Search Results
Results 451 - 500 of 1146
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Longacre Angelika - - 2003
This study is an investigation of the possible role of DNA polymerase (pol) delta with an inactivated exonuclease (exo) in somatic hypermutation (SHM). Analysis of endogenous heavy chain transcripts revealed no difference in mutation frequency and pattern between exo(-/-), exo(+/-) and exo(+/+) mice. The lack of an effect of the ...
Pronina N - - 2003
Characterization of the molecular basis of phenylketonuria (PKU) in Latvia has been accomplished through the analysis of 96 unrelated chromosomes from 50 Latvian PKU patients. Phenylalanine hydroxylase (PAH) gene mutations have been analyzed through a combined approach in which R158Q, R252W, R261Q, G272X, IVS10-11G>A and R408W mutations were first screened ...
Rainis Liat - - 2003
Patients with Down syndrome (DS) frequently develop 2 kinds of clonal megakaryocytosis: a common, congenital, spontaneously resolving, transient myeloproliferative disorder (TMD) and, less commonly, childhood acute megakaryoblastic leukemia (AMKL). Recently, acquired mutations in exon 2 of GATA1, an X-linked gene encoding a transcription factor that promotes megakaryocytic differentiation, were described ...
Dod? Catherine - - 2003
We took advantage of overlapping interstitial deletions at chromosome 8p11-p12 in two individuals with contiguous gene syndromes and defined an interval of roughly 540 kb associated with a dominant form of Kallmann syndrome, KAL2. We establish here that loss-of-function mutations in FGFR1 underlie KAL2 whereas a gain-of-function mutation in FGFR1 ...
Fantes Judy - - 2003
A submicroscopic deletion containing SOX2 was identified at the 3q breakpoint in a child with t(3;11)(q26.3;p11.2) associated with bilateral anophthalmia. Subsequent SOX2 mutation analysis identified de novo truncating mutations of SOX2 in 4 of 35 (11%) individuals with anophthalmia. Both eyes were affected in all cases with an identified mutation.
Takeuchi Fujio - - 2003
OBJECTIVE: The contribution of the A3243G mutation in mitochondria DNA (mtDNA) to diabetes mellitus (DM) in Werner's syndrome (WS) was studied. PATIENTS AND METHOD: DNA samples from peripheral white blood cells (WBCs) originating from 24 Japanese WS patients aged 30-56 were used. For control, 239 subjects aged 15-95 were also ...
Fokstuen Siv - - 2003
Mutations in the forkhead transcription factor gene 2 (FOXL2) were recently reported to cause blepharophimosis-ptosis-epicanthus inversus syndrome (BPES) types I and II. Evidence was provided that BPES type I (eyelid abnormalities and female infertility) is caused by mutations resulting in a truncated FOXL2 protein. In contrast, mutant FOXL2 proteins, either ...
Drenth Joost P H - - 2003
Polycystic liver disease (PCLD, OMIM 174050) is a dominantly inherited condition characterized by the presence of multiple liver cysts of biliary epithelial origin. Fine mapping established linkage to marker D19S581 (Z(max) = 9.65; theta = 0.01) in four large Dutch families with PCLD. We identified a splice-acceptor site mutation (1138-2A-->G) ...
Verhoeven Kristien - - 2003
Charcot-Marie-Tooth type 2B (CMT2B) is clinically characterized by marked distal muscle weakness and wasting and a high frequency of foot ulcers, infections, and amputations of the toes because of recurrent infections. CMT2B maps to chromosome 3q13-q22. We refined the CMT2B locus to a 2.5-cM region and report two missense mutations ...
Hattori Naoki - - 2003
Three genes commonly causing Charcot-Marie-Tooth disease (CMT) encode myelin-related proteins: peripheral myelin protein 22 (PMP22), myelin protein zero (MPZ) and connexin 32 (Cx32). Demyelinating versus axonal phenotypes are major issues in CMT associated with mutations of these genes. We electrophysiologically, pathologically and genetically evaluated demyelinating and axonal features of 205 ...
De Semir David - - 2003
Recent studies have reported successful correction of the most common F508del mutation in cystic fibrosis (CF) airway epithelial cells by small fragment homologous replacement (SFHR). We wished to apply the SFHR methodology to our CF bronchial epithelial cells, of compound heterozygous genotype (F508del/W1282X), in which nucleic acid transfer was previously ...
Stelzer Christiane - - 2003
We report on a 4-year-old boy with the typical phenotype of Grebe dysplasia born to consanguineous parents. The father seems to be unaffected; the mother presents with brachydactyly type C (BdC). PCR amplification and sequencing of the cartilage-derived morphogenetic protein 1 (CDMP1) gene of the parents led to the identification ...
Shultz Leonard D - - 2003
The nature of the wild-type gene product at the mouse ichthyosis (ic) locus has been of great interest because mutations at this locus cause marked abnormalities in nuclear heterochromatin, similar to those observed in Pelger-Huët anomaly (PHA). We recently found that human PHA is caused by mutations in the gene ...
Raskin Salmo - - 2003
Cystic fibrosis (CF) is an autosomal recessive disease caused by at least 1,000 different mutations in the cystic fibrosis transmembrane conductance regulator gene (CFTR). To determine the frequency of 70 common worldwide CFTR mutations in 155 Euro-Brazilian CF patients and in 38 Afro-Brazilian CF patients, we used direct PCR amplification ...
Wiman Asa - - 2003
Erythropoietic protoporphyria (EPP) is an inherited disorder, caused by a partial deficiency of ferrochelatase (FECH), the last enzyme of the heme biosynthetic pathway. The deficiency results in accumulation of protoporphyrin, primarily in erythroid cells, and the major clinical feature is cutaneous photosensitivity. In addition, some patients may develop liver complications. ...
Koizumi Akio - - 2003
Lysinuric protein intolerance (LPI:MIM 222700) is an autosomal recessive disease characterized by defective transport of the dibasic amino acids. We recently reported a local cluster of LPI in the northern part of Japan (Koizumi et al., 2000). Mutational analysis of the LPI patients in this local cluster revealed they were ...
Cmejla R - - 2003
A considerable progress has been made in the last three years in the uncovering of the molecular basis of Diamond-Blackfan anaemia (DBA). Two genetic loci on 19q13.2 and 8p23 chromosomes have been associated with the DBA phenotype, and the ribosomal protein S19 (RP S19) located at 19q has been found ...
Nelis E - - 2002
BACKGROUND: Mutations in the ganglioside-induced differentiation-associated protein 1 gene (GDAP1) were recently shown to be responsible for autosomal recessive (AR) demyelinating Charcot-Marie-Tooth disease (CMT) type 4A (CMT4A) as well as AR axonal CMT with vocal cord paralysis. METHODS: The coding region of GDAP1 was screened for the presence of mutations ...
Srivastava Alok K - - 2002
The Arc-MYL variant is hyperstable and has an earlier transition state than wild type as a consequence of replacing the wild-type salt-bridge triad formed by R31, E36 and R40 with hydrophobic interactions formed by M31, Y36 and L40. Amino acid substitution mutations were constructed at 16 positions in the Arc-MYL ...
Shaffer Wendy A - - 2002
The six mutations, referred to as the Hex mutations, that together have been shown to convert Escherichia coli aspartate aminotransferase (AATase) specificity to be substantially like that of E. coli tyrosine aminotransferase (TATase) are dissected into two groups, (T109S/N297S) and (V39L/K41Y/T47I/N69L). The letters on the left and right of the ...
Tsukaguchi Hiroyasu - - 2002
Mutations in NPHS2, encoding podocin, have been identified in childhood onset focal and segmental glomerulosclerosis (FSGS). The role of NPHS2 in adult disease is less well defined. We studied 30 families with FSGS and apparent autosomal recessive inheritance and 91 individuals with primary FSGS. We screened family members for NPHS2 ...
Lundén Anne - - 2002
Fish-odor syndrome or Trimethylaminuria (OMIM #602079) in humans is an inborn error of metabolism associated with a characteristic fishy body odor due to elevated levels of trimethylamine (TMA) in body fluids. It is caused by loss-of-function mutations in FMO3 encoding flavin-containing mono-oxygenase 3. A fishy off-flavor is occasionally observed in ...
Chen Li-Yuan - - 2002
Glycogen storage disease type Ib (GSD-Ib) is caused by a deficiency in the glucose-6-phosphate transporter (G6PT), a 10 transmembrane domain endoplasmic reticulum protein. To date, 69 G6PT mutations, including 28 missenses and 2 codon deletions, have been identified in GSD-Ib patients. We previously characterized 15 of the missense and one ...
Incorvaia Carlo - - 2002
PURPOSE: To report on the occurrence of frequent episodes of spontaneous subconjunctival hemorrhage (SCH) in patients with the Leu 34 allele of the coagulation factor XIII (FXIII), known to be associated with high hemorrhagic risk. DESIGN: Observational case series. METHODS: Five young adults who had suffered from recurrent idiopathic SCH ...
Vervoort Virginie S - - 2002
Branchio-Oto-Renal (BOR) syndrome is transmitted as an autosomal dominant disorder, affects an estimated 2% of profoundly deaf children, and is caused by mutations in the human EYA1 gene. However, in up to half of the reported cases, EYA1 mutation screening is negative. This finding has been taken as evidence of ...
Nelis Eva - - 2002
Mutations in the myotubularin-related protein 2 gene on chromosome 11q22 are known to cause autosomal recessive Charcot-Marie-Tooth disease with irregularly folded myelin sheaths. We screened the coding region of the myotubularin-related protein 2 gene in a Turkish consanguineous Charcot-Marie-Tooth disease family compatible with linkage to chromosome 11q22. A homozygous cytosine ...
Holmström P - - 2002
The role of the HFE S65C mutation in the development of hepatic iron overload is unknown. The aim of the present study was: (A) to determine the HFE S65C frequency in a Northern European population; and (B) to evaluate whether the presence of the HFE S65C mutation would result in ...
Martin Natalia - - 2002
Mice that are homozygous with respect to the progressive motor neuronopathy (pmn) mutation (chromosome 13) develop a progressive caudio-cranial degeneration of their motor axons from the age of two weeks and die four to six weeks after birth. The mutation is fully penetrant, and expressivity does not depend on the ...
Mekus Frauke - - 2003
Cystic fibrosis (CF) is the most common severe autosomal recessive disease among Caucasians and is caused by lesions within the cystic fibrosis transmembrane conductance regulator ( CFTR) gene. The variability of CF disease severity suggests the effect of modifying factors. Thirty-four highly concordant and highly discordant F508del homozygous sib pairs, ...
Gustavsson Peter - - 2002
Transient erythroblastopenia of childhood (TEC) is a rare condition, which at onset may be difficult to distinguish from Diamond-Blackfan anaemia (DBA). We have previously shown that mutations in the ribosomal protein S19 gene (RPS19) cause DBA. In order to clarify whether TEC and DBA are allelic, we investigated the segregation ...
Dello Strologo Luca - - 2002
Recent developments in the genetics and physiology of cystinuria do not support the traditional classification, which is based on the excretion of cystine and dibasic amino acids in obligate heterozygotes. Mutations of only two genes (SLC3A1 and SLC7A9), identified by the International Cystinuria Consortium (ICC), have been found to be ...
Skinner Judith A - - 2002
The Gnas locus is highly complex and encodes several oppositely imprinted and alternatively spliced transcripts. Gnas itself encodes Gsalpha, which is involved in endocrine function and bone development, but the roles for the other transcripts have not been established. Here we describe a mouse mutation that provides further biological functions ...
Kottaridis Panagiotis D - - 2002
FLT3 mutations, either internal tandem duplications (ITDs) or aspartate residue 835 (D835) point mutations, are present in approximately one third of patients with acute myeloid leukemia (AML) and have been associated with an increased relapse rate. We have studied FLT3 mutations in paired presentation and relapse samples to ascertain the ...
Attie Alan D - - 2002
The Wisconsin hypoalpha mutant (WHAM) chicken has a >90% reduction in plasma HDL due to hypercatabolism by the kidney of lipid-poor apoA-I. The WHAM chickens have a recessive white skin phenotype caused by a single-gene mutation that maps to the chicken Z-chromosome. This corresponds to human 9q31.1, a chromosomal segment ...
Rajpar M Helen - - 2002
Dentine dysplasia type II is an autosomal dominant disorder in which mineralization of the dentine of the primary teeth is abnormal. On the basis of the phenotypic overlap between, and shared chromosomal location with, dentinogenesis imperfecta type II, a second disorder of dentine mineralization, it has been proposed that the ...
Challa P - - 2002
PURPOSE: Investigators have noted that primary open-angle glaucoma (POAG) in West Africa has an earlier age of onset and appears to be more clinically severe than in the United States and Europe. Primary open-angle glaucoma patients with mutations in myocilin have a similar phenotype. Therefore, we investigated the role of ...
Shirohzu Hisao - - 2002
ICF syndrome is a rare autosomal recessive disorder characterized by immunodeficiency, centromeric instability, and facial anomalies. It is caused by mutations in a de novo DNA methyltransferase gene, DNMT3B. We here report the first three Japanese cases of ICF syndrome from two unrelated families. All patients had typical facial dysmorphism ...
