Abstract：
:Seventy-seven Ethiopians were investigated for mtDNA and Y chromosome-specific variations, in order to (1) define the different maternal and paternal components of the Ethiopian gene pool, (2) infer the origins of these maternal and paternal lineages and estimate their relative contributions, and (3) obtain information about ancient populations living in Ethiopia. The mtDNA was studied for the RFLPs relative to the six classical enzymes (HpaI, BamHI, HaeII, MspI, AvaII, and HincII) that identify the African haplogroup L and the Caucasoid haplogroups I and T. The sample was also examined at restriction sites that define the other Caucasoid haplogroups (H, U, V, W, X, J, and K) and for the simultaneous presence of the DdeI10394 and AluI10397 sites, which defines the Asian haplogroup M. Four polymorphic systems were examined on the Y chromosome: the TaqI/12f2 and the 49a,f RFLPs, the Y Alu polymorphic element (DYS287), and the sY81-A/G (DYS271) polymorphism. For comparison, the last two Y polymorphisms were also examined in 87 Senegalese previously classified for the two TaqI RFLPs. Results from these markers led to the hypothesis that the Ethiopian population (1) experienced Caucasoid gene flow mainly through males, (2) contains African components ascribable to Bantu migrations and to an in situ differentiation process from an ancestral African gene pool, and (3) exhibits some Y-chromosome affinities with the Tsumkwe San (a very ancient African group). Our finding of a high (20%) frequency of the "Asian" DdeI10394AluI10397 (++) mtDNA haplotype in Ethiopia is discussed in terms of the "out of Africa" model.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Passarino G,Semino O,Quintana-Murci L,Excoffier L,Hammer M,Santachiara-Benerecetti ASdoi
10.1086/301702subject
Has Abstractpub_date
1998-02-01 00:00:00pages
420-34issue
2eissn
0002-9297issn
1537-6605pii
S0002-9297(07)63507-1journal_volume
62pub_type
杂志文章abstract：:We examined DNA polymorphisms in the nonrecombining portion of the Y-chromosome to investigate the contribution of distinct patrilineages to the present-day white Brazilian population. Twelve unique-event polymorphisms were typed in 200 unrelated males from four geographical regions of Brazil and in 93 Portuguese male...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/316931
更新日期：2001-01-01 00:00:00
abstract：:Patients with a strong family history of breast cancer are often counseled to receive genetic screening for BRCA1 and BRCA2 mutations, the strongest known predictors of breast cancer. A major limitation of genetic testing is the number of inconclusive results due to unclassified BRCA1 and BRCA2 sequence variants. Many...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/342192
更新日期：2002-09-01 00:00:00
abstract：:Determining the mode of inheritance is often difficult under the best of circumstances, but when segregation analysis is used, the problems of ambiguous ascertainment procedures, reduced penetrance, heterogeneity, and misdiagnosis make mode-of-inheritance determinations even more unreliable. The mode of inheritance ca...
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：: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：:Four subjects with thermolabile methylenetetrahydrofolate reductase (MTHFR) were discovered among 16 "obligate" heterozygotes for severe MTHFR deficiency and their family members. All four subjects had less than 25% of normal mean MTHFR specific activity in lymphocyte extracts. Three of them with normal serum folate a...
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：:The duplication 17p11.2 syndrome, associated with dup(17)(p11.2p11.2), is a recently recognized syndrome of multiple congenital anomalies and mental retardation and is the first predicted reciprocal microduplication syndrome described--the homologous recombination reciprocal of the Smith-Magenis syndrome (SMS) microde...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/512864
更新日期：2007-04-01 00:00:00
abstract：:In this report, we describe a simple correction for multiple testing of single-nucleotide polymorphisms (SNPs) in linkage disequilibrium (LD) with each other, on the basis of the spectral decomposition (SpD) of matrices of pairwise LD between SNPs. This method provides a useful alternative to more computationally inte...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/383251
更新日期：2004-04-01 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：:We have isolated 68 new RFLP markers on human chromosome 6. Of these, 64 were localized on chromosomal bands by the fluorescent in-situ hybridization (FISH) method, 25 on the short arm and 39 on the long arm. Their distribution was uneven; the markers were localized predominantly in regions of R-positive banding. Elev...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1992-01-01 00:00:00
abstract：:The estimate of heterozygosity and proportion of polymorphic loci for 33 red blood cell loci has been updated by the elimination of some loci of questionable status and the addition of data on 33 loci. The new figures for heterozygosity and proportion of polymorphic loci, .105 and .283, respectively, are based on 60 r...
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：:The mode of inheritance of bipolar affective disorder (BPAD) appears complex, and non-Mendelian models of inheritance have been postulated. Two non-Mendelian phenomena, genomic imprinting and mitochondrial inheritance, may contribute to the complex inheritance pattern seen in BPAD. Both imprinting and mitochondrial in...
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：:Using the technique of in vitro human-hamster fertilization, sperm of four men heterozygous for 4 reciprocal translocations--t(4;17),t(5;13),t(6;7), and t(9;18)--was studied. Frequencies of numerical abnormalities unrelated to the translocations range from 8.3% to 13.3%, and the incidence of imbalances ranges from 23....
