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  • Title: Mutational survey of the PHEX gene in patients with X-linked hypophosphatemic rickets.
    Author: Ichikawa S, Traxler EA, Estwick SA, Curry LR, Johnson ML, Sorenson AH, Imel EA, Econs MJ.
    Journal: Bone; 2008 Oct; 43(4):663-6. PubMed ID: 18625346.
    Abstract:
    X-linked hypophosphatemic rickets (XLH) is a dominantly inherited disorder characterized by renal phosphate wasting, aberrant vitamin D metabolism, and abnormal bone mineralization. XLH is caused by inactivating mutations in PHEX (phosphate-regulating gene with homologies to endopeptidases on the X chromosome). In this study, we sequenced the PHEX gene in subjects from 26 kindreds who were clinically diagnosed with XLH. Sequencing revealed 18 different mutations, of which thirteen have not been reported previously. In addition to deletions, splice site mutations, and missense and nonsense mutations, a rare point mutation in the 3'-untranslated region (3'-UTR) was identified as a novel cause of XLH. In summary, we identified a wide spectrum of mutations in the PHEX gene. Our data, in accord with those of others, indicate that there is no single predominant PHEX mutation responsible for XLH.
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