Plasma levels of the pro-inflammatory protein S100A12 (EN-RAGE) are associated with muscle and fat mass in hemodialysis patients: a cross-sectional study
© Fukasawa et al.; licensee BioMed Central Ltd. 2014
Received: 17 January 2014
Accepted: 14 May 2014
Published: 27 May 2014
Malnutrition is highly prevalent and contributes to mortality in hemodialysis (HD) patients. Although the receptor for advanced glycation end products (RAGE) system also contributes to the morbidity and mortality of these patients, the role that the RAGE system plays in determining nutritional status is currently unknown.
A cross-sectional study examining 79 HD patients was performed. The plasma concentrations of the soluble RAGE (sRAGE) and S100A12 (also known as EN-RAGE) were studied to evaluate their association with nutritional status, which was assessed by measuring the mid-thigh muscle mass and subcutaneous fat mass with computed tomography.
Plasma S100A12 concentrations were shown to be significantly and negatively correlated with muscle mass and with fat mass (r = −0.237, P < 0.05 and r = −0.261, P < 0.05, respectively). In contrast, sRAGE was not shown to significantly correlate with either of these factors. Multiple regression analyses demonstrated that S100A12 is a significant independent predictor of both muscle mass and fat mass (P < 0.01 and P < 0.05, respectively).
Our findings suggest that plasma S100A12 levels could play an important role in determining muscle mass and fat mass in HD patients.
Study number; UMIN000012341.
KeywordsHemodialysis Malnutrition Protein-energy wasting S100A12 sRAGE
Protein-energy wasting (PEW), which is also referred to as malnutrition, is a condition caused by chronic kidney disease (CKD) and is characterized by decreased body stores of protein and energy sources . PEW is present in a large proportion of advanced CKD patients, in whom it has been associated with atherosclerotic cardiovascular disease (CVD), and it has been shown to lead to increased morbidity and mortality [2, 3]. Inadequate nutrition, inflammation, perturbations of appetite-controlling hormones, insulin resistance, enhanced proteolysis, and metabolic acidosis may contribute to the pathogenesis of PEW [4–6].
In the general population, overweight and obesity have been shown to be significant risk factors for cardiovascular and all-cause mortality . In contrast, a higher body mass index (BMI) is associated with decreased mortality and a reduced risk of hospitalization in hemodialysis (HD) patients [8, 9].
The receptor for advanced glycation end products (RAGE) has emerged as a central regulator of inflammatory processes . This multiligand receptor is expressed on the cell surface, where it can bind to various types of ligands, including S100/calgranulins, high-mobility group box 1 (HMGB1) and advanced glycation end products (AGEs) . The interactions between RAGE and its ligands activate pro-inflammatory genes, which can cause a wide range of inflammatory diseases, such as diabetic complications , rheumatoid arthritis , inflammatory bowel disease , and Alzheimer’s disease .
RAGE accumulates and exists in several forms in patients with decreased renal function [15, 16]. Soluble RAGE (sRAGE) is a circulating form of RAGE that is likely generated by the shedding of RAGE bound to the cell surface. sRAGE has been hypothesized to act as a decoy receptor by competitively inhibiting the binding of RAGE ligands to RAGE, thus attenuating downstream inflammatory responses . One protein that has been reported to be a ligand for RAGE is S100A12, which is also known as extracellular newly identified RAGE-binding protein (EN-RAGE). In contrast to sRAGE, S100A12 is a natural pro-inflammatory ligand for RAGE [18, 19]. By releasing pro-inflammatory cytokines, such as interleukin (IL)-1β and tumor necrosis factor (TNF)-α, S100A12 activates inflammatory responses [18, 20]. Moreover, it enhances the activation and migration of monocytes/macrophages. Consequently, S100A12 has been suggested to be an important contributor to the development of inflammatory processes, such as atherosclerosis [11, 20].
Several studies have reported associations between the RAGE system and CKD. For example, Kim et al.  reported that sRAGE is negatively associated with systemic inflammation and carotid atherosclerosis in peritoneal dialysis (PD) patients. In addition, Nakashima et al.  and Shiotsu et al.  reported that S100A12 might be a strong predictor for CVD and mortality in HD patients. However, the potential relationship between the AGEs-RAGE system and nutritional status has not been reported in any field, including CKD.
