title: Epoetin enhances erythropoiesis in normal men undergoing repeated phlebotomies.
abstract: Epoetin may enhance autologous blood donation, but efficacy and dose response have not been established. This multicenter, double-blind trial compared intravenous placebo (n = 23) with epoetin beta, 250 U/kg (n = 23), 500 U/kg (n = 19), and 1000 U/kg (n = 22), administered three times weekly for 26 days. Normal men (age, 28 +/- 7 years; mean +/- SD) received phlebotomies up to three times weekly as long as the hemoglobin remained greater than or equal to 12 gm/dl. Subjects treated with epoetin donated 32% more units of blood (p less than 0.05) compared with placebo. A dose response was not observed. Platelet counts increased with epoetin compared with placebo, but platelet function and bleeding time did not change. Prothrombin times increased and partial thromboplastin times decreased with both epoetin and placebo. The supernatant of packed red blood cells collected after multiple phlebotomies and stored 42 days had slightly lower glucose concentrations and pH after therapy with epoetin. Blood pressure did not change with epoetin or placebo. These findings support the efficacy and safety of epoetin for enhancing the erythropoietic response of normal subjects during intensive phlebotomy.
authors.affiliation: Drug Evaluation Unit, Hennepin County Medical Center, Minneapolis, MN 55415.
authors.forename: P A
authors.initials: PA
authors.lastname: Abraham
authors.forename: C E
authors.initials: CE
authors.lastname: Halstenson
authors.forename: M M
authors.initials: MM
authors.lastname: Macres
authors.forename: J A
authors.initials: JA
authors.lastname: Opsahl
authors.forename: B H
authors.initials: BH
authors.lastname: Rank
authors.forename: M H
authors.initials: MH
authors.lastname: Schwenk
authors.forename: L C
authors.initials: LC
authors.lastname: Lasky
authors.forename: A
authors.initials: A
authors.lastname: Cohen
authors.forename: K C
authors.initials: KC
authors.lastname: Lasseter
authors.forename: D L
authors.initials: DL
authors.lastname: Smith
mesh_terms: D000293:Adolescent; D000328:Adult; D000450:Aldosterone / Q000097:blood; D001777:Blood Coagulation / Q000187:drug effects; D001782:Blood Donors; D001792:Blood Platelets / Q000187:drug effects / Q000502:physiology; D001793:Blood Preservation; D001794:Blood Pressure / Q000187:drug effects; D001815:Bloodletting; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004911:Erythrocyte Volume; D004920:Erythropoiesis / Q000187:drug effects*; D004921:Erythropoietin / Q000097:blood*; D005319:Fetal Hemoglobin / Q000187:drug effects; D006801:Humans; D007501:Iron / Q000097:blood; D008297:Male; D008875:Middle Aged; D010976:Platelet Count / Q000187:drug effects; D012083:Renin / Q000097:blood; D012086:Reoperation
chemical_list: D004921:Erythropoietin; D000450:Aldosterone; D005319:Fetal Hemoglobin; D007501:Iron; D012083:Renin