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Journal of Neuro-Oncology

, Volume 56, Issue 1, pp 29–34 | Cite as

Interleukin-6-producing Cells in a Human Glioblastoma Cell Line are not Affected by Ionizing Radiation

  • Jean-Jacques Dubost
  • Christine Rolhion
  • Andrei Tchirkov
  • Suzanne Bertrand
  • Jacques Chassagne
  • Annie Dosgilbert
  • Pierre Verrelle
Article

Abstract

We investigated the production of interleukin 6 (IL-6) by a radioresistant human glioblastoma cell line G5 after single radiation events of 3, 6 and 9 Gy. The total cell number and IL-6 concentration in culture supernatant were assessed 24–96 h after irradiation. The radiation impeded or stopped G5 cell growth in a dose-dependent manner, but unexpectedly did not affect the IL-6 concentration in cell culture media that increased in the same range as in non-irradiated cultures. Furthermore, using flow cytometry, we found that the IL-6 positive cells expansion was unaffected by radiation. These findings suggested that this small (about 1%) fraction of G5 cells, constitutively producing IL-6, is highly radioresistant.

interleukin 6 glioblastoma radioresistance 

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Jean-Jacques Dubost
    • 1
  • Christine Rolhion
    • 2
  • Andrei Tchirkov
    • 3
  • Suzanne Bertrand
    • 4
  • Jacques Chassagne
    • 5
  • Annie Dosgilbert
    • 1
  • Pierre Verrelle
    • 3
  1. 1.Unité d'Immunologie CliniqueHôpital Gabriel MontpiedFrance
  2. 2.Département de RadiothérapieINSERM U484; Unité de RadiobiologieFrance
  3. 3.Département de RadiothérapieUnité de RadiobiologieFrance
  4. 4.Centre Léon BérardINSERM U 453LyonFrance
  5. 5.Laboratoire d'ImmunologieCentre Jean Perrin, Clermont-FerrandFrance

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