Acidic extracellular environment reduces the fixation of radiation damage
Journal Article
·
· Radiat. Res.; (United States)
Chinese hamster ovary cells in exponential growth were irradiated with ..gamma.. or X rays in an acidic or alkaline extracellular environment. Incubation in acid medium during or after irradiation reduced the degree of fixation of potentially lethal lesions. Fixation and repair of acid-modified damage occurred with a halftime of 9 to 10 min. The rate of repair of sublethal damage was unaffected by hydrogen ion concentration and progressed with a half-time of 30 min. An acid environment modified only survival of exponentially growing cells; unfed plateau-phase cultures were unaffected.
- Research Organization:
- Columbia Univ. Coll. of Physicians and Surgeons, New York, NY
- DOE Contract Number:
- AC02-78EV04733
- OSTI ID:
- 5245607
- Journal Information:
- Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 97:1; ISSN RAREA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
560121* -- Radiation Effects on Cells-- External Source-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METAL ISOTOPES
ANIMAL CELLS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
CELL KILLING
CESIUM 137
CESIUM ISOTOPES
CHO CELLS
DATA
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
ISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PH VALUE
RADIATION EFFECTS
RADIATIONS
RADIOINDUCTION
RADIOISOTOPES
RADIOSENSITIVITY
RADIOSENSITIVITY EFFECTS
RECOVERY
REPAIR
SURVIVAL CURVES
X RADIATION
YEARS LIVING RADIOISOTOPES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METAL ISOTOPES
ANIMAL CELLS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
CELL KILLING
CESIUM 137
CESIUM ISOTOPES
CHO CELLS
DATA
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
ISOTOPES
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PH VALUE
RADIATION EFFECTS
RADIATIONS
RADIOINDUCTION
RADIOISOTOPES
RADIOSENSITIVITY
RADIOSENSITIVITY EFFECTS
RECOVERY
REPAIR
SURVIVAL CURVES
X RADIATION
YEARS LIVING RADIOISOTOPES