Serum apelin is associated with affective disorders in peritoneal dialysis patients

Objective: Depression and anxiety are prevalent affective disorders in peritoneal dialysis (PD) patients. Recent research has proposed a potential role of apelinergic system in pathogenesis of depression. The present study aimed to evaluate the frequency of depression and anxiety and their potential relation with serum apelin levels among PD patients.

Methods: A total of 40 PD patients were enrolled into the study. Depressive symptoms and anxiety were assessed with the Beck’s Depression Inventory and the Beck’s Anxiety Inventory. Serum apelin-12 levels were measured by immunoenzymatic assays using commercially available ELISA kit for standard human apelin.

Results: Of the patients, 16 (40%) had depression, 20 (50%) had anxiety. The patients with depression and anxiety had a significantly longer time on dialysis (p?<?0.001 for both), significantly higher serum apelin (p?<?0.001 for both) and C-reactive protein levels (p?<?0.001 for both) than those without depression and anxiety. In multivariate analysis, serum apelin was the only parameter associated independently with depression and anxiety scores.

Conclusions: A substantial number of PD patients had depression and anxiety. Increased levels of serum apelin may constitute a significant independent predictor of development of depression and anxiety in PD patients.     

Treatment of Acute Rejection

Abstract

Background: Cardiovascular disease (CVD) is the most important cause of morbidity and mortality in patients with end stage renal disease (ESRD). Apelin expressed in endothelial and other tissues including brain and kidney is an adipocytokine defined recently and is emerging an important mediator of cardiovascular homeostasis. The aim of this study was to test whether apelin levels might be associated with carotid artery atherosclerosis and left ventricular mass index (LVMI) in peritoneal dialysis patients. Patients and methods: Fifty peritoneal dialysis patients (25 female, mean age 41.4?±?11.9 years, mean dialysis vintage 65.0?±?35.4 months) and 18 healthy individuals (9 female, mean age 41.7?±?6.8 years) were included in this cross-sectional study. Serum apelin 12 levels, echocardiographic findings and carotid intima media thickness (CIMT) were recorded as well as clinical and laboratory data. Results: There were no differences between the patient and the control groups with regard to demographic characteristics. In patient group, LVMI, CIMT, CRP and apelin levels were elevated compared to control group. However there was no association between apelin, LVMI and CIMT. There was a positive correlation between apelin and CRP, which was not statistically significant. When patients were divided into two groups according to the mean serum apelin levels, LVMI, CIMT and CRP were higher in the high apelin group but this difference did not reach statistical significance. Conclusion: We observed an increased inflammation and CVD risk in peritoneal dialysis patients. However, serum apelin levels seem not to be associated with cardiovascular risk in this group of patients.     

The Relationship between Apelin and Parathyroid Hormone in Hemodialysis Patients

Both apelin and parathyroid hormone (PTH) are endogenous ligands for G-protein-coupled receptors. Apelin acts as a mitogenic agent for osteoblasts, and metabolic bone abnormalities are frequently seen in hemodialysis (HD) patients because of hyperparathyroidism. The aim of this study was to analyze plasma apelin levels in HD patients and to determine whether they are related to PTH concentrations. A total of 23 HD patients [15 men and 8 women, with a mean (SD) age of 54.2 (4.4) years and a mean body mass index (BMI) of 25.0 (4.1) kg/m²] were studied and compared with 15 healthy subjects [6 men and 9 women, with a mean (SD) age of 51.3 (13.6) years and a BMI of 27.0 (4.3) kg/m²]. Plasma apelin-36 was measured using an enzyme immunometric assay method and PTH was measured by ELISA. There was no significant difference in apelin levels between the patients [0.80 (0.6) ng/mL] and the healthy subjects [0.83 (0.23) ng/mL]. There was a positive correlation between apelin and PTH (r = 0.66, p = 0.0001). The patients with PTH >300 pg/mL had significantly higher plasma apelin levels [1.17 (0.7) ng/mL] compared with the patients with PTH <300 pg/mL [0.50 (0.15) ng/mL] (p = 0.003). In conclusion, HD patients with secondary hyperparathyroidism have high plasma apelin levels, which suggest that apelin may protect bone in HD patients by acting as an osteoblastic factor.     

