Gene therapy in orthopaedics

Impressive advances in our knowledge of the molecular genetic basis of skeletal disorders and fracture healing have led to the development of novel therapeutics based on ectopic expression of one or more genes in patient cells that can influence repair or regenerative processes in bone. Gene therapy is an attractive new approach to the treatment of bone disorders. Orthopaedics has become one of the most promising areas of research into gene therapy. This is because many potential orthopaedic targets for gene therapy, unlike traditional targets such as cancer and severe genetic disorders, neither present difficult delivery problems nor require prolonged periods of gene expression. Gene therapy offers new possibilities for the clinical management of orthopaedic conditions that are difficult to treat by traditional surgical or medical means. Impaired bone healing, need for extensive bone formation, cartilage repair and metabolic bone diseases are all conditions where alterations of the signalling peptides involved may provide cure or improvement. In orthopaedic oncology, gene therapy may achieve induction of tumour necrosis and increased tumour sensitivity to chemotherapy. An increasing amount of evidence indicates that gene transfer can aid the repair of articular cartilage, menisci, intervertebral disks, ligaments and tendons. These developments have the potential to transform many areas of musculoskeletal care, leading to treatments that are less invasive, more effective and less expensive than existing modalities.

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