Abstract:
:To elucidate the nature and kinetics of DNA strand breaks caused by low-energy Auger electron emitters, we compared the yields of DNA breaks in supercoiled pUC19 DNA in the presence of the (.)OH scavenger dimethyl sulfoxide (DMSO) after the decay of (125)I (1) in proximity to DNA after minor-groove binding ((125)I-iodoHoechst 33342, (125)IH) and (2) at a distance from DNA ((125)I-iodoantipyrine, (125)IAP). DMSO is efficient at protecting supercoiled plasmid DNA from the decay of (125)I free in solution (dose modification factor, DMF = 59 +/- 4) and less effective when the (125)I decays occur close to DNA (DMF = 3.8 +/- 0.3). This difference is due mainly to the inability of DMSO to protect DNA from the double-strand breaks produced by groove-bound (125)I (DMF = 1.0 +/- 0.2). Additionally, the fragmentation of plasmid DNA beyond the production of single-strand and double-strand breaks that is seen after the decay of (125)IH and not (125)IAP (Kassis et al., Radiat. Res. 151, 167-176, 1999) cannot be modified by DMSO. These results demonstrate that the mechanisms underlying double-strand breaks caused by the decay of (125)IH differ in nature from those caused by the decay of (125)IAP.
journal_name
Radiat Resjournal_title
Radiation researchauthors
Kassis AI,Harapanhalli RS,Adelstein SJsubject
Has Abstractpub_date
1999-11-01 00:00:00pages
530-8issue
5eissn
0033-7587issn
1938-5404journal_volume
152pub_type
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journal_title:Radiation research
pub_type: 杂志文章
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journal_title:Radiation research
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journal_title:Radiation research
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journal_title:Radiation research
pub_type: 杂志文章
doi:
更新日期:1992-06-01 00:00:00
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journal_title:Radiation research
pub_type: 杂志文章
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更新日期:1992-02-01 00:00:00
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更新日期:2020-04-01 00:00:00
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journal_title:Radiation research
pub_type: 杂志文章
doi:10.1667/RR1305.1
更新日期:2008-06-01 00:00:00
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journal_title:Radiation research
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更新日期:2014-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:2001-07-01 00:00:00
abstract::The effects of X irradiation on oligodendrocyte-type-2-astrocyte (O-2A) progenitor cells derived from different regions of the perinatal central nervous system (CNS) of rats were investigated in vitro. The O-2A progenitor cells can differentiate into either oligodendrocytes or type-2 astrocytes. The depletion of these...
journal_title:Radiation research
pub_type: 杂志文章
doi:
更新日期:1991-10-01 00:00:00
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journal_title:Radiation research
pub_type: 杂志文章
doi:
更新日期:1992-01-01 00:00:00
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journal_title:Radiation research
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doi:
更新日期:1998-11-01 00:00:00
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journal_title:Radiation research
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journal_title:Radiation research
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journal_title:Radiation research
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doi:
更新日期:1997-04-01 00:00:00
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journal_title:Radiation research
pub_type: 杂志文章
doi:
更新日期:1996-10-01 00:00:00
abstract::The toxicity of 137Cs in the beagle dog was investigated at the Inhalation Toxicology Research Institute (ITRI) and Argonne National Laboratory (ANL) as part of programs to evaluate the biological effects of both radionuclides in atomic bomb fallout and internally deposited fission-product radionuclides. In the ITRI s...
journal_title:Radiation research
pub_type: 杂志文章
doi:
更新日期:1996-11-01 00:00:00
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journal_title:Radiation research
pub_type: 杂志文章
doi:
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journal_title:Radiation research
pub_type: 杂志文章
doi:
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