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Julia C Espel, Hannah L Palac, Ankit Bharat, Joanne Cullina, Michelle Prickett, Marc Sala, Susanna A McColley, Manu Jain
RATIONALE: The association between CFTR genotype, sweat chloride and mortality has been inconsistent, but no previous analyses have examined the association stratified by individual genotypes. OBJECTIVES: To evaluate the genotype-specific association between sweat chloride and mortality. METHODS: The CFF Patient Registry was assessed and included all patients in the registry between 1996 and 2012 with at least one F508del allele. We excluded patients without a documented genotype or plausible sweat chloride level...
January 2018: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
Laia Masvidal, Susana Igreja, Maria D Ramos, Antoni Alvarez, Javier de Gracia, Anabela Ramalho, Margarida D Amaral, Sara Larriba, Teresa Casals
The major purpose of the present study was to quantify correctly spliced CFTR transcripts in human nasal epithelial cells from cystic fibrosis (CF) patients carrying the splicing mutations c.580-1G>T (712-1G>T) and c.2657+5G>A (2789+5G>A) and to assess the applicability of this model in CFTR therapeutic approaches. We performed the relative quantification of CFTR mRNA by reverse transcription quantitative PCR (RT-qPCR) of these splicing mutations in four groups (wild type, CF-F508del controls, CF patients and CF carriers) of individuals...
June 2014: European Journal of Human Genetics: EJHG
Mutaz Sultan, Steven Werlin, Narayanan Venkatasubramani
AIMS: The causes of chronic (CP) and recurrent acute pancreatitis (RAP) in children include anatomic abnormalities and hereditary, metabolic, and autoimmune disorders, with a significant proportion of cases being labeled as idiopathic. Genetic pancreatitis (GP) is associated with mutations of cystic fibrosis transmembrane conductor regulator gene (CFTR), cationic trypsinogen (PRSS1) gene, and serine protease inhibitor Kazal type 1 (SPINK1). There literature is sparse regarding the clinical profile of GP in children...
May 2012: Journal of Pediatric Gastroenterology and Nutrition
P Krenková, P Norambuena, A Stambergová, M Macek
Hereby we present evaluation of high-resolution melting for mutation scanning applied to the cystic fibrosis transmembrane conductance regulator gene. High resolution melting was used for mutation scanning of selected samples derived from cystic fibrosis patients with a known cystic fibrosis transmembrane conductance regulator genotype. We tested 19 different disease-causing cystic fibrosis transmembrane conductance regulator mutant genotypes located within six exons of the cystic fibrosis transmembrane conductance regulator gene (4, 7, 10, 11, 14b and 22)...
2009: Folia Biologica (Praha)
Karen M Schwartz, Lisa L Pike-Buchanan, Kasinathan Muralidharan, Joy B Redman, Jean Amos Wilson, Michael Jarvis, M Grace Cura, Victoria M Pratt
The purpose of this work is to define rare variants of cystic fibrosis (CF) that are potential sources of error and can confound molecular genetic testing methods. We performed routine, clinical CF mutation screening using a laboratory-developed test and the oligonucleotide ligation assay reagents from Abbott/Celera. In this report, we describe 11 unique allele drop outs [3849 + 10kb C>T (NM_000492.2:c.3718-2477C>T), V520F (c.1558G>T), 1078delT (c.948delT), A455E (c.1364C>A), R347P (c.1040G>C), 2184delA (c...
May 2009: Journal of Molecular Diagnostics: JMD
Roberto J Aranzamendi, Fanny Breitman, Carolina Asciutto, Norma Delgado, Claudio Castaños
Cystic fibrosis (CF) may present during neonatal period with classic clinic symptoms related to the disease. The severity of the disease is multifactorial, one of the factors depends on the level of activity of the CFTR protein, which is related with the mutation type that affects the patient. An infant is presented who developed recurrent episodes of vomiting, anorexia, weight loss, dehydration and electrolyte abnormalities, such as metabolic alkalosis, hyponatremia, hypokalemia and hypochloremia. CF was diagnosed after the third episode showing an unusual and not very publicized presentation of the disease...
October 2008: Archivos Argentinos de Pediatría
Jesse Montgomery, Carl T Wittwer, Jana O Kent, Luming Zhou
BACKGROUND: Complete gene analysis of the cystic fibrosis transmembrane conductance regulator gene (CFTR) by scanning and/or sequencing is seldom performed because of the cost, time, and labor involved. High-resolution DNA melting analysis is a rapid, closed-tube alternative for gene scanning and genotyping. METHODS: The 27 exons of CFTR were amplified in 37 PCR products under identical conditions. Common variants in 96 blood donors were identified in each exon by high-resolution melting on a LightScanner(R)...
