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Ben Saad H. Do Tunisians have a European ancestry? Eur Respir J 2021; 58:58/1/2100761. [PMID: 34244302 DOI: 10.1183/13993003.00761-2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 04/11/2021] [Indexed: 11/05/2022]
Affiliation(s)
- Helmi Ben Saad
- Université de Sousse, Faculté de Médecine de Sousse, Hôpital Farhat HACHED de Sousse, Laboratoire de Recherche 'insuffisance cardiaque' (LR12SP09), Sousse, Tunisia
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2
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Wu H, Wan S, Qu M, Ren B, Liu L, Shen H. The Relationship between PTPN22 R620W Polymorphisms and the Susceptibility to Autoimmune Thyroid Diseases: An Updated Meta-analysis. Immunol Invest 2020; 51:438-451. [PMID: 33103521 DOI: 10.1080/08820139.2020.1837154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The protein tyrosine phosphatase non-receptor 22 (PTPN22) R620W polymorphism has been related to susceptibility to autoimmune thyroid disease (AITD) with inconsistent results. Therefore, this meta-analysis was designed to assess a more accurate association between the PTPN22 R620W polymorphism and AITD susceptibility. A systematic search of the EMBASE, PubMed, Web of Science, CBM, CNKI, and WanFang databases was performed to determine relevant publications. Statistical analyses of the odds ratios (ORs), 95% confidence intervals (CIs), and p values were performed using STATA software. Our meta-analysis included 18 separate studies comprised of 4,726 cases and 4,220 controls. In the allele and all genetic models, PTPN22 R620W polymorphism and Graves' disease (GD) (allele model TvsC: OR = 1.573; 95% CI = 1.378-1.795; P < .001) and Hashimoto's thyroiditis (HT) (allele model TvsC: OR = 1.737; 95% CI = 1.230-2.454; P = .002) susceptibility was positively associated. A racial subgroup analysis showed that the T allele significantly increased AITD susceptibility in all genetic models involving Caucasians, but not in Asians. This meta-analysis showed that the PTPN22 R620W polymorphism is associated with the risk of GD and HT in the overall study population. In addition, the PTPN22 R620W polymorphism is associated with elevated AITD risk in Caucasians, but not in Asians.
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Affiliation(s)
- Huaiyong Wu
- Centre for Endemic Disease Control, Chinese Centre for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
| | - Siyuan Wan
- Centre for Endemic Disease Control, Chinese Centre for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China.,Department of Preventive Medicine, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Mengying Qu
- Centre for Endemic Disease Control, Chinese Centre for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
| | - Bingxuan Ren
- Centre for Endemic Disease Control, Chinese Centre for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
| | - Lixiang Liu
- Centre for Endemic Disease Control, Chinese Centre for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
| | - Hongmei Shen
- Centre for Endemic Disease Control, Chinese Centre for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
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3
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Di Santo Meztler GP, Del Palacio S, Esteban ME, Armoa I, Argüelles CF, Catanesi CI. Genetic Differentiation of North-East Argentina Populations Based on 30 Binary X Chromosome Markers. Front Genet 2018; 9:208. [PMID: 29951085 PMCID: PMC6008373 DOI: 10.3389/fgene.2018.00208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 05/24/2018] [Indexed: 01/21/2023] Open
Abstract
Alu insertions, INDELs, and SNPs in the X chromosome can be useful not only for revealing relationships among populations but also for identification purposes. We present data of 10 Alu insertions, 5 INDELs, and 15 SNPs of X-chromosome from three Argentinian north-east cities in order to gain insight into the genetic diversity of the X chromosome within this region of the country. Data from 198 unrelated individuals belonging to Posadas, Corrientes, and Eldorado cities were genotyped for Ya5DP62, Yb8DP49, Ya5DP3, Ya5NBC37, Ya5DP77, Ya5NBC491, Ya5DP4, Ya5DP13, Yb8NBC634, and Yb8NBC102 Alu insertions, for MID193, MID1705, MID3754, MID3756 and MID1540 Indels and for rs6639398, rs5986751, rs5964206, rs9781645, rs2209420, rs1299087, rs318173, rs933315, rs1991961, rs4825889, rs1781116, rs1937193, rs1781104, rs149910, and rs652 SNPs. No deviations from Hardy-Weinberg equilibrium were observed for Posadas and Corrientes. However, Eldorado showed significant values, and it was found to have an internal substructuring with two groups of different origin, one showing higher similarity with European countries, and the other with more similarities to Posadas and Corrientes. Fst pairwise genetic distances emerged for some markers among the studied populations and also between our data and those from other countries and continents. Of particular interest, Alu insertions demonstrated the most differences, and could be of use in ancestry studies for these populations, while INDELs and SNPs variation were informative for differentiation within the country.
