1
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Wright DC, Adayapalam N, Bain N, Bain SM, Brown A, Buzzacott N, Carey L, Cross J, Dun K, Joy C, McCarthy C, Moore S, Murch AR, O'Malley F, Parker E, Watt J, Wilkin H, Fagan K, Pertile MD, Peters GB. Chromosome microarray proficiency testing and analysis of quality metric data trends through an external quality assessment program for Australasian laboratories. Pathology 2016; 48:586-96. [PMID: 27575971 DOI: 10.1016/j.pathol.2016.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 04/19/2016] [Accepted: 05/20/2016] [Indexed: 10/21/2022]
Abstract
Chromosome microarrays are an essential tool for investigation of copy number changes in children with congenital anomalies and intellectual deficit. Attempts to standardise microarray testing have focused on establishing technical and clinical quality criteria, however external quality assessment programs are still needed. We report on a microarray proficiency testing program for Australasian laboratories. Quality metrics evaluated included analytical accuracy, result interpretation, report completeness, and laboratory performance data: sample numbers, success and abnormality rate and reporting times. Between 2009 and 2014 nine samples were dispatched with variable results for analytical accuracy (30-100%), correct interpretation (32-96%), and report completeness (30-92%). Laboratory performance data (2007-2014) showed an overall mean success rate of 99.2% and abnormality rate of 23.6%. Reporting times decreased from >90 days to <30 days for normal results and from >102 days to <35 days for abnormal results. Data trends showed a positive correlation with improvement for all these quality metrics, however only 'report completeness' and reporting times reached statistical significance. Whether the overall improvement in laboratory performance was due to participation in this program, or from accumulated laboratory experience over time, is not clear. Either way, the outcome is likely to assist referring clinicians and improve patient care.
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Affiliation(s)
- D C Wright
- The Children's Hospital at Westmead, Westmead, NSW, Australia.
| | - N Adayapalam
- Royal Brisbane Hospital, Brisbane, Qld, Australia
| | - N Bain
- Hunter Area Pathology, Newcastle, NSW, Australia
| | - S M Bain
- SA Pathology, Adelaide, SA, Australia
| | - A Brown
- Wellington Hospital, Wellington, New Zealand
| | - N Buzzacott
- Western Genome Diagnostics, Perth, WA, Australia
| | - L Carey
- The Children's Hospital at Westmead, Westmead, NSW, Australia
| | - J Cross
- The Children's Hospital at Westmead, Westmead, NSW, Australia
| | - K Dun
- Royal Hobart Hospital, Hobart, Tas, Australia
| | - C Joy
- Mater Hospital, Brisbane, Qld, Australia
| | - C McCarthy
- Queensland Fertility Group, Brisbane, Qld, Australia
| | - S Moore
- SA Pathology, Adelaide, SA, Australia
| | - A R Murch
- Retired, formerly at Pathwest Laboratory Medicine WA, QEII Medical Centre, Nedlands, WA, Australia
| | - F O'Malley
- St Vincents Hospital, Melbourne, Vic, Australia
| | - E Parker
- Canterbury Health Laboratories, Christchurch, New Zealand
| | - J Watt
- Canterbury Health Laboratories, Christchurch, New Zealand
| | - H Wilkin
- Monash Medical Centre, Melbourne, Vic, Australia
| | - K Fagan
- Retired, formerly at Hunter Area Pathology Service, John Hunter Hospital, Newcastle, NSW, Australia
| | - M D Pertile
- Murdoch Children's Research Institute, Melbourne, Vic, Australia
| | - G B Peters
- The Children's Hospital at Westmead, Westmead, NSW, Australia
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Chatron N, Haddad V, Andrieux J, Désir J, Boute O, Dieux A, Baumann C, Drunat S, Gérard M, Bonnet C, Leheup B, Till M, Rossi M, Flori E, Alembik Y, Stewart H, McParland J, Bernardini L, Castelluccio P, Roos L, Tümer Z, Fagan K, Hackett A, Bain N, van Haeringen A, Ruivenkamp C, Benzacken B, Sanlaville D, Edery P, Aboura A, Schluth-Bolard C. Refinement of genotype-phenotype correlation in 18 patients carrying a 1q24q25 deletion. Am J Med Genet A 2015; 167A:1008-17. [PMID: 25728055 DOI: 10.1002/ajmg.a.36856] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 10/07/2014] [Indexed: 11/10/2022]
Abstract
Interstitial deletion 1q24q25 is a rare rearrangement associated with intellectual disability, growth retardation, abnormal extremities and facial dysmorphism. In this study, we describe the largest series reported to date, including 18 patients (4M/14F) aged from 2 days to 67 years and comprising two familial cases. The patients presented with a characteristic phenotype including mild to moderate intellectual disability (100%), intrauterine (92%) and postnatal (94%) growth retardation, microcephaly (77%), short hands and feet (83%), brachydactyly (70%), fifth finger clinodactyly (78%) and facial dysmorphism with a bulbous nose (72%), abnormal ears (67%) and micrognathia (56%). Other findings were abnormal palate (50%), single transverse palmar crease (53%), renal (38%), cardiac (38%), and genital (23%) malformations. The deletions were characterized by chromosome microarray. They were of different sizes (490 kb to 20.95 Mb) localized within chromosome bands 1q23.3-q31.2 (chr1:160797550-192912120, hg19). The 490 kb deletion is the smallest deletion reported to date associated with this phenotype. We delineated three regions that may contribute to the phenotype: a proximal one (chr1:164,501,003-167,022,133), associated with cardiac and renal anomalies, a distal one (chr1:178,514,910-181,269,712) and an intermediate 490 kb region (chr1:171970575-172460683, hg19), deleted in the most of the patients, and containing DNM3, MIR3120 and MIR214 that may play an important role in the phenotype. However, this genetic region seems complex with multiple regions giving rise to the same phenotype.
