Abstract:
:Despite the clinical importance of human aneuploidy, we know little of the causes of mammalian non-disjunction. In part, this reflects the fact that, unlike lower organisms, segregation 'impaired' chromosomes are virtually non-existent in mammals. To address this issue, we have studied the mouse Y chromosome on the BALB/cWt ('Wt') inbred background, a system in which loss of the Y chromosome in gonadal tissue has been linked to hermaphroditism. Our results indicate that the Wt Y chromosome is stably transmitted during meiotic cell divisions, but non-disjoins at an extremely high frequency in mitosis. Surprisingly, the non-disjunction events are largely restricted to the earliest cleavage divisions, indicating that there is a temporal 'window' during which the Wt Y chromosome is susceptible to non-disjunction. The non-disjunction phenotype has both cis and trans components: the Wt Y chromosome malsegregates on a variety of genetic backgrounds, demonstrating an intrinsic defect; however, the incidence of non-disjunction is significantly influenced by strain background, indicating the existence of modifying loci and thus providing evidence for a genetic effect on mammalian non-disjunction. These studies suggest that the earliest cell divisions in mammals are non-disjunction-prone, an interpretation which provides an explanation for the high rate of chromosome mosaicism observed in studies of in vitro fertilization (IVF)-derived human preimplantation embryos. Further, our observations raise the possibility that the IVF setting adversely affects chromosome segregation and suggest that genetic quality be an important consideration in any attempt to improve or modify in vitro procedures for use on human eggs and embryos.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Bean CJ,Hunt PA,Millie EA,Hassold TJdoi
10.1093/hmg/10.9.963subject
Has Abstractpub_date
2001-04-15 00:00:00pages
963-72issue
9eissn
0964-6906issn
1460-2083journal_volume
10pub_type
杂志文章abstract::The mammalian Sonic hedgehog (Shh) signalling pathway is essential for embryonic development and the patterning of multiple organs. Disruption or activation of Shh signalling leads to multiple birth defects, including holoprosencephaly, neural tube defects and polydactyly, and in adults results in tumours of the skin ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddp075
更新日期:2009-05-15 00:00:00
abstract::Choroideremia (CHM) is an X-linked progressive eye disorder which results from defects in the human Rab escort protein-1 (REP-1) gene. A gene targeting approach was used to disrupt the mouse chm/rep-1 gene. Chimeric males transmitted the mutated gene to their carrier daughters but, surprisingly, these heterozygous fem...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/6.6.851
更新日期:1997-06-01 00:00:00
abstract::Metabolic control of phenylalanine concentrations in body fluids is essential for cognitive development and executive function. The hepatic phenylalanine hydroxylating system is regulated by the ratio of l-phenylalanine, which is substrate of phenylalanine hydroxylase (PAH), to the PAH cofactor tetrahydrobiopterin (BH...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy079
更新日期:2018-05-15 00:00:00
abstract::Spinocerebellar ataxia 2 (SCA2) is an autosomal dominant neurodegenerative disorder that results from the expansion of a cryptic CAG repeat within the exon 1 of the SCA2 gene. The CAG repeat in normal individuals varies in length from 14 to 31 repeats and is frequently interrupted by one or more CAA triplets, whereas ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/10.21.2437
更新日期:2001-10-01 00:00:00
abstract::Angelman syndrome (AS) is a neurodevelopmental disorder caused due to deletions or loss-of-function mutations in maternally inherited UBE3A. Ube3a functions as an ubiquitin ligase as well as a transcriptional coactivator of steroid hormone receptors. However, the mechanisms by which maternal Ube3a deficiency gives ris...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddr614
更新日期:2012-04-15 00:00:00
abstract::Genome-wide association studies of colorectal cancer (CRC) have identified a number of common variants associated with modest risk, including rs3802842 at chromosome 11q23.1. Several genes map to this region but rs3802842 does not map to any known transcribed or regulatory sequences. We reasoned, therefore, that rs380...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddt584
更新日期:2014-04-15 00:00:00
abstract::Amelogenesis imperfecta (AI) describes a broad group of clinically and genetically heterogeneous inherited defects of dental enamel bio-mineralization. Despite identification of a number of genetic mutations underlying AI, the precise causal mechanisms have yet to be determined. Using a multi-disciplinary approach, we...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq001
更新日期:2010-04-01 00:00:00
abstract::Splice modulation therapy has shown great clinical promise in Duchenne muscular dystrophy, resulting in the production of dystrophin protein. Despite this, the relationship between restoring dystrophin to established dystrophic muscle and its ability to induce clinically relevant changes in muscle function is poorly u...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddv155
更新日期:2015-08-01 00:00:00
abstract::The near completeness of human chromosome sequences is facilitating accurate characterization and assessment of all classes of genomic variation. Particularly, using the DNA reference sequence as a guide, genome scanning technologies, such as microarray-based comparative genomic hybridization (array CGH) and genome-wi...
