Estrogen-DNA adducts are potential biomarkers for assessing the risk and development of estrogen-associated cancers. 4-Hydroxyequilenin (4-OHEN) and 4-hydroxyequilin (4-OHEQ), the metabolites of equine estrogens present in common hormone replacement therapy (HRT) formulations, are capable of producing bulky 4-OHEN-DNA adducts. Although the formation of 4-OHEN-DNA adducts has been reported, thei...

The use of the antiestrogen tamoxifen (TAM) is associated with an increase in endometrial cancer. TAM-induced endometrial carcinogenesis may proceed through a genotoxin-mediated pathway, although the detection of endometrial TAM-DNA adducts in exposed women is still controversial. In this study, a monkey model has been used to investigate the question of TAM-DNA adduct formation in primates. Tw...

BACKGROUND DNA adducts are widely used marker of DNA damage induced by environmental pollutants. The present study was designed to explore whether sperm polycyclic aromatic hydrocarbon-DNA adducts were associated with sperm DNA integrity and semen quality. METHODS A total of 433 Han Chinese men were recruited from an infertility clinic. Immunofluorescence was applied to analyze sperm PAH-DNA ...

Two different types of DNA adducts are formed from many aromatic amines by bioactivation: N-acetylated and nonacetylated, arylamine DNA adducts. It has become clear from experiments using N-acetyl-2-aminofluorene and 2-aminofluorene adducts to C8 of deoxyguanosine that these two types of adducts may have different effects on DNA structure and DNA replication. We have determined blocking of DNA ...

A long-term treatment with tamoxifen (TAM) to women increases the risk of developing endometrial cancer. The cancer may result from genotoxic damage induced by this drug. In fact, TAM-DNA adducts were detected in the liver of rats treated with TAM and initiated to develop hepatocellular carcinomas. To explore the distribution and repair rate of TAM-DNA adducts, the level of TAM-DNA adducts in a...

White blood cell DNA adducts were measured in coke oven workers, in residents from the area next to the coke oven in Silesia, Poland (highly industrialized region), and in residents from the rural area of Poland using the 32P-postlabeling technique. This method detected aromatic adducts including adducts formed by polycyclic aromatic hydrocarbons (PAHs). Highest levels of adducts in DNA were se...

BACKGROUND Ellipticine and doxorubicin are antineoplastic agents, whose action is based mainly on DNA damage such as intercalation, inhibition of topoisomerase II and formation of covalent DNA adducts. The key target to resolve which of these mechanisms are responsible for ellipticine and doxorubicin anticancer effects is the development of suitable methods for identifying their individual DNA-...

A 32P-postlabeling procedure for identifying and quantifying hydrophobic DNA adducts was developed (by modifying the method of Randerath and co-workers) in which labeled adducts are separated by high-performance liquid chromatography (HPLC) and quantified by liquid scintillation counting. This method was first developed for fluoranthene-DNA adducts, and methods for optimal detection and quantif...

32P-HPLC is a recently published method to generate DNA adduct profiles after exposure to a complex of genotoxic substances. The low detection limit enables characterization of individual DNA adducts in the general population. The 32P-HPLC method was applied to human lymphocytes and granulocytes from Silesia, a polluted industrial region in the south of Poland. Human samples were collected at t...