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Kobayashi Y, Yatsu K, Haruna A, Kawano R, Ozawa M, Haze T, Komiya S, Suzuki S, Ohki Y, Fujiwara A, Saka S, Hirawa N, Toya Y, Tamura K. ATP2B1 gene polymorphisms associated with resistant hypertension in the Japanese population. J Clin Hypertens (Greenwich) 2024; 26:355-362. [PMID: 38430457 PMCID: PMC11007809 DOI: 10.1111/jch.14785] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 02/07/2024] [Accepted: 02/11/2024] [Indexed: 03/03/2024]
Abstract
Single-nucleotide polymorphisms (SNP) of ATP2B1 gene are associated with essential hypertension but their association with resistant hypertension (RHT) remains unexplored. The authors examined the relationship between ATP2B1 SNPs and RHT by genotyping 12 SNPs in ATP2B1 gene of 1124 Japanese individuals with lifestyle-related diseases. Patients with RHT had inadequate blood pressure (BP) control using three antihypertensive drugs or used ≥4 antihypertensive drugs. Patients with controlled hypertension had BP controlled using ≤3 antihypertensive drugs. The association between each SNP and RHT was analyzed by logistic regression. The final cohort had 888 (79.0%) and 43 (3.8%) patients with controlled hypertension and RHT, respectively. Compared with patients homozygous for the minor allele of each SNP in ATP2B1, a significantly higher number of patients carrying the major allele at 10 SNPs exhibited RHT (most significant at rs1401982: 5.8% vs. 0.8%, p = .014; least significant at rs11105378: 5.7% vs. 0.9%, p = .035; most nonsignificant at rs12817819: 5.1% vs. 10%, p = .413). After multivariate adjustment for age, sex, systolic BP, and other confounders, the association remained significant for rs2681472 and rs1401982 (OR: 7.60, p < .05 and OR: 7.62, p = .049, respectively). Additionally, rs2681472 and rs1401982 were in linkage disequilibrium with rs11105378. This study identified two ATP2B1 SNPs associated with RHT in the Japanese population. rs1401982 was most closely associated with RHT, and major allele carriers of rs1401982 required significantly more antihypertensive medications. Analysis of ATP2B1 SNPs in patients with hypertension can help in early prediction of RHT and identification of high-risk patients who are more likely to require more antihypertensive medications.
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Affiliation(s)
- Yusuke Kobayashi
- Center for Novel and Exploratory Clinical Trials (Y‐NEXT)Yokohama City UniversityYokohamaJapan
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
| | | | - Aiko Haruna
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Rina Kawano
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Moe Ozawa
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
- Department of Nephrology and HypertensionSaiseikai Yokohamashi Nanbu HospitalYokohamaJapan
| | - Tatsuya Haze
- Center for Novel and Exploratory Clinical Trials (Y‐NEXT)Yokohama City UniversityYokohamaJapan
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Shiro Komiya
- Department of Nephrology and HypertensionSaiseikai Yokohamashi Nanbu HospitalYokohamaJapan
| | - Shota Suzuki
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Yuki Ohki
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Akira Fujiwara
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Sanae Saka
- Department of Nephrology and HypertensionSaiseikai Yokohamashi Nanbu HospitalYokohamaJapan
| | - Nobuhito Hirawa
- Department of Nephrology and HypertensionYokohama City University Medical CenterYokohamaJapan
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal MedicineYokohama City University Graduate School of MedicineYokohamaJapan
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Kobayashi Y, Fujikawa T, Haruna A, Kawano R, Ozawa M, Haze T, Komiya S, Suzuki S, Ohki Y, Fujiwara A, Saka S, Hirawa N, Toya Y, Tamura K. Omega-3 Fatty Acids Reduce Remnant-like Lipoprotein Cholesterol and Improve the Ankle-Brachial Index of Hemodialysis Patients with Dyslipidemia: A Pilot Study. Medicina (Kaunas) 2023; 60:75. [PMID: 38256336 PMCID: PMC10818298 DOI: 10.3390/medicina60010075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/22/2023] [Accepted: 12/28/2023] [Indexed: 01/24/2024]
Abstract
Background and Objectives: Omega-3 fatty acids have potent lipid-lowering and antiplatelet effects; however, randomized controlled trials have yet to examine the effect of high-dose omega-3 fatty acid administration on peripheral artery disease (PAD) in hemodialysis patients with dyslipidemia. Therefore, this study aimed to evaluate the effects of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on the ankle-brachial index (ABI) and remnant-like lipoprotein cholesterol (RLP-C) levels, which are indicators of PAD severity. Materials and Methods: Thirty-eight participants (mean age: 73.6 ± 12.7 years) were randomly assigned using stratified block randomization to either conventional therapy alone or conventional therapy supplemented with high-dose EPA/DHA (EPA: 1860 mg; DHA: 1500 mg) for a three-month intervention period. Patients in the conventional therapy alone group who opted to continue were provided with a low-dose EPA/DHA regimen (EPA: 930 mg; DHA: 750 mg) for an additional three months. The baseline and 3-month values for RLP-C, an atherogenic lipid parameter, and the ABI were recorded. Results: The results of the 3-month assessments revealed that the mean RLP-C changes were -3.25 ± 3.15 mg/dL and 0.44 ± 2.53 mg/dL in the EPA/DHA and control groups, respectively (p < 0.001), whereas the changes in the mean ABI values were 0.07 ± 0.11 and -0.02 ± 0.09 in the EPA/DHA and control groups, respectively (p = 0.007). In the EPA/DHA group, a significant negative correlation was found between the changes in RLP-C levels and the ABI (r = -0.475, p = 0.04). Additionally, the change in the RLP-C levels independently influenced the change in the ABI in the EPA/DHA group, even after adjusting for age, sex, and statin use (p = 0.042). Conclusions: Add-on EPA/DHA treatment improved the effectiveness of conventional therapy (such as statin treatment) for improving the ABI in hemodialysis patients with dyslipidemia by lowering RLP-C levels. Therefore, clinicians involved in dialysis should focus on RLP-C when considering residual cardiovascular disease risk in hemodialysis patients and should consider screening patients with elevated levels.
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Affiliation(s)
- Yusuke Kobayashi
- Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University, Yokohama 236-0004, Japan
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan (K.T.)
| | - Tetsuya Fujikawa
- Center for Health Service Sciences, Yokohama National University, Yokohama 240-8501, Japan
| | - Aiko Haruna
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan (K.T.)
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Rina Kawano
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan (K.T.)
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Moe Ozawa
- Department of Nephrology and Hypertension, Saiseikai Yokohamashi Nanbu Hospital, Yokohama 234-0054, Japan
| | - Tatsuya Haze
- Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University, Yokohama 236-0004, Japan
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Shiro Komiya
- Department of Nephrology and Hypertension, Saiseikai Yokohamashi Nanbu Hospital, Yokohama 234-0054, Japan
| | - Shota Suzuki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Yuki Ohki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Akira Fujiwara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Sanae Saka
- Department of Nephrology and Hypertension, Saiseikai Yokohamashi Nanbu Hospital, Yokohama 234-0054, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama 232-0024, Japan (N.H.)
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan (K.T.)
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan (K.T.)
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Ozawa M, Hirawa N, Haze T, Haruna A, Kawano R, Komiya S, Ohki Y, Suzuki S, Kobayashi Y, Fujiwara A, Saka S, Hanaoka M, Mitsuhashi H, Yamaguchi S, Ohnishi T, Tamura K. The implication of calf circumference and grip strength in osteoporosis and bone mineral density among hemodialysis patients. Clin Exp Nephrol 2023; 27:365-373. [PMID: 36574105 PMCID: PMC10023647 DOI: 10.1007/s10157-022-02308-8] [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: 10/16/2022] [Accepted: 12/02/2022] [Indexed: 12/29/2022]
Abstract
BACKGROUND Chronic kidney disease-mineral and bone disorder (CKD-MBD), nutritional status, and uremia management have been emphasized for bone management in hemodialysis patients. Nevertheless, valuable data on the importance of muscle mass in bone management are limited, including whether conventional management alone can prevent osteoporosis. Thus, the importance of muscle mass and strength, independent of the conventional management in osteoporosis prevention among hemodialysis patients, was evaluated. METHODS Patients with a history of hemodialysis 6 months or longer were selected. We assessed the risk for osteoporosis associated with calf circumference or grip strength using multivariable adjustment for indices of CKD-MBD, nutrition, and dialysis adequacy. Moreover, the associations between bone mineral density (BMD), calf circumference, grip strength, and bone metabolic markers were also evaluated. RESULTS A total of 136 patients were included. The odds ratios (95% confidence interval) for osteoporosis at the femoral neck were 1.25 (1.04-1.54, P < 0.05) and 1.08 (1.00-1.18, P < 0.05) per 1 cm shorter calf circumference or 1 kg weaker grip strength, respectively. Shorter calf circumference was significantly associated with a lower BMD at the femoral neck and lumbar spine (P < 0.001). Weaker grip strength was also associated with lower BMD at the femoral neck (P < 0.01). Calf circumference or grip strength was negatively correlated with bone metabolic marker values. CONCLUSION Shorter calf circumference or weaker grip strength was associated with osteoporosis risk and lower BMD among hemodialysis patients, independent of the conventional therapies.
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Affiliation(s)
- Moe Ozawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan.
| | - Tatsuya Haze
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
- YCU Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University Hospital, Yokohama, Japan
| | - Aiko Haruna
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Rina Kawano
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Shiro Komiya
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Yuki Ohki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
| | - Shota Suzuki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
| | - Yusuke Kobayashi
- YCU Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University Hospital, Yokohama, Japan
| | - Akira Fujiwara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
| | - Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 4-57, Urafune-Cho, Minami-Ku, Yokohama, Japan
| | - Masaaki Hanaoka
- Kamiooka Jinsei Clinic, Kousaikai Medical Corporation, Yokohama, Japan
| | | | - Satoshi Yamaguchi
- Yokohama Jinsei Hospital, Kousaikai Medical Corporation, Yokohama, Japan
| | - Toshimasa Ohnishi
- Kamiooka Jinsei Clinic, Kousaikai Medical Corporation, Yokohama, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Saka S, Konishi M, Kamimura D, Wakui H, Matsuzawa Y, Okada K, Kirigaya J, Iwahashi N, Sugano T, Ishigami T, Hirawa N, Hibi K, Ebina T, Kimura K, Tamura K. Clinical impact of left ventricular systolic dysfunction in patients undergoing dialysis access surgery. Clin Exp Nephrol 2023; 27:374-381. [PMID: 36738363 DOI: 10.1007/s10157-023-02323-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 01/24/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND An arteriovenous fistula (AVF) is the most frequently used dialysis access for haemodialysis. However, it can cause volume loading for the heart and may induce circulatory failure when performed in patients with low cardiac function. This study aimed to characterise patients with low cardiac function when initiating dialysis and determine how cardiac function changes after the dialysis access surgery. METHODS We conducted a retrospective observational study at two centres incorporating 356 patients with end-stage kidney disease who underwent echocardiography before the dialysis access surgery. RESULTS An AVF and a subcutaneously fixed superficial artery were selected in 70.4% and 23.5% of 81 patients with reduced/mildly reduced (< 50%) left ventricular ejection fraction (LVEF), respectively, and in 94.2% and 1.1% of 275 patients with preserved (≥ 50%) LVEF (p < 0.001), respectively. Follow-up echocardiography was performed in 70.4% and 38.2% of patients with reduced/mildly reduced and preserved LVEF, respectively, which showed a significant increase in LVEF (41 ± 9-44 ± 12%, p = 0.038) in patients with reduced/mildly reduced LVEF. LVEF remained unchanged in 12 patients with reduced/mildly reduced LVEF who underwent subcutaneously fixed superficial artery (30 ± 10-32 ± 15%, p = 0.527). Patients with reduced/mildly reduced LVEF had lower survival rates after surgery than those with preserved LVEF (p = 0.021 for log-rank). CONCLUSION The LVEF subcategory was associated with dialysis access selection. After the dialysis access surgery, LVEF was increased in patients with reduced/mildly reduced LVEF. These results may help select dialysis access for patients initiating dialysis.
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Affiliation(s)
- Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Masaaki Konishi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan.
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan.
| | - Daisuke Kamimura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
| | - Hiromichi Wakui
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
| | - Yasushi Matsuzawa
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Kozo Okada
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Jin Kirigaya
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Noriaki Iwahashi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Teruyasu Sugano
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
| | - Tomoaki Ishigami
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Kiyoshi Hibi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Toshiaki Ebina
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
- Department of Laboratory Medicine, Yokohama City University Medical Center, Yokohama, Japan
| | - Kazuo Kimura
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004, Japan
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Haze T, Ozawa M, Kawano R, Haruna A, Ohki Y, Suzuki S, Kobayashi Y, Fujiwara A, Saka S, Tamura K, Hirawa N. Effect of the interaction between the visceral-to-subcutaneous fat ratio and aldosterone on cardiac function in patients with primary aldosteronism. Hypertens Res 2023; 46:1132-1144. [PMID: 36754972 DOI: 10.1038/s41440-023-01170-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/14/2022] [Accepted: 12/16/2022] [Indexed: 02/10/2023]
Abstract
Primary aldosteronism is the most frequent secondary hypertensive disease and is characterized by an elevated risk for cardiovascular disease. The current standard treatments are adrenalectomy and/or administration of mineralocorticoid receptor blockers, both of which are effective at ameliorating hypertension via intervention for hyperaldosteronism. However, both of these approaches have side effects and contraindications, and mineralocorticoid receptor blockers also have limited preventive efficacy against cardiovascular events. Recently, in vitro experiments have shown that aldosterone regulation is closely related to abdominal fat accumulation and that there is crosstalk between aldosterone and visceral fat tissue accumulation. We previously reported that this interaction was clinically significant in renal dysfunction; however, its effects on the heart remain unclear. Here, we analyzed data from 49 patients with primary aldosteronism and 29 patients with essential hypertension to examine the potential effect of the interaction between the ratio of visceral-to-subcutaneous fat tissue volume and the plasma aldosterone concentration on echocardiographic indices, including the tissue Doppler-derived E/e' ratio. A significant interaction was found in patients with primary aldosteronism (p < 0.05), indicating that patients with the combination of a high plasma aldosterone concentration and high visceral-to-subcutaneous fat ratio show an increased E/e' ratio, which is a well-known risk factor for future cardiovascular events. Our results confirm the clinical importance of the interaction between aldosterone and abdominal fat tissue, suggesting that an improvement in the visceral-to-subcutaneous fat ratio may be synergistically and complementarily effective in reducing the elevated risk of cardiovascular disease in patients with primary aldosteronism when combined with conventional therapies for reducing aldosterone activity. A significant effect of the interaction between plasma aldosterone concentration and the visceral-to-subcutaneous fat ratio on the tissue Doppler-derived E/e' ratio in patients with primary aldosteronism.
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Affiliation(s)
- Tatsuya Haze
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan. .,Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan. .,YCU Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University Hospital, Yokohama, Japan.
| | - Moe Ozawa
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Rina Kawano
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Aiko Haruna
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Yuki Ohki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Shota Suzuki
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Yusuke Kobayashi
- YCU Center for Novel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University Hospital, Yokohama, Japan
| | - Akira Fujiwara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
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Haze T, Hatakeyama M, Komiya S, Kawano R, Ohki Y, Suzuki S, Kobayashi Y, Fujiwara A, Saka S, Tamura K, Hirawa N. Association of the ratio of visceral-to-subcutaneous fat volume with renal function among patients with primary aldosteronism. Hypertens Res 2021; 44:1341-1351. [PMID: 34363052 PMCID: PMC8490149 DOI: 10.1038/s41440-021-00719-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 06/16/2021] [Accepted: 07/08/2021] [Indexed: 02/07/2023]
Abstract
Patients with primary aldosteronism have a higher risk of chronic kidney disease. Visceral fat tissue is hypothesized to stimulate the adrenal glands to overproduce aldosterone, and aldosterone promotes visceral fat tissue to produce inflammatory cytokines. However, it is unclear whether the volume of accumulated visceral fat tissue is associated with renal impairment among patients with hyperaldosteronism. We conducted a single-center cross-sectional study to assess the association between the estimated glomerular filtration rate and the ratio of the visceral-to-subcutaneous fat volume calculated by computed tomography. One hundred eighty patients with primary aldosteronism were enrolled. The mean ± SD age was 52.7 ± 11.0 years, and 60.0% were women. The ratio of visceral-to-subcutaneous fat volume was highly correlated with the estimated glomerular filtration rate (r = 0.49, p < 0.001). In multiple linear regression models, the ratio of visceral-to-subcutaneous fat tissue volume was significantly associated with the estimated glomerular filtration rate (estimates: -4.56 mL/min/1.73 m² per 1-SD), and there was an interaction effect between the plasma aldosterone concentration and the ratio of visceral-to-subcutaneous fat volume (p < 0.05). The group with a higher plasma aldosterone concentration exhibited a steeper decline in eGFR than the lower plasma aldosterone concentration group when the ratio increased. The ratio of visceral-to-subcutaneous fat tissue volume was an independent risk factor for renal dysfunction. This association increased in the presence of a high plasma aldosterone concentration. Clinicians should pay attention to the ratio of visceral-to-subcutaneous fat tissue volume and encourage primary aldosteronism patients to improve their lifestyle in addition to treating renin-aldosterone activity.
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Affiliation(s)
- Tatsuya Haze
- grid.268441.d0000 0001 1033 6139Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan ,grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Moe Hatakeyama
- grid.268441.d0000 0001 1033 6139Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan ,grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Shiro Komiya
- grid.268441.d0000 0001 1033 6139Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan ,grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Rina Kawano
- grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Yuki Ohki
- grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Shota Suzuki
- grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Yusuke Kobayashi
- grid.268441.d0000 0001 1033 6139Center for Nobel and Exploratory Clinical Trials (Y-NEXT), Yokohama City University, Yokohama, Japan
| | - Akira Fujiwara
- grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Sanae Saka
- grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Kouichi Tamura
- grid.268441.d0000 0001 1033 6139Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Nobuhito Hirawa
- grid.413045.70000 0004 0467 212XDepartment of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
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Abstract
This study was carried out to investigate the antioxidant effects of curcuma against chromium-induced alterations in hepatic indices and dysfunctions in the antioxidant system. Forty male Wistar rats were randomly divided into four groups and were treated for 30 consecutive days. The control group (0-0) received per os mineral water and normal diet. The second group (0-Cur) received mineral water and an experimental diet containing 2% of curcuma powder, whereas the third group (Cr-0) was orally fed (per os) with 15 mg/kg body weight/day of potassium dichromate and normal diet. The last group (Cr-Cur) received per os 15 mg/kg of potassium dichromate and a diet with 2% of curcuma. The treatment by chromium was found to elicit a perturbation in biochemical parameters producing a significant increase in glycemia, triglycerides, cholesterol, ALP, ALT, AST, and LDH levels. On the contrary, a significant reduction was observed in the oxidative stress-related parameters (GSH, GPx, CAT, and GST). Moreover, we noticed that liver sections of rats intoxicated with chromium showed a disrupted architecture. However, the administration of curcuma revealed an intense reduction in the oxidative stress induced by chromium, ameliorating the levels of the majority of the previous parameters. The data of this study revealed the potent antioxidant effects of curcuma in reducing oxidative stress damage induced by the hexavalent chromium.
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Kehili N, Saka S, Aouacheri O. L’effet phytoprotecteur de la nigelle (Nigella sativa) contre la toxicité induite par le cadmium chez les rats. ACTA ACUST UNITED AC 2018. [DOI: 10.3166/phyto-2018-0053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Kobayashi Y, Ishiguro H, Fujikawa T, Kobayashi H, Sumida K, Kagimoto M, Okuyama Y, Ehara Y, Katsumata M, Fujita M, Fujiwara A, Saka S, Yatsu K, Hirawa N, Toya Y, Yasuda G, Umemura S, Tamura K. Atherosclerosis of the carotid bulb is associated with the severity of orthostatic hypotension in non-diabetic adult patients: a cross-sectional study. Clin Exp Hypertens 2018; 41:1-8. [PMID: 29672186 DOI: 10.1080/10641963.2018.1465073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/20/2018] [Accepted: 04/10/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The carotid bulb has a high density of baroreceptors that play an important role in maintaining blood pressure. We hypothesized that atherosclerosis of the carotid bulb would reflect the severity of orthostatic hypotension more accurately than would atherosclerosis of other carotid artery segments. METHODS This cross-sectional study included 198 non-diabetic adults. We measured the cardio-vascular ankle index as an index of arterial stiffness, intima-media thickness in each carotid artery segment (internal carotid artery, carotid bulb, distal and proximal portions, respectively, of the common carotid artery) as a measure of atherosclerosis, and heart rate variability as a measure of cardiac autonomic function. The sit-to-stand test was used to assess severity of orthostatic hypotension. RESULTS Intima-media thickness of the carotid bulb was correlated with orthostatic systolic blood pressure change (r = -0.218, p = 0.002), cardio-ankle vascular index (r = 0.365, p < 0.001) and heart rate variability parameters. Multivariate regression analysis revealed that among all of the segments, only intima-media thickness of the carotid bulb was an independent predictor of orthostatic systolic blood pressure change (p = 0.022). CONCLUSION Atherosclerosis of the carotid bulb was associated with severity of orthostatic hypotension, arterial stiffening and cardiac autonomic dysfunction than that of other carotid artery segments.
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Affiliation(s)
- Yusuke Kobayashi
- a Division of Nephrology and Hypertension , Saiseikai Yokohamashi Nanbu Hospital , Yokohama , Japan
- b Department of Internal Medicine , The Kobayashi Medical Clinic , Yokohama , Japan
| | - Hiroaki Ishiguro
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Tetsuya Fujikawa
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
- d Center for Health Service Sciences , Yokohama National University , Yokohama , Japan
| | - Hideo Kobayashi
- b Department of Internal Medicine , The Kobayashi Medical Clinic , Yokohama , Japan
| | - Koichiro Sumida
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Minako Kagimoto
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Yuki Okuyama
- a Division of Nephrology and Hypertension , Saiseikai Yokohamashi Nanbu Hospital , Yokohama , Japan
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Yosuke Ehara
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Mari Katsumata
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Megumi Fujita
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Akira Fujiwara
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Sanae Saka
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Keisuke Yatsu
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Nobuhito Hirawa
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Yoshiyuki Toya
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
| | - Gen Yasuda
- e Department of Nephrology and Hypertension , Yokohama City University Medical Center , Yokohama , Japan
| | - Satoshi Umemura
- f Department of Internal Medicine , Yokohama Rosai Hospital , Yokohama , Japan
| | - Kouichi Tamura
- c Department of Medical Science and Cardiorenal Medicine , Yokohama City University Graduate School of Medicine , Yokohama , Japan
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Yasuda G, Saka S, Fujiwara A, Shibata K. SP265IMPAIRED FUNCTION OF THE CORTISOL-CORTISONE-CONVERSION IN PATIENTS WITH CHRONIC KIDNEY DISEASE. Nephrol Dial Transplant 2017. [DOI: 10.1093/ndt/gfx145.sp265] [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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Katsumata M, Hirawa N, Sumida K, Kagimoto M, Ehara Y, Okuyama Y, Fujita M, Fujiwara A, Kobayashi M, Kobayashi Y, Yamamoto Y, Saka S, Yatsu K, Fujikawa T, Toya Y, Yasuda G, Tamura K, Umemura S. Effects of tolvaptan in patients with chronic kidney disease and chronic heart failure. Clin Exp Nephrol 2017; 21:858-865. [PMID: 28190113 PMCID: PMC5648735 DOI: 10.1007/s10157-016-1379-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 12/30/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND Tolvaptan, a vasopressin V2 receptor blocker, has a diuretic effect for patients with heart failure. However, there were a few data concerning the effects of tolvaptan in patients with chronic kidney disease (CKD). METHODS We retrospectively analyzed 21 patients with chronic heart failure and CKD. Tolvaptan was co-administered with other diuretics in-use, every day. We compared clinical parameters before and after the treatments with tolvaptan. Furthermore, we examined the correlations between baseline data and the change of body weight. RESULTS Tolvaptan decreased the body weight and increased the urine volume (p = 0.001). The urine osmolality significantly decreased throughout the study period. Urinary Na/Cr ratio and FENa changed significantly after 4 h, and more remarkable after 8 h (p = 0.003, both). Serum creatinine increased slightly after 1 week of treatment (p = 0.012). The alteration of body weight within the study period correlated negatively with the baseline urine osmolality (r = -0.479, p = 0.038), the baseline urine volume (r = -0.48, p = 0.028), and the baseline inferior vena cava diameter (IVCD) (r = -0.622, p = 0.017). Hyponatremia was improved to the normal value, and the augmentations of the sodium concentration were negatively associated with the basal sodium levels (p = 0.01, r = -0.546). CONCLUSIONS Tolvaptan is effective in increasing diuresis and improved hyponatremia, even in patients with CKD. The baseline urine osmolality, urine volume, and IVCD may be useful predictors for diuretic effects of tolvaptan.
