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Bravi CM, Motti JMB, García A. Letter to the editor: A Southern Cone origin rather than Peruvian affinities for ancient Patagonian B2 mitogenomes. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024:e24934. [PMID: 38577959 DOI: 10.1002/ajpa.24934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/09/2024] [Accepted: 01/17/2024] [Indexed: 04/06/2024]
Affiliation(s)
- Claudio M Bravi
- Laboratorio de Genética Molecular Poblacional, Instituto Multidisciplinario de Biología Celular (IMBICE), CCT La Plata CONICET-CICPBA-Universidad Nacional de La Plata, 1900 La Plata, Argentina
| | - Josefina M B Motti
- Laboratorio de Ecología Evolutiva Humana, Facultad de Ciencias Sociales, Universidad Nacional del Centro de la Provincia de Buenos Aires. CONICET, CCT- Tandil, 7631 Quequén, Argentina
| | - Angelina García
- Instituto de Antropología de Córdoba, CONICET, Universidad Nacional de Córdoba, Córdoba, Argentina
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2
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Mut P, Bertoni B, Sapiro R, Hidalgo PC, Torres A, Azambuja C, Sans M. Insights into the Y chromosome human diversity in Uruguay. Am J Hum Biol 2023; 35:e23963. [PMID: 37493343 DOI: 10.1002/ajhb.23963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 04/26/2023] [Accepted: 07/04/2023] [Indexed: 07/27/2023] Open
Abstract
BACKGROUND With regard to the origin of its population and microevolutionary processes, Uruguay exhibits distinctive features that distinguish it from other countries in Latin America, while at the same time sharing several similarities. In this article, we will focus on the variability of paternal genetic lineages in two geographical regions with different histories that can be considered as examples of distinct populations for the continent. In general terms, the genetic diversity is a result of different demographic processes related to the American conquest and colonisation. These resulted in distinct ancestral components which vary geographical and depend on the distribution by sex within these components. In Uruguay, native maternal haplogroups are significantly more frequent in the North. Although there are several studies about the geneticvariability of Uruguay, little is known about male genetic lineages. AIMS The aim of this work is to present an updated study of the male genetic variability of the Uruguayan population. METHODS We analyzed 13 biallelic markers and 27 STRs located in the male-specific region of the Y chromosome for 157 males: 98 from the capital, Montevideo, and 59 from Tacuarembó. RESULTS Almost all haplogroups found in both locations are European (99% and 93.2% respectively). One Sub-Saharan African haplogroup was found in Montevideo (1%) and 2 in Tacuarembó (3%), while Native haplogroups were found only in Tacuarembó, evidencing a strong sex-biased admixture. By crossing genetic and genealogical information we could relate European haplogroups with different waves and times of migrations. DISCUSSION Network analysis indicated a very diverse male population, suggesting that European migrants came from heterogeneous geographic locations and in different waves. Tacuarembó has closer population affinities with Iberian populations while Montevideo is more diverse. Male population expansion expansion, can be explained by the large number of migrants that arrived during the XIX century and the first half of the XX century. CONCLUSIONS The Uruguayan male gene pool is the result of several migration waves with diverse origins, with strong sex-biased admixture that can be explained by the European migration, the violence against the indigenous males, and the segregation of the Africansadmixture that can be explained due to European migration, violence against Natives, and segregation against African males.admixture that can be explained due to European migration, violence against Natives, and segregation against African males.admixture that can be explained due to European migration, violence against Natives, and segregation against African males.admixture that can be explained due to European migration, violence against Natives, and segregation of hte Africans.
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Affiliation(s)
- Patricia Mut
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, UdelaR, Montevideo, Uruguay
| | - Bernardo Bertoni
- Departamento de Genética, Facultad de Medicina, UdelaR, Montevideo, Uruguay
| | - Rossana Sapiro
- Departamento de Histología y Embriología, Facultad de Medicina, UdelaR, Montevideo, Uruguay
| | - Pedro C Hidalgo
- Polo de Desarrollo Universitario Diversidad Genética Humana, Centro Universitario Noreste, Tacuarembó, Uruguay
| | | | | | - Mónica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, UdelaR, Montevideo, Uruguay
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3
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Zollner L, Torres D, Briceno I, Gilbert M, Torres-Mejía G, Dennis J, Bolla MK, Wang Q, Hamann U, Lorenzo Bermejo J. Native American ancestry and breast cancer risk in Colombian and Mexican women: ruling out potential confounding through ancestry-informative markers. Breast Cancer Res 2023; 25:111. [PMID: 37784177 PMCID: PMC10544431 DOI: 10.1186/s13058-023-01713-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 09/18/2023] [Indexed: 10/04/2023] Open
Abstract
BACKGROUND Latin American and Hispanic women are less likely to develop breast cancer (BC) than women of European descent. Observational studies have found an inverse relationship between the individual proportion of Native American ancestry and BC risk. Here, we use ancestry-informative markers to rule out potential confounding of this relationship, estimating the confounder-free effect of Native American ancestry on BC risk. METHODS AND STUDY POPULATION We used the informativeness for assignment measure to select robust instrumental variables for the individual proportion of Native American ancestry. We then conducted separate Mendelian randomization (MR) analyses based on 1401 Colombian women, most of them from the central Andean regions of Cundinamarca and Huila, and 1366 Mexican women from Mexico City, Monterrey and Veracruz, supplemented by sensitivity and stratified analyses. RESULTS The proportion of Colombian Native American ancestry showed a putatively causal protective effect on BC risk (inverse variance-weighted odds ratio [OR] = 0.974 per 1% increase in ancestry proportion, 95% confidence interval [CI] 0.970-0.978, p = 3.1 × 10-40). The corresponding OR for Mexican Native American ancestry was 0.988 (95% CI 0.987-0.990, p = 1.4 × 10-44). Stratified analyses revealed a stronger association between Native American ancestry and familial BC (Colombian women: OR = 0.958, 95% CI 0.952-0.964; Mexican women: OR = 0.973, 95% CI 0.969-0.978), and stronger protective effects on oestrogen receptor (ER)-positive BC than on ER-negative and triple-negative BC. CONCLUSIONS The present results point to an unconfounded protective effect of Native American ancestry on BC risk in both Colombian and Mexican women which appears to be stronger for familial and ER-positive BC. These findings provide a rationale for personalised prevention programmes that take genetic ancestry into account, as well as for future admixture mapping studies.
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Affiliation(s)
- Linda Zollner
- Statistical Genetics Research Group, Institute of Medical Biometry, Heidelberg University, Heidelberg, Germany
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120, Heidelberg, Germany
- Division of Proteomics of Stem Cells and Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Diana Torres
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120, Heidelberg, Germany
- Institute of Human Genetics, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Ignacio Briceno
- Instituto de Genética Humana, Universidad de la Sabana, Bogotá, Colombia
| | - Michael Gilbert
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120, Heidelberg, Germany
| | - Gabriela Torres-Mejía
- Center for Population Health Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico
| | - Joe Dennis
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Manjeet K Bolla
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Qin Wang
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Ute Hamann
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120, Heidelberg, Germany.