In this study, we report cross-sectional data from a well-characterized cohort of patients undergoing maintenance HD. In addition, we assess the relationships between plasma RAGE levels and nutritional status by measuring the areas of mid-thigh muscle and subcutaneous fat in these patients.
Materials and methods
Seventy-nine patients (53 men, 26 women) who had been undergoing HD at Iwata City Hospital (Shizuoka, Japan) were enrolled in this cross-sectional study. The causes of end-stage kidney disease were primary kidney diseases, such as chronic glomerulonephritis and nephrosclerosis in 65 patients (82%), polycystic kidney disease in six patients (8%), and overt diabetic nephropathy in 8 patients (10%). All patients had been subjected to regular HD for 4–5 hours three times per week at a blood flow rate of 180–240 ml/min. All patients used bicarbonate dialysate (Kindaly AF-2E®, Fuso, Osaka, Japan) at a dialysate flow rate of 500 ml/min. The study protocol was approved by the institutional ethics committee, and all patients provided informed consent before participating in the study.
Body weight was measured before and after each dialysis session, and the post-dialysis body weight of each patient was used as his or her dry weight (DW). BMI (kg/m2) was calculated by dividing the DW (kg) by the squared height (m).
Blood sampling and laboratory examinations
Blood samples were drawn at the beginning and end of the first dialysis session of the week, following a 2-day interval. Plasma samples were separated immediately and stored at -80ºC until analyzed. Serum electrolytes, urea nitrogen, creatinine (Cr), albumin, cholesterol, triglyceride, and C-reactive protein (CRP) levels were measured using standard laboratory techniques with an auto-analyzer. Plasma S100A12 and sRAGE levels were measured using enzyme-linked immunoassays (the CircuLex S100A12/EN-RAGE ELISA kit; CycLex, Nagano, Japan, and the Human RAGE Quantikine ELISA Kit; R&D Systems, Minneapolis, MN, USA, respectively). A single-pool urea kinetic model was used to calculate the protein catabolic rate and the delivered dialysis dose, [clearance of urea (K; mL/min) multiplied by the time on dialysis (t; min) divided by the volume of distribution for urea (Vurea; mL)], as described by Depner and Daugirdas .
Measurements of muscle and fat areas by computed tomography (CT)
Axial CT images of the thigh were obtained at the midpoint of a line extending from the superior border of the patella to the greater trochanter of the femur [25, 26]. Each patient was examined in the supine position with his or her thigh muscle relaxed. The thickness of each slice was 10 mm. Radiographic images were digitally scanned for analysis with a personal computer. The adipose-tissue-free thigh muscle area (TMA) and thigh subcutaneous fat area (TSFA) were measured using NIH-IMAGE, a public domain planimetry program available from the National Institutes of Health (written by Wayne Rasband, The National Institutes of Health, Bethesda, MD, USA). To avoid the potentially confounding influence of body size, we also standardized TMA and TSFA by dividing by DW (TMA/DW ratio and TSFA/DW ratio, respectively) .
Data were expressed as the mean ± standard deviation (SD) for continuous variables, with normal distributions or the median and interquartile range (25th to 75th percentiles) for data with skewed distributions. The threshold for statistical significance was set at P < 0.05. Comparisons between two groups were performed using the Mann–Whitney U-test, and comparisons between the three groups were made using the Kruskal-Wallis test. Spearman’s rank-order correlation analysis was used to evaluate the potential associations between TMA/DW, TSFA/DW, sRAGE, or S100A12 with the selected parameters. Multivariate regression analyses were used to assess the independent predictors of TMA/DW and TSFA/DW. All statistical analyses were performed using SPSS statistical software, version 19.0 (SPSS Inc., Chicago, IL, USA).
