Serum β2-microglobulin correlates positively with left ventricular hypertrophy in long-term hemodialysis patients.
Nephron Clin Pract 2014;
128:101-6. [PMID:
25376242 DOI:
10.1159/000365447]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 06/24/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS
β2-Microglobulin (β2-MG) is a major protein component of dialysis-related amyloidosis. In long-term hemodialysis (HD) patients, β2-MG amyloid deposits not only in osteoarticular tissues, but also in systemic tissues, including the heart. The purpose of this study was to investigate the relationship between serum β2-MG concentrations and echocardiographic parameters in long-term HD patients in a cross-sectional study.
METHODS
Measurement of serum β2-MG concentrations and echocardiography were performed in 251 patients who had undergone HD therapy for more than 10 years.
RESULTS
The left ventricular mass index (LVMI) of the higher serum β2-MG (≥30 mg/l) group was significantly higher than that of the lower serum β2-MG (<30 mg/l) group (151.5 ± 45.7 vs. 137.0 ± 44.5 g/m(2), p = 0.020). In simple regression analyses, serum β2-MG concentrations correlated significantly and positively with interventricular septum thickness (IVST) (r = 0.215, p < 0.001), posterior left ventricular wall thickness (PWT) (r = 0.249, p < 0.001), left ventricular wall thickness (LVWT) (r = 0.252, p < 0.001), relative wall thickness (RWT) (r = 0.153, p = 0.015) and LVMI (r = 0.171, p = 0.007). Multiple regression analyses revealed that serum β2-MG concentrations correlated significantly and positively with IVST, PWT, LVWT and RWT.
CONCLUSION
Serum β2-MG concentrations correlated significantly and positively with the echocardiographic parameters of left ventricular hypertrophy (LVH) in long-term HD patients. Thus, deposition of β2-MG amyloid in the heart may be associated with LVH progression.
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