title: Infusion of a high number of CD34+ cells provides a rapid hematopoietic recovery and cost savings in autologous peripheral blood stem cell transplantation.
abstract: BACKGROUND
  The objectives of this study were to evaluate the effect of the number of infused CD34+ cells on hematopoietic recovery and on the cost in autologous peripheral blood stem cell transplantation (PBSCT).
  
  
  METHODS
  Sixty-nine patients who received autologous PBSCT (ABSCT) were divided into three groups defined by the number of infused CD34+ cells. The number of days until 0.5 x 10(9)/l neutrophils and 50 x 10(9)/l platelets, the number of transfused blood products, the febrile days, the duration of parenteral antibiotics and the cost of additional supportive care (transfusions of blood products and parenteral antibiotics) were analyzed.
  
  
  RESULTS
  Twenty-three patients received <2.5 x 10(6)/kg of CD34+ cells (group A), 25 patients received > or = 2.5 to 5 x 10(6)/kg of CD34+ cells (group B) and 21 patients received > or = 5 x 10(6)/kg of CD34+ cells (group C). Patients in group C had rapid neutrophil (p < 0.01) and platelet (p < 0.05) recovery and required less platelet transfusions (p < 0.05) than patients in other groups. Transfusions of red blood cell concentrates, the duration of febrile days or parenteral antibiotics were not statistically different between the two groups. The patients in group C required significantly lower costs for platelet concentrates and additional supportive care (p < 0.05).
  
  
  CONCLUSIONS
  Infusion of > or = 5 x 10(6)/kg of CD34+ cells in ABSCT shortens hematopoietic recovery and reduces costs for additional supportive care.
authors.affiliation: Second Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan.
authors.forename: Eishi
authors.initials: E
authors.lastname: Ashihara
authors.forename: Chihiro
authors.initials: C
authors.lastname: Shimazaki
authors.forename: Akira
authors.initials: A
authors.lastname: Okano
authors.forename: Mayumi
authors.initials: M
authors.lastname: Hatsuse
authors.forename: Akio
authors.initials: A
authors.lastname: Okamoto
authors.forename: Kazuho
authors.initials: K
authors.lastname: Shimura
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Takahashi
authors.forename: Toshiya
authors.initials: T
authors.lastname: Sumikuma
authors.forename: Tohru
authors.initials: T
authors.lastname: Inaba
authors.forename: Naohisa
authors.initials: N
authors.lastname: Fujita
authors.forename: Satoshi
authors.initials: S
authors.lastname: Murakami
authors.forename: Harue
authors.initials: H
authors.lastname: Haruyama
authors.forename: Masao
authors.initials: M
authors.lastname: Nakagawa
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D018952:Antigens, CD34 / Q000032:analysis*; D016913:Blood Component Transfusion; D001804:Blood Transfusion, Autologous; D003362:Cost-Benefit Analysis; D005260:Female; D019337:Hematologic Neoplasms / Q000191:economics / Q000628:therapy*; D006410:Hematopoiesis; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D008297:Male; D008875:Middle Aged; D009504:Neutrophils / Q000276:immunology / Q000637:transplantation*; D017713:Platelet Transfusion
chemical_list: D018952:Antigens, CD34