Abstract:
:Huntington's disease (HD) is an autosomal dominant condition with almost complete penetrance. The age of onset of the symptoms, however, is variable and depends on the parental origin of the gene. A high proportion of early onset cases inherit the HD gene from their father, whereas a considerable proportion of late onset cases inherit the gene from their mother. Modification of the HD gene by maternally inherited extrachromosomal factors has been invoked to account for the parental origin effect. Recent experimental evidence suggests genomic imprinting as an alternative mechanism, by which the gene itself becomes modified in a different way depending on whether it is passed through the maternal or the paternal germline. This modification may involve methylation of DNA and could result in earlier or higher level expression of the gene when it is transmitted by the father.
journal_name
J Med Genetjournal_title
Journal of medical geneticsauthors
Reik Wdoi
10.1136/jmg.25.12.805subject
Has Abstractpub_date
1988-12-01 00:00:00pages
805-8issue
12eissn
0022-2593issn
1468-6244journal_volume
25pub_type
杂志文章abstract::Evidence for linkage has been sought, in four pedigrees with Crouzon syndrome, between polymorphic markers known to be linked to the Saethre-Chotzen locus on 7p and another form of autosomal dominant craniosynostosis on 5q. The data we present exclude Crouzon syndrome as an allelic variant at either of these known cra...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.31.3.219
更新日期:1994-03-01 00:00:00
abstract::Costovertebral dysplasia comprises multiple malformations of the vertebrae and ribs, with a characteristic clinical picture of short trunk dwarfism, short neck, scoliosis, and rib cage deformity. We describe two sibs with the syndrome who are presumed to represent the autosomal recessive form of the disorder. One sib ...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.20.6.441
更新日期:1983-12-01 00:00:00
abstract::HLA and Gm typing were carried out in 16 families. Seven families included 10 sib pairs with rheumatoid arthritis (RA) and autoimmune thyroid disease (ATD) respectively, and nine families included 16 sib pairs with RA and circulating thyroid autoantibodies respectively. Eight, 11, and seven sib pairs with either RA or...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.22.6.451
更新日期:1985-12-01 00:00:00
abstract::It is well known that subjects homozygous for a rare silent allele of ADA may experience a severe combined immunodeficiency. By analogy we have investigated the possible relationship of normal ADA polymorphism with some situations, such as reproductive defects and fetomaternal interactions, in which immunological mech...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.18.5.331
更新日期:1981-10-01 00:00:00
abstract::Rett syndrome (RS; MIM 312750) is a severe neurological disorder affecting exclusively females. Its prevalence is about 1 in 10,000 female births, and it is a prominent cause of profound mental handicap in women. RS is caused by mutations in the X-linked methyl CpG-binding protein 2 (MECP2) gene. These mutations were ...
journal_title:Journal of medical genetics
pub_type: 杂志文章,评审
doi:10.1136/jmg.2007.049452
更新日期:2007-07-01 00:00:00
abstract::Four studies reported an increasing incidence of pyloric stenosis during the late 1970s from geographically diverse areas of the United Kingdom. It was suggested that the increased incidence might be related to changes in infant feeding practices. We used data from the Metropolitan Atlanta Congenital Defects Program, ...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.24.8.482
更新日期:1987-08-01 00:00:00
abstract::A malformed female infant is described. In addition to cardiac, renal, and skeletal (rib) anomalies, severe intrauterine growth retardation and distinct facial dysmorphism were present. The question is raised whether this child represents a new syndrome. ...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.30.6.525
更新日期:1993-06-01 00:00:00
abstract:BACKGROUND:The apolipoprotein E (ApoE) polymorphism has been well studied in the adult human population, in part because the e4 allele is a known risk factor for Alzheimer's disease. Little is known of the distribution of ApoE alleles in newborns, and their association with perinatal brain damage has not been investiga...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.2005.033936
更新日期:2006-05-01 00:00:00
abstract:BACKGROUND:Autosomal recessive hereditary spastic paraplegias (AR-HSP) constitute a heterogeneous group of neurodegenerative diseases involving pyramidal tracts dysfunction. The genes responsible for many types of AR-HSPs remain unknown. We attempted to identify the gene responsible for AR-HSP with optic atrophy and ne...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmedgenet-2012-101212
更新日期:2012-12-01 00:00:00
abstract::A panel of five multiallelic and highly informative dinucleotide CA repeat markers flanking the APC gene was used for presymptomatic diagnosis of familial adenomatous polyposis coli (FAP). Marker regions were amplified by PCR. DNA fragments were separated by electrophoresis in denaturing polyacrylamide gels and visual...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.31.6.442
更新日期:1994-06-01 00:00:00
abstract::Recent studies have shown that the G-allele of MDM2 SNP309 (T/G) in the p53 tumour suppressor pathway can accelerate tumorigenesis and alter the risk of various cancers in women and not in men. In this report, data are presented from two independent groups of patients that suggest that the G-allele of SNP309 accelerat...
