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Liou KY, Liou HH, Fang YW, Leu JG, Tsai MH. Association between peripheral arterial occlusive disease and cardiothoracic ratio in patients on chronic hemodialysis. Sci Rep 2016; 6:38458. [PMID: 27918569 PMCID: PMC5137470 DOI: 10.1038/srep38458] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 11/09/2016] [Indexed: 11/09/2022] Open
Abstract
The cardiothoracic ratio (CTR) and peripheral arterial occlusive disease (PAOD) are related to mortality in hemodialysis patients. However, data on the association between PAOD and CTR are limited. In this study, we aim to elucidate this relationship in patients on chronic hemodialysis. Using a retrospective cross-sectional study of 622 Taiwanese patients, we investigated the association of PAOD and CTR. PAOD was significantly associated with CTR in the crude analysis. The odds ratio (OR) for CTR >0.5 was 1.77 [95% confidence interval (CI), 1.32-2.37], and the odds ratio for CTR >0.6 was 2.18 [95% CI, 1.44-3.30]. After adjusting for confounding variables, this difference continued to exhibit significant predictive power for CTR >0.6 (OR, 1.88; 95% CI, 1.14-3.11), but the predictive power for CTR >0.5 was attenuated (OR, 1.41; 95% CI, 0.98-2.03). In the subgroup analysis, PAOD was an independent factor for CTR >0.6, particularly in elderly and female patients or patients with hemoglobin >10 mg/dl and with no history of cardiovascular disease. In this research, we showed that the detection of PAOD was independently associated with CTR >0.6 in patients on chronic hemodialysis.
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Affiliation(s)
- Kang-Yi Liou
- Division of Nephrology, Department of Internal Medicine, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan (R.O.C)
| | - Hung-Hsiang Liou
- Division of Nephrology, Department of Internal Medicine, Hsin-Jen Hospital, New Taipei City, Taiwan (R.O.C)
| | - Yu-Wei Fang
- Division of Nephrology, Department of Internal Medicine, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan (R.O.C).,Fu-Jen Catholic University School of Medicine, Taipei, Taiwan (R.O.C)
| | - Jyh-Gang Leu
- Division of Nephrology, Department of Internal Medicine, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan (R.O.C).,Fu-Jen Catholic University School of Medicine, Taipei, Taiwan (R.O.C)
| | - Ming-Hsien Tsai
- Division of Nephrology, Department of Internal Medicine, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan (R.O.C).,Fu-Jen Catholic University School of Medicine, Taipei, Taiwan (R.O.C).,Division of Biostatistics, Institutes of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan (R.O.C)
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Abstract
Hyperphosphatemia is a major cause of morbidity and mortality in patients with chronic kidney disease. The association between hyperphosphatemia and increased risk of death from cardiovascular disease/vascular calcification has been well established for a long time. This review explores the new aspects of pathogenesis of vascular calcification, as demonstrated by recent advances showing a recognized regulating role of phosphorus in vascular smooth muscle cell calcification. This novel mechanism may help in finding a new pharmacological therapy to reduce, or prevent blood vessel calcification. Furthermore, recent experimental and clinical studies involved in the treatment of hyperphosphatemia are reviewed in this article.
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Affiliation(s)
- Akram M Askar
- Department of Medicine (38), King Saud University, PO Box 2925, Riyadh 11461, Kingdom of Saudi Arabia. Tel. +966 (11) 4690155. Fax. +966 (11) 4672671. E-mail.
