Qgenomics Genomics for Human Health
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Understanding Fraser Syndrome
SPECIAL NEEDS // Features Synonyms of Fraser Syndrome • Cryptophthalmos- Syndactyly Syndrome • Cryptophthalmos Syndrome • Cyclopism • Fraser-Francois Syndrome • Meyer-Schwickerath’s Syndrome • Ulrich-Feichtiger Syndrome Understanding Fraser Syndrome A look at how Fraser Syndrome – a rare, non- development of the kidney), skeletal larynx. Lack of kidney function or blockage treatment are often required for those # Ophanet, a consortium of European sex linked genetic disorder – causes anomalies and mental delay. of the larynx is usually the cause of death for surviving Fraser Syndrome-affected children. partners, currently defines a condition rare a wide range of abnormalities, those who are stillborn or die within the first Thanks to advances in genetic counselling when it affects one person per 2,000. particularly vision loss. Associated Symptoms year of infancy. technologies, medical professionals Due to multiple malformations of different 25% of affected infants are stillborn, nowadays find it more effective in carrying * A pattern of inheritance in which both body organs, a child with Fraser Syndrome while 20% die before the age of one out the diagnosis, prenatal treatment and copies of an autosomal gene must be Compilation: Leonard Lau and Yvonne Tan; Photo: stock.xchange is likely to suffer from at least partial visual, year from renal or laryngeal defects. If management of Fraser Syndrome. abnormal for a genetic condition or disease hearing or speech impairment, among other these anomalies are not present, the life Ultrasonographic diagnosis of the to occur. An autosomal gene is a gene A very rare# genetic disorder occurring in Syndrome (the syndrome has a recurrence symptoms. expectancy is almost normal. -
RARE CHROMOSOME DISORDERS the Term, ‘Rare Chromosome Disorders’, Refers to Conditions Which
INFORMATION SHEET Page 1 COMPLEX LEARNING DIFFICULTIES AND DISABILITIES RESEARCH PROJECT (CLDD) RARE CHROMOSOME DISORDERS The term, ‘rare chromosome disorders’, refers to conditions which: 1. occur due to missing, duplicated or re-arranged chromosome material 2. have a low prevalence rate (thus not including chromosomal disorders such as Down syndrome). Chromosomes are structures found in the nuclei of cells in human bodies. Each chromosome contains thousands of genes which determine how we grow and develop. A typically developing person will have 23 pairs of chromosomes with one member of each pair being inherited from each parent, giving a total of 46 individual chromosomes. Two of these are the sex chromosomes which determine whether we are female (XX) or male (XY). The remaining 44 chromosomes are grouped in 22 pairs, numbered 1 to 22. The arms of a chromosome are called ‘p’ (shorter arm) and ‘q’ (long arm) (see Figure 1); these arms are separated into numerical regions, which in turn are divided into bands and sub-bands. p q Figure 1. Diagram of a chromosome Individually, rare chromosome disorders are extremely uncommon, with some being actually unique; however, collectively rare chromosome disorders make up at least one in every 200 live births, with babies either having symptoms from birth or early childhood, or being carriers of a chromosomal abnormality and experiencing the effects when they try to reproduce in later life (Searle and Hultén, 2009). Recent advances in technology and medical expertise has meant that chromosomes can be viewed at ever increasing magnifications, which is resulting in the detection of more complex defects. -
Cryptophthalmos Syndrome: a Case Report
