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http://www.physorg.com/news97779197.html
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The researchers developed the agent by attaching a portion of the Bcl-xL protein already known to block cell death - a snippet called BH4 - to the HIV protein TAT, which can deftly carry other molecules into cells. They gave the agent intravenously to mice exposed to 5 Grays of radiation. In humans, this level of exposure would cause a sharp drop in blood cells, leaving individuals with an increased risk of infection and bleeding.
They found the treatment helped protect rapidly dividing T cells and B cells in the spleen - immune system cells that are prone to radiation damage - whether it was given 30 minutes before radiation exposure or 30 minutes afterward.
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[ great news for intense exposure, but I wonder if it effects the long term increased risk of cancer? ]
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