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Nakayama M, Kaizu Y, Nagata M, Ura Y, Ikeda H, Shimamoto S, Kuma K. Fibroblast growth factor 23 is associated with carotid artery calcification in chronic kidney disease patients not undergoing dialysis: a cross-sectional study. BMC Nephrol 2013; 14:22. [PMID: 23339433 PMCID: PMC3554512 DOI: 10.1186/1471-2369-14-22] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 01/18/2013] [Indexed: 12/27/2022] Open
Abstract
Background Fibroblast growth factor 23 (FGF23) is an important hormone in the regulation of phosphate metabolism. It is unclear whether FGF23 is associated with carotid artery calcification (CAAC) in predialysis patients. The present study aimed to clarify the relationship between FGF23 and CAAC in patients with chronic kidney disease (CKD) who were not on dialysis. Methods One-hundred ninety-five predialysis CKD patients were enrolled in this cross-sectional study. CAAC was assessed using multidetector computed tomography, and the prevalence of CAAC was examined. Intact FGF23 was measured in each patient. The risk factors for CAAC were evaluated using a logistic regression model. Results We found CAAC in 66% of the patients. The prevalence of CAAC significantly increased across CKD stages: it was 37% in CKD stages 1–2, 58% in stage 3; 75% in stage 4, and 77% in stage 5 (p < 0.01). In multivariate analysis, smoking, diabetes mellitus and log FGF23 were each identified as risk factors for CAAC. The study population was divided in quartiles of FGF23 levels. Compared with the lowest FGF23 quartile, each subsequent quartile had a progressively higher odds ratio (OR) for CAAC, adjusted for confounders (ORs [95% confidence interval] of 2.34 [0.78 to 7.31], 5.28 [1.56 to 19.5], and 13.6 [2.92 to 74.6] for the second, third, and fourth quartiles, respectively. Conclusions The prevalence of CAAC is increased with the decline in the kidney function. FGF23 is independently related to CAAC in patients with CKD who are not on dialysis.
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Affiliation(s)
- Masaru Nakayama
- Division of Nephrology and Clinical Research Institute, Department of Internal Medicine, National Kyushu Medical Center Hospital, 1-8-1 Jigyohama, Chuo-ku, Fukuoka 810-8563, Japan.
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Persistently low intact parathyroid hormone levels predict a progression of aortic arch calcification in incident hemodialysis patients. Clin Exp Nephrol 2012; 16:433-41. [DOI: 10.1007/s10157-011-0577-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Accepted: 12/05/2011] [Indexed: 01/17/2023]
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Abstract
The klotho gene was originally identified as a putative age-suppressing gene in mice that extends life span when overexpressed. It induces complex phenotypes resembling human premature aging syndromes when disrupted. The gene was named after a Greek goddess Klotho who spun the thread of life. Since then, various functional aspects of the klotho gene have been investigated, leading to the identification of multiple novel endocrine axes that regulate various metabolic processes and an unexpected link between mineral metabolism and aging. The purposes of this review were to overview recent progress on Klotho research and to discuss a novel aging mechanism.
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Affiliation(s)
- Makoto Kuro-o
- Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX, USA.
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Chen KH, Hung CC, Lin-Tan DT, Huang WH, Hsu CW, Weng SM, Lin JL. Cardiothoracic ratio association with mortality in patients on maintenance peritoneal dialysis. Ther Apher Dial 2010; 15:81-8. [PMID: 21272257 DOI: 10.1111/j.1744-9987.2010.00860.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The cardiothoracic ratio (CTR) indicates the left ventricular size; however, the significance of the CTR in patients on maintenance peritoneal dialysis (PD) remains unclear. In this study, 335 PD patients were enrolled and demographic, biochemical, co-morbidity, and dialysis-related data were obtained. The factors determining CTR were further analyzed. All patients were followed up for two years to investigate the mortality risks. We defined a normal CTR as less than the mean CTR value, mild cardiomegaly as a CTR between the mean and mean + 1 SD, and moderate-to-severe cardiomegaly as more than the mean CTR + 1 SD. Among the 335 patients, 163 patients were classified as having a normal CTR (<49.2%), 112 patients as having mild cardiomegaly (CTR 49.2-55.7%), and 60 patients as having moderate-to-severe cardiomegaly (CTR > 55.7%). χ(2) -analysis showed that the incidences of malnutrition and anemia were significantly higher in patients with severe cardiomegaly than in patients of the other groups. The CTR was positively correlated with age, but negatively correlated with albumin and hemoglobin levels. Twenty-six patients (7.7%) had died by the end of the study. Cox multivariate analysis revealed that the CTR significantly predicts all-cause two-year mortality in PD patients on maintenance PD; therefore, the CTR correlates with the nutritional and anemic status of PD patients and is a reliable predictor for all-cause two-year mortality. The analytical results of this study support continued efforts to reduce the CTR and treat underlying causes in patients with cardiomegaly.