Body mass index as a predictor of continued survival in older chronic dialysis patients

Objective: To investigate the contribution of body mass index (BMI) to mortality over 11 years of follow-up in a prevalent sample of dialysis patients aged 60+. Design: Multivariate Cox proportional hazards regression analysis. Setting: Multicenter stratified random sample of black and white older chronic dialysis patients in a southeastern state. Subjects: 316 patients on hemodialysis (HD) and peritoneal dialysis (PD). Main outcome measure: Continued survival from baseline interview in 1988 to June1999. Results: Adjusting for age, primary diagnosis of diabetes, cardiovascular comorbidity, HD/PD therapy, and patient-reported functional impairment, the interaction of baseline BMI with race and gender was associated with older patients' risk of mortality. Black females, black males, and white males with higher BMI had a reduced risk of mortality, while no protective effect of higher BMI was found for white females. Patients with cardiovascular comorbidity and greater functional impairment at baseline had increased mortality risk. BMI was not significantly correlated with serum albumin or functional impairment. Conclusion: BMI, a simple anthropometric measure that provides a marker of nutritional status,interacts with race and gender to predict long-term survival in older dialysis patients. The association of survival with dialysis adequacy,nutritional indicators, and cardiovascular status in black and white dialysis patients is an important area of study. This revised version was published online in September 2006 with corrections to the Cover Date.     

Brain Natriuretic Peptide and Its Relationship to Left Ventricular Hypertrophy in Patients on Peritoneal Dialysis or Hemodialysis Less Than 3 Years

An increase of brain natriuretic peptide (BNP) levels is commonly observed in patients on dialysis. Increased circulating levels of BNP are related to future cardiac events and associated with shorter survival in patients on chronic hemodialysis (HD). During the first 1 or 2 years on dialysis, patients on peritoneal dialysis (PD) have been shown to have an improvement in left ventricular hypertrophy, blood pressure, and volume status. This study compares BNP levels and cardiac status of PD and HD patients without cardiovascular disease and on dialysis for less than 36 months. The correlation between plasma BNP concentration and findings of echocardiography before HD scans were examined and compared with findings of PD. Twenty-two HD patients (15 men, 7 women; mean age, 52.5 ± 13.9 years) and 19 PD patients (10 men, 9 women; mean age, 47.6 ± 11.3 years) were studied. There were no significant differences between HD and PD patients with regard to age, gender, duration of dialysis, left ventricular mass, left ventricular mass index (p > 0.05). Plasma BNP levels were markedly greater in HD patients (467.8 ± 466.5 pg/mL) than those of PD patients (143.1 ± 165.2 pg/mL). Urine output was significantly higher in PD patients compared with HD patients (p < 0.05). A positive correlation between systolic blood pressure, diastolic blood pressure, and plasma BNP in HD patients (r: 0.653, p: 0.001; r: 0.493, p: 0.023, respectively) was detected. Additional studies are needed to investigate whether lower BNP level in PD patients is an advantage.     

