Abstract:
:Genomic instability is widespread during early embryo development. Aneuploidy, mosaicism, and copy number variants (CNVs) commonly appear in human preimplantation embryos. Both age-dependent meiotic aneuploidy and age-independent mitotic aneuploidy and CNVs occur In human embryos. Telomere attrition, which contributes to genomic instability in somatic cells, also may promote genomic instability in preimplantation embryos. Telomere dynamics during gametogenesis are strikingly dimorphic between females and males. Sperm telomeres lengthen with advancing paternal age, while oocyte telomeres are among the shortest in the body. Spermatogonia express telomerase activity throughout the life of the male, while oocytes and cleavage stage embryos express low or un-measureable levels of telomerase activity. Telomere attrition in oocytes contributes to meiotic dysfunction, including spindle dysmorphologies, reduced synapsis and chiasmata, as well as delayed, arrested and fragmented embryos. Cleavage stage embryos, with such inefficient telomere reconstitution, likely undergo NHEJ, which produces anaphase lag, chromosome bridges, micronuclei, and genomic instability, including mosaicism and CNVs. Cleavage stage embryos reconstitute the short telomeres inherited from their mothers by Alternative Lengthening of Telomeres (ALT), a DNA recombination based method involving RAD 50, MRE 11, Werner and Bloom proteins, as well as telomere sister chromatid exchange. ALT robustly reconstitutes telomeres, but also predisposes to genomic instability.
journal_name
Eur J Med Genetjournal_title
European journal of medical geneticsauthors
Keefe DLdoi
10.1016/j.ejmg.2019.03.002subject
Has Abstractpub_date
2020-02-01 00:00:00pages
103638issue
2eissn
1769-7212issn
1878-0849pii
S1769-7212(19)30058-8journal_volume
63pub_type
杂志文章,评审abstract:BACKGROUND:Pathogenic variants in the BCOR gene have been identified in males with X-linked recessive microphthalmia and in females with X-linked dominant oculofaciocardiodental (OFCD) syndrome. This latter condition has previously been regarded as rare but the increased availability of genetic testing in recent years ...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2019.04.015
更新日期:2020-02-01 00:00:00
abstract:INTRODUCTION:Meeting of the medial eyebrows in the midline (synophrys) may serve as a cutaneous marker lesion for syndromal disorders (e.g. Cornelia de Lange syndrome). CASE PRESENTATION:A 31-year-old man showed supercilia forming a single band of terminal hairs between left and right lateral orbital rim. Medical exam...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2010.02.001
更新日期:2010-07-01 00:00:00
abstract::Ring chromosome 20 (r(20)) syndrome is a rare disease characterized by refractory epilepsy, moderate mental retardation and particular electroencephalographic disorder with non-convulsive status epilepticus. Here, we report a new case of r(20) syndrome in a 12 year old female who presented minimal dysmorphism, general...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2007.07.002
更新日期:2007-11-01 00:00:00
abstract::Osteogenesis imperfecta (OI) is an inherited heterogeneous rare skeletal disorder characterized by increased bone fragility and low bone mass. The disorder mostly segregates in an autosomal dominant manner. However, several rare autosomal recessive and X-linked forms, caused by mutations in 18 different genes, have al...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2020.103954
更新日期:2020-08-01 00:00:00
abstract::Mosaicism involving a normal cell line and an unbalanced autosomal translocation are rare. In this study we present three new cases with such a mosaicism, which were detected by Single Nucleotide Polymorphism (SNP) array analysis in our routine diagnostic setting. These cases were further characterized using Fluoresce...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2011.05.002
更新日期:2011-07-01 00:00:00
abstract::Charcot-Marie-Tooth disease (CMT) is a heterogeneous group of hereditary polyneuropathies. Variants in more than 80 different genes have been associated with the disorder. In recent years, the introduction of next generation sequencing (NGS) techniques have completely changed the genetic diagnostic approach from the a...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2018.04.003
更新日期:2019-01-01 00:00:00
abstract::We report here a 44 years-old patient with late-onset partial lipodystrophy, mental retardation, epilepsy, ichtyosis and glomerulonephritis, carrying a 10 Mb duplication of the chromosome 5q31.3-5q32.1 region detected by array-CGH. ...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2011.01.005
更新日期:2011-05-01 00:00:00
