Hadad K, Lirenman DS, Lloyd S, Cox J, Thakker RV
Dent's like proximal renal tubular disorder in a First Nations'
kindred.
ASN 30th Annual Meeting, San Antonio
J Am Soc Nephrol
(Sep) 8:389A 1997
Synopsis: A patient from one of the native peoples of Canada was
identified with a syndrome resembling Dent's disease. Dent's disease is a
hereditary cause of Fanconi's syndrome with the distinctive traits of
hypercalciuria, nephrocalcinosis, low molecular weight proteinuria, normal
serum bicarbonate, and slowly progressive renal failure, and is due to
mutations in a chloride channel gene (CLCN5). The patient identified had
hypophosphatemic rickets, low molecular weight proteinuria, aminoaciduria,
hypokalemia, hypercalciuria, and nephrocalcinosis, and several family
members had renal potassium wasting. The sequence of the coding region of
the CLCN5 gene, however, had no mutations. This appears to be a disorder
resembling Dent's disease, but due to a different genetic defect.
Comment: The finding that mutations in a chloride channel
caused Dent's
disease
(Genomics 29: 598-606, 1995) was surprising, and
raised many
questions on the role of the chloride channel in proximal tubular solute and
protein transport. The present study suggests that a second gene causes the
same syndrome. Identification of this gene may help to clarify how the
chloride channel abnormalities could cause this syndrome.
(Stephen L. Gluck MD, Washington University School of Medicine, St.
Louis, MO)
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ASN 30th Annual Meeting, San Antonio
Mg-Ca-PO4 :
Fanconi syndrome