腹膜透析和血液透析对难治性心衰患者睡眠和生活质量的影响

目的探讨腹膜透析(peritoneal dialysis,PD)和血液透析(hemodialysis,HD)对难治性充血性心力衰竭(refractory congestive heart failure,RCHF)患者睡眠质量和生活质量的影响。方法回顾分析2010年01月1日至2017年12月31因RCHF在南京大学医学院附属南京鼓楼医院肾脏科接受PD(31例)或HD(17例)治疗患者的临床和随访资料。收集患者透析前和6个月后临床、实验室检查资料、简明健康调查问卷(the MOS item short from health survey,SF-36)和匹兹堡睡眠质量指数量表(Pittsburgh sleep quality index,PSQI)数据,通过自身前后对照比较两种治疗方式对患者临床、实验室指标以及睡眠和生活质量的影响,Logistic回归分析透析方式对患者生活质量的影响。结果两组患者临床心功能分级和B型脑钠肽水平在治疗后均较治疗前显著改善(P<0.01),两种治疗方式间比较无显著差异(P>0.05);两组患者左心射血分数在治疗后均无明显改善(P>0.05)。HD患者除在催眠药和日间功能障碍外,其他5项睡眠质量指标均有显著改善(P<0.05),PD治疗患者除在催眠药外,其他6项睡眠质量指标均有显著改善(P<0.05)。两种治疗方式均显著改善患者PSQI总分值(P<0.05),两种治疗方式间比较PSQI总分值无显著差异(P>0.05)。HD对除情感职能外的其他7项生活质量指标均有显著改善作用(P<0.01);PD对全部8项生活质量指标均有显著改善(P<0.01)。治疗6个月后,除生理功能外,PD在其他生活质量指标均好于HD(P<0.05)。Logistic回归显示PD与患者更好的生理职能和情感职能相关(P<0.01)。结论PD与HD一样可改善RCHF患者近期的临床症状和睡眠质量,但PD生活质量改善上优于HD。     

Health-related quality of life in pediatric patients with ESRD

As part of creating a pediatric ESRD-specific Health-Related Quality of Life (HRQOL) assessment instrument, we established pilot data with the PedsQL 4.0 Generic Core Scales in 96 pediatric patients with ESRD receiving hemodialysis (HD), peritoneal dialysis (PD) or with a renal transplant (TX). Patient age ranges were: 2–4 (8; PD n=3, TX n=5), 5–7 (12; HD n=9, TX n=3), 8–12 (25; HD n=5, PD n=6, TX n=14), 13–18 (51; HD n=18, PD n=10, TX n=23). PedsQL ESRD data were compared to healthy children (n=131 child report; n=145 parent report) and across HD/PD/TX. For all domains, ESRD patient HRQOL scores were significantly lower than healthy controls. Transplant patients reported better physical and psychosocial health than dialysis patients. No difference was noted between HD and PD patients for any PedsQL domain. Our data demonstrate that the PedsQL 4.0 Generic Core Scales is a useful measurement instrument to screen for HRQOL impairment in pediatric patients with ESRD. We suggest that the ESRD-specific HRQOL instrument in development is needed to help define condition-specific HRQOL differences between modalities.     

Leptin and plasminogen activator inhibitor-1 levels in children on chronic dialysis

Abstract

Purpose: In this study, it is aimed to compare the serum leptin and PAI-1 levels and evaluate their relationship in children on hemodialysis (HD) and peritoneal dialysis (PD). Method: Thirty-six patients on HD (mean age: 15.0?±?2.8 years), 19 patients on PD (mean age: 13.0?±?3.5 years) and 15 healthy subjects (mean age: 14.5?±?2.7 years) were included in the study. Laboratory investigations included blood count, biochemical parameters, serum iron, iron binding capacity, parathormone, erythrocyte sedimentation rate, C-reactive protein (CRP), prothrombin time (PT), partial thromboplastin time (PTT), fibrinogen, serum leptin and PAI-1 levels. Results: Serum leptin levels were significantly higher in HD group than in control group when the effects of BMI and sex were controlled, while PD and control groups had similar leptin levels. PAI-1 levels were also significantly higher in HD group than in control group, while there was no statistically significant difference in PAI-1 levels of PD and control group. PAI-1 levels and leptin levels were significantly correlated, which was independent of the effect of BMI in both HD and PD groups when they are evaluated separately. Conclusion: Results of our study showed that HD patients had higher leptin and PAI-1 levels and leptin and PAI-1 levels were correlated significantly in both patient groups. The effect of elevated serum leptin and PAI-1 levels on the cardiovascular complications remains to be established.     

