title: Different phenotypes of HNF1ß deletion mutants in familial multicystic dysplastic kidneys.
abstract: Multicystic dysplastic kidney (MCDK) is one of the most common congenital abnormalities of the kidney and urinary tract (CAKUT), although its pathophysiology remains unknown. Familial occurrence of MCDK suggests that mutations in genes associated with nephrogenesis are involved in the pathogenesis in at least some cases. Hepatocyte nuclear factor 1β (HNF1β) is a member of the homeodomain-containing super family of transcription factors, and is known to regulate tissue-specific gene expression in a number of organs including the kidneys, pancreas and liver. It has been recently postulated to be associated with CAKUT, including MCDK. We recently encountered a family with a deletion mutant of HNF1β, of which the 2nd son, the proband, developed bilateral MCDK resulting in renal loss of function in infancy while the 1st son developed unilateral MCDK. Their father has two normal kidneys. This family confirmed that mutations in the HNF1β gene are strongly associated with the development of MCDK. Furthermore, the fact that no clear phenotype-genotype correlation exists suggests that gene(s) other than HNF1β are also involved in nephrogenesis and the development of MCDK.
authors.affiliation: Department of Pediatrics, Kansai Medical University, Osaka, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Hasui
authors.forename: Kazunari
authors.initials: K
authors.lastname: Kaneko
authors.forename: Shoji
authors.initials: S
authors.lastname: Tsuji
authors.forename: Yuka
authors.initials: Y
authors.lastname: Isozaki
authors.forename: Takahisa
authors.initials: T
authors.lastname: Kimata
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Nozu
authors.forename: Kandai
authors.initials: K
authors.lastname: Nozu
authors.forename: Kazumoto
authors.initials: K
authors.lastname: Iijima
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000378:metabolism; D002648:Child; D005220:Fathers; D051539:Hepatocyte Nuclear Factor 1-beta / Q000235:genetics*; D006801:Humans; D007223:Infant; D008297:Male; D021782:Multicystic Dysplastic Kidney / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000235:genetics*; D010641:Phenotype; D017384:Sequence Deletion; D035781:Siblings; D016216:Ultrasonography, Prenatal
chemical_list: D015415:Biomarkers; C496495:HNF1B protein, human; D051539:Hepatocyte Nuclear Factor 1-beta