DNA damage produced in V79 cells by DNA-incorporated iodine-123

A comparison with iodine-125

G. M. Makrigiorgos, R. M. Berman, Janina Baranowska-Kortylewicz, E. Bump, J. L. Humm, S. J. Adelstein, A. I. Kassis

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The neutral elution technique (pH 9.6) has been used to compare the damage produced in the DNA of V79 cells following the decay of the Auger-electron emitters 123I and 125I incorporated into DNA in the form of 5- [123I/125I]iodo-2'-deoxyuridine (123IdU, 125IdU) or after 60Co γ irradiation. Elution profiles of retained radioactivity versus eluted volume were generally found to be nonlinear and partially dependent on the cell treatment prior to elution. Plots of a suitable function of radioactivity retention on the filters versus total decays for 123I or 125I and dose (Gy) for γ radiation were linear. Assuming that each 125I decay produces one double-strand break (DSB), the 60Co efficiency in DSB production was found to be 53.4 DSBs/Gy/cell (or 17.8 DSBs/Gy/1012 Da), in agreement with values reported previously. The decay of 123I led to 0.74 DSB/decay/cell if decays occurring only during nonrepair conditions were counted. This DSB production efficiency is in agreement with Monte Carlo semiempirical models of the action of radiation on DNA.

Original languageEnglish (US)
Pages (from-to)309-314
Number of pages6
JournalRadiation Research
Volume129
Issue number3
DOIs
StatePublished - Apr 29 1992

Fingerprint

iodine 125
iodine
Iodine
DNA damage
DNA Damage
deoxyribonucleic acid
deterioration
damage
strands
elution
DNA
decay
cells
Radioactivity
radioactivity
Radiation Dosage
Deoxyuridine
emitters (equipment)
Electrons
radiation

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Biophysics
  • Radiation

Cite this

Makrigiorgos, G. M., Berman, R. M., Baranowska-Kortylewicz, J., Bump, E., Humm, J. L., Adelstein, S. J., & Kassis, A. I. (1992). DNA damage produced in V79 cells by DNA-incorporated iodine-123: A comparison with iodine-125. Radiation Research, 129(3), 309-314. https://doi.org/10.2307/3578031

DNA damage produced in V79 cells by DNA-incorporated iodine-123 : A comparison with iodine-125. / Makrigiorgos, G. M.; Berman, R. M.; Baranowska-Kortylewicz, Janina; Bump, E.; Humm, J. L.; Adelstein, S. J.; Kassis, A. I.

In: Radiation Research, Vol. 129, No. 3, 29.04.1992, p. 309-314.

Research output: Contribution to journalArticle

Makrigiorgos, GM, Berman, RM, Baranowska-Kortylewicz, J, Bump, E, Humm, JL, Adelstein, SJ & Kassis, AI 1992, 'DNA damage produced in V79 cells by DNA-incorporated iodine-123: A comparison with iodine-125', Radiation Research, vol. 129, no. 3, pp. 309-314. https://doi.org/10.2307/3578031
Makrigiorgos, G. M. ; Berman, R. M. ; Baranowska-Kortylewicz, Janina ; Bump, E. ; Humm, J. L. ; Adelstein, S. J. ; Kassis, A. I. / DNA damage produced in V79 cells by DNA-incorporated iodine-123 : A comparison with iodine-125. In: Radiation Research. 1992 ; Vol. 129, No. 3. pp. 309-314.
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