#1533 The relationship between the severity of anemia, the level of inflammation markers and the dose of epoetin in patients in pre-dialysis stages of CKD

Abstract Background and Aims Inflammation is known to be an important factor associated with hemoglobin variability in patients with anemia of chronic disease. However, the question remains whether high levels of C-reactive protein, a widely used marker of inflammatory activity, and other inflammatory markers predict less stable anemia control in patients with CKD. The purpose of this study was to establish the relationship between the severity of anemia with the levels of inflammatory markers (C-reactive protein, IL-6) and the dose of epoetin in patients with pre-dialysis stages of CKD. The purpose of our study was to study the age-related characteristics of the nutritional status in patients with CKD of the dialysis stages who are on parenteral nutrition. Method 180 patients (96 men and 84 women) with CKD as a result of nephropathies of diabetic and non-diabetic etiology were examined. Chronic pyelonephritis was diagnosed in 96 patients, chronic glomerulonephritis - in 73, polycystic kidney disease - in 11 patients. Glomerular filtration rate was calculated based on serum creatinine concentration using the CKD-EPI formula (2011). The patients were divided into 2 groups, depending on the achievement of the target hemoglobin value. Thus, group 1 included patients with CKD C3, C4, whose hemoglobin concentration was above 110 g/l (n = 101). Group 2 included patients whose hemoglobin concentration was less than 110 g/l in at least one analysis (n = 79). Results In the examined patients, a significant correlation was found between the range of hemoglobin concentration and the range of CRP concentration (p 0.05), as well as between the range of hemoglobin concentration and the variation in the percentage of hypochromic erythrocytes (p 0.05), between the range of hemoglobin concentration and the variation of ferritin ( p 0.05). The change in the percentage of hypochromic erythrocytes also correlated with the change in IL-6 (p 0.05) and the change in CRP ( p 0.05). We found an association between the average weekly dose of epoetin and the levels of CRP, IL-6 and TNF-α. Patients with TNF-α levels ≥2 ng/mL and IL-6 ≥40 ng/mL required a significantly higher dose of epoetin than patients with lower levels of these markers (128 U/kg per week versus 57 U/kg at week). Conclusion The establishment of a relationship between inflammatory markers and hemogram and iron parameters suggests that inflammation had an indirect effect on the increase in hemoglobin through its effect on iron metabolism. The results of the study indicate the presence of diabetic and non-diabetic etiology of systemic inflammation in CKD, more so in the group of patients with type 2 diabetes mellitus.