title: Recovered insulin production after thiamine administration in permanent neonatal diabetes mellitus with a novel solute carrier family 19 member 2 (SLC19A2) mutation.
abstract: BACKGROUND
  Solute carrier family 19 member 2 (SLC19A2) gene deficiency is one of the causes of permanent neonatal diabetes mellitus (PNDM) and can be effectively managed by thiamine supplementation. Herein we report on a male patient with a novel SLC19A2 mutation and summarize the clinical characteristics of patients with SLC19A2 deficiency.
  
  
  METHODS
  The genetic diagnosis of the patient with PNDM was made by sequencing and quantitative polymerase chain reaction. The clinical characteristics of PNDM were summarized on the basis of a systematic review of the literature.
  
  
  RESULTS
  The patient with PNDM had c.848G>A (p.W283X) homozygous mutation in SLC19A2. His father had a wild-type SLC19A2 (c.848G) and his mother was c.848G/A heterozygous. The patient and his father both had a diploid genotype (c.848A/A and c.848G/G). After oral thiamine administration, the patient's fasting C-peptide levels increased gradually, and there was a marked decrease in insulin requirements. A search of the literature revealed that thiamine treatment was effective and improved diabetes in 63% of patients with SLC19A2 deficiency.
  
  
  CONCLUSIONS
  A novel SLC19A2 mutation (c.848G>A; p.W283X) was identified, which was most likely inherited as segmental uniparental isodisomy. Insulin insufficiency in PNDM caused by SLC19A2 deficiency can be corrected by thiamine supplementation. The differential diagnosis of SLC19A2 deficiency should be considered in children with PNDM accompanied by anemia or hearing defects to allow for early treatment.
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Chengjun
authors.initials: C
authors.lastname: Sun
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Pei
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Miaoying
authors.initials: M
authors.lastname: Zhang
authors.affiliation: The Molecular Genetic Diagnosis Center, Pediatrics Research Institute, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Bijun
authors.initials: B
authors.lastname: Sun
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.|The Molecular Genetic Diagnosis Center, Pediatrics Research Institute, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Zhuhui
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Ruoqian
authors.initials: R
authors.lastname: Cheng
authors.affiliation: Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai, China.
authors.forename: Feihong
authors.initials: F
authors.lastname: Luo
mesh_terms: D003920:Diabetes Mellitus / Q000188:drug therapy* / Q000235:genetics / Q000473:pathology; D006720:Homozygote; D006801:Humans; D007223:Infant; D007328:Insulin / Q000172:deficiency / Q000378:metabolism*; D008297:Male; D026901:Membrane Transport Proteins / Q000235:genetics*; D009154:Mutation; D011379:Prognosis; D020127:Recovery of Function; D013831:Thiamine / Q000627:therapeutic use*; D014803:Vitamin B Complex / Q000627:therapeutic use*
chemical_list: D007328:Insulin; D026901:Membrane Transport Proteins; C120043:SLC19A2 protein, human; D014803:Vitamin B Complex; D013831:Thiamine
keywords: neonatal diabetes; permanent neonatal diabetes mellitus; solute carrier family 19 member 2 (SLC19A2); 新生儿糖尿病; 永久性新生儿糖尿病; 溶质运载蛋白家族19成员2基因