Navigation Links
Estrogen linked to lowered immunity in fish
Date:6/3/2009

Exposure to estrogen reduces production of immune-related proteins in fish. This suggests that certain compounds, known as endocrine disruptors, may make fish more susceptible to disease.

The research may provide new clues for why intersex fish, fish kills and fish lesions often occur together in the Shenandoah and Potomac rivers. The tests were conducted in a lab by scientists from the U.S. Geological Survey.

The study, led by USGS genomics researcher Dr. Laura Robertson, revealed that largemouth bass injected with estrogen produced lowered levels of hepcidin, an important iron-regulating hormone in mammals that is also found in fish and amphibians. This is the first published study demonstrating control of hepcidin by estrogen in any animal.

Besides being an important iron-regulating hormone, researchers also suspect that hepcidin may act as an antimicrobial peptide in mammals, fish and frogs. Antimicrobial peptides are the first line of defense against disease-causing bacteria and some fungi and viruses in vertebrate animals.

"Our research suggests that estrogen-mimicking compounds may make fish more susceptible to disease by blocking production of hepcidin and other immune-related proteins that help protect fish against disease-causing bacteria," said Robertson.

USGS researchers Drs. Vicki Blazer and Luke Iwanowicz have previously found intersex occurring in fish in the Potomac and Shenandoah rivers. Intersex is primarily revealed in male fish that have immature female egg cells in their testes. Because other studies have shown that estrogen and estrogen-mimicking compounds can cause intersex, the co-occurrence of fish lesions, fish kills and intersex in these two rivers suggested to USGS scientists that estrogen-mimicking compounds could be involved in the fish lesions and fish kills in addition to being a possible cause of intersex traits.

