Monitoring of peripheral blood CD34+ cell counts on the first day of apheresis is highly predictive for efficient CD34+ cell yield.
The purpose of this study was to evaluate the correlation of preleukapheresis circulating CD 34+ cells/micro L, white blood cells (WBC), and platelet counts on the first day of apheresis with the yield of collected CD 34+ cell counts in 40 patients with hematological malignancies (n = 29) and solid tumors (n = 11). The median numbers of apheresis cycles, numbers of CD 34+ cells, peripheral blood (PB) mononuclear cells, and total nucleated cells collected were 2 (range, 1-4), 5.5 x 106/kg (range, 0.05-33.78), 2.59 x 108/kg (range, 0.04-20.68), and 7.36 x 108/kg (range, 0.15-28.08), respectively. There was a strong correlation between the number of preleukapheresis circulating CD 34+ cells/micro L and the yield of collected CD 34+ cells per kilogram (r = 0.962, p < 0.001). The threshold levels of PB C 34+ cell/micro L to obtain > or =1 x 106/kg and > or =2.5 x 106/kg CD 34+ cell in one collection were 12/micro L and 34/ micro L, respectively. Fifteen of 17 (88%) patients who had > or =34 CD 34+ cells/ micro L in the PB before collection reached the level of > or =2.5 x 106/kg in a single apheresis. Despite a low r value, WBC and platelet counts on the first day of apheresis also correlated with the yield of collected daily CD 34+ cells per kilogram (r = 0.482, p < 0.01 and r = 0.496 p < 0.01, respectively). These data suggest that preleukapheresis circulating CD 34+ cells/ micro L correlated significantly better with the yield of collected CD 34+ cells than WBC and platelet counts on the first day of apheresis. Using a value of 34/micro L preleukapheresis circulating CD 34+ cells as a guide for the timing of peripheral blood stem cells collections can be time saving and cost-effective.
Demirer
Taner
T
Ankara University Medical School, Department of Hematology/Oncology and Bone Marrow Transplant, Ankara, Turkey. demirer@medicine.ankara.edu.tr
Ilhan
Osman
O
Ayli
Meltem
M
Arat
Mutlu
M
Dagli
Mehmet
M
Ozcan
Muhit
M
Haznedar
Rauf
R
Genc
Yasemin
Y
Fen
Turgay
T
Ayyildiz
Erol
E
Dincer
Suleyman
S
Arslan
Onder
O
Gurman
Gunhan
G
Konuk
Nahide
N
Dalva
Klara
K
Uysal
Akin
A
Koc
Haluk
H
Ozet
Gulsum
G
Akan
Hamdi
H
D000293:Adolescent; D000328:Adult; D018952:Antigens, CD34 / Q000097:blood*; D001800:Blood Specimen Collection; D006689:Hodgkin Disease / Q000097:blood / Q000628:therapy; D006801:Humans; D007937:Leukapheresis; D008223:Lymphoma / Q000097:blood / Q000628:therapy*; D008228:Lymphoma, Non-Hodgkin / Q000097:blood / Q000628:therapy; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D009101:Multiple Myeloma / Q000097:blood / Q000628:therapy; D009504:Neutrophils; D010976:Platelet Count
D018952:Antigens, CD34