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Affiliation(s)
- Nicolas Chatron
- Hospices Civils de Lyon, Service de Génétique, Laboratoire de Cytogénétique Constitutionnelle, Bron, France
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3
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Le Fevre AK, Taylor S, Malek NH, Horn D, Carr CW, Abdul-Rahman OA, O'Donnell S, Burgess T, Shaw M, Gecz J, Bain N, Fagan K, Hunter MF. FOXP1 mutations cause intellectual disability and a recognizable phenotype. Am J Med Genet A 2013; 161A:3166-75. [PMID: 24214399 DOI: 10.1002/ajmg.a.36174] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Accepted: 07/15/2013] [Indexed: 12/19/2022]
Abstract
Mutations in FOXP1, located at 3p13, have been reported in patients with global developmental delay (GDD), intellectual disability (ID), and speech defects. Mutations in FOXP2, located at 7q31, are well known to cause developmental speech and language disorders, particularly developmental verbal dyspraxia (DVD). FOXP2 has been shown to work co-operatively with FOXP1 in mouse development. An overlap in FOXP1 and FOXP2 expression, both in the songbird and human fetal brain, has suggested that FOXP1 may also have a role in speech and language disorders. We report on a male child with a 0.19 MB intragenic deletion that is predicted to result in haploinsufficiency of FOXP1. Review of our patient and others reported in the literature reveals an emerging phenotype of GDD/ID with moderate to severe speech delay where expressive speech is most severely affected. DVD appears not to be a distinct feature in this group. Facial features include a broad forehead, downslanting palpebral fissures, a short nose with broad tip, relative or true macrocephaly, a frontal hair upsweep and prominent digit pads. Autistic traits and other behavioral problems are likely to be associated with haploinsufficiency of FOXP1. Congenital malformations may be associated.
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Affiliation(s)
- Anna K Le Fevre
- Hunter Genetics, Newcastle, NSW, Australia; John Hunter Children's Hospital, Newcastle, NSW, Australia
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Affiliation(s)
- K Fagan
- Salisbury District Hospital, Salisbury, Wiltshire, UK.
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Ellaway CJ, Ho G, Bettella E, Knapman A, Collins F, Hackett A, McKenzie F, Darmanian A, Peters GB, Fagan K, Christodoulou J. 14q12 microdeletions excluding FOXG1 give rise to a congenital variant Rett syndrome-like phenotype. Eur J Hum Genet 2012; 21:522-7. [PMID: 22968132 DOI: 10.1038/ejhg.2012.208] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Rett syndrome is a clinically defined neurodevelopmental disorder almost exclusively affecting females. Usually sporadic, Rett syndrome is caused by mutations in the X-linked MECP2 gene in ∼90-95% of classic cases and 40-60% of individuals with atypical Rett syndrome. Mutations in the CDKL5 gene have been associated with the early-onset seizure variant of Rett syndrome and mutations in FOXG1 have been associated with the congenital Rett syndrome variant. We report the clinical features and array CGH findings of three atypical Rett syndrome patients who had severe intellectual impairment, early-onset developmental delay, postnatal microcephaly and hypotonia. In addition, the females had a seizure disorder, agenesis of the corpus callosum and subtle dysmorphism. All three were found to have an interstitial deletion of 14q12. The deleted region in common included the PRKD1 gene but not the FOXG1 gene. Gene expression analysis suggested a decrease in FOXG1 levels in two of the patients. Screening of 32 atypical Rett syndrome patients did not identify any pathogenic mutations in the PRKD1 gene, although a previously reported frameshift mutation affecting FOXG1 (c.256dupC, p.Gln86ProfsX35) was identified in a patient with the congenital Rett syndrome variant. There is phenotypic overlap between congenital Rett syndrome variants with FOXG1 mutations and the clinical presentation of our three patients with this 14q12 microdeletion, not encompassing the FOXG1 gene. We propose that the primary defect in these patients is misregulation of the FOXG1 gene rather than a primary abnormality of PRKD1.
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Affiliation(s)
- Carolyn J Ellaway
- Western Sydney Genetics Program, Children's Hospital at Westmead, Sydney, New South Wales, Australia.
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Ronan A, Fagan K, Christie L, Conroy J, Nowak NJ, Turner G. Familial 4.3 Mb duplication of 21q22 sheds new light on the Down syndrome critical region. BMJ Case Rep 2009; 2009:bcr05.2009.1914. [PMID: 21686961 DOI: 10.1136/bcr.05.2009.1914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
A 4.3 Mb duplication of chromosome 21 bands q22.13-q22.2 was diagnosed by interphase fluorescent in situ hybridisation (FISH) in a 31 week gestational age baby with cystic hygroma and hydrops; the duplication was later found in the mother and in her 8-year-old daughter. All had the facial gestalt of Down syndrome (DS). This is the smallest accurately defined duplication of chromosome 21 reported with a DS phenotype. The duplication encompasses the gene DYRK1 but not DSCR1 or DSCAM. Previous karyotype analysis and telomere screening of the mother, and karyotype analysis and metaphase FISH of a chorionic villus sample, had all failed to reveal the duplication. The findings in this family add to the identification and delineation of a "critical region" for the DS phenotype on chromosome 21.
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Affiliation(s)
- Anne Ronan
- Hunter Genetics Unit, Waratah, New South Wales, Australia
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7
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Irwin D, Helm K, Campbell N, Imamura M, Fagan K, Harral J, Carr M, Young KA, Klemm D, Gebb S, Dempsey EC, West J, Majka S. Neonatal lung side population cells demonstrate endothelial potential and are altered in response to hyperoxia-induced lung simplification. Am J Physiol Lung Cell Mol Physiol 2007; 293:L941-51. [PMID: 17693487 DOI: 10.1152/ajplung.00054.2007] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Lung side population (SP) cells are resident lung precursor cells with both epithelial and mesenchymal potential that are believed to play a role in normal lung development and repair. Neonatal hyperoxic exposure impairs lung development leading to a long-term decrease in gas exchange surfaces. The hypothesis that lung SP cells are altered during impaired lung development has not been studied. To address this issue, we characterized the endothelial potential of neonatal lung SP and subsets of lung SP from neonatal mice following hyperoxic exposure during room air recovery. Lung SP cells were isolated and sorted on the basis of their capacity to efflux Hoechst 33342. The lung SP was further sorted based on expression of Flk-1 and CD45. In vitro, both CD45pos/Flk-1pos and CD45neg/Flk-1pos bind isolectin B4 and incorporate LDL and form networks in matrigel, indicating that these populations have endothelial cell characteristics. Hyperoxic exposure of neonatal mice resulted in subtle changes in vascular and alveolar density on P13, which persisted with room air recovery to P41. During room air recovery, a decrease in lung SP cells was detected in the hyperoxic-exposed group on postnatal day 13 followed by an increase on day 41. Within this group, the lung SP subpopulation of cells expressing CD45 increased on day 21, 41, and 55. Here, we show that lung SP cells demonstrate endothelial potential and that the population distribution changes in number as well as composition following hyperoxic exposure. The hyperoxia-induced changes in lung SP cells may limit their ability to effectively contribute to tissue morphogenesis during room air recovery.
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Affiliation(s)
- D Irwin
- Department of Medicine, Cardiovascular Pulmonary Research Section, University of Colorado Health Sciences Center, Denver, USA
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8
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Ronan A, Fagan K, Christie L, Conroy J, Nowak NJ, Turner G. Familial 4.3 Mb duplication of 21q22 sheds new light on the Down syndrome critical region. J Med Genet 2007; 44:448-51. [PMID: 17237124 PMCID: PMC2598003 DOI: 10.1136/jmg.2006.047373] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Revised: 01/05/2007] [Accepted: 01/08/2007] [Indexed: 11/04/2022]
Abstract
A 4.3 Mb duplication of chromosome 21 bands q22.13-q22.2 was diagnosed by interphase fluorescent in-situ hybridisation (FISH) in a 31-week gestational age baby with cystic hygroma and hydrops; the duplication was later found in the mother and in her 8-year-old daughter by the same method and confirmed by array comparative genomic hybridisation (aCGH). All had the facial gestalt of Down syndrome (DS). This is the smallest accurately defined duplication of chromosome 21 reported with a DS phenotype. The duplication encompasses the gene DYRK1 but not DSCR1 or DSCAM, all of which have previously been implicated in the causation of DS. Previous karyotype analysis and telomere screening of the mother, and karyotype analysis and metaphase FISH of a chorionic villus sample, had all failed to reveal the duplication. The findings in this family add to the identification and delineation of a "critical region" for the DS phenotype on chromosome 21. Cryptic chromosomal abnormalities can be missed on a routine karyotype for investigation of abnormal prenatal ultrasound findings, lending support to the use of aCGH analysis in this setting.
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9
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Maas NMC, Van Vooren S, Hannes F, Van Buggenhout G, Mysliwiec M, Moreau Y, Fagan K, Midro A, Engiz O, Balci S, Parker MJ, Sznajer Y, Devriendt K, Fryns JP, Vermeesch JR. The t(4;8) is mediated by homologous recombination between olfactory receptor gene clusters, but other 4p16 translocations occur at random. Genet Couns 2007; 18:357-365. [PMID: 18286816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The t(4;8)(p16;p23) is the second most common constitutional chromosomal translocation and is caused by an ectopic meiotic recombination between the olfactory receptor gene clusters (ORGC), located on chromosome 4p and 8p. Given that ORGCs are scattered across the genome and make-up about 0.1% of the human genome we reasoned that translocations between 4p16 and other chromosomes might be mediated by ectopic recombination between different ORGC. In 13 patients, we mapped the breakpoints of either a balanced or unbalanced translocation between chromosome 4p16 and different chromosomes. For all four t(4;8) cases, the breakpoints fall within the 4p and 8pter ORGC, confirming that non-allelic homologous recombination (NAHR) between the ORGC is the main mechanism of the t(4;8) formation. For the nine other translocations, the breakpoints on chromosome 4 mapped to different loci, one of them within the ORGC and in two flanking the ORGC. In these three cases, the translocation breakpoint at the reciprocal chromosome did not contain ORGC sequences. We conclude that only the t(4;8) is mediated by NAHR between ORGC.
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Affiliation(s)
- N M C Maas
- Centre for Human-Genetics, University Hospital, Catholic University of Leuven, Leuven, Belgium
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10
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Mattes J, Whitehead B, Liehr T, Wilkinson I, Bear J, Fagan K, Craven P, Bennetts B, Edwards M. Paternal uniparental isodisomy for chromosome 14 with mosaicism for a supernumerary marker chromosome 14. Am J Med Genet A 2007; 143A:2165-71. [PMID: 17702046 DOI: 10.1002/ajmg.a.31896] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Uniparental disomy (UPD) describes the inheritance of two homologous chromosomes from a single parent. Disease phenotypes associated with UPD and chromosomal imprinting, rather than with mutations, include Beckwith-Wiedemann syndrome (paternal UPD11p), Angelman syndrome (paternal UPD15), Prader-Willi syndrome (maternal UPD15), and transient neonatal diabetes (paternal UPD6). Here we report on the first case of paternal uniparental isodisomy of chromosome 14 with a mosaicism for a supernumerary marker chromosome 14. The patient demonstrated a small thorax with a 'coat hanger' shape of the ribs, kyphoscoliosis, hypoplasia of the maxilla and mandible, a broad nasal bridge with anteverted nares, contractures of the wrists with ulnar deviation bilaterally, diastasis recti, and marked muscle hypotonia. Vertical skin creases under the chin and stippled epiphyses of the humeri were features not previously described in patients with paternal UPD14. This case illustrates that as with the finding of an isochromosome, a supernumerary marker chromosome can be an important clue to the presence of UPD14.
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Affiliation(s)
- Joerg Mattes
- Department of Paediatrics, John Hunter Hospital, Newcastle, Australia.
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11
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Rodman DM, Harral J, Wu S, West J, Hoedt-Miller M, Reese KA, Fagan K. The low-voltage-activated calcium channel CAV3.1 controls proliferation of human pulmonary artery myocytes. Chest 2006; 128:581S-582S. [PMID: 16373845 DOI: 10.1378/chest.128.6_suppl.581s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- D M Rodman
- Center for Genetic Lung Disease, University of South Alabama, Mobile, AL, USA
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12
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Gaidos E, Deschenes B, Dundon L, Fagan K, Menviel-Hessler L, Moskovitz N, Workman M. Beyond the principle of plentitude: a review of terrestrial planet habitability. Astrobiology 2005; 5:100-126. [PMID: 15815163 DOI: 10.1089/ast.2005.5.100] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We review recent work that directly or indirectly addresses the habitability of terrestrial (rocky) planets like the Earth. Habitability has been traditionally defined in terms of an orbital semimajor axis within a range known as the habitable zone, but it is also well known that the habitability of Earth is due to many other astrophysical, geological, and geochemical factors. We focus this review on (1) recent refinements to habitable zone calculations; (2) the formation and orbital stability of terrestrial planets; (3) the tempo and mode of geologic activity (e.g., plate tectonics) on terrestrial planets; (4) the delivery of water to terrestrial planets in the habitable zone; and (5) the acquisition and loss of terrestrial planet carbon and nitrogen, elements that constitute important atmospheric gases responsible for habitable conditions on Earth's surface as well as being the building blocks of the biosphere itself. Finally, we consider recent work on evidence for the earliest habitable environments and the appearance of life itself on our planet. Such evidence provides us with an important, if nominal, calibration point for our search for other habitable worlds.
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Affiliation(s)
- E Gaidos
- Department of Geology & Geophysics, University of Hawaii, Honolulu, Hawaii, 96822, USA.
