Effects of prior therapy on the in vitro proliferative potential of stem cell factor plus filgrastim-mobilized CD34-positive progenitor cells

Fred Shapiro, Tzy Jyun Yao, Craig Moskowitz, Lilian Reich, David L. Wuest, Shelly Heimfeld, Ian K. McNiece, Janice Gabrilove, Stephen Nimer, Malcolm A.S. Moore

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The quantity of hematopoietic progenitors in an apheresis collection is defined by the number of CD34+ cells or granulocyte macrophage colony- forming units present. These parameters are believed to give roughly equivalent information on graft quality. We here report that the in vitro proliferative potential of r-metHuSCF (stem cell factor) plus filgrastim (granulocyte colony-stimulating factor; r-metHuG-CSF) mobilized peripheral blood (PB) CD34+ cells obtained from previously heavily treated non- Hodgkin's lymphoma patients inversely correlates with extent of prior therapy. CD34+ cells were enriched using the CellPro Ceprate system and placed in liquid culture for 4 weeks in the presence of either r-metHuSCF, IL-3, IL-6, filgrastim (S36G), or S36G plus erythropoietin (S36GE) with a weekly exchange of media and cytokines with reestablishment of culture at the starting cell concentration (Delta assay) and enumeration of progenitors. Starting with 4 x 104 CD34+ cells from apheresis samples from patients who had received <10 cycles of prior chemotherapy, progenitors were detectable in culture at 4 weeks 81% of the time as compared to 14% with CD34+ cells from patients who had received >10 cycles and 5% for >10 cycles plus radiotherapy. The total number of progenitors generated over the duration of culture (area under the curve) was calculated using the trapezoidal rule as a novel measure of the proliferative potential of the enriched PB CD34+ cell population. The median area under the curve of CD34+ cells from patients receiving <10 cycles of prior chemotherapy was 7.4 and 5.7 (x l05) using S36G or S36GE, respectively, 1.8 and 1.9 if the patients received >10 cycles of prior chemotherapy, and 1.4 and 1.2 if the patients received >10 cycles of prior chemotherapy plus radiotherapy (P < 0.001). These data show that prior therapy impacts on the quality of PB CD34+ cells as measured by their ability to generate committed progenitors over a number of weeks in liquid culture.

Original languageEnglish (US)
Pages (from-to)1571-1578
Number of pages8
JournalClinical Cancer Research
Volume3
Issue number9
StatePublished - Sep 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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    Shapiro, F., Yao, T. J., Moskowitz, C., Reich, L., Wuest, D. L., Heimfeld, S., McNiece, I. K., Gabrilove, J., Nimer, S., & Moore, M. A. S. (1997). Effects of prior therapy on the in vitro proliferative potential of stem cell factor plus filgrastim-mobilized CD34-positive progenitor cells. Clinical Cancer Research, 3(9), 1571-1578.