Natural killer (NK) cells are a type of white blood cell that play a key role in the immune system. They are part of the body's first line of defense against infections and cancer. NK cells are unique because they can recognize and kill cells that are infected or cancerous without needing prior exposure to them.
NK cells are crucial for maintaining health because they help protect the body from diseases. They can identify and destroy abnormal cells, which is especially important in preventing cancer. When functioning properly, NK cells can help control the spread of tumors and reduce the risk of cancer development.
In the body, NK cells perform their function by releasing substances that can kill target cells. They can detect changes in the surface of infected or cancerous cells and respond quickly. This rapid response is vital for limiting infections and ensuring that cancer cells do not proliferate.
Overall, NK cells are essential for a healthy immune response. Understanding their role can help researchers develop new therapies for cancer and other diseases where the immune system is involved.