Scientists at Johns Hopkins Medicine have uncovered an unexpected link between the nervous system and bone cancer growth. Their new study suggests that the nerves which carry pain signals might also be helping osteosarcoma tumours grow and spread.
Osteosarcoma is the most common bone cancer in young people. It usually affects the long bones of the legs or arms, and while surgery and chemotherapy can be effective for some, there has been little progress in treatment for decades. For those whose cancer has spread to the lungs, survival rates remain low. This makes every new insight into how the disease works extremely valuable.
What the study found
The researchers looked at how sensory nerves interact with tumours. These nerves normally carry signals such as pain or temperature to the brain, but in this study, they were found growing into osteosarcoma tumours in mice. Once there, they appeared to help the tumour develop new blood vessels and grow faster.
The team focused on a pathway called NGF–TrkA, which allows nerves and blood vessels to grow. When this pathway was blocked, the tumours in mice grew more slowly and survival improved.
Even more interestingly, the researchers tried two drugs that already exist for other conditions: bupivacaine, used for nerve pain and local anaesthesia, and rimegepant, a migraine medication. In the mice, both drugs reduced nerve and blood vessel growth in the tumour and slowed its progression.
When scientists examined human osteosarcoma tissue, they also found signs of this same nerve-related activity, suggesting that similar processes could be happening in people.
Why this matters
This discovery gives researchers a new way of thinking about osteosarcoma. For years, most studies have focused on the tumour cells themselves. This research highlights the tumour environment, the network of nerves, blood vessels, and surrounding tissue that may help the cancer survive.
If nerves are involved in tumour growth, then blocking those nerve signals could become a new type of treatment. It might also help explain why pain and tumour activity sometimes seem connected in osteosarcoma.
Because the drugs tested are already approved for other conditions, there’s a chance that future research could move more quickly toward clinical testing in humans. However, this study was done in mice, so much more work is needed before these approaches can be used safely in patients.
What happens next
The Johns Hopkins team plans to continue studying how nerves and tumours interact and whether targeting this communication could become part of treatment in the future. They hope to test different nerve-blocking drugs and understand which patients might benefit most.
For patients and families, this research is a reminder that progress often comes from looking at the disease in new ways. By uncovering hidden connections between nerves, blood vessels, and tumour growth, scientists are slowly building the foundations for better therapies.
While this discovery won’t change treatment immediately, it’s another important step toward a future where osteosarcoma is more treatable, less painful, and ultimately curable.
Read the published paper here.