Serum indoleamine 2,3 dioxygenase and tryptophan and kynurenine ratio using the UPLC-MS/MS method,in patients undergoing peritoneal dialysis,hemodialysis, and kidney transplantation

Background: The level and activity of indoleamine 2,3-dioxygenase (IDO) and the concentrations of L-tryptophan and its metabolite L-kynurenine were determined in association with various renal diseases. However, there have been no data regarding these parameters in patients on peritoneal dialysis compared to those undergoing hemodialysis or kidney transplantation.

Methods: This study investigated the level and activity of IDO and determined oxidative balance by calculating the total oxidant status (TOS), total antioxidant status (TAS), and oxidative stress index (OSI). We enrolled 60 kidney disease patients, including 20 on peritoneal dialysis (PD group), 19 on hemodialysis (HD group), and 21 with kidney transplantation (KT group), as well as 21 control group.

Results: IDO levels were increased in the PD, HD, and KT groups compared to the control group. The concentration of kynurenine was significantly increased in the PD group compared to the other groups (p?p?p?Conclusion: The results showed that IDO levels were increased in peritoneal dialysis and hemodialysis patients and in renal transplant recipients, while oxidative stress was found to be related to IDO activity and was most increased in the patients on peritoneal dialysis.     

Type of arteriovenous fistula,NYHA class and apelin in hemodialyzed patients

Apelin, a newly discovered adipocytokine, is produced by white adipose tissue and also expressed in kidney and heart. Increasing evidence suggests a role for apelin in the pathology of the cardiovascular system. It was demonstrated that apelin may contribute to the pathophysiology of human chronic heart failure. Apelin locates at the endothelium—a site of key functional importance in the kidney, and apelin has been shown to increase cardiac output. Cardiovascular disease is a major contributor to the mortality and morbidity of patients with chronic renal failure. We previously found that apelin was significantly lower in dialyzed patients with coronary artery disease and its level was predicted by cardiac function. Creation of a-v fistula might contribute to the development or worsening of chronic heart failure. The aim of this study was to assess associations between apelin, other adipocytokines, NYHA class and location of a-v fistula in hemodialyzed patients. This cross-sectional study was performed on a cohort of one hundred, clinically stable hemodialyzed patients. We investigated plasma apelin as well other adipocytokines: resistin, visfatin and von Willebrand factor (vWF)—a marker of endothelial cell injury. In patients with a-v fistula on the forearm (n = 77), apelin was significantly higher than in patients with a-v fistula on the arm (n = 23) (56.79 ± 23.56 vs. 43.12 ± 23.19 pg/ml). Patients with forearm a-v fistula had lower left ventricular internal end-diastolic dimension (LVIDd) (P < 0.05), left ventricular internal end-systolic dimension (LVISd) (P < 0.05), NYHA class (P < 0.05), hsCRP (P < 0.01), plasma vWF (P < 0.01), and plasma resistin (P < 0.05), whereas the ejection fraction was higher than in patients with arm a-v fistula (P < 0.05), as well as hemoglobin (P < 0.05), hematocrit (P < 0.01), prevalence of diabetes (n < 0.05), prevalence of coronary heart disease (P < 0.05), serum pH (P < 0.05), serum bicarbonate (P < 0.05). Apelin was related to echocardiographic parameters, presence of diabetes, coronary artery disease, chronic heart failure, NYHA class and serum lipids (total cholesterol, LDL, triglycerides), hsCRP, vWF, residual renal function, and Kt/V. In multiple logistic regression analysis, apelin was significantly associated with ejection fraction (beta value was −0.51, P = 0.007), the presence of diabetes (beta value 0.39, P = 0.049), a-v fistula arm location (beta value 0.42, P = 0.047). Multiple adjusted r ² for variables in the equation = 0.45, F = 1.75, P = 0.04, SE of estimate = 20.85. Apelin level in dialyzed patients is predicted by cardiac function, presence of diabetes and location of a-v fistula. Apelin might be involved in the pathophysiology of cardiovascular disease in chronic renal failure. The arm location of the fistula might contribute to the development or the worsening of chronic heart failure in hemodialyzed patients.     

