A distinct variant of intermediate maple syrup urine disease.

Abstract:

:Branched chain alpha-ketoacid dehydrogenase (BCKAD) deficiency, or maple syrup urine disease (MSUD), can be categorized as classical, intermediate, intermittent or thiamine responsive, based on generally concordant in vitro BCKAD activity and severity of phenotype. We present clinical and enzymatic data on a boy with intermediate maple syrup urine disease, and suggest that he represents a novel category of mutation. He presented at age 10 months in ketoacidotic coma, with a history of irritability, poor feeding and growth and developmental delay. Branched chain amino acid restriction effected normal growth and developmental parameters by age 42 months. In contrast to previous patients with intermediate MSUD, his fibroblasts and fibroblast extracts failed to decarboxylate [1-14C]-alpha-ketoisovalerate (KIV). The defect is not in mitochondrial transport of substrate, but rather in the catalytic activity of the E1 component of the BCKAD. Disrupted cells of the proband exhibited negligible BCKAD activity over a wide range of keto acid substrate concentrations, irrespective of the presence of added thiamine pyrophosphate (TPP). These results differ from the sigmoidal kinetics observed using classical MSUD extracts, and the hyperbolic kinetics with control preparations under the same assay conditions. We propose that the structurally altered enzyme possesses reduced but not negligible activity in vivo, and exists as an unstable complex in vitro under assay conditions used, even in the presence of added TPP.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Gonzalez-Rios MC,Chuang DT,Cox RP,Schmidt K,Knopf K,Packman S

doi

10.1111/j.1399-0004.1985.tb00203.x

subject

Has Abstract

pub_date

1985-02-01 00:00:00

pages

153-9

issue

2

eissn

0009-9163

issn

1399-0004

journal_volume

27

pub_type

杂志文章
  • Identification of four novel mutations of the low-density lipoprotein receptor gene in Korean patients with familial hypercholesterolemia.

    abstract::To obtain insight into the genetic variation of the low-density lipoprotein (LDL) receptor gene in Korean patients with familial hypercholesterolemia (FH), we used single-strand conformation polymorphism to screen all 18 exons and a promotor of the LDL receptor gene in 20 unrelated Korean FH patients. Four novel point...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1034/j.1399-0004.2000.570309.x

    authors: Shin JA,Kim SH,Kim UK,Chae JJ,Choe SJ,Namkoong Y,Kim HS,Park YB,Lee CC

    更新日期:2000-03-01 00:00:00

  • Cutis laxa: autosomal dominant inheritance in five generations.

    abstract::Cutis laxa is described in three cases: a 17-year-old man, his mother and his maternal grandmother. The onset of skin symptoms occurred from puberty to early adulthood. The skin was loose-hanging, wrinkled and without elasticity. X-ray examination showed numerous gastrointestinal diverticulae in the two older patients...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1991.tb03038.x

    authors: Damkier A,Brandrup F,Starklint H

    更新日期:1991-05-01 00:00:00

  • Comorbidity in the Tunisian population.

    abstract::Genetic diseases in the Tunisian population represent a real problem of public health as their spectrum encompasses more than 400 disorders. Their frequency and distribution in the country have been influenced by demographic, economic and social features especially consanguinity. In this article, we report on genetic ...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/cge.12616

    authors: Romdhane L,Messaoud O,Bouyacoub Y,Kerkeni E,Naouali C,Cherif Ben Abdallah L,Tiar A,Charfeddine C,Monastiri K,Chabchoub I,Hachicha M,Tadmouri GO,Romeo G,Abdelhak S

    更新日期:2016-03-01 00:00:00

  • Single nucleotide polymorphisms and the future of genetic epidemiology.

    abstract::In this review, we consider the motivation behind contemporary single nucleotide polymorphism (SNP) initiatives. Many of these initiatives are projected to involve large, population-based surveys. We therefore emphasize the utility of SNPs for genetic epidemiology studies. We start by offering an overview of genetic p...

    journal_title:Clinical genetics

    pub_type: 杂志文章,评审

    doi:10.1034/j.1399-0004.2000.580402.x

    authors: Schork NJ,Fallin D,Lanchbury JS

    更新日期:2000-10-01 00:00:00

  • Cluster of cystic fibrosis cases in a limited area of Brittany (France).

    abstract::Cystic fibrosis in the northern sector of the French "département" of Finistère is 1:1787 live births. Within this sector a concentration of the disease was found in a small area. The minimal frequency in this area, from 1946 to 1972, was calculated as 1 per 377 live births, the gene frequency being 0.0515. Genealogic...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1978.tb02108.x

    authors: Bois E,Feingold J,Demenais F,Runavot Y,Jehanne M,Toudic L

    更新日期:1978-08-01 00:00:00

  • Osteoarthropathia psoriatica of one leg: a manifestation of somatic mosaicism?

