Navigation Links
Blackberries, Broccoli Sprouts Battle Cancer
Date:12/6/2007

Raw vegetables like broccoli also keep some malignancies at bay, research shows

THURSDAY, Dec. 6 (HealthDay News) -- Your local farmer's market might hold the key to cancer prevention, since new research shows that black raspberries, broccoli sprouts and some raw vegetables reduce the risk of esophageal and bladder cancers.

Data from three studies on the subject was presented Thursday at the American Association for Cancer Research's Sixth Annual International Conference on Frontiers in Cancer Prevention, in Philadelphia.

Fruits and vegetables have long been known to help reduce the risk of certain cancers. Based on prior research, the American Cancer Society recommends eating five servings of fruits and vegetables daily.

In the first study, Ohio State University researchers found black raspberries may protect against esophageal cancer by reducing the oxidative stress that results from Barrett's esophagus, a precancerous condition usually caused by gastroesophageal reflux disease. The esophagus is a long tube that connects the throat to the stomach. Reflux disease causes stomach acid to continually splash back up into the esophagus.

"Specifically in the case of Barrett's patients, reflux of the stomach and bile acid contribute to ongoing oxidative damage. Thus, our hypothesis is that feeding a food that is high in potential protective constituents, such as antioxidants, vitamins, minerals and other phytochemicals, may help restore the oxidative balance," lead researcher Laura Kresty said.

People with Barrett's esophagus typically are 30 to 40 times more likely to develop esophageal cancer, which has a poor five-year survival rate of 15 percent.

The team gave 32 grams to 45 grams of black raspberries daily for six months to 20 patients with Barrett's esophagus. They analyzed changes in blood, urine and tissue before, during and after the treatment, and found lower levels of some of the chemical markers of oxidative stress in both urine and tissue samples.

Black raspberries previously have been shown to reduce the risk of oral, esophageal and colon cancer in animal models, according to the researchers, who called for further study in humans.

Dietitian Wendy Demark-Wahnefried, a professor of behavioral science at M.D. Anderson Cancer Center at the University of Texas in Houston, said she would feel comfortable advising people with Barrett's to eat black raspberries. "It couldn't hurt," she said, but added that further studies need to find out if the berries really do prevent cancer.

In other research presented at the meeting, broccoli sprouts and cruciferous vegetables both showed promise in the fight against bladder cancer, according to two separate teams from the Roswell Park Cancer Institute in Buffalo, N.Y.

Using a rat model, a team lead by Dr. Yuesheng Zhang, a professor of oncology, demonstrated that a broccoli sprout extract reduced bladder cancer in rats by 70 percent.

"Our present study shows that broccoli sprout extracts fed to rats in the diet inhibits bladder cancer development induced by a carcinogen. We don't yet know if the extracts inhibit the growth of a existing bladder cancer," said Zhang, who explained that broccoli sprouts are a rich source of a well-known cancer preventive agent known as sulforaphane.

"We next plan to find out if broccoli sprout extracts can fight bladder cancer in humans," Zhang noted.

A second team at the institute found that people who ate three or more servings of raw, cruciferous vegetables per month reduced their risk of bladder cancer by 40 percent. Cruciferous vegetables include broccoli, cabbage and cauliflower.

The team analyzed the dietary habits of 275 people with early bladder cancer and 825 people who were cancer-free. The researchers specifically asked how many servings of raw or cooked cruciferous vegetables they ate before their diagnosis and whether they smoked.

Analysis of the data showed that the more raw, cruciferous vegetables people ate, the lower their risk of bladder cancer. In comparison to people who smoked and ate fewer than three servings of raw vegetables a day, nonsmokers eating at least three servings of cruciferous vegetables daily were 73 percent less likely to develop bladder cancer.

"In our study, we do find intake of raw cruciferous vegetables showed risk reduction of bladder cancer in smokers, and even the heavier smokers," said lead researcher Li Tang.

The researchers stressed that the benefits are derived from raw cruciferous vegetables, giving cole slaw the edge over cabbage soup when it comes to cancer prevention.

