Abstract：
:To resolve uncertainty concerning the inheritance of the perinatal lethal form of osteogenesis imperfecta (OI type II), we collected family data and radiographs for 71 probands and analyzed the collagens synthesized by dermal fibroblastic cells cultured from 43 of the probands, 19 parental pairs, and single parents of each of four additional probands. In 65 families for which there were complete data on sibship size, there was recurrence of the OI type II phenotype in five families such that six (8.6%) of 70 sibs were affected. In two families with recurrence, the radiographic phenotype was milder than that for the remainder; and one of those families was consanguinous, suggesting autosomal recessive inheritance. In the remaining three families there was no evidence of consanguinity, but in one of them the structure was compatible with gonadal mosaicism in the mother. In studies of collagens synthesized by cells from 43 infants, we identified two probands with separate rearrangements in an allele of one of the genes of type I collagen; but in the rest there were subtle mutations that disrupted the normal triple-helix structure of type I collagen molecules. In two probands we identified de novo mutations; in 16 additional families cells from the parents made only normal collagens, compatible with new mutations in their offsprings. These findings indicate that the OI type II phenotype is biochemically heterogeneous, that the majority result from new dominant mutations in the genes encoding type I collagen, and that some recurrences can be accounted for by gonadal mosaicism in one of the parents.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Byers PH,Tsipouras P,Bonadio JF,Starman BJ,Schwartz RCsubject
Has Abstractpub_date
1988-02-01 00:00:00pages
237-48issue
2eissn
0002-9297issn
1537-6605journal_volume
42pub_type
杂志文章abstract：:Natural selection is a significant force that shapes the architecture of the human genome and introduces diversity across global populations. The question of whether advantageous mutations have arisen in the human genome as a result of single or multiple mutation events remains unanswered except for the fact that ther...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2013.04.021
更新日期：2013-06-06 00:00:00
abstract：:We screened DNA from unrelated individuals for RFLPs in the muscle nicotinic acetylcholine receptor (AcChoR) genes. These RFLP markers can be used for genetic linkage and association studies to test the hypothesis that receptor structure or regulation is involved in the development of myasthenia gravis (MG). The cDNAs...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1989-04-01 00:00:00
abstract：:Argininosuccinate lyase (AS lyase) deficiency is an inborn error of the urea cycle with extensive clinical and genetic heterogeneity. We investigated the biochemical basis of the enzyme defect and the genetic heterogeneity in this disorder using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1986-07-01 00:00:00
abstract：:Genetic loci for X-linked retinitis pigmentosa (XLRP) have been mapped between Xp11.22 and Xp22.13 (RP2, RP3, RP6, and RP15). The RP3 gene, which is responsible for the predominant form of XLRP in most Caucasian populations, has been localized to Xp21.1 by linkage analysis and the map positions of chromosomal deletion...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1996-07-01 00:00:00
abstract：:In the present report, we summarize studies aimed at examining the reliability of chromosome heteromorphisms in analyses of chromosome 21 nondisjunction. We used two cytogenetic approaches--fluorescent in situ hybridization (FISH) to repetitive sequences on 21p and traditional Q-banding--to distinguish chromosome 21 h...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-12-01 00:00:00
abstract：:The dominant cerebellar ataxias (ADCAs) represent a clinically and genetically heterogeneous group of disorders linked by progressive deterioration in balance and coordination. The utility of genetic classification of the ADCAs has been highlighted by the striking variability in clinical phenotype observed within fami...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1997-04-01 00:00:00
abstract：:EXTL3 regulates the biosynthesis of heparan sulfate (HS), important for both skeletal development and hematopoiesis, through the formation of HS proteoglycans (HSPGs). By whole-exome sequencing, we identified homozygous missense mutations c.1382C>T, c.1537C>T, c.1970A>G, and c.2008T>G in EXTL3 in nine affected individ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2017.01.013
更新日期：2017-02-02 00:00:00
abstract：:Disordered mitochondrial metabolism may play an important role in a number of idiopathic neurodegenerative disorders. The question of mitochondrial dysfunction is particularly attractive in the case of idiopathic Parkinson disease (PD), since Vyas et al. recognized in the 1980s that the parkinsonism-inducing compound ...