| | - Justo Lorenzo Bermejo
- Statistical Genetics Research Group, Institute of Medical Biometry, Heidelberg University, Heidelberg, Germany
- Department of Biostatistics for Precision Oncology, Institut de Cancérologie Strasbourg Europe, Strasbourg, France
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4
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Felkl AB, Avila E, Gastaldo AZ, Lindholz CG, Dorn M, Alho CS. Ancestry resolution of South Brazilians by forensic 165 ancestry-informative SNPs panel. Forensic Sci Int Genet 2023; 64:102838. [PMID: 36736201 DOI: 10.1016/j.fsigen.2023.102838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 01/15/2023] [Accepted: 01/22/2023] [Indexed: 01/24/2023]
Abstract
Forensic DNA phenotyping (FDP) includes biogeographic ancestry (BGA) inference and externally visible characteristics (EVCs) prediction directly from an evidential DNA sample as alternatives to provide valuable intelligence when conventional DNA profiling fails to achieve identification. In this context, the application of Massively Parallel Sequencing (MPS) methodologies, which enables simultaneous typing of multiple samples and hundreds of forensic markers, has been gradually implemented in forensic genetic casework. The Precision ID Ancestry Panel (Thermo Fisher Scientific, Waltham, USA) is a forensic multiplex assay consisting of 165 autosomal SNPs designed to provide biogeographic ancestry information. In this work, a sample of 250 individuals from Rio Grande do Sul (RS) State, southern Brazil, apportioned into four main population groups (African-, European-, Amerindian-, and Admixed-derived Gauchos), was evaluated with this panel, to assess the feasibility of this approach in a highly heterogeneous population. Forensic descriptive parameters estimated for each population group revealed that this panel has enough polymorphic and informative SNPs to be used as a supplementary instrument in forensic individual identification and kinship testing regardless of ethnicity. No statistically significant deviation from Hardy-Weinberg equilibrium was observed after Bonferroni correction. However, seven loci pairs displayed linkage disequilibrium in pairwise LD testing (p < 3.70 × 10-6). Interpopulation comparisons by FST analysis, MDS plot, and STRUCTURE analysis among the four RS population groups apart and along with 89 reference worldwide populations demonstrated that Admixed- and African-derived Gauchos present the highest levels of admixture and population stratification, whereas European- and Amerindian-derived exhibit a more homogeneous genetic conformation.
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Affiliation(s)
- Aline Brugnera Felkl
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil.
| | - Eduardo Avila
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Technical Scientific Section, Federal Police Department in Rio Grande do Sul State, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil
| | - André Zoratto Gastaldo
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil
| | - Catieli Gobetti Lindholz
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Márcio Dorn
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil; Institute of Informatics, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Clarice Sampaio Alho
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil
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5
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Avila E, Speransa PA, Lindholz CG, Kahmann A, Alho CS. Haplotype distribution in a forensic full mtDNA genome database of admixed Southern Brazilians and its association with self-declared ancestry and pigmentation traits. Forensic Sci Int Genet 2021; 57:102650. [PMID: 34972071 DOI: 10.1016/j.fsigen.2021.102650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 12/01/2021] [Indexed: 11/04/2022]
Abstract
BACKGROUND The advent of massively parallel sequencing (MPS) applications focused on the generation of forensic-quality full mitochondrial genome sequences led to a popularization of the technique on a global scale. However, the lack of forensic-graded population databases has refrained a wider adoption of full genome sequences as the industry standard, despite its better discrimination capacity of individual maternal lineages. PURPOSE This work describes a forensic-oriented full mtDNA genome database comprised of 480 samples from a Southern Brazilian population. METHODS A collection of mitochondrial sequences were obtained from low-pass, full genome DNA sequencing results. The complete sample set was evaluated regarding haplotype composition and distribution. Summary statistics and forensic parameters were calculated and are presented for the database, with detailed information concerning the impact of removing genetic information in the form of specific variants or increasingly larger genomic regions. Interpopulational analysis comparing haplotypical diversity in Brazilian and 26 worldwide populations was also performed. The association between mitochondrial genetic variability and phenotypic diversity was also evaluated in populations, with self-declared ancestry and three distinct phenotypic pigmentation traits (eyes, skin and hair colors) as parameters. RESULTS The presented database can be used to evaluate mitochondrial-related genetic evidence, providing LR values of up to 20,465 for unobserved haplotypes. Haplotype distribution in Southern Brazil seems to be different than the remaining of the country, with a larger contribution of maternal lines with European origin. Despite association can be found between lighter and darker phenotypes or self-declared ancestry and haplotype distribution, prediction models cannot be reliably proposed due to the admixed nature of the Brazilian population. CONCLUSIONS The proposed database provides a basis for statistical calculation and frequency estimation of full mitochondrial genomes, and can be part of an integrated, representative, national database comprising most of the genetic diversity of maternal lineages in the country.
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Affiliation(s)
- Eduardo Avila
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Technical Scientific Section, Federal Police Department in Rio Grande do Sul State, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil.
| | - Pietro Augusto Speransa
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
| | - Catieli Gobetti Lindholz
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
| | - Alessandro Kahmann
- National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil; Institute of Mathematics, Statistics and Physics, Federal University of Rio Grande, Rio Grande, RS, Brazil.
| | - Clarice Sampaio Alho
- Forensic Genetics Laboratory, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, RS, Brazil; National Institute of Science and Technology - Forensic Science, Porto Alegre, RS, Brazil.
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6
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Fernandez ML. Lifestyle Factors and Genetic Variants Associated to Health Disparities in the Hispanic Population. Nutrients 2021; 13:2189. [PMID: 34202120 PMCID: PMC8308310 DOI: 10.3390/nu13072189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 11/16/2022] Open
Abstract
Non-communicable diseases including type 2 diabetes mellitus, coronary heart disease, hepatic steatosis, and cancer are more prevalent in minority groups including Hispanics when compared to Non-Hispanic Whites, leading to the well-recognized terminology of health disparities. Although lifestyle factors including inadequate dietary habits, decreased physical activity, and more prominently, an unhealthy body weight, may be partly responsible for this disproportion in chronic diseases, genetic variations also make a substantial contribution to this problem. In this review, the well-recognized obesity problem in Hispanics that has been associated with chronic disease is examined as well as the influence of diet on promoting an inflammatory environment leading to increased cardiometabolic risk, insulin resistance, fatty liver disease, and cancer. In addition, some of the more studied genetic variations in Hispanics and their association with chronic disease is reviewed.
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Affiliation(s)
- Maria Luz Fernandez
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
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7
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Roca-Rada X, Politis G, Messineo PG, Scheifler N, Scabuzzo C, González M, Harkins KM, Reich D, Souilmi Y, Teixeira JC, Llamas B, Fehren-Schmitz L. Ancient mitochondrial genomes from the Argentinian Pampas inform the early peopling of the Southern Cone of South America. iScience 2021; 24:102553. [PMID: 34142055 PMCID: PMC8188552 DOI: 10.1016/j.isci.2021.102553] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/26/2021] [Accepted: 05/14/2021] [Indexed: 01/02/2023] Open
Abstract
The Southern Cone of South America (SCSA) is a key region for investigations about the peopling of the Americas. However, little is known about the eastern sector, the Argentinian Pampas. We analyzed 18 mitochondrial genomes—7 of which are novel—from human skeletal remains from 3 Early to Late Holocene archaeological sites. The Pampas present a distinctive genetic makeup compared to other Middle to Late Holocene pre-Columbian SCSA populations. We also report the earliest individuals carrying SCSA-specific mitochondrial haplogroups D1j and D1g from Early and Middle Holocene, respectively. Using these deep calibration time points in Bayesian phylogenetic reconstructions, we suggest that the first settlers of the Pampas were part of a single and rapid dispersal ∼15,600 years ago. Finally, we propose that present-day genetic differences between the Pampas and the rest of the SCSA are due to founder effects, genetic drift, and a partial population replacement ∼9,000 years ago. Analysis of 18 ancient human mitochondrial genomes from the Argentinian Pampas. Genetic makeup of Early-Mid Holocene Pampas distinct from later neighboring peoples. Earliest individuals carrying region-specific mitochondrial haplogroups D1j and D1g. First Pampean settlers were part of a single and rapid dispersal ∼15,600 years ago.