Serum VCAM-1, ICAM-1, and L-selectin levels in children and young adults with chronic renal failure

Children and young adults with chronic renal failure (CRF) present with an impaired immune response. Our aim was to analyze whether leukocyte migration, determined by adhesion molecules, is disturbed in the course of CRF, hemodialysis (HD), and peritoneal dialysis (PD). Soluble (s) VCAM-1, ICAM-1, and L-selectin serum levels were evaluated by ELISA in 15 patients with CRF, 22 patients on cuprophane membrane HD, 24 patients on PD, and in 15 controls. The sVCAM-1 levels in all groups were significantly elevated compared with controls. The levels in HD patients were higher than in CRF patients (P <0.05), while levels in PD patients were higher than in CRF and HD (P <0.001 and P <0.01, respectively). The sICAM-1 concentrations in CRF and PD patients were significantly elevated compared with controls (P <0.001 and P <0.0001, respectively); in PD patients sICAM-1 levels were higher than in HD patients (P <0.001), but there were no differences between other groups. sL-selectin levels were decreased in all groups compared with controls. The levels in HD patients were the lowest and the differences, compared with CRF and PD patients, were significant (P <0.05 and P <0.01, respectively). Children and young adults with CRF and on maintenance dialysis have altered concentrations of soluble adhesion molecules, resulting from either inadequate clearance or disturbed synthesis and release. The differences in sVCAM-1 levels between CRF and both groups of patients on dialysis, as well as the differences in sL-selectin concentrations between HD and CRF patients, indicate that these disturbances are aggravated by maintenance dialysis, particularly HD.     

The Prevalence of Left Ventricular Hypertrophy in Chinese Hemodialysis Patients Is Higher Than That in Peritoneal Dialysis Patients

Background. Left ventricular hypertrophy (LVH) is common in dialysis patients, and an independent predictor of mortality. While recent studies have shown no differences in mortality between the two most common dialysis modalities, hemodialysis (HD) and peritoneal dialysis (PD), their impact on LVH is controversial. We thus performed cardiac ultrasound studies in prevalent dialysis patients receiving either HD or PD and compared LVH. Methods. We included 48 HD and 62 PD patients receiving treatment for at least three months in our dialysis center. All patients underwent echocardiographic examination and blood pressure measurements immediately following therapy. Volume status was assessed by bioelectrical impedance analysis. Results. There was no baseline difference in demographics or comorbidities between HD and PD patients. As expected, extracellular water (ECW) in post-HD patients was significantly lower than that in pre-HD and PD patients, while cardiac output (CO) and systolic blood pressure (SBP) were higher in pre-HD than that in post-HD or PD patients. There was no significant difference in CO or SBP between post-HD and PD patients. Left ventricular mass index (LVMI) was markedly higher in HD patients as compared to PD patients. Thus, the prevalence of LVH according to the Framingham criteria was 68.8% in HD patients and 45.2% in PD patients. Subgroup analysis showed similar results in the patients who had been on single-modality dialysis for at least two years and in the anuric patients. Finally, in a linear regression model (r² = 0.364, p < 0.001), SBP, treatment modality (to be in HD), and ECW were all independent predictors of LVMI. Conclusions. In a cross-sectional analysis of prevalent Chinese patients, we found a higher LVMI and a higher prevalence of LVH in HD than in PD patients. As LVMI was associated with high blood pressure and volume overload, we suggest that in these patients, PD may preserve more physiological hemodynamics even during long-term therapy.     

