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PubMed1993

Beta-2-microglobulin serum profiles in different settings of mass transport and fluid pyrogen content.

Different beta 2-microglobulin (beta 2m) serum profiles have been related to dialytic membranes, mass transport and/or patient immune stimulation. Eight patients were followed by cycles of four sessions: hemodialysis (HD), hemodiafiltration (HDF), acetate-free HDF (AFH), hemofiltration (HF) by filters on synthetic membranes (polysulphone = 4; methylmethacrylate = 4); pre- (A) and post- (B) measurements in the fourth session, and at the start of the next one (C), beta 2m lipopolysaccharide content of the fluids (LPS), and monocytes in vitro and spontaneous production of interleukins (IL); IL-1-IL-6 and tumor necrosis factor (TNF) were measured. In HD, beta 2m (mg/liter), corrected for ECV distribution, did not change (A = 36.5 +/- 10, B = 37 +/- 9, C = 36.4 +/- 9.7). In HDF, lower basal beta 2m (P < 0.001; A = 26.5 +/- 9) still decreased (B = 9.13 +/- 6.2), boosting subsequently to C = 21.6 +/- 14, as in AFH (A = 24.5 +/- 7, B = 11.2 +/- 2, C = 25.3 +/- 9) and in HF (A = 26.6 +/- 7; B = 8.5 +/- 4; C = 25.6 +/- 11). LPS (EU/ml) decreased (P < 0.001) from HD fluids (0.41 +/- 0.1) to HDF (0.28 +/- 0.1), AFH (0.15 +/- 0.1) and HF (0.04 +/- 0.05) but IL-1 and IL-6 were found in greater concentrations in HDF and AFH versus HD and HF, probably due to back-filtration. Beta 2m in different modes of dialytic treatments seem better correlated with the amount of convective transport rather than with the selected markers of immune stimulation.

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