Eryptosis Is Altered in Peritoneal Dialysis Patients

BACKGROUND

Red blood cells (RBCs) undergo programmed cell death known as eryptosis. Triggers of eryptosis include increased cytosolic Ca(2+) concentration, oxidative stress, osmotic shock, energy depletion and several uremic toxins. Little is known about the pathogenesis of eryptosis in peritoneal dialysis (PD) patients; furthermore, its relevance in worsening clinical conditions in these patients is still not completely defined.

OBJECTIVES

We investigated eryptosis levels in PD patients and its association with inflammatory and clinical parameters.

MATERIAL AND METHODS

A total of 46 PD patients and 17 healthy subjects (CTR) were enrolled. All eryptosis measurements were made in freshly isolated RBCs using the flow cytometer.

RESULTS

Eryptosis was significantly higher in PD patients than that in CTR (p < 0.001). Eryptosis levels did not differ significantly between PD patients with and without diabetes, with and without hypertension, and with and without cardiovascular disease. Eryptosis showed no significant differences between patients treated with continuous ambulatory PD/automated PD, with Kt/Vurea value ≤1.7 and >1.7, with a negative or positive history of peritonitis. On the contrary, eryptosis showed significantly lower levels in PD patients with weekly creatinine clearance ≥45 L/week/1.73 m2 (2.8%, 1.7-4.9 vs. 5.6%, 5.0-13.5; p= 0.049). Eryptosis showed significantly lower levels in PD patients with residual diuresis (n = 23) than that in patients without (3.7%, 2.6-5.6 vs. 5%, 3.1-16; p = 0.03). In these 23 patients, significant negative correlations between percentage of eryptosis and residual glomerular filtration rate (rGFR; Spearman's rho = -0.51, p = 0.01) and diuresis volume (Spearman's rho = -0.43, p = 0.05) were found.

CONCLUSIONS

The present study demonstrated higher eryptosis levels in PD patients compared to corresponding levels in CTR. Furthermore, important PD comorbidity and main PD parameters do not influence eryptosis. Importantly, our data have reported an increase in eryptosis levels with progressive residual diuresis and rGFR loss, probably due to decreased uremic toxins clearance.

Remote Monitoring of Automated Peritoneal Dialysis Improves Personalization of Dialytic Prescription and Patient's Independence

BACKGROUND

Remote monitoring (RM) supports a healthcare model that enhances patients' self-management. We evaluated the utility of RM in patients undergoing automated peritoneal dialysis (APD).

METHODS

We observed 37 -RM-APD patients, 16 incidents, and 21 prevalents switched from traditional APD (T-APD). We observed the number of changes for APD prescription, the frequency of visits, and PD adequacy parameters during 1 year of RM utilization in APD.

RESULTS

The APD prescriptions were modified more frequently in RM-APD vs. T-APD in incident (p = 0.002) and prevalent patients (p = 0.045). Visits were significant less in -RM-APD than in T-APD for incident patient (p = 0.008). No significant difference was found between prevalent populations. PD adequacy was similar in both groups.

CONCLUSIONS

Our results demonstrate that RM allows an efficient use of healthcare resources, helping to improve personalization of APD prescription and to intervene early with "trouble shooting", thereby reducing the frequency of in-person visits for emergency problems.