M. Drake et al., ANALYSIS OF THE EFFECT OF PRIOR THERAPY ON PROGENITOR-CELL YIELD - USE OF A CHEMOTHERAPY SCORING SYSTEM, British Journal of Haematology, 98(3), 1997, pp. 745-749
A quantitative analysis of peripheral blood stem cell (PBSC) yield, me
asuring absolute numbers of CD34(+) cellsx10(6)/kg and CFU-Cx10(4)/kg
was performed in 74 consecutive patients. The interval or 'gap' from t
he end of previous chemotherapy to the dale of priming was recorded in
weeks. Geometric mean CD34 and CFU-C values were significantly higher
in patients with a score of less than or equal to 60 compared to thos
e with score > 60 (P = 0.003 and 0.02, respectively) and a significant
difference in CD34 Values was also found when scores of less than or
equal to 38 were compared with scores > 38 (P = 0.003), with the diffe
rence in CFU-C values approaching significance (P=0.08). Patients expo
sed to toxicity factor 4 drugs had significant lowering of both CD34 a
nd CFU-C Values (P<0.001 and P=0.038) and this emerged as the only ind
ependent factor when analysed using linear regression. No significant
difference in the geometric mean CD34 or CFU-C values of patients was
found in any of the gap categories analysed. Prior exposure to toxicit
y factor 4 drugs had a significant adverse effect on stem cell yield a
nd should be avoided or minimized prior to stem cell harvesting.