Dear MARMAM Colleagues, We are happy to announce our latest publication in Royal Society of Chemistry Advances: Maner, J., Burkard, M., Cassano, J., Bengtson Nash, S., Schirmer, K., & Suter, M. Hexachlorobenzene exerts genotoxic effects in a humpback whale cell line under stable exposure conditions. Royal Society of Chemistry Advances 9:39447 In this paper, we build upon species-specific toxicological effect data using the Humpback Whale immortalised cell line developed within our team. Abstract Humpback whales, like other polar wildlife, accumulate persistent organic pollutants. In Southern hemisphere populations, hexachlorobenzene (HCB) dominates the contaminant profiles. HCB is linked to a variety of health effects and is classified as a group 2B carcinogen, but the mechanism of action is a matter of contention. Potential toxicological effects to humpback whales remain entirely unknown. The recently established humpback whale fibroblast cell line (HuWa) offers an in vitro model for toxicological investigations. We here combine this novel cell line with a passive dosing strategy to investigate whale-specific toxicity of HCB. The relevant partitioning coefficients were determined to produce stable and predictable exposure concentrations in small-scale bioassays. The system was used to assess acute toxicity as well as genotoxicity of HCB to the HuWa cell line. While we found some transient reductions in metabolic activity, measured with the indicator dye alamarBlue, no clear acute toxic effects were discernible. Yet, a significant increase in DNA damage, detected in the alkaline comet assay, was found in HuWa cells exposed to 10 μg L−1 HCB during the sensitive phase of cell attachment. Collectively, this work provides a ready-to-use passive dosing system and delivers evidence that HCB elicits genotoxicity in humpback whale cells. Link to full text: https://pubs.rsc.org/en/content/articlelanding/2019/ra/c9ra05352b#!divAbstra... Hexachlorobenzene exerts genotoxic effects in a humpback whale cell line under stable exposure conditions - RSC Advances (RSC Publishing) <https://pubs.rsc.org/en/content/articlelanding/2019/ra/c9ra05352b#!divAbstract> Humpback whales, like other polar wildlife, accumulate persistent organic pollutants. In Southern hemisphere populations, hexachlorobenzene (HCB) dominates the contaminant profiles. HCB is linked to a variety of health effects and is classified as a group 2B carcinogen, but the mechanism of action is a matter of co pubs.rsc.org All the best regards, Susan Associate Professor Susan Bengtson Nash Program Director Southern Ocean Persistent Organic Pollutants Program (SOPOPP) SCAR: Chair of ImPACT | ARC: College of Experts | Scientific Reports: Editor Environmental Futures Research Institute (EFRI), Griffith University, Nathan Campus. 170 Kessels Road, Nathan, QLD 4111, Australia. Email: s.bengtsonnash@griffith.edu.au | Phone: +61 (0)7 3735 5062 | Mobile: +61 (0)437 888 711 Twitter: @Antarctica_POPs | Skype: s.bengtsonnash | Website: http://www.griffith.edu.au/environment-planning-architecture/southern-ocean-... [cid:a78f9ced-24e2-4507-9b4a-897e41043611]