    abstract::A psoriatic osteoarthropathy localized in the left quadrant of a male patient is described. Diagnosis was made on the basis of bone scintigraphy (specific distribution pattern) and histological evaluation of a bone biopsy. There is no indication of psoriasis in the patient's family. Nor is there an association to psor...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1994.tb04223.x

    authors: Holzmann H,Schmitt M,Happle R,Kaltwasser P,Hör G

    更新日期:1994-08-01 00:00:00

  • Further genotype--phenotype correlations in neurofibromatosis 2.

    abstract::Neurofibromatosis 2 (NF2) is caused by mutations in the NF2 gene predisposing carriers to develop nervous system tumours. Different NF2 mutations result in either loss/reduced protein function or gain of protein function (abnormally behaving mutant allele i.e. truncated protein potentially causing dominant negative ef...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.2009.01315.x

    authors: Selvanathan SK,Shenton A,Ferner R,Wallace AJ,Huson SM,Ramsden RT,Evans DG

    更新日期:2010-02-01 00:00:00

  • Catecholamine metabolism in familial amyloid polyneuropathy.

    abstract::In order to evaluate the involvement of the peripheral autonomic nervous system in the pathogenesis of type 1 familial amyloid polyneuropathy, the urinary excretion rates of catecholamines and serum dopamine-beta-hydroxylase (DB/) activity were examined in 22 patients at various clinical stages. Changes in both indice...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1979.tb00860.x

    authors: Suzuki T,Tsuge I,Higa S,Hayashi A,Yamamura Y,Takaba Y,Nakajima A

    更新日期:1979-08-01 00:00:00

  • Central nervous system abnormalities--contrasting patterns in early and late pregnancy.

    abstract::A total of 509 specimens of spontaneous abortion were studied. Of 364 complete specimens, 15 (4.1%) had central nervous system (CNS) abnormalities. The defects which were seen were anencephaly, spina bifida, iniencephaly, encephalocele and anencephaly combined with complete rachischisis. A high proportion (five out of...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1978.tb04136.x

    authors: Bell JE,Gosden CM

    更新日期:1978-05-01 00:00:00

  • Isolated autosomal recessive renal magnesium loss in two sisters.

    abstract::A familial autosomal recessive form of isolated renal magnesium loss is presented. Two children in this family suffered from convulsions unrelated to hypomagnesemia. Magnesium infusion studies revealed a lowered threshold but a normal tubular maximum for magnesium. In contrast to two families with the autosomal domina...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1987.tb03157.x

    authors: Geven WB,Monnens LA,Willems JL,Buijs W,Hamel CJ

    更新日期:1987-12-01 00:00:00

  • Abnormality of chromosome 16 and its phenotypic expression.

    abstract::An abnormality of chromosome 16 in which there is extra genetic material present on the short arm (46,XY, 16p+) has been identified. This chromosomal aberration was associated with multiple congenital anomalies, including mid-facial hypoplasia, arthrogryposis, and mental retardation. On the basis of the cytogenetic ap...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1981.tb00665.x

    authors: Golden NL,Bilenker R,Johnson WE,Tischfield JA

    更新日期:1981-01-01 00:00:00

  • Cleft palate and complex chromosome rearrangements.

    abstract::Two of three unrelated children with de novo congenital complex chromosome rearrangements (CCR) with more than four chromosome breaks had cleft lip and palate as one of several congenital anomalies. In patient 1, unilateral complete cleft of the primary and secondary palates accompanied severe ectrodactyly, bilateral ...

    journal_title:Clinical genetics

    pub_type: 杂志文章,评审

    doi:10.1111/j.1399-0004.1992.tb03225.x

    authors: Kousseff BG,Papenhausen P,Neu RL,Essig YP,Saraceno CA

    更新日期:1992-09-01 00:00:00

  • Haplotype analysis of two recurrent genomic rearrangements in the BRCA1 gene suggests they are founder mutations for the Greek population.

    abstract::The deletions of 4.4 and 3.2 kb identified in exons 24 and 20, respectively, are two of the four most common mutations in the BRCA1 gene in Greek breast cancer patients. They have been reported previously six and three times, respectively, in unrelated Greek families. A total of 11 more families have been identified i...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.2010.01532.x

    authors: Pertesi M,Konstantopoulou I,Yannoukakos D

    更新日期:2011-10-01 00:00:00

  • Birth prevalence studies of the Crouzon syndrome: comparison of direct and indirect methods.

    abstract::An indirect method for estimating the birth prevalence of the Crouzon syndrome is presented. The fraction of Crouzon syndrome patients in large clinical surveys of all cases of craniosynostosis is calculated and the fractional component obtained is multiplied by the known birth prevalence of craniosynostosis in genera...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1992.tb03620.x

    authors: Cohen MM Jr,Kreiborg S

    更新日期:1992-01-01 00:00:00

  • Clinical genetic testing in pediatric cardiomyopathy: Is bigger better?