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Affiliation(s)
- Xavier Roca-Rada
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia
| | - Gustavo Politis
- INCUAPA-CONICET, Facultad de Ciencias Sociales, Universidad Nacional del Centro de la Provincia de Buenos Aires, Olavarría, Buenos Aires, Argentina.,Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Buenos Aires, Argentina
| | - Pablo G Messineo
- INCUAPA-CONICET, Facultad de Ciencias Sociales, Universidad Nacional del Centro de la Provincia de Buenos Aires, Olavarría, Buenos Aires, Argentina
| | - Nahuel Scheifler
- INCUAPA-CONICET, Facultad de Ciencias Sociales, Universidad Nacional del Centro de la Provincia de Buenos Aires, Olavarría, Buenos Aires, Argentina
| | - Clara Scabuzzo
- CICYTTP-CONICET, Provincia de Entre Ríos-UADER-División Arqueología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata. Dr. Materi y España (3105), Diamante, Entre Ríos Argentina
| | - Mariela González
- INCUAPA-CONICET, Facultad de Ciencias Sociales, Universidad Nacional del Centro de la Provincia de Buenos Aires, Olavarría, Buenos Aires, Argentina
| | - Kelly M Harkins
- UCSC Paleogenomics Department of Anthropology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - David Reich
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.,Department of Human Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.,Broad Institute of Harvard and MIT, Cambridge, MA 02142, USA.,Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115, USA
| | - Yassine Souilmi
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia.,National Centre for Indigenous Genomics, Australian National University, Canberra, ACT 0200, Australia.,Environment Institute, University of Adelaide, Adelaide, SA 5005, Australia
| | - João C Teixeira
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia.,Centre of Excellence for Australian Biodiversity and Heritage (CABAH), University of Adelaide, Adelaide, SA 5005, Australia
| | - Bastien Llamas
- Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia.,National Centre for Indigenous Genomics, Australian National University, Canberra, ACT 0200, Australia.,Environment Institute, University of Adelaide, Adelaide, SA 5005, Australia.,Centre of Excellence for Australian Biodiversity and Heritage (CABAH), University of Adelaide, Adelaide, SA 5005, Australia
| | - Lars Fehren-Schmitz
- UCSC Paleogenomics Department of Anthropology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.,UCSC Genomics Institute, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
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Abstract
Cultural diversity is disappearing quickly. Whilst a phylogenetic approach makes explicit the continuous extinction of cultures, and the generation of new ones, cultural evolutionary changes such as the rise of agriculture or more recently colonisation can cause periods of mass cultural extinction. At the current rate, 90% of languages will become extinct or moribund by the end of this century. Unlike biological extinction, cultural extinction does not necessarily involve genetic extinction or even deaths, but results from the disintegration of a social entity and discontinuation of culture-specific behaviours. Here we propose an analytical framework to examine the phenomenon of cultural extinction. When examined over millennia, extinctions of cultural traits or institutions can be studied in a phylogenetic comparative framework that incorporates archaeological data on ancestral states. Over decades or centuries, cultural extinction can be studied in a behavioural ecology framework to investigate how the fitness consequences of cultural behaviours and population dynamics shift individual behaviours away from the traditional norms. Frequency-dependent costs and benefits are key to understanding both the origin and the loss of cultural diversity. We review recent evolutionary studies that have informed cultural extinction processes and discuss avenues of future studies.
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Affiliation(s)
- Hanzhi Zhang
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
| | - Ruth Mace
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
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9
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Soler AM, Piellusch BF, da Silveira L, Pedroso GA, López P, Savio E, Sonati MDF, da Luz J. Alpha thalassemia and alpha-MRE haplotypes in Uruguayan patients with microcytosis and hypochromia without anemia. Genet Mol Biol 2021; 44:e20200399. [PMID: 33769430 PMCID: PMC7995682 DOI: 10.1590/1678-4685-gmb-2020-0399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/10/2021] [Indexed: 11/21/2022] Open
Abstract
Alpha thalassemia is the most common genetic disorder across the world, being the α-3.7 deletion the most frequent mutation. In order to analyze the spectrum and origin of alpha thalassemia mutations in Uruguay, we obtained a sample of 168 unrelated outpatients with normal hemoglobin levels with microcytosis and hypochromia from two cities: Montevideo and Salto. The presence of α-thalassemia mutations was investigated by gap-PCR, restriction endonucleases analysis and HBA2 and HBA1 genes sequencing, whereas the alpha-MRE haplotypes were investigated by sequencing. We found 55 individuals (32.7%) with α-thalassemia mutations, 51(30.4%) carrying the -α3.7 deletion, one with the -α4.2 deletion and three having the rare punctual mutation HBA2:c.-59C>T. Regarding alpha-MRE analysis, we observed a significant higher frequency of haplotype D, characteristic of African populations, in the sample with the -α3.7 deletion. These results show that α-thalassemia mutations are an important determinant of microcytosis and hypochromia in Uruguayan patients with microcytosis and hypochromia without anemia, mainly due to the -α3.7 deletion. The alpha-MRE haplotypes and the α-thalassemia mutations spectrum suggest a predominant, but not exclusive, African origin of these mutations in Uruguay.
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Affiliation(s)
- Ana María Soler
- Universidad de la República (UdelaR), Centro Universitario Regional (CENUR) Litoral Norte, Departamento de Ciencias Biológicas, Laboratorio de Genética Molecular Humana, Salto, Uruguay
| | - Bruna Facanali Piellusch
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Patología Clínica, Campinas, SP, Brazil
| | - Lorena da Silveira
- Universidad de la República (UdelaR), Centro Universitario Regional (CENUR) Litoral Norte, Departamento de Ciencias Biológicas, Laboratorio de Genética Molecular Humana, Salto, Uruguay
| | - Gisele Audrei Pedroso
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Patología Clínica, Campinas, SP, Brazil
| | - Pablo López
- Universidad de la República (UdelaR), Facultad de Medicina, Hospital de Clínicas Manuel Quintela, Departamento de Laboratorio de Patología Clínica, Montevideo, Uruguay
| | - Enrique Savio
- Administración de los Servicios de Salud del Estado (ASSE), Hospital Departamental de Salto, Servicio de Laboratorio Clínico, Salto, Uruguay
| | - María de Fatima Sonati
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Patología Clínica, Campinas, SP, Brazil
| | - Julio da Luz
- Universidad de la República (UdelaR), Centro Universitario Regional (CENUR) Litoral Norte, Departamento de Ciencias Biológicas, Laboratorio de Genética Molecular Humana, Salto, Uruguay
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10
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Measuring the impact of European colonization on Native American populations in Southern Brazil and Uruguay: Evidence from mtDNA. Am J Hum Biol 2019; 31:e23243. [DOI: 10.1002/ajhb.23243] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 02/05/2019] [Accepted: 03/10/2019] [Indexed: 01/26/2023] Open
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11
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Torres D, Lorenzo Bermejo J, Garcia Mesa K, Gilbert M, Briceño I, Pohl-Zeidler S, González Silos R, Boekstegers F, Plass C, Hamann U. Interaction between genetic ancestry and common breast cancer susceptibility variants in Colombian women. Int J Cancer 2019; 144:2181-2191. [PMID: 30485434 DOI: 10.1002/ijc.32023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 11/05/2018] [Indexed: 01/31/2023]
Abstract
Latino women show lower incidences of breast cancer (BC) than non-Hispanic whites. Large-scale genetic association studies have identified variants robustly associated with BC risk in European women. We examine here the relevance of these variants to Colombian BC and possible interactions with genetic ancestry. Native American, European and African proportions were estimated for 1022 Colombian BC cases and 1023 controls. Logistic regression was applied to assess the association between 78 variants and BC risk and interactions between the variants and ancestry proportions. We constructed a multifactorial risk score combining established BC risk factors, associated risk variants and individual ancestry proportions. Each 1% increase in the Native American proportion translated into a 2.2% lower BC risk (95% CI: 1.4-2.9). Thirteen variants were associated with BC in Colombian women, with allele frequencies and risk effects partially different from European women. Ancestry proportions moderated the risk effects of two variants. The ability of Native American proportions to separate Colombian cases and controls (area-under-the-curve (AUC) = 0.61) was similar to the discriminative ability of family history of BC in first-degree female relatives (AUC = 0.58) or the combined effect of all 13 associated risk variants (AUC = 0.57). Our findings demonstrate ample potential for individualized BC prevention in Hispanic women taking advantage of individual Native American proportions, information on established susceptibility factors and recently identified common risk variants.
