Navigation Links
Extract of broccoli sprouts may protect against bladder cancer
Date:2/27/2008

PHILADELPHIA A concentrated extract of freeze dried broccoli sprouts cut development of bladder tumors in an animal model by more than half, according to a report in the March 1 issue of Cancer Research, a journal of the American Association for Cancer Research.

This finding reinforces human epidemiologic studies that have suggested that eating cruciferous vegetables like broccoli is associated with reduced risk for bladder cancer, according to the studys senior investigator, Yuesheng Zhang, MD, PhD, professor of oncology at Roswell Park Cancer Institute. Although this is an animal study, it provides potent evidence that eating vegetables is beneficial in bladder cancer prevention, he said.

There is strong evidence that the protective action of cruciferous vegetables derives at least in part from isothyiocyanates (ITCs), a group of phytochemicals with well-known cancer preventive activities.The bladder is particularly responsive to this group of natural chemicals, Zhang said. In our experiments, the broccoli sprout ITCs after oral administration were selectively delivered to the bladder tissues through urinary excretion.

Other cruciferous vegetables with ITCs include mature broccoli, cabbage, kale, collard greens and others. Broccoli sprouts have approximately 30 times more ITCs than mature broccoli, and the sprout extract used by the researchers contains approximately 600 times as much.

Although animals that had the most protection against development of bladder cancer were given high doses of the extract, Zhang said humans at increased risk for this cancer likely do not need to eat huge amounts of broccoli sprouts in order to derive protective benefits.

Epidemiologic studies have shown that dietary ITCs and cruciferous vegetable intake are inversely associated with bladder cancer risk in humans. It is possible that ITC doses much lower than those given to the rats in this study may be adequate for bladder cancer prevention, he said.

Zhang and his colleagues tested the ability of the concentrate to prevent bladder tumors in five groups of rats. The first group acted as a control, while the second group was given only the broccoli extract to test for safety. The remaining three groups were given a chemical, N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN) in drinking water, which induces bladder cancer. Two of these groups were given the broccoli extract in diet, beginning two weeks before the carcinogenic chemical was delivered.

In the control group and the group given only the extract, no tumors developed, and there was no toxicity from the extract in the rats.

About 96 percent of animals given only BBN developed an average of almost two tumors each of varying sizes. By comparison, about 74 percent of animals given a low dose of the extract developed cancer, and the number of tumors per rat was 1.39. The group given the high dose of extract had even fewer tumors. About 38 percent of this high-dose group developed cancer, and the average number of tumors per animal was only .46 and, unlike the other animals, the majority were very small in size.


'/>"/>

Contact: Jeremy Moore
Jeremy.moore@aacr.org
267-646-0557
American Association for Cancer Research
Source:Eurekalert

Related biology news :

1. Bilberry extract -- can it help prevent certain cancers?
2. Videos extract mechanical properties of liquid-gel interfaces
3. A compound extracted from olives inhibits cancer cells growth and prevents their appearance
4. Natural chemical found in broccoli helps combat skin blistering disease
5. Natural compound in broccoli could treat devastating genetic skin disorder
6. Eat up all of your Brussels sprouts -- unless youre an aphid
7. Rain forest protection works in Peru
8. Same gene protects from 1 disease, opens door to another
9. Conservation International and Toyota partner to protect Philippines rain forests
10. Fungus genome yielding answers to protect grains, people and animals
11. Genes that both extend life and protect against cancer identified
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/22/2016)... , June 22, 2016   Acuant ... and verification solutions, has partnered with RightCrowd ... solutions for Visitor Management, Self-Service Kiosks and ... products that add functional enhancements to existing ... corporations and venues with an automated ID ...
(Date:6/16/2016)... 16, 2016 The global ... to reach USD 1.83 billion by 2024, according ... Inc. Technological proliferation and increasing demand in commercial ... to drive the market growth.      ... The development of advanced multimodal techniques for biometric ...
(Date:6/7/2016)...  Syngrafii Inc. and San Antonio Credit Union ... integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution into ... result in greater convenience for SACU members and ... existing document workflow and compliance requirements. ... Highlights: ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only ... Center and will showcase its product’s latest features from June 26 to June ... scientific poster on Disrupting Clinical Trials in The Cloud during the conference. ...
(Date:6/23/2016)... Windsor, Connecticut (PRWEB) , ... June 23, 2016 ... ... will introduce a new line of intelligent tools designed, tuned and optimized exclusively ... place September 12–17 in Chicago. The result of a collaboration among several companies ...
(Date:6/23/2016)... 23, 2016 ReportsnReports.com adds ... to its pharmaceuticals section with historic and forecast ... much more. Complete report on the ... profiling 15 companies and supported with 261 tables ... . The Global Cell Culture ...
(Date:6/22/2016)... -- Research and Markets has announced the addition of ... offering. The global biomarkers ... in 2013. The market is expected to grow at a five-year ... increasing from $50.6 billion in 2015 to $96.6 billion in 2020. ... period (2015 to 2020) are discussed. As well, new products approved ...
Breaking Biology Technology: