Science Advances: mRNA technology enters new field: used to treat fractures and bone defects, promote bone regeneration

In addition to being used in infectious disease vaccines, mRNA, as a platform technology, has broad application space.
mRNA technology leaders Moderna and BioNTech have already started related research on mRNA cancer vaccines
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Recently, researchers from the Mayo Clinic in the United States published a research paper entitled: Efficient healing of large osseous segmental defects using optimized chemically modified messenger RNA encoding BMP-2 in the journal Science Advances
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Efficient healing of large osseous segmental defects using optimized chemically modified messenger RNA encoding BMP-2

This study demonstrates that the use of chemically modified mRNA encoding the BMP-2 protein can induce bone regeneration to repair segmental defects in long bones
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This provides an innovative, safe and highly translatable technique for bone healing

Segmental bone defects do not heal well and remain a major clinical problem that can lead to amputations, and regenerative medicine offers new hope for restoring and regenerating solid bone
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BMP-2 is a natural protein in the body that promotes the development of bone and cartilage
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As early as 2002, the FDA approved Medtronic's implants based on recombinant human BMP-2 protein as bone graft materials

The Mayo team believes that encoding BMP-2 protein through mRNA may be a potential way to promote bone regeneration
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Human bone regenerates in two ways: directly from mesenchymal progenitor cells to form osteocytes, or through endochondral ossification, where cartilage is first formed and then transformed into bone
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Recombinant BMP-2 protein therapy utilizes the former approach, while mRNA therapy utilizes the latter approach

The research team conducted experiments in a rat bone defect model.
The chemically modified mRNA (cmRNA) encoding BMP-2 was delivered through a lipid carrier and injected at the truncation site of the femur.
The mRNA was able to continuously produce BMP-2 protein in situ, with almost no Escape to other tissues and organs
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On day 5 post-injection, protein expression decayed to low levels

The experimental results showed that the missing bones of the rats in the 50 microgram treatment group had all been bridged and healed at the 4th week, and the regenerated bones showed mechanical properties equivalent to those of natural bones, which were significantly better than those treated with recombinant BMP-2 protein.
group
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The team said that mRNA was chosen over DNA because mRNA can be delivered via non-viral vectors, which are cheaper
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And mRNA does not integrate into the human genome and only exists in the body for a short period of time, so it is safer

The success of the mRNA new crown vaccine has encouraged scientists around the world to explore the application of mRNA in other fields
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Just on January 6 this year, researchers at the Perelman School of Medicine at the University of Pennsylvania published a paper in Science

The research team developed a transient engineered CAR-T cell therapy generated in vivo, which reprogrammed T cells to recognize cardiac fibrotic cells by injecting mRNA delivered by lipid nanoparticles (LNPs), thereby reducing fibrosis and reducing fibrosis.

This method is similar to an mRNA vaccine.

Overall, this study by the Mayo team shows that in bone healing, mRNA technology promises better results, lower prices, and better safety than traditional gene therapy or recombinant protein approaches.

Original source:

Original source:

RODOLFO E.

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