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Osteogenesis Imperfecta: Current and Prospective Therapies

Journal

BIOMOLECULES
Volume 11, Issue 10, Pages -

Publisher

MDPI
DOI: 10.3390/biom11101493

Keywords

osteogenesis imperfecta; treatment; mesenchymal stem cells; gene therapy; iPSCs

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Osteogenesis Imperfecta is a group of connective tissue disorders characterized by bone fragility, with five types ranging from mild to lethal. Current treatments aim to prevent fractures, control symptoms, and increase bone mass, but have limitations in effectiveness and side effects. Experimental approaches, including stem cell transplantation and genetic engineering, show promise in improving therapeutic effects.
Osteogenesis Imperfecta (OI) is a group of connective tissue disorders with a broad range of phenotypes characterized primarily by bone fragility. The prevalence of OI ranges from about 1:15,000 to 1:20,000 births. Five types of the disease are commonly distinguished, ranging from a mild (type I) to a lethal one (type II). Types III and IV are severe forms allowing survival after the neonatal period, while type V is characterized by a mild to moderate phenotype with calcification of interosseous membranes. In most cases, there is a reduction in the production of normal type I collagen (col I) or the synthesis of abnormal collagen as a result of mutations in col I genes. Moreover, mutations in genes involved in col I synthesis and processing as well as in osteoblast differentiation have been reported. The currently available treatments try to prevent fractures, control symptoms and increase bone mass. Commonly used medications in OI treatment are bisphosphonates, Denosumab, synthetic parathyroid hormone and growth hormone for children therapy. The main disadvantages of these therapies are their relatively weak effectiveness, lack of effects in some patients or cytotoxic side effects. Experimental approaches, particularly those based on stem cell transplantation and genetic engineering, seem to be promising to improve the therapeutic effects of OI.

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