Creatine strengthened cancer-fighting immune cell activity and reduced tumor growth in a mouse melanoma model.
Creatine is best known as a muscle supplement, but a new study examined whether it can also support immune cells involved in cancer defense. The researchers focused on dendritic cells, a type of immune cell that helps alert the immune system by presenting antigen fragments from viruses, bacteria, and tumors to T cells, which can then mount responses against infected or abnormal cells.
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The work combined cell experiments with an animal tumor model. In mouse dendritic cells, the researchers tested whether the ability to take up creatine affected cell survival, immune signaling, and the activation of T cells. They did this by comparing cells with and without the protein that transports creatine into cells, and by examining how the cells responded to additional creatine. Human dendritic cells grown from blood samples were then used to test whether creatine produced similar immune-enhancing effects. Finally, mice implanted with melanoma cells received creatine injections to determine whether these cellular changes translated into differences in tumor growth and immune activity within tumors.
- Mouse dendritic cells made more of the creatine transporter when they switched into an active immune state, both in cells grown outside the body and in cells taken from tumors.
- Mouse dendritic cells without the creatine transporter were less likely to survive, produced fewer inflammatory signals, showed weaker immune-alert markers, and had lower ATP, the molecule cells use as a direct energy source.
- Creatine-treated dendritic cells survived better, showed stronger immune-alert markers, turned on more inflammatory-response genes, and had higher levels of ATP.
- Human dendritic cells produced stronger inflammatory signals after creatine treatment and were better able to activate T cells designed to recognize a tumor protein.
- In the melanoma model, creatine-treated mice had slower tumor growth, and dendritic cells inside the tumors showed stronger signs of immune activity, especially in a subtype that helps present tumor material to T cells.
The results suggest that creatine may help supply the energy needed for dendritic cell activation. Once inside cells, creatine can be converted into phosphocreatine, a stored form of energy support that helps maintain ATP availability. That extra energy support may help dendritic cells send inflammatory signals, display tumor material more effectively, and activate T cells.
Because the study was only done in cells and mice, it does not show whether creatine would have the same effects in human cancer patients. If confirmed in clinical trials, creatine could become a simple and inexpensive way to support immunotherapy strategies for cancer treatment. In episode #100, Dr. Darren Candow breaks down the optimal creatine protocol for supporting strength, brain health, and longevity.