Total (n = 79)
Men (n = 53)
Women (n = 26)
67.0 (60.0 to 73.5)
68.0 (60.0 to 74.0)
65.5 (59.8 to 71.5)
Dialysis vintage, months
138.0 (43.5 to 268.0)
134.0 (40.0 to 267.0)
157.5 (85.8 to 282.5)
160.2 ± 8.8
164.2 ± 6.3
152.1 ± 7.5c
Dry weight, kg
50.7 ± 9.8
56.5 ± 9.4
43.5 ± 7.4c
20.5 ± 2.9
20.9 ± 2.8
19.6 ± 3.0a
Total protein, g/dL
6.4 ± 0.4
6.4 ± 0.4
6.4 ± 0.4
Serum albumin, g/dL
3.7 ± 0.4
3.6 ± 0.4
3.7 ± 0.4
Total cholesterol, mg/dL
152.1 ± 34.3
145.1 ± 33.9
166.3 ± 31.1a
LDL choresterol, mg/dL
85.2 ± 21.1
82.5 ± 21.4
90.8 ± 19.6
Blood urea nitrogen, mg/dL
62.6 ± 12.7
64.8 ± 10.9
58.2 ± 15.1a
Serum creatinine, mg/dL
10.8 ± 2.7
11.2 ± 3.0
9.8 ± 1.7b
9.4 ± 0.9
9.3 ± 0.9
9.7 ± 0.8
5.0 ± 1.3
5.1 ± 1.4
4.8 ± 1.2
Intact PTH, pg/mL
102.5 ± 107.4
90.5 ± 59.2
127.0 ± 166.6
26.7 ± 6.6
26.4 ± 6.6
27.3 ± 6.7
1.6 ± 0.3
1.5 ± 0.2
1.9 ± 0.3c
nPCR, g/kg/ideal body weight/day
0.97 ± 0.17
0.98 ± 0.15
0.94 ± 0.21
0.1 (0.0 to 0.3)
0.1 (0.1 to 0.4)
0.0 (0.0 to 0.1)
1550.4 (1005.3 to 2336.5)
1496.3 (950.0 to 2407.9)
1704.4 (1072.6 to 2240.6)
32.3 (22.4 to 53.5)
33.4 (24.1 to 56.9)
25.3 (18.6 to 39.3)
75.7 (62.7 to 95.2)
88.2 (69.0 to 99.7)
60.9 (54.8 to 72.6)c
TMA standardized for DW
1.53 (1.41 to 1.75)
1.57 (1.44 to 1.79)
1.45 (1.24 to 1.63)a
33.3 (23.2 to 47.2)
27.2 (19.6 to 40.8)
46.9 (31.1 to 59.4)c
TSFA standardized for DW
0.64 (0.47 to 0.87)
0.53 (0.42 to 0.67)
1.05 (0.75 to 1.39)c
No significant sex differences were observed with respect to the age, dialysis vintage, or serum albumin levels of the study participants. However, the patient height, DW, BMI, and serum Cr levels were all shown to be significantly greater in men than in women. In addition, TMA and TMA standardized for DW (TMA/DW) were both significantly greater in men than in women, whereas TSFA and TSFA standardized for DW (TSFA/DW) were significantly greater in women than in men. No significant differences in the levels of CRP, sRAGE, and S100A12 were observed between men and women.
Correlations between TMA/DW, TSFA/DW, sRAGE, and S100A12 levels and the clinical parameters
Correlations between TMA/DW, TSFA/DW, and Log sRAGE or Log S100A12 and Clinical Variables
Blood urea nitrogen
Determinants of potential biomarkers of muscle and/or fat mass
Multiple regression analysis with TMA standardized for DW or TSFA standardized for DW as the dependent variables and S100A12, Age, Sex, HD vintage, BMI, total cholesterol, and CRP as the independent variables
Dependent variable: TMA standardized for DW
Dependent variable: TSFA standardized for DW
Associations between TMA/DW, TSFA/DW and S100A12
Tertile 1 (<24.0)
Tertile 2 (24.0 to 44.0)
Tertile 3 (≥44.0)
TMA standardized for DW
1.63 ± 0.23
1.60 ± 0.29
1.42 ± 0.27
P < 0.05
TSFA standardized for DW
0.88 ± 0.48
0.72 ± 0.36
0.58 ± 0.22
P < 0.05
The primary finding of this study is that high plasma levels of S100A12 are independently associated with low mid-thigh muscle mass and low subcutaneous fat mass in HD patients, even after adjusting for potential confounding variables. To our knowledge, this study is the first to determine the role that the RAGE system plays in the nutritional status of patients with advanced CKD.