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：:Family-based tests of linkage disequilibrium typically are based on nuclear-family data including affected individuals and their parents or their unaffected siblings. A limitation of such tests is that they generally are not valid tests of association when data from related nuclear families from larger pedigrees are u...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302957
更新日期：2000-07-01 00:00:00
abstract：:Two hundred subjects with insulin-dependent (type I) diabetes mellitus (IDDM) were typed for HLA-B, HLA-DR, and properdin factor B (Bf). HLA and Bf antigen and haplotype frequencies in subjects were compared with control frequencies derived from the 8th HLA Workshop. Frequencies of extended haplotypes (defined by B-Bf...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1984-09-01 00:00:00
abstract：:A family-history cancer survey was conducted on 5,486 men who underwent a radical prostatectomy, for clinically localized prostate cancer, in the Department of Urology at the Mayo Clinic during 1966-95; 4,288 men responded to the survey. Complex segregation analysis was performed to assess the genetic basis of age at ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301862
更新日期：1998-06-01 00:00:00
abstract：:Antenatal Bartter syndrome is a variant of inherited renal-tubular disorders associated with hypokalemic alkalosis. This disorder typically presents as a life-threatening condition beginning in utero, with marked fetal polyuria that leads to polyhydramnios and premature delivery. Another hallmark of this variant is a ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/301872
更新日期：1998-06-01 00:00:00
abstract：:Activating mutations in the genes for fibroblast growth factor receptors 1-3 (FGFR1-3) are responsible for a diverse group of skeletal disorders. In general, mutations in FGFR1 and FGFR2 cause the majority of syndromes involving craniosynostosis, whereas the dwarfing syndromes are largely associated with FGFR3 mutatio...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/427956
更新日期：2005-02-01 00:00:00
abstract：:We consider sequential sampling of pedigrees for genetic analysis. Cannings and Thompson (1977) gave simple, general guidelines for valid sequential sampling schemes. We show that their formulation of the likelihood contains an error, which is, however, easily corrected so as to maintain the validity of the sequential...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1986-08-01 00:00:00
abstract：:Familial orthostatic hypotensive disorder is characterized by light-headedness on standing, which may worsen to syncope, palpitations, and blue-purple ankle discoloration, and is accompanied by a marked decrease in systolic blood pressure, an increase in diastolic pressure, and tachycardia, all of which resolve when s...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/302096
更新日期：1998-11-01 00:00:00
abstract：:Keratitis-ichthyosis-deafness syndrome (KID) is a rare ectodermal dysplasia characterized by vascularizing keratitis, profound sensorineural hearing loss (SNHL), and progressive erythrokeratoderma, a clinical triad that indicates a failure in development and differentiation of multiple stratifying epithelia. Here, we ...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/339986
更新日期：2002-05-01 00:00:00
abstract：:Elsewhere we have reported an efficient method for isolating VNTR (Variable Number of Tandem Repeats) markers. Several of the VNTR markers isolated in those experiments were sequenced, and a DNA sequence of 9 bp (GNNGTGGG) emerged as an apparent consensus sequence for VNTR markers. To confirm this result and to develo...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1988-12-01 00:00:00
abstract：:Carotid intimal medial thickness (IMT) is a heritable quantitative measure of atherosclerosis. A genomewide linkage analysis was conducted to localize a quantitative-trait locus (QTL) influencing carotid IMT. Carotid IMT was measured in 596 men and 629 women from 311 extended families (1,242 sib pairs) in the Framingh...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/381559
更新日期：2004-02-01 00:00:00
abstract：:A family history of coronary artery disease (CAD), especially when the disease occurs at a young age, is a potent risk factor for CAD. DNA collection in families in which two or more siblings are affected at an early age allows identification of genetic factors for CAD by linkage analysis. We performed a genomewide sc...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/423900
更新日期：2004-09-01 00:00:00
abstract：:Autism is a heritable but genetically complex disorder characterized by deficits in language and in reciprocal social interactions, combined with repetitive and stereotypic behaviors. As with many genetically complex disorders, numerous genome scans reveal inconsistent results. A genome scan of 345 families from the A...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1086/430278
更新日期：2005-06-01 00:00:00
abstract：:A modified alpha-N-acetylgalactosaminidase (NAGA) with alpha-galactosidase A (GLA)-like substrate specificity was designed on the basis of structural studies and was produced in Chinese hamster ovary cells. The enzyme acquired the ability to catalyze the degradation of 4-methylumbelliferyl-alpha-D-galactopyranoside. I...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2009.09.016
更新日期：2009-11-01 00:00:00
abstract：:Autosomal-recessive congenital ichthyoses represent a large and heterogeneous group of disorders of epidermal cornification. Recent data suggest that most of these disorders might result from defective lipid transport and metabolism. In the present study, we describe a late-onset form of recessive ichthyosis in a larg...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2011.02.011
更新日期：2011-04-08 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：:VNTR fragment lengths in three databases maintained by the FBI for forensic purposes were partitioned into quantile bins, and tests for independence of the two bins at each of six loci were conducted. Whether independence was declared depended on the number of quantiles used. For a large number of quantile bins, equal...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：
更新日期：1993-11-01 00:00:00
abstract：:Early-onset epileptic encephalopathy (EOEE) represents a heterogeneous group of severe disorders characterized by seizures, interictal epileptiform activity with a disorganized electroencephalography background, developmental regression or retardation, and onset before 1 year of age. Among a cohort of 57 individuals w...
journal_title：American journal of human genetics
pub_type： 杂志文章
doi：10.1016/j.ajhg.2016.10.009
更新日期：2016-12-01 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
