5489 CROSS-TALK BETWEEN FRAILTY AND IMMUNOSENESCENCE IN PATIENTS WITH CHRONIC KIDNEY DISEASE

Abstract Background and Aims Chronic kidney disease (CKD) has been proposed as a model of premature ageing. The immune system is an important factor in the ageing process and can modulate the rate of ageing. The uremic environment highly affects this system, deteriorating its functionality and increasing susceptibility to infections, cancer, and pathologies like cardiovascular disease. Also, CKD patients are highly predisposed to frailty, which increases the organism's vulnerability to disease. This premature ageing, partially caused by the immune disorder and increased frailty, is responsible for these patients' high morbidity and mortality. Understanding these processes and how they are affected by different treatments will help generate better nutritional, pharmacological and lifestyle strategies. For this, the aim of this study was to determine the immune and frailty status of patients with CKD and their therapies. Method We performed a cross-sectional study involving 18 healthy subjects (HS) and 156 patients from the Nephrology Department of the Hospital Universitario “12 de Octubre” (Madrid, Spain). The distribution of patients was as follows: 40 with end-stage renal disease (ESRD), 40 on haemodialysis (HD), 36 on peritoneal dialysis (PD) and 40 patients who had received initial kidney transplantation (KT). The frailty status of the patients was assessed by the Edmonton Frail Scale test. Lymphocyte populations (T lymphocytes, T-helper lymphocytes, T-cytotoxic lymphocytes, and B lymphocytes) and monocytes (classical, intermediate, non-classical, and the expression of the adhesion molecule ICAM-1 and co-stimulatory B7.2) were determined in peripheral blood samples. Results The patients were similar in age and sex. The number of frail individuals was higher in patients (ESRD p