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13
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Tada Y, West J, Fagan K, Rodman DM. 222 GENE EXPRESSION PATTERNS IN THE LUNGS OF DOMINANT NEGATIVE BONE MORPHOGENIC PROTEIN RECEPTOR 2 TRANSGENIC MICE. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl1-222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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14
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Fagan K, Soubjaki V, Donald P, Turner G, Partington M. Fine molecular mapping of the 4p16.3 aneuploidy syndromes in four translocation families. J Med Genet 2000; 37:449-51. [PMID: 10928853 PMCID: PMC1734617 DOI: 10.1136/jmg.37.6.449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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15
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Fagan K, Hepler LK, McMurtry IF, Rodman DM. Effect of nitric oxide on transgene expression in vascular smooth muscle cells. Chest 1998; 114:100S-101S. [PMID: 9676653 DOI: 10.1378/chest.114.1_supplement.100s-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- K Fagan
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Health Sciences Center, Denver, USA
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Smedley D, Hamoudi R, Clark J, Warren W, Abdul-Rauf M, Somers G, Venter D, Fagan K, Cooper C, Shipley J. The t(8;13)(p11;q11-12) rearrangement associated with an atypical myeloproliferative disorder fuses the fibroblast growth factor receptor 1 gene to a novel gene RAMP. Hum Mol Genet 1998; 7:637-42. [PMID: 9499416 DOI: 10.1093/hmg/7.4.637] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A recently described atypical myeloproliferative disorder is invariably associated with reciprocal translocations involving 8p11-12. The most common rearrangement is a t(8;13)(p11;q11-12). Here we determine that this translocation results in the fusion of the fibroblast growth factor receptor 1 gene (FGFR1), a member of the receptor tyrosine kinase family at 8p11, to a novel gene at 13q11-12 designated RAMP . The predicted RAMP protein exhibits strong homology to the product of a recently cloned candidate gene for X-linked mental retardation, DXS6673E . We also provide the first report of a novel, putative metal-binding motif, present as five tandem repeats in both RAMP and DXS6673E. RT-PCR detected only one of the two possible fusion transcripts, encoding a product in which the N-terminal 641 amino acids of RAMP become joined to the tyrosine kinase domain of FGFR1. Receptor tyrosine kinases are not commonly involved in the formation of tumour-specific fusion proteins. However, the previous reports of involvement of receptor tyrosine kinases in fusion proteins in non-Hodgkin's lymphoma, chronic myelomonocytic leukaemia and papillary thyroid carcinoma described similar rearrangements. By analogy with these, we propose that the RAMP-FGFR1 fusion product will contribute to progression of this myeloproliferative disorder by constitutive activation of tyrosine kinase function.
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MESH Headings
- Amino Acid Sequence
- Artificial Gene Fusion
- Base Sequence
- Binding Sites
- Blotting, Southern
- Carrier Proteins/genetics
- Chromosomes, Human, Pair 13
- Chromosomes, Human, Pair 8
- DNA-Binding Proteins
- Fibroblast Growth Factors/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Molecular Sequence Data
- Myeloproliferative Disorders/genetics
- Polymerase Chain Reaction
- Protein-Tyrosine Kinases/genetics
- Receptor Protein-Tyrosine Kinases
- Receptor, Fibroblast Growth Factor, Type 1
- Receptors, Fibroblast Growth Factor/genetics
- Transcription Factors
- Transcription, Genetic
- Translocation, Genetic
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Affiliation(s)
- D Smedley
- Cell Biology and Experimental Pathology Section, Institute of Cancer Research, Haddow Laboratories, Belmont, Surrey SM2 5NG, UK.
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17
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Spencer A, Granter N, Fagan K, Zaunders G, Deveridge S. Collection and analysis of peripheral blood mononuclear cells during haemopoietic recovery following PBSCT for CML: autografting as an in vivo purging manoeuvre? Bone Marrow Transplant 1998; 21:101-3. [PMID: 9486504 DOI: 10.1038/sj.bmt.1701042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A 47-year-old man with a 2-year history of Philadelphia chromosome-positive chronic phase (CP) chronic myeloid leukaemia (CML) underwent autologous PBSCT. During the period of haemopoietic reconstitution he underwent five leucapheretic (LP) harvests yielding a total of 2.6 x 10(6)/kg CD34+ cells. Cytogenetic analyses revealed 94, 83, 83, 96 and 85% Ph negativity respectively for the five harvests. RT-PCR analyses for BCR-ABL performed on randomly picked CFU-GM from the five LP products were negative in all cases. These observations suggest that the majority of harvested cells, including the more primitive clonogenic cells, were BCR-ABL (Ph) negative and presumably were not part of the leukaemic clone. These findings support the notion that autologous PBSCT in CML whilst serving as a therapeutic manoeuvre may also facilitate the collection of non-leukaemic progenitor cells for further transplantation procedures.
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Affiliation(s)
- A Spencer
- Hunter Haematology Unit, Hunter Leukaemia and Lymphoma Research Group, Mater Misericordiae Hospital, Newcastle, NSW, Australia
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18
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Partington MW, Fagan K, Soubjaki V, Turner G. Translocations involving 4p16.3 in three families: deletion causing the Pitt-Rogers-Danks syndrome and duplication resulting in a new overgrowth syndrome. J Med Genet 1997; 34:719-28. [PMID: 9321756 PMCID: PMC1051054 DOI: 10.1136/jmg.34.9.719] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Three families are reported who have a translocation involving 4p16.3. Nine subjects are described with the clinical features of the Pitt-Rogers-Danks (PRD) syndrome confirming pre- and postnatal growth failure, microcephaly, severe mental retardation, seizures, and a distinctive facial appearance; a deletion of 4p16.3 was seen in all eight patients studied with fluorescence in situ hybridisation (FISH). Eleven subjects had a new syndrome with physical overgrowth, heavy facial features, and mild to moderate mental handicap; a duplication of the chromosome region 4p16.3 was found in the four subjects studied. It is suggested that the growth abnormalities in these two families may be explained by a dosage effect of the fibroblast growth factor receptor gene 3 (FGFR3), which is located at 4p16.3, that is, a single dose leads to growth failure and a triple dose to physical overgrowth. We describe the molecular mapping of the translocation breakpoint and define it to within locus D4S43.
