Abstract：
:Intracytoplasmic sperm injection (ICSI) has been used in combination with testicular sperm extraction to achieve pregnancies in couples with severe male-factor infertility, yet many of the underlying genetic mechanisms remain largely unknown. To investigate nondisjunction in mitotic and meiotic germ cells, we performed three-color FISH to detect numeric chromosome aberrations in testicular tissue samples from infertile men confirmed to have impaired spermatogenesis of unknown cause. FISH was employed to determine the rate of sex-chromosome aneuploidy in germ cells. Nuclei were distinguished as haploid or diploid, respectively. The overall incidence of sex-chromosome aneuploidy in germ cells was found to be significantly higher (P<.00001) in all three abnormal histopathologic patterns (range 39.0%-43.5%) as compared with normal controls (29.1%). The relative ratio of normal to aneuploid nuclei in the diploid cells of patients with impaired spermatogenesis was approximately 1.0, a >300% decrease when compared with the 4.42 ratio detected in patients with normal spermatogenesis. These results provide direct evidence of an increased incidence of sex-chromosome aneuploidy observed in germ cells of men with severely impaired spermatogenesis who might be candidates for ICSI with sperm obtained directly from the testis. The incidence of aneuploidy was significantly greater among the diploid nuclei, which suggests that chromosome instability is a result of altered genetic control during mitotic cell division and proliferation during spermatogenesis.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Huang WJ,Lamb DJ,Kim ED,de Lara J,Lin WW,Lipshultz LI,Bischoff FZdoi
10.1086/302402subject
Has Abstractpub_date
1999-06-01 00:00:00pages
1638-45issue
6eissn
0002-9297issn
1537-6605pii
S0002-9297(07)63665-9journal_volume
64pub_type
杂志文章abstract：:Hereditary fructose intolerance (HFI) is an inborn error of metabolism, inherited as an autosomal recessive disorder and caused by a decrease in the activity of fructose-1-phosphate aldolase (aldolase B) in affected individuals. Investigation of the molecular basis of HFI is reported here by the identification of two ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1990-06-01 00:00:00
abstract：:Sixteen tyrosinemic patients were evaluated in our institution for a possible liver transplantation. All patients showed biochemical and/or radiological evidence of liver dysfunction. Renal involvement was found to be more abnormal than expected. Seven patients have been transplanted, with two patients receiving a com...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1990-08-01 00:00:00
abstract：:Generalized vitiligo is a common autoimmune disorder characterized by the development of white patches of skin and overlying hair due to loss of pigment-forming melanocytes from the involved areas. Family clustering of cases is not uncommon, in a pattern suggestive of multifactorial, polygenic inheritance, and there i...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/375451
更新日期：2003-06-01 00:00:00
abstract：:Height has been used for more than a century as a model by which to understand quantitative genetic variation in humans. We report that the entire genome appears to contribute to its additive genetic variance. We used genotypes and phenotypes of 11,214 sibling pairs from three countries to partition additive genetic v...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/522934
更新日期：2007-11-01 00:00:00
abstract：:Congenital universal muscular hypoplasia has been confused with similar diseases in the past. Evidence presented in this paper distinguishes this disorder from other phenotypically similar ones and indicates that it is inherited as an autosomal recessive disorder. ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1979-09-01 00:00:00
abstract：:Little is known about the genetics of nonsyndromic intellectual disability (NSID). We hypothesized that de novo mutations (DNMs) in synaptic genes explain an important fraction of sporadic NSID cases. In order to investigate this possibility, we sequenced 197 genes encoding glutamate receptors and a large subset of th...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2011.02.001
更新日期：2011-03-11 00:00:00
abstract：:The opportunity raised by recombinant DNA technology to develop a linkage marker panel that spans the human genome requires cost-efficient strategies for its optimal utilization. Questions arise as to whether it is more cost-effective to convert a dimorphic restriction enzyme marker system into a highly polymorphic sy...
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：:Alpha-globin gene cluster haplotypes were determined in Southern African San and negroid populations. Significant differences (P less than .01) between the two groups were found at three of the nine loci in the cluster. The most striking difference, however, was the relatively low level of variation found in the San (...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1988-10-01 00:00:00
abstract：:Mutation scanning and direct DNA sequencing of all 50 exons of ABCR were completed for 150 families segregating recessive Stargardt disease (STGD1). ABCR variations were identified in 173 (57%) disease chromosomes, the majority of which represent missense amino acid substitutions. These ABCR variants were not found in...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302251
更新日期：1999-02-01 00:00:00
abstract：:Timely molecular diagnosis of RB1 mutations enables earlier treatment, lower risk, and better health outcomes for patients with retinoblastoma; empowers families to make informed family-planning decisions; and costs less than conventional surveillance. However, complexity has hindered clinical implementation of molecu...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/345651
更新日期：2003-02-01 00:00:00
abstract：:The Hpa I restriction endonuclease site polymorphism that results in some human beta globin genes being contained in a 13-kilobase (kb) DNA restriction fragment rather than in the usual 7.6-kb fragment has been reported to be in linkage disequilibrium with the beta S mutation. The frequency of the 13-kb fragment among...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1981-01-01 00:00:00
abstract：:Idiopathic scoliosis (IS) is the most common spinal deformity in children, and its etiology is unknown. To refine the search for genes underlying IS susceptibility, we ascertained a new cohort of 52 families and conducted a follow-up study of genomewide scans that produced evidence of linkage and association with 8q12...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/513571
更新日期：2007-05-01 00:00:00
abstract：:Fibroblast growth factor homologous factors (FHFs) are intracellular proteins which regulate voltage-gated sodium (Nav) channels in the brain and other tissues. FHF dysfunction has been linked to neurological disorders including epilepsy. Here, we describe two sibling pairs and three unrelated males who presented in i...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2020.10.017