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Affiliation(s)
- Kuan-Hsing Chen
- Department of Nephrology, Lin-Kou Medical Center, Chang Gung Memorial Hospital, Taipei, Taiwan
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Hsiao CH, Chao A, Chu SY, Lin KK, Yeung L, Lin-Tan DT, Lin JL. Association of severity of conjunctival and corneal calcification with all-cause 1-year mortality in maintenance haemodialysis patients. Nephrol Dial Transplant 2010; 26:1016-23. [PMID: 20702534 DOI: 10.1093/ndt/gfq485] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Conjunctival and corneal calcification (CCC) is the most common form of metastatic calcification in patients with chronic renal failure. The aim of this study is to investigate if severity of CCC correlates with vascular calcification and mortality in maintenance haemodialysis (MHD) patients. METHODS One hundred and nine MHD patients were recruited. CCC was evaluated by external eye photographs, and was graded and scored according to modified Porter and Crombie classification system described by Tokuyama et al. Chest X-ray examination was used to evaluate aortic arch calcification. Geographic, haematological, biochemical and dialysis-related data were obtained. The patients were analysed for traditional and non-traditional risk factors for cardiovascular disease stratified by severity of CCC. All patients were followed up for 1 year to investigate the risks for mortality. RESULTS Forty-three, 35 and 31 patients had mild (scores ≤ 4), moderate and severe (scores ≥ 9) CCC at baseline, respectively. With trend estimation, patients with severe CCC had a significantly higher percentage of severe aortic arch calcification. Multiple linear regression analysis showed that hypertension, haemodialysis duration and corrected calcium level were associated with scores of CCC in MHD patients. Moreover, age, corrected calcium-phosphate level, and moderate and severe CCC were associated with grades of aortic arch calcification. At 1-year follow-up, 11 of 109 (10.1%) patients had died. Multivariate Cox proportional hazards model showed that age, corrected calcium and severe CCC were significant risk factors for all-cause 1-year mortality in MHD patients. Each increment of one score of CCC is associated with a 26.4% increased risk for all-cause mortality. CONCLUSIONS Severity of CCC, which is easily obtained at bedside, acts as an independent predictor for all-cause 1-year mortality in MHD patients.
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Affiliation(s)
- Ching-Hsi Hsiao
- Department of Ophthalmology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
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Ciftçioğlu N, McKay DS. Pathological calcification and replicating calcifying-nanoparticles: general approach and correlation. Pediatr Res 2010; 67:490-9. [PMID: 20094006 DOI: 10.1203/pdr.0b013e3181d476ce] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Calcification, a phenomenon often regarded by pathologists little more than evidence of cell death, is becoming recognized to be important in the dynamics of a variety of diseases from which millions of beings suffer in all ages. In calcification, all that is needed for crystal formation to start is nidi (nuclei) and an environment of available dissolved components at or near saturation concentrations, along with the absence of inhibitors for crystal formation. Calcifying nanoparticles (CNP) are the first calcium phosphate mineral containing particles isolated from human blood and were detected in numerous pathologic calcification related diseases. Controversy and critical role of CNP as nidi and triggering factor in human pathologic calcification are discussed.
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Affiliation(s)
- Neva Ciftçioğlu
- Astromaterials Research and Exploration Science [N.C., D.S.M.], National Aeronautics and Space Administration, Johnson Space Center, Houston, Texas 77058, USA.