abstract::Primary microcephalies (MCPH) are characterized by microcephaly (HC -2 SD at birth) in the absence of visceral malformations. To date, less than 20 genes have been associated with MCHP, several of which are involved in the formation and function of the centrosome. Here, we report a novel missense variant in the TUBGCP...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2018.12.003
更新日期:2019-12-01 00:00:00
abstract::We report here a child with a ring chromosome 5 (r(5)) associated with facial dysmorphology and multiple congenital abnormalities. Fluorescent in situ hybridization (FISH) using bacterial artificial chromosome (BAC) clones was performed to determine the breakpoints involved in the r(5). The 5p deletion extended from 5...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2011.11.005
更新日期:2012-02-01 00:00:00
abstract::We report a child with a 785kb deletion of the 3p14.1p13 region including the genes FOXP1, EIF4E3, PROK2, GPR27 resulting in speech delay, contractures, hypertonia and blepharophimosis. FOXP1 and FOXP2 are transcription factors containing a polyglutamine tract and a forkhead DNA binding domain. They both play a role i...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2009.03.012
更新日期:2009-03-01 00:00:00
abstract::Boucher Neuhäuser Syndrome (BNS) is a rare clinical syndrome with autosomal recessive inheritance defined by early-onset ataxia, hypogonadism and chorioretinal dystrophy. We present two siblings diagnosed with BNS in late adult life identified with compound heterozygous state of two novel PNPLA6 mutations. Five health...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2016.11.003
更新日期:2017-02-01 00:00:00
abstract::Hereditary spastic paraplegia (HSP) represents a large group of neurological disorders characterized by progressive spasticity of the lower limbs. One subtype of HSP shows an autosomal recessive form of inheritance with thin corpus callosum (ARHSP-TCC), and displays genetic heterogeneity with four known loci. We ident...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2010.10.006
更新日期:2011-01-01 00:00:00
abstract::We report on a patient with mental and growth retardation, bilateral cleft lip and palate, hypertelorism, ptosis, hearing loss and mild epispadias, suggestive of Malpuech syndrome. High-resolution karyotype and microarray-CGH using an oligonucleotide array with 75Kb oligo's were normal, excluding Wolf-Hirschhorn syndr...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2006.10.004
更新日期:2007-03-01 00:00:00
abstract::In addition to Down syndrome, individuals with other constitutional abnormalities of chromosome 21 have an increased risk of developing childhood acute lymphoblastic leukaemia (ALL). Specifically, carriers of the Robertsonian translocation between chromosomes 15 and 21, rob(15;21) (q10; q10)c, have ∼2,700 increased ri...
journal_title:European journal of medical genetics
pub_type: 杂志文章,评审
doi:10.1016/j.ejmg.2016.01.006
更新日期:2016-03-01 00:00:00
abstract::Infantile myofibromatosis (IM) is a rare disorder characterized by the development of benign tumors in the skin, muscle, bone, and viscera. The incidence is 1/150,000 live births and the disease is the most common cause of fibrous tumors in infancy. Cases which lack visceral involvement generally have a more benign co...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2014.08.010
更新日期:2014-11-01 00:00:00
abstract::Evidence has emerged that assisted reproduction technology (ART) may be associated with an increased risk of congenital malformations, low birth weight, and genetic imprinting disorders. The aim of the study was to determine, the prevalence of major malformations in newborns conceived by standard in vitro fertilizatio...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2005.01.019
更新日期:2005-01-01 00:00:00
abstract::Al-Awadi-Raas-Rothschild syndrome (AARRS; OMIM 276820) is a very rare autosomal recessive limb malformation syndrome caused by WNT7A mutations. AARRS is characterized by various degrees of limb aplasia and hypoplasia. Normal intelligence and malformations of urogenital system are frequent findings. Complete loss of WN...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2017.09.005
更新日期:2017-12-01 00:00:00
abstract::Recently a mutation in the SNX10 gene that belongs to the sorting nexin family was identified as a cause of a new subset of human autosomal recessive osteopetrosis. Here, we identified a novel homozygous mutation (c.46C > T, p.Arg16X) in SNX10, in an Iraqi boy from a consanguineous family with a history of infantile o...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2012.10.010
更新日期:2013-01-01 00:00:00
abstract::Split hand/foot malformation (SHFM) or ectrodactyly is a rare congenital disorder affecting limb development characterized by clinical and genetic heterogeneity. SHFM is usually inherited as an autosomal dominant trait with incomplete penetrance. Isolated and syndromic forms are described. The extent of associated mal...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2019.103805
