AIMS: Hepatocyte nuclear factor 1B (HNF1B) gene mutation carriers have a systemic disease characterized by congenital malformations in the urogenital tract, diabetes mellitus of maturity-onset diabetes of the young type and dysfunction of the liver and exocrine pancreas. We aimed to investigate pancreatic structure and exocrine function in carriers of HNF1B mutations. METHODS: We studied five subjects from two families with the previously reported mutation R137_K161del and the novel mutation F148L in HNF1B. All patients underwent computed tomography (CT) and magnetic resonance cholangiopancreatography (MRCP). We measured faecal elastase and serum vitamins D and E. RESULTS: One of the mutation carriers reported abdominal symptoms. All five subjects had faecal elastase deficiency, three had vitamin D deficiency and two had vitamin E deficiency. Neither CT nor MRCP depicted tissue corresponding to the pancreatic body and tail in the five mutation carriers, indicating agenesis of the dorsal pancreas. The head of the pancreas was slightly atrophic but had normal X-ray attenuation at CT in all patients. CONCLUSIONS: Agenesis of the pancreatic body and tail and pancreatic exocrine dysfunction are parts of the phenotype in HNF1B mutation carriers. This strengthens the evidence for a critical role of HNF1B in development and differentiation of at least the dorsal pancreas.
AIMS: Hepatocyte nuclear factor 1B (HNF1B) gene mutation carriers have a systemic disease characterized by congenital malformations in the urogenital tract, diabetes mellitus of maturity-onset diabetes of the young type and dysfunction of the liver and exocrine pancreas. We aimed to investigate pancreatic structure and exocrine function in carriers of HNF1B mutations. METHODS: We studied five subjects from two families with the previously reported mutation R137_K161del and the novel mutation F148L in HNF1B. All patients underwent computed tomography (CT) and magnetic resonance cholangiopancreatography (MRCP). We measured faecal elastase and serum vitamins D and E. RESULTS: One of the mutation carriers reported abdominal symptoms. All five subjects had faecal elastase deficiency, three had vitamin Ddeficiency and two had vitamin E deficiency. Neither CT nor MRCP depicted tissue corresponding to the pancreatic body and tail in the five mutation carriers, indicating agenesis of the dorsal pancreas. The head of the pancreas was slightly atrophic but had normal X-ray attenuation at CT in all patients. CONCLUSIONS: Agenesis of the pancreatic body and tail and pancreatic exocrine dysfunction are parts of the phenotype in HNF1B mutation carriers. This strengthens the evidence for a critical role of HNF1B in development and differentiation of at least the dorsal pancreas.
Authors: Ohn Nyunt; Joyce Y Wu; Ivan N McGown; Mark Harris; Tony Huynh; Gary M Leong; David M Cowley; Andrew M Cotterill Journal: Clin Biochem Rev Date: 2009-05
Authors: Jason Flannick; Nicola L Beer; Alexander G Bick; Vineeta Agarwala; Janne Molnes; Namrata Gupta; Noël P Burtt; Jose C Florez; James B Meigs; Herman Taylor; Valeriya Lyssenko; Henrik Irgens; Ervin Fox; Frank Burslem; Stefan Johansson; M Julia Brosnan; Jeff K Trimmer; Christopher Newton-Cheh; Tiinamaija Tuomi; Anders Molven; James G Wilson; Christopher J O'Donnell; Sekar Kathiresan; Joel N Hirschhorn; Pål R Njølstad; Tim Rolph; J G Seidman; Stacey Gabriel; David R Cox; Christine E Seidman; Leif Groop; David Altshuler Journal: Nat Genet Date: 2013-10-06 Impact factor: 38.330