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Affiliation(s)
- Diana Torres
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Institute of Human Genetics, Pontificia Universidad Javeriana, Bogota, Colombia
| | - Justo Lorenzo Bermejo
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Karen Garcia Mesa
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Michael Gilbert
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Ignacio Briceño
- Institute of Human Genetics, Pontificia Universidad Javeriana, Bogota, Colombia.,Universidad de la Sabana, Bogota, Colombia
| | - Svenja Pohl-Zeidler
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rosa González Silos
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Felix Boekstegers
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Christoph Plass
- Division of Epigenomics and Cancer Risk Factors, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Ute Hamann
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
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12
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Fagundes NJR, Tagliani-Ribeiro A, Rubicz R, Tarskaia L, Crawford MH, Salzano FM, Bonatto SL. How strong was the bottleneck associated to the peopling of the Americas? New insights from multilocus sequence data. Genet Mol Biol 2018; 41:206-214. [PMID: 29668018 PMCID: PMC5913727 DOI: 10.1590/1678-4685-gmb-2017-0087] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 05/23/2017] [Indexed: 12/31/2022] Open
Abstract
In spite of many genetic studies that contributed for a deep knowledge about the peopling of the Americas, no consensus has emerged about important parameters such as the effective size of the Native Americans founder population. Previous estimates based on genomic datasets may have been biased by the use of admixed individuals from Latino populations, while other recent studies using samples from Native American individuals relied on approximated analytical approaches. In this study we use resequencing data for nine independent regions in a set of Native American and Siberian individuals and a full-likelihood approach based on isolation-with-migration scenarios accounting for recent flow between Asian and Native American populations. Our results suggest that, in agreement with previous studies, the effective size of the Native American population was small, most likely in the order of a few hundred individuals, with point estimates close to 250 individuals, even though credible intervals include a number as large as ~4,000 individuals. Recognizing the size of the genetic bottleneck during the peopling of the Americas is important for determining the extent of genetic markers needed to characterize Native American populations in genome-wide studies and to evaluate the adaptive potential of genetic variants in this population.
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Affiliation(s)
- Nelson J R Fagundes
- Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Alice Tagliani-Ribeiro
- Fertilitat Centro de Medicina Reprodutiva, Centro Clínico da Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Rohina Rubicz
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Larissa Tarskaia
- Laboratory of Biological Anthropology, University of Kansas, Lawrence, KS, USA
| | - Michael H Crawford
- Laboratory of Biological Anthropology, University of Kansas, Lawrence, KS, USA
| | - Francisco M Salzano
- Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Sandro L Bonatto
- Faculdade de Biociências, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
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13
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Boquett JA, Nunes JM, Buhler S, de Oliveira MZ, Jobim LF, Jobim M, Fagundes NJR, Schüler-Faccini L, Sanchez-Mazas A. The HLA-A, -B and -DRB1 polymorphism in a large dataset of South Brazil bone marrow donors from Rio Grande do Sul. HLA 2016; 89:29-38. [PMID: 27910249 DOI: 10.1111/tan.12933] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 10/12/2016] [Accepted: 10/26/2016] [Indexed: 12/18/2022]
Abstract
Human leukocyte antigen (HLA) genes are very informative in population genetics studies and their variability has been widely used to reconstruct the history of geographic and/or demographic expansions of human populations. The characterization of HLA diversity at the population level is also fundamental in clinical studies, particularly for bone marrow transplantation programs. In this study, we investigated the HLA molecular variation in Rio Grande do Sul, South Brazil, in order to identify possible regional differences across this state. More than 97,000 bone marrow donors were typed at the HLA- A, -B and -DRB1 loci and analyzed by considering two kinds of subdivisions based on both self-identified ethnicity and place of residence: (a) the official geographic subdivision defined by the Brazilian Institute of Geography and Statistics and (b) known information about the colonization history of the state. HLA allele and haplotype frequencies were estimated and compared among the defined subgroups. The results indicate a lack of correlation between genetic variation and geography and thus no clear HLA genetic structure based on geographic criteria. On the other hand, major differences were observed regarding ethnicity. In addition, local populations from Rio Grande do Sul were found to be genetically similar to their corresponding parental European populations from Germany, Italy and Portugal, as documented by historical data. Overall, this study provides a thorough characterization of the HLA genetic variation in Rio Grande do Sul and a better understanding of its demographic history, being most useful for the development of more efficient strategies in bone marrow donors' recruitment.
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Affiliation(s)
- J A Boquett
- Instituto Nacional de Genética Médica Populacional (iNaGeMP), Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - J M Nunes
- Laboratory of Anthropology, Genetics and Peopling History, Department of Genetics and Evolution - Anthropology Unit, University of Geneva, Geneva, Switzerland.,Institute of Genetics and Genomics in Geneva (iGE3), University of Geneva, Geneva, Switzerland
| | - S Buhler
- Laboratory of Anthropology, Genetics and Peopling History, Department of Genetics and Evolution - Anthropology Unit, University of Geneva, Geneva, Switzerland.,Transplantation Immunology Unit and National Reference Laboratory for Histocompatibility, Department of Genetic and Laboratory Medicine, Geneva University Hospitals, Geneva, Switzerland
| | - M Z de Oliveira
- Instituto Nacional de Genética Médica Populacional (iNaGeMP), Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.,Advanced Visualization Laboratory (VIZLab), Universidade do Vale dos Sinos, São Leopoldo, Brazil
| | - L F Jobim
- Department of Immunology, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - M Jobim
- Department of Immunology, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - N J R Fagundes
- Instituto Nacional de Genética Médica Populacional (iNaGeMP), Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - L Schüler-Faccini
- Instituto Nacional de Genética Médica Populacional (iNaGeMP), Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - A Sanchez-Mazas
- Laboratory of Anthropology, Genetics and Peopling History, Department of Genetics and Evolution - Anthropology Unit, University of Geneva, Geneva, Switzerland.,Institute of Genetics and Genomics in Geneva (iGE3), University of Geneva, Geneva, Switzerland
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14
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Adhikari K, Mendoza-Revilla J, Chacón-Duque JC, Fuentes-Guajardo M, Ruiz-Linares A. Admixture in Latin America. Curr Opin Genet Dev 2016; 41:106-114. [PMID: 27690355 DOI: 10.1016/j.gde.2016.09.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/12/2016] [Accepted: 09/13/2016] [Indexed: 12/18/2022]
Abstract
Latin Americans arguably represent the largest recently admixed populations in the world. This reflects a history of massive settlement by immigrants (mostly Europeans and Africans) and their variable admixture with Natives, starting in 1492. This process resulted in the population of Latin America showing an extensive genetic and phenotypic diversity. Here we review how genetic analyses are being applied to examine the demographic history of this population, including patterns of mating, population structure and ancestry. The admixture history of Latin America, and the resulting extensive diversity of the region, represents a natural experiment offering an advantageous setting for genetic association studies. We review how recent analyses in Latin Americans are contributing to elucidating the genetic architecture of human complex traits.
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Affiliation(s)
- Kaustubh Adhikari
- Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK
| | - Javier Mendoza-Revilla
- Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK
| | - Juan Camilo Chacón-Duque
- Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK
| | | | - Andrés Ruiz-Linares
- Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, UK.
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15
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Ancestry variation and footprints of natural selection along the genome in Latin American populations. Sci Rep 2016; 6:21766. [PMID: 26887503 PMCID: PMC4757894 DOI: 10.1038/srep21766] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 01/25/2016] [Indexed: 02/08/2023] Open
Abstract
Latin American populations stem from the admixture of Europeans, Africans and Native Americans, which started over 400 years ago and had lasted for several centuries. Extreme deviation over the genome-wide average in ancestry estimations at certain genomic locations could reflect recent natural selection. We evaluated the distribution of ancestry estimations using 678 genome-wide microsatellite markers in 249 individuals from 13 admixed populations across Latin America. We found significant deviations in ancestry estimations including three locations with more than 3.5 times standard deviations from the genome-wide average: an excess of European ancestry at 1p36 and 14q32, and an excess of African ancestry at 6p22. Using simulations, we could show that at least the deviation at 6p22 was unlikely to result from genetic drift alone. By applying different linguistic groups as well as the most likely ancestral Native American populations as the ancestry, we showed that the choice of Native American ancestry could affect the local ancestry estimation. However, the signal at 6p22 consistently appeared in most of the analyses using various ancestral groups. This study provided important insights for recent natural selection in the context of the unique history of the New World and implications for disease mapping.
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16
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Sans M, Figueiro G, Hughes CE, Lindo J, Hidalgo PC, Malhi RS. A South American Prehistoric Mitogenome: Context, Continuity, and the Origin of Haplogroup C1d. PLoS One 2015; 10:e0141808. [PMID: 26509686 PMCID: PMC4625051 DOI: 10.1371/journal.pone.0141808] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 10/13/2015] [Indexed: 12/18/2022] Open
Abstract
Based on mitochondrial DNA (mtDNA), it has been estimated that at least 15 founder haplogroups peopled the Americas. Subhaplogroup C1d3 was defined based on the mitogenome of a living individual from Uruguay that carried a lineage previously identified in hypervariable region I sequences from ancient and modern Uruguayan individuals. When complete mitogenomes were studied, additional substitutions were found in the coding region of the mitochondrial genome. Using a complete ancient mitogenome and three modern mitogenomes, we aim to clarify the ancestral state of subhaplogroup C1d3 and to better understand the peopling of the region of the Río de la Plata basin, as well as of the builders of the mounds from which the ancient individuals were recovered. The ancient mitogenome, belonging to a female dated to 1,610±46 years before present, was identical to the mitogenome of one of the modern individuals. All individuals share the mutations defining subhaplogroup C1d3. We estimated an age of 8,974 (5,748–12,261) years for the most recent common ancestor of C1d3, in agreement with the initial peopling of the geographic region. No individuals belonging to the defined lineage were found outside of Uruguay, which raises questions regarding the mobility of the prehistoric inhabitants of the country. Moreover, the present study shows the continuity of Native lineages over at least 6,000 years.
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Affiliation(s)
- Mónica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
| | - Gonzalo Figueiro
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
| | - Cris E Hughes
- Department of Anthropology, University of Illinois, Urbana, Illinois, United States of America
| | - John Lindo
- Department of Anthropology, University of Illinois, Urbana, Illinois, United States of America
| | - Pedro C Hidalgo
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
| | - Ripan S Malhi
- Department of Anthropology, University of Illinois, Urbana, Illinois, United States of America; Carl R Woese Institute for Genomic Biology, University of Illinois, Urbana, Illinois, United States of America
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17
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Bryc K, Durand EY, Macpherson JM, Reich D, Mountain JL. The genetic ancestry of African Americans, Latinos, and European Americans across the United States. Am J Hum Genet 2015; 96:37-53. [PMID: 25529636 PMCID: PMC4289685 DOI: 10.1016/j.ajhg.2014.11.010] [Citation(s) in RCA: 425] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 11/17/2014] [Indexed: 12/11/2022] Open
Abstract
Over the past 500 years, North America has been the site of ongoing mixing of Native Americans, European settlers, and Africans (brought largely by the trans-Atlantic slave trade), shaping the early history of what became the United States. We studied the genetic ancestry of 5,269 self-described African Americans, 8,663 Latinos, and 148,789 European Americans who are 23andMe customers and show that the legacy of these historical interactions is visible in the genetic ancestry of present-day Americans. We document pervasive mixed ancestry and asymmetrical male and female ancestry contributions in all groups studied. We show that regional ancestry differences reflect historical events, such as early Spanish colonization, waves of immigration from many regions of Europe, and forced relocation of Native Americans within the US. This study sheds light on the fine-scale differences in ancestry within and across the United States and informs our understanding of the relationship between racial and ethnic identities and genetic ancestry.
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Affiliation(s)
- Katarzyna Bryc
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA; 23andMe, Inc., Mountain View, CA 94043, USA.
| | | | | | - David Reich
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA; Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
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18
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Sans M, Mones P, Figueiro G, Barreto I, Motti JM, Coble MD, Bravi CM, Hidalgo PC. The mitochondrial DNA history of a former native American village in northern Uruguay. Am J Hum Biol 2014; 27:407-16. [DOI: 10.1002/ajhb.22667] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 10/24/2014] [Accepted: 11/11/2014] [Indexed: 12/20/2022] Open
Affiliation(s)
- Mónica Sans
- Departamento de Antropología Biológica; Facultad de Humanidades y Ciencias de la Educación, Universidad de la República; Montevideo Uruguay
| | - Pablo Mones
- Departamento de Antropología Biológica; Facultad de Humanidades y Ciencias de la Educación, Universidad de la República; Montevideo Uruguay
| | - Gonzalo Figueiro
- Departamento de Antropología Biológica; Facultad de Humanidades y Ciencias de la Educación, Universidad de la República; Montevideo Uruguay
| | - Isabel Barreto
- Departamento de Antropología Biológica; Facultad de Humanidades y Ciencias de la Educación, Universidad de la República; Montevideo Uruguay
| | - Josefina M.B. Motti
- Laboratorio de Ecología Evolutiva Humana; Facultad de Ciencias Sociales, Universidad Nacional del Centro de la Provincia de Buenos Aires; Quequén Argentina
- Facultad de Ciencias Naturales y Museo; Universidad Nacional de La Plata; La Plata Argentina
| | - Michael D. Coble
- National Institute of Standards and Technology; Gaithersburg Maryland
| | - Claudio M. Bravi
- Facultad de Ciencias Naturales y Museo; Universidad Nacional de La Plata; La Plata Argentina
- Instituto Multidisciplinario de Biología Celular (IMBICE); CCT La Plata CONICET-CICPBA; La Plata Argentina
| | - Pedro C. Hidalgo
- Departamento de Antropología Biológica; Facultad de Humanidades y Ciencias de la Educación, Universidad de la República; Montevideo Uruguay
- Centro Universitario de Tacuarembó; Universidad de la República; Tacuarembó Uruguay
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19
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Wade P, Deister VG, Kent M, Olarte Sierra MF, del Castillo Hernández AD. Nation and the Absent Presence of Race in Latin American Genomics. CURRENT ANTHROPOLOGY 2014. [DOI: 10.1086/677945] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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20
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Kent M, Santos RV, Wade P. Negotiating Imagined Genetic Communities: Unity and Diversity in Brazilian Science and Society. AMERICAN ANTHROPOLOGIST 2014. [DOI: 10.1111/aman.12142] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Kent
- Social Anthropology; School of Social Sciences, University of Manchester, Manchester; M13 9PL United Kingdom
| | - Ricardo Ventura Santos
- Fundação Oswaldo Cruz; Escola Nacional de Saúde Pública; Rua Leopoldo Bulhões 1480; sala 617, Rio de Janeiro 21041-210 Brazil
| | - Peter Wade
- Social Anthropology, School of Social Sciences; University of Manchester, Manchester; M13 9PL United Kingdom
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21
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Ruiz-Linares A. How genes have illuminated the history of early Americans and Latino Americans. Cold Spring Harb Perspect Biol 2014; 7:cshperspect.a008557. [PMID: 25256008 DOI: 10.1101/cshperspect.a008557] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The American continent currently accounts for ∼15% of the world population. Although first settled thousands of years ago and fitting its label as "the New World," the European colonial expansion initiated in the late 15th century resulted in people from virtually every corner of the globe subsequently settling in the Americas. The arrival of large numbers of immigrants led to a dramatic decline of the Native American population and extensive population mixing. A salient feature of the current human population of the Americas is, thus, its great diversity. The genetic variation of the Native peoples that recent immigrants encountered had been shaped by demographic events acting since the initial peopling of the continent. Similarly, but on a compressed timescale, the colonial history of the Americas has had a major impact on the genetic makeup of the current population of the continent. A range of genetic analyses has been used to study both the ancient settlement of the continent and more recent history of population mixing. Here, I show how these two strands of research overlap and make use of results from other scientific disciplines to produce a fuller picture of the settlement of the continent at different time periods. The biological diversity of the Americas also provides prominent examples of the complex interaction between biological and social factors in constructing human identities and of the difficulties in defining human populations.
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Affiliation(s)
- Andrés Ruiz-Linares
- Department of Genetics, Evolution and Environment, University College London, London WC1E 6BT, United Kingdom
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22
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Abstract
A general introduction to the origins and history of Latin American populations is followed by a systematic review of the data from molecular autosomal assessments of the ethnic/continental (European, African, Amerindian) ancestries for 24 Latin American countries or territories. The data surveyed are of varying quality but provide a general picture of the present constitution of these populations. A brief discussion about the applications of these results (admixture mapping) is also provided. Latin American populations can be viewed as natural experiments for the investigation of unique anthropological and epidemiological issues.
