MO060IMPACT OF ALTERED TRANSPORT CHARACTERISTICS ON PERITONEAL TISSUE PROFILES OF WATER AND SOLUTES IN CAPD PATIENTS WITH ULTRAFILTRATION FAILURE

Background In continuous ambulatory peritoneal dialysis (CAPD), the peritoneal membrane is continuously exposed to high-glucose-containing dialysis solutions. Abnormally high glucose concentration in the peritoneal cavity may enhance advanced glycosylation end-product (AGE) formation and accumulation in the peritoneum. Increased AGE accumulation in the peritoneum, decreased ultrafiltration volume, and increased peritoneal permeability in long-term dialysis patients have been reported. Aim The purpose of the study was to evaluate the relation between peritoneal membrane permeability and peritoneal accumulation of AGE. Methods Peritoneal membrane permeability was evaluated by peritoneal equilibration test (PET) using dialysis solutions containing 4.25% glucose. Serum, dialysate, and peritoneal tissue levels of AGE were measured by ELISA method using polyclonal anti-AGE antibody. Peritoneal biopsy was performed during peritoneal catheter insertion [new group (group N), n = 18] and removal [long-term group (group LT), n = 10]. Peritoneal catheters were removed due to exit-site infection not extended into the internal cuff ( n = 6) and ultrafiltration failure ( n = 4) after 51.6 ± 31.5 months (13 – 101 months) of dialysis. PET data obtained within 3 months after the initiation of CAPD or before catheter removal were included in this study. Ten patients in group N and 4 patients in group LT were diabetic. Patients in group LT were significantly younger (46.5 ± 11.1 years vs 57.5 ± 1.3 years) and experienced more episodes of peritonitis (3.5 ± 2.1 vs 0.2 ± 0.7) than group N. Results Peritoneal tissue AGE level in group LT was significantly higher than in group N, in both nondiabetic (0.187 ± 0.108 U/mg vs 0.093 ± 0.08 U/mg of hydroxyproline, p < 0.03) and diabetic patients (0.384 ± 0.035 U/mg vs 0.152 ± 0.082 U/mg of hydroxyproline, p < 0.03), while serum and dialysate levels did not differ between the groups in both nondiabetic and diabetic patients. Drain volume (2600 ± 237 mL vs 2766 ± 222 mL, p = 0.07) and D4/D0 glucose (0.229 ± 0.066 vs 0.298 ± 0.081, p < 0.009) were lower, and D4/P4 creatinine (0.807 ± 0.100 vs 0.653 ± 0.144, p < 0.0001) and D1/P1 sodium (0.886 ± 0.040 vs 0.822 ± 0.032, p < 0.0003) were significantly higher in group LT than in group N. On linear regression analysis, AGE level in the peritoneum was directly correlated with duration of CAPD ( r = 0.476, p = 0.012), number of peritonitis episodes ( r = 0.433, p = 0.0215), D4/P4 creatinine ( r = 0.546, p < 0.027), and D1/P1 sodium ( r = 0.422, p = 0.0254), and inversely correlated with drain volume ( r = 0.432, p = 0.022) and D4/D0 glucose ( r = 0.552, p < 0.0023). AGE level in the peritoneal tissue and dialysate were significantly higher in diabetics than in nondiabetics in group LT, while these differences were not found in group N. Serum AGE level did not differ between nondiabetics and diabetics in either group N or group LT. Drain volume and D4/D0 glucose were lower and D4/P4 creatinine and D1/P1 sodium higher in diabetics than in nondiabetics in both groups. Conclusion Peritoneal accumulation of AGE increased with time on CAPD and number of peritonitis episodes, and was directly related with peritoneal permeability. Peritoneal AGE accumulation and peritoneal permeability in diabetic patients were higher than in nondiabetic patients from the beginning of CAPD.

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Alterations of peritoneal transport characteristics in dialysis patients with ultrafiltration failure: tissue and capillary components

Nephrology Dialysis Transplantation ◽

10.1093/ndt/gfy313 ◽

2018 ◽

Vol 34 (5) ◽

pp. 864-870 ◽

Cited By ~ 4

Author(s):

Joanna Stachowska-Pietka ◽

Jan Poleszczuk ◽

Michael F Flessner ◽

Bengt Lindholm ◽

Jacek Waniewski

Keyword(s):

