First identification of endocrine disruptors in algae blooms
2011-02-17
(Press-News.org) Scientists are reporting for the first time that previously unrecognized substances released by algae blooms have the potential to act as endocrine disruptors, which can interfere with the normal activity of reproductive hormones. The effect is not caused by microcystin toxins, long recognized as potentially harmful to humans and aquatic animals, but as yet unidentified substances. As a result, the scientists are calling for a revision of environmental monitoring programs to watch for these new substances. The findings appear in ACS's journal Environmental Science & Technology.
Theodore Henry and colleagues note that harmful blooms of toxin-producing algae, called cyanobacteria or blue-green algae, occur in waters throughout the world and are a growing health and environmental concern. The algae produce microcystins that can harm fish, plants, and human health. Possible human health effects include skin rashes, fever, and liver damage. Although scientists have focused mainly on microcystins' biological effects, new evidence suggests that other potentially harmful substances also may be present.
In an effort to find out, Emily Rogers supervised by Theodore Henry, and co-authors Michael Twiner, Julia Gouffon, Jackson McPherson, Gregory Boyer, Gary Sayler, and Steven Wilhelm turned to zebrafish, often used as a stand-in for people and other animals in laboratory experiments. They found that something released by algae, other than microcystins, had an endocrine disrupting effect on the fish. The report recommends that environmental protection agencies may need to update monitoring programs for algae blooms to include potential endocrine-disrupting substances.
INFORMATION:
The scientists acknowledge funding from the National Oceanic and Atmospheric Administration.
ARTICLE FOR IMMEDIATE RELEASE
"Global gene expression profiling in larval zebrafish exposed to microcystin-LR and Microcystis reveals endocrine disrupting effects of cyanobacteria"
DOWNLOAD FULL TEXT ARTICLE
http://pubs.acs.org/stoken/presspac/presspac/full/10.1021/es103538b
CONTACT:
Theodore Henry, Ph.D.
School of Biomedical and Biological Sciences
The University of Plymouth
Plymouth, United Kingdom
Phone: 44-(0)-1752-584658
Email: ted.henry@plymouth.ac.uk
END
ELSE PRESS RELEASES FROM THIS DATE:
2011-02-17
A long, urgent search for proteins in the blood of pregnant women that could be used in early diagnosis of ectopic pregnancy (EP) has resulted in discovery of biomarkers that seem to be specific enough to begin testing in clinical trials, scientists are reporting in a new study in ACS's Journal of Proteome Research.
David Speicher and colleagues explain that ectopic pregnancy happens when an embryo does not attach normally inside the mother's uterus, but instead attaches and begins growing elsewhere. Most occur inside one of the Fallopian tubes, which link the ovaries ...
2011-02-17
Scientists in Hungary are reporting that the potential health effects of last October's Red Mud Disaster, one of the worst environmental accidents in Europe, may be less dangerous than previously feared. Their study, reported in ACS's journal Environmental Science & Technology, concludes that the dust from the mud may be no more harmful than particles of ordinary urban air pollution.
Mihály Pósfai and colleagues point out that a burst dam at a factory that processes aluminum ore last October inundated areas near Ajka in northern Hungary with more than 700,000 cubic yards ...
2011-02-17
A Massachusetts General Hospital (MGH) study has identified a new role for an important enzyme in preparing lung tissue for the development of metastases. Published in the early edition of Proceedings of the National Academy of Sciences, the report describes how focal adhesion kinase (FAK) is involved in producing areas of vascular leakiness in lung tissue – known to be part of the premetastatic process – and increases expression of a molecule that attracts cancer cells to potential metastatic sites.
"Blood from all tissues of the body travels to the lungs for oxygenation, ...
2011-02-17
CHAMPAIGN, Ill. – A new study from the University of Illinois concludes that very high biomass prices would be needed in order to meet the ambitious goal of replacing 30 percent of petroleum consumption in the U.S. with biofuels by 2030.
A team of researchers led by Madhu Khanna, a professor of agricultural and consumer economics at Illinois, shows that between 600 and 900 million metric tons of biomass could be produced in 2030 at a price of $140 per metric ton (in 2007 dollars) while still meeting demand for food with current assumptions about yields, production costs ...
2011-02-17
Poised at the starting gate are palm oil, sugar cane, corn cobs, and switch grass. On your mark, get set... This is not a race among fruits and vegetables, but instead a real-life contest to decide which biofuel raw materials and technologies make it to the gas pump. That quest to develop a sustainable supply of affordable biofuels and bring them to the market is the topic of the cover story in the current edition of Chemical & Engineering News (C&EN), ACS's weekly newsmagazine.
C&EN Senior Correspondent Stephen Ritter notes that scientists have largely met the technical ...
2011-02-17
TORONTO, Ont., February 16, 2011 — One in five homeless people with tuberculosis die within a year of their diagnosis, according to a study led by St. Michael's Hospital's Dr. Kamran Khan. And that number remains unchanged over the last decade despite recommendations calling for greater improvements in prevention and control of tuberculosis in homeless shelters.
A provincial coroner's inquest into the death of Joseph Teigesser, a homeless man who died of tuberculosis in Toronto in 2001, made 13 formal recommendations. These included provincial funding for a centralized ...
2011-02-17
On 7 February 2011, the German Institute for Quality and Efficiency in Health Care (IQWiG) published the results of a search update for evidence-based clinical practice guidelines on coronary heart disease (CHD). The aim of the report is to identify those recommendations from current guidelines of high methodological quality that may be relevant for the planned revision of the corresponding disease management programme (DMP). According to the results of the report, there is no compelling need for revision of any part of the DMP. However, IQWiG identified various aspects ...
2011-02-17
COLLEGE PARK, Md. - Great works and praiseworthy behavior may bring respect and admiration, but these won't help us to escape blame when we do something wrong, says a new study by researchers at the University of Maryland and Harvard University. To do that, the researchers say, one needs to be a victim not a hero!
In the study, participants responded to a number of scenarios that mirrored real-life moral transgressions, from stealing money to harming someone. Results revealed that, no matter how many previous good deeds someone had done, they received just as much blame ...
2011-02-17
EAST LANSING, Mich. — College students who consider dropping out are particularly sensitive to a handful of critical events including depression and loss of financial aid, according to a study led by Michigan State University scholars.
Surprisingly, however, other events such as a death in the family and students' failure to get their intended major did not have a significant influence on their intention to drop out, said Tim Pleskac, MSU assistant professor of psychology and lead researcher on the project.
By identifying which risks prompt students to consider quitting, ...
2011-02-17
Unlike Pinocchio, liars do not usually give telltale signs that they are being dishonest. In lieu of a growing nose, is there a way to distinguish people who are telling the truth from those who aren't? A new report in Psychological Science in the Public Interest, a journal of the Association for Psychological Science, discusses some of the common misconceptions about those proficient in the art of deception, reviews the shortcomings of commonly used lie-detection techniques, and presents new empirically supported methods for telling liars from truth-tellers with greater ...
LAST 30 PRESS RELEASES:
[Press-News.org] First identification of endocrine disruptors in algae blooms
