Release date: 2018-04-28
Disorders of the human immune system can trigger a variety of autoimmune diseases such as allergies, type 1 diabetes, and multiple sclerosis, which are currently diagnosed only when symptoms are present. Russian researchers have developed a test that diagnoses such immune system diseases through saliva before symptoms appear.
Saliva is a type of human body fluid that contains the same immune proteins as blood and is easy to collect.
Researchers at the St. Petersburg Polytechnic University in Russia use lasers to illuminate saliva samples. The proteins in the sample disperse the light, and the sensor records the scattered light.
By analyzing the intensity of the scattered light over a period of time, the researchers can determine the size of the substance in the saliva. When the immune system is activated, the proteins bind and the volume becomes larger. The composition of matter in different people's saliva is also different, which is mainly caused by certain diseases in the body. Therefore, this method is expected to be used to determine whether the human body has responded appropriately to the infection and then to diagnose the disease.
Researchers say the method is cheap and effective. Clinical trials have shown that patients can learn about their illness through saliva testing before symptoms appear, thereby increasing the chances of recovery. This method can also be used to test the individual's response to the drug in advance, thus helping people to better use the drug.
Source: Xinhuanet
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