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Affiliation(s)
- Mari Katsumata
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Koichiro Sumida
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Minako Kagimoto
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yosuke Ehara
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yuki Okuyama
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Megumi Fujita
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Akira Fujiwara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Mayumi Kobayashi
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Yusuke Kobayashi
- Department of Nephrology, Yokosuka City Hospital, Yokosuka, Japan
| | - Yuichiro Yamamoto
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Tetsuya Fujikawa
- Center for Health Service Sciences, Yokohama National University, Yokohama, Japan
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Gen Yasuda
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024, Japan
| | - Kouichi Tamura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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Yasuda G, Fujiwara A, Saka S, Hirawa N. SUN-P239: Effects of L-HISTIDINE Supplement on Treatment of Renal Anemia using Erythropoiesis-Stimulating Agents in Patients with Advanced Chronic Kidney Disease. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30582-9] [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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13
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Kobayashi Y, Fujikawa T, Kobayashi H, Sumida K, Suzuki S, Kagimoto M, Okuyama Y, Ehara Y, Katsumata M, Fujita M, Fujiwara A, Saka S, Yatsu K, Hashimoto T, Kuji T, Hirawa N, Toya Y, Yasuda G, Umemura S. Relationship between Arterial Stiffness and Blood Pressure Drop During the Sit-to-stand Test in Patients with Diabetes Mellitus. J Atheroscler Thromb 2016; 24:147-156. [PMID: 27453255 PMCID: PMC5305675 DOI: 10.5551/jat.34645] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Aim: Patients with orthostatic hypotension (OH) have high arterial stiffness. Patients with diabetes mellitus (DM) often have cardiac autonomic neuropathy that leads to OH; however, whether OH is an indicator of arterial stiffness progression is unclear. We aimed to investigate whether the cardioankle vascular index (CAVI) varies between DM patients with and without OH using the sit-to-stand test (STST). Methods: One hundred and fifty-nine patients with DM underwent CAVI assessment and blood pressure (BP) and heart rate change evaluation during the STST. OH was defined as a decline in systolic BP (SBP) and/or diastolic BP of at least 20 mmHg or 10 mmHg, respectively, in the initial and late upright positions compared with that in the sitting position. Results: OH was diagnosed in 42 patients (26.4%). DM patients with OH had significantly higher CAVI (9.36 ± 1.15 versus 8.89 ± 1.18, p = 0.026) than those without OH. CAVI was significantly inversely correlated with systolic and diastolic BP changes (R = −0.347, p <0.001 and R = −0.314, p <0.001, respectively) in the initial upright position. Multivariate regression analysis revealed that age, SBP changes, and low frequency component in the initial upright position were independent determinants of CAVI. Conclusion: Patients with DM having large BP drops occurring when moving from sitting to standing have high arterial stiffness. A significant BP drop during the STST necessitates careful evaluation of advanced arterial stiffness in patient with DM.
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Bouslama S, Boutefnouchet A, Hannache B, Djemil T, Kadi A, Dahdouh A, Saka S, Daudon M. [Composition of 359 kidney stones from the East region of Algeria]. Prog Urol 2015; 26:41-9. [PMID: 26531134 DOI: 10.1016/j.purol.2015.09.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 09/20/2015] [Accepted: 09/25/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE Determine stones composition of the upper urinary tract in the eastern region of Algeria. METHODS Our study focuses on a set of 359 stones of the upper urinary tract collected between January 2007 and December 2012 at hospitals in the eastern region of Algeria and analyzed by Fourier transform infrared spectroscopy. RESULTS The male/female ratio was only 1.32. Calcium oxalate prevailed in 68.5% of stones and 49.3% of nuclei, mainly as whewellite (51.8% of stones and 37.9% of nuclei vs 16.7% and 11.4% respectively for weddellite). Carbapatite prevailed in 15% of stones and 29.8% of nuclei. The struvite, identified in 11.1% of calculi, prevailed in 3.9% of stones and 3.1% of nuclei. Among purines, uric acid prevailed with frequencies quite close to 8.9% and 7% respectively in the stone and in the nucleus while the ammonium urate prevailed in only 0.3% of stones and 3.3% of nuclei. The cystine frequency was 3.6% in both stone and nucleus. The frequency of stone with umbilication was 26.2%. Whewellite was the main component of umbilicated stones with Randall's plaque. CONCLUSION Our results suggest that stones of the urinary tract in the Algerian east region resemble those observed in industrialized countries. Some features such as stones location, the whewellite prevalence, the frequencies of main components in both the stone and the nucleus as well as the formation of stones on renal papilla confirm this trend. LEVEL OF EVIDENCE 4.
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Affiliation(s)
- S Bouslama
- Faculté des sciences, université Badji Mokhtar, 23000 Annaba, Algérie
| | - A Boutefnouchet
- Faculté de médecine, université Badji Mokhtar, 23000 Annaba, Algérie; Unité de recherche sciences des matériaux et applications, université Mentouri, 25000 Constantine, Algérie
| | - B Hannache
- Faculté des sciences, université Mentouri, 25000 Constantine, Algérie
| | - T Djemil
- Faculté de médecine, université Badji Mokhtar, 23000 Annaba, Algérie
| | - A Kadi
- Faculté de médecine, université Badji Mokhtar, 23000 Annaba, Algérie
| | - A Dahdouh
- EHS d'uro-néphrologie Daksi, 25000 Constantine, Algérie
| | - S Saka
- Faculté des sciences, université Badji Mokhtar, 23000 Annaba, Algérie
| | - M Daudon
- Service des explorations fonctionnelles, hôpital Tenon, AP-HP, 4, rue de la Chine, 75020 Paris, France.
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Saka S, Hirawa N, Oka A, Yatsu K, Hirukawa T, Yamamoto R, Matsusaka T, Imai E, Narita I, Endoh M, Ichikawa I, Umemura S, Inoko H. Genome-wide association study of IgA nephropathy using 23 465 microsatellite markers in a Japanese population. J Hum Genet 2015. [PMID: 26202575 DOI: 10.1038/jhg.2015.88] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Immunoglobulin A nephropathy (IgAN) is the most common form of primary glomerulonephritis in many parts of the world. Although previous genome-wide association studies (GWAS) identified the major susceptibility loci for IgAN, the causal genes currently remain unknown. We performed a GWAS using 23 465 microsatellite (MS) markers to identify genes related to IgAN in a Japanese population. A pooled sample analysis was conducted in three-stage screenings of three independent case-control populations, and after the final step of individual typing, 11 markers survived. Of these, we focused on two regions on 6p21 and 12q21 because they (i) showed the strongest relationship with IgAN, and (ii) appeared to be highly relevant to IgAN in view of several previous studies. These regions contained the HLA, TSPAN8 and PTPRR genes. This study on GWAS, using >20 000 MS markers, provides a new approach regarding susceptible genes for IgAN for investigators seeking new tools for the prevention and treatment of IgAN.