    abstract:BACKGROUND:For clinical genetic testing of cardiomyopathy (CMP), current guidelines do not address which gene panels to use: targeted panels specific to a CMP phenotype or expanded (panCMP) panels that include genes associated with multiple phenotypic subtypes. AIM:Our objective was to assess the clinical utility of t...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/cge.13024

    authors: Ouellette AC,Mathew J,Manickaraj AK,Manase G,Zahavich L,Wilson J,George K,Benson L,Bowdin S,Mital S

    更新日期:2018-01-01 00:00:00

  • Detection of inborn errors of metabolism. IV. Galactokinase deficiency.

    abstract::Galactokinase deficient fibroblasts are not distinguishable from galactosemic fibroblasts by a test suggested earlier by Hill & Puck (1973). They can be so distinguished by the test described here, since they are unable to incorporate radioactive galactose into TCA-insoluble material under normal conditions of incubat...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1975.tb01491.x

    authors: Hill HZ

    更新日期:1975-09-01 00:00:00

  • DGAT1 promoter polymorphism associated with alterations in body mass index, high density lipoprotein levels and blood pressure in Turkish women.

    abstract::Triglyceride synthesis is catalyzed by acyl CoA:diacylglycerol acyltransferases (DGAT), microsomal enzymes that use diacylglycerol and fatty acyl CoAs as substrates. Because DGAT1 expression is up-regulated during adipocyte differentiation and DGAT1 deficiency is associated with leanness in mice, we hypothesized that ...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1034/j.1399-0004.2002.620109.x

    authors: Ludwig EH,Mahley RW,Palaoglu E,Ozbayrakçi S,Balestra ME,Borecki IB,Innerarity TL,Farese RV Jr

    更新日期:2002-07-01 00:00:00

  • Split hand foot malformation is associated with a reduced level of Dactylin gene expression.

    abstract::Split hand foot malformation (SHFM) is a congenital limb malformation presenting with a median cleft of the hand and/or foot, syndactyly and polydactyly. SHFM is genetically heterogeneous with four loci mapped to date. Murine Dactylaplasia (Dac) is phenotypically similar, and it has been mapped to a syntenic region of...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1034/j.1399-0004.2003.00153.x

    authors: Basel D,DePaepe A,Kilpatrick MW,Tsipouras P

    更新日期:2003-10-01 00:00:00

  • Pancreatic cancer genomics: where can the science take us?

    abstract::The incidence of pancreatic ductal adenocarcinoma (PDAC) is steadily increasing and the annual death-to-incidence ratio approaches one. This is a figure that has not changed for several decades. Surgery remains the only chance of cure; however, only less than 20% of patients are amenable to operative resection. Despit...

    journal_title:Clinical genetics

    pub_type: 杂志文章,评审

    doi:10.1111/cge.12536

    authors: Graham JS,Jamieson NB,Rulach R,Grimmond SM,Chang DK,Biankin AV

    更新日期:2015-09-01 00:00:00

  • Clinical and molecular aspects of aniridia.

    abstract::Aniridia is a severe, congenital ocular malformation inherited in an autosomal-dominant fashion with high penetrance and variable expression. Eye morphogenesis in humans involves a molecular genetic cascade in which a number of developmental genes interact in a highly organized process during the embryonic period to p...

    journal_title:Clinical genetics

    pub_type: 杂志文章,评审

    doi:10.1111/j.1399-0004.2010.01372.x

    authors: Kokotas H,Petersen MB

    更新日期:2010-05-01 00:00:00

  • The clinical spectrum of female epilepsy patients with PCDH19 mutations in a Chinese population.

    abstract::Mutations in PCDH19, which encodes protocadherin 19, have been identified in epilepsy, mainly in affected females. We summarized the clinical spectrum of female epilepsy patients with PCDH19 mutations in a Chinese population. We screened for PCDH19 mutations in 75 girls diagnosed with Dravet syndrome (DS) without a SC...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/cge.12846

    authors: Liu A,Xu X,Yang X,Jiang Y,Yang Z,Liu X,Wu Y,Wu X,Wei L,Zhang Y

    更新日期:2017-01-01 00:00:00

  • Presymptomatic molecular diagnosis of autosomal dominant polycystic kidney disease using PKD1- and PKD2-linked markers in Cypriot families.

    abstract::Autosomal dominant polycystic kidney disease (ADPKD), is a heterogeneous disorder, primarily characterized by the formation of cysts in the kidneys, and the late development in life of progressive chronic kidney failure. Three genes are implicated in causing ADPKD. One on chromosome 16, PKD1, accounts for 85-90% of al...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1996.tb02339.x

    authors: Deltas CC,Christodoulou K,Tjakouri C,Pierides A

    更新日期:1996-07-01 00:00:00

  • Genetics of human isolated hereditary hair loss disorders.