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Affiliation(s)
- Gabriela P Di Santo Meztler
- Laboratorio de Diversidad Genética, IMBICE, CICPBA-Consejo Nacional de Investigaciones Científicas y Técnicas, La Plata, Argentina
| | - Santiago Del Palacio
- Instituto Argentino de Radioastronomía, CCT-La Plata, Consejo Nacional de Investigaciones Científicas y Técnicas, CICPBA, Villa Elisa, Argentina
| | - María E Esteban
- Secció de Zoologia i Antropologia Biológica, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain.,Institut de Recerca de la Biodiversitat, Universitat de Barcelona, Barcelona, Spain
| | - Isaías Armoa
- Dirección de Desarrollo e Integración Regional Municipalidad de Eldorado, Misiones, Argentina
| | - Carina F Argüelles
- LACyGH-GIGA, Instituto de Biología Subtropical, nodo Posadas-Dpto. de Genética-FCEQyN UNaM-Consejo Nacional de Investigaciones Científicas y Técnicas, Posadas, Argentina
| | - Cecilia I Catanesi
- Laboratorio de Diversidad Genética, IMBICE, CICPBA-Consejo Nacional de Investigaciones Científicas y Técnicas, La Plata, Argentina.,Cátedra de Genética, Facultad de Cs. Naturales y Museo, UNLP, La Plata, Argentina
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Genetic portrait of Jewish populations based on three sets of X-chromosome markers: Indels, Alu insertions and STRs. Forensic Sci Int Genet 2017; 31:e5-e11. [DOI: 10.1016/j.fsigen.2017.09.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/25/2017] [Accepted: 09/12/2017] [Indexed: 12/19/2022]
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5
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Navarrete HP, Soler LH, Mares RE, Ramos MA. Frequency of Alu insertions within the ACE and PR loci in Northwestern Mexicans. BMC Res Notes 2017; 10:339. [PMID: 28750672 PMCID: PMC5530943 DOI: 10.1186/s13104-017-2673-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 07/22/2017] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE Presently, non-LTR retrotransposons are the most active mobile elements in the human genome. Among these, Alu elements are highly represented in the modern population. Worldwide, distribution of Alu polymorphisms (insertion/deletion; I/D) shows variability between different populations. Two Alu insertion loci, ACE and PR, are significant biomarkers that have served in several genotype-phenotype association studies. In Mexico, studies concerning the frequency of these biomarkers have been conducted mainly in subpopulations from central and southern regions. Here, we screened a population sample of the northwestern region to gain further knowledge regarding the prevalence of Alu polymorphisms within ACE and PR loci. RESULTS For ACE locus, the observed genotype frequencies were 26.5, 51.0 and 22.5% for II, ID, and DD, respectively; and allelic frequencies for I and D were 52 and 48%. Whereas respective genotype frequencies for PR locus were 2.7, 26.5 and 70.8%, and the corresponding allele frequencies were 16 and 84%. Furthermore, the insertion frequency within ACE locus was similar between central, western and northwestern subpopulations, and rather higher in southeastern subpopulation (p < 0.05). Although the occurrence of Alu polymorphisms within PR locus has not been widely examined, the insertion frequency was higher in northwestern subpopulation, as compared with western and southeastern subpopulations (p < 0.05). Based on the frequency of Alu insertions found in ACE and PR loci, subpopulations from the northwestern, western and central regions share a common genetic origin, but apparently not with the subpopulation from the southeastern region, in accordance with the notion that assumes the existence of a broad genomic diversity in the Mexican population. In addition, the high prevalence of Alu insertions reveals their potential application as biomarkers with prognostic value for the associated diseases; e.g., as part of the standard protocols for clinical diagnosis.
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Affiliation(s)
- Hilda P Navarrete
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, 22390, Tijuana, BCN, Mexico
| | - Linda H Soler
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, 22390, Tijuana, BCN, Mexico
| | - Rosa E Mares
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, 22390, Tijuana, BCN, Mexico
| | - Marco A Ramos
- Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Calzada Universidad 14418, Parque Industrial Internacional, 22390, Tijuana, BCN, Mexico.
