Enhanced expression of thymidine kinase in human cells following ionizing radiation

David A. Boothman, Thomas W. Davis, Walter M. Sahijdak

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Purpose: We investigated the induction of thymidine kinase transcription and enzymatic activity, and the activation of transcription factors binding to the thymidine kinase promoter, in human normal compared to tumor cells in culture before and after ionizing radiation. Methods and Materials: Northern blot, dot-blot, and thymidine kinase enzyme assays were used to observe thymidine kinase transcript and enzymatic changes before and after radiation. Temporal expression of thymidine kinase transcripts following an optimal induction dose of radiation was also studied. Gel mobility shift assays were performed using a 95-base pair fragment of the thymidine kinase promoter (containing the CCAAT box) to analyze transcription factor binding. Results: Thymidine kinase transcript and enzymatic levels were higher in human tumor compared to normal cells. In contrast, levels of x-ray-activated thymidine kinase transcription factors were not significantly different in human neoplastic compared to normal cells. Conclusion: Elevated x-ray-induced thymidine kinase transcripts, enzymatic levels, and transcription factors are consistent with the loss of stringent cell growth regulation associated with neoplastic cells. The induction of thymidine kinase following ionizing radiation may be exploited in chemotherapeutic strategies which use halogenated pyrimidines and/or in various gene therapy strategies.

Original languageEnglish (US)
Pages (from-to)391-398
Number of pages8
JournalInternational Journal of Radiation Oncology, Biology, Physics
Volume30
Issue number2
DOIs
StatePublished - Sep 30 1994

Fingerprint

thymidine
Thymidine Kinase
Ionizing Radiation
ionizing radiation
Transcription Factors
induction
tumors
cells
X-Rays
Radiation
gene therapy
Pyrimidines
Enzyme Assays
pyrimidines
Electrophoretic Mobility Shift Assay
radiation
Base Pairing
Northern Blotting
Genetic Therapy
boxes

Keywords

  • DNA binding proteins
  • Enzymatic assay
  • Ionizing radiation
  • Nuclear extracts
  • Transcription factors

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Radiation

Cite this

Enhanced expression of thymidine kinase in human cells following ionizing radiation. / Boothman, David A.; Davis, Thomas W.; Sahijdak, Walter M.

In: International Journal of Radiation Oncology, Biology, Physics, Vol. 30, No. 2, 30.09.1994, p. 391-398.

Research output: Contribution to journalArticle

Boothman, David A. ; Davis, Thomas W. ; Sahijdak, Walter M. / Enhanced expression of thymidine kinase in human cells following ionizing radiation. In: International Journal of Radiation Oncology, Biology, Physics. 1994 ; Vol. 30, No. 2. pp. 391-398.
@article{9af1eec9c27b4220ba84def10478fd2f,
title = "Enhanced expression of thymidine kinase in human cells following ionizing radiation",
abstract = "Purpose: We investigated the induction of thymidine kinase transcription and enzymatic activity, and the activation of transcription factors binding to the thymidine kinase promoter, in human normal compared to tumor cells in culture before and after ionizing radiation. Methods and Materials: Northern blot, dot-blot, and thymidine kinase enzyme assays were used to observe thymidine kinase transcript and enzymatic changes before and after radiation. Temporal expression of thymidine kinase transcripts following an optimal induction dose of radiation was also studied. Gel mobility shift assays were performed using a 95-base pair fragment of the thymidine kinase promoter (containing the CCAAT box) to analyze transcription factor binding. Results: Thymidine kinase transcript and enzymatic levels were higher in human tumor compared to normal cells. In contrast, levels of x-ray-activated thymidine kinase transcription factors were not significantly different in human neoplastic compared to normal cells. Conclusion: Elevated x-ray-induced thymidine kinase transcripts, enzymatic levels, and transcription factors are consistent with the loss of stringent cell growth regulation associated with neoplastic cells. The induction of thymidine kinase following ionizing radiation may be exploited in chemotherapeutic strategies which use halogenated pyrimidines and/or in various gene therapy strategies.",
keywords = "DNA binding proteins, Enzymatic assay, Ionizing radiation, Nuclear extracts, Transcription factors",
author = "Boothman, {David A.} and Davis, {Thomas W.} and Sahijdak, {Walter M.}",
year = "1994",
month = "9",
day = "30",
doi = "10.1016/0360-3016(94)90019-1",
language = "English (US)",
volume = "30",
pages = "391--398",
journal = "International Journal of Radiation Oncology Biology Physics",
issn = "0360-3016",
publisher = "Elsevier Inc.",
number = "2",

