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Viagra, green tea combination may help kill cancer: study.

FUKUOKA, Jan. 26 Kyodo

Medicine to treat erectile dysfunction such as Viagra and a green tea component may be effective in fighting cancer cells when administered together, according to a study on mice published Friday in the Journal of Clinical Investigation.

Hirofumi Tachibana, a Kyushu University graduate school professor who authored the study, said that the treatment's clinical trials on humans are scheduled to start in the United States later this year. He cautioned the public against trying the remedy at home due to possible side effects.

In 2004, Tachibana unveiled that a type of catechin named EGCG, a green tea component, suppresses cancer cell activities, although some researchers doubt the substance has such potency. He then estimated that a body enzyme, PDE5, may be weakening the effectiveness of EGCG.

Since ED drugs such as Viagra block the actions of PDE5, Tachibana injected such medicines into a mouse suffering a blood cancer simultaneously with EGCG and found that cancer cells did not increase, according to the study published online.

Cancerous cells disappeared when they were injected into a mouse implanted with human breast cancer cells, it said. In-vitro experiments were also done on other types of tumors such as pancreas, stomach and prostate cancers, and the treatment proved to be more effective than existing anticancer treatments.
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Publication:Japan Science Scan
Date:Jan 28, 2013
Words:216
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