Advanced CKD patients often suffer from nutritional problems that are associated with increased morbidity and mortality . PEW is a term that has been proposed to describe the state of decreased body stores of protein and energy (i.e., muscle and fat mass) that occurs in CKD. In fact, HD patients have been reported to exhibit lower BMIs than age- and sex-matched control subjects from the general population . Based on this observation, several studies have shown that increased BMI contributes to survival advantages in dialysis patients [8, 9]. Because increased BMI has been associated with an increased risk of cardiovascular disease and all-cause mortality in the general population , this opposite relationship that is observed in dialysis patients is known as “risk factor paradox” or “reverse epidemiology” [29, 30].
In dialysis patients, increased serum Cr levels have been associated with improved survival, whereas lower serum Cr levels have been associated with increased mortality [31–33]. This finding suggests that low serum levels of Cr as a proxy for low muscle mass could be associated with adverse outcomes . Carrero et al.  also reported that muscle wasting measured by subjective global assessment (SGA) is associated with the increased mortality. These observations suggest that muscle mass is an important predictor of mortality in HD patients. However, increased fat mass has been associated with a lower risk of mortality and a reduced risk of hospitalization in HD patients . Moreover, Kakiya et al.  showed that a decrease in body fat is associated with an increased risk of death in these patients. Currently, it remains to be determined whether the survival advantage associated with higher BMI in dialysis patients is caused by increases in muscle mass, fat mass, or both. One reason that this question remains unanswered is because BMI cannot differentiate between weight changes caused by muscle mass alterations and weight changes resulting from fat mass or water weight . Previously, Beddhu et al.  attempted to investigate this issue using 24-hour urinary creatinine excretion as a surrogate for muscle mass. Based on their analysis, Beddhu and colleagues hypothesized that muscle mass might be a more important contributor to this survival advantage than fat mass. However, additional studies that directly measure muscle mass and fat mass are required to clarify this issue.
AGEs are generated as a result of chronic hyperglycemia and enhanced oxidative stress [38, 39]. AGEs were initially thought to be the primary active ligands for their receptors, such as RAGE, but several new ligands, including the high-mobility group box proteins, S100 proteins, and amyloid fibrils, have been recently identified . The binding of these ligands to RAGE induces oxidative stress, inflammation, and extracellular matrix accumulation [39, 41]. Because the plasma AGE level changes that are observed in CKD patients are relatively modest , ligands other than AGEs for RAGE may be more important in developing RAGE-mediated complications in CKD. For example, S100A12, which is also known as EN-RAGE, has been identified as an interesting pro-inflammatory ligand for RAGE that triggers the RAGE pathway. S100A12 activates key inflammatory signals, such as nuclear factor-κB (NF-κB), and it stimulates the production of pro-inflammatory cytokines, such as IL-1β and TNF-α [18, 20]. In contrast, sRAGE, which acts as a decoy receptor for RAGE ligands, suppresses RAGE-mediated inflammatory responses . Recently, several studies have focused on the pivotal role of RAGE signaling in patients with CKD [15, 21–23]. For example, sRAGE is negatively associated with systemic inflammation and with carotid intima-media thickness in PD patients . In addition, S100A12 has been shown to predict the cardiovascular and all-cause mortality in HD patients [22, 23]. In the present study, S100A12 was shown to be significantly and negatively associated with muscle mass and fat mass by both univariate and multivariate analysis, whereas no such relationships were observed for sRAGE. Thus, our study reveals the potential value of S100A12 as a predictor of nutritional status and provides clinical evidence regarding its possible role in the development of PEW in HD patients. In contrast, our data indicate that sRAGE levels are likely of limited clinical value in identifying PEW patients, although this possibility should be tested in a specifically designed clinical trial.
