Abstract：
:Recently, Schork et al. found that two-trait-locus, two-marker-locus (parametric) linkage analysis can provide substantially more linkage information than can standard one-trait-locus, one-marker-locus methods. However, because of the increased burden of computation, Schork et al. do not expect that their approach will be applied in an initial genome scan. Further, the specification of a suitable two-locus segregation model can be crucial. Affected-sibpair tests are computationally simple and do not require an explicit specification of the disease model. In the past, however, these tests mainly have been applied to data with a single marker locus. Here, we consider sib-pair tests that make it possible to analyze simultaneously two marker loci. The power of these tests is investigated for different (epistatic and heterogeneous) two-trait-locus models, each trait locus being linked to one of the marker loci. We compare these tests both with the test that is optimal for a certain model and with the strategy that analyzes each marker locus separately. The results indicate that a straightforward extension of the well-known mean test for two marker loci can be much more powerful than single-marker-locus analysis and that is power is only slightly inferior to the power of the optimal test.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Knapp M,Seuchter SA,Baur MPsubject
Has Abstractpub_date
1994-11-01 00:00:00pages
1030-41issue
5eissn
0002-9297issn
1537-6605journal_volume
55pub_type
杂志文章abstract：:We describe a log-linear method for analysis of case-parent-triad data, based on maximum likelihood with stratification on parental mating type. The method leads to estimates of association parameters, such as relative risks, for a single allele, and also to likelihood ratio chi2 tests (LRTs) of linkage disequilibrium...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301802
更新日期：1998-04-01 00:00:00
abstract：:We tested 519 chromosome 3-specific cosmids for the presence of rare restriction-endonuclease sites in a search for cosmids containing HTF islands. We have identified 49 cosmids (9% of those tested) that contain multiple rare restriction-endonuclease sites. The cosmids were digested with several common cutting restric...
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：:The study of recent natural selection in human populations has important applications to human history and medicine. Positive natural selection drives the increase in beneficial alleles and plays a role in explaining diversity across human populations. By discovering traits subject to positive selection, we can better...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2011.07.025
更新日期：2011-09-09 00:00:00
abstract：:Restriction-fragment-length-polymorphism analysis was used to examine a female who is segregating for Duchenne muscular dystrophy (DMD) and a deletion of the DXS164 region of the X chromosome. The segregating female has no prior family history of DMD, and she has two copies of the DXS164 region in her peripheral blood...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1987-08-01 00:00:00
abstract：:Patients with Joubert syndrome 2 (JBTS2) suffer from a neurological disease manifested by psychomotor retardation, hypotonia, ataxia, nystagmus, and oculomotor apraxia and variably associated with dysmorphism, as well as retinal and renal involvement. Brain MRI results show cerebellar vermis hypoplasia and additional ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2009.12.007
更新日期：2010-01-01 00:00:00
abstract：:At least 40% of families affected with cerebral cavernous malformation have a mutation in Krit1. We previously identified two point mutations in Krit1 leading to changes in amino acids (D137G and Q210E) in two different families. Further RNA analysis reveals that both point mutations actually activate cryptic splice-d...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/340604
更新日期：2002-06-01 00:00:00
abstract：:CHARGE syndrome is a well-established multiple-malformation syndrome with distinctive consensus diagnostic criteria. Characteristic associated anomalies include ocular coloboma, choanal atresia, cranial nerve defects, distinctive external and inner ear abnormalities, hearing loss, cardiovascular malformations, urogeni...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/500273
更新日期：2006-02-01 00:00:00
abstract：:Fibroblasts from a man with a mild form of osteogenesis imperfecta (OI) and from his son with perinatal lethal OI (OI type II) produced normal and abnormal type I procollagen molecules. The abnormal molecules synthesized by both cell strains contained one or two pro alpha 1(I) chains in which the glycine at position 5...
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：:A total of 752 individuals from The Gambia, west Africa who are representative of the major ethnic groups in the capital, Banjul, were serologically typed for HLA-A, -B, and -C antigens. Although all were typically "African" in their antigenic profiles, some marked frequency differences were found between the ethnic g...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-02-01 00:00:00
abstract：:In this paper we present linkage results from the analysis of 18 Utah breast cancer kindreds, for three 17q markers. Four kindreds had LOD scores greater than 1.0 for at least one of the marker loci. One of these kindreds has a LOD score of 6.07 with D17S579, and we believe it to be the most informative 17q family rep...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1993-04-01 00:00:00
abstract：:The hyper-IgE syndrome (HIES) is a rare primary immunodeficiency characterized by recurrent skin abscesses, pneumonia, and highly elevated levels of serum IgE. HIES is now recognized as a multisystem disorder, with nonimmunologic abnormalities of the dentition, bones, and connective tissue. HIES can be transmitted as ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302547
更新日期：1999-09-01 00:00:00
abstract：:Predictive genomic profiling used to produce personalized nutrition and other lifestyle health recommendations is currently offered directly to consumers. By examining previous meta-analyses and HuGE reviews, we assessed the scientific evidence supporting the purported gene-disease associations for genes included in g...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2007.12.020
更新日期：2008-03-01 00:00:00
abstract：:The numbers of progeny born to 355 patients with heritable polyposis of the colon and to 315 related, but normal, subjects, all old enough to have completed their families, are presented, as well as data on 432 subjects still young enough to have more children. Two main indices are used: mean family size ("genetic fit...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1980-09-01 00:00:00
abstract：:We performed a genomewide linkage analysis of six separate measurements of body mass index (BMI) taken over a span of 28 years, from 1971 to 1998, in the Framingham Heart Study. Variance-components linkage analysis was performed on 330 families, using 401 polymorphic markers. The number of individuals with data at eac...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/343822
更新日期：2002-11-01 00:00:00
abstract：:The pheochromocytomas are an important cause of secondary hypertension. Although pheochromocytoma susceptibility may be associated with germline mutations in the tumor-suppressor genes VHL and NF1 and in the proto-oncogene RET, the genetic basis for most cases of nonsyndromic familial pheochromocytoma is unknown. Rece...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/321282
更新日期：2001-07-01 00:00:00
abstract：:To establish the contribution of germline BRCA1 and BRCA2 mutations to familial ovarian cancer, we have analyzed both genes in DNA samples obtained from an affected individual in each of 112 families containing at least two cases of epithelial ovarian cancer. Germline mutations were found in 43% of the families; BRCA1...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302583
更新日期：1999-10-01 00:00:00
abstract：:The debrisoquine/sparteine polymorphism is associated with a clinically important genetic deficiency of oxidative drug metabolism. From 5% to 10% of Caucasians designated as poor metabolizers (PMs) of the debrisoquine/sparteine polymorphism have a severely impaired capacity to metabolize more than 25 therapeutically u...