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Affiliation(s)
- Sanae Saka
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan.,Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama, Japan
| | - Akira Oka
- The Institute of Medical Science, Tokai University, Isehara, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Takeshi Hirukawa
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Ryohei Yamamoto
- Department of Nephrology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Taiji Matsusaka
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Enyu Imai
- Nakayamadera Imai Clinic, Takarazuka, Japan.,Department of Nephrology, Fujita Health University, Toyoake, Japan
| | - Ichiei Narita
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Masayuki Endoh
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Iekuni Ichikawa
- Department of Ethics, Shinshu Univeristy, Nagano, Japan.,Departments of Pediatrics and Medicine, Vanderbilt University, Nashville, TN, USA
| | - Satoshi Umemura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Hidetoshi Inoko
- The Institute of Medical Science, Tokai University, Isehara, Japan
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Endou H, Tamura K, Saka S, Nishio Y, Takemoto F, Takahashi T. Intranephron ammoniagenesis and its regulation by PGE2 in rats and mice. Contrib Nephrol 2015; 63:86-90. [PMID: 3191719 DOI: 10.1159/000415703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- H Endou
- Department of Pharmacology, Faculty of Medicine, University of Tokyo, Japan
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17
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Yasuda G, Yamamoto Y, Saka S, Hirawa N. PP124-SUN: Serum Albumin Levels, as a Biomarker of Nutritional Status, Influence Nocturnal Decline of Blood Pressure in Diabetic Patients with Chronic Kidney Disease (CKD). Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50166-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Yasuda G, Saka S, Ando D, Hirawa N. Effects of doxazosin as the third agent on morning hypertension and position-related blood pressure changes in diabetic patients with chronic kidney disease. Clin Exp Hypertens 2014; 37:75-81. [DOI: 10.3109/10641963.2014.913599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Gen Yasuda
- Division of Nephrology and Hypertension, Yokohama City University Center Hospital, Kanagawa, Japan
| | - Sanae Saka
- Division of Nephrology and Hypertension, Yokohama City University Center Hospital, Kanagawa, Japan
| | - Daisaku Ando
- Division of Nephrology and Hypertension, Yokohama City University Center Hospital, Kanagawa, Japan
| | - Nobuhito Hirawa
- Division of Nephrology and Hypertension, Yokohama City University Center Hospital, Kanagawa, Japan
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Hirukawa T, Wu Q, Sawada K, Matsusaka T, Saka S, Oka A, Hirawa N, Umemura S, Kakuta T, Endoh M, Inoko H, Ichikawa I, Fukagawa M. Kidney Diseases Enhance Expression of Tetraspanin-8: A Possible Protective Effect against Tubular Injury. Nephron Extra 2014; 4:70-81. [PMID: 24926311 PMCID: PMC4036207 DOI: 10.1159/000362451] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background/Aims TSPAN8 encoding tetraspanin-8 was identified as a candidate gene for immunoglobulin A nephropathy (IgAN) by a genome-wide association study using microsatellites in the Japanese population. Tetraspanin-8 is a cell surface protein that contributes to the migration and invasion of epithelial cells. Methods We performed immunohistochemistry for tetraspanin-8 on human renal biopsy specimens associated with IgAN, antineutrophil cytoplasmic antibody-associated nephropathy and interstitial nephritis, as well as normal renal tissue. Furthermore, to study the potential function of tetraspanin-8, we performed cell migration and invasion assays using human renal tubule cells transfected with tetraspanin-8. Results Tetraspanin-8 was often expressed in vascular smooth muscle cells and occasionally in tubule cells in normal kidney. In the kidneys of all types of nephropathy, tetraspanin-8 staining in the arteries was unaffected, but that in the tubules was enhanced. The degree of tubular staining negatively correlated with the estimated glomerular filtration rate, independently of the type of nephropathy. Tetraspanin-8-expressing tubule cells were found predominantly in distal and collecting tubules, identified by cytokeratin 7 or aquaporin 2 staining. In vitro studies using cultured tubule cells revealed that tetraspanin-8 promoted migration by 2.7-fold without laminin, by 2.8-fold with laminin and invasion into Matrigel by 3.5-fold, suggesting that enhanced tetraspanin-8 may be involved in the repair of tubules. Conclusion The obtained findings indicate that tetraspanin-8 expression is enhanced in injured distal tubules, which may be involved in the repair of tubules by facilitating migration and invasion.
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Affiliation(s)
- Takashi Hirukawa
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
| | - Qiong Wu
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
| | - Kaichiro Sawada
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
| | - Taiji Matsusaka
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
| | - Sanae Saka
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Akira Oka
- Department of Molecular Life Science and Molecular Medicine, Tokai University School of Medicine, Isehara, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Satoshi Umemura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
| | - Takatoshi Kakuta
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
| | - Masayuki Endoh
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
| | - Hidetoshi Inoko
- Department of Molecular Life Science and Molecular Medicine, Tokai University School of Medicine, Isehara, Yokohama, Japan
| | - Iekuni Ichikawa
- Division of Pediatric Nephrology, Vanderbilt University School of Medicine, Nashville, Tenn., USA
| | - Masafumi Fukagawa
- Division of Nephrology, Endocrinology and Metabolism, Department of Internal Medicine, Yokohama, Japan
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Fujiwara A, Hirawa N, Kobayashi Y, Yatsu K, Katsumata M, Ehara Y, Okuyama Y, Yutoh J, Kaneda T, Fujita M, Yamamoto Y, Saka S, Toya Y, Yasuda G, Umemura S. Efficacy of cyclosporine combination therapy for new-onset minimal change nephrotic syndrome in adults. Clin Exp Nephrol 2014; 19:240-6. [PMID: 24771147 PMCID: PMC4412585 DOI: 10.1007/s10157-014-0975-0] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 04/10/2014] [Indexed: 11/28/2022]
Abstract
Background Cyclosporine and prednisolone combination therapy has been used in the treatment of minimal change nephrotic syndrome (MCNS). However, few studies have evaluated the efficacy of cyclosporine combined with intravenous methylprednisolone pulse therapy (MPT) as a first-line treatment for new-onset MCNS. We conducted a retrospective clinical study to evaluate the efficacy and safety of cyclosporine combined with MPT and oral prednisolone for new-onset MCNS in adults. Methods Forty-six adult patients with biopsy-proven MCNS were analyzed retrospectively. This study included three groups. Group 1 (n = 17) was treated with intravenous MPT (0.5 or 1.0 g/day for 3 days) followed by oral cyclosporine (2–3 mg/kg/day) and prednisolone (30 mg/day). Group 2 (n = 15) was treated with intravenous MPT followed by oral prednisolone (0.4–0.8 mg/kg/day). Group 3 (n = 14) was treated with oral prednisolone (0.6–1.0 mg/kg/day) alone. Results The length of hospital stay was the shortest in Group 1 (P < 0.001). The mean duration to achieve <20 mg/day of prednisolone was also the shortest in Group 1 (P < 0.05). Complete remission rates were 100 % in Group 1, 85.7 % in Group 2, and 69.2 % in Group 3 during the 9-month follow-up (P = 0.073). The rate of adverse effects caused by prednisolone was less in Group 1 (P < 0.05). Multivariate analysis revealed that the independent determinants of durations of remission were the selectivity index (P = 0.004), eGFR (P = 0.001) and the use of cyclosporine (P = 0.045). Conclusions Combination therapy with cyclosporine may be a beneficial treatment option for new-onset MCNS in adults because of its clinical efficacy and safety.
