Repair of potentially lethal damage does not depend on functional TP53 in human glioblastoma cells

C. van Bree; N. A. P. Franken; H. M. Rodermond; L. J. A. Stalpers; J. Haveman

doi:https://doi.org/10.1667/3154

Repair of potentially lethal damage does not depend on functional TP53 in human glioblastoma cells

C. van Bree, N. A. P. Franken, H. M. Rodermond, L. J. A. Stalpers, J. Haveman

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The functionality of G(1)-phase arrest was investigated in relation to repair of potentially lethal damage (PLD) in human glioblastoma Gli-06 cells. Confluent cultures were irradiated and plated for clonogenic survival either immediately or 24 h after gamma irradiation. Bivariate flow cytometry was performed to assess the distribution over the cell cycle. Levels of TP53 and CDKN1A protein were assessed with Western blotting and levels of CDKN1A mRNA with RT-PCR. Confluence significantly reduced the number of proliferating cells. Marked PLD repair was found in the absence of an intact G, arrest. No accumulation of TP53 was observed, and the protein was smaller than the wild-type TP53 of RKO cells. No increased expression of CDKNIA at the mRNA or protein levels was found in Gli-06 cells. The TP53 of Gli-06 cells was unable to transaetivate the CDKNIA gene. From this study, it is evident that PLD repair may be present without a functional TP53 or G, arrest. (C) 2004 by Radiation Research Society

Original language	English
Pages (from-to)	511-516
Journal	Radiation research
Volume	161
Issue number	5
DOIs	https://doi.org/10.1667/3154
Publication status	Published - 2004

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@article{2930064f11af4138b542fb9286c2dbb0,

title = "Repair of potentially lethal damage does not depend on functional TP53 in human glioblastoma cells",

abstract = "The functionality of G(1)-phase arrest was investigated in relation to repair of potentially lethal damage (PLD) in human glioblastoma Gli-06 cells. Confluent cultures were irradiated and plated for clonogenic survival either immediately or 24 h after gamma irradiation. Bivariate flow cytometry was performed to assess the distribution over the cell cycle. Levels of TP53 and CDKN1A protein were assessed with Western blotting and levels of CDKN1A mRNA with RT-PCR. Confluence significantly reduced the number of proliferating cells. Marked PLD repair was found in the absence of an intact G, arrest. No accumulation of TP53 was observed, and the protein was smaller than the wild-type TP53 of RKO cells. No increased expression of CDKNIA at the mRNA or protein levels was found in Gli-06 cells. The TP53 of Gli-06 cells was unable to transaetivate the CDKNIA gene. From this study, it is evident that PLD repair may be present without a functional TP53 or G, arrest. (C) 2004 by Radiation Research Society",

author = "{van Bree}, C. and Franken, {N. A. P.} and Rodermond, {H. M.} and Stalpers, {L. J. A.} and J. Haveman",

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doi = "https://doi.org/10.1667/3154",

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T1 - Repair of potentially lethal damage does not depend on functional TP53 in human glioblastoma cells

AU - van Bree, C.

AU - Franken, N. A. P.

AU - Rodermond, H. M.

AU - Stalpers, L. J. A.

AU - Haveman, J.

PY - 2004

Y1 - 2004

N2 - The functionality of G(1)-phase arrest was investigated in relation to repair of potentially lethal damage (PLD) in human glioblastoma Gli-06 cells. Confluent cultures were irradiated and plated for clonogenic survival either immediately or 24 h after gamma irradiation. Bivariate flow cytometry was performed to assess the distribution over the cell cycle. Levels of TP53 and CDKN1A protein were assessed with Western blotting and levels of CDKN1A mRNA with RT-PCR. Confluence significantly reduced the number of proliferating cells. Marked PLD repair was found in the absence of an intact G, arrest. No accumulation of TP53 was observed, and the protein was smaller than the wild-type TP53 of RKO cells. No increased expression of CDKNIA at the mRNA or protein levels was found in Gli-06 cells. The TP53 of Gli-06 cells was unable to transaetivate the CDKNIA gene. From this study, it is evident that PLD repair may be present without a functional TP53 or G, arrest. (C) 2004 by Radiation Research Society

AB - The functionality of G(1)-phase arrest was investigated in relation to repair of potentially lethal damage (PLD) in human glioblastoma Gli-06 cells. Confluent cultures were irradiated and plated for clonogenic survival either immediately or 24 h after gamma irradiation. Bivariate flow cytometry was performed to assess the distribution over the cell cycle. Levels of TP53 and CDKN1A protein were assessed with Western blotting and levels of CDKN1A mRNA with RT-PCR. Confluence significantly reduced the number of proliferating cells. Marked PLD repair was found in the absence of an intact G, arrest. No accumulation of TP53 was observed, and the protein was smaller than the wild-type TP53 of RKO cells. No increased expression of CDKNIA at the mRNA or protein levels was found in Gli-06 cells. The TP53 of Gli-06 cells was unable to transaetivate the CDKNIA gene. From this study, it is evident that PLD repair may be present without a functional TP53 or G, arrest. (C) 2004 by Radiation Research Society

U2 - https://doi.org/10.1667/3154

DO - https://doi.org/10.1667/3154

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SN - 0033-7587

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JO - Radiation research

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