates. Here, the mechanisms of the enhancement of the scavenger receptor activity by the substrate-bound FN was investigated using thioglycollate-induced mouse peritoneal macrophages. A Ca(2+) channel blocker diltiazem and a calmodulin inhibitor W-7 reduced the scavenger receptor activity of the macrophages plated on FN-coated substrate to the level of the cells plated on uncoated substrate, as assessed by oxLDL binding, while the scavenger receptor activity of the macrophages on uncoated substrate was little affected. Similarly, FN-induced enhancement of the scavenger receptor activity assessed by oxLDL uptake was selectively inhibited by Ca(2+) channel blockers (diltiazem, nifedipine, verapamil) and calmodulin inhibitors (W-7, trifluoperazine). Intracellular free Ca(2+) level of the macrophages was increased, depending on extracellular Ca(2+), when plated on FN-coated substrate. This increase in the Ca(2+) level was inhibited by diltiazem and RGD-containing peptides present in cell adhesive region of FN. Like the substrate-bound FN, Ca(2+) ionophore A23187 enhanced the scavenger receptor activity of binding and taking up of oxLDL. These results indicate that substrate-bound FN enhances scavenger receptor activity of macrophages by increasing channel-dependent Ca(2+) influx. A microtubule disruptor, colchicine, and an actin filament disruptor, cytochalasin B, inhibited the FN-induced enhancement of the scavenger receptor activity, suggesting that these cytoskeletal structures are required for transmission of the adhesion signal of FN. The number of the scavenger receptors was found to increase by 1.4-fold upon adhesion signal of FN. We suggest that substrate-bound FN increases the number of the macrophage scavenger receptors as a result of induction of Ca(2+) influx and causes increased accumulation of oxLDL within the cells, rendering the cells more susceptible to conversion into foam cells.
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Affiliation(s)
- M Beppu
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
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Kawachi H, Fujikawa A, Maeda N, Noda M. Identification of GIT1/Cat-1 as a substrate molecule of protein tyrosine phosphatase zeta /beta by the yeast substrate-trapping system. Proc Natl Acad Sci U S A 2001; 98:6593-8. [PMID: 11381105 PMCID: PMC34398 DOI: 10.1073/pnas.041608698] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We used a genetic method, the yeast substrate-trapping system, to identify substrates for protein tyrosine phosphatases zeta (PTPzeta/RPTPbeta). This method is based on the yeast two-hybrid system, with two essential modifications: conditional expression of protein tyrosine kinase v-src (active src) to tyrosine-phosphorylate the prey proteins and screening by using a substrate-trap mutant of PTPzeta (PTPzeta-D1902A) as bait. By using this system, several substrate candidates for PTPzeta were isolated. Among them, GIT1/Cat-1 (G protein-coupled receptor kinase-interactor 1/Cool-associated, tyrosine-phosphorylated 1) was examined further. GIT1/Cat-1 bound to PTPzeta-D1902A dependent on the substrate tyrosine phosphorylation. Tyrosine-phosphorylated GIT1/Cat-1 was dephosphorylated by PTPzeta in vitro. Immunoprecipitation experiments indicated that PTPzeta-D1902A and GIT1/Cat-1 form a stable complex also in mammalian cells. Immunohistochemical analyses revealed that PTPzeta and GIT1/Cat-1 were colocalized in the processes of pyramidal cells in the hippocampus and neocortex in rat brain. Subcellular colocalization was further verified in the growth cones of mossy fibers from pontine explants and in the ruffling membranes and processes of B103 neuroblastoma cells. Moreover, pleiotrophin, a ligand for PTPzeta, increased tyrosine phosphorylation of GIT1/Cat-1 in B103 cells. All these results indicate that GIT1/Cat-1 is a substrate molecule of PTPzeta.
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Affiliation(s)
- H Kawachi
- Division of Molecular Neurobiology, National Institute for Basic Biology, Okazaki 444-8585, Japan
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Inoue T, Yaoita E, Kurihara H, Shimizu F, Sakai T, Kobayashi T, Ohshiro K, Kawachi H, Okada H, Suzuki H, Kihara I, Yamamoto T. FAT is a component of glomerular slit diaphragms. Kidney Int 2001; 59:1003-12. [PMID: 11231355 DOI: 10.1046/j.1523-1755.2001.0590031003.x] [Citation(s) in RCA: 151] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Slit diaphragms are intercellular junctions of podocytes of the renal glomerulus. The molecular composition of slit diaphragms is still elusive. Slit diaphragms are characterized by the presence of a wide intercellular space. The morphological feature is shared by desmosomes and adherens junctions, which contain members of the cadherin superfamily. Thus, we have hypothesized that some components of slit diaphragms belong to the cadherin superfamily. Consequently, we have isolated cDNA encoding FAT from reverse-transcribed (RT) glomerular cDNA by homology polymerase chain reaction (PCR) using primers based on conserved sequences in cadherin molecules. FAT is a novel member of the cadherin superfamily with 34 tandem cadherin-like extracellular repeats, and it closely resembles the Drosophila tumor suppressor fat. METHODS Expression of FAT was examined in glomeruli of the adult rat kidney by the ribonuclease protection assay and in situ hybridization. To localize the FAT protein in podocytes minutely, we prepared affinity-purified antibody against FAT by immunizing rabbits against an oligopeptide corresponding to the C-terminal 20 amino acids. RESULTS Expression of FAT mRNA was detected in total RNA from glomeruli. In situ hybridization revealed significant signals in podocytes. Western blot analysis using solubilized glomeruli showed a single band, in which the molecular weight was more than 500 kD. Immunostaining of cultured epithelial cells from rat kidney (NRK52E) revealed FAT accumulation in cell-cell contact sites. In the glomerulus, FAT staining was observed distinctly along glomerular capillary walls. Double-label immunostaining using monoclonal antibody against slit diaphragms (mAb 5-1-6) showed identical localization of anti-FAT antibody and mAb 5-1-6. Furthermore, the double-label immunogold technique with ultrathin cryosections demonstrated that gold particles for FAT cytoplasmic domain were located at the base of slit diaphragms labeled by mAb 5-1-6 and that the cytoplasmic domain of FAT colocalized with ZO-1, a cytoplasmic component associated with slit diaphragms. CONCLUSION The molecular structure of FAT and its colocalization with 5-1-6 antigen and ZO-1 indicate that FAT is a component of slit diaphragms.
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Affiliation(s)
- T Inoue
- Department of Renal Pathology, Institute of Nephrology, Faculty of Medicine, Niigata University, Niigata, Japan
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