Case Report Cryptophthalmos Syndrome: A Case Report Jawad Bin Yamin Butt, Tariq Mehmood Qureshi, Muhammad Tariq Khan, Anwar-ul-Haq Ahmad Pak J Ophthalmol 2014, Vol. 30 No.3 . .. .. See end of article for A 20 days female baby presented to us in OPD. She was the 4th child of normal authors affiliations parents with 3 normal siblings. She exhibited few features of cryptophthalmos which fit the criteria of Fraser syndrome. …..……………………….. Key words: Cryptophthalmos, Fraser syndrome, Eye lid defect. Correspondence to: Jawad Bin Yamin Butt Layton Benevolent Trust Hospital (LRBT), 436 A/I Township, Lahore …..……………………….. ryptophthalmos (CO) is defined as a set of rare CASE REPORT congenital eyelid defects in which the lid folds The patient is a 20 days old female. She is the 4th child C are unable to divide in the embryo and the of healthy parents. Her three older siblings are normal skin extends continuously from the forehead with no congenital malformation. The infant is full 1-3 onto the cheeks covering the eyes. CO maybe term and delivered by spontaneous vaginal delivery bilateral or unilateral and fluctuates in severity from which was eventless. The baby weighed 2900 grams at the presence of rudimentary, distorted eyelids to birth and exhibits normal feeding manner. complete absence of eyelids2. Autosomal recessive and autosomal dominant inheritance have been reported, Clinical evaluation exhibits complete absence of but most cases are autosomal recessive.4-8 right side eyelid formation with absent eyelashes. The skin is continuous from the forehead to the cheek, CO is of three clinical types: covering the entire globe. -
Fraser Syndrome: Case Report in Lacrimal System Síndrome De Fraser: Relato De Caso Nas Vias Lacrimais
CASE REPORT 123 Fraser Syndrome: case report in lacrimal system Síndrome de Fraser: relato de caso nas vias lacrimais Silvia Helena Tavares Lorena1, Eliana Domingues Gonçalves2, Marco Antônio Campos Machado3, Cláudio Enrique Cuadros Jablinski4, César Augusto Briceño5, João Amaro Ferrari Silva6 ABSTRACT Fraser syndrome is a systemic condition characterized by cryptophthalmos, syndactyly and abnormal genitalia, which may be associated with urinary tract, ear, nose, larynx and skeletal abnormalities. Cryptophthalmos can be an isolated finding (that has been reported as an autosomal dominant trait) or associated with other congenital anomalies (reported as an autosomal recessive disorder). Child, female, nine month of life, evaluated in the lacrimal setor of Federal University of São Paulo. Child of consanguineous parents. Her physical examination showed total unilateral cryptophthalmos (left side), epiphora (right side) with mucopurulent discharge, depressed nasal bridge, low set ears, atresia of the external auditory canal, prominent labia majora and syndactyly of the fingers and toes. Ocular ultrasonography showed brachycephaly, absence of septu pellucidum prominence of the lateral ventricles, a major bone defect in the skull, the presence of thinning of the mantle tissue of the brain,a reduced anterior-posterior ocular diameter, anterior segment disorganization, absence of the lens and total retinal detachment in the left eye. Keywords: Lacrimal duct obstruction/congenital; Dacryocystitis; Syndrome; Case reports RESUMO A síndrome de Fraser é uma condição sistêmica caracterizada por criptoftalmo, sindactilia e anomalia da genitália, podendo se associar com alterações dos rins, do ouvido, do nariz, da laringe e do esqueleto. O criptoftalmo pode representar um achado isolado, representado por herança autossômica dominante, associado a outras anomalias congênitas, relatado como herança autossômica recessiva. -
2016 IES Annual Meeting Final Programme
ROYAL ACADEMY OF MEDICINE IN IRELAND IRISH JOURNAL OF MEDICAL SCIENCE Irish Endocrine Society 40th Annual Meeting 14th and 15th October 2016 Stormont Hotel, Belfast Local Organiser: Doctor Hamish Courtney, REVISEDRoyal Victoria Hospital, PROOF Belfast Irish Journal of Medical Science Volume XXX Supplement X DOI 10.1007/s11845-016-1482-y 123 123 Journal : Large 11845 Dispatch : 17-8-2016 Pages : 57 Article No. : 1482 h LE h TYPESET MS Code : 1482 h44CP h DISK Ir J Med Sci Disclosure statement This supplement is paid for by the Irish Endocrine Society. However the meeting costs are supported by the following commercial sponsors: Abbott Amgen Astra Zeneca Besins Healthcare BMS Boehringer Ingleheim Consilient Ipsen Janssen-Cilag Kyowa Kirin Lilly Menarini Merck Serono MSD Novartis Novo Nordisk Pfizer Sanofi REVISED PROOF 123 Journal : Large 11845 Dispatch : 17-8-2016 Pages : 57 Article No. : 1482 h LE h TYPESET MS Code : 1482 h44CP h DISK Ir J Med Sci Novo Lecture Nordisk Lecture 1976 D.K. O’Donovan 1977 S. Bloom 1978 J.H.S. Robertson 1979 A.G. Cudworth 1980 D.A.D. Montgomery 1981 Peter Watkins 1982 G. Joplin 1983 D.R. London 1984 A.X. Bertagna 1985 Malcolm Nattrass Laurence Kennedy 1986 Brian Frier JB Ferriss 1987 Maurice Scanlon TJ McKenna 1988 D.A. Heath AB Atkinson 1989 J. Ward GH Tomkin 1990 R. Volpe KD Buchanan 1991 Michael Besser PPA Smyth 1992 R.V. Ragontte DH Hadden 1993 Bruce Weintraub David Powell 1994 Oscar Croffard Patrick Bell 1995 Robert Lindsay Brian Sheridan 1996 C.R.W. Edwards Rosemary Freaney 1997 Stephanie Amiel David McCance 1998 Robert Turner Randle Hayes 1999 Ian Hay Sean K Cunningham 2000 Stephen O’Rahilly Michael Cullen 2001 Andre Lacroix Daphne Owens 2002 J. -
