KONG Zhaolu, JIN Yizun, Chinje E C, et al. Effects of NO on tumour cells radiosensitivity to γ-rays in vitro[J]. Journal of Radiation Research and Radiation Processing, 2006,24(3):171-174.
KONG Zhaolu, JIN Yizun, Chinje E C, et al. Effects of NO on tumour cells radiosensitivity to γ-rays in vitro[J]. Journal of Radiation Research and Radiation Processing, 2006,24(3):171-174.DOI:
To examine the effect of nitric oxide (NO) on tumour cells radiosensitivity, human sarcoma cells (HT1080) and its inducible nitrogen monoxide synthase (iNOS) gene transfected clones (iNOS9, iNOS12) were exposed to 1—5Gy ,60,Co γ-ray irradiation alone or combined with 500μmol/L L-NMMA, a NO synthesis inhibitor, in air or under hypoxia. It showed that both hypoxia and L-NMMA decreased the production of NO, but had no obvious effect on iNOS activity. With more NO formation, gene-tranfered cells showed higher sensitivity to irradiation and lower OER than HT1080, but there was no obvious correlation between NO and cells sensitivity to irradiation. The results indicated that NO could take part in irradiation-induced cells damage and enhance cells radiosensitivity.