Combined effect of diethyldithiocarbamate (DDC) and modest hyperthermia on chinese hamster (V79) cell survival and DNA strand break repair following photon irradiation

Henry Wagner, David R. Parkinson, Hywel Madoc-Jones, Edward S. Sternick, Kimberly Vrusho, Frank Krasin

Research output: Contribution to journalArticle

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Abstract

Previous studies from our institution have shown that 10-4 M DDC enhances the effects of radiation and of hyperthermia treatment at 43°C on the killing of Chinese hamster (DON) cells. We herein report studies on the combined effect seen at more modest temperatures (41 °C) which can be achieved in humans by whole body heating without the need for general anesthesia. Treatment of V79 cells with DDC for 60 minutes at 37°C or 41 °C had minimal toxicity at concentrations up to 5 × 10-5 M. When cells were irradiated with single doses up to 1000 rad (137Cs, 350 rad/min), pre-incubation with 10-4 M DDC had no effect on cell survival at 37°C, but markedly decreased survival at 41 °C (D37 = 475 rad without DDC, 270 rad with DDC). The mechanism of this increased cell killing is not known. We observed, however, that there is no repair of DNA single strand breaks in DNA from irradiated V79 cells previously held at 41 °C in the presence of 10-4 M DDC. Without DDC, repair of SSB was similar at 37°C and 41°C.

Original languageEnglish (US)
Pages (from-to)1575-1579
Number of pages5
JournalInternational Journal of Radiation Oncology, Biology, Physics
Volume10
Issue number9
DOIs
StatePublished - Sep 1984

Fingerprint

Ditiocarb
DNA Breaks
hamsters
hyperthermia
Cricetulus
Photons
strands
Cell Survival
Fever
deoxyribonucleic acid
irradiation
photons
cells
anesthesia
toxicity
Single-Stranded DNA Breaks
Radiation Effects
dosage
heating
Human Body

All Science Journal Classification (ASJC) codes

  • Radiation
  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research

Cite this

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title = "Combined effect of diethyldithiocarbamate (DDC) and modest hyperthermia on chinese hamster (V79) cell survival and DNA strand break repair following photon irradiation",
abstract = "Previous studies from our institution have shown that 10-4 M DDC enhances the effects of radiation and of hyperthermia treatment at 43°C on the killing of Chinese hamster (DON) cells. We herein report studies on the combined effect seen at more modest temperatures (41 °C) which can be achieved in humans by whole body heating without the need for general anesthesia. Treatment of V79 cells with DDC for 60 minutes at 37°C or 41 °C had minimal toxicity at concentrations up to 5 × 10-5 M. When cells were irradiated with single doses up to 1000 rad (137Cs, 350 rad/min), pre-incubation with 10-4 M DDC had no effect on cell survival at 37°C, but markedly decreased survival at 41 °C (D37 = 475 rad without DDC, 270 rad with DDC). The mechanism of this increased cell killing is not known. We observed, however, that there is no repair of DNA single strand breaks in DNA from irradiated V79 cells previously held at 41 °C in the presence of 10-4 M DDC. Without DDC, repair of SSB was similar at 37°C and 41°C.",
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Combined effect of diethyldithiocarbamate (DDC) and modest hyperthermia on chinese hamster (V79) cell survival and DNA strand break repair following photon irradiation. / Wagner, Henry; Parkinson, David R.; Madoc-Jones, Hywel; Sternick, Edward S.; Vrusho, Kimberly; Krasin, Frank.

In: International Journal of Radiation Oncology, Biology, Physics, Vol. 10, No. 9, 09.1984, p. 1575-1579.

Research output: Contribution to journalArticle

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AU - Krasin, Frank

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