Transport Properties ◽

Capillary Wall ◽

Lymphatic Absorption ◽

Distributed Approach ◽

Peritoneal Transport ◽

Peritoneal Tissue ◽

Ultrafiltration Failure ◽

Spatially Distributed ◽

Transport Barriers ◽

The Individual

AbstractBackgroundUltrafiltration failure (UFF) in peritoneal dialysis (PD) patients is due to altered peritoneal transport properties leading to reduced capacity to remove excess water. Here, with the aim to establish the role of local alterations of the two major transport barriers, peritoneal tissue and capillary wall, we investigate changes in overall peritoneal transport characteristics in UFF patients in relation to corresponding local alterations of peritoneal tissue and capillary wall transport properties.MethodsSix-hour dwell studies using 3.86% glucose solutions and radioisotopically labelled serum albumin added to dialysate as a volume marker were analysed in 31 continuous ambulatory PD patients, 20 with normal ultrafiltration (NUF) and 11 with UFF. For each patient, the physiologically based parameters were evaluated for both transport barriers using the spatially distributed approach based on the individual intraperitoneal profiles of volume and concentrations of glucose, sodium, urea and creatinine.ResultsUFF patients as compared with NUF patients had increased solute diffusivity in both barriers, peritoneal tissue and capillary wall, decreased tissue hydraulic conductivity and increased local lymphatic absorption and functional decrease in the fraction of the ultra-small pores. This resulted in altered distribution of fluid and solutes in the peritoneal tissue, and decreased penetration depths of fluid and solutes into the tissue in UFF patients.ConclusionsMathematical modelling using a spatially distributed approach for the description of clinical data suggests that alterations both in the capillary wall and in the tissue barrier contribute to UFF through their effect on transport and distribution of solutes and fluid within the tissue.

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Alterations in tissue and blood capillary wall in relation to changes in peritoneal transport characteristics in CAPD patients with ultrafiltration failure

10.26226/morressier.59a56f96d462b8028d895fc4 ◽

2017 ◽

Author(s):

Joanna Stachowska-Pietka

Keyword(s):

Capillary Wall ◽

Blood Capillary ◽

Peritoneal Transport ◽

Ultrafiltration Failure

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The Physiological Response of Peritoneal Tissue to Certain Industrial and Pure Mineral Dusts

Public Health Reports (1896-1970) ◽

10.2307/4582019 ◽

1936 ◽

Vol 51 (49) ◽

pp. 1677 ◽

Cited By ~ 16

Author(s):

John W. Miller ◽

R. R. Sayers

Keyword(s):

Physiological Response ◽

Peritoneal Tissue ◽

Mineral Dusts

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Serum CA125 a potential marker of volume status for peritoneal dialysis patients?

The International Journal of Artificial Organs ◽

10.1177/03913988211016862 ◽

2021 ◽

pp. 039139882110168

Author(s):

Dilushi Wijayaratne ◽

Vasantha Muthu Muthuppalaniappan ◽

Andrew Davenport

Keyword(s):

Heart Failure ◽

Peritoneal Dialysis ◽

Left Ventricular ◽

Volume Status ◽

Left Ventricular Ejection ◽

Cancer Antigen 125 ◽

Membrane Function ◽

Ventricular Ejection Fraction ◽

Potential Marker ◽

Ultrafiltration Failure

Introduction: Serum cancer antigen 125(SeCA125) has been reported to be increased in patients with heart failure and correlate with both extracellular water (ECW) overload and poor prognosis. Ultrafiltration failure and ECW overload are a major cause of peritoneal dialysis (PD) technique failure. We wished to determine whether SeCA125 could also be a marker of volume status in PD patients. Methods: We contemporaneously measured SeCA125, serum N terminal brain natriuretic peptide (NTproBNP) and ECW by bioimpedance in adult PD patients attending for outpatient assessment of peritoneal membrane function. Results: The median SeCA125 was 19 (12–33) U/mL in 489 PD patients, 61.3% male, median age 61.5 (interquartile range 50–75) years. SeCA125 was positively associated with the ratio of ECW/total body water (TBW) ( r = 0.29, p < 0.001), 4-h peritoneal dialysate to serum creatinine ratio ( r = 0.23, p < 0.001), NTproBNP) ( r = 0.18, p < 0.001), and age ( r = 00.17, p = 0.001) and negatively with 24-h PD ultrafiltration volume ( r = −0.28, p < 0.001) serum albumin ( r = −0.22, p < 0.001), and echocardiographic left ventricular ejection fraction ( r = −0.20, p < 0.001), but not with residual renal function or C-reactive protein. Patients with above the median SeCA125, had greater median ECW/TBW 0.403(IQR 0.394–0.410) vs 0.395(0.387–0.404), p < 0.001 and NTproBNP (6870 (IQR 1936–20096) vs 4069 (1345–12291) vs) pg/mL, p = 0.03. Conclusion: Heart failure studies have reported SeCA125 is a marker of ECW overload. Our retrospective analysis suggests that SeCA125 is also associated with ECW volume in PD patients. Further studies are required to determine whether serial measurements of SeCA125 trend with changes in ECW status in PD patients and can be used to aid volume assessments.

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