Effects of radiation on growth of two human tumour cell lines surviving a previous high dose, low dose-rate, radionuclide exposure

  • Authors:
    • Lova Segerström
    • Bo Stenerlow
    • Veronika Eriksson
    • Jörgen Carlsson
  • View Affiliations

  • Published online on: August 1, 2008     https://doi.org/10.3892/ijo_00000014
  • Pages:341-349
Metrics: HTML 0 views | PDF 0 views     Cited By (CrossRef): 0 citations

Abstract

Effects of radiation on growth of two human tumour cell lines that survived a previous high dose, low dose-rate radionuclide exposure simulating intensive radionuclide therapy, were analyzed. The purpose was to investigate whether the survivors gained therapy induced changes in growth and radiation response. The U118MG, ParRes (parental resistant), and U373MG, ParSen (parental sensitive), glioma cells were used because they are known to be low dose-rate radiation resistant and sensitive, respectively. These cells were initially exposed to high dose, low dose-rate radiation for 24 h and surviving U118MG and U373MG cells formed new cultures called SurRes (surviving resistant) and SurSen (surviving sensitive), respectively. All four cell types were then exposed to graded acute radiation doses, 0-8 Gy, and analyzed for radiation induced growth disturbances. They were also analyzed regarding DNA-content and cell cycle distributions. The SurRes cells regained in most cases the same growth rate, had the same growth delays and showed generally a similar response as the original ParRes cells to the 0-8 Gy exposures. In contrast, the SurSen cells had in all cases slower growth rate and longer growth delays than the original ParSen cells after the 0-8 Gy exposures. There were no signs of radiation-induced radioresistance. The slow growing SurSen cells contained about 80% more DNA and had more cells in G1 and fewer in G2 than the ParSen cells. The conclusion is that tumour cells surviving high dose, low dose-rate, radionuclide therapy, afterwards can react differently to a new radiation exposure.

Related Articles

Journal Cover

August 2008
Volume 33 Issue 2

Print ISSN: 1019-6439
Online ISSN:1791-2423

2016 Impact Factor: 3.079
Ranked #33/217 Oncology
(total number of cites)

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
APA
Segerström, L., Stenerlow, B., Eriksson, V., & Carlsson, J. (2008). Effects of radiation on growth of two human tumour cell lines surviving a previous high dose, low dose-rate, radionuclide exposure. International Journal of Oncology, 33, 341-349. https://doi.org/10.3892/ijo_00000014
MLA
Segerström, L., Stenerlow, B., Eriksson, V., Carlsson, J."Effects of radiation on growth of two human tumour cell lines surviving a previous high dose, low dose-rate, radionuclide exposure". International Journal of Oncology 33.2 (2008): 341-349.
Chicago
Segerström, L., Stenerlow, B., Eriksson, V., Carlsson, J."Effects of radiation on growth of two human tumour cell lines surviving a previous high dose, low dose-rate, radionuclide exposure". International Journal of Oncology 33, no. 2 (2008): 341-349. https://doi.org/10.3892/ijo_00000014
ftw