That caused Robertson and her colleagues to investigate
'/>"/>

Contact: Laura Robertson
lrobertson@usgs.gov
304-724-4579
United States Geological Survey
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Estrogen May Help Mens Hearts
2. Penn State professor investigates estrogen, heart disease connection in women
3. Estrogen May Combat Marijuanas Effect on Cognition
4. New study suggests Rx estrogen delivery through the skin may show safety benefits as opposed to oral delivery
5. Naturally produced estrogen may protect women from Parkinsons disease
6. Estrogen found to increase growth of the most common childhood brain tumor
7. Estrogen pills can benefit women with metastatic breast cancer
8. FDA Approves Durameds Synthetic Conjugated Estrogens-A Vaginal Cream
9. Estrogen therapy could be dangerous for women with existing heart risk
10. Estrogen May Explain Why Women With Cystic Fibrosis Suffer More
11. Estrogen and progesterone receptor isoforms expression in the stomach of Mongolian gerbils
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/27/2014)... August 27, 2014 The Global and ... study on the current state of the Maleic Anhydride ... a basic overview of the industry, including definitions, applications ... domestic market analysis are provided with a focus on ... A comparison between the international and Chinese situation is ...
(Date:8/27/2014)... IQ Formulations , a leading manufacturer of ... of the Cystic Fibrosis Foundation. For an entire month ... led by TigerFitness.com in which 5 percent of the ... to the respected nonprofit organization. , Last year, ... Isla, a young girl fighting Cystic Fibrosis. The company ...
(Date:8/27/2014)... 27, 2014 Aspirus Wausau Hospital today ... US with Buzz™ Digital O.R. at Aspirus Wausau Hospital, ... 13 new operating rooms will be Buzz, a centralized ... integrative system supports planning, navigation, imaging and communications connectivity. ... of intuitive software and hardware all controlled from the ...
(Date:8/27/2014)... August 27, 2014 SCOTT Sports ... Park, Utah’s first indoor mountain bike and BMX park. ... park-style bikes in both adult and youth sizes for the ... operated a distribution warehouse in Ogden, Utah, recently moved its ... , “We are proud to be a partner with the ...
(Date:8/27/2014)... Steven Reinberg HealthDay Reporter ... hormone used to reduce the need for blood transfusions might ... suggests. Synthetic erythropoietin (EPO), which stimulates red blood cell ... preterm birth, said lead researcher Dr. Petra Huppi, a professor ... in Switzerland. "The real test of whether EPO protects ...
Breaking Medicine News(10 mins):Health News:Maleic Anhydride Industry & Isoprene Market Global and China Analysis Now Available at ReportsnReports.com 2Health News:Maleic Anhydride Industry & Isoprene Market Global and China Analysis Now Available at ReportsnReports.com 3Health News:Maleic Anhydride Industry & Isoprene Market Global and China Analysis Now Available at ReportsnReports.com 4Health News:Maleic Anhydride Industry & Isoprene Market Global and China Analysis Now Available at ReportsnReports.com 5Health News:IQ Formulations Contributes Sizeable Donation to Cystic Fibrosis Foundation 2Health News:Aspirus Wausau Hospital Announces First Large Scale Digital Operating Room Integration Project in the US 2Health News:Aspirus Wausau Hospital Announces First Large Scale Digital Operating Room Integration Project in the US 3Health News:SCOTT Sports to Sponsor Wasatch Indoor Bike Park 2Health News:Hormone Might Help Preemies' Brains 2Health News:Hormone Might Help Preemies' Brains 3
... WASHINGTON, DCThrough the identification of a gene,s impact on ... Center continue to make progress in understanding the ... repair of white matter, known as myelination. The study, ... of The Journal of Neuroscience , identified ...
... of the 5.3 million men and women seen in Department ... that use of cocaine is predictive of open-angle glaucoma, the ... that after adjustments for race and age, current and former ... Men with open-angle glaucoma also had significant exposures to amphetamines ...
... found that patients had little or no control over their ... care, but a new study shows that this has changed ... with health coverage that includes a high deductible and either ... their costs even after they initiated care. ...
... THURSDAY, Sept. 29 (HealthDay News) -- The bellowing of male ... researchers report. They found that the largest koalas produce ... males that they,re the biggest dudes in the neighborhood. ... few animals with a descended larynx, which makes the vocal ...
... their everyday lives and with support from partners can continue ... of the preliminary findings of a two-year research project funded ... married couples living with dementia make decisions on a daily ... over issues such as what to eat or wear, as ...
... , WEDNESDAY, Sept. 28 (HealthDay News) -- Cancer patients ... can have serious side effects and even mean the ... crucial that patients insist doctors use plain language ... associate professor of internal medicine at the University of ...
Cached Medicine News:Health News:Children's National researchers make breakthrough in understanding white matter development 2Health News:Children's National researchers make breakthrough in understanding white matter development 3Health News:Cocaine users have 45 percent increased risk of glaucoma 2Health News:Study finds consumers may have more control over health costs than previously thought 2Health News:Study finds consumers may have more control over health costs than previously thought 3Health News:Living with dementia and making decisions 2Health News:Cancer Patients Should Ask Doctors to Use Simple Terms 2
(Date:8/27/2014)... 27, 2014 /CNW/ - Covalon Technologies Ltd. (the "Company" or ... following financial results for its third quarter of fiscal 2014: ... , Revenue of $1,291,378, a 13% decrease over ... loss for the quarter of $240,156 compared to net income ... For the nine months ended June 30, ...
(Date:8/27/2014)... Aug. 27, 2014 IRIDEX Corporation (NASDAQ: ... H. Mackaness is scheduled to make an investor presentation ... 2:55 p.m. Eastern Time on Wednesday, September 3, in New ... the investor presentation will be available in the Investors section ... About IRIDEX IRIDEX Corporation was founded in ...
(Date:8/27/2014)... CITY, Calif. , Aug. 27, 2014  AcelRx ... pharmaceutical company focused on the development and commercialization of ... pain, today announced that senior management will be participating ... presenting at the Morgan Stanley Global Healthcare Conference.  Details ... FBR Healthcare One on One Conference Date: Wednesday September ...
Breaking Medicine Technology:Covalon Announces Third Quarter Results 2Covalon Announces Third Quarter Results 3AcelRx Pharmaceuticals to Participate in Two Upcoming Investor Events 2AcelRx Pharmaceuticals to Participate in Two Upcoming Investor Events 3
Bio-Rad's Genetic Systems HIV-1/HIV-2 PLUS O EIA is a unique assay that detects the broadest range of HIV....
The humidity chamber maintains a moist environment during immunostaining procedures as well as other laboratory procedures requiring controlled incubation steps....
Thermostatically controlled, large capacity surface to quickly evaporate water and solvents from slides and mounting media....
Liquichek Blood Gas Plus CO-Oximeter Control (IL Synthesis Series) is a combination control for use in monitoring the performance of blood gas, ion-selective electrode, biosensor and CO-Oximetry anal...
Medicine Products: