Abstract:
:XLH (X-linked hypophosphataemia, gene symbol HYP, McKusick 307800, 307810) and its murine counterparts (Hyp and Gy) map to a conserved segment on the X-chromosome (Xp 22.31-p.21.3, human; distal X, mouse). Gene dosage has received relatively little attention in the long history of research on this disease, which began over 50 years ago. Bone and teeth are sites of the principal disease manifestations in XLH (rickets, osteomalacia, interglobular dentin). Newer measures of quantitative XLH phenotypes reveal gene dose effects in bone and teeth with heterozygous values distributed between those in mutant hemizygotes and normal homozygotes. On the other hand, serum phosphate concentrations (which are low in the mutant phenotype and thereby contribute to bone and tooth phenotypes) do not show gene dosage. In Hyp mice serum values in mutant hemizygotes, mutant homozygotes and heterozygotes are similar. Phosphate homeostasis reflects its renal conservation. Renal absorption of phosphate on a high-affinity, Na+ ion-gradient coupled system in renal brush border membrane is impaired and gene dosage is absent at this level; the mutant phenotype is fully dominant. Synthesis and degradation of 1,25(OH)2D are also abnormal in XLH (and Hyp), but gene dosage in these parameters has not yet been measured. An (unidentified) inhibitory trans-acting product of the X-linked locus, affecting phosphate transport and vitamin D metabolism, acting perhaps through cytosolic protein kinase C, could explain the renal phenotype. But why would it have a normal gene dose effect in bone and teeth? Since the locus may have duplicated (to form Hyp and Gy), and shows evidence of variable expression in different organs (inner ear, bone/teeth, kidney), it may have been recruited during evolution to multiple functions.
journal_name
J Inherit Metab Disjournal_title
Journal of inherited metabolic diseaseauthors
Scriver CR,Tenenhouse HSdoi
10.1007/BF01799618keywords:
subject
Has Abstractpub_date
1992-01-01 00:00:00pages
610-24issue
4eissn
0141-8955issn
1573-2665journal_volume
15pub_type
杂志文章,评审abstract::Adult-onset glycogen storage disease type II (GSD II) (McKusick 232300) is a progressive disabling myopathy. At present there is no treatment of proven clinical efficacy. Enzyme replacement therapy may in the future provide benefit but it will be costly and is not yet freely available. L-Alanine, a simple and relative...
journal_title:Journal of inherited metabolic disease
pub_type: 临床试验,杂志文章
doi:10.1007/s10545-006-0238-7
更新日期:2006-02-01 00:00:00
abstract::Aldolase B is critical for sugar metabolism, and a catalytic deficiency due to mutations in its gene may result in hereditary fructose intolerance (HFI) syndrome, with hypoglycaemia and severe abdominal symptoms. This report describes two cases of HFI, which were identified by intravenous fructose tolerance test and a...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1023/a:1022043307569
更新日期:2002-11-01 00:00:00
abstract::As more states adopt expanded newborn screening for metabolic disorders, the overall number of false positives increases. False-positive screening results have been associated with increased anxiety and stress in parents of infants who require follow-up testing, even after the infant's good health is confirmed. This a...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1007/s10545-006-0381-1
更新日期:2006-10-01 00:00:00
abstract:UNLABELLED:In pilot studies of the usefulness of solid state nuclear magnetic resonance spectroscopy in characterizing chemical and molecular structural effects of alkaptonuria on connective tissue, we have obtained (13) C spectra from articular cartilage from an AKU patient. An apparently normal anatomical location yi...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-011-9373-x
更新日期:2011-12-01 00:00:00
abstract::Massive production and accumulation of a single abnormal protein may constitute a major toxic burden for the cell and even compromise the organism's long-term viability. Consequently, adaptation and survival have forced evolution to create 'quality control' mechanisms that detect, monitor, and often degrade such abnor...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1007/s10545-006-0251-x
更新日期:2006-04-01 00:00:00
abstract::In many European countries neonatal screening has been introduced over the last 50 years as an important public health programme. Depending on health care structure, available funds, local politics, input from professional groups, parent groups, and the general public this introduction has led to different approaches ...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-012-9483-0
更新日期:2012-07-01 00:00:00
abstract::Recent studies have identified a role for supraphysiological gamma-aminobutyric acid (GABA) in the regulation of mechanistic target of rapamycin (mTOR), a protein kinase with pleiotropic roles in cellular development and homeostasis, including integration of growth factors and nutrient sensing and synaptic input in ne...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-016-9959-4