Transfusion and recombinant human erythropoietin requirements differ between dialysis modalities

Background: Before the routine use of recombinant human erythropoietin (rHuEpo), patients dialysed by peritoneal dialysis (PD) received fewer blood transfusions than patients on haemodialysis (HD). We compared transfusion practices in these groups now that the use of rHuEpo has become standard, while controlling for variables known to influence anaemia of end-stage renal disease (ESRD). Maintenance rHuEpo doses were also compared. Methods: Data were examined for 157 HD and 126 PD patients during a 2-year period. Potential confounders included age, gender, albumin, iron deficiency, parathyroid hormone (PTH), underlying renal disease, cormorbid illness, renal transplant, dialysis adequacy and duration. An intent-to-treat analysis was used, with sensitivity analyses to account for change in treatment and transplant. Results: Mean haemoglobin (Hb) was not different (10.47 g/dl for HD, 10.71 G/DL for PD; P=0.45). Mean monthly transfusion rate was higher for HD (0.47 units per month vs 0.19; P<0.01). More HD patients received at least one transfusion (52.9 vs 40.9%; P<0.01). The maintenance rHuEpo dose was higher for HD (7370 U/week vs 5790 U/week; P=0.01). The only factors associated with risk of being transfused were dialysis duration and mode of dialysis (less risk for PD, odds-ratio 0.57; 95% confidence interval 0.35-0.92). Conclusions: Despite the routine use of rHuEpo, HD patients received more blood and rHuEpo than PD patients to achieve the same Hb. No patient factors were identified to account for this difference. The use of fewer transfusions and less rHuEpo in PD represents an advantage over HD in terms of both cost and safety.     

Stroke-free status and depression scores among Saudi dialysis patients

Abstract

Background: To assess the prevalence of stroke symptoms and depression among Saudi dialysis patients and related factors. Methods: This is a cross-sectional multicentre study of Saudi dialysis patients. Demographics, clinical and laboratory’s data were collected. Freedom from stroke symptoms was assessed using the Questionnaire for Verifying Stroke-Free Status and depression using the Geriatric Depression Scale. Results: Five-hundred and forty-nine patients (77.3% response rate); 94.6% were receiving hemodialysis and 5.4% peritoneal dialysis were included in the study. Freedom from stroke was reported in 76.6% of patients, was higher in females (p?=?0.07), and was not affected by the presence of diabetes mellitus coronary artery disease or peripheral vascular disease. However, it was significantly lower in hypertensive patients (p?=?0.035) and was not affected by age, dialysis duration, Kt/V, albumin or hemoglobin levels. It was, however, more prevalent in the non-depressed patients compared to depressed patients (p?=?0.036). Mild and major depression scores were noted in 45.2% and 6.1%, respectively; the depression score being significantly higher in HD than in PD patients (6.3?±?3.4 vs. 5.0?±?3.2 p?=?0.049) but was not related to sex, employment, vascular access type, age, dialysis duration, Kt/V or serum albumin or hemoglobin levels. Conclusion: A quarter of the patients were not stroke symptom-free and these were more likely the depressed patients, in females, but significantly less in hypertensive patients. Almost half of the patients were depressed with 6.1% having major depression. The depression score was significantly higher in HD than in PD patients.     

Comparison of nutritional status in hemodialysis patients with and without failed renal allografts

