title: Improvement of brain function in hemodialysis patients treated with erythropoietin.
abstract: To evaluate the effects of recombinant human erythropoietin (rHuEPO) on brain function, 15 chronic hemodialysis patients were studied by event-related P300, stimulus-related evoked potentials, and trailmaking before (hematocrit 22.7%) and after rHuEPO (hematocrit 30.6%). P300 peak latency elicited by a tone discrimination paradigm improved (391 before vs. 366 ms after; Cz = vertex; P less than 0.01) confirming beneficial effects on cerebral cognitive processing. P300 amplitude (13.6 vs. 15.8 microV; P = 0.06) and trailmaking tended to improve (55 vs. 43 s). P300 measures were influenced by low hemoglobin levels before rHuEPO (P less than 0.01), suggesting that severe anemia may contribute to uremic brain dysfunction. Furthermore, decrease of stimulus-related auditory brainstem I-V interpeak latency (4.28 before vs. 4.17 ms after; P less than 0.05) and increase of somatosensory N20/P25 amplitude (4.8 vs. 7.0 microV; P less than 0.05) pointed to improvement of sensory pathways by mechanisms unrelated to cognition. Brain dysfunction in chronic hemodialysis patients may, beside other factors, in part be caused by severe anemia and can be improved by rHuEPO treatment.
authors.affiliation: 1st Department of Medicine, University of Vienna, Austria.
authors.forename: G
authors.initials: G
authors.lastname: Grimm
authors.forename: F
authors.initials: F
authors.lastname: Stockenhuber
authors.forename: B
authors.initials: B
authors.lastname: Schneeweiss
authors.forename: C
authors.initials: C
authors.lastname: Madl
authors.forename: J
authors.initials: J
authors.lastname: Zeitlhofer
authors.forename: B
authors.initials: B
authors.lastname: Schneider
mesh_terms: D000740:Anemia / Q000188:drug therapy* / Q000209:etiology / Q000523:psychology; D003072:Cognition Disorders / Q000188:drug therapy* / Q000209:etiology; D004921:Erythropoietin / Q000627:therapeutic use*; D005071:Evoked Potentials / Q000187:drug effects; D005073:Evoked Potentials, Somatosensory / Q000187:drug effects; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011994:Recombinant Proteins / Q000627:therapeutic use; D006435:Renal Dialysis / Q000009:adverse effects*; D014145:Trail Making Test
chemical_list: D011994:Recombinant Proteins; D004921:Erythropoietin