更新日期:2016-11-01 00:00:00
abstract:BACKGROUND:One major problem of using hypercholesterolaemia alone as a primary criterion for diagnosing familial hypercholesterolaemia (FH) is that 15-40% of relatives may be misdiagnosed because plasma lipid levels in FH heterozygotes overlap with those in the general population. SETTING:General Hospital/University o...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-007-0563-5
更新日期:2007-04-01 00:00:00
abstract:OBJECTIVES:To study the incidence of galactosaemia in the state of São Paulo and the benefit/cost (B/C) ratio of the introduction of neonatal screening for galactosaemia, comparing it with a selective approach. METHODS:An enzymatic-colorimetric assay was used for the screening of total galactose (TG) in a sample of 10...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-009-1112-1
更新日期:2009-12-01 00:00:00
abstract::There are a number of reasons for choosing ornithine transcarbamylase (OTC) deficiency as a candidate for gene therapy: the gene has been cloned; the disorder is relatively common; the current clinical outcome is poor; and there are authentic animal models. In considering the development of gene therapy for OTC defici...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1023/a:1005369926784
更新日期:1998-01-01 00:00:00
abstract::This workshop was organized as a direct response to concerns and queries raised by laboratory personnel, both in Europe and in the United States, about the imminent withdrawal of Beckman Coulter from the amino acid analysis market. The topics covered included external quality control schemes, standard operating proced...
journal_title:Journal of inherited metabolic disease
pub_type:
doi:10.1023/a:1010343707174
更新日期:2001-04-01 00:00:00
abstract::We examined the value of the fasting plasma phenylalanine/tyrosine ratio obtained in an ordinary clinical setting for assessing the probability of being a heterozygote for hyperphenylalaninaemia. This biochemical test was found to be of little value in those with a high (66%) prior risk of heterozygosity, because it c...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/BF00711323
更新日期:1993-01-01 00:00:00
abstract::For over two decades, nitisinone (NTBC) has been successfully used to manipulate the tyrosine degradation pathway and save the lives of many children with hereditary tyrosinaemia type 1. More recently, NTBC has been used to halt homogentisic acid accumulation in alkaptonuria (AKU) with evidence suggesting its efficacy...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1002/jimd.12229
更新日期:2020-09-01 00:00:00
abstract::A survey is given of literature reports on the effect of performance in offspring from 26 maternal PKU pregnancies treated prior to conception. The survey includes two women who were referred to us for genetic counselling because they had both given birth to microcephalic, mentally retarded children. The women were di...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/BF01799522
更新日期:1990-01-01 00:00:00
abstract::Understanding the relationship between genotype and clinical phenotype will clearly aid in the prognosis, treatment and counselling of patients with lysosomal storage diseases (LSDs). This, however, will require the establishment of widely accepted indices with which to score the severity of LSDs, as these diseases ar...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1023/a:1012419823739
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:Methylmalonic acidemia and intracellular cobalamin metabolism disorders represent a heterogeneous group of inborn errors of metabolism. Most patients will require diagnostic and/or therapeutic procedures frequently requiring sedation or anesthetic management due to neurological and neurocognitive impairments...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1007/s10545-015-9816-x
更新日期:2015-09-01 00:00:00
abstract::The clinical problems, dietary management and biochemical monitoring over a 40-year period of the longest-surviving patient with maple syrup urine disease are described. Her case illustrates that a good outcome can be obtained with early diagnosis and institution of a diet restricted in branched-chain amino acids. Cha...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-006-0204-4
更新日期:2006-02-01 00:00:00
abstract::5-Oxoprolinuria is primarily associated with inborn errors of the gamma-glutamyl cycle. In addition, transient 5-oxoprolinuria has been reported to occur in a variety of conditions, such as prematurity and malnutrition, and during medication. We report an unusual case of permanent 5-oxoprolinuria. The patient presente...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-006-0370-4
更新日期:2006-08-01 00:00:00
