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  • Title: [Osteopetrosis, from mouse to man].
    Author: Blin-Wakkach C, Bernard F, Carle GF.
    Journal: Med Sci (Paris); 2004 Jan; 20(1):61-7. PubMed ID: 14770365.
    Abstract:
    The osteoclast is the main effector of bone resorption. Failure in osteoclast differentiation or function leads to osteopetrosis, a bone disease characterized by an impaired bone resorption. Analysis of mouse models developing osteopetrosis as a consequence of naturally occurring mutations or gene knockouts allowed to establish the osteoclast differentiation pathway. Among these models, the oc/oc, the gl/gl and the Clcn7(-/-) mice present a phenotype similar to the one displayed by patients with infantile malignant osteopetrosis, the most severe form of osteopetrosis in human. Analysis of these models led to the identification of different mutations in the corresponding human genes TCIRG1, GL and CLCN7, in osteopetrotic patients. Mutations in the TCIRG1 gene seem the most frequent cause of malignant osteopetrosis and mutations in the CLCN7 gene seem the most frequent cause of type II osteopetrosis. Therefore, these three mouse models appear to be particularly well suited for the study of the osteoclast function in order to provide new insights in the therapy of osteopetrosis.
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