November 2007: Clinical Chemistry
Reza Alibakhshi, Roya Kianishirazi, Jean-Jacques Cassiman, Mahdi Zamani, Harry Cuppens
BACKGROUND: Cystic fibrosis (CF) is the most common inherited disorder in Caucasian populations, with over 1400 mutations identified in the Cystic Fibrosis Transmembrane conductance Regulator (CFTR) gene. Mutations in the CFTR gene may be also causative for CBAVD (Congenital Bilateral Absence of the Vas Deferens). The type and distribution of mutations varies widely between different countries and/or ethnic groups, and is relatively unknown in Iran. We therefore performed a comprehensive analysis of the CFTR gene in Iranian CF patients...
March 2008: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
M J Alonso, D Heine-Suñer, M Calvo, J Rosell, J Giménez, M D Ramos, J J Telleria, A Palacio, X Estivill, T Casals
We analyzed 1,954 Spanish cystic fibrosis (CF) alleles in order to define the molecular spectrum of mutations in the CFTR gene in Spanish CF patients. Commercial panels showed a limited detection power, leading to the identification of only 76% of alleles. Two scanning techniques, denaturing gradient gel electrophoresis (DGGE) and single strand conformation polymorphism/hetroduplex (SSCP/HD), were carried out to detect CFTR sequence changes. In addition, intragenic markers IVS8CA, IVS8-6(T)n and IVS17bTA were also analyzed...
March 2007: Annals of Human Genetics
J Mainz, U Hammer, C Rokahr, A Hubler, F Zintl, M Ballmann
Cystic fibrosis (CF) is a recessive genetic disease caused by defects of the cystic fibrosis trans-membrane regulator (CFTR) gene with a median survival of less than 35 years. This work reports on the oldest living German siblings with CF. Besides clinical history, CF genotype and nasal potential difference (NPD) measurement results, the remarkably high exercise activity of the siblings is discussed as a disease-modifying factor. Both male patients have an overall mild pulmonary manifestation. They have suffered from abdominal symptoms since their early childhood, including recurrent pancreatitis and diffuse symptoms leading to partial gastric resection...
2006: Respiration; International Review of Thoracic Diseases
Sainan Wei, Gerald L Feldman, Kristin G Monaghan
PURPOSE: Limited data regarding the cystic fibrosis carrier frequency and mutation detection rate is available for Arab-Americans. We retrospectively determined the frequency of carriers among Arab-Americans undergoing preconception and prenatal carrier screening in our laboratories. METHODS: Between October, 2001 and June, 2005, we performed carrier screening on 805 Arab-Americans, testing for at least the original 25 mutations recommended by the American College of Medical Genetics...
April 2006: Genetics in Medicine: Official Journal of the American College of Medical Genetics
I Duguépéroux, M De Braekeleer
Most cystic fibrosis (CF) transmembrane receptor mutations are rare. The French CF Registry offers an opportunity to study the genotype-phenotype relationship of these rare alleles. Since 1992, 39 CF patients carrying one copy of the 3849+10kbC->T mutation and 88 the 2789+5G->A allele have been seen at least once in a CF care centre. Among them, 16 carrying the 3849+10kbC->T/Delta F508 genotype and 34 with the 2789+5G->A/Delta F508 genotype were seen in 2000. Their age at diagnosis, sweat chloride concentration, anthropometric and lung function results, and clinical aspects were compared with those homozygous for the Delta F508 mutation matched for sex, age and CF care centre...
March 2005: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Danijela Radivojevic, Marina Djurisic, Tanja Lalic, Marija Guc-Scekic, Jovan Savic, Predrag Minic, Thalia Antoniadi, Maria Tzetis, Emmanuel Kanavakis
We have screened 175 patients for molecular defects in the cystic fibrosis transmembrane conductance regulator (CFTR) gene using nondenaturing polyacrylamide gel electrophoresis (PAGE), denaturing gradient gel electrophoresis (DGGE), and sequencing. Six different mutations (F508del, G542X, 621+1G --> T, 2789+5G --> A, R1070Q, and S466X) accounted for 79.71% of CF alleles, with the F508del mutation showing a frequency of 72.28%. Another 12 mutations (R334W, 2184insA, I507del, 1525-1G --> A, E585X, R75X, M1I, 457TAT --> G, 574delA, 2723delTT, A120T, and 2907delTT) covered an additional 3...
2004: Genetic Testing
Charles M Strom, Beryl Crossley, Joy B Redman, Arlene Buller, Franklin Quan, Mei Peng, Matthew McGinnis, Weimin Sun
PURPOSE: To examine the data from > 335,000 Cystic fibrosis (CF) tests to detect unsuspected findings and obtain clinical data when indicated to optimize genetic counseling. METHODS: A proprietary database containing 335,204 consecutive CF DNA tests and 445 CF prenatal diagnostic tests was queried. Clinical information was obtained for prenatal and selected nonprenatal cases by telephone contact with physician offices. RESULTS: The mutation 1078delT was found in much lower frequency than expected with rates of only 1:55,867 tests and 0...
May 2004: Genetics in Medicine: Official Journal of the American College of Medical Genetics
Gerardo Luzardo, Isabel Aznarez, Beatriz Crispino, Adriana Mimbacas, Liria Martínez, Rossana Poggio, Julian Zielenski, Lap-Chee Tsui, Horacio Cardoso
We conducted clinical and genetic analyses of 52 cystic fibrosis (CF) patients in Uruguay, which is about half of the known affected individuals in the country. A relatively high proportion had a mild presentation, characterized by pancreatic sufficiency (28%), a strong pulmonary component (97%), and borderline sweat electrolyte measurements (25%). Mutational analysis of CF chromosomes demonstrated a relatively low incidence of the DeltaF508 allele (40%) and a large number of other cystic fibrosis conductance regulator mutations, with an overall detection rate of about 71%...
2002: Genetics and Molecular Research: GMR
L Frulloni, C Castellani, P Bovo, B Vaona, B Calore, C Liani, G Mastella, G Cavallini
BACKGROUND: An increased incidence of CFTR mutations has recently been reported in chronic and idiopathic pancreatitis. AIM: The aim of the study was to verify these data and describe the clinical, morphological and histological findings in 99 patients (59 males, 40 females, mean age 40+/-16 years), 45 suffering from idiopathic chronic pancreatitis and 54 from acute recurrent pancreatitis. METHODS: Each subject was screened for the 18 CFTR mutations: DF508, DI507, R1162X, 2183AA>G, 21303K, 3849+10KbC>T, G542X, 1717-1G>A, R553X, Q552X, G85E, 711+5G>A, 3132delTG, 2789+5G>A, W1282X, R117H, R347P, R352Q), which cover 72% of cystic fibrosis chromosomes in the Italian population, plus the 5-thymidine allele in intron 8 of the CFTR gene (IVS85T)...
March 2003: Digestive and Liver Disease
Edward F McKone, Scott S Emerson, Karen L Edwards, Moira L Aitken
BACKGROUND: Over 1000 mutations of the cystic fibrosis transmembrane conductance regulator gene (CFTR) that cause cystic fibrosis have been identified. We examined the effect of CFTR genotype on mortality and disease phenotype. METHODS: Using the US Cystic Fibrosis Foundation National Registry, we did a retrospective cohort study to compare standardised mortality rates for the 11 most common genotypes heterozygous for DeltaF508 with those homozygous for DeltaF508...
May 17, 2003: Lancet
E Kanavakis, A Efthymiadou, S Strofalis, S Doudounakis, J Traeger-Synodinos, M Tzetis
Cystic fibrosis (CF) mutation analysis on 437 CF patients, characterized 80 different mutations (20 so far specific to our population) accounting for 91% of CF genes and generating 103 different genotypes. Eight mutations were common [F508del (53.4%), 621+1G>T (5.7%), G542X (3.9%), N1303K (2.6%), 2789+5G>A (1.7%), 2183AA>G (1.4%), E822X (1.4%), R1158X (1%)], 12 showed frequencies between 0.5% and 1%, while the remaining (60) were very rare (1 to 3 alleles). Denaturing gradient gel electrophoresis (DGGE) screening of 12 exons (3, 4, 7, 10, 11, 13, 14b, 16, 17b 20 and 21) detected 85...
May 2003: Clinical Genetics
R Padoan, S Genoni, E Moretti, M Seia, A Giunta, C Corbetta
UNLABELLED: A study was performed on the delayed diagnosis of cystic fibrosis (CF) in infants who had false-negative results in a neonatal screening programme. The genetic and clinical features of false-negative infants in this screening programme were assessed together with the efficiency of the screening procedure in the Lombardia region. In total, 774,687 newborns were screened using a two-step immunoreactive trypsinogen (IRT) (in the years 1990-1992), IRT/IRT + delF508 (1993-1998) or IRT/IRT + polymerase chain reaction (PCR) and oligonucleotide ligation assay (OLA) protocol (1998-1999)...
2002: Acta Paediatrica
M A Gómez-Llorente, A Suarez, C Gómez-Llorente, A Muñoz, M Arauzo, A Antunez, M Navarro, A Gil, J A Gómez-Capilla
We carried out a molecular analysis of 350 chromosomes from 55 families originating from the South of Spain (Andalucia) who were diagnosed with cystic fibrosis (CF). We used polymerase chain reaction, followed by an oligonucleotide ligation assay (OLA) and sequence-coded separation using capillary electrophoresis. A frequency of 43.5% for DeltaF508 was found, making it the most common CF mutation in our sample. Seven more mutations (G542X, R334W, R1162X, 2789+5G-->A, R117H, DeltaI507 and W1282X) were detected and accounted for 24...
November 2001: Early Human Development
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