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Watercress compound (called phenylethyl isothiocyanate) may 'turn off' breast cancer signal - EurekaAlert! (article link)

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As tumours develop they rapidly outgrow their existing blood supply so they send out signals which make surrounding normal tissues grow new blood vessels into the tumour which feed them oxygen and nutrients. The research shows that the plant compound (called phenylethyl isothiocyanate) found in watercress can block this process, by interfering with and 'turning off' in the function of a protein called Hypoxia Inducible Factor (HIF).

The research team was able to detect significant levels of the plant compound PEITC in the blood of the participants following the watercress meal, and most importantly, could show that the function of the protein HIF was also measurably affected in the blood cells of the women.

Watercress may 'turn off' breast cancer signal