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Orimo H. The Mechanism of Mineralization and the Role of Alkaline Phosphatase in Health and Disease. J NIPPON MED SCH 2010; 77:4-12. [DOI: 10.1272/jnms.77.4] [Citation(s) in RCA: 443] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Hideo Orimo
- Division of Medical and Biological Chemistry, Graduate School of Medicine, Nippon Medical School
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Shantouf R, Kovesdy CP, Kim Y, Ahmadi N, Luna A, Luna C, Rambod M, Nissenson AR, Budoff MJ, Kalantar-Zadeh K. Association of serum alkaline phosphatase with coronary artery calcification in maintenance hemodialysis patients. Clin J Am Soc Nephrol 2009; 4:1106-14. [PMID: 19423565 DOI: 10.2215/cjn.06091108] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND OBJECTIVES Recent in vitro studies have shown a link between alkaline phosphatase and vascular calcification in patients with chronic kidney disease (CKD). High serum levels of alkaline phosphatase are associated with increased death risk in epidemiologic studies of maintenance hemodialysis (MHD) patients. We hypothesized that coronary artery calcification is independently associated with increased serum alkaline phosphatase levels in MHD patients. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS We examined the association of coronary artery calcification score (CACS) and alkaline phosphatase in 137 randomly selected MHD patients for whom markers of malnutrition, inflammation, and bone and mineral disorders were also measured. RESULTS Serum alkaline phosphatase was the only measure with significant and robust association with CACS (P < 0.003), whereas either other biochemical markers had no association with CACS or their association was eliminated after controlling for case-mix variables. Serum alkaline phosphatase >120 IU/L was a robust predictor of higher CACS and was particularly associated with the likelihood of CACS >400 (multivariate odds ratio 5.0 95% confidence interval 1.6 to 16.3; P = 0.007). Serum alkaline phosphatase of approximately 85 IU/L seemed to be associated with the lowest likelihood of severe coronary artery calcification, but in the lowest tertile of alkaline phosphatase, the CACS predictability was not statistically significant. CONCLUSIONS An association between serum alkaline phosphatase level and CACS exists in MHD patients. Given the high burden of vascular calcification in patients with CKD, examining potential therapeutic interventions to modulate the alkaline phosphatase pathway may be warranted.
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Affiliation(s)
- Ronney Shantouf
- Harold Simmons Center for Kidney Disease Research and Epidemiology, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California 90502, USA
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Gelev S, Spasovski G, Dzikova S, Trajkovski Z, Damjanovski G, Amitov V, Sikole A. Vascular calcification and atherosclerosis in hemodialysis patients: what can we learn from the routine clinical practice? Int Urol Nephrol 2008; 40:763-70. [PMID: 18584302 DOI: 10.1007/s11255-008-9379-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Accepted: 03/24/2008] [Indexed: 11/25/2022]
Abstract
BACKGROUND Hemodialysis (HD) patients are at increased risk for arterial intimal (AIC) and medial calcification (AMC). METHODS In a cross-sectional study on 153 HD patients we evaluated the presence of AIC and AMC using plain radiography of the pelvis and the presence of atherosclerotic lesions using high-resolution B-mode ultrasonography of the common carotid arteries (CCA). RESULTS The radiography of the pelvis confirmed the frequent presence of AIC (35.3%) and AMC (35.9%) in our HD patients. Arterial calcification was absent (non calcified-NC) in a minority of patients (28.8%). Patients with AIC had significantly higher prevalence of atherosclerotic plaques on CCA (78.6%) compared with both other groups and a higher number of documented atherosclerotic complications, such as cardiovascular (85.2%), cerebrovascular (33.3%) and peripheral arterial disease (38.9%) in comparison with the NC patients. According to the 1-year calculated data from patient records, there were no significant differences in the specific HD risks, such as the dose of prescribed calcium carbonate and vitamin D3, serum levels of calcium, phosphate, calcium-phosphate product and intact parathyroid hormone. All four bone metabolism markers within the range proposed by K/DOQI guidelines were achieved in 9.3%, 14.5% and 20.4% in the AIC, AMC and NC group, respectively. CONCLUSIONS Patients with AIC and AMC are frequently found in the HD population. Screening for arterial calcifications in chronic kidney disease patients is suggested even in the early pre-dialysis period. The highest proportion of patients within the guidelines proposed range for bone and mineral metabolism markers was observed in the NC group. A longer period of data analysis is required in order to evaluate the possible role of some traditional and HD-specific risk factors for the development of arterial calcifications. The achievement of the K/DOQI guidelines is an important issue in the prevention of those conditions.
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Affiliation(s)
- Saso Gelev
- Department of Nephrology, University Clinical Center, Vodnjanska 17, 1000 Skopje, Republic of Macedonia
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Memon F, El-Abbadi M, Nakatani T, Taguchi T, Lanske B, Razzaque MS. Does Fgf23-klotho activity influence vascular and soft tissue calcification through regulating mineral ion metabolism? Kidney Int 2008; 74:566-70. [PMID: 18528324 DOI: 10.1038/ki.2008.218] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Recent studies describe a novel role of fibroblast growth factor-23 (Fgf23)-klotho activity in the systemic regulation of calcium and phosphate homeostasis. Both Fgf23 and klotho ablated mice develop extensive vascular and soft tissue calcification. Inability to clear the required amount of phosphate by the kidney, due to the absence of Fgf23-klotho activity, leads to increased accumulation of serum phosphate in these genetically modified mice, causing extensive calcification. Serum calcium and 1,25 hydroxyvitamin D levels are also elevated in both Fgf23 and klotho ablated mice. Moreover, increased sodium phosphate co-transporter activity in both Fgf23 and klotho ablated mice increases renal phosphate reabsorption which in turn can facilitate calcification. Collectively, these observations bring new insights into our understanding of the roles of the Fgf23-klotho axis in the development of vascular and soft tissue calcification.
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Affiliation(s)
- Fahad Memon
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Massachusetts, USA
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Chen KH, Lin-Tan DT, Huang WH, Hung CC, Chang CT, Huang JY, Lin JL. Cardiothoracic Ratio, Malnutrition, Inflammation, and Two-Year Mortality in Non-Diabetic Patients on Maintenance Hemodialysis. ACTA ACUST UNITED AC 2008; 31:143-51. [DOI: 10.1159/000127388] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Accepted: 02/11/2008] [Indexed: 11/19/2022]
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Othmane TEH, Bakonyi G, Egresits J, Fekete BC, Fodor E, Jarai Z, Jekkel C, Nemcsik J, Szabo A, Szabo T, Kiss I, Tisler A. Effect of sevelamer on aortic pulse wave velocity in patients on hemodialysis: a prospective observational study. Hemodial Int 2007; 11 Suppl 3:S13-21. [PMID: 17897105 DOI: 10.1111/j.1542-4758.2007.00224.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Aortic stiffening and aortic calcification are risk factors for cardiovascular events in hemodialysis (HD) patients, and these 2 risk factors are interrelated. Sevelamer decreases aortic calcification but its effect on aortic stiffness has not been investigated previously. Thirteen HD patients commencing sevelamer treatment and 13 matched controls were followed for 11 months. Aortic pulse wave velocity (PWV), augmentation index (AIx), and levels of inhibitors of vascular calcification (fetuin-A, matrix-GLA-protein, osteoprotegerin/RANKL) were measured at baseline and at the end of follow-up, and the differences between the groups were compared. Determinants of the changes in PWV during follow-up were assessed by multivariate linear regression. At baseline, PWV was 9.93 (2.10) m/s in sevelamer-treated patients and 9.20 (2.84) m/s in control patients (p=0.464). By the end of follow-up, PWV decreased by 0.83 (2.3) m/s in sevelamer-treated patients while it increased by 0.93 (1.88) m/s in controls (p=0.042). The direction of changes in AIx were similar, but not statistically significant. There were no significant differences in the levels of inhibitors of calcification either at baseline or during follow-up. In multivariate linear regression sevelamer treatment, diabetes, heart rate, and C-reactive protein were related to the change in PWV. These data suggest that sevelamer treatment is associated with an improvement in aortic stiffness in HD patients, but it does not seem to affect serum levels of inhibitors of vascular calcification.