journal_title：American journal of human genetics
pub_type： 杂志文章,评审
doi：10.1086/301812
更新日期：1998-04-01 00:00:00
abstract：:A single base mutation at nucleotide position 3460 (nt 3460) in the ND1 gene in human mtDNA was found to be associated with Leber hereditary optic neuroretinopathy (LHON). The G-to-A mutation converts an alanine to a threonine at the 52d codon of the gene. The mutation also abolishes an AhaII restriction site and thus...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-06-01 00:00:00
abstract：:Heteroplasmy, the existence of multiple mtDNA types within an individual, has been previously detected by using mostly indirect methods and focusing largely on just the hypervariable segments of the control region. Next-generation sequencing technologies should enable studies of heteroplasmy across the entire mtDNA ge...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2010.07.014
更新日期：2010-08-13 00:00:00
abstract：:Haplotype analysis was conducted on the mutant allele of 14 unrelated subjects heterozygous for a mutation in the codon for amino acid 3500 of human apolipoprotein B100. This mutation is associated with defective binding of low-density lipoprotein to the low-density lipoprotein receptor and with moderate hypercholeste...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1990-10-01 00:00:00
abstract：:Two female identical twins who were clinically normal were obligatory heterozygotes for X-linked deuteranomaly associated with a green-red fusion gene derived from their deuteranomalous father. On anomaloscopy, one of the twins was phenotypically deuteranomalous while the other had normal color vision. The color visio...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-08-01 00:00:00
abstract：:Common variation in over 100 genes has been implicated in the risk of developing asthma, but the contribution of rare variants to asthma susceptibility remains largely unexplored. We selected nine genes that showed the strongest signatures of weak purifying selection from among 53 candidate asthma-associated genes, an...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2012.01.008
更新日期：2012-02-10 00:00:00
abstract：:Prader-Willi syndrome (PWS) and Angelman syndrome (AS) are distinct neurobehavioral disorders that most often arise from a 4-Mb deletion of chromosome 15q11-q13 during paternal or maternal gametogenesis, respectively. At a de novo frequency of approximately.67-1/10,000 births, these deletions represent a common struct...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302510
更新日期：1999-08-01 00:00:00
abstract：:One approach frequently used for identifying genetic factors involved in the process of a complex disease is the comparison of patients and controls for a number of genetic markers near a candidate gene. The analysis of such association studies raises some specific problems because of the fact that genotypic and not g...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-05-01 00:00:00
abstract：:A stepwise logistic-regression procedure is proposed for evaluation of the relative importance of variants at different sites within a small genetic region. By fitting statistical models with main effects, rather than modeling the full haplotype effects, we generate tests, with few degrees of freedom, that are likely ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/338007
更新日期：2002-01-01 00:00:00
abstract：:We have identified a new mutation in mtDNA, involving tRNALeu(CUN) in a patient manifesting an isolated skeletal myopathy. This heteroplasmic A-->G transition at position 12320 affects the T psi C loop at a conserved site and was not found in 120 controls. Analysis of cultured fibroblasts, white blood cells/platelets,...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1997-02-01 00:00:00
abstract：:A novel type IV collagen, alpha 3(IV), has recently been identified in human and bovine basement membranes. Here we describe the cloning and sequencing of a cDNA encoding 218 residues of the NC1 domain of the human alpha 3(IV) chain. Of interest is the possible role of abnormalities of the alpha 3(IV) chain in Alport ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-09-01 00:00:00
abstract：:Prenatal hemoglobinopathy screening was chosen as a model system for the study of patient receptivity to unsolicited genetic information. Providers of prenatal care in Rochester, NY, were offered free testing of all their prenatal patients and genetic counseling of women found positive. The 18,907 prenatal samples tes...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-03-01 00:00:00
abstract：:Cells derived from patients with the cancer-prone inherited disorder ataxia-telangiectasia (A-T) show an abnormal response to ionizing radiation-induced DNA damage, such as an increased cell killing and a diminished inhibition of DNA synthesis. The enhanced killing of A-T (group D) cells by X-rays can be corrected by ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1995-02-01 00:00:00
abstract：:Linkage of Alzheimer disease (AD) to DNA markers on chromosomes 14, 19, and 21 was studied in 10 families in which the disease was apparently inherited as an autosomal dominant trait. Families were derived from a Dutch population-based epidemiologic study of early-onset AD. Although in all probands the onset of AD was...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1994-10-01 00:00:00
abstract：:Many ion channel genes have been associated with human genetic pain disorders. Here we report two large Chinese families with autosomal-dominant episodic pain. We performed a genome-wide linkage scan with microsatellite markers after excluding mutations in three known genes (SCN9A, SCN10A, and TRPA1) that cause simila...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2013.09.016
更新日期：2013-11-07 00:00:00
abstract：:In humans, recombination in the pseudoautosomal region is approximately 10-fold higher in males than in females. This difference is thought to reflect the fact that, in females, there is opportunity for genetic exchange along the entire length of the X chromosome, resulting in a relative reduction in the likelihood of...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-06-01 00:00:00
abstract：:The long-QT syndrome (LQT; Ward-Romano syndrome) is a cardiac disorder that is inherited as an autosomal dominant trait. Affected family members suffer from recurrent syncope and sudden death due to ventricular arrhythmias. Recently, we identified a DNA marker on the short arm of chromosome 11 (the Harvey ras-1 locus ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-12-01 00:00:00
abstract：:Previously, we demonstrated evidence of linkage to bipolar affective disorder (BP) in a single large, multigenerational family with a LOD score of 3.41 at the PFKL locus on chromosome 21q22.3. Additional families showed little support for linkage to PFKL under homogeneity or heterogeneity, in that study. We have expan...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302185
更新日期：1999-01-01 00:00:00
abstract：:Early B cell factor 3 (EBF3) is an atypical transcription factor that is thought to influence the laminar formation of the cerebral cortex. Here, we report that de novo mutations in EBF3 cause a complex neurodevelopmental syndrome. The mutations were identified in two large-scale sequencing projects: the UK Decipherin...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2016.11.020
更新日期：2017-01-05 00:00:00
abstract：:In linkage analysis, when the lod score is maximized over multiple genetic models, standard asymptotic approximation of the significance level does not apply. Monte Carlo methods can be used to estimate the p value, but procedures currently used are extremely inefficient. We propose a Monte Carlo procedure based on th...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-12-01 00:00:00
abstract：:To test hypotheses about the origin of modern humans, we analyzed mtDNA sequences, 30 nuclear restriction-site polymorphisms (RSPs), and 30 tetranucleotide short tandem repeat (STR) polymorphisms in 243 Africans, Asians, and Europeans. An evolutionary tree based on mtDNA displays deep African branches, indicating grea...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1002/ajmg.1320570340
更新日期：1995-09-01 00:00:00
abstract：:A proband, clinically thought to have trisomy 10p, was found to have an inverted duplication of 10p [46, XY, inv dup(10)(qter----p15.3::p15.3----p 11.1:)]. The phenotypic findings and cytogenetic observations were supported by relevant biochemical studies. The activity of phosphofructokinase (platelet-type; PFKP), pre...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1984-07-01 00:00:00
abstract：:Cancer occurrence in 164 families with breast/ovarian cancer and germline BRCA2 mutations was studied to evaluate the evidence for genotype-phenotype correlations. Mutations in a central portion of the gene (the "ovarian cancer cluster region" [OCCR]) were associated with a significantly higher ratio of cases of ovari...
journal_title：American journal of human genetics
pub_type： 杂志文章,多中心研究
doi：10.1086/318181
更新日期：2001-02-01 00:00:00