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Affiliation(s)
- Francisco Mauro Salzano
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Mónica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
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23
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BRITO TAISC, POSSUELO LIAG, VALIM ANDREIAR, TODENDI PÂMELAF, RIBEIRO ANDREZZAW, GREGIANINI TATIANAS, JARCZEWSKI CARLAA, HUTZ MARAH, ROSSETTI MARIALUCIAR, ZAHA ARNALDO. Polymorphisms in CYP2E1, GSTM1 and GSTT1 and anti-tuberculosis drug-induced hepatotoxicity. AN ACAD BRAS CIENC 2014. [DOI: 10.1590/0001-3765201420130350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Anti-tuberculosis drug-induced hepatitis (ATD- induced hepatitis) has been linked to polymorphisms in genes encoding drug metabolizing enzymes. N-acetyltransferase 2 (NAT2), cytochrome P450 2E1 (CYP2E1) and glutathione S-transferase (loci GSTM1 and GSTT1) are involved in the metabolism of isoniazid, the most toxic drug for the treatment of tuberculosis (TB). This study was designed to determine the frequency and to evaluate whether polymorphisms at CYP2E1, GSTM1 and GSTT1 genes are associated with drug response, as well as to identify clinical risk factors for ATD-induced hepatitis. A total of 245 Brazilian patients undergoing treatment for TB were genotyped using polymerase chain reaction and restriction fragment length polymorphism and sequencing methods. The frequencies of the CYP2E1 polymorphic alleles RsaI, PstI and DraI are 8%, 8.5% and 12%, respectively. GSTM1 and GSTT1 genes are deleted in 42.9% and 12.4% of the population, respectively. Fifteen patients (6.1%) developed hepatotoxicity. Clinical (HIV, female sex and extrapulmonary TB) and genetic characteristics (CYP2E1 without any mutations, having NAT2 slow acetylator profile) are at higher risk of developing ATD-induced hepatitis in this population. Genotyping for GSTM1 and GSTT1 showed no influence on drug response.
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Affiliation(s)
- TAIS C. BRITO
- Universidade Federal do Rio Grande do Sul/UFRGS, Brasil
| | | | | | | | | | | | | | - MARA H. HUTZ
- Universidade Federal do Rio Grande do Sul/UFRGS, Brasil
| | | | - ARNALDO ZAHA
- Universidade Federal do Rio Grande do Sul, Brasil
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24
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Hong SB, Kim KC, Kim W. Mitochondrial DNA haplogroups and homogeneity in the Korean population. Genes Genomics 2014. [DOI: 10.1007/s13258-014-0194-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Kent M, Santos RV. "Os charruas vivem" nos Gaúchos: a vida social de uma pesquisa de "resgate" genético de uma etnia indígena extinta no Sul do Brasil. HORIZONTES ANTROPOLÓGICOS 2012. [DOI: 10.1590/s0104-71832012000100015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Este artigo explora a articulação entre uma pesquisa de ancestralidade genética e a construção social de identidades étnicas no Rio Grande do Sul. Isso é feito através da análise da vida social de um projeto de pesquisa conduzido por pesquisadores da Universidade Federal do Rio Grande do Sul (UFRGS). Tal investigação estabeleceu a continuidade genética entre a população Gaúcha contemporânea e os presumidamente extintos Charrua, uma etnia indígena que vivia na região do Pampa do estado. Ao longo do desenvolvimento do projeto de pesquisa, a ideia de continuidade genética passou por diferentes configurações, a depender de contextos específicos, sendo afirmada com diferentes níveis de certeza. A presente análise enfoca as condições sociais e genéticas que possibilitaram o estabelecimento de tal continuidade, assim como a afirmação da especificidade genética dos Gaúchos. Finalmente, são explorados os impactos sociais dessa pesquisa, em particular as suas articulações com construções de uma identidade regional diferenciada.
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26
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Amorim CEG, Wang S, Marrero AR, Salzano FM, Ruiz-Linares A, Bortolini MC. X-chromosomal genetic diversity and linkage disequilibrium patterns in Amerindians and non-Amerindian populations. Am J Hum Biol 2011; 23:299-304. [PMID: 21294208 DOI: 10.1002/ajhb.21110] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Revised: 09/08/2010] [Accepted: 09/14/2010] [Indexed: 11/12/2022] Open
Affiliation(s)
- Carlos Eduardo G Amorim
- Programa de Pós-Graduação em Genética e Biologia Molecular and Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, 91501-970, Porto Alegre, RS, Brazil
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27
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Resque RL, Freitas NDSDC, Rodrigues EMR, Guerreiro JF, Santos NPCD, Ribeiro dos Santos A, Zago MA, Santos S. Estimates of interethnic admixture in the Brazilian population using a panel of 24 X-linked insertion/deletion markers. Am J Hum Biol 2011; 22:849-52. [PMID: 20865761 DOI: 10.1002/ajhb.21089] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES In this study, we aimed to identify ancestry informative haplotypes and make interethnic admixture estimates using X-chromosome markers. METHODS A significant sample (461 individuals) of European, African, and Native American populations was analyzed, and four linkage groups were identified. The data obtained were used to describe the ancestral contribution of populations from four different geographical regions of Brazil (745 individuals). RESULTS The global interethnic admixture estimates of the four mixed populations under investigation were calculated applying all the 24 insertion/deletion (INDEL) markers. In the North region, a larger Native Americans ancestry was observed (42%). The Northeast and Southeast regions had smaller Native American contribution (27% in both of them). In the South region, there was a large European contribution (46%). CONCLUSIONS The estimates obtained are compatible with expectations for a colonization model with biased admixture between European men (one X chromosome) and Native American and African women (two X chromosomes), so the 24 X-INDEL panel described here can be a useful to make admixture interethnic estimates in Brazilian populations.
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Affiliation(s)
- Rafael Lima Resque
- Laboratório de Genética Humana e Médica, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Para, Brazil
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Hünemeier T, Ruiz-Linares A, Silveira Á, Paixão-Côrtes VR, Salzano FM, Bortolini MC. Brief communication: Population data support the adaptive nature of HACNS1 sapiens/neandertal-chimpanzee differences in a limb expression domain. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2010; 143:478-81. [DOI: 10.1002/ajpa.21378] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Colloquium paper: genome-wide patterns of population structure and admixture among Hispanic/Latino populations. Proc Natl Acad Sci U S A 2010; 107 Suppl 2:8954-61. [PMID: 20445096 DOI: 10.1073/pnas.0914618107] [Citation(s) in RCA: 289] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Hispanic/Latino populations possess a complex genetic structure that reflects recent admixture among and potentially ancient substructure within Native American, European, and West African source populations. Here, we quantify genome-wide patterns of SNP and haplotype variation among 100 individuals with ancestry from Ecuador, Colombia, Puerto Rico, and the Dominican Republic genotyped on the Illumina 610-Quad arrays and 112 Mexicans genotyped on Affymetrix 500K platform. Intersecting these data with previously collected high-density SNP data from 4,305 individuals, we use principal component analysis and clustering methods FRAPPE and STRUCTURE to investigate genome-wide patterns of African, European, and Native American population structure within and among Hispanic/Latino populations. Comparing autosomal, X and Y chromosome, and mtDNA variation, we find evidence of a significant sex bias in admixture proportions consistent with disproportionate contribution of European male and Native American female ancestry to present-day populations. We also find that patterns of linkage-disequilibria in admixed Hispanic/Latino populations are largely affected by the admixture dynamics of the populations, with faster decay of LD in populations of higher African ancestry. Finally, using the locus-specific ancestry inference method LAMP, we reconstruct fine-scale chromosomal patterns of admixture. We document moderate power to differentiate among potential subcontinental source populations within the Native American, European, and African segments of the admixed Hispanic/Latino genomes. Our results suggest future genome-wide association scans in Hispanic/Latino populations may require correction for local genomic ancestry at a subcontinental scale when associating differences in the genome with disease risk, progression, and drug efficacy, as well as for admixture mapping.