Yelken MB, Gorgulu N, Caliskan Y, Yazici H, Turkmen A, Yildiz A, Sever MS. Comparison of nutritional status in hemodialysis patients with and without failed renal allografts
Clin Transplant 2010: 24: 481–487.
© 2009 John Wiley & Sons A/S. Abstract: Background: The survival of patients returning to hemodialysis (HD) following kidney transplant failure is unfavorable. However, the factors responsible for this poor outcome are largely unknown; chronic inflammation due to failed allograft and malnutrition may contribute to morbidity and mortality. We aimed to compare the nutritional status and its relation with inflammation in patients on HD with and without previous kidney transplantation. Methods: Forty‐three patients with failed renal allografts (27 males; mean age 36 ± 9 yr) and 40 never transplanted HD patients (24 males; mean age 39 ± 9 yr) were included in the study. Body weight, triceps (TSF), biceps (BSF), subscapular (SSSF), and suprailiac skinfold thicknesses (SISF); mid‐arm, mid‐arm muscle, hip and waist circumferences; as well as body mass indices (BMIs) were determined as anthropometric parameters. Moreover, biochemical markers of nutritional status, including serum cholesterol and albumin as well as high‐sensitive C‐reactive protein (hs‐CRP), as a marker of inflammation, were measured. Associations among these variables were analyzed. Results: There were no significant differences considering age, gender or duration of renal replacement therapy between the two groups. The TSF (p < 0.0001), BSF (p = 0.005), SSSF (p = 0.001), SISF (p < 0.0001) skinfold thicknesses; mid‐arm (p = 0.003) and mid‐arm muscle circumferences (p = 0.037) and BMIs (p = 0.001) of the patients with failed renal allografts were significantly lower than those of the never transplanted HD patients. Waist circumference was significantly lower as well (p = 0.028). Patients with failed transplants were characterized by lower serum albumin (p < 0.0001) and higher hs‐CRP levels (p = 0.001) as compared with never transplanted HD patients. Conclusions: This study confirms the concept that retained failed allografts may induce chronic inflammation in chronic HD patients which may result in a worse nutritional status.     

Relationship between geriatric nutritional risk index and subpopulation lymphocyte counts in patients undergoing hemodialysis and peritoneal dialysis

We investigated the relationship between geriatric nutritional risk index (GNRI) and subpopulation lymphocyte counts (SLCs) in hemodialysis (HD) and peritoneal dialysis (PD) patients and evaluated whether they can be helpful in the diagnosis of malnutrition in these patients. We examined the GNRI and SLCs of 50 HD patients (mean: 55.8?±?12.7 years; 28 men and 22 women) and 16 Continuous Ambulatory Peritoneal Dialysis (CAPD) patients (mean: 49.8?±?14.5 years; 10 men and six women). The GNRI is calculated based on the serum albumin level, dry weight, and ideal body weight and uses the following equation: GNRI?=?[14.89?×?albumin (g/dL)]?+?[41.7?×?(weight/ideal body weight)]. SLCs were evaluated using flow cytometry. T-tests and χ² tests were performed to compare the two groups. Logistic regression analysis was performed for predicting malnutrition in dialysis patients. The average GNRI value was 100.1?±?8.4 in HD patients and 99.2?±?8.1 in PD patients, and no significant differences in GNRI or SLC were observed between the two groups. SLCs were higher in patients with higher GNRI (GNRI?≥?100) although there was no statistical difference. Logistic regression for predicting malnutrition according to GNRI revealed that age, female sex, and CD19 counts predicted malnutrition in HD and PD patients. These results suggest that GNRI and SLCs (especially CD19 count) may be significant nutritional markers in these patients.     

Platelet Activity and Serum Homocysteine Levels in Patients with End-Stage Renal Failure with Regard to Dialysis Modality

Background. Recent evidence suggests that the activation of platelets and their interaction with circulating cells are important independent risk factors for atherosclerosis. In non-uremic patients with symptomatic peripheral vascular disease, a relationship between serum homocysteine (Hcy) levels and platelet activity had been reported. The purposes of this study were to evaluate of effects of dialysis modality on platelet activity in patients with end-stage renal failure and to investigate the relationship between platelet activity, Hcy, and left ventricular hypertrophy (LVH). Material and Methods. In age and sex matched 19 healthy subjects, 20 hemodialysis (HD) patients, and 18 continuous ambulatory peritoneal dialysis (CAPD) patients, the expression of platelet surface receptors CD41, CD61, CD42a, and CD62P were investigated. CD62P expression was statistically significantly increased in HD patients compared with CAPD patients and controls (34.4 ± 22.5%; 17.3 ± 19.6%, 12.0 ± 15.6%, respectively, p < 0.05), but not in CAPD patients compared with controls. There was a positive correlation between CD62 expression and duration of dialysis in HD patients (r = 0.498, p = 0.026). Mean plasma Hcy levels in dialysis patients were higher than reference levels. However, we could not find any relationship between CD62 expression, Hcy, and LVH in both groups (p > 0.05). Conclusions. Hemodialysis and peritoneal dialysis (PD) have a different impact on the expression of CD62: peritoneal dialysis seems to have a more favorable effect. It may be possible that the differences in biocompatibility between PD and HD potentially contribute to differences in CD62 expression.     