journal_title:Journal of medical genetics
pub_type: 信件
doi:10.1136/jmg.2006.043539
更新日期:2006-12-01 00:00:00
abstract::Eighty-six women fulfilling specific selection criteria were studied for germline mutations in two breast cancer susceptibility genes, BRCA1 and BRCA2, using the protein truncation test (PTT). Nine germline mutations were identified, six in BRCA1 and three in BRCA2. Of the six BRCA1 mutations, three have previously be...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.34.12.990
更新日期:1997-12-01 00:00:00
abstract::The macrophage resistance gene NRAMP1 regulates priming/activation of macrophages for enhanced TNF alpha, IL 1 beta, and MHC class II expression. Since all of these functions are of potential importance in the induction or maintenance or both of autoimmune disease, samples from the Arthritis and Rheumatism Council's r...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.33.8.672
更新日期:1996-08-01 00:00:00
abstract::True isochromosomes for Xp probably do not exist in a liveborn. We describe a rare case of complete Xp duplication and retention of the inactivation centre at Xq13. Cytogenetically, it is described as a nonmosaic 46,X,psu idic(X)(q13). Complete duplication of Xpter-->Xq13 was confirmed by banded analysis and FISH prob...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.33.3.237
更新日期:1996-03-01 00:00:00
abstract:BACKGROUND:Autistic spectrum disorders (ASDs) with developmental delay and seizures are a genetically heterogeneous group of diseases caused by at least 700 different genes. Still, a number of cases remain genetically undiagnosed. OBJECTIVE:The objective of this study was to identify and characterise pathogenic varian...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmedgenet-2018-105927
更新日期:2020-02-01 00:00:00
abstract:BACKGROUND:Inherited disorders of fibrinogen are rare and affect either the quantity (hypofibrinogenaemia and afibrinogenaemia) or the quality of the circulating fibrinogen (dysfibrinogenaemia). Extensive allelic heterogeneity has been found for all three disorders: in congenital afibrinogenaemia >30 mutations, the maj...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.2005.033530
更新日期:2005-09-01 00:00:00
abstract::There is significant evidence for genetic and phenotypic heterogeneity in X linked retinitis pigmentosa (XLRP). We have studied the linkage of XLRP in four Irish families to a number of polymorphic DNA markers. We report linkage between the DXS7 (L1.28) locus and the XLRP locus (Z = 3.445, theta = 0.00). Combined with...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.25.4.222
更新日期:1988-04-01 00:00:00
abstract:BACKGROUND:Graves' disease is a female preponderant autoimmune illness and the contribution of the X chromosome to its risk has long been appreciated. However, no X-linked susceptibility loci have been indentified from recent genome-wide association studies (GWAS). METHODS:We re-examined the X chromosome data from our...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmedgenet-2013-101595
更新日期:2013-07-01 00:00:00
abstract::A 7 year old girl is described with congenital hypoplastic anaemia (Diamond-Blackfan anaemia, DBA) and an apparently balanced reciprocal translocation, 46,XX,t(X;19)(p21;q13). The girl has associated features including short stature, unilateral kidney hypoplasia, and a branchial cyst. Fluorescent in situ hybridisation...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.34.9.779
更新日期:1997-09-01 00:00:00
abstract:BACKGROUND:In total, 43 patients having short stature syndrome in 37 Yakut families with autosomal recessive prenatal and postnatal nonprogressive growth failure and facial dysmorphism but with normal intelligence have been identified. METHODS:Because Yakuts are considered as a population isolate and the disease is ra...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.2007.051979
更新日期:2007-12-01 00:00:00
abstract::A family is described in which 16 individuals in 3 generations have Charcot-Marie-Tooth disease. At least 6 family members also have the naevoid basal cell carcinoma syndrome. In addition, 1 subject with both disorders has 2 young daughters with the naevoid basal cell carcinoma syndrome. ...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.15.4.288
更新日期:1978-08-01 00:00:00
abstract::Two half sibs with bilateral complete cleft lip and complete cleft of the palate associated with ectrodactyly of the hands and feet, born to the same phenotypically normal mother, are reported. The younger of the two sibs also has dominantly inherited tremors (also referred to as essential heredofamilial tremors) as d...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.18.5.394
更新日期:1981-10-01 00:00:00
abstract:BACKGROUND:Retinitis pigmentosa (RP) is the most common form of inherited retinal dystrophy, with a worldwide prevalence of 1 in 4000 persons. While in most cases of RP, the disease is limited to the eye (non-syndromic), over 40 forms of syndromic RP have been described. OBJECTIVES:To identify the genetic basis for sy...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmedgenet-2017-104632
更新日期:2017-09-18 00:00:00
abstract::DNA fingerprinting was performed to verify the pedigree structure of a family under investigation for an unusual case of beta thalassaemia. A higher than expected proportion of hypervariable bands was shared by the proband and his mother, leading to suspicion that the child had been the product of a consanguineous mat...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.25.10.660
更新日期:1988-10-01 00:00:00
abstract::Tuberous sclerosis (TSC) is an autosomal dominant disorder characterised by tumour-like malformations (hamartomas) of the brain, skin, and other organs, often associated with seizures and learning disability. There is genetic heterogeneity with loci for TSC on chromosomes 9q34 (TSC1) and 16p13.3 (TSC2). The recently c...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.35.12.969
更新日期:1998-12-01 00:00:00
abstract:AIM:To determine whether, following predictive genetic testing for familial adenomatous polyposis (FAP), children or adults receiving positive results experience clinically significant levels of anxiety or depression, and whether children receiving positive results experience higher levels of anxiety or depression than...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.38.8.519
更新日期:2001-08-01 00:00:00
abstract::A male infant, partially trisomic for a small segment of chromosomes 6 and 22 resulting from a maternal translocation, is described. Comparison of the phenotypic features of the proband with those noted in partial 6p and partial 22 trisomies revealed some common features found in both chromosome anomalies but especial...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.23.2.185
更新日期:1986-04-01 00:00:00
abstract:BACKGROUND:Biallelic germline mutations in the mismatch repair genes MLH1, MSH2, MSH6 or PMS2 cause a recessive childhood cancer syndrome characterised by early-onset malignancies and signs reminiscent of neurofibromatosis type 1 (NF1). Alluding to the underlying genetic defect, we refer to this syndrome as constitutio...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.2008.064212
更新日期:2009-06-01 00:00:00
abstract::A family of male limited gonadotrophin independent precocious puberty was examined for activating mutation of the LH receptor. A transition of A to G in nucleotide 1733 of the human LH receptor gene was identified in all affected males and in an unaffected carrier female. The mutation was shown by identifying a new re...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.32.7.553
更新日期:1995-07-01 00:00:00
abstract::In this paper the costs and benefits associated with DNA diagnosis of subjects who are at risk of having a child with a monogenic disease and who seek genetic counselling because of their reproductive plans are predicted under various assumptions using a mathematical model. Four monogenic diseases have been considered...
journal_title:Journal of medical genetics
pub_type: 杂志文章
doi:10.1136/jmg.34.9.741
更新日期:1997-09-01 00:00:00