Another key finding from the present study is that the negative associations of S100A12 with muscle mass and fat mass both still remain significant even after adjusting for systemic inflammation (Table 3). As reported previously, systemic inflammation can cause a decrease in muscle mass because pro-inflammatory cytokines can contribute to anorexia, inhibit protein synthesis and promote catabolism . Adipose tissue is a well-known source of pro-inflammatory cytokines, and obese CKD patients have actually been shown to exhibit higher levels of inflammation [43, 44]. These findings highlight the difficulty of using inflammation as the sole explanation for the observed reductions of muscle and fat mass. Therefore, to clarify the influence of S100A12 on PEW in dialysis patients, we tried to adjust for the levels of systemic inflammation. Our analysis revealed that S100A12 is a direct predictor of muscle and fat mass independent of systemic inflammation. Previously, Hofmann et al.  demonstrated that S100A12 reduces cellular proliferation and increases H2O2 production via the NADPH oxidase system. Together, our results suggest that high levels of plasma S100A12 are associated with PEW via non-inflammatory mechanisms, such as oxidative stress. Further basic studies are warranted to clarify the precise role of this interesting ligand in determining nutritional status.
Our study has several limitations. First, due to the cross-sectional study design, a longitudinal causal relationship cannot be established between the changes in plasma S100A12 levels and alterations in muscle and/or fat mass. Second, because of the relatively small number of patients in our cohort, the generalizability of our conclusions remains unclear, and our data should be confirmed by larger studies.
S100A12 is significantly and negatively associated with both muscle mass and fat mass in HD patients. Our findings suggest that plasma S100A12 levels could play an important role in determining the nutritional status of HD patients. Future longitudinal observations and interventional studies are warranted to establish whether this link is causal in nature.
Advanced glycation end product
Body mass index
Chronic kidney disease
Extracellular newly identified RAGE-binding protein
High-mobility group box 1
Amount of dialysis delivered to each patient per treatment
Receptor for advanced glycation end products
Subjective global assessment
Thigh muscle area
TMA standardized for DW
Tumor necrosis factor
Thigh subcutaneous fat area
TSFA standardized for DW.
We thank Ms. Kozue Sakuma for measuring muscle and fat mass. This work was supported by grants from the Japanese Association of Dialysis Physicians (JADP Grant 2011–08, to H.F.) and the Japanese Kidney Foundation (JKF B11-70, to R.F.).
- Fouque D, Kalantar-Zadeh K, Kopple J, Cano N, Chauveau P, Cuppari L, Franch H, Guarnieri G, Ikizler TA, Kaysen G, Lindholm B, Massy Z, Mitch W, Pineda E, Stenvinkel P, Trevino-Becerra A, Wanner C: A proposed nomenclature and diagnostic criteria for protein-energy wasting in acute and chronic kidney disease. Kidney Int. 2008, 73: 391-398. 10.1038/sj.ki.5002585.View Article
- Qureshi AR, Alvestrand A, Danielsson A, Divino-Filho JC, Gutierrez A, Lindholm B, Bergstrom J: Factors predicting malnutrition in hemodialysis patients: a cross-sectional study. Kidney Int. 1998, 53: 773-782. 10.1046/j.1523-1755.1998.00812.x.View Article
- Stenvinkel P, Heimburger O, Paultre F, Diczfalusy U, Wang T, Berglund L, Jogestrand T: Strong association between malnutrition, inflammation, and atherosclerosis in chronic renal failure. Kidney Int. 1999, 55: 1899-1911. 10.1046/j.1523-1755.1999.00422.x.View Article
- Pickering WP, Price SR, Bircher G, Marinovic AC, Mitch WE, Walls J: Nutrition in CAPD: serum bicarbonate and the ubiquitin-proteasome system in muscle. Kidney Int. 2002, 61: 1286-1292. 10.1046/j.1523-1755.2002.00276.x.View Article