长期腹膜透析患者转归临床分析

目的研究长期腹透患者临床转归,分析其临床特点。方法对本院1994年1月至2003年8月腹透龄超过3年以上的58例腹透患者进行分析。根据其临床转归分为继续腹透组、转向移植组、转向血透组及死亡组。比较各组间近期营养指标（半年以内血清白蛋白水平）、近期透析充分性指标（Kt／V、Ccr）、水清除指标及残肾功能等临床特点。对死亡组同时做回顾性前后自身对照研究（死亡前半年以内与死亡前1年资料比较）。对继续腹透组回顾性分析比较1年前资料,并前瞻性追踪随访1年。结果死亡组总Kt／V显著低于其余3组（P〈0．05）;总Ccr显著低于继续腹透组（P〈0．01）。继续腹透组、移植组及血透组3组间总Kt／V、总Cer及血清白蛋白水平差异无统计学意义。血透组水清除指标显著低于继续腹透组及移植组;继续腹透组水清除指标稍高于死亡组但无显著性差异。死亡组近期总Kt／V显著低于死亡前1年总Kt／V（P〈0．05）;近期总Ccr显著低于死亡前1年总Ccr（P〈0．01）。继续腹透组近期总Kt／V及总Ccr与1年前及1年后指标比较差异均无统计学意义,但残肾Kt／V或残肾Ccr随时间推移而显著下降（P〈0．05）。继续腹透组残肾Kt／V或残肾Ccr显著高于死亡组及血透组（P〈0．05）。死亡组血清白蛋白水平较其余3组降低但差异无统计学意义。死亡组13例中有7例死于心脑血管疾病。结论腹透3年以上患者大部分仍可继续腹透。透析不充分是长期腹透患者死亡的重要原因。死亡的病因主要为心脑血管疾病。残肾功能可影响长期腹透患者的转归。     

Quantifying cognitive dysfunction across the spectrum of end‐stage kidney disease: A systematic review and meta‐analysis

Cognitive dysfunction is reportedly highly prevalent among chronic kidney disease (CKD) patients. A variety of screening tools and neuropsychiatric batteries are used to quantify the magnitude and nature of this dysfunction. Our objective is to summarize the neurocognitive testing used, and determine what degree cognitive dysfunction is reported in CKD patients. All study designs published in English that contained participants who were either pre‐dialysis patients, haemodialysis (HD) or peritoneal dialysis (PD) patients or renal transplant recipients were considered. Reported comparative non‐CKD control data was also collected. All study designs were included. The search period encompassed articles from 1980 to May 2018. This review is registered with PROSPERO (CRD42018096568). Of the 1711 articles screened, 148 articles were relevant and used in the meta‐analysis. Commonly used assessments were The Mini–Mental State Examination (MMSE), The Modified Mini–Mental State Examination, the Trails Making Tests (TMT) forms A and B and components of the Wechsler Adult Intelligence Scale: Digit Span and Digit Symbol. Means for all assessments were adjusted using a random effects model to account for the differences in variance. Adjusted mean MMSE scores were significantly lower for both pre‐dialysis (26.08, n = 17 073) and HD (26.31, n = 3314) patients when compared to non‐CKD controls (28.21, n = 5226). PD (58.01 s, n = 859) and HD (56.04 s, n = 2344) patients also took significantly longer to complete the Trails Making Task A than non‐CKD controls (37.62 s, n = 4809). Patients with CKD, especially pre‐dialysis and those requiring dialysis, are likely to exhibit impairments in cognition that can be identified with specific screening neuropsychological assessments.