The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Efficiency of three different hemodialysis membranes for plasma porphyrin removal.

To assess the capability of three different membranes to remove porphyrins, plasma and dialysate porphyrin levels were fluorometrically measured in 10 patients with end-stage renal failure who were on hemodialysis. Three different hemodialysis membranes were used: cuprophan, polyacrylonitrile, and cellulose triacetate. Total plasma porphyrin concentrations decreased after dialysis, but to a lesser extent when using the cuprophan membrane (19%) than with the polyacrylonitrile (26%) or cellulose triacetate (30%) membranes (P < 0.01). However, since the free plasma porphyrin fraction remained unchanged, it can be assumed that the equilibrium between protein-bound and non-protein-bound (free) porphyrins is displaced toward the latter fraction. Dialysate porphyrin levels were lower (P < 0.01) when using the cuprophan membrane (10.1 micrograms/session) than when using polyacrylonitrile (17.8 micrograms/session) and cellulose triacetate (21.9 micrograms/session). Although most of the plasma porphyrins are protein bound, our results show that hemodialysis can remove significant amounts of non-protein-bound (free) porphyrins. The polyacrylonitrile and cellulose triacetate membranes had a greater capacity for porphyrin removal than cuprophan. Thus, two high-permeability membranes (polyacrylonitrile and cellulose triacetate) should be used whenever a reduction of plasma porphyrin levels is desired.[1]


  1. Efficiency of three different hemodialysis membranes for plasma porphyrin removal. Fontanellas, A., Herrero, J.A., Moran, M.J., Coronel, F., Sepulveda, P., Barrientos, A., Enriquez De Salamanca, R. Am. J. Kidney Dis. (1995) [Pubmed]
WikiGenes - Universities