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Affiliation(s)
- Akira Fujiwara
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Nobuhito Hirawa
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yusuke Kobayashi
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Keisuke Yatsu
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Mari Katsumata
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yohsuke Ehara
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yuki Okuyama
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Jun Yutoh
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Tomoko Kaneda
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Megumi Fujita
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Yuichiro Yamamoto
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Sanae Saka
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Yoshiyuki Toya
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
| | - Gen Yasuda
- Department of Nephrology and Hypertension, Yokohama City University Medical Center, 45-7 Urafune-cho, Minami-ku, Yokohama, 232-0024 Japan
| | - Satoshi Umemura
- Department of Medical Science and Cardiorenal Medicine, Yokohama City University School of Medicine, Yokohama, Japan
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Yasuda G, Shibata K, Hirawa N, Saka S, Iwamoto T. PP120-MON RELATIONSHIP BETWEEN SERUM ALBUMIN LEVELS, AS A BIOMARKER OF NUTRITIONAL STATUS, AND NOCTURNAL DECLINE OF BLOOD PRESSURE IN ELDERLY PATIENTS. Clin Nutr 2013. [DOI: 10.1016/s0261-5614(13)60431-8] [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: 10/26/2022]
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Clotet S, Soler MJ, Rebull M, Pascual J, Riera M, Kucher AG, Parastaeva MM, Beresneva ON, Ivanova GT, Zaraysky MI, Artemeva AV, Kaukov IG, Smirnov AV, Roszkowska-Chojecka M, Walkowska A, Gawrys O, Olszynski K, Kompanowska-Jezierska E, Walkowska A, Roszkowska-Chojecka M, Gawrys O, Baranowska I, Kompanowska-Jezierska EM, Roszkowska-Chojecka MM, Dobrowolski L, Badzynska B, Olszynski KH, Lipkowski AW, Sadowski J, Kobayashi Y, Hirawa N, Okuyama Y, Fujita M, Fujiwara A, Saka S, Yatsu K, Toya Y, Yasuda G, Umemura S, Oliveira-Sales EB, Maquigussa E, Semedo P, Pereira LG, Camara NOS, Bergamaschi CT, Campos RR, Boim MA, Potenza MA, Sirolli V, Addabbo F, Di Pietro N, Amoroso L, Pipino C, Pandolfi A, Montagnani M, Bonomini M, Quiroz YJ, Rivero M, Yaguas K, Moran L, Rodriguez-Iturbe B, Lee J, Heo NJ, Kim S, Joo KW, Han JS, Rapp W, Raab S, Sprecher U, Funk J, Apfel CM, Conde-Knape K, Qin Y, Mou L, Li X, Li X, Ilatovskaya ME, Andreev-Andrievsky AA, Pozdnev VF, Iliyn AV, Medvedeva NA, Malyszko J, Koc-Zorawska E, Zbroch E, Malyszko JS, Zorawski M, Mysliwiec M, Wakui H, Tamura K, Masuda SI, Tsurumi-Ikeya Y, Fujita M, Kanaoka T, Fujikawa T, Suzuki S, Kobayashi Y, Yabana M, Toya Y, Umemura S, Iimuro S, Imai E, Matsuo S, Watanabe T, Nitta K, Akizawa T, Makino H, Ohashi Y, Hishida A. Hypertension - experimental models. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft128] [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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Kobayashi Y, Hirawa N, Tabara Y, Muraoka H, Fujita M, Miyazaki N, Fujiwara A, Ichikawa Y, Yamamoto Y, Ichihara N, Saka S, Wakui H, Yoshida SI, Yatsu K, Toya Y, Yasuda G, Kohara K, Kita Y, Takei K, Goshima Y, Ishikawa Y, Ueshima H, Miki T, Umemura S. Mice Lacking Hypertension Candidate Gene ATP2B1 in Vascular Smooth Muscle Cells Show Significant Blood Pressure Elevation. Hypertension 2012; 59:854-60. [DOI: 10.1161/hypertensionaha.110.165068] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yusuke Kobayashi
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Nobuhito Hirawa
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yasuharu Tabara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Hidenori Muraoka
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Megumi Fujita
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Nobuko Miyazaki
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Akira Fujiwara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yasuhiro Ichikawa
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yuichiro Yamamoto
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Naoaki Ichihara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Sanae Saka
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Hiromichi Wakui
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Shin-ichiro Yoshida
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Keisuke Yatsu
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshiyuki Toya
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Gen Yasuda
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Katsuhiko Kohara
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshikuni Kita
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Kohtaro Takei
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshio Goshima
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Yoshihiro Ishikawa
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Hirotsugu Ueshima
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Tetsuro Miki
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
| | - Satoshi Umemura
- From the Departments of Medical Science and Cardiorenal Medicine (Y.K., M.F., N.M., A.F., N.I., S.S., H.W., S.Y., Y.T., S.U.) and Molecular Pharmacology and Neurobiology (H.M., K.T., Y.G.) and Cardiovascular Research Institute (Y.Ic., Y.Is.), Yokohama City University Graduate School of Medicine, Yokohama, Japan; Division of Nephrology and Hypertension (N.H., Y.Y., K.Y., G.Y.), Yokohama City University Medical Center, Yokohama, Japan; Department of Geriatric Medicine (Y.T., K.K., T.M.), Ehime
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Yamamoto Y, Hirawa N, Yamaguchi S, Ogawa N, Takeda H, Shibuya K, Kawahara K, Kojima H, Dobashi Y, Fujita M, Azusima K, Miyazaki N, Kobayashi M, Kobayashi C, Fujiwara A, Yuto J, Saka S, Yatsu K, Toya Y, Yasuda G, Ohnishi T, Umemura S. Long-term efficacy and safety of the small-sized β2-microglobulin adsorption column for dialysis-related amyloidosis. Ther Apher Dial 2011; 15:466-74. [PMID: 21974700 DOI: 10.1111/j.1744-9987.2011.00937.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dialysis-related amyloidosis (DRA) is one of the major complications often seen in long-term dialysis patients, and is one of the factors that decreases quality of life. β2-microglobulin (β2-m) is considered to be a major pathogenic factor in dialysis-related amyloidosis. The Lixelle adsorbent column, with various capacities, has been developed to adsorb β2-m from the circulating blood of patients with dialysis-related amyloidosis. Using a minimum type of β2-m-adsorbing column (Lixelle S-15), we evaluated its therapeutic efficacy and safety in dialysis patients. Seventeen hemodialysis patients with DRA were treated with the S-15 column for one year. Treatment was performed three times a week in this study. During the study period, pinch strength, visual analog scale for joint pain, and activities of daily living were evaluated every three months, and blood sampling was performed every six months. After one year's treatment with the S-15 column, the β2-m level decreased from 29.3±9.6mg/L to 24.7±5.1mg/L (P<0.05), and the high sensitive C-reactive protein level decreased from 2996±4380ng/mL to 1292±1774ng/mL. After one year of S-15 column use, pinch strength increased from 5.9±3.0pounds to 7.2±3.2pounds (P<0.05), and the visual analog scale for joint pain and activities of daily living score also improved. Long-term use of the Lixelle S-15 column is safe and effective for improvement of quality of life in chronic dialysis patients. Improvement of chronic inflammation may be one of the mechanisms through which the beneficial effects of the column is effected.
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Affiliation(s)
- Yuichiro Yamamoto
- Division of Nephrology, Dialysis and Apheresis, Yokohama City University Medical Center, 45-7, Urafune-cho, Minami-ku, Yokohama 232-0024, Japan
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Kobayashi M, Hirawa N, Morita S, Yatsu K, Kobayashi Y, Yamamoto Y, Saka S, Toya Y, Yasuda G, Umemura S. Silent Brain Infarction and Rapid Decline of Kidney Function in Patients With CKD: A Prospective Cohort Study. Am J Kidney Dis 2010; 56:468-76. [DOI: 10.1053/j.ajkd.2010.03.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2009] [Accepted: 03/01/2010] [Indexed: 11/11/2022]
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Kobayashi M, Hirawa N, Yatsu K, Kobayashi Y, Yamamoto Y, Saka S, Andoh D, Toya Y, Yasuda G, Umemura S. Relationship between silent brain infarction and chronic kidney disease. Nephrol Dial Transplant 2008; 24:201-7. [PMID: 18697797 PMCID: PMC2639313 DOI: 10.1093/ndt/gfn419] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background. The presence of silent brain infarction (SBI) increases the risk of symptomatic stroke and dementia. The association between SBI and chronic kidney disease (CKD) has not been clarified. Moreover, little is known about what factors are related to SBI in CKD patients and whether the prevalence of SBI differs in CKD stage or cause of CKD. Methods. This is a cross-sectional study. A total of 375 subjects—335 with CKD and 40 with essential hypertension—were included. All subjects underwent magnetic resonance imaging (MRI) of the brain to detect SBI. Glomerular filtration rate (GFR) was estimated using Modification of Diet in Renal Disease equation, and cardiovascular risk factors were examined. Results. The prevalence of SBI was 56.5% in all subjects. Among causes of CKD, hypertensive nephrosclerosis had a strong association with SBI. According to the estimated GFR (eGFR) stage, the more severe the stage of eGFR, the higher the prevalence of SBI (age-adjusted odds ratio [95% confidence interval] for eGFR 30–59, 15–29 and <15 versus ≥60 mL/min/1.73 m2: 1.34 [0.68–1.99], 1.94 [1.30–2.57] and 2.51 [1.91–3.10]). In multivariate logistic analysis, eGFR was related to SBI independently, in addition to age and blood pressure (P = 0.025). However, other traditional and non-traditional risk factors were not. Conclusion. There was an independent association between eGFR and SBI. CKD patients should receive active detection of SBI and more intensive preventive management, especially for hypertension, should be needed in CKD patients to prevent SBI.