journal_title:Human molecular genetics
pub_type: 杂志文章,评审
doi:10.1093/hmg/ddl057
更新日期:2006-04-15 00:00:00
abstract::α-Synuclein and mutant huntingtin are the major constituents of the intracellular aggregates that characterize the pathology of Parkinson's disease (PD) and Huntington's disease (HD), respectively. α-Synuclein is likely to be a major contributor to PD, since overexpression of this protein resulting from genetic tripli...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddr477
更新日期:2012-02-01 00:00:00
abstract::Common sequence variants have recently joined rare structural polymorphisms as genetic factors with strong evidence for association with schizophrenia. Here we extend our previous genome-wide association study and meta-analysis (totalling 7 946 cases and 19 036 controls) by examining an expanded set of variants using ...
journal_title:Human molecular genetics
pub_type: 杂志文章,meta分析
doi:10.1093/hmg/ddr325
更新日期:2011-10-15 00:00:00
abstract::The X-linked reproductive homeobox (RHOX) gene cluster encodes transcription factors preferentially expressed in reproductive tissues. This gene cluster has important roles in male fertility based on phenotypic defects of Rhox-mutant mice and the finding that aberrant RHOX promoter methylation is strongly associated w...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddw313
更新日期:2016-11-15 00:00:00
abstract::A large number of mutations in the gene encoding the catalytic subunit of mitochondrial DNA polymerase γ (POLγA) cause human disease. The Y955C mutation is common and leads to a dominant disease with progressive external ophthalmoplegia and other symptoms. The biochemical effect of the Y955C mutation has been extensiv...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq565
更新日期:2011-03-15 00:00:00
abstract::Focal facial dermal dysplasia (FFDD) Type IV is a rare syndrome characterized by facial lesions resembling aplasia cutis in a preauricular distribution along the line of fusion of the maxillary and mandibular prominences. To identify the causative gene(s), exome sequencing was performed in a family with two affected s...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds477
更新日期:2013-02-15 00:00:00
abstract::A strong association between ERAP1 and ankylosing spondylitis (AS) was recently identified by the Wellcome Trust Case Control Consortium and the Australo-Anglo-American Spondylitis Consortium (WTCCC-TASC) study. ERAP1 is highly polymorphic with strong linkage disequilibrium evident across the gene. We therefore conduc...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddp371
更新日期:2009-11-01 00:00:00
abstract::Beckwith-Wiedemann syndrome (BWS) is an overgrowth malformation syndrome that maps to human chromosome 11p15.5, a region that harbours a number of imprinted genes. We studied the methylation status of H19 and KCNQ1OT1 (LIT1/KvDMR1) in a large series of BWS patients. Different patient groups were identified: group I pa...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/10.5.467
更新日期:2001-03-01 00:00:00
abstract::Motivated by the overwhelming success of genome-wide association studies, droves of researchers are working vigorously to exchange and to combine genetic data to expediently discover genetic risk factors for common human traits. The primary tools that fuel these new efforts are imputation, allowing researchers who hav...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddn288
更新日期:2008-10-15 00:00:00
abstract::Selenoprotein N (SelN) deficiency causes a group of inherited neuromuscular disorders termed SEPN1-related myopathies (SEPN1-RM). Although the function of SelN remains unknown, recent data demonstrated that it is dispensable for mouse embryogenesis and suggested its involvement in the regulation of ryanodine receptors...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq515
更新日期:2011-02-15 00:00:00
abstract::Tyrosine hydroxylase (TH) catalyzes the conversion of L-tyrosine to L-dihydroxyphenylalanine (L-DOPA), the rate-limiting step in the biosynthesis of dopamine. Recently, we described a point mutation in hTH (Q381K) in a family of two siblings suffering from progressive L-DOPA-responsive dystonia (DRD), representing the...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/4.7.1209
更新日期:1995-07-01 00:00:00