    abstract::Hereditary hair loss in human is a group of clinically and genetically heterogeneous disorders. It is characterized by sparse to complete absence of hair on the scalp and other parts of the body. In few cases tightly curled twisted wooly hair (WH) on the scalp has been reported as well. The hair loss disorders, includ...

    journal_title:Clinical genetics

    pub_type: 杂志文章,评审

    doi:10.1111/cge.12531

    authors: Basit S,Khan S,Ahmad W

    更新日期:2015-09-01 00:00:00

  • X-linked ichthyosis, bilateral cryptorchidism, hypogenitalism and mental retardation in two siblings.

    abstract::Two brothers showed ichthyosis, bilateral cryptorchidism, hypogenitalism and mental retardation. In addition, the younger brother had short stature associated with disorders of secretions of insulin, ACTH and GH. This is the third reported case of the syndrome of ichthyosis and hypogonadism. ...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1976.tb01583.x

    authors: Abe K,Matsuda I,Matsuura N,Murayama T,Uzuki K,Okuno A

    更新日期:1976-03-01 00:00:00

  • A population-based study of hereditary non-polyposis colorectal cancer: evidence of pathologic and genetic heterogeneity.

    abstract::Hereditary non-polyposis colorectal cancer (HNPCC) may be the result of Lynch syndrome (LS) caused by mutations in mismatch repair (MMR) genes, a syndrome of unknown etiology called familial colorectal cancer type-X (FCCTX), or familial serrated neoplasia associated with the colorectal cancer (CRC) somatic BRAF mutati...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/cge.12080

    authors: Warden G,Harnett D,Green J,Wish T,Woods MO,Green R,Dicks E,Rahman P,Zhai G,Parfrey P

    更新日期:2013-12-01 00:00:00

  • Genetic heterogeneity of hypoxanthine-phosphoribosyl transferase in human fibroblasts of 3 families.

    abstract::Incorporation of hypoxanthine, resistance to 8-azaguanine and activation by lyophilisation have been studied in cultured human fibroblasts. Cells from one family where there was a boy with Lesch-Nyham syndrome, from two families with variant H-PRT mutations and three cell strains from patients with the Lesch-Nyham syn...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1977.tb01299.x

    authors: Willers I,Held KR,Singh S,Goedde HW

    更新日期:1977-03-01 00:00:00

  • Association analysis of CA repeat polymorphism of the endothelial nitric oxide synthase gene with essential hypertension in Japanese.

    abstract::The nitric oxide synthase (NOS) gene is thought to be associated with essential hypertension (EH), because NO is implicated in endothelium-mediated vasodilation. We investigated the possible association between the alleles of simple tandem repeat DNA polymorphism of the endothelial constitutive NOS (cNOS) gene and EH ...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1997.tb02409.x

    authors: Nakayama T,Soma M,Takahashi Y,Izumi Y,Kanmatsuse K,Esumi M

    更新日期:1997-01-01 00:00:00

  • Implications of genotyping of spouses to limit investigation of children in genetic hemochromatosis.

    abstract:BACKGROUND:A genetic test for hemochromatosis has allowed for the first time, genotypic identification of heterozygotes. The purpose of this study is to determine whether genotyping of spouses of homozygotes results in fewer investigations of children and subsequent cost savings. METHODS:Two hundred and ninety one chi...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1998.tb02672.x

    authors: Adams PC

    更新日期:1998-03-01 00:00:00

  • Mutational and phenotypical spectrum of phenylalanine hydroxylase deficiency in Denmark.

    abstract::We describe the genotypes of the complete cohort, from 1967 to 2014, of phenylketonuria (PKU) patients in Denmark, in total 376 patients. A total of 752 independent alleles were investigated. Mutations were identified on 744 PKU alleles (98.9%). In total, 82 different mutations were present in the cohort. The most fre...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/cge.12692

    authors: Bayat A,Yasmeen S,Lund A,Nielsen JB,Møller LB

    更新日期:2016-09-01 00:00:00

  • alpha1-Antitrypsin deficiency in twins and parents-of-twins.

    abstract::Serum-trypsin-inhibitory-capacity (STIC) and alpha1-antitrypsin (AAT) genotypes were evaluated in 83 twins and 112 paired parents-of-twins. An increased prevalence (17.0--21.9%) of intermediate AAT deficiency (STIC less than 0.95 units/ml) was detected in both of these groups as compared to a prevalence of 4.1% in 1,8...

    journal_title:Clinical genetics

    pub_type: 杂志文章

    doi:10.1111/j.1399-0004.1979.tb02026.x

    authors: Lieberman J,Borhani NO,Feinleib M

    更新日期:1979-01-01 00:00:00