Seeing Is Believing.
For many people, only physical and concrete evidence is convincing. In essence, they need to see the actual event to fully believe it. With the advancement of scanning electron microscopes, we now have the ability to actually witness immune cells attacking cancer cells.
Below are two videos of natural killer cells attacking and destroying cancer cells.
In the first video, at the top of the picture is a cancer cell (larger cell) and below it is a natural killer cell. The natural killer cell kills the cancer cell on contact. It binds to its target and then delivers a lethal burst of chemicals that produce holes in the target cells membrane. In the video you will see the cancer cell collapsing.
The second video is a time-lapse video of activated natural killer cells added to a culture of Ewing sarcoma cells. Ewing sarcoma is a rare bone cancer that attacks primarily in childhood or early adulthood. The flat, green cells are Ewing sarcoma, and the white, round, more active cells with red granules are the natural killer cells
Credit: David Shook, St. Jude Children’s Research Hospital; smcsetta.