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Home Science & Environment Medical Research

Mapping gene activity in mechanically stressed bones reveals potential treatment pathways

January 27, 2025
in Medical Research
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Certain genes are active in areas of bone experiencing mechanical stress, may offer treatment targets
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Certain genes are active in areas of bone experiencing mechanical stress, may offer treatment targets
Overview of our spatial transcriptomics–based mechanomics platform to investigate the mechanobiology of fracture healing. Credit: Science Advances (2025). DOI: 10.1126/sciadv.adp8496

Bone does not just grow in any which way—rather, the bone cells respond to external forces. If bones are subjected to targeted mechanical loading as they heal following a fracture, they can potentially become larger, denser and more stable than they were before the fracture occurred.

This effect was demonstrated in mice three years ago by researchers led by Ralph Müller, a Professor at the Department of Health Sciences and Technology. In that work, the scientists used special plates to fix bone fractures in place, allowing the two parts of the healing bone to be pressed against each other cyclically for a few minutes several times a week in a form of vibration therapy.

However, the mechanisms by which mechanical stimuli influence bone have remained elusive. “Only if we understand these mechanisms can we use them as the basis for developing new therapies,” says Neashan Mathavan, a researcher in Müller’s group and lead author of a new study published in Science Advances.

Mathavan is talking not only about the healing of bone fractures but also about how fractures can be prevented, particularly in older people. In old age, bone density decreases and bones become more vulnerable to fractures. “Ideally, we need new therapeutic approaches to delaying the breakdown of bone in old age.”

Gene activity deciphered point by point

Mathavan, Müller and their colleagues have now carried out a highly detailed investigation of which genes are active in a healing bone. This work was once again carried out in mice with a broken thigh bone, whose healing was supported with vibration therapy. The researchers determined—to a high level of spatial resolution—which genes are active at each point in the bone, and which are not.

They then combined this three-dimensional atlas of gene activity with information on forces acting at the respective locations, which they calculated using computer simulations. “For each point in the bone, we now know what mechanical conditions exist there, where bone is being formed and where bone is being broken down,” explains Müller.

This approach allowed the researchers to show that certain genes are active specifically in the areas of bone that experience strong mechanical stress. These genes include some that contribute to the formation of the collagenous matrix of bone and some that promote bone mineralization. Conversely, genes that inhibit bone formation are not active at those locations, but rather in areas that do not experience mechanical stress.

The scientists now plan to use their findings to propose new therapeutic approaches that allow fractures to heal better and bones to remain strong even in old age. In their research in mice, they will now put a special focus on the topic of bone aging.

It may be possible to use drugs in a targeted manner to activate or inhibit the desired genes, but Müller believes vibration therapy or a combination of the two is equally conceivable. “We will see which direction it takes,” says the researcher, although he expects vibration therapy to offer certain advantages. “It’s likely that vibration therapy will involve fewer side effects than treatment using drugs.”

More information:
Neashan Mathavan et al, Spatial transcriptomics in bone mechanomics: Exploring the mechanoregulation of fracture healing in the era of spatial omics, Science Advances (2025). DOI: 10.1126/sciadv.adp8496

Citation:
Mapping gene activity in mechanically stressed bones reveals potential treatment pathways (2025, January 27)
retrieved 27 January 2025
from https://medicalxpress.com/news/2025-01-gene-mechanically-stressed-bones-reveals.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.




Certain genes are active in areas of bone experiencing mechanical stress, may offer treatment targets
Overview of our spatial transcriptomics–based mechanomics platform to investigate the mechanobiology of fracture healing. Credit: Science Advances (2025). DOI: 10.1126/sciadv.adp8496

Bone does not just grow in any which way—rather, the bone cells respond to external forces. If bones are subjected to targeted mechanical loading as they heal following a fracture, they can potentially become larger, denser and more stable than they were before the fracture occurred.

This effect was demonstrated in mice three years ago by researchers led by Ralph Müller, a Professor at the Department of Health Sciences and Technology. In that work, the scientists used special plates to fix bone fractures in place, allowing the two parts of the healing bone to be pressed against each other cyclically for a few minutes several times a week in a form of vibration therapy.

However, the mechanisms by which mechanical stimuli influence bone have remained elusive. “Only if we understand these mechanisms can we use them as the basis for developing new therapies,” says Neashan Mathavan, a researcher in Müller’s group and lead author of a new study published in Science Advances.

Mathavan is talking not only about the healing of bone fractures but also about how fractures can be prevented, particularly in older people. In old age, bone density decreases and bones become more vulnerable to fractures. “Ideally, we need new therapeutic approaches to delaying the breakdown of bone in old age.”

Gene activity deciphered point by point

Mathavan, Müller and their colleagues have now carried out a highly detailed investigation of which genes are active in a healing bone. This work was once again carried out in mice with a broken thigh bone, whose healing was supported with vibration therapy. The researchers determined—to a high level of spatial resolution—which genes are active at each point in the bone, and which are not.

They then combined this three-dimensional atlas of gene activity with information on forces acting at the respective locations, which they calculated using computer simulations. “For each point in the bone, we now know what mechanical conditions exist there, where bone is being formed and where bone is being broken down,” explains Müller.

This approach allowed the researchers to show that certain genes are active specifically in the areas of bone that experience strong mechanical stress. These genes include some that contribute to the formation of the collagenous matrix of bone and some that promote bone mineralization. Conversely, genes that inhibit bone formation are not active at those locations, but rather in areas that do not experience mechanical stress.

The scientists now plan to use their findings to propose new therapeutic approaches that allow fractures to heal better and bones to remain strong even in old age. In their research in mice, they will now put a special focus on the topic of bone aging.

It may be possible to use drugs in a targeted manner to activate or inhibit the desired genes, but Müller believes vibration therapy or a combination of the two is equally conceivable. “We will see which direction it takes,” says the researcher, although he expects vibration therapy to offer certain advantages. “It’s likely that vibration therapy will involve fewer side effects than treatment using drugs.”

More information:
Neashan Mathavan et al, Spatial transcriptomics in bone mechanomics: Exploring the mechanoregulation of fracture healing in the era of spatial omics, Science Advances (2025). DOI: 10.1126/sciadv.adp8496

Citation:
Mapping gene activity in mechanically stressed bones reveals potential treatment pathways (2025, January 27)
retrieved 27 January 2025
from https://medicalxpress.com/news/2025-01-gene-mechanically-stressed-bones-reveals.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.



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