Different contributions of the indirect effects of gamma-rays on the cytotoxicity in M10 and XRCC4 transfected M10 cells.

Different contributions of the indirect effects of gamma-rays on the cytotoxicity in M10 and XRCC4 transfected M10 cells. Research Abstract Details 

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Different contributions of the indirect effects of gamma-rays on the cytotoxicity in M10 and XRCC4 transfected M10 cells. Abstract Text:

Noriyuki Miyazaki,Hisako Nakano,Atsushi Ito,Kunio Shinohara,Noriyuki Miyazaki,Hisako Nakano,Atsushi Ito,Kunio Shinohara,

The protective effects of dimethyl sulfoxide (DMSO) against cell killing by (137)Cs gamma-rays were investigated in XRCC4-deficient cell line M10, XRCC4-complemented M10 and the parental mouse leukemia cell line L5178Y. Cell survival was determined by the colony-forming ability. M10 cells were more sensitive to gamma-ray-induced cell death than L5178Y and complemented M10 cells. Cell survival was increased in both M10 and L5178Y in the presence of DMSO. However, estimation of the DMSO-protectable fraction revealed a smaller protectable fraction for M10 cells than for L5178Y cells, indicating that indirect effects contributed in a smaller extent to the cytotoxicity in M10 than that in L5178Y. This effect is due to XRCC4 deficiency, since transfection of XRCC4 cDNA into M10 cells restored the radioprotective effects of DMSO to the level seen in L5178Y. In M10 cells, the killing effects of high LET radiation (Auger electrons from (125)I-antipyrine, carbon ions with an LET of 166 keV microm(-1)) were similar to those of low LET radiation ((137)Cs gamma-rays, characteristic X-rays from (125)I-bovine serum albumin). We discuss that lethal lesions produced by indirect actions in L5178Y and XRCC4-complemented M10 cells may differ, at least in part, from DNA double-strand breaks repairable by non-homologous end joining.

Different contributions of the indirect effects of gamma-rays on the cytotoxicity in M10 and XRCC4 transfected M10 cells. Publishing Authors By Initials

N Miyazaki,H Nakano,A Ito,K Shinohara,N Miyazaki,H Nakano,A Ito,K Shinohara,

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Different contributions of the indirect effects of gamma-rays on the cytotoxicity in M10 and XRCC4 transfected M10 cells. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Radiation and environmental biophysics

VOLUME: 46

Page Numbers: 237-46

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ISSN: 0301-634X

DAY: 4

MONTH: 05

YEAR: 2007

Different contributions of the indirect effects of gamma-rays on the cytotoxicity in M10 and XRCC4 transfected M10 cells. Information

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LANGUAGE: eng

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AFFILIATION: Tokyo Metropolitan Industrial Technology Research Institute, Komazawa Office, 2-11-1, Fukazawa, Tokyo, Japan. miyazaki.noriyuki@iri-tokyo.jp

Country: Germany

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MEDLINETA: Radiat Environ Biophys

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