更新日期：2021-01-07 00:00:00
abstract：:Genetic risks are usually computed under the assumption that genetic parameters, such as the recombination fraction, are known without error. Uncertainty in the estimates of these parameters must translate into uncertainty regarding the risk. To allow for uncertainties in parameter values, one may employ Bayesian tech...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
abstract：:Ehlers-Danlos syndrome (EDS) is a heterogeneous group of connective-tissue disorders characterized by skin fragility, joint laxity, and skeletal deformities. Type V collagen appears to have a causal role in EDS types I and II, which show phenotypic overlap and may sometimes be allelic. Type V collagen can exist as a h...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301948
更新日期：1998-08-01 00:00:00
abstract：:Risk prediction based on genomic profiles has raised a lot of attention recently. However, family history is usually ignored in genetic risk prediction. In this study we proposed a statistical framework for risk prediction given an individual's genotype profile and family history. Genotype information about the relati...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2011.04.001
更新日期：2011-05-13 00:00:00
abstract：:Multiple morphological abnormalities of the sperm flagellum (MMAF) is a severe form of male infertility defined by the presence of a mosaic of anomalies, including short, bent, curled, thick, or absent flagella, resulting from a severe disorganization of the axoneme and of the peri-axonemal structures. Mutations in DN...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2018.07.014
更新日期：2018-09-06 00:00:00
abstract：:Histochemical assay for ornithine transcarbamylase (OTC) activity in fixed frozen hepatic sections from a woman heterozygous for OTC deficiency revealed two populations of hepatocytes: those with normal activity and those with no activity. This observation, in conjunction with data from previous family studies, confir...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1976-07-01 00:00:00
abstract：:Linkage is a phenomenon that correlates the genotypes of loci, rather than the phenotypes of one locus to the genotypes of another. It is therefore necessary to convert the observed trait phenotypes into trait-locus genotypes, which can then be analyzed for coinheritance with marker-locus genotypes. However, if the mo...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302797
更新日期：2000-03-01 00:00:00
abstract：:X inactivation involves initiation, propagation, and maintenance of genetic inactivation. Studies of replication timing in X;autosome translocations have suggested that X inactivation may spread into adjacent autosomal DNA. To examine the inactivation of autosomal material at the molecular level, we assessed the trans...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301922
更新日期：1998-07-01 00:00:00
abstract：:Linkage markers at or close to the genes encoding the three major fibrillar collagens were used to analyze the segregation of these loci in six pedigrees with dominantly inherited Marfan syndrome. Four pedigrees were discordant at one of the Type I collagen loci (COL1A2), and, of these, two were discordant at the othe...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1987-12-01 00:00:00
abstract：:Molecular analysis of the human beta-galactosidase gene revealed six different mutations in 10 of 11 Japanese GM1-gangliosidosis patients. They were the only abnormalities in each allele examined in this study. A 165-nucleotide duplication (positions 1103-1267) was found in two infantile patients, producing an abnorma...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-08-01 00:00:00
abstract：:Studying genomic patterns of human population structure provides important insights into human evolutionary history and the relationship among populations, and it has significant practical implications for disease-gene mapping. Here we describe a principal component (PC)-based approach to studying intracontinental pop...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2009.04.015
更新日期：2009-05-01 00:00:00
abstract：:Recent advances in genome technology have led to mapping and subsequent isolation, by positional cloning, of a number of genes for common and/or complex human diseases. It therefore will be possible to utilize information about a known locus in the search for additional, perhaps less penetrant, genes for a particular ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1997-05-01 00:00:00
abstract：:A girl with a prenatal 46,XY karyotype was born with a completely normal female phenotype, including uterus and histologically normal ovaries. In mice with a similar phenotype, the ablation of M33, an ortholog of Drosophila Polycomb, causes male-to-female sex reversal. The analysis of the human homolog of M33, Chromob...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2009.03.016
更新日期：2009-05-01 00:00:00
abstract：:To better define the nature of FMR1 CGG-repeat expansions, changes in allele sizes for 191 families with fragile X and for 33 families with gray-zone repeats (40-60) were analyzed. Expansion of the fragile X chromosome to the full mutation was seen in 13.4% of offspring from premutation mothers with 56-59 repeats, 20....
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1996-12-01 00:00:00
abstract：:Pelizaeus-Merzbacher disease (PMD) is an X-linked, dysmyelinating disorder of the CNS. Duplications of the proteolipid protein (PLP) gene have been found in a proportion of patients, suggesting that, in addition to coding-region or splice-site mutations, overdosage of the gene can cause PMD. We show that the duplicati...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301933
更新日期：1998-07-01 00:00:00
abstract：:Mitochondrial DNA (mtDNA) polymorphisms were detected using 13 restriction enzymes on the total DNA obtained from blood samples of five Asian populations: Japanese and Ainu of northern Japan, Korean, Negrito (Aeta) of the Philippines, and Vedda of Sri Lanka. Of a total of 28 restriction-enzyme morphs detected, eight h...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1988-08-01 00:00:00
abstract：:The identification of genetic variants implicated in human developmental disorders has been revolutionized by second-generation sequencing combined with international pooling of cases. Here, we describe seven individuals who have diverse yet overlapping developmental anomalies, and who all have de novo missense FBXW11...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2019.07.005
更新日期：2019-09-05 00:00:00
abstract：:Niemann-Pick type II disease is an autosomal recessive disorder characterized by a defect in intracellular trafficking of sterols. We have determined the intron/exon boundaries of eight exons from the conserved 3' portion of NPC1, the gene associated with most cases of the disease. SSCP analyses were designed for thes...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302620
更新日期：1999-11-01 00:00:00
