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 Genetjournal_title
Clinical geneticsauthors
Gonzalez-Rios MC,Chuang DT,Cox RP,Schmidt K,Knopf K,Packman Sdoi
10.1111/j.1399-0004.1985.tb00203.xsubject
Has Abstractpub_date
1985-02-01 00:00:00pages
153-9issue
2eissn
0009-9163issn
1399-0004journal_volume
27pub_type
杂志文章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
更新日期:2000-03-01 00:00:00
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
更新日期:1991-05-01 00:00:00
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
更新日期:2016-03-01 00:00:00
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
更新日期:2000-10-01 00:00:00
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
更新日期:1978-08-01 00:00:00
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
更新日期:1994-08-01 00:00:00
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
更新日期:2010-02-01 00:00:00
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
更新日期:1979-08-01 00:00:00
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
更新日期:1978-05-01 00:00:00
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
更新日期:1987-12-01 00:00:00
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
更新日期:1981-01-01 00:00:00
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
更新日期:1992-09-01 00:00:00
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
更新日期:2011-10-01 00:00:00
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
更新日期:1992-01-01 00:00:00
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
更新日期:2018-01-01 00:00:00
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
更新日期:1975-09-01 00:00:00
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
更新日期:2002-07-01 00:00:00
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
更新日期:2003-10-01 00:00:00
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
更新日期:2015-09-01 00:00:00
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
更新日期:2010-05-01 00:00:00
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
更新日期:2017-01-01 00:00:00
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
更新日期:1996-07-01 00:00:00
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
更新日期:2015-09-01 00:00:00
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
更新日期:1976-03-01 00:00:00
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
更新日期:2013-12-01 00:00:00
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
更新日期:1977-03-01 00:00:00
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
更新日期:1997-01-01 00:00:00
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
更新日期:1998-03-01 00:00:00
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
更新日期:2016-09-01 00:00:00
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
更新日期:1979-01-01 00:00:00