Scientists then studied how injections of TGF-beta in lab rats accelerated fibrotic scarring at a wound site.

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There are few places in the world where humans feel more like lab rats than at the airport.

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Life itself is the most telling social science experiment of them all and we are its most thoroughly tested lab rats.

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The rebuilding started with injecting new heart cells, in this case cells from baby lab rats, and pumping them through the heart.

CNN: New hope may lie in lab-created heart

"Linear" here means that if a certain dose kills 5% of the lab rats (or people) exposed, then a hundredth of that dose will kill 0.05%.

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The grafted skin could tear, and infection is possible from the trace amounts of murine cells, which come from lab rats or mice, used to aid skin growth.

CNN: STORY HIGHLIGHTS

Lab rats respond by seeking pleasure, including eating high-energy food.

NPR: Dishing Up Comfort Food for Hard Times

They're treating us like lab rats.

BBC: Stem cell trial halted

Stanford's Dr. Pasricha and colleagues examined this question in the lab by irritating the stomachs of newborn rats.

WSJ: A Gut Check for Many Ailments

The collaboration worked not only when both rats were in the same lab, but also when one was at Duke and the other in Brazil.

CNN: Do telepathic rats advent biologic computers?

Duke University isn't deterred by our behavior -- if anything, it just took oversharing literally by connecting two rats' minds in an experiment, first in a lab and ultimately online.

ENGADGET

The lab, which counts Pfizer, GlaxoSmithKline and Merck among its clients, uses mice, rats and guinea pigs to test compounds before beginning human trials.

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