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MESH Headings
- Abnormalities, Multiple/genetics
- Adolescent
- Adult
- Child
- Child, Preschool
- Chromosomes, Human, Pair 4
- Diseases in Twins
- Female
- Gene Deletion
- Genetic Markers
- Growth Disorders/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Infant, Newborn
- Intellectual Disability/genetics
- Male
- Middle Aged
- Pedigree
- Pregnancy
- Protein-Tyrosine Kinases
- Receptor, Fibroblast Growth Factor, Type 3
- Receptors, Fibroblast Growth Factor/genetics
- Translocation, Genetic
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19
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Nakahashi Y, Nelson E, Fagan K, Gonzales E, Guillou JL, Cooper DM. Construction of a full-length Ca2+-sensitive adenylyl cyclase/aequorin chimera. J Biol Chem 1997; 272:18093-7. [PMID: 9218441 DOI: 10.1074/jbc.272.29.18093] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Ca2+-sensitive adenylyl cyclases are key integrators of Ca2+ and cAMP signaling. To selectively probe dynamic changes in [Ca2+]i at the plasma membrane where adenylyl cyclases reside, a full-length, Ca2+-inhibitable type VI adenylyl cyclase/aequorin chimera has been constructed by a two-stage polymerase chain reaction method. The expressed adenylyl cyclase/aequorin chimera was appropriately localized to the plasma membrane, as judged by biochemical fractionation and functional analysis. The chimera retained full adenylyl cyclase activity and sensitivity to inhibition by physiological [Ca2+]i elevation. The aequorin portion of the chimeric construct was also capable of measuring changes in [Ca2+] both in vitro and in vivo. When the plasma membrane-tagged aequorin and cytosolic aequorin were compared in their measurement of [Ca2+]i, they showed contrasting sensitivities depending on whether the [Ca2+]i originated from internal stores or capacitative entry. This is the first full-length enzyme-aequorin chimera that retains the full biological properties of both aequorin and a Ca2+-sensitive adenylyl cyclase. This novel chimeric Ca2+ sensor provides the unique ability to directly report the dynamics of [Ca2+]i that regulates this Ca2+-sensitive enzyme under a variety of physiological conditions. Since this chimera is localized to the plasma membrane, it can also be used to assess local changes in [Ca2+]i at the plasma membrane as distinct from global changes in [Ca2+]i within the cytosol.
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Affiliation(s)
- Y Nakahashi
- Department of Pharmacology and Neuroscience Program, University of Colorado Health Sciences Center, Denver, Colorado 80262, USA
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20
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21
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Fagan K, Edwards M. Supernumerary ring chromosome 17 identified by fluorescent in situ hybridization. Am J Med Genet 1997; 69:352-5. [PMID: 9098481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We present a patient with multiple anomalies and severe developmental delay. A small supernumerary ring chromosome was found in 40% of her lymphocyte cells at birth. The origin of the marker chromosome could not be determined by GTG banding, but fluorescent in situ hybridization (FISH) later identified the marker as deriving from chromosome 17.
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Affiliation(s)
- K Fagan
- Cytogenetics Unit, Hunter Area Pathology Service, Newcastle, New South Wales, Australia
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22
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Abstract
We report three cases of velocardiofacial syndrome (VCFS) with anal anomalies who have deletions of the 22q11 region and a further case where the proband has VCFS clinically and her father has an anal anomaly. It is important to consider VCFS in the differential diagnosis of children with anal anomalies and to look for other features of the syndrome, such as asymmetrical crying facies, submucous cleft of the palate, developmental delay, cardiac anomalies, and hypoparathyroidism.
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Affiliation(s)
- S Worthington
- Department of Clinical Genetics, Sydney Children's Hospital, Randwick, NSW, Australia
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23
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Lipson A, Fagan K, Colley A, Colley P, Sholler G, Issacs D, Oates RK. Velo-cardio-facial and partial DiGeorge phenotype in a child with interstitial deletion at 10p13--implications for cytogenetics and molecular biology. Am J Med Genet 1996; 65:304-8. [PMID: 8923940 DOI: 10.1002/(sici)1096-8628(19961111)65:4<304::aid-ajmg11>3.0.co;2-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We report on a female with a interstitial deletion of 10p13 and a phenotype similar to that seen with the 22q deletion syndromes (DiGeorge/velo-cardio-facial). She had a posterior cleft palate, perimembranous ventricular septal defect, dyscoordinate swallowing, T-cell subset abnormalities, small ears, maxillary and mandibular hypoplasia, broad nasal bridge, deficient alae nasi, contractures of fingers and developmental delay. This could indicate homology of some developmental genes at 22q and 10p so that patients with the velocardiofacial phenotype who do not prove to be deleted on 22q are candidates for a 10p deletion.
