Hepatocyte Nuclear Factor-1β: A New Kindred with Renal Cysts and Diabetes and Gene Expression in Normal Human Development

Author:

KOLATSI-JOANNOU MARIA,BINGHAM CORALIE,ELLARD SIAN,BULMAN MICHAEL P.,ALLEN LISA I. S.,HATTERSLEY ANDREW T.,WOOLF ADRIAN S.

Abstract

Abstract. The hepatocyte nuclear factor—1β (HNF-1β) transcription factor controls endoderm development. Human mutations cause early-onset diabetes mellitus and have recently been associated with dysplastic, hypoplastic, and glomerulocystic kidneys. A new kindred with this “renal cysts and diabetes” syndrome is described, and nephrogenic HNF-1β expression is defined. The proband had congenital cystic kidneys: over the next 12 yr, his renal function was impaired, but he was normoglycemic. His mother developed diabetes during pregnancy: renal ultrasonography at age 24 yr was normal, but she subsequently developed cysts. Both subjects have a heterozygous frameshift mutation inHNF-1β that results from a 1-bp insertion in exon 5 (Y352fsinsA). When reverse-transcription PCR andin situhybridization were used, HNF-1β mRNA was detected in normal human metanephroi, with the highest levels of transcripts localized to fetal medullary and cortical collecting ducts and low levels of expression in nephrogenic cortex mesenchyme, primitive nephron tubules, and immature glomeruli. These results constitute the first demonstration of HNF-1β expression during human nephrogenesis and emphasize a disease spectrum associated withHNF-1β mutation.

Publisher

American Society of Nephrology (ASN)

Subject

Nephrology,General Medicine

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