Journal Article

DNA damage, DNA repair rates and mRNA expression levels of cell cycle genes (<i>TP53</i>, <i>p</i><i>21<sup>CDKN1A</sup></i>, <i>BCL2</i> and <i>BAX</i>) with respect to occupational exposure to styrene

Monika Hanova, Ludmila Vodickova, Radka Vaclavikova, Zdenek Smerhovsky, Rudolf Stetina, Pavel Hlavac, Alessio Naccarati, Jana Slyskova, Veronika Polakova, Pavel Soucek, Rajiv Kumar, Kari Hemminki and Pavel Vodicka

in Carcinogenesis

Volume 32, issue 1, pages 74-79
Published in print January 2011 | ISSN: 0143-3334
Published online October 2010 | e-ISSN: 1460-2180 | DOI: https://dx.doi.org/10.1093/carcin/bgq213
DNA damage, DNA repair rates and mRNA expression levels of cell cycle genes (TP53, p21CDKN1A, BCL2 and BAX) with respect to occupational exposure to styrene

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We studied the relationship between DNA damage, DNA repair rates and messenger RNA (mRNA) expression levels of cell cycle genes TP53, p21CDKN1A, BCL2 and BAX in a group of 71 styrene-exposed workers and 51 control individuals. The exposure was assessed by measuring the concentration of styrene at workplace and in blood. Parameters of DNA damage [measured as single-strand breaks (SSBs) and endonuclease III-sensitive sites], γ-irradiation-specific DNA repair rates and mRNA levels of studied genes were analyzed in peripheral blood lymphocytes. The workers were divided into low (<50 mg/m3) and high (>50 mg/m3) styrene exposure groups. We found negative correlations between mRNA expression of TP53, BCL2, BAX and styrene exposure (P < 0.001 for all parameters). In contrast, p21CDKN1A mRNA expression significantly increased with increasing styrene exposure (P = 0.001). SSBs and endonuclease III-sensitive sites increased with increasing mRNA levels of TP53 (P < 0.001 for both) and BCL2 (P = 0.038, P = 0.002, respectively), whereas the same parameters decreased with increasing mRNA levels of p21CDKN1A (P < 0.001, P = 0.007, respectively). γ-Irradiation-specific DNA repair rates increased with p21CDKN1A mRNA levels up to the low exposure level (P = 0.044). Our study suggests a possible relationship between styrene exposure, DNA damage and transcript levels of key cell cycle genes.

Journal Article.  4361 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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