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Affiliation(s)
- A Lipson
- Department of Clinical Genetics, Royal Alexandra Hospital for Children, Sydney, Australia
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24
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Affiliation(s)
- D M Cooper
- Department of Pharmacology, University of Colorado Health Sciences Center, Denver 80262, U.S.A
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25
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Abstract
We describe a patient with developmental delay, mild dysmorphic features, and monosomy of 7q35. Only one other patient with an interstitial deletion of this band has been previously reported. A review of clinical features of these two children did not show similarities in dysmorphic features. Reports of patients with other 7q interstitial deletions are listed.
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Affiliation(s)
- K Fagan
- Cytogenetics Unit, John Hunter Hospital, NSW, Australia
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26
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Lipson A, Emanuel B, Colley P, Fagan K, Driscoll DA. "CATCH 22" sans cardiac anomaly, thymic hypoplasia, cleft palate, and hypocalcaemia: cAtch 22. A common result of 22q11 deficiency? J Med Genet 1994; 31:741. [PMID: 7815448 PMCID: PMC1050092 DOI: 10.1136/jmg.31.9.741] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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27
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Feinstein RA, Lorich C, Fagan K. 31 PERFORMANCE ENHAHCING METHODS OF SCHOLASTIC ATHLETES. Med Sci Sports Exerc 1994. [DOI: 10.1249/00005768-199405001-00032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Fagan K, Colley P, Partington M. A practical application of fluorescent in situ hybridization to the Wolf-Hirschhorn syndrome. Pediatrics 1994; 93:826-7. [PMID: 8165089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- K Fagan
- Division of Molecular and Cell Biology, John Hunter Hospital, Newcastle, NSW, Australia
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29
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Abstract
A patient with a myeloproliferative disorder is described with an eosinophilia together with T-cell lymphoma. A unique translocation t(8;13)(p11.2;q12) was present in all bone marrow cells examined at presentation. No evidence of this translocation was found in a peripheral blood lymphocyte culture. Chromosome analysis after 9 months revealed this same translocation as well as an extra chromosome 21 in all cells; 4.5% of cells also had an additional chromosome 9. The morphologic diagnosis at this stage was chronic myelomonocytic leukemia. Immunophenotyping 3 months later was consistent with a stem-cell leukemia.
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MESH Headings
- Bone Marrow/pathology
- Cell Transformation, Neoplastic
- Chromosomes, Human, Pair 13
- Chromosomes, Human, Pair 21
- Chromosomes, Human, Pair 8
- Chromosomes, Human, Pair 9
- Eosinophilia/complications
- Genes, src
- Humans
- Immunophenotyping
- Leukemia, Myelomonocytic, Chronic/etiology
- Leukemia, Myelomonocytic, Chronic/genetics
- Leukemia, T-Cell/etiology
- Leukemia, T-Cell/genetics
- Male
- Middle Aged
- Myeloproliferative Disorders/complications
- Neoplastic Stem Cells/pathology
- Preleukemia/genetics
- Translocation, Genetic
- Trisomy
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Affiliation(s)
- K Fagan
- Cytogenetics Laboratory, John Hunter Hospital, Newcastle, New South Wales, Australia
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30
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Lane JD, Pickering CL, Hooper ML, Fagan K, Tyers MB, Emmett-Oglesby MW. Failure of ondansetron to block the discriminative or reinforcing stimulus effects of cocaine in the rat. Drug Alcohol Depend 1992; 30:151-62. [PMID: 1386019 DOI: 10.1016/0376-8716(92)90020-d] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Ondansetron (GR38032F), a serotonin 5HT3 antagonist, is active in numerous behavioral paradigms and neurochemical systems. Since 5HT3 antagonists have been suggested as therapeutic agents for the treatment of drug abuse, the action of ondansetron on cocaine drug discrimination and self-administration paradigms in rats was investigated. Doses of ondansetron (0.001 - 1.0 mg/kg) had no effect on the discriminative stimulus properties of 10 mg/kg cocaine. In contrast SCH23390, a dopamine D1 antagonist known to block cocaine discrimination, acted as previously reported. Ondansetron did not augment the effects of SCH23390, but at higher doses, combinations of ondansetron and SCH23390 produced disruption of lever pressing in the presence of cocaine. Ondansetron (0.001-1.0 mg/kg) had no effect on the self-administration of various doses of cocaine, nor did it have any effect on reacquisition of cocaine self-administration in animals with a history of active administration followed by a period of abstinence. As before, SCH23390, known to block cocaine self-administration, acted as previously reported. Although other 5HT antagonists may prove to be efficacious in cocaine abuse, ondansetron appears unlikely to alter the subjective or rewarding stimulus properties of cocaine.
