Navigation Links
Concentration, timing and interactions are key when it comes to dietary compounds
Date:7/16/2010

This release is available in Spanish.

Agricultural Research Service (ARS) chemist Thomas Wang, who specializes in cancer prevention research, has reported evidence that for some dietary compounds, length of exposure over time may be key to whether or not ingestion leads to a beneficial, or detrimental, effect.

Scientists do not know exactly why one person develops cancer and another does not. But they do know that certain nutrients might increase or decrease cancer risk. There are "layers" of factors involved in the development of cancer, and Wang is studying the layers involving peoples' diet complexity and gene expression.

Wang works at the ARS Diet, Genomics and Immunology Laboratory, part of the Beltsville (Md.) Human Nutrition Research Center. He published a complementary cell-culture and animal-model study showing that concentrations of resveratrol--a highly bioactive compound found in grapes and other plant foods--actually turned out to be a double-edged sword when it came to mitigating cancer risk.

First, Wang exposed human prostate cancer cells to resveratrol and found that it inhibited the cells' growth. He further tested the cells' gene expression. Then Wang tested the effects of resveratrol on a group of laboratory animals that had sex-hormone-dependent tumor cells.

Half of those animals were fed a daily diet that included 3 to 6 milligrams of purified resveratrol (equal to roughly the amount in five glasses of wine or grape juice). At first, the tumor cells in the resveratrol-fed lab animals grew slower. But as the animals continued to consume resveratrol, there was an increase in blood vessels developing around the tumors of the resveratrol-fed animals, effectively setting up a system of feeding the tumors.

The study, published in the journal Carcinogenesis, showed that the concentration of the plant compound is important, but so is length of exposure, according to the authors.


'/>"/>

Contact: Rosalie Marion Bliss
rosalie.bliss@ars.usda.gov
301-504-4318
United States Department of Agriculture-Research, Education, and Economics
Source:Eurekalert

Related medicine news :

1. North Shore-LIJ Becomes NY's First Health System to Require New Nurses to Get Bachelor's Degree
2. Endoscopic ultrasound evaluation is associated with improved outcomes in pancreatic cancer patients
3. New surgery improves outcomes for severe flat foot deformity
4. Madison Avenue Welcomes Nineteen New Stores In First Half Of 2010
5. TowerStrides Inc. Becomes Oracle PartnerNetwork Gold Level Partner
6. Pet Insurance from Trupanion Becomes Available in Hawaii
7. Reading Comes Easier for Kids When Rovers Around
8. Mercy Ships Releases Abel Dalome Just in Time for Father's Day - A Father's Dream Becomes a Reality
9. FileHold Document Management Software welcomes Click2ScanLtd. as a Value Added Re-sellers in the UK
10. Size matters -- when it comes to DNA
11. Breakthrough In Liposuction Comes To New York's Capital District
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/8/2016)... (PRWEB) , ... December 08, 2016 , ... ... accreditation with distinction by the Undersea and Hyperbaric Medical Society (UHMS), the leading ... advanced care and patient safety. Only a few hospitals and facilities have earned ...
(Date:12/8/2016)... ... 08, 2016 , ... Mirixa Corporation , a leading ... pharmacist-delivered patient care services, has announced the promotions of Karen Litsinger to senior ... of sales. , Litsinger joined Mirixa in 2008 after serving as a ...
(Date:12/8/2016)... ... December 08, 2016 , ... SunView ... customers and employees that are both engaging and easy to use. Coming off ... the software company revealed today its plans to roll out new AI-powered self-service ...
(Date:12/8/2016)... , ... December 08, 2016 , ... California Senate Bill ... payments per workers’ compensation claim in 2013 and 2014, according to CompScope™ Medical ... Institute (WCRI) . , According to the study, medical payments per claim in California ...
(Date:12/8/2016)... ... December 08, 2016 , ... The Dianne Michael Insurance ... in Hamilton County, is embarking on a charity drive with the aim of ... homes for orphaned or neglected senior dogs in the Cincinnati region, and LuvFurMutts ...
Breaking Medicine News(10 mins):
(Date:12/9/2016)... Dec. 9, 2016  Forge Therapeutics, Inc. today ... Stock Exchange: EVT, TecDAX, ISIN: DE0005664809) to advance ... the treatment of bacterial infections including those caused ... as an attractive antibacterial target for more than ... suitable chemical starting points has hampered its progress. ...
(Date:12/8/2016)... , Dec. 8, 2016 Australia Ophthalmic ... new report, "Australia Ophthalmic Lasers Market Outlook to 2022", ... market. The report provides value, in millions of US ... market segements - Excimer Lasers, Femtosecond Lasers and YAG ... distribution shares data for each of these market segements, ...
(Date:12/8/2016)... Dec. 8, 2016 KEY FINDINGS ... Patient warming ... of blood during surgeries, lowering the risks of neurological disorders ... of SSIs. The patient warming systems can be segmented into ... benefits in turn reduce the stay at hospitals thus, lowering ...
Breaking Medicine Technology: