Andreas Kortenkamp

Estrogens and genomic instability in human breast cancer cells--involvement of Src/Raf/Erk signaling in micronucleus formation by estrogenic chemicals (2008)

Kabil, Alena, Silva, Elisabete, Kortenkamp, Andreas

Reports of the ability of estrogenic agents such as 17β-estradiol (E2), estriol (E3) and bisphenol A (BPA) to induce micronuclei (MN) in MCF-7 breast cancer cells have prompted us to investigate...

Dysgenesis and Histological Changes of Genitals and Perturbations of Gene Expression in Male Rats after In Utero Exposure to Antiandrogen Mixtures (2007)

Metzdorff, Stine Broeng, Dalgaard, Majken, Christiansen, Sofie, Axelstad, Marta, Hass, Ulla, Kiersgaard, Maria Kristina, ...

We investigated the ability of a mixture of three androgen receptor antagonists to induce disruption of male sexual differentiation after perinatal exposure. The aim was to assess whether the joint...

Defining the Impact of Weakly Estrogenic Chemicals on the Action of Steroidal Estrogens (2001)

Rajapakse, Nissanka, Ong, Delia, Kortenkamp, Andreas

We tested whether bisphenol A (BPA) or o,p′-DDT, when combined with 17&bgr;-estradiol (E2), would contribute to the overall mixture effect using a yeast reporter gene assay, the yeast estrogen...

Genotypic selection of mutated DNA sequences using mismatch cleavage analysis, a possible basis for novel mutation assays (1997)

Kortenkamp, Andreas, Jones, Chris, Baker, Jon

A novel technique for the selection of mutated DNA sequences, termed mismatch cleavage-polymerase chain reaction (MC-PCR), is proposed. The method is based on hybridizing genomic DNA with a suitable...

The formation of both apurinic/apyrimidinic sites and single-strand breaks by chromate and glutathione arises from attack by the same single reactive species and is dependent on molecular oxygen (1995)

Casadevall, Montserrat, Kortenkamp, Andreas

The induction of apurinic/apyrimidinic sites (AP sites) and DNA single-strand breaks (SSB) by chromate and glutathione in isolated DNA was investigated using agents that cleave the DNA at AP sites...

The formation of DNA cleaving species during the reduction of chromate by ascorbate (1994)

Da Cruz Fresco, Paula, Kortenkamp, Andreas

A detailed study of the ability of chromate in combination with ascorbate to induce DNA single-strand breaks in the absence of iron(II) and copper(II) has been carried out. In solutions containing 1...

The generation of apurinic/apyrimidinic sites in isolated DNA during the reduction of chromate by glutathione (1994)

Casadevall, Montserrat, Kortenkamp, Andreas

We have obtained evidence for the induction of apurinic/apyrimidinic sites (AP-sites) in isolated DNA treated with chromate and glutathione using agents that cleave the DNA phosphate backbone at...

Defining conditions for the efficient in vitro cross-linking of proteins to DNA by chromium(III) compounds (1992)

Kortenkamp, Andreas, Curran, Brendan, O'Brien, Paul

The formation of cross-links between bovine serum albumin and DNA in the presence of chromium(III) chloride was found to be highly pH dependent. In vitro, such lesions were only formed at acidic...

Studies of the binding of chromium(III) complexes to phosphate groups of adenosine triphosphate (1991)

Kortenkamp, Andreas, O'Brien, Paul

The binding of a number of chromium complexes to ATP has been studied by 31P NMR spactroscopy. The results are consistent with the formation of outer-sphere complexes between ATP and the chromum...

The reduction of chromate is a prerequisite of chromium binding to cell nuclei (1991)

Kortenkamp, Andreas, O'Brien, Paul, Beyersmann, Detmar

Isolated calf thymus nuclei bound a chromium(III) glutathione complex in a time-dependent manner. In contrast chromium(VI) (sodium chromate) did not bind. However, when chromate was incubated with...

Combining xenoestrogens at levels below individual no-observed-effect concentrations dramatically enhances steroid hormone action.

Rajapakse, Nissanka, Silva, Elisabete, Kortenkamp, Andreas

The low potency of many man-made estrogenic chemicals, so-called xenoestrogens, has been used to suggest that risks arising from exposure to individual chemicals are negligible. Another argument used...

Combining xenoestrogens at levels below individual no-observed-effect concentrations dramatically enhances steroid hormone action.

Rajapakse, Nissanka, Silva, Elisabete, Kortenkamp, Andreas

The low potency of many man-made estrogenic chemicals, so-called xenoestrogens, has been used to suggest that risks arising from exposure to individual chemicals are negligible. Another argument used...

Ten Years of Mixing Cocktails: A Review of Combination Effects of Endocrine-Disrupting Chemicals

Kortenkamp, Andreas

In the last 10 years, good evidence has become available to show that the combined effects of endocrine disruptors (EDs) belonging to the same category (e.g., estrogenic, antiandrogenic, or...