- Mak RH, Cheung W, Cone RD, Marks DL: Mechanisms of disease: cytokine and adipokine signaling in uremic cachexia. Nat Clin Pract Nephrol. 2006, 2: 527-534. 10.1038/ncpneph0273.View Article
- Carrero JJ, Nakashima A, Qureshi AR, Lindholm B, Heimburger O, Barany P, Stenvinkel P: Protein-energy wasting modifies the association of ghrelin with inflammation, leptin, and mortality in hemodialysis patients. Kidney Int. 2011, 79: 749-756. 10.1038/ki.2010.487.View Article
- Calle EE, Thun MJ, Petrelli JM, Rodriguez C, Heath CW: Body-mass index and mortality in a prospective cohort of U.S. adults. N Engl J Med. 1999, 341: 1097-1105. 10.1056/NEJM199910073411501.View Article
- Leavey SF, McCullough K, Hecking E, Goodkin D, Port FK, Young EW: Body mass index and mortality in ‘healthier’ as compared with ‘sicker’ haemodialysis patients: results from the dialysis outcomes and practice patterns study (DOPPS). Nephrol Dialy Transpl. 2001, 16: 2386-2394. 10.1093/ndt/16.12.2386.View Article
- Cabezas-Rodriguez I, Carrero JJ, Zoccali C, Qureshi AR, Ketteler M, Floege J, London G, Locatelli F, Gorriz JL, Rutkowski B, Memmos D, Ferreira A, Covic A, Teplan V, Bos WJ, Kramar R, Pavlovic D, Goldsmith D, Nagy J, Benedik M, Verbeelen D, Tielemans C, Wuthrich RP, Martin PY, Martinez-Salgado C, Fernandez-Martin JL, Cannata-Andia JB: Influence of body mass index on the association of weight changes with mortality in hemodialysis patients. Clin J Am Soc Nephrol. 2013, 8: 1725-1733. 10.2215/CJN.10951012.View Article
- Park S, Yoon SJ, Tae HJ, Shim CY: RAGE and cardiovascular disease. Front Biosci. 2011, 16: 486-497. 10.2741/3700.View Article
- Schmidt AM, Yan SD, Yan SF, Stern DM: The multiligand receptor RAGE as a progression factor amplifying immune and inflammatory responses. J Clin Invest. 2001, 108: 949-955. 10.1172/JCI200114002.View Article
- Foell D, Kane D, Bresnihan B, Vogl T, Nacken W, Sorg C, Fitzgerald O, Roth J: Expression of the pro-inflammatory protein S100A12 (EN-RAGE) in rheumatoid and psoriatic arthritis. Rheumatology. 2003, 42: 1383-1389. 10.1093/rheumatology/keg385.View Article
- Foell D, Kucharzik T, Kraft M, Vogl T, Sorg C, Domschke W, Roth J: Neutrophil derived human S100A12 (EN-RAGE) is strongly expressed during chronic active inflammatory bowel disease. Gut. 2003, 52: 847-853. 10.1136/gut.52.6.847.View Article
- Emanuele E, D’Angelo A, Tomaino C, Binetti G, Ghidoni R, Politi P, Bernardi L, Maletta R, Bruni AC, Geroldi D: Circulating levels of soluble receptor for advanced glycation end products in alzheimer disease and vascular dementia. Arch Neurol. 2005, 62: 1734-1736. 10.1001/archneur.62.11.1734.View Article
- Mori Y, Kosaki A, Kishimoto N, Kimura T, Iida K, Fukui M, Nakajima F, Nagahara M, Urakami M, Iwasaka T, Matsubara H: Increased plasma S100A12 (EN-RAGE) levels in hemodialysis patients with atherosclerosis. Am J Nephrol. 2009, 29: 18-24. 10.1159/000148646.View Article
- Basta G, Leonardis D, Mallamaci F, Cutrupi S, Pizzini P, Gaetano L, Tripepi R, Tripepi G, De Caterina R, Zoccali C: Circulating soluble receptor of advanced glycation end product inversely correlates with atherosclerosis in patients with chronic kidney disease. Kidney Int. 2010, 77: 225-231. 10.1038/ki.2009.419.View Article
- Park L, Raman KG, Lee KJ, Lu Y, Ferran LJ, Chow WS, Stern D, Schmidt AM: Suppression of accelerated diabetic atherosclerosis by the soluble receptor for advanced glycation endproducts. Nat Med. 1998, 4: 1025-1031. 10.1038/2012.View Article
- Hofmann MA, Drury S, Fu C, Qu W, Taguchi A, Lu Y, Avila C, Kambham N, Bierhaus A, Nawroth P, Neurath MF, Slattery T, Beach D, McClary J, Nagashima M, Morser J, Stern D, Schmidt AM: RAGE mediates a novel proinflammatory axis: a central cell surface receptor for S100/calgranulin polypeptides. Cell. 1999, 97: 889-901. 10.1016/S0092-8674(00)80801-6.View Article
- Yang Z, Tao T, Raftery MJ, Youssef P, Di Girolamo N, Geczy CL: Proinflammatory properties of the human S100 protein S100A12. J Leukoc Biol. 2001, 69: 986-994.