abstract::Patients with Fabry disease frequently develop left ventricular (LV) hypertrophy and renal fibrosis. Due to heat intolerance and an inability to sweat, patients tend to avoid exposure to sunlight. We hypothesized that subsequent vitamin D deficiency may contribute to Fabry cardiomyopathy. This study investigated the v...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-013-9653-8
更新日期:2014-03-01 00:00:00
abstract::Carnitine palmitoyltransferase type II (CPT II) deficiency has three basic phenotypes, late-onset muscular (mild), infantile/juvenile hepatic (intermediate) and severe neonatal. We have measured fatty acid oxidation and CPT II activity and performed mutation studies in 24 symptomatic patients representing the full cli...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1023/a:1025947930752
更新日期:2003-01-01 00:00:00
abstract::There is now strong evidence for the implication of collagen alpha 1(I), alpha 2(I) and alpha 1(III) mutations in many forms of osteogenesis imperfecta and inherited arterial aneurysms (Ehlers Danlos syndrome type IV). A sizeable proportion of these disorders have detectable abnormalities by conventional protein chemi...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1007/BF01799292
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND:Hearing loss and tinnitus are common symptoms in Fabry disease and increase in prevalence with age. This study aimed to provide an epidemiological description of hearing impairment and tinnitus in children with Fabry disease in the Fabry Outcome Survey (FOS), an international database to assess the natural h...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,多中心研究
doi:10.1007/s10545-009-1290-x
更新日期:2009-12-01 00:00:00
abstract::There is a failure of growth in hypoxanthine guanine phosphoribosyltransferase deficiency; slow weight gain is marked after the second year of age but is apparent in the birth weights of all eight of our patients for whom we have data. However, head growth and bone development are less affected than weight. A partial ...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/BF01800063
更新日期:1987-01-01 00:00:00
abstract::Detailed biochemical studies have been carried out in a female heterozygote for ornithine carbamoyl-transferase (OCT) deficiency. Increased levels of the pyrimidines, orotic acid, uridine and uracil, were observed in plasma as well as urine by utilizing an adaptation of high performance liquid chromatography (HPLC). U...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/BF02263578
更新日期:1981-01-01 00:00:00
abstract::Thirty patients with early and continuously treated phenylketonuria (PKU) between 8 and 20 years of age were compared with 30 controls, matched individually for age, sex, and educational level of both parents, on behaviour rating scales for parents and teachers as well as a school achievement scale. PKU patients, as a...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1023/a:1005669610722
更新日期:2000-09-01 00:00:00
abstract::The mitochondrial myopathies or encephalomyopathies with known biochemical defects can be divided into 5 groups: (1) defects of mitochondrial transport, such as CPT deficiency or carnitine deficiencies; (2) defects of substrate utilization, such as PDHC deficiency or defects of beta-oxidation; (3) defects of the Krebs...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1007/BF01812852
更新日期:1987-01-01 00:00:00
abstract::The Mendelian disorder known as 3-methylgutaconic aciduria (McKusick 250950) gives evidence of allelic and locus heterogeneity. Type 1 has a mild clinical phenotype and confirmed 3-methylgutaconyl-CoA hydratase deficiency; inheritance is autosomal recessive. Other forms have major clinical manifestations and subdivide...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/BF01799632
更新日期:1992-01-01 00:00:00
abstract::Fabry disease is an X-linked inherited lysosomal storage disorder caused by an inborn deficiency of the enzyme α-galactosidase A. Enzyme replacement therapy (ERT) with agalsidase alpha or beta isozymes is an effective treatment. Cross-reactivity of immunoglobulin G (IgG) antibodies with agalsidase alpha and beta has b...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1007/s10545-010-9136-0
更新日期:2010-12-01 00:00:00
abstract::In addition to systemic manifestations with skeletal, pulmonary, renal, and haematological signs, lysinuric protein intolerance (LPI), a membrane transport defect of cationic amino acids, is often complicated by severe life-threatening immunological manifestations. A 10-year-old boy with LPI who exhibited a severe sys...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章
doi:10.1023/a:1005383307100
更新日期:1998-04-01 00:00:00
abstract::Creatine transporter deficiency was discovered in 2001 as an X-linked cause of intellectual disability characterized by cerebral creatine deficiency. This review describes the current knowledge regarding creatine metabolism, the creatine transporter and the clinical aspects of creatine transporter deficiency. The cond...
journal_title:Journal of inherited metabolic disease
pub_type: 杂志文章,评审
doi:10.1007/s10545-014-9713-8
更新日期:2014-09-01 00:00:00