Last Updated on June 2, 2026 by Staff
These immune cells are really good at destroying cells around them. They do this by exploding fast like a bomb. This process happens so quickly that the cell is gone in just a few minutes.
The scientists found these cells in planarian flatworms. These flatworms are special because they can regrow their body if it gets cut into pieces. The scientists think that studying these flatworms can help us learn more about how our immune system works and how we can use that knowledge to make medicines.
The scientists named these immune cells “ruptoblasts” because they explode when they are triggered by a special hormone. This hormone is called activin. Normally, activin helps the flatworms regrow and have babies. When there is too much activity it makes the ruptoblasts explode and kill the bad cells.
Hormone Trigger
The scientists found out about ruptoblasts when they were doing experiments with flatworms. They took parts of flatworms and put them together. The flatworms did not like the parts and tried to get rid of them. Instead of using their normal immune system they used the ruptoblasts to explode and kill the bad cells.
The scientists think that the activin hormone is what triggers the ruptoblasts to explode. They tested this by putting activin into flatworms and watching what happened. Enough the ruptoblasts exploded and killed the bad cells.
Cell Explosion
The scientists used tools to watch the ruptoblasts up close. They saw that the ruptoblasts were cells that responded to the activin hormone. When the activin triggered the ruptoblasts they suddenly burst open. Released bad things that killed the cells around them. This whole process happened in a few minutes.
The scientists named this process “ruptosis”. It is a kind of cell death that is different from what happens in other animals. Other animals can also have cell death but it happens much more slowly. The ruptoblasts are special because they can kill cells really quickly.
Defense
The scientists wanted to see how strong the ruptoblasts were. They tested them against bacteria like E. Coli and against human cells. The ruptoblasts were able to kill all of these cells really quickly.
The scientists were surprised that the ruptoblasts were so good at killing cells without hurting the good cells around them. This is important because when our immune system gets out of control it can hurt our bodies. The ruptoblasts are able to kill cells without causing any more damage.
The ruptoblasts are different from our immune cells. They are not made from the kinds of cells that our immune system uses. Instead they are made from glandular cells that can store bad things inside them. When they are triggered they release these things and kill the cells around them.
Evolutionary Clues
The scientists think that the ruptoblasts may be an immune system that has been around for a long time. They have only found ruptoblasts in flatworms and a few other ancient animals. This suggests that these animals may have had this system for millions of years.
The scientists think that humans may have lost this system because our bodies are not as good at regrowing damaged tissue. The flatworms can regrow their body if it gets hurt so they can afford to have an immune system that is really aggressive. Humans are not as good at regrowing tissue so we need a system that is more careful.
Medical Potential
The scientists think that studying the ruptoblasts could help us make medicines. Because the ruptoblasts can kill cells without hurting good cells they may be able to help us make targeted therapies. These therapies could kill cells like bacteria or cancer cells without hurting the rest of the body.
The scientists are excited about the possibility of using the ruptoblasts to make medicines. They think that this could be a way to treat infections or cancer without causing too much damage to the body. They are going to keep studying the ruptoblasts to see if they can learn more about how they work and how we can use them to make medicines.
The scientists also think that studying animals like flatworms can help us learn more about biology and make new discoveries. The flatworms may seem simple. They have some really cool abilities that we can learn from. By studying them we may be able to make medicines or discover new things about how our bodies work.