abstract::Huntington disease is caused by the expansion of a CAG repeat encoding an extended glutamine tract in a protein called huntingtin. Here, we provide evidence supporting the hypothesis that somatic increases of mutation length play a role in the progressive nature and cell-selective aspects of HD pathogenesis. Results f...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddm054
更新日期:2007-05-15 00:00:00
abstract::Hearing loss is the most common sensory deficit in humans. We show that a point mutation in DCDC2 (DCDC2a), a member of doublecortin domain-containing protein superfamily, causes non-syndromic recessive deafness DFNB66 in a Tunisian family. Using immunofluorescence on rat inner ear neuroepithelia, DCDC2a was found to ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddv009
更新日期:2015-05-01 00:00:00
abstract::Mutations in PARK8, encoding leucine-rich repeat kinase 2 (LRRK2), are a frequent cause of Parkinson's disease (PD). Nonetheless, the physiological role of LRRK2 remains unclear. Here, we demonstrate that LRRK2 participates in canonical Wnt signaling as a scaffold. LRRK2 interacts with key Wnt signaling proteins of th...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds342
更新日期:2012-11-15 00:00:00
abstract::Leptomeningeal glioneuronal heterotopia (LGH) is a focal malformation of the cerebral cortex and frequently found in patients with thanatophoric dysplasia (TD). The pathophysiological mechanisms underlying LGH formation are still largely unclear because of difficulties in obtaining brain samples from human TD patients...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy014
更新日期:2018-03-15 00:00:00
abstract::Aminoacyl-tRNA synthetases (ARSs) are ubiquitously expressed enzymes implicated in several dominant and recessive disease phenotypes. The canonical function of ARSs is to couple an amino acid to a cognate transfer RNA (tRNA). We identified three novel disease-associated missense mutations in the alanyl-tRNA synthetase...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy290
更新日期:2018-12-01 00:00:00
abstract::Eiken syndrome is a rare autosomal recessive skeletal dysplasia. We identified a truncation mutation in the C-terminal cytoplasmic tail of the parathyroid hormone (PTH)/PTH-related peptide (PTHrP) type 1 receptor (PTHR1) gene as the cause of this syndrome. Eiken syndrome differs from Jansen and Blomstrand chondrodyspl...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddi001
更新日期:2005-01-01 00:00:00
abstract::Germline mutations in the RB1 gene confer hereditary predisposition to retinoblastoma. The majority of these mutations occur de novo and differ from one patient to another. Cytogenetics and Southern blotting were shown to detect less than 15% of constitutional rearrangements. In this study we used the polymerase chain...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/2.7.975
更新日期:1993-07-01 00:00:00
abstract::Familial exudative vitreoretinopathy (FEVR) belongs to a group of genetically and clinically heterogeneous disorders in retinal vascular development. To date, in approximately 50% of patients with FEVR, pathogenic mutations have been detected in FZD4, LRP5, TSPAN12, NDP and ZNF408. In this study, we identified two het...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddw041
更新日期:2016-04-15 00:00:00
abstract::Machado-Joseph disease (MJD) is a fatal, dominant neurodegenerative disorder. MJD results from polyglutamine repeat expansion in the MJD-1 gene, conferring a toxic gain of function to the ataxin-3 protein. In this study, we aimed at overexpressing ataxin-3 in the rat brain using lentiviral vectors (LV), to generate an...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddn106
更新日期:2008-07-15 00:00:00
abstract::Mutations in RP2 cause the second most frequent form of X-linked retinitis pigmentosa, a severe retinal degeneration that leads to loss of visual acuity and blindness. The RP2 gene encodes a protein with homology to cofactor C, a tubulin-folding chaperone. By searching protein sequence databases, we identified a whole...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/10.11.1177
更新日期:2001-05-15 00:00:00
abstract::We examined the imprinting status of the insulin-like growth factor II gene (IGF2) in a series of 20 human breast disease samples to determine if disrupted imprinting (as evidenced by biallelic expression), was a demonstrable mechanism of altered gene expression. These samples included benign (n = 7) and malignant bre...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/5.8.1123
更新日期:1996-08-01 00:00:00