TY - JOUR
T1 - Correlation of micronuclei-induction with the cell survival in HeLa cells treated with a base analogue, azidothymidine (AZT) before exposure to different doses of γ-radiation
AU - Jagetia, Ganesh Chandra
AU - Aruna, R.
PY - 2003/3/20
Y1 - 2003/3/20
N2 - The effect of 0.1 μM azidothymidine (AZT) a pyrimidine analogue has been studied on the growth kinetics, cell survival and micronuclei formation in HeLa cells exposed to 0, 0.25, 0.5, 1, 2 and 3 Gy of 60Co γ-radiation. The AZT pretreatment resulted in a significant decline in the cell growth kinetics, cell survival and cell proliferation indices when compared with the PBS+irradiation group at 20, 30 and 40 h post-irradiation. Conversely, the frequency of micronucleated binucleate cells (MNBNC) elevated in a dose dependent manner in both PBS+irradiation and AZT+irradiation group. This elevation in MNBNC-induction was significantly higher in the latter when compared with the former group at all post-irradiation scoring time periods studied. The dose-response relationship for micronuclei induction for both the PBS+irrradiation and AZT+irradiation groups was linear. The biological response was studied by correlating the cell survival with MNBNC-induction. The cell survival and MNBNC-induction showed a close but inverse relationship and this relationship gave a best fit on the linear quadratic model.
AB - The effect of 0.1 μM azidothymidine (AZT) a pyrimidine analogue has been studied on the growth kinetics, cell survival and micronuclei formation in HeLa cells exposed to 0, 0.25, 0.5, 1, 2 and 3 Gy of 60Co γ-radiation. The AZT pretreatment resulted in a significant decline in the cell growth kinetics, cell survival and cell proliferation indices when compared with the PBS+irradiation group at 20, 30 and 40 h post-irradiation. Conversely, the frequency of micronucleated binucleate cells (MNBNC) elevated in a dose dependent manner in both PBS+irradiation and AZT+irradiation group. This elevation in MNBNC-induction was significantly higher in the latter when compared with the former group at all post-irradiation scoring time periods studied. The dose-response relationship for micronuclei induction for both the PBS+irrradiation and AZT+irradiation groups was linear. The biological response was studied by correlating the cell survival with MNBNC-induction. The cell survival and MNBNC-induction showed a close but inverse relationship and this relationship gave a best fit on the linear quadratic model.
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U2 - 10.1016/S0378-4274(02)00439-3
DO - 10.1016/S0378-4274(02)00439-3
M3 - Article
C2 - 12595156
AN - SCOPUS:0037457284
SN - 0378-4274
VL - 139
SP - 33
EP - 43
JO - Toxicology Letters
JF - Toxicology Letters
IS - 1
ER -