"This confirms that there are a variety of compounds within fruits and vegetables that contribute to reducing the risk of cancer. Research like these studies contribute to our knowledge about what the impact of specific nutrients may be on specific types of cancer," said Colleen Doyle, director of nutrition and physical activity for the American Cancer Society. "Cooking leaches out some nutrients but makes others more absorbable. Until we know more in this regard, the bottom-line message for consumers is eat at least five servings of fruits and vegetables each day, raw and/or lightly cooked. Focus on those with the most color, since, in general, fruit and vegetables with the most color have the most cancer-fighting antioxidants and phytochemicals."

"Surveys we've done indicate many people don't think they have control over their cancer risk, but studies clearly indicate they do. For the majority of people who don't smoke, watching their weight, being more active and eating a healthy diet are the most important ways to reduce cancer risk," Doyle said.

More information

To learn how diet and physical activity can help prevent cancer, visit the American Cancer Society.



Madeline Vann



SOURCES: Yuesheng Zhang, M.D., Ph.D., professor, oncology, Roswell Park Cancer Institute, Buffalo, N.Y.; Laura Kresty, Ph.D., assistant professor, Ohio State University, Columbus, Ohio; Wendy Demark-Wahnefried Ph.D., R.D., professor, behavioral science, M.D. Anderson Cancer Center, University of Texas, Houston; Colleen Doyle, M.S., R.D., director, nutrition and physical activity, American Cancer Society; Dec. 6, 2007, presentations, American Association for Cancer Research's Sixth Annual International Conference on Frontiers in Cancer Prevention, Philadelphia


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Broccoli sprout-derived extract protects against ultraviolet radiation
2. Broccoli May Help Fight Skin Cancer
3. Battle Continues Over Vietnam PTSD Numbers
4. Life-Saving News for Battlefield Soldiers & Wounded Civilians
5. The Fight for His Life: Author, Family Battle Disease and Challenge Politics in the Face of Survival
6. National Battle of the Hospital Chefs Cooks Up a Winner
7. Parents can Help Young Superheroes Battle Cavities on Halloween Night
8. Early predictive model may be new weapon against leading cause of death on battlefield
9. Eyeglasses Upgrade Helps Elderly Battle Depression
10. Combining Medications Often Best Strategy to Battle Rheumatoid Arthritis
11. World class technology and talent battle cancer at the Centenary Institute
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Blackberries, Broccoli Sprouts Battle Cancer
(Date:3/29/2017)... ... March 29, 2017 , ... The Wharton School of ... Julie Taffet Moelis, W’81, have made a $10 million gift to establish the ... that will provide a pathway to a Wharton MBA for highly-qualified Penn undergraduates whose ...
(Date:3/29/2017)... ... March 29, 2017 , ... VisualSP has helped over 1.5 ... the only option for on-premises installation of its Help System for SharePoint was at ... the system into the entire tenant. , The company recently released a modified ...
(Date:3/28/2017)... ... March 28, 2017 , ... Tuesday, March 28, 2017, ... public to take the Diabetes Risk Test to find out if they are at ... World Airports will light up the evening sky by programming the LAX pylons the ...
(Date:3/28/2017)... NEW YORK, NEW YORK (PRWEB) , ... March ... ... their breakthrough development, NTX Technology™, is the first technology to directly address the ... World Health Organization. NTX Technology™ is a patented compound of FDA and TTB ...
(Date:3/28/2017)... ... 2017 , ... Resoundant, Inc., the developer of Magnetic ... annual customer education symposium, a world-class learning conference that offers educational content designed ... 31, 2017 at the Atlanta Marriott Marquis in Atlanta, Georgia. , Innovations for ...
Breaking Medicine News(10 mins):
(Date:3/28/2017)... , March 28, 2017 /PRNewswire/ - StarFish Medical, ... development firm, announced today that it has merged with ... medical device industrial design and productization organization.  The resulting ... North America with easier east coast ... the design, engineering, regulatory, and manufacturing process. ...
(Date:3/28/2017)... BOSTON , March 28, 2017 /PRNewswire/ ... today announced a partnership with premium news ... allows pharmaceutical companies to extract key insights from ... text mining technology. The Linguamatics I2E ... top 20 global pharmaceutical companies. The Linguamatics-Dow Jones ...
(Date:3/28/2017)... , March 28, 2017 Emosis SAS, ... new business entity, Emosis Ltd, headquartered in Tel Aviv ... novel assays complementing the mother company existing technology platform and test ... sales development of Emosis kits. ... This strategic move starts building Emosis international footprint. Emosis ...
Breaking Medicine Technology: