Svensson A, Engervall P, Söderstrom T, Hansson M. PBSC harvests individually optimized by using pre-collection CD34(+) values and on-line flow cytometric analysis of the mononuclear cell enrichment.
Cytotherapy 2010;
1:165-74. [PMID:
12881172 DOI:
10.1080/14653249910001591246]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND
We have investigated how the amount of blood processed during collection of PBSC affects the yield of CD34 cells.
METHODS
We first established a method of significantly increasing the enrichment of mononuclear cells (MNC), CD34(+) cells and granulocyte-macrophage progenitors (GM-CFU) by on-line flow cytometric (FCM) analysis of the leukocyte populations in the collect line. A total of 166 PBSC collections from 94 patients, were devided into five groups according to the blood volume processed: < 12 L of processed blood, 12-13L, 13-14L, 14-15L and > 15L.
RESULTS
When the yield of CD34(+) cells war compared between these groups, a positive correlation was seen (r=0.97) between the processed blood volume and the yield, expressed as a ratio between total number of CD34(+) cells in the harvest and the CD34(+) cell concentration in blood. This correlation can be used to estimate the volume that must be processed to exceed a specific target number of CD34(+) cells. The implications of these results on the need for one, two or more leukapheresis procedures in order to collect a sufficient amount of stem and progenitor cells for a given patient are discussed, i n relation to clinical logistics and the benefits for the patients.
DISCUSSION
PBSC harvest can be improved by individually-adjusted leukapheresis according to on-line FCM analysis and pre-harvest levels of CD34(+) cells and the processed blood volume can be used to predict the CD34(+) yield.
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