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A simple procedure indicates whether the patient has cancerous cells in the body, but does not answer the question of where and how serious is his condition. A team of scientists from the University of Queensland has developed a universal cancer test that can detect traces of disease in the patient's blood. To detect the presence of malignant cells anywhere in the body, a color-changing liquid is used. The results are available in less than 10 minutes.
The test is still in the development stage, but it is a radical new approach to cancer detection that would allow the doctor to perform simple and systematic screening for the disease. The test has a sensitivity of about 90%, which means that it would reveal about 90 out of every 100 cancer cases.
Scientists have argued that normal and cancer DNA are very different in water. The DNA to be examined is added to water containing tiny gold nanoparticles that convert water into pink. When DNA from cancer cells is added, it binds to the nanoparticles so that the water retains its original color. However, when DNA from healthy cells is added, it binds differently to the particles and the water becomes blue.
"The test is sensitive enough to detect very low levels of cancer DNA in the sample," said Laura Carrascosa, a researcher at the University of Queensland. Scientists tested 200 human samples of healthy and cancerous DNA. They are currently working on clinical trials with patients with a wider range of cancer types than the one tested to date.
Doctors must now perform a tissue biopsy in a patient with an alleged tumor, an invasive procedure. A less invasive test for early detection of cancer could change the way patients are examined. Although a universal cancer test is not accurate enough to determine the location or size of the tumor, it will give the doctor a quick answer to the question of whether a patient is suffering from cancer. cancer.
source: theguardian.com.
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