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Affiliation(s)
- Taha El Hadj Othmane
- 1st Department of Medicine, Semmelweis University, 2/a Korányi S, Budapest, Hungary
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Eijken M, Swagemakers S, Koedam M, Steenbergen C, Derkx P, Uitterlinden AG, van der Spek PJ, Visser JA, de Jong FH, Pols HAP, van Leeuwen JPTM. The activin A-follistatin system: potent regulator of human extracellular matrix mineralization. FASEB J 2007; 21:2949-60. [PMID: 17449718 DOI: 10.1096/fj.07-8080com] [Citation(s) in RCA: 138] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Bone quality is an important determinant of osteoporosis, and proper osteoblast differentiation plays an important role in the control and maintenance of bone quality. We investigated the impact of activin signaling on human osteoblast differentiation, extracellular matrix formation, and mineralization. Activins belong to the transforming growth factor-beta superfamily and activin A treatment strongly inhibited mineralization in osteoblast cultures, whereas the activin antagonist follistatin increased mineralization. Osteoblasts produced activin A and follistatin in a differentiation-dependent manner, leading to autocrine regulation of extracellular matrix formation and mineralization. In addition, mineralization in a vascular smooth muscle cell-based model for pathological calcification was inhibited. Comparative activin A and follistatin gene expression profiling showed that activin signaling changes the expression of a specific range of extracellular matrix proteins prior to the onset of mineralization, leading to a matrix composition with reduced or no mineralizing capacity. These findings demonstrate the regulation of osteoblast differentiation and matrix mineralization by the activin A-follistatin system, providing the possibility to control bone quality as well as pathological calcifications such as atherosclerosis by using activin A, follistatin, or analogs thereof.
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Affiliation(s)
- Marco Eijken
- Erasmus MC, Department Internal Medicine, 3000 CA, Rotterdam, The Netherlands
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Hermans MMH, Brandenburg V, Ketteler M, Kooman JP, van der Sande FM, Boeschoten EW, Leunissen KML, Krediet RT, Dekker FW. Association of serum fetuin-A levels with mortality in dialysis patients. Kidney Int 2007; 72:202-7. [PMID: 17342178 DOI: 10.1038/sj.ki.5002178] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Calcifying atherosclerosis is an active process, which is controlled by calcification inhibitors and inducers. Fetuin-A, an acute phase glycoprotein, is one of the more powerful circulating inhibitors of hydroxyapatite formation. A prospective multicenter cohort study was initiated to include both hemodialysis (HD) and peritoneal dialysis (PD) patients in an evaluation of the association of serum fetuin-A levels with both cardiovascular (CV) and non-CV mortality. An increase in the serum fetuin-A concentration of 0.1 g/l was associated with a significant reduction in all-cause mortality of 13%. There was a significant 17% reduction in non-CV mortality and a near significant reduction in CV mortality. This association of fetuin-A and mortality rates was comparable in both HD and PD patients even when corrected for factors, including but not limited to age, gender, primary kidney disease, C-reactive protein levels, and nutritional status. We conclude that serum fetuin-A concentrations may be a general predictor of mortality in dialysis patients.
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Affiliation(s)
- M M H Hermans
- Department of Internal Medicine and Nephrology, Academic Hospital Maastricht, Maastricht, The Netherlands.
