Screening spots cancer ‘fingerprint’ in dogs

A dog undergoes a health checkup at the Virginia-Maryland College of Veterinary Medicine. (Credit: Andrew Mann/ Virginia Tech)

A new, noninvasive, rapid test that uses a dog’s urine allows for the potential early detection of cancer.

Cancer is common in dogs, with some breeds being more prone to certain variations of the disease than others. Recent studies have shown that nearly half of dogs over the age of 10 will develop cancer, making early screening a crucial precaution for dog owners of any breed.

Currently, there are three genomic blood tests that can test for tumor or cancer proteins, but no noninvasive rapid tests using urine currently exist.

The new study appears in the journal Frontiers in Veterinary Science.

The researchers considered a broad spectrum of cancer types and decided to focus on the most common types present in dogs, such as lymphoma. Using a new application of Raman spectroscopy, the researchers sampled urine and found through the display of molecules that cancerous subjects had a unique “fingerprint” that could be used to indicate the presence of cancer.

“If a new patient comes into the clinic and provides a urine sample, we can compare it against our database of urine scans to determine if the sample more closely matches a cancer fingerprint or a healthy fingerprint,” says Ryan Senger, associate professor in the biological systems engineering department at Virginia Tech. “With the research that we have done so far, we were more than 90% accurate at being able to tell if a new sample had cancer fingerprint or a healthy fingerprint.”

These results are significant for several reasons. Blood tests are often only about 60% accurate, are expensive, and are performed in a lab.

Instead of having to wait for the results of a blood test, this cost-effective screening provides a preliminary understanding into whether a dog has the markers of cancer in a matter of minutes. As a noninvasive screening, it also has the potential to be done at home.

“Owners could go from paying for expensive testing every few months, to having a urine screening done once every few months, depending on the dog’s risk for cancer, if they wanted to,” says Nikolaos Dervisis, associate professor of oncology at Virginia-Maryland College of Veterinary Medicine. “This screening would allow veterinarians to decide if further comprehensive testing is needed based on the results.”

As the research progresses, the team hopes to be able to not only detect cancer in dogs, but assess a dog’s response to therapy and evaluate the recurrence of tumors and cancer. Additionally, the researchers hope to use the screening tool in other animals. There is even potential future use in human health studies.

“We could potentially measure responses to medicine and chemotherapy in dogs already undergoing treatment, then monitor those dogs to see how they’re doing,” says John Robertson, research professor in the biological systems engineering department at Virginia Tech.

“Can we differentiate the kind of diseases we screen for? Which patients are responding to drugs and why? We’re currently working to collaborate with other institutions to further explore how all these factors can be beneficial.”

Source: Chelsea Seeber for Virginia Tech