- Kosaki A, Hasegawa T, Kimura T, Iida K, Hitomi J, Matsubara H, Mori Y, Okigaki M, Toyoda N, Masaki H, Inoue-Shibata M, Nishikawa M, Iwasaka T: Increased plasma S100A12 (EN-RAGE) levels in patients with type 2 diabetes. J Clin Endocrinol Metabol. 2004, 89: 5423-5428. 10.1210/jc.2003-032223.View Article
- Kim JK, Park S, Lee MJ, Song YR, Han SH, Kim SG, Kang SW, Choi KH, Kim HJ, Yoo TH: Plasma levels of soluble receptor for advanced glycation end products (sRAGE) and proinflammatory ligand for RAGE (EN-RAGE) are associated with carotid atherosclerosis in patients with peritoneal dialysis. Atherosclerosis. 2012, 220: 208-214. 10.1016/j.atherosclerosis.2011.07.115.View Article
- Nakashima A, Carrero JJ, Qureshi AR, Miyamoto T, Anderstam B, Barany P, Heimburger O, Stenvinkel P, Lindholm B: Effect of circulating soluble receptor for advanced glycation end products (sRAGE) and the proinflammatory RAGE ligand (EN-RAGE, S100A12) on mortality in hemodialysis patients. Clin J Am Soc Nephrol. 2010, 5: 2213-2219. 10.2215/CJN.03360410.View Article
- Shiotsu Y, Mori Y, Nishimura M, Sakoda C, Tokoro T, Hatta T, Maki N, Iida K, Iwamoto N, Ono T, Matsuoka E, Kishimoto N, Tamagaki K, Matsubara H, Kosaki A: Plasma S100A12 level is associated with cardiovascular disease in hemodialysis patients. Clin J Am Soc Nephrol. 2011, 6: 718-723. 10.2215/CJN.08310910.View Article
- Depner TA, Daugirdas JT: Equations for normalized protein catabolic rate based on two-point modeling of hemodialysis urea kinetics. J Am Soc Nephrol. 1996, 7: 780-785.
- Ohkawa S, Odamaki M, Yoneyama T, Hibi I, Miyaji K, Kumagai H: Standardized thigh muscle area measured by computed axial tomography as an alternate muscle mass index for nutritional assessment of hemodialysis patients. Am J Clin Nutr. 2000, 71: 485-490.
- Kaizu Y, Ohkawa S, Odamaki M, Ikegaya N, Hibi I, Miyaji K, Kumagai H: Association between inflammatory mediators and muscle mass in long-term hemodialysis patients. Am J Kidney Dis. 2003, 42: 295-302. 10.1016/S0272-6386(03)00654-1.View Article
- Bergstrom J: Nutrition and mortality in hemodialysis. J Am Soc Nephrol. 1995, 6: 1329-1341.
