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Dr. Carolyn Henry, a veterinary oncologist at the University of Missouri veterinary school, says that, unlike lab mice, dogs get cancer naturally, just like humans. So their cancers are more likely to behave like human cancer when treated. "It's the same disease, it really doesn't matter what the species is," Henry says. "It's the same disease if it occurs naturally. And so, answers in one species should translate to answers in other species in many cases."

Through this method, the researchers were able to identify that the frizzled-6 gene was expressed around eight times more in tumor-forming cell lines. The specific cascade initiated by frizzled-6 and how it affects the development of cancerous cells has yet to be determined. The overexpression of frizzled-6 suggests that the protein either forms tumor cells directly or is an indirect result of other mutated pathways.

So how do animals play a role in this research? Well, in a couple of ways. First, the chlorotoxin in Tumor Paint was derived from scorpion venom. Second, researchers worked with dogs before moving into human trials to determine the likelihood of success. After promising results in canines, human trials are now underway at Cedars Sinai Medical Center! Right now, the study is aimed at proving that Tumor Paint is able to reach the brain tumor successfully. If all goes well, it's possible that this could lead to more successful surgical outcomes.