}

TY - JOUR

T1 - Enhanced expression of thymidine kinase in human cells following ionizing radiation

AU - Boothman, David A.

AU - Davis, Thomas W.

AU - Sahijdak, Walter M.

PY - 1994/9/30

Y1 - 1994/9/30

N2 - Purpose: We investigated the induction of thymidine kinase transcription and enzymatic activity, and the activation of transcription factors binding to the thymidine kinase promoter, in human normal compared to tumor cells in culture before and after ionizing radiation. Methods and Materials: Northern blot, dot-blot, and thymidine kinase enzyme assays were used to observe thymidine kinase transcript and enzymatic changes before and after radiation. Temporal expression of thymidine kinase transcripts following an optimal induction dose of radiation was also studied. Gel mobility shift assays were performed using a 95-base pair fragment of the thymidine kinase promoter (containing the CCAAT box) to analyze transcription factor binding. Results: Thymidine kinase transcript and enzymatic levels were higher in human tumor compared to normal cells. In contrast, levels of x-ray-activated thymidine kinase transcription factors were not significantly different in human neoplastic compared to normal cells. Conclusion: Elevated x-ray-induced thymidine kinase transcripts, enzymatic levels, and transcription factors are consistent with the loss of stringent cell growth regulation associated with neoplastic cells. The induction of thymidine kinase following ionizing radiation may be exploited in chemotherapeutic strategies which use halogenated pyrimidines and/or in various gene therapy strategies.

AB - Purpose: We investigated the induction of thymidine kinase transcription and enzymatic activity, and the activation of transcription factors binding to the thymidine kinase promoter, in human normal compared to tumor cells in culture before and after ionizing radiation. Methods and Materials: Northern blot, dot-blot, and thymidine kinase enzyme assays were used to observe thymidine kinase transcript and enzymatic changes before and after radiation. Temporal expression of thymidine kinase transcripts following an optimal induction dose of radiation was also studied. Gel mobility shift assays were performed using a 95-base pair fragment of the thymidine kinase promoter (containing the CCAAT box) to analyze transcription factor binding. Results: Thymidine kinase transcript and enzymatic levels were higher in human tumor compared to normal cells. In contrast, levels of x-ray-activated thymidine kinase transcription factors were not significantly different in human neoplastic compared to normal cells. Conclusion: Elevated x-ray-induced thymidine kinase transcripts, enzymatic levels, and transcription factors are consistent with the loss of stringent cell growth regulation associated with neoplastic cells. The induction of thymidine kinase following ionizing radiation may be exploited in chemotherapeutic strategies which use halogenated pyrimidines and/or in various gene therapy strategies.

KW - DNA binding proteins

KW - Enzymatic assay

KW - Ionizing radiation

KW - Nuclear extracts

KW - Transcription factors

UR - http://www.scopus.com/inward/record.url?scp=0027939874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027939874&partnerID=8YFLogxK

U2 - 10.1016/0360-3016(94)90019-1

DO - 10.1016/0360-3016(94)90019-1

M3 - Article

C2 - 7928466

AN - SCOPUS:0027939874

VL - 30

SP - 391

EP - 398

JO - International Journal of Radiation Oncology Biology Physics

JF - International Journal of Radiation Oncology Biology Physics

SN - 0360-3016

IS - 2

ER -