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Affiliation(s)
- J D Lane
- Department of Pharmacology, Texas College of Osteopathic Medicine, Fort Worth 76107-2690
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31
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Agrez MV, Chua FK, Fagan K, Heath JW, Ferguson NW. A human colon cancer cell line established from collagen matrix cultures transplanted into nude mice. Immunol Cell Biol 1991; 69 ( Pt 3):205-13. [PMID: 1959934 DOI: 10.1038/icb.1991.30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A new human colon cancer cell line (020588) has been derived by means of a combined in vitro matrix-in vivo xenograft technique. The tumour cell line is carcino-embryonic antigen positive, displays a marker chromosome and proliferates in chemically-defined serum-free culture medium. The chemosensitivity pattern for the tumour cell line was similar to that observed for the parent tumour cells. The novel method used to establish this continuous human tumour cell line may have several advantages over standard techniques.
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Affiliation(s)
- M V Agrez
- Faculty of Medicine, University of Newcastle, New South Wales, Australia
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32
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Webb GC, Baker RT, Fagan K, Board PG. Localization of the human UbB polyubiquitin gene to chromosome band 17p11.1-17p12. Am J Hum Genet 1990; 46:308-15. [PMID: 2154095 PMCID: PMC1684968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The chromosomal location of the human ubiquitin genes has been evaluated by in situ hybridization. Because of the conservation of the ubiquitin sequence, coding-region probes cannot distinguish between specific ubiquitin genes and reveal ubiquitin sequences in a number of different chromosomal regions. The major sites of hybridization with a coding-region probe include 17p11.1-p12, 12p24.2-q24.32, and 2q21-q24, with weaker hybridization over 1p3, 1q4, 2q3, and 13q. Hybridization with a probe isolated from the UbB gene intron indicated that this gene is located within the region 17p11.1-17p12. This region showed the strongest hybridization with the coding-region probe and is presumably also the location of the duplicated UbB pseudogene.
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Affiliation(s)
- G C Webb
- Division of Clinical Sciences, John Curtin School of Medical Research, Australian National University, Canberra
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33
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Abstract
Three patients are described with different phenotypes and differing de novo interstitial deletions of the long arm of a chromosome 7. The first patient has a deletion with loss of the proximal 7q11.23 band. Only three other cases have been reported with this particular deletion. Our second case shows mild dysmorphism similar to the other four patients reported with deletion of bands 7q21.12----21.3. Our third patient has a deletion of the 7q22.1----32.2 segment and has many of the phenotypic features of the other reported cases of del 7q22----32. GUSB, the gene for beta-glucuronidase, has been localised to the 7cen----q22 region. Analysis of beta-glucuronidase levels in blood leucocytes of our patients has helped more precisely to assign this gene locus to 7q21.11 or 7q22.1.
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Affiliation(s)
- K Fagan
- Department of Neonatology, Mater Hospital, Waratah, NSW 2298, Australia
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34
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Abstract
A unique case of de novo interstitial deletion of chromosome 4 is described involving loss of band q21. The male newborn had multiple abnormalities including frontal bossing, prominent occiput, low set ears, micrognathia, short sternum, short, broad hands and feet, agenesis of the corpus callosum, and cardiac defects. The phenotypic abnormalities are compared with other reported cases of deletion 4q involving adjacent regions.
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Affiliation(s)
- K Fagan
- Cytogenetics Laboratory, Mater Hospital, Waratah, Australia
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35
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Abstract
We report on the segregation of a cytogenetically non-deleted ring chromosome 11 and café-au-lait spots in a family. This appears to be the largest inherited ring autosome yet reported.
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Affiliation(s)
- K Fagan
- Cytogenetics Laboratory, Mater Hospital, Waratah, N.S.W., Australia
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36
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Abstract
Cytogenetic and coagulation studies have been performed on two patients with different abnormalities of chromosome 8, i.e. del(8p23.1----pter) and dup(8q23.1----qter). Results confirm the existence of a regulatory mechanism for clotting factor VII on chromosome 8 and define its location to the p23.1----p23.2 region.
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Affiliation(s)
- K Fagan
- Cytogenetics Laboratory, Newcastle Mater Misericordiae Hospital, Waratah, N.S.W., Australia
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37
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Fagan K, Pollak JK. The effect of the phenoxyacetic acid herbicides 2,4,5-trichlorophenoxyacetic acid and 2,4-dichlorophenoxyacetic acid as ascertained by direct experimentation. Residue Rev 1984; 92:29-58. [PMID: 6494598 DOI: 10.1007/978-1-4612-5266-5_2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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38
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Abstract
A patient with a deletion of the distal portion of the long arm (q21) of chromosome Y is described clinically and cytogenetically. The proband has a normal male habitus but with azoospermia. The proband was investigated because of infertility. Male relatives were also investigated cytogenetically. The deleted Y chromosome was measured and compared with the normal Y of male family members. The results suggest that no Y euchromatin was lost.
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39
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Manuel A, Cohen G, Cohen M, Fagan K, Grigor W. De novo translocation of chromosomes 14 and 18, resulting in an 18q deletion phenotype. Pathology 1983. [DOI: 10.1016/s0031-3025(16)38243-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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