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Doehring LC, Kaczmarek PM, Ehlers E, Mayer B, Erdmann J, Schunkert H, Aherrahrou Z. Arterial calcification in mice after freeze-thaw injury. Ann Anat 2006; 188:235-42. [PMID: 16711162 DOI: 10.1016/j.aanat.2006.01.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Vascular calcification is highly correlated with atherosclerosis and cardiovascular disease and is a significant predictor of cardiovascular morbidity and mortality. Studies in mice indicate a genetic contribution to this dystrophic extra osseous calcification. We sought to elaborate a method to induce dystrophic arterial calcification in mice and further examine the pathogenetical mechanisms involved in the phenotype. We established a method of freeze-thaw injury of the infrarenal aorta producing a limited tissue necrosis and histologically investigated the occurrence of dystrophic calcification within the aortic wall 1, 3 and 7 days after injury in C57BL/6 (a mouse strain shown to be resistant to dystrophic cardiac calcification after injury) and C3H/He (susceptible to dystrophic cardiac calcification). C57BL/6 mice exhibited no dystrophic calcification at all within the vessel wall upon injury of the infrarenal aorta (0/5 mice 1 day after injury and 0/10 animals 7 days after injury). By contrast C3H/He mice displayed a remarkable extent of calcification mainly present within the media of the infrarenal aorta which was evident as early as 24 h (three out of five animals 1 day after injury) and reached its maximum extent 7 days after injury (10 out of 10 animals at the seventh postoperative day, p<0.001 compared to C57BL/6 mice). Upon immuno-histological analysis calcification was accompanied by the occurrence of certain bone-matrix associated proteins. Osteopontin and Bone Morphogenetic Protein 2/4 expression was detected co-localized with the calcified lesions. Our results demonstrate that freeze-thaw injury of the infrarenal aorta is a sufficient method to induce dystrophic arterial calcification in mice. We present evidence that the occurrence of arterial calcification in C3H/He mice seems to be actively regulated by certain bone-matrix associated proteins.
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Affiliation(s)
- Lars C Doehring
- Medizinische Klinik II, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.
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Tonelli M, Sacks F, Pfeffer M, Gao Z, Curhan G. Serum Phosphate: A Novel Cardiovascular Risk Factor Even in Nonrenal Patients. J Am Soc Nephrol 2006. [DOI: 10.1681/asn.2006060608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Bibliography. Current world literature. Mineral metabolism. Curr Opin Nephrol Hypertens 2006; 15:464-7. [PMID: 16775463 DOI: 10.1097/01.mnh.0000232889.65895.ae] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Evan A, Lingeman J, Coe FL, Worcester E. Randall's plaque: Pathogenesis and role in calcium oxalate nephrolithiasis. Kidney Int 2006; 69:1313-8. [PMID: 16614720 DOI: 10.1038/sj.ki.5000238] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The purpose of these studies was to test the hypothesis that Randall's plaque develops in unique anatomical sites of the kidney and their formation is conditioned by specific stone-forming pathophysiologies. We performed intraoperative papillary biopsies from kidneys of idiopathic-calcium oxalate (CaOx), intestinal bypass for obesity, brushite (BR) and cystine stone formers (SF) during percutaneous nephrolithotomy. Tissues were examined by infrared analysis and light and electron microscopy. Our analysis revealed a distinct pattern of mineral deposition and papillary pathology for each type of SF. CaOx SF had interstitial apatite crystals beginning at thin loops of Henle. These deposits termed Randall's plaque are thought to serve as sites for stone attachment. No tubular injury was noted. Intestinal bypass patients possessed intraluminal apatite deposits in inner medullary collecting ducts (IMCD) with associated cell injury. BR SF showed the most severe form of cortical and medullary changes with sites of Randall's plaque, and yellowish intraluminal deposits of apatite in IMCD. Cystine SF had plugging of ducts of Bellini with cystine crystals and apatite deposits in IMCD and loops of Henle. Intratubular sites of crystalline deposits were always associated to adjacent regions of interstitial fibrosis. The metabolic, anatomic, and surgical pathologic findings in four distinct groups of SF clearly show that 'the histology of the renal papilla from a stone former, is particular to the clinical setting'. We believe our approach to studying stone disease will provide insights into the pathogenesis of stone formation for each type of SF that will lead to improved clinical treatment.
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Affiliation(s)
- A Evan
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, 46220, USA.
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