Spheroid control of malignant glioma cell lines after fractionated irradiation: relation to the surviving fractions at 2 Gy and colony forming efficiencies in a soft agar clonogenic assay.
Spheroid control doses (SCD50) were determined for ten human glioma lines after fractionated irradiation under oxic conditions. In addition, SF2 values and colony forming efficiencies (CFE) were measured in a soft agarose clonogenic assay. A significant relationship existed between the SCD50 values and the SF2-CFE data pairs (p = 0.01) but the SCD50 values were higher than expected from the SF2 and CFE values. This comparison shows the influence of environmental factors (different in both model systems) on reproductive tumour cell death after irradiation.
Stuschke
M
M
Department of Radiotherapy, University of Essen, Germany.
Budach
V
V
Kalff
R L
RL
Sack
H
H
Bamberg
M
M
Reinhardt
V
V
Feldmann
H J
HJ
D002449:Cell Aggregation; D002460:Cell Line; D002470:Cell Survival / Q000528:radiation effects; D003114:Colony-Forming Units Assay; D005910:Glioma / Q000532:radiotherapy*; D006801:Humans; D014410:Tumor Stem Cell Assay