更新日期:2020-04-01 00:00:00
abstract::The aim of this study was to investigate through direct sequencing the insulin receptor (INSR) gene in DNA samples from a migraine affected family previously showing linkage to chromosome 19p13 in an attempt to detect disease associated mutations. Migraine is a common debilitating disorder with a significant genetic c...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2005.01.015
更新日期:2006-01-01 00:00:00
abstract::Congenital diarrhea and enteropathies (CODEs) are a group of monogenic disorders that often present with severe diarrhea in the first weeks of life. Enteric anendocrinosis (EA), an extremely rare cause of CODE, is characterized by a marked reduction of intestinal enteroendocrine cells (EC). EA is associated with reces...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2020.103981
更新日期:2020-09-01 00:00:00
abstract::Muscular dystrophies (MDs) are a heterogeneous group of inherited disorders that are characterized by progressive skeletal muscle weakness and dystrophic changes on muscle biopsy. The broad genetic and clinical heterogeneity of MDs make the accurate diagnosis difficult via conventional approaches. This study investiga...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2020.103845
更新日期:2020-04-01 00:00:00
abstract::We report on a patient with a microdeletion of chromosome region 9q22.32q31.1 including the PTCH1 gene (human homologue of the Drosophila patched 1 gene), review the findings in the reported patients with similar array CGH findings, and highlight the non nevoid basal cell carcinoma/non-Gorlin syndrome findings at an e...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2009.02.002
更新日期:2009-03-01 00:00:00
abstract::Wolf-Hirschhorn Syndrome (WHS) is caused by deletions on chromosome 4p and is clinically well defined. Genotype-phenotype correlations of patients with WHS point to a critical locus to be responsible for the main characteristics of this disorder. Submicroscopic duplications of this region, however, are not known. Here...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2010.02.004
更新日期:2010-05-01 00:00:00
abstract::Moebius syndrome (MBS) is a rare congenital disorder characterized by rhombencephalic mal development, mainly presenting with facial palsy with limited gaze abduction. Most cases are sporadic, possibly caused by a combination of environmental and genetic factors; however, no proven specific associations have been yet ...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2015.05.003
更新日期:2015-06-01 00:00:00
abstract::Snyder-Robinson syndrome (OMIM #309583) is a rare X-linked condition, caused by mutation in the SMS gene (MIM *300105), characterized by a wide spectrum of clinical signs including developmental delay, epilepsy, asthenic habitus, dysmorphism, osteopenia, and renal or genital anomalies. Here we describe two maternal ha...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2020.104097
更新日期:2021-01-01 00:00:00
abstract::Inverted 8p duplication deletions are recurrent chromosomal rearrangements that are mediated through non-allelic homologous recombination (NAHR) between olfactory receptor (OR) gene clusters at 8p23.1. These rearrangements result in a proximal inverted duplication of various extent, a single copy region between the OR...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2008.10.007
更新日期:2009-01-01 00:00:00
abstract::The Genetic Counselling Outcome Scale (GCOS-24) is a 24-item patient reported outcome measure for use in evaluations of genetic counselling and testing services. The aim of this study was to develop a short form of GCOS-24. The study comprised three phases. Phase I: Cognitive interviews were used to explore interpreta...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2018.11.015
更新日期:2019-05-01 00:00:00
abstract::Chromosome 15q duplication syndrome (Dup15q syndrome) is a neurodevelopmental disorder involving copy number gains of the maternal chromosome 15q11.2-q13 region, characterized by intellectual disability, developmental delay, autism spectrum disorder (ASD), and epilepsy. Gastrointestinal (GI) problems in Dup15q syndrom...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2014.12.012
更新日期:2015-03-01 00:00:00
abstract::Currarino Syndrome (CS) is a rare congenital malformation characterized by three major clinical aspects: sacral anomalies, anorectal malformation and presacral mass. In familial settings the disorder is transmitted as autosomal dominant trait, with a wide phenotype variability and low penetrance. The causative gene of...
journal_title:European journal of medical genetics
pub_type: 杂志文章
doi:10.1016/j.ejmg.2013.09.011
更新日期:2013-12-01 00:00:00