New drug to help bones heal better, faster: New study

Researchers develop new type of drug that may help bones heal faster and better by causing stem cells to divide and turn into more bone cells.

Researchers are developing a new type of drug that may help bones heal faster and better by causing stem cells to divide and turn into more bone cells.

Using bone samples from people undergoing hip replacement surgery, the researchers were able to show that the drug - a protein that activates a molecular pathway called the 'Wnt' pathway -

causes stem cells found within bones to divide and to turn into more bone cells. The Wnt pathway is found throughout the animal kingdom - from sponges to humans - and it plays a fundamental

role in animal development and disease.

It is involved in controlling the growth of stem cells, which are 'master cells' that help restore tissues after injury. One example of this is in amphibians like salamanders. If these

animals lose a leg, they can just regrow a new one, researchers said.

"Bone fractures are a big problem in society, especially in older people. It is getting worse as more people get older and their risk of fracture increases," said Dr Nick Evans, Associate

Professor in Bioengineering at the University of Southampton and lead author of the study. "Most fractures heal completely by themselves, but a surprising number, around 10 per cent, take

over six months to heal, or never heal at all. In the worst cases this can lead to several surgical operations, or even amputation," said Evans.

"Through our research, we are trying to find ways to chemically stimulate Wnt signalling using drugs. To achieve this, we selectively deliver proteins and other molecules that change Wnt

signalling specifically to stem cells, particularly in the bone," he said. "This may help us find cures for many diseases, including bone disease, and speed up bone healing after fracture,"

said Evans.

However the researchers found that if the Wnt pathway was switched on too long, the regenerative effect was lost or, even reversed. The research was published in the journal Stem Cells.

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