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Affiliation(s)
- Mayumi Kobayashi
- Department of Medical Science, Division of Nephrology and Hypertension, Yokohama City University Medical Center, Yokohama City University Graduate School of Medicine and School of Medicine, Yokohama, Japan
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Boukerche S, Aouacheri W, Saka S. [Toxicological effects of nitrate: biological study in human and animal]. Ann Biol Clin (Paris) 2007; 65:385-91. [PMID: 17627919] [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] [Received: 03/15/2007] [Accepted: 04/24/2007] [Indexed: 05/16/2023]
Abstract
In order to evaluate the effects of the nitrates toxicity, a study has been carried out on 45 workers of storage and distribution agricultural manures, exposed to nitrate derivatives. Another experimental study has carried out in laboratory on male Albinos wistar rats. These latter were treated with ammonium nitrate (NH(4)NO(3)) introduced by gavage with three increasing concentrations 200, 400 and 600 mg/kg of body weight during three weeks. The biochemical and hematological results on workers showed that no poisoning was announced within this complex, in spite of the observation of kidneys inflammations among about 50% of the population. The chemical treatment of the rats causes a variation in the biochemical and biological parameters: an increase of the hepato-somatic ratio especially in the rats treated by important doses. Moreover, the serum concentration in glucose, cholesterol, creatinin, lactate dehydrogenase and in transaminases (GOT, GPT) was increased significantly compared to the witness in all the treated rats. At the end, the results obtained highlight the detoxifier potential expressed by the reduction in the glutathione level in the deferent organs such as the liver, the kidneys, the spleen, the intestines and the testicles. According to the obtained results, it can be concluded that: (1) living organism can adapt to the lows doses of nitrate for a long time. This is observed in the workers exposed to deferent derivatives of nitrates; (2) high nitrate amounts involve important biological variations even if the exposure time is short. This is proven in the laboratory animals.
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Affiliation(s)
- S Boukerche
- Laboratoire de biochimie et microbiologie appliquée, Département de biochimie, Faculté des sciences, Université Badji Mokhtar, Annaba, Algérie
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Yasuda G, Yatsu K, Ando D, Saka S, Endo T, Hirawa N, Umemura S. PO23-748 EFFECTS OF ATORVASTATIN VERSUS PROBUCOL ON LOW-DENSITY LIPOPROTEIN SUBTYPE DISTRIBUTION AND RENAL FUNCTION IN HYPERLIPIDEMIC PATIENTS WITHNON-DIABETIC NEPHROPATHY. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71758-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Saka S, Bairi A, Guellati M. [Immuno-corticotropin interactions in a nociceptive environment in the Wistar rat]. J Soc Biol 2003; 197:67-71. [PMID: 12868270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
In pregnant rats, oral administration of ammonium nitrate, stress with ether and antigenic stimulation were found to induce immune variations, hormonal changes and evince the organism's capacities of detoxification. An activation of the immune system and immunosuppression have been recorded respectively during xenobiotics administration and antigenic stimulation, and during stress. Corticotrophe response occurred on the 6th day of gestation and was more pronounced from the 12th day onwards in animals receiving ammonium nitrate. At the end of the gestation period, however, the corticotrophe response became stable in treated animals. Ammonium nitrate administration seemed to drive a major toxicity effect, clearly observed through increased levels of methemoglobine and coincided with a significant decrease in the level of glutathione, confirming a mechanism of detoxification.
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Affiliation(s)
- S Saka
- Département de Biochimie, Département de Biologie, Faculté des Sciences, Université de Annaba, Annaba 23000, Algérie. sakasadz.@yahoo.fr
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Shimada N, Saka S, Sekizuka K, Tanaka A, Takahashi Y, Nakamura T, Ebihara I, Koide H. Increased endothelin: nitric oxide ratio is associated with erythropoietin-induced hypertension in hemodialysis patients. Ren Fail 2003; 25:569-78. [PMID: 12911161 DOI: 10.1081/jdi-120022548] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Regular administration of recombinant human erythropoietin (rHuEPO) is frequently associated with a rise in arterial blood pressure in hemodialysis (HD) patients. The aim of this study was to examine the effects of rHuEPO on plasma endothelin (ET)-1 and nitric oxide products (NOx) concentration in HD patients. Fifteen patients on maintenance HD with hematocrit of less than 25% were included in the present study. All patients received 3,000 units of rHuEPO intravenously three times a week at the end of each HD session. Plasma levels of ET-1, NOx, thromboxane B2 (TXB2), prostacyclin (6-keto-PGF1alpha), and cyclic guanosine 3',5'-monophosphate (cGMP) were measured before, 2, and 4 weeks after rHuEPO treatment. Plasma concentrations of ET-1, TXB2, and 6-keto-PGF1alpha were measured by radioimmunoassay. Plasma NOx was measured by high-performance liquid chromatography. An rHuEPO-induced increase in mean arterial blood pressure of over 6 mmHg occurred in 7 patients (hypertensive group), whereas the elevation of mean arterial blood pressure was less than 5 mmHg in 8 patients (nonhypertensive group). Plasma ET-1 levels were elevated in all HD patients. Elevated plasma ET-1 levels remained unchanged after rHuEPO treatment in the hypertensive group, whereas the increase in plasma ET-1 levels was attenuated in the nonhypertensive group. Plasma NOx concentrations were also increased in all HD patients. This increase in plasma NOx levels was lessened in the hypertensive group after rHuEPO administration; however, plasma NOx levels remained increased in the nonhypertensive group. Changes in mean arterial blood pressure were significantly correlated with changes in plasma ET-1/NOx ratio. Plasma levels of TXB2, 6-keto-PGF1alpha, and cGMP were unchanged after rHuEPO administration in the hypertensive and nonhypertensive groups. These results suggest that an increase in ET-1/NOx ratio in blood, probably occurring in vascular endothelial cells, may be associated with rHuEPO-induced hypertension in HD patients.
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Affiliation(s)
- N Shimada
- Division of Nephrology and Hypertension, Department of Medicine, Koto Hospital, Tokyo, Japan
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Abstract
This empirical study tries to focus on the evidence that the wrong use of oil in food cooking leads to health problems. High temperatures associated with the repeated use of the same oil lead to the breakdown of some fatty acids, forming numerous toxic polymer compounds and peroxides. The obtained data have showed that the ratios of polymer compounds reached 11.3% in oil heated continuously for 10 h at 220 degrees C, and 37.8% in frying oil (FO). Moreover, the polar compound ratios reached 25.6% and 47.6% in continuously heated oil (CHO) and FO, respectively. However, the peroxide concentrations were 157.1 and 133.6 mM/kg in CHOs and FOs, respectively. The observed results have allowed the study of the role of the glutathione redox system in the detoxification and elimination of different toxic peroxides resulting from heated oils. On a diet of 10% of CHO and FO, a significant increase in glutathione peroxidase (GPx) and glutathione reductase (GR) activities appears. This combined relationship between the decreased glutathione content and the increased GPx and GR activities in rats fed on CHO and FO confirms the participation of the glutathione redox system in the detoxifying reactions of continuously accumulated peroxides.