Lab 17. Chromosomes and Karyotypes: How Do Two Physically Healthy Parents Produce a Child with Down Syndrome and a Second Child
Lab 17. Chromosomes and Karyotypes: How Do Two Physically Healthy Parents Produce a Child With Down Syndrome and a Second Child With Cri Du Chat Syndrome? Introduction Mendel’s model of inheritance is the basis for modern genetics. This important model can be broken down into four main ideas. First, and foremost, the fundamental unit of inheritance is the gene and alternative versions of a gene (alleles) account for the variation in inheritable characters. Second, an organism inherits two alleles for each character, one from each parent. Third, if the two alleles differ, then one is fully expressed and determines the nature of the specific trait (this version of the gene is called the dominant allele) while the other one has no noticeable effect (this version of the gene is called the recessive allele). Fourth, the two alleles for each character segregate (or separate) during gamete production. Therefore, an egg or a sperm cell only gets one of the two alleles that are present in the somatic cells of the organism. This idea is known as the law of segregation. It was brilliant (or lucky) that Mendel chose plant traits that turned out to have a relatively simple genetic basis. Each trait that he studied is determined by only one gene, and each of these genes only consists of two alleles. These conditions, however, are not met by all inheritable traits. The relationship between traits and genes is not always a simple one. In this investigation, you will use what you know about the relationship between traits and genes to explain how two children from the same family inherited two different genetic disorders. -
(Lcrs) in 22Q11 Mediate Deletions, Duplications, Translocations, and Genomic Instability: an Update and Literature Review Tamim H
review January/February 2001 ⅐ Vol. 3 ⅐ No. 1 Evolutionarily conserved low copy repeats (LCRs) in 22q11 mediate deletions, duplications, translocations, and genomic instability: An update and literature review Tamim H. Shaikh, PhD1, Hiroki Kurahashi, MD, PhD1, and Beverly S. Emanuel, PhD1,2 Several constitutional rearrangements, including deletions, duplications, and translocations, are associated with 22q11.2. These rearrangements give rise to a variety of genomic disorders, including DiGeorge, velocardiofacial, and conotruncal anomaly face syndromes (DGS/VCFS/CAFS), cat eye syndrome (CES), and the supernumerary der(22)t(11;22) syndrome associated with the recurrent t(11;22). Chromosome 22-specific duplications or low copy repeats (LCRs) have been directly implicated in the chromosomal rearrangements associated with 22q11.2. Extensive sequence analysis of the different copies of 22q11 LCRs suggests a complex organization. Examination of their evolutionary origin suggests that the duplications in 22q11.2 may predate the divergence of New World monkeys 40 million years ago. Based on the current data, a number of models are proposed to explain the LCR-mediated constitutional rearrangements of 22q11.2. Genetics in Medicine, 2001:3(1):6–13. Key Words: duplication, evolution, 22q11, deletion and translocation Although chromosome 22 represents only 2% of the haploid The 22q11.2 deletion syndrome, which includes DGS/ human genome,1 recurrent, clinically significant, acquired, VCFS/CAFS, is the most common microdeletion syndrome. and somatic -
Sema4 Noninvasive Prenatal Select
Sema4 Noninvasive Prenatal Select Noninvasive prenatal testing with targeted genome counting 2 Autosomal trisomies 5 Trisomy 21 (Down syndrome) 6 Trisomy 18 (Edwards syndrome) 7 Trisomy 13 (Patau syndrome) 8 Trisomy 16 9 Trisomy 22 9 Trisomy 15 10 Sex chromosome aneuploidies 12 Monosomy X (Turner syndrome) 13 XXX (Trisomy X) 14 XXY (Klinefelter syndrome) 14 XYY 15 Microdeletions 17 22q11.2 deletion 18 1p36 deletion 20 4p16 deletion (Wolf-Hirschhorn syndrome) 20 5p15 deletion (Cri-du-chat syndrome) 22 15q11.2-q13 deletion (Angelman syndrome) 22 15q11.2-q13 deletion (Prader-Willi syndrome) 24 11q23 deletion (Jacobsen Syndrome) 25 8q24 deletion (Langer-Giedion syndrome) 26 Turnaround time 27 Specimen and shipping requirements 27 2 Noninvasive prenatal testing with targeted genome counting Sema4’s Noninvasive Prenatal Testing (NIPT)- Targeted Genome Counting analyzes genetic information of cell-free DNA (cfDNA) through a simple maternal blood draw to determine the risk for common aneuploidies, sex chromosomal abnormalities, and microdeletions, in addition to fetal gender, as early as nine weeks gestation. The test uses paired-end next-generation sequencing technology to provide higher depth across targeted regions. It also uses a laboratory-specific statistical model to help reduce false positive and false negative rates. The test can be offered to all women with singleton, twins and triplet pregnancies, including egg donor. The conditions offered are shown in below tables. For multiple gestation pregnancies, screening of three conditions -
RD-Action Matchmaker – Summary of Disease Expertise Recorded Under
Summary of disease expertise recorded via RD-ACTION Matchmaker under each Thematic Grouping and EURORDIS Members’ Thematic Grouping Thematic Reported expertise of those completing the EURORDIS Member perspectives on Grouping matchmaker under each heading Grouping RD Thematically Rare Bone Achondroplasia/Hypochondroplasia Achondroplasia Amelia skeletal dysplasia’s including Achondroplasia/Growth hormone cleidocranial dysostosis, arthrogryposis deficiency/MPS/Turner Brachydactyly chondrodysplasia punctate Fibrous dysplasia of bone Collagenopathy and oncologic disease such as Fibrodysplasia ossificans progressive Li-Fraumeni syndrome Osteogenesis imperfecta Congenital hand and fore-foot conditions Sterno Costo Clavicular Hyperostosis Disorders of Sex Development Duchenne Muscular Dystrophy Ehlers –Danlos syndrome Fibrodysplasia Ossificans Progressiva Growth disorders Hypoparathyroidism Hypophosphatemic rickets & Nutritional Rickets Hypophosphatasia Jeune’s syndrome Limb reduction defects Madelung disease Metabolic Osteoporosis Multiple Hereditary Exostoses Osteogenesis imperfecta Osteoporosis Paediatric Osteoporosis Paget’s disease Phocomelia Pseudohypoparathyroidism Radial dysplasia Skeletal dysplasia Thanatophoric dwarfism Ulna dysplasia Rare Cancer and Adrenocortical tumours Acute monoblastic leukaemia Tumours Carcinoid tumours Brain tumour Craniopharyngioma Colon cancer, familial nonpolyposis Embryonal tumours of CNS Craniopharyngioma Ependymoma Desmoid disease Epithelial thymic tumours in -
Molecular Delineation of Small Supernumerary Marker
Zhou et al. Molecular Cytogenetics (2020) 13:19 https://doi.org/10.1186/s13039-020-00486-2 RESEARCH Open Access Molecular delineation of small supernumerary marker chromosomes using a single nucleotide polymorphism array Lili Zhou1, Zhaoke Zheng1, Lianpeng Wu2, Chenyang Xu1, Hao Wu1, Xueqin Xu1 and Shaohua Tang1,2* Abstract Background: Defining the phenotype-genotype correlation of small supernumerary marker chromosomes (sSMCs) remains a challenge in prenatal diagnosis. We karyotyped 20,481 amniotic fluid samples from pregnant women and explored the molecular characteristics of sSMCs using a single nucleotide polymorphism (SNP) array. Results: Out of the 20,481 samples, 15 abnormal karyotypes with sSMC were detected (frequency: 0.073%) and the chromosomal origin was successfully identified by SNP array in 14 of them. The origin of sSMCs were mainly acrocentric-derived chromosomes and the Y chromosome. Two cases of sSMC combined with uniparental disomy (UPD) were detected, UPD(1) and UPD(22). More than half of the cases of sSMC involved mosaicism (8/15) and pathogenicity (9/15) in prenatal diagnosis. A higher prevalence of mosaicism for non-acrocentric chromosomes than acrocentric chromosomes was also revealed. One sSMC derived from chromosome 3 with a neocentromere revealed a 24.99-Mb pathogenic gain of the 3q26.31q29 region on the SNP array, which presented as an abnormal ultrasound indicating nasal bone hypoplasia. Conclusion: The clinical phenotypes of sSMCs are variable and so further genetic testing and parental karyotype analysis are needed to confirm the characteristics of sSMCs. The SNP array used here allows a detailed characterisation of the sSMC and establishes a stronger genotype-phenotype correlation, thus allowing detailed genetic counselling for prenatal diagnosis. -