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：:Dopamine-beta-hydroxylase (D beta H) catalyzes the conversion of dopamine to norepinephrine and is released from sympathetic neurons into the circulation. Plasma-D beta H activity varies widely between individuals, and a subgroup of the population has very low activity levels. Mounting evidence suggests that the DBH s...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/318198
更新日期：2001-02-01 00:00:00
abstract：:The 7-year IQ scores (WISC) of 116 white and 143 black nonmalformed twins of known zygosity and placental type were ascertained from the NINCDS Collaborative Perinatal Project (NCPP). The type of chorion and zygosity had no significant effect on the mean IQ or among-pair variation. In white monozygotic twins, however,...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1978-07-01 00:00:00
abstract：:An autosomal recessive deficiency of acid alpha-glucosidase (GAA), type II glycogenosis, is genetically and clinically heterogeneous. The discovery of an enzyme-inactivating genomic deletion of exon 18 in three unrelated genetic compound patients--two infants and an adult--provided a rare opportunity to analyze the ef...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1995-04-01 00:00:00
abstract：:Congenital bilateral aplasia of the vas deferens (CBAVD) was suggested to be a mild form of cystic fibrosis (CF). Mutation analysis of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in males with CBAVD revealed that in some males CBAVD is caused by two defective CFTR alleles. The genetic basis of ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1995-06-01 00:00:00
abstract：:Autosomal dominant familial exudative vitreoretinopathy (adFEVR) is a hereditary disorder characterized by the incomplete vascularization of the peripheral retina. The primary biochemical defect in adFEVR is unknown. The adFEVR locus has tentatively been assigned to 11q by linkage studies. We report the results of an ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-10-01 00:00:00
abstract：:Numerous case series have addressed the concern that cancer therapy may damage germ cells, leading to clinical disease in offspring of survivors. None has documented an increased risk. However, the methodological problems of small series make it difficult to draw firm conclusions regarding the potential of cancer trea...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301677
更新日期：1998-01-01 00:00:00
abstract：:Plasma DNA fragmentomics is an emerging area in cell-free DNA diagnostics and research. In murine models, it has been shown that the extracellular DNase, DNASE1L3, plays a role in the fragmentation of plasma DNA. In humans, DNASE1L3 deficiency causes familial monogenic systemic lupus erythematosus with childhood onset...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2020.09.006
更新日期：2020-11-05 00:00:00
abstract：:Galactosemia is an autosomal recessive disorder of human galactose metabolism caused by deficiency of the enzyme galactose-1-phosphate uridyl transferase (GALT). The molecular basis of this disorder is at present not well understood. We report here two missense mutations which result in low or undetectable enzymatic a...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1991-10-01 00:00:00
abstract：:Recently, to speed up the differential-diagnosis process based on symptoms and signs observed from an affected individual in the diagnosis of rare diseases, researchers have developed and implemented phenotype-driven differential-diagnosis systems. The performance of those systems relies on the quantity and quality of...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2018.08.003
更新日期：2018-09-06 00:00:00
abstract：:Multiminicore disease (MmD) is an autosomal recessive congenital myopathy characterized by the presence of multiple, short core lesions (known as "minicores") in most muscle fibers. MmD is a clinically heterogeneous condition, in which four subgroups have been distinguished. Homozygous RYR1 mutations have been recentl...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/342719
更新日期：2002-10-01 00:00:00
abstract：:Assignment of a susceptibility locus for cutaneous malignant melanoma-dysplastic nevus (CMM/DN) to chromosome 1p remains controversial. We examined the relationship between CMM/DN and markers D1S47, PND, and D1S160 on seven new families (set B) plus updated versions of six previously reported families (set A). Three l...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1993-03-01 00:00:00
abstract：:In humans, deviations from a 1:1 male:female ratio have been identified in both chromosomally normal and trisomic live births: among normal newborns there is a slight excess of males, among trisomy 18 live borns a large excess of females, and among trisomy 21 live borns an excess of males. These differences could aris...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1996-11-01 00:00:00
abstract：:Dowling-Degos disease (DDD), or reticular pigmented anomaly of the flexures, is a type of rare autosomal-dominant genodermatosis characterized by reticular hyperpigmentation and hypopigmentation of the flexures, such as the neck, axilla, and areas below the breasts and groin, and shows considerable heterogeneity. Loss...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2013.04.022
更新日期：2013-06-06 00:00:00