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Zanetti D, Sadiq M, Carreras-Torres R, Khabour O, Alkaraki A, Esteban E, Via M, Moral P. Human diversity in Jordan: polymorphic Alu insertions in general Jordanian and Bedouin groups. Hum Biol 2015; 86:131-8. [PMID: 25397703 DOI: 10.3378/027.086.0201] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2014] [Indexed: 11/05/2022]
Abstract
Jordan, located in the Levant region, is an area crucial for the investigation of human migration between Africa and Eurasia. However, the genetic history of Jordanians has yet to be clarified, including the origin of the Bedouins today resident in Jordan. Here, we provide new genetic data on autosomal independent markers in two Jordanian population samples (Bedouins and the general population) to begin to examine the genetic diversity inside this country and to provide new information about the genetic position of these populations in the context of the Mediterranean and Middle East area. The markers analyzed were 18 Alu polymorphic insertions characterized by their identity by descent, known ancestral state (lack of insertion), and apparent selective neutrality. The results indicate significant genetic diffferences between Bedouins and general Jordanians (p = 0.038). Whereas Bedouins show a close genetic proximity to North Africans, general Jordanians appear genetically more similar to other Middle East populations. In general, these data are consistent with the hypothesis that Bedouins had an important role in the peopling of Jordan and constitute the original substrate of the current population. However, migration into Jordan in recent years likely has contributed to the diversity among current Jordanian population groups.
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Affiliation(s)
- Daniela Zanetti
- Department of Animal Biology-Anthropology, University of Barcelona, Barcelona, Spain
| | - May Sadiq
- Department of Biological Sciences, Yarmouk University, Irbid, Jordan
| | | | - Omar Khabour
- Department of Medical Laboratory Sciences, Jordan University of Science and Technology, Irbid, Jordan, and Department of Biology, Faculty of Science, Taibah University, Saudi Arabia
| | | | - Esther Esteban
- Department of Animal Biology-Anthropology, University of Barcelona, Barcelona, Spain
| | - Marc Via
- Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Barcelona, Spain
| | - Pedro Moral
- Department of Animal Biology-Anthropology, University of Barcelona, Barcelona, Spain
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Ben Halim N, Dorboz I, Kefi R, Kharrat N, Eymard-Pierre E, Nagara M, Romdhane L, Ben Alaya-Bouafif N, Rebai A, Miladi N, Boespflug-Tanguy O, Abdelhak S. Determination of arylsulfatase A pseudodeficiency allele and haplotype frequency in the Tunisian population. Neurol Sci 2015; 37:403-9. [PMID: 26577183 DOI: 10.1007/s10072-015-2417-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/02/2015] [Indexed: 01/09/2023]
Abstract
Arylsulfatase A (ASA) is a lysosomal enzyme involved in the catabolism of cerebroside sulfate. ASA deficiency is associated with metachromatic leukodystrophy (MLD). Low ASA activities have also been reported in a more common condition with no apparent clinical consequences termed ASA pseudo-deficiency (ASA-PD) which is associated with two linked mutations in the ASA gene (c.1049A>G and c.*96A>G). This study aimed to investigate the frequency of the two ASA-PD variants and their linkage disequilibrium (LD) among Tunisians. ASA-PD variants were detected in 129 healthy Tunisians and their frequencies were compared to those described worldwide. The frequency of the PD allele was estimated at 17.4% for the overall sample, with c.1049A>G and c.*96A>G frequencies of 25.6 and 17.4%, respectively. This study also revealed a high LD between the two ASA-PD variants (r(2) = 0.61). Inter-population analysis revealed similarities in the ASA-PD genetic structure between Tunisians and populations from Middle East with c.*96A>G frequencies being the highest in the world. A significant North vs. South genetic differentiation in the ASA-PD frequency was also observed in Tunisian population who seems genetically intermediate between Africans, Middle-Easterners and Europeans. This is the first report on the allele frequency of the ASA-PD in North Africa, revealing a relatively high frequency of the PD allele among Tunisians. This study gives also evidence on the importance of discriminating ASA-PD allele from pathological mutations causing MLD and supporting enzymatic activity testing with both sulfatiduria determination and genetic testing in the differential diagnosis of MLD in the Tunisian population.
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Affiliation(s)
- Nizar Ben Halim
- Laboratoire de Génomique Biomédicale et Oncogénétique, Institut Pasteur de Tunis, BP 74, 13 Place Pasteur, 1002, Tunis, Belvédère, Tunisia.
| | - Imen Dorboz
- Child Neurological Diseases