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Compound heterozygous mutation of aquaporin 2 gene in woman patient with congenital nephrogenic diabetes insipidus



Compound heterozygous mutation of aquaporin 2 gene in woman patient with congenital nephrogenic diabetes insipidus



Internal Medicine 48(6): 437-440



We performed mutational analyses of a woman patient with congenital nephrogenic diabetes insipidus referred to us during pregnancy. The diagnosis was made during the neonatal period, after which she was treated with spironolactone and hydrochlorothiazide. Our examination showed the patient to be apparently in good health without definite evidence of dehydration. Serum and urine osmolality were 220 mOsm/L and 50 mOsm/L, respectively, and the serum concentration of AVP was 2.7 pg/mL. Results of a water-deprivation test performed after delivery were compatible with nephrogenic diabetes insipidus. Mutational analyses showed that the patient was a compound heterozygote with point mutations at nucleotide position 298 (G to A; G100R) in exon 1 and nucleotide position 374 (C to T; T125M) in exon 2 of the aquaporin 2 gene, which have been previously described.

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Accession: 052269131

Download citation: RISBibTeXText

PMID: 19293543

DOI: 10.2169/internalmedicine.48.1642


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