General Contribution
24 Abstracts of 37th Annual Meeting A1 A SCREENING METHOD FOR FRAGILE X MUTATION: DETECTION OF THE CGG REPEAT IN FMR-1 GENE BY PCR WITH BIOTIN-LABELED PRIMER. ..Eiji NANBA, Kousaku OHNO and Kenzo TAKESHITA Division of Child Neurology, Institute of Neurological Sciences, Tot- tori University School of Medicine. Yonago We have developed a new polymerase chain reaction(PCR)-based method for detection of the CGG repeat in FMR-1 gene. No specific product from PCR was detected on the gel with ethidium bromide staining, because 7-deaza-2'-dGTP is necessary for amplification of this repeat. Biotin-labeled primer was used for PCR and the product was transferred to a nylon membrane followed the detection of biotin by Smilight kit. The size of PCR product from normal control were slightly various and around 300bp. No PCR product was detected from 3 fragile X male patients in 2 families diagnosed by cytogenetic examination. This method is useful for genetic screen- ing of male mental retardation patients to exclude the fragile X mutation. A2 DNA ANALYSISFOR FRAGILE X SYNDROME Osamu KOSUDA,Utak00GASA, ~.ideynki INH, a~ji K/NAGIJCltI, and Kazumasa ]tIKIJI (SILL Inc., Tokyo) Fragile X syndrome is X-linked disease having the amplification of (CG6)n repeat sequence in the chromsomeXq27.3. We performed Southern blot analysis using three probes recognized repetitive sequence resion. Normal controle showed 5.2Kb with Eco RI digest and 2.7Kb with Eco RI/Bss ttII digest as the germ tines by the Southern blot analysis. However, three cell lines established fro~ unrelated the patients with fragile X showed the abnormal bands between 5.2 and 7.7Kb with Eco RI digest, and between 2.7 and 7.7Kb with Eco aI/Bss HII digest. -
MECHANISMS in ENDOCRINOLOGY: Novel Genetic Causes of Short Stature
J M Wit and others Genetics of short stature 174:4 R145–R173 Review MECHANISMS IN ENDOCRINOLOGY Novel genetic causes of short stature 1 1 2 2 Jan M Wit , Wilma Oostdijk , Monique Losekoot , Hermine A van Duyvenvoorde , Correspondence Claudia A L Ruivenkamp2 and Sarina G Kant2 should be addressed to J M Wit Departments of 1Paediatrics and 2Clinical Genetics, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, Email The Netherlands [email protected] Abstract The fast technological development, particularly single nucleotide polymorphism array, array-comparative genomic hybridization, and whole exome sequencing, has led to the discovery of many novel genetic causes of growth failure. In this review we discuss a selection of these, according to a diagnostic classification centred on the epiphyseal growth plate. We successively discuss disorders in hormone signalling, paracrine factors, matrix molecules, intracellular pathways, and fundamental cellular processes, followed by chromosomal aberrations including copy number variants (CNVs) and imprinting disorders associated with short stature. Many novel causes of GH deficiency (GHD) as part of combined pituitary hormone deficiency have been uncovered. The most frequent genetic causes of isolated GHD are GH1 and GHRHR defects, but several novel causes have recently been found, such as GHSR, RNPC3, and IFT172 mutations. Besides well-defined causes of GH insensitivity (GHR, STAT5B, IGFALS, IGF1 defects), disorders of NFkB signalling, STAT3 and IGF2 have recently been discovered. Heterozygous IGF1R defects are a relatively frequent cause of prenatal and postnatal growth retardation. TRHA mutations cause a syndromic form of short stature with elevated T3/T4 ratio. Disorders of signalling of various paracrine factors (FGFs, BMPs, WNTs, PTHrP/IHH, and CNP/NPR2) or genetic defects affecting cartilage extracellular matrix usually cause disproportionate short stature.