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    Nat Genet. 2008 Mar;40(3):284-6. Epub 2008 Feb 10.

    Thromboxane synthase mutations in an increased bone density disorder (Ghosal syndrome).

    Geneviève D, Proulle V, Isidor B, Bellais S, Serre V, Djouadi F, Picard C, Vignon-Savoye C, Bader-Meunier B, Blanche S, de Vernejoul MC, Legeai-Mallet L, Fischer AM, Le Merrer M, Dreyfus M, Gaussem P, Munnich A, Cormier-Daire V.

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    Département de Génétique, Unité INSERM U781, Université Paris Descartes, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Necker-Enfants Malades, 149, rue de Sèvres, 75015 Paris, France.

    Abstract

    Studying consanguineous families with Ghosal hematodiaphyseal dysplasia syndrome (GHDD), a disorder of increased bone density, we identified mutations in TBXAS1, which encodes thromboxane synthase (TXAS). TXAS, an enzyme of the arachidonic acid cascade, produces thromboxane A(2) (TXA(2)). Platelets from subjects with GHDD showed a specific deficit in arachidonic acid-produced aggregation. We also found that TXAS and TXA(2) modulated expression of TNFSF11 and TNFRSF11B (encoding RANKL and osteoprotegerin (OPG), respectively) in primary cultured osteoblasts.

    PMID:
    18264100
    [PubMed - indexed for MEDLINE]

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