XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity.

XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Research Abstract Details 

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XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Abstract Text:

Eliza Grlickova-Duzevik,Sandra S Wise,Ray C Munroe,W Douglas Thompson,John Pierce Wise,

Hexavalent chromium Cr(VI) is a well known human carcinogen. This genotoxic metal induces DNA strand breaks and chromosome damage. However, the relationship between these lesions is uncertain. Our study focused on examining the role of XRCC1 in sodium chromate-induced cytotoxicity and chromosomal aberrations in Chinese Hamster Ovary (CHO) cells. Three different cell lines were used: AA8 (parental), EM9 (XRCC1 mutant) and H9T3 (EM9 complemented with human XRCC1 gene). Results show that concentration-dependent decreases in relative survival are similar in all three cell lines, indicating that XRCC1 is not crucial for protecting cells from sodium chromate-induced cytotoxicity. Similarly the frequency of damaged metaphase cells was not affected by XRCC1 deficiency. However, the total number of Cr(VI)-induced chromosome aberrations was exacerbated by XRCC1 deficiency and the spectrum of chromosome damage changed dramatically. Specifically, chromatid and isochromatid lesions were the most prominent aberrations induced in the cell lines and XRCC1 was essential to reduce the formation of chromatid lesions. In addition, XRCC1 deficiency caused a dramatic increase in the number of chromatid exchanges indicating that it is involved in protection from Cr(VI)-induced chromosome instability.

XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Publishing Authors By Initials

E Grlickova-Duzevik,SS Wise,RC Munroe,WD Thompson,JP Wise,

For similar natural sciences: time: time factors research abstracts see: natural sciences: time: time factors research

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XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Journal Published:

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

Journal: Mutation research

VOLUME: 610

Page Numbers: 31-7

Journal Abbreviation: Mutat. Res.

ISSN: 0027-5107

DAY: 14

MONTH: 08

YEAR: 2006

XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Information

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LANGUAGE: eng

NlmUniqueID: 400763

XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Keywords Mesh Terms:

KEYWORDS: Time Factors

MESH TERMS: toxicity

Chemical & Substance for Abstract: XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity. Information

Substance Name: sodium chromate(VI)

Registry Number: 7775-11-3

Grant and Affiliation Information for XRCC1 protects cells from chromate-induced chromosome damage, but does not affect cytotoxicity.

AFFILIATION: Wise Laboratory of Environmental and Genetic Toxicology, University of Southern Maine, 96 Falmouth St., P.O. Box 9300, Portland, ME 04104-9300, United States.

Country: Netherlands

AGENCY: United States NIEHS

GRANT: ES10838

ACRONYM: ES

MEDLINETA: Mutat Res

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