A Cell Discovery paper reports that the gut bacterium Eggerthella lenta was associated with metastasis in human samples and disrupted the gut vascular barrier while increasing spread in cell and mouse experiments. MondoSanità reports the same 22 September paper: the organism is linked to damage at the vascular barrier that colorectal cancer cells cross on the way to the liver, and mice colonized with the bacterium showed more vascular damage and a higher liver burden.
The Cell Discovery paper says Eggerthella lenta was associated with metastasis in human samples. In cell and mouse experiments the bacterium disrupted the gut vascular barrier and spread increased. MondoSanità, reporting that paper on 22 September, describes the same organism as damaging the checkpoint cancer cells have to cross to enter the blood, and says mice colonized with it showed more vascular damage and a higher burden in the liver.[1], [2]
An association in human samples is not a demonstration that the bacterium is the reason a given patient's cancer reached the liver. The experimental half, barrier damage and increased spread in mice, is the paper's account of what happened when the bacterium was introduced. MondoSanità's news report follows that account. It does not add a treatment recommendation, and this brief does not invent one.[1], [2]
The paper's title claim, echoed by the Italian report, locates the finding in damage to the gut vascular barrier, the wall cells have to cross, rather than in a faster division rate. That is a different lever from growth rate. Both sources locate the finding there. Patient counts are left out of this account.[1], [2]