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Affiliation(s)
- S Saka
- Department of Biochemistry, Faculty of Sciences, University of Annaba, Annaba 23000, Algeria. saskasadz.@yahoo.fr
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Shimada N, Hayashi K, Saka S, Nakamura T, Ebihara I, Koide H. Does angiotensin II receptor antagonist Losartan suppress drinking behavior in hemodialysis patients? Ren Fail 2001; 23:753-5. [PMID: 11725925 DOI: 10.1081/jdi-100107375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Shimada N, Omuro H, Saka S, Ebihara I, Koide H. [A case of acute renal failure with rhabdomyolysis caused by the interaction of theophylline and clarithromycin]. Nihon Jinzo Gakkai Shi 1999; 41:460-3. [PMID: 10441997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Theophylline toxicity has been recognized since its introduction into clinical medicine. Clarithromycin is a new oral macrolide antibiotic with excellent antibacterial activity and rare adverse effect. Patients with upper respiratory infection are often treated with theophylline and clarithromycin concurrently. We report a case of acute renal failure due to acute rhabdomyolysis caused by the interaction of theophylline and clarithromycin. A 72-year-old man visited our hospital because of coughing and a sore throat continuing for 1 week. He was diagnosed as having the common cold with a bronchial asthmatic symptom and was prescribed 200 mg/day of sustained-release theophylline for the treatment of asthma for 7 days. One week later, he visited our hospital again. Radiographic study of the chest revealed mild interstitial pneumonia and 200 mg/day of sustained-release theophylline and 400 mg/day of clarithromycin were administrated concomitantly. Five days after the second visit, the patient was admitted to our hospital because of generalized twitching, muscular weakness, high fever and serious general condition. He experienced generalized muscular twitching and tremor. Blood urea nitrogen was 106.1 mg/dl, serum creatinine was 7.4 mg/dl, serum creatinine kinase (CK) was 36,000 IU/l (normal 15-130 IU/l), CK isozyme revealed the following ratio: BB 0%, MB 1% and MM 99%. He was diagnosed as having acute renal failure with rhabdomyolysis caused by the interaction of theophylline and clarithromycin. Hemodialysis therapy was started. After 5 weeks, his serum creatinine was markedly decreased. It is well-known that clarithromycin enhances the serum concentration of theophylline by inhibition of the cytochrome P450-dependent pathway in hepatocytes. Theophylline toxicity may be enhanced when clarithromycin is administrated concomitantly, especially to elderly patients with dehydration.
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Affiliation(s)
- N Shimada
- Department of Medicine, Koto Hospital, Tokyo, Japan
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Guo X, Saka S, Okada K. Indepth exploration on history of Qing doctors traveling to Japan. Zhonghua Yi Shi Za Zhi 1999; 29:115-20. [PMID: 11623852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
During the one hundred years and more from the beginning of the 18th century to the beginning of the 19th century, about 16 Chinese doctors, at the invitation of Japanese, went to Japan successively by trade ships to practice medicine and teach Chinese medicine. They also conducted academic exchanges with Japanese doctors. Because both the Japanese authorities of that time and the emperor of Qing dynasty implemented the policy of closing the country, they could only do things in certain areas within limited time. By consulting a vast amount of data and following the footprints of some of the Chinese doctors in Japan, the author has got things into shape about the comings and goings of the doctors who went to Japan during the century and their activities, with the stressed point laid on the achievements of such influential doctors as Zhu Laizhang, Zhu Zizhang, Zhou Qilai, Zhao Songyang, Li Renshan, Hu Zhaoxin and so on.
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Affiliation(s)
- X Guo
- Department of Medical History, Juntendo University, School of Medicine, Japan
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Tomino Y, Ohmuro H, Takahashi Y, Suzuki Y, Saka S, Tashiro K, Shirato I, Koide H. Binding capacity of serum IgA to jacalin in patients with IgA nephropathy using jacalin-coated microplates. Nephron Clin Pract 1995; 70:329-33. [PMID: 7477622 DOI: 10.1159/000188613] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Binding capacity of serum IgA to jacalin in 22 patients with IgA nephropathy, 14 patients with diffuse mesangial proliferative glomerulonephritis (non-IgA nephropathy) and 20 age-matched healthy adults was examined by enzyme-linked immunoassay (ELISA) using jacalin-coated microplates. In contrast to previous findings, the binding capacity of serum IgA to jacalin in patients with IgA nephropathy measured by ELISA using jacalin-coated microplates was significantly higher than that in healthy adults. The ratio of serum IgA levels measured by this method to those obtained by single radial immunodiffusion was significantly increased in patients with IgA nephropathy. It appeared that the capacity of serum IgA binding to jacalin was marked in these patients. It is concluded that the binding capacity of serum IgA to jacalin is not ubiquitously impaired in all patients with IgA nephropathy.
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Affiliation(s)
- Y Tomino
- Department of Medicine, Juntendo University School of Medicine, Tokyo, Japan
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Tsukamoto Y, Saka S, Saitoh M. Parathyroid hormone stimulates ATP-dependent calcium pump activity by a different mode in proximal and distal tubules of the rat. Biochim Biophys Acta 1992; 1103:163-71. [PMID: 1309659 DOI: 10.1016/0005-2736(92)90070-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A new technique was developed to isolate basolateral membrane vesicles individually from proximal and distal tubules of the rat cortex. This new technique enabled us to study differences in their kinetics and mechanisms of hormonal regulation of Ca pump between proximal and distal tubules. The Ca pump in distal tubule has very high affinity (42.6 nM Ca2+) and the one in proximal tubule has relatively low affinity (75.6 nM Ca2+). Parathyroidectomy (PTX) decreased the Vmax of Ca pump activity in proximal tubule (4.68 +/- 0.99 vs. 9.08 +/- 2.21 nmol 45Ca2+/min per mg protein BLMV, P less than 0.05), while it increased Km in distal tubule (93.1 +/- 11.0 vs. 35.1 +/- 16.1 nM Ca2+, P less than 0.05). Restoration of serum Ca2+ concentration by 1,25(OH)2D3 supplement could not reverse these changes by PTX in Ca pump activity in either the proximal or the distal tubule. In conclusion, this study strongly suggested that parathyroid hormone stimulated Ca pump activity by increasing the Vmax in proximal tubule and by increasing the affinity in distal tubule. 1,25(OH)2D3 does not have a direct effect on the basolateral membrane Ca pump activity.
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Affiliation(s)
- Y Tsukamoto
- Department of Medicine, Kitasato University School of Medicine, Kanagawa, Japan
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Tsukamoto Y, Saka S, Kumano K, Iwanami S, Ishida O, Marumo F. Abnormal accumulation of vanadium in patients on chronic hemodialysis therapy. Nephron Clin Pract 1990; 56:368-73. [PMID: 2079994 DOI: 10.1159/000186177] [Citation(s) in RCA: 18] [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: 12/30/2022] Open
Abstract
Vanadium (V) has been reported to inhibit a number of enzyme activities such as those of Na(+)-K(+)-ATPase. The main excretory pathway of this element is via the kidney. These facts led us to study the V distribution in uremic patients. As a result, hemodialysis patients at our dialysis center exhibited extremely high levels of serum V (23.9 +/- 11.3 ng/ml, n = 43) as compared with healthy adults. Nondialysis patients did not show increased serum V concentrations. The V contents were significantly elevated in the skin and in the aortae of hemodialysis patients. It was found that the tap water from Kanagawa prefecture, Japan, had the highest V concentrations among the 21 cities in Japan and the US. In conclusion, oral ingestion of V-contaminated water has likely caused an accumulation of the metal in patients with end-stage renal failure.
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Affiliation(s)
- Y Tsukamoto
- Department of Medicine, Kitasato University of Medicine, Sagamihara, Japan
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Chikamori T, Saka S, Nagano H, Saeki S, Lacaz CDS, Rodrigues MC, Cassaguerra CM, Braccialli ML. Paracoccidioidomycosis in Japan. Report of a case. Rev Inst Med Trop Sao Paulo 1984; 26:267-71. [PMID: 6099907 DOI: 10.1590/s0036-46651984000500007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Os Autores descrevem um caso de paracoccidioidomicose em Tóquio, o segundo observado no Japão. A paciente residiu cerca de cinco anos na zona urbana de São Paulo, onde provavelmente adquiriu a primo-infecção. Não tomou corticóides, nem teve história de outras afecções que justificassem a paracoccidioidomicose. Após três anos do retorno ao Japão apresentou linfadenopatia, comprometimento hepatesplênico e ausência de lesões pulmonares. O presente caso, com exame histopatoló-gico e cultivo positivos para Paracoccidioides brasiliensis também apresentou quadro soroló-gico compatível. O aspecto blástico das lesões ósseas, raro em arcos costáis nesta micose, bem como a linfadenopatia generalizada são discutidos. Tratamento à base de anfotericina B e ketoconazol ofereceu resultados favoráveis. Neste trabalho os Autores discutem o problema de "patologia de importação", com suas implicações.
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