- Kopple JD, Zhu X, Lew NL, Lowrie EG: Body weight-for-height relationships predict mortality in maintenance hemodialysis patients. Kidney Int. 1999, 56: 1136-1148. 10.1046/j.1523-1755.1999.00615.x.View Article
- Fleischmann EH, Bower JD, Salahudeen AK: Risk factor paradox in hemodialysis: better nutrition as a partial explanation. ASAIO J. 2001, 47: 74-81. 10.1097/00002480-200101000-00016.View Article
- Kalantar-Zadeh K, Block G, Humphreys MH, Kopple JD: Reverse epidemiology of cardiovascular risk factors in maintenance dialysis patients. Kidney Int. 2003, 63: 793-808. 10.1046/j.1523-1755.2003.00803.x.View Article
- Kalantar-Zadeh K, Streja E, Kovesdy CP, Oreopoulos A, Noori N, Jing J, Nissenson AR, Krishnan M, Kopple JD, Mehrotra R, Anker SD: The obesity paradox and mortality associated with surrogates of body size and muscle mass in patients receiving hemodialysis. Mayo Clin Proc. 2010, 85: 991-1001. 10.4065/mcp.2010.0336.View Article
- Walther CP, Carter CW, Low CL, Williams P, Rifkin DE, Steiner RW, Ix JH: Interdialytic creatinine change versus predialysis creatinine as indicators of nutritional status in maintenance hemodialysis. Nephrol Dial Transplant. 2012, 27: 771-776. 10.1093/ndt/gfr389.View Article
- Park J, Mehrotra R, Rhee CM, Molnar MZ, Lukowsky LR, Patel SS, Nissenson AR, Kopple JD, Kovesdy CP, Kalantar-Zadeh K: Serum creatinine level, a surrogate of muscle mass, predicts mortality in peritoneal dialysis patients. Nephrol Dial Transplant. 2013, 28: 2146-2155. 10.1093/ndt/gft213.View Article
- Carrero JJ, Chmielewski M, Axelsson J, Snaedal S, Heimburger O, Barany P, Suliman ME, Lindholm B, Stenvinkel P, Qureshi AR: Muscle atrophy, inflammation and clinical outcome in incident and prevalent dialysis patients. Clin Nutr. 2008, 27: 557-564. 10.1016/j.clnu.2008.04.007.View Article
- Johansen KL, Young B, Kaysen GA, Chertow GM: Association of body size with outcomes among patients beginning dialysis. Am J Clin Nutr. 2004, 80: 324-332.
- Kakiya R, Shoji T, Tsujimoto Y, Tatsumi N, Hatsuda S, Shinohara K, Kimoto E, Tahara H, Koyama H, Emoto M, Ishimura E, Miki T, Tabata T, Nishizawa Y: Body fat mass and lean mass as predictors of survival in hemodialysis patients. Kidney Int. 2006, 70: 549-556.View Article
- Beddhu S, Pappas LM, Ramkumar N, Samore M: Effects of body size and body composition on survival in hemodialysis patients. J Am Soc Nephrol. 2003, 14: 2366-2372. 10.1097/01.ASN.0000083905.72794.E6.View Article
- Bohlender JM, Franke S, Stein G, Wolf G: Advanced glycation end products and the kidney. Am J Physiol Renal Physiol. 2005, 289: F645-F659. 10.1152/ajprenal.00398.2004.View Article
- Yamagishi S, Maeda S, Matsui T, Ueda S, Fukami K, Okuda S: Role of advanced glycation end products (AGEs) and oxidative stress in vascular complications in diabetes. Biochim Biophys Acta. 1820, 2012: 663-671.
- Sparvero LJ, Asafu-Adjei D, Kang R, Tang D, Amin N, Im J, Rutledge R, Lin B, Amoscato AA, Zeh HJ, Lotze MT: RAGE (Receptor for Advanced Glycation Endproducts), RAGE ligands, and their role in cancer and inflammation. J Transl Med. 2009, 7: 17-10.1186/1479-5876-7-17.View Article
- Schmidt AM, Hori O, Cao R, Yan SD, Brett J, Wautier JL, Ogawa S, Kuwabara K, Matsumoto M, Stern D: RAGE: a novel cellular receptor for advanced glycation end products. Diabetes. 1996, 45 (Suppl 3): S77-S80.View Article
- Thornalley PJ, Rabbani N: Highlights and hotspots of protein glycation in end-stage renal disease. Semin Dial. 2009, 22: 400-404. 10.1111/j.1525-139X.2009.00589.x.View Article
- Ramos LF, Shintani A, Ikizler TA, Himmelfarb J: Oxidative stress and inflammation are associated with adiposity in moderate to severe CKD. J Am Soc Nephrol. 2008, 19: 593-599. 10.1681/ASN.2007030355.View Article
- Iglesias P, Diez JJ: Adipose tissue in renal disease: clinical significance and prognostic implications. Nephrol Dialy Transpl. 2010, 25: 2066-2077. 10.1093/ndt/gfq246.View Article
- Hofmann Bowman M, Wilk J, Heydemann A, Kim G, Rehman J, Lodato JA, Raman J, McNally EM: S100A12 mediates aortic wall remodeling and aortic aneurysm. Circ Res. 2010, 106: 145-154. 10.1161/CIRCRESAHA.109.209486.View Article
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.