news center

Tame killer

Tame killer

作者:达娘类  时间:2019-03-08 04:10:02  人气:

MEDICAL researchers have tamed a dangerous food-poisoning bug in the hope that it can beat cancer. For some time, scientists have known that the bacterium Salmonella typhimurium can shrink tumours. However, the bug can also cause life-threatening septic shock due to a toxic chemical in its cell wall. Now researchers at Vion Pharmaceuticals in New Haven, Connecticut, have produced a strain of S. typhimurium that lacks the toxin. They estimate that this strain is ten thousand times less toxic than usual. When they gave the strain to mice with melanoma, their tumours shrank to 6 per cent of the size of those in untreated mice (Nature Biotechnology, vol 17,