Increased sensitivity of EBNA2-transformed rat fibroblasts to ionizing radiation
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چکیده
منابع مشابه
Lack of sensitivity of primary Fanconi's anemia fibroblasts to UV and ionizing radiation.
Clinical observations and theoretical considerations suggest some degree of radiosensitivity in Fanconi's anemia (FA), but experimental evidence remains controversial. We tested the sensitivity of primary skin fibroblast cultures from all known FA complementation groups to ionizing radiation and ultraviolet light using conventional cell growth and colony formation assays. In contrast to previou...
متن کاملIncreased tumorigenicity and sensitivity to ionizing radiation upon loss of chromosomal protein HMGN1.
We report that loss of HMGN1, a nucleosome-binding protein that alters the compaction of the chromatin fiber, increases the cellular sensitivity to ionizing radiation and the tumor burden of mice. The mortality and tumor burden of ionizing radiation-treated Hmgn1-/- mice is higher than that of their Hmgn1+/+ littermates. Hmgn1-/- fibroblasts have an altered G2-M checkpoint activation and are hy...
متن کاملEffect of age on the sensitivity of the rat thyroid gland to ionizing radiation
Exposure to ionizing radiation during childhood is a well-known risk factor for thyroid cancer. Our study evaluated the effect of age on the radiosensitivity of rat thyroid glands. Four-week-old (4W), 7 -week-old (7W), and 8-month-old (8M) male Wistar rats were exposed to 8 Gy of whole-body X-ray irradiation. Thyroids were removed 3-72 h after irradiation, and non-irradiated thyroids served as ...
متن کاملPhosphorylation of p53 modifies sensitivity to ionizing radiation.
Phosphorylation is an important modification involved in the control of p53 activity. We examined the relationship between p53 phosphorylation and cell radiosensitivity. We prepared H1299 cells (p53-null) with various mutations of p53 at three sites (serine 15, 20 and 46) and examined the radiosensitivity of the cells. In three mutant forms of p53--S15A, S20A and S46A--serine was converted to a...
متن کاملSuperoxide dismutase amplifies organismal sensitivity to ionizing radiation.
Although increased superoxide dismutase (SOD) activity is often associated with enhanced resistance of cells and organisms to oxidant challenges, few direct tests of the antioxidant importance of this enzyme have been carried out. To assess the importance of SOD in defending against gamma-radiation, we employed Escherichia coli with deficient, normal, and super-normal enzyme activities. Surpris...
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ژورنال
عنوان ژورنال: International Journal of Cancer
سال: 1996
ISSN: 0020-7136,1097-0215
DOI: 10.1002/(sici)1097-0215(19961127)68:5<612::aid-ijc10>3.0.co;2-3