Cytokines and growth factors in mostly atherosclerotic patients on hemodialysis determined by biochip array technology
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Jadranka Sertic
Abstract
Background: The lifespan of patients with chronic renal failure (CRF) is reduced, and coronary artery disease is the leading cause of morbidity and mortality in these patients. The progression of atherosclerosis is accelerated and angiogenesis is impaired in CRF. Risk factors that could contribute to further understanding of vascular pathology include markers of inflammation and growth factors. The purpose of this study was to determine the levels of cytokines (IL-2, IL4, IL-6, IL-8, IL-10, IL-1α, IL-1β), vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), interferon-γ (IFNγ), tumor necrosis factor-α (TNFα) and monocyte chemotactic protein-1 (MCP-1) in patients on chronic hemodialysis (HD; n=75), and to compare values with those of control subjects (n=113).
Methods: Evidence® biochip array analyzer was used for quantification of plasma concentrations in samples.
Results: Significant differences were found between the control subjects and HD patients. IL-2 (p<0.001), IL-4 (p<0.001) and EGF (p<0.001) levels were higher in controls than in HD patients, while IL-6 (p<0.001), IL-8 (p=0.081), IL-10 (p=0.008), TNFα (p<0.001), IL-1β (p<0.001) and MCP-1 (p<0.001) levels were higher in HD patients. We also found IL-2 (p=0.015) and IL-1α (p=0.035) levels to be significantly higher in males than females, while IL-4 (p=0.025) and IL-1β (p=0.049) levels were significantly higher in females. Among HD patients, IL-2 levels were higher in patients under the age of 50 years (p<0.048). It was also higher in female than in male patients (p<0.035) and in patients on HD for more than 10 years (p<0.009). IL-6 levels were higher in patients over the age of 50 years (p<0.047). Patients with previous glomerulonephritis had the highest level of IL-6 compared to patients with previous pyelonephritis and diabetes mellitus (p<0.063). IL-6 levels were higher in patients with concomitant hepatitis C virus (HCV) infection (p<0.036) and in patients with developed atherosclerosis (p<0.003). IL-8 levels were higher in patients over the age of 50 years (p<0.003) and in the group with previous glomerulonephritis (p<0.031). IL-10 levels were higher in the group with developed atherosclerosis (p<0.045). EGF was the highest in the group of patients with previous diabetes mellitus compared to pyelonephritis and glomerulonephritis groups (p<0.073). TNFα levels were higher in the patient population on HD for more than 10 years (p<0.032) and in the concomitant HCV group (p<0.073). IL-1β levels were higher in the HCV group (p<0.088).
Conclusions: Plasma concentrations of some cytokines and growth factors could serve as useful diagnostic and prognostic parameters for patients with CRF on HD.
Clin Chem Lab Med 2007;45:1347–52.
©2007 by Walter de Gruyter Berlin New York
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- Biochemical properties of endogenous presenilin 1 and presenilin 2 in cultured human B-lymphocytes
- CD36 polymorphism and its relationship with body mass index and coronary artery disease in a Korean population
- Preservation of RNA for functional analysis of separated alleles in yeast: comparison of snap-frozen and RNALater® solid tissue storage methods
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