• New technique could be used to grow large amounts of tissue and treat rare muscular diseases

    Scientists have grown the first functioning muscles using  created from skin.

    The breakthrough holds promise for understanding and treating rare muscular diseases.

    Muscles were grown using skin cells that had been “reprogrammed” to an original state, in which they are referred to as pluripotent stem cells.

    These cells can then be encouraged to grow into muscle cells by flooding them with a substance called Pax7.

    The new research was .

    “It’s taken years of trial and error, making educated guesses and taking baby steps to finally produce functioning human muscle from pluripotent stem cells,” said Dr Lingjun Rao, a biomedical engineer at Duke University who co-authored the study.

    Having produced muscle cells in this way, the scientists provided them with structural support and nourishment that allowed them to become functioning muscle.

    Not only did this muscle respond to chemical and electrical signals just like living muscle, the scientists were able to implant it into mice, with some success.

    Though the muscle was not as strong as conventional muscle tissue, it functioned within the mice and began to integrate into pre-existing mouse muscle.

    “The prospect of studying rare diseases is especially exciting for us,” said Professor Nenad Bursac, who co-authored the study.

    In previous work, Professor Bursac and his colleagues had successfully grown muscle from immature muscle cells called “myoblasts”.

    However, if applied in humans this method would involve taking muscle tissue from a patient already suffering from a muscular disease, which could cause further damage.

    The new technique could allow medics to grow new muscle without causing additional harm to their patients.

    “With this technique, we can just take a small sample of non-muscle tissue, like skin or blood, revert the obtained cells to a pluripotent state, and eventually grow an endless amount of functioning muscle fibres to test,” said Professor Bursac.

    According to Professor Bursac, the new method should allow them to create “an unlimited number” of potential muscle cells.

    Stem cells have the potential to benefit many aspects of human health, with research suggesting they could be used to help  and create a .

    However, much of their potential in clinical practice still remains to be seen.

    Using this new technique, the researchers think it might be possible to grow healthy muscle in patients with genetic diseases affecting their muscles, such as Duchenne muscular dystrophy.

    The scientists also hope to create models of such diseases that can be used to discover new treatments.

     

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