Key result
Hemodialysis membrane type is associated with plasma endothelin and CGRP levels but not hANP.
Why the study?
Does the type of dialyzer membrane used during hemodialysis affect plasma levels of vasoactive peptides in uremic patients?
Observational
Does the type of dialyzer membrane used during hemodialysis affect plasma levels of vasoactive peptides in uremic patients?
The effect of hemodialysis on plasma levels of endothelin and CGRP, but not hANP, is dependent on the specific type of dialyzer membrane used.
Membrane choice may alter endothelin and CGRP levels in hemodialysis; leaves open clinical relevance and should not yet change practice.
To determine the role of vasoactive peptides such as endothelin (ET), calcitonin gene-related peptide (CGRP) and human atrial natriuretic peptide (hANP) in the regulation of blood pressure in uremic patients, and to determine the effect of various types of dialyzer membranes on hemodialysis (HD)-induced changes in plasma levels of such peptides, plasma ET, CGRP and hANP were measured in HD patients and patients on continuous ambulatory peritoneal dialysis (CAPD). Plasma levels of ET, CGRP, and hANP were significantly higher in HD and CAPD patients than in healthy subjects. There were no significant differences in plasma levels of ET, CGRP, and hANP between hypertensive and normotensive HD patients, and no significant correlation was observed between HD-induced changes in plasma levels and changes in blood pressure. Plasma levels of ET decreased when HD was performed using high-flux membranes, such as polyacrylonitrile (PAN), polymethyl methacrylate (PMMA) and cellulose triacetate (CTA), but did not decrease using a saponified cellulose (SC) membrane. Plasma levels of CGRP decreased in the case of PAN, but increased significantly with PMMA and showed no change with SC and CTA. Plasma levels of hANP decreased in all types of dialyzer membranes due to decreased secretion. These results indicate that the effect of HD on plasma levels of ET and CGRP, but not hANP, depends on the type of dialyzer membrane used.
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Niwa et al. (2008) conducted an observational in Uremia. Hemodialysis with various dialyzer membranes vs. Healthy subjects and different dialyzer membranes was evaluated on Plasma levels of endothelin (ET), calcitonin gene-related peptide (CGRP), and human atrial natriuretic peptide (hANP). The effect of hemodialysis on plasma levels of endothelin and calcitonin gene-related peptide, but not human atrial natriuretic peptide, depends on the type of dialyzer membrane used.
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