title: Novel A219P mutation of hydroxymethylbilane synthase identified in a Chinese woman with acute intermittent porphyria and syndrome of inappropriate antidiuretic hormone.
abstract: Acute intermittent porphyria (AIP) is an autosomal dominant metabolic disorder caused by deficiency of the heme biosynthetic enzyme hydroxymethylbilane synthase (approved gene symbol HMBS), also known as porphobilinogen deaminase (PBGD). AIP is characterised by intermittent attacks of abdominal pain, vomiting, and neurological complaints. The highly variable symptomatic presentation of AIP causes confusion with other diseases and results in a high misdiagnosis rate (68% in China) and delayed effective treatments. Based on biochemical and genetic analysis of two Chinese families, a new and a previously reported HMBS mutation were identified in patients with AIP and syndrome of inappropriate antidiuretic hormone (SIADH). The novel HMBS mutation is the 655G>C point mutation (A219P). In addition, the 973C>T point mutation (R325X), which had been previously reported in two Danish families, was identified.
authors: Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University.
authors: Yingjie
authors: Y
authors: Li
authors: Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University.
authors: Hua
authors: H
authors: Qu
authors: Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University.
authors: Hang
authors: H
authors: Wang
authors: Department of Endocrinology, the First Affiliated Hospital of Chongqing Medical University.
authors: Huacong
authors: H
authors: Deng
authors: Clinical Laboratory, Guiyang Provincial People's Hospital, 55002, Guiyang, Guizhou Province, China.
authors: Ziyan
authors: Z
authors: Liu
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D005260:Female; D006801:Humans; D011163:Hydroxymethylbilane Synthase / Q000235:genetics*; D007177:Inappropriate ADH Syndrome / Q000235:genetics; D008875:Middle Aged; D017118:Porphyria, Acute Intermittent / Q000175:diagnosis / Q000235:genetics*; D055815:Young Adult
chemical_list: D011163:Hydroxymethylbilane Synthase
keywords: Acute intermittent porphyria; Chinese; HMBS; syndrome of inappropriate antidiuretic hormone