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Da Luz J, Kimura EM, Costa FF, Sonati MDF, Sans M. Beta-globin gene cluster haplotypes in Afro-Uruguayans from two geographical regions (South and North). Am J Hum Biol 2010; 22:124-8. [PMID: 19533614 DOI: 10.1002/ajhb.20961] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The beta-globin gene cluster haplotypes were identified in 52 and 40 chromosomes from two Afro-Uruguayan populations located in the South and North of the country, respectively. In both regions, the 5' haplotype 2 (+ - - - -), characteristic of non-African populations, was the most frequent, reflecting a strong process of admixture in Afro-Uruguayans (0.355 and 0.262, respectively). The haplotypes 3 (- - - - +) and 4 (- + - - +), characteristics of African sub-Saharan populations, present inverse frequencies in North and South: whereas in the South haplotype 3 is the second most frequent (0.232), and haplotype 4 presents a low frequency (0.019), in the North haplotype 4 is the third most frequent (0.140), and haplotype 3 only reaches an intermediate frequency (0.088). The pairwise F(ST) and the exact test of differentiation show genetic heterogeneity between both regions. Nei's genetic distance show that South and North present affinities with Bantu groups, although the North present the smallest genetic distance with the Mandenka, a Senegalese population. With respect to 3' haplotypes, haplotype I was the most frequent in both populations, followed by haplotype II, characteristic of sub-Saharan Africans. The high frequencies of haplotype III-Asian could indicate admixture with Native American populations. The differences observed between both Uruguayan regions could be explained by microevolutionary events as genetic drift, founder effects, differential admixture, and/or distinct origin of the African slaves introduced in those regions.
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Affiliation(s)
- Julio Da Luz
- Departamento de Genética, Universidad de la República, Montevideo, Uruguay
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Carnese FR, Mendisco F, Keyser C, Dejean CB, Dugoujon JM, Bravi CM, Ludes B, Crubézy E. Paleogenetical study of pre-Columbian samples from Pampa Grande (Salta, Argentina). AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2009; 141:452-62. [DOI: 10.1002/ajpa.21165] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ribeiro-Rodrigues EM, dos Santos NPC, dos Santos AKCR, Pereira R, Amorim A, Gusmão L, Zago MA, dos Santos SEB. Assessing interethnic admixture using an X-linked insertion-deletion multiplex. Am J Hum Biol 2009; 21:707-9. [PMID: 19533621 DOI: 10.1002/ajhb.20950] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
In this study, a PCR multiplex was optimized, allowing the simultaneous analysis of 13 X-chromosome Insertion/deletion polymorphisms (INDELs). Genetic variation observed in Africans, Europeans, and Native Americans reveals high inter-population variability. The estimated proportions of X-chromosomes in an admixed population from the Brazilian Amazon region show a predominant Amerindian contribution (approximately 41%), followed by European (approximately 32%) and African (approximately 27%) contributions. The proportion of Amerindian contribution based on X-linked data is similar to the expected value based on mtDNA and Y-chromosome information. The accuracy for assessing interethnic admixture, and the high differentiation between African, European, and Native American populations, demonstrates the suitability of this INDEL set to measure ancestry proportions in three-hybrid populations, as it is the case of Latin American populations.
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Affiliation(s)
- Elzemar Martins Ribeiro-Rodrigues
- Laboratório de Genética Humana e Médica, Departamento de Patologia, Universidade Federal do Pará, CEP: 66075-970 Belém, Pará, Brazil
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Mazières S, Sevin A, Callegari-Jacques SM, Crubézy E, Larrouy G, Dugoujon JM, Salzano FM. Population genetic dynamics in the French Guiana region. Am J Hum Biol 2009; 21:113-7. [PMID: 18942716 DOI: 10.1002/ajhb.20835] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Three sets of genetic markers (blood group plus protein polymorphisms, mitochondrial DNA, and Y-chromosome) were compared in four French Guiana and one Brazilian Amerindian populations. Spearman's rank correlation coefficient between five gene diversity statistics and historical or present-day population sizes showed significant values, indicating loss of diversity due to population bottlenecks. The three sets of markers furnished distinct admixture estimates, and the blood group plus protein polymorphisms could have overestimated the European contribution to their gene pool. Correspondence analysis distinguished the coastal from the interior populations, possibly reflecting past migration events.
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Affiliation(s)
- Stéphane Mazières
- Laboratoire d'Anthropobiologie, FRE 2960 CNRS, Faculté de Médecine, Toulouse, France.
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Ancestral origin of the ATTCT repeat expansion in spinocerebellar ataxia type 10 (SCA10). PLoS One 2009; 4:e4553. [PMID: 19234597 PMCID: PMC2639644 DOI: 10.1371/journal.pone.0004553] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2008] [Accepted: 01/05/2009] [Indexed: 12/04/2022] Open
Abstract
Spinocerebellar ataxia type 10 (SCA10) is an autosomal dominant neurodegenerative disease characterized by cerebellar ataxia and seizures. The disease is caused by a large ATTCT repeat expansion in the ATXN10 gene. The first families reported with SCA10 were of Mexican origin, but the disease was soon after described in Brazilian families of mixed Portuguese and Amerindian ancestry. The origin of the SCA10 expansion and a possible founder effect that would account for its geographical distribution have been the source of speculation over the last years. To unravel the mutational origin and spread of the SCA10 expansion, we performed an extensive haplotype study, using closely linked STR markers and intragenic SNPs, in families from Brazil and Mexico. Our results showed (1) a shared disease haplotype for all Brazilian and one of the Mexican families, and (2) closely-related haplotypes for the additional SCA10 Mexican families; (3) little or null genetic distance in small normal alleles of different repeat sizes, from the same SNP lineage, indicating that they are being originated by a single step mechanism; and (4) a shared haplotype for pure and interrupted expanded alleles, pointing to a gene conversion model for its generation. In conclusion, we show evidence for an ancestral common origin for SCA10 in Latin America, which might have arisen in an ancestral Amerindian population and later have been spread into the mixed populations of Mexico and Brazil.
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Jin HJ, Tyler-Smith C, Kim W. The peopling of Korea revealed by analyses of mitochondrial DNA and Y-chromosomal markers. PLoS One 2009; 4:e4210. [PMID: 19148289 PMCID: PMC2615218 DOI: 10.1371/journal.pone.0004210] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2008] [Accepted: 12/08/2008] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The Koreans are generally considered a northeast Asian group because of their geographical location. However, recent findings from Y chromosome studies showed that the Korean population contains lineages from both southern and northern parts of East Asia. To understand the genetic history and relationships of Korea more fully, additional data and analyses are necessary. METHODOLOGY AND RESULTS We analyzed mitochondrial DNA (mtDNA) sequence variation in the hypervariable segments I and II (HVS-I and HVS-II) and haplogroup-specific mutations in coding regions in 445 individuals from seven east Asian populations (Korean, Korean-Chinese, Mongolian, Manchurian, Han (Beijing), Vietnamese and Thais). In addition, published mtDNA haplogroup data (N = 3307), mtDNA HVS-I sequences (N = 2313), Y chromosome haplogroup data (N = 1697) and Y chromosome STR data (N = 2713) were analyzed to elucidate the genetic structure of East Asian populations. All the mtDNA profiles studied here were classified into subsets of haplogroups common in East Asia, with just two exceptions. In general, the Korean mtDNA profiles revealed similarities to other northeastern Asian populations through analysis of individual haplogroup distributions, genetic distances between populations or an analysis of molecular variance, although a minor southern contribution was also suggested. Reanalysis of Y-chromosomal data confirmed both the overall similarity to other northeastern populations, and also a larger paternal contribution from southeastern populations. CONCLUSION The present work provides evidence that peopling of Korea can be seen as a complex process, interpreted as an early northern Asian settlement with at least one subsequent male-biased southern-to-northern migration, possibly associated with the spread of rice agriculture.
