What is NK cell?
NK cell is a type of white blood cell which is on the front line against microorganisms or mutated cells which may develop to be cancer cells. Namely, weak NK cells mean susceptibility to infection and inability to prevent first-stage cancer cells. Testing for natural killer cell activity is a test of the immune functions against microorganisms and cancer cells.
How significance is the testing for natural killer cell activity?
The test is optional depending on your opinion. If you prioritize immune functions against infection and cancer cells, testing for natural killer cell activity is another important test.
Two types of testing for natural killer cell activity
- Test of blood cell activity against foreign objects (NK Cell Activity): NK cell activity test requires a blood sample. NK cells in the blood are separated and cultured with cancer cells in a laboratory. Then, NK cell activity against cancer cells is considered based on the number of eliminated cancer cells compared with the activity of standard cells.
- Immunity Test The test checks the quantity of substances released from NK cells which reflects the response of NK cells and status of the immune system:
- NK cell activity over 500 is considered strong immunity.
- NK cell activity lower than 500 is divided into: weak but acceptable immunity, deficient immunity and severe immunodeficiency.
For the best assessment of NK cell activity, the test-taker should undergo both tests, as each test has different procedures and provides different information in terms of quality and quantity. Both test results are required to assess the risk of cancer and other diseases. NK cell activity test indicates how well your body can defend itself against microorganisms and cancer cells.