濃い色の果物や野菜が大腸癌に効果

画像 昔懐かしい桑の実には鉄・マグネシウム・カルシウムなど豊富な栄養素が含まれている。アントシアニンもブルーベリーの3倍含むという。

 果物や野菜の赤青紫といった濃い色の成分が大腸癌などの腸管のガン細胞と戦うというオハイオ大学からの研究報告。ガン細胞の成長が遅くなるのみでなく、20%も死滅させるという。アントシアニンという色素はガン細胞の成長を50-80%遅くさせる。チョークベリーの成分は、正常細胞に害をあたえずにガン細胞の1/5を死滅させる。アントシアニンは腸管から血液へ吸収されにくく、腸管の組織に高濃度にとどまりやすい。

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Last Updated: Monday, 20 August 2007, 13:45 GMT 14:45 UK
Darker fruits could fight cancer
http://news.bbc.co.uk/2/hi/health/6954696.stm

The compounds which give certain fruit and vegetables their dark colour may contain powerful cancer fighting properties, US research suggests.

Studies on rats and human cells found anthocyanins - which colour red, purple and blue fruits - notably slowed the growth of colon cancer cells.

The more exotic the plant the better: purplecorn and bilberry were found to be much more potent than the radish.
The research was presented at a meeting of the American Chemical Society.
In some experiments, the researchers from Ohio State University saw cancer growth not just slowed, but as many as 20% of the cells killed.
For instance, anthocyanin pigments obtained from black carrots and radishes slowed the growth of cancer cells by between 50 to 80%.
But compounds from chokeberries for instance killed up to a fifth of existing cells, without impacting upon healthy ones.

Working it out
The researchers say their findings bring the scientific community closer to understanding what it is that gives fruit and vegetable their much touted cancer-fighting properties.
"These foods contain many compounds, and we're just starting to figure out what they are and which ones provide the most health benefits," said Monica Giusti, the lead author of the study.
She suggested that the results from this particular study suggested that anthocyanin may be of particular use in fighting gastrointestinal cancers.
Very little of the substance is absorbed by the bloodstream, but it may be absorbed in the gastrointestinal tract as it passes through, she said.
However, the researchers stopped short of recommending one particular fruit and vegetable over another, stressing that more research was needed into how these compounds worked.
Henry Scowcroft, senior information officer at Cancer Research UK, said: "Although at an early stage, this research helps us understand exactly how the substances in fruit and veg protect us from bowel cancer.
"Isolating these substances - and tweaking them so that they're even more potent - could allow scientists to develop new drugs to treat the disease.
"In the future, it could lead to the development of drugs that help prevent bowel cancer in people at high risk."

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アントシアニン
出典: フリー百科事典『ウィキペディア(Wikipedia)』

アントシアニン (anthocyanin) は抗酸化物質として知られるポリフェノールの一種で、アントシアニジン (anthocyanidin) をアグリコンとする配糖体のこと。植物界において広く存在するアントシアン(anthocyan, 果実や花の赤、青、紫を示す水溶性色素の総称)の一種で、高等植物では普遍的な物質であり、花や果実の色の表現に役立っている。

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