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Affiliation(s)
- Han-Jun Jin
- Department of Biological Sciences, Dankook University, Cheonan, Korea
- The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Chris Tyler-Smith
- The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Wook Kim
- Department of Biological Sciences, Dankook University, Cheonan, Korea
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Guerreiro-Junior V, Bisso-Machado R, Marrero A, Hünemeier T, Salzano FM, Bortolini MC. Genetic signatures of parental contribution in black and white populations in Brazil. Genet Mol Biol 2009; 32:1-11. [PMID: 21637639 PMCID: PMC3032968 DOI: 10.1590/s1415-47572009005000001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 05/14/2008] [Indexed: 12/02/2022] Open
Abstract
Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the 13 markers indicated above in 54 of 107 black subjects previously investigated in this southern Brazilian population. The prevalence of Y-chromosome haplogroups among whites was similar to that found in the Azores (Portugal) or Spain, but not to that of other European countries. About half of the European or African mtDNA haplogroups of these individuals were related to their places of origin, but not their Amerindian counterparts. Persons classified in these two categories of skin color and related morphological traits showed distinct genomic ancestries through the country. These findings emphasize the need to consider in Brazil, despite some general trends, a notable heterogeneity in the pattern of admixture dynamics within and between populations/groups.
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Affiliation(s)
- Vanderlei Guerreiro-Junior
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS Brazil
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Wang S, Ray N, Rojas W, Parra MV, Bedoya G, Gallo C, Poletti G, Mazzotti G, Hill K, Hurtado AM, Camrena B, Nicolini H, Klitz W, Barrantes R, Molina JA, Freimer NB, Bortolini MC, Salzano FM, Petzl-Erler ML, Tsuneto LT, Dipierri JE, Alfaro EL, Bailliet G, Bianchi NO, Llop E, Rothhammer F, Excoffier L, Ruiz-Linares A. Geographic patterns of genome admixture in Latin American Mestizos. PLoS Genet 2008; 4:e1000037. [PMID: 18369456 PMCID: PMC2265669 DOI: 10.1371/journal.pgen.1000037] [Citation(s) in RCA: 303] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2007] [Accepted: 02/22/2008] [Indexed: 12/27/2022] Open
Abstract
The large and diverse population of Latin America is potentially a powerful resource for elucidating the genetic basis of complex traits through admixture mapping. However, no genome-wide characterization of admixture across Latin America has yet been attempted. Here, we report an analysis of admixture in thirteen Mestizo populations (i.e. in regions of mainly European and Native settlement) from seven countries in Latin America based on data for 678 autosomal and 29 X-chromosome microsatellites. We found extensive variation in Native American and European ancestry (and generally low levels of African ancestry) among populations and individuals, and evidence that admixture across Latin America has often involved predominantly European men and both Native and African women. An admixture analysis allowing for Native American population subdivision revealed a differentiation of the Native American ancestry amongst Mestizos. This observation is consistent with the genetic structure of pre-Columbian populations and with admixture having involved Natives from the area where the Mestizo examined are located. Our findings agree with available information on the demographic history of Latin America and have a number of implications for the design of association studies in population from the region. The history of Latin America has entailed a complex process of population mixture between Native and recent immigrants across a vast geographic region. Few details are known about this process or about how it has shaped the genetic makeup of contemporary Latin American populations. To perform a broad exploration of the genetic diversity of Latin America we carried out genome-wide analyses in 13 mestizo populations sampled from 7 countries across the region. We observe a marked variation in ancestry both within and between mestizo populations. This variation in ancestry correlates with pre-Columbian Native population density in the areas examined and with recent patterns of demographic growth of the sites sampled. We also find evidence that the mixture at the origin of these populations involved mainly immigrant European men and Native and African women. Finally, mestizo populations show a differentiated Amerindian genetic background, consistent with a predominantly local Native ancestry. Mestizos thus still reveal the genetic imprint of the pre-Columbian Native American population diversification. Our study helps delineate the genetic landscape of Latin America and has a number of implications for gene identification analyses in populations from the region.
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Affiliation(s)
- Sijia Wang
- The Galton Laboratory, Department of Biology, University College London, London, United Kingdom
| | - Nicolas Ray
- Computational and Molecular Population Genetics Laboratory, University of Bern, Bern, Switzerland
| | - Winston Rojas
- Laboratorio de Genética Molecular, Universidad de Antioquia, Medellín, Colombia
| | - Maria V. Parra
- Laboratorio de Genética Molecular, Universidad de Antioquia, Medellín, Colombia
| | - Gabriel Bedoya
- Laboratorio de Genética Molecular, Universidad de Antioquia, Medellín, Colombia
| | - Carla Gallo
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Giovanni Poletti
- Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Guido Mazzotti
- Facultad de Medicina, Universidad Peruana Cayetano Heredia, Lima, Perú
| | - Kim Hill
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America
| | - Ana M. Hurtado
- Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America
| | - Beatriz Camrena
- Departamento de Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, México D.F., México
| | - Humberto Nicolini
- Departamento de Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, México D.F., México
| | - William Klitz
- School of Public Health, University of California Berkeley, Berkeley, California, United States of America
- Public Health Institute, Oakland, California, United States of America
| | - Ramiro Barrantes
- Escuela de Biología, Universidad de Costa Rica, San José, Costa Rica
| | - Julio A. Molina
- Center for Neurobehavioral Genetics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Nelson B. Freimer
- Center for Neurobehavioral Genetics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Maria Cátira Bortolini
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Francisco M. Salzano
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | | | - Luiza T. Tsuneto
- Departamento de Genética, Universidade Federal do Paraná, Curitiba, Brazil
| | - José E. Dipierri
- Instituto de Biología de la Altura, Facultad de Humanidades y Ciencias Sociales, Universidad Nacional de Jujuy, San Salvador de Jujuy, Argentina
| | - Emma L. Alfaro
- Instituto de Biología de la Altura, Facultad de Humanidades y Ciencias Sociales, Universidad Nacional de Jujuy, San Salvador de Jujuy, Argentina
| | - Graciela Bailliet
- Laboratory of Human Molecular Population Genetics, IMBICE, La Plata, Argentina
| | - Nestor O. Bianchi
- Laboratory of Human Molecular Population Genetics, IMBICE, La Plata, Argentina
| | - Elena Llop
- Programa de Genética Humana, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Francisco Rothhammer
- Programa de Genética Humana, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile
| | - Laurent Excoffier
- Computational and Molecular Population Genetics Laboratory, University of Bern, Bern, Switzerland
| | - Andrés Ruiz-Linares
- The Galton Laboratory, Department of Biology, University College London, London, United Kingdom
- * E-mail:
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Mazières S, Guitard E, Crubézy E, Dugoujon JM, Bortolini MC, Bonatto SL, Hutz MH, Bois E, Tiouka F, Larrouy G, Salzano FM. Uniparental (mtDNA, Y-chromosome) polymorphisms in French Guiana and two related populations--implications for the region's colonization. Ann Hum Genet 2007; 72:145-56. [PMID: 17725814 DOI: 10.1111/j.1469-1809.2007.00392.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Blood samples collected in four Amerindian French Guiana populations (Palikur, Emerillon, Wayampi and Kali'na) in the early 1980s were screened for selected mtDNA and Y-chromosome length polymorphisms, and sequenced for the mtDNA hypervariable segment I (HVS-I). In addition, two other Amerindian populations (Apalaí and Matsiguenga) were examined for the same markers to establish the genetic relationships in the area. Strong dissimilarities were observed in the distribution of the founding Amerindian haplogroups, and significant p-values were obtained from F(ST) genetic distances. Interpopulation similarities occurred mainly due to geography. The Palikur did not show obvious genetic similarity to the Matsiguenga, who speak the same language and live in a region from where they could have migrated to French Guiana. The African-origin admixture observed in the Kali'na probably derives from historical contacts they had with the Bushinengue (Noir Marron), a group of escaped slaves who now lead independent lives in a nearby region. This analysis has identified significant clues about the Amerindian peopling of the North-East Amazonian region.
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Affiliation(s)
- S Mazières
- Laboratoire d'Anthropobiologie, FRE 2960 CNRS, Toulouse, France.
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