Gualandi F - - 2002
GJB2 mutation analysis was performed in 179 unrelated subjects with sporadic or familial hearing loss (HL). Among 57 families, 18 showed a vertical transmission of HL, the disease being present in two or three generations. Besides 155 nonsyndromic cases, 24 patients presenting with extra-auditory clinical signs were included in the ...
Tanji Kurenai - - 2003
We report an unusual case of encephalo-entero-myopathy associated with the A8344G mutation in the tRNA(Lys) gene of mitochondrial DNA (mtDNA). This patient had mitochondrial myopathy, multiple lipomatosis, mild hearing loss, stroke-like episodes, and paralytic ileus, but she lacked the canonical clinical features of MERRF, myoclonus, epilepsy, or ataxia. We conducted ...
Visapää Ilona - - 2002
GRACILE (growth retardation, aminoaciduria, cholestasis, iron overload, lactacidosis, and early death) syndrome is a recessively inherited lethal disease characterized by fetal growth retardation, lactic acidosis, aminoaciduria, cholestasis, and abnormalities in iron metabolism. We previously localized the causative gene to a 1.5-cM region on chromosome 2q33-37. In the present study, we ...
Foureman Polly - - 2002
Canine leukocyte adhesion deficiency (CLAD) is a primary immunodeficiency disease characterized by recurrent bacterial infections in the presence of marked leukocytosis. The disease was 1st described in the mid-1980s in a cross-breed Irish Setter Dog in the United States. It results from a defective beta-2 subunit of heterodimeric leukocyte adhesion ...
Goodman Stephen I - - 2002
Glutaric acidemia type II is a human inborn error of metabolism which can be due to defects in either subunit of electron transfer flavoprotein (ETF) or in ETF:ubiquinone oxidoreductase (ETF:QO), but few disease-causing mutations have been described. The ETF:QO gene is located on 4q33, and contains 13 exons. Primers to ...
Brennan Stephen O - - 2002
The proposita and her sister had chronically elevated liver function test results, and needle biopsy specimens showed scattered eosinophilic inclusions within the hepatocytes. On immunoperoxidase staining, the inclusions reacted strongly with anti-fibrinogen antisera; on electron-microscopic (EM) examination, the material appeared confined to the endoplasmic reticulum (ER) and was densely packed ...
Slaugenhaupt Susan A - - 2002
Mucolipidosis Type IV (MLIV) is a lysosomal storage disorder that is characterized by severe neurologic and ophthalmologic abnormalities. It is a progressive disease that usually presents during the first year of life with mental retardation, corneal opacities, and delayed motor milestones. First described in 1974, MLIV is a rare autosomal ...
Harris S E - - 2002
Premature ovarian failure (POF) affects approximately 1% of women and is known to be caused by sex chromosome abnormalities, iatrogenic agents and autoimmune diseases, but in the majority of cases the cause is unknown. However, several families have been identified as having an inherited predisposition to POF, suggesting a genetic ...
Wallace Daniel F - - 2002
Hemochromatosis is a common disorder characterized by excess iron absorption and accumulation of iron in tissues. Usually hemochromatosis is inherited in an autosomal recessive pattern and is caused by mutations in the HFE gene. Less common non-HFE-related forms of hemochromatosis have been reported and are caused by mutations in the ...
Devalia Vinod - - 2002
We describe a family with autosomal dominant inheritance of increased body iron stores characterized by raised serum ferritin concentration and normal transferrin saturation. Liver biopsy showed iron deposition in Kupffer cells without fibrosis. The clinical features of HFE-related hemochromatosis were absent, as were the Cys282Tyr and His63Asp mutations. Venesection therapy ...
Phatak Pradyumna D - - 2002
Two HFE gene mutations, C282Y and H63D, underlie the vast majority of cases of hereditary hemochromatosis. We performed a cross-sectional primary care-based study to determine the allele frequency of the C282Y and H63D mutations and the penetrance of each of the affected genotypes defined by their presence. Patients had previously ...
Nagano Makoto - - 2002
Cholesteryl ester transfer protein (CETP) deficiency is one of the most important and common causes of hyperalphalipoproteinemia (HALP) in the Japanese. CETP deficiency is thought to be a state of impaired reverse cholesterol transport, which may possibly lead to the development of atherosclerotic cardiovascular disease despite high HDL-cholesterol (HDL-C) levels. ...
Hecht J T - - 2002
Hereditary multiple exostoses (HME), a condition associated with development and growth of bony exostoses at the ends of the long bones, is caused by germline mutations in the EXT genes. EXT1 and EXT2 function as glycosyltransferases that participate in the biosynthesis of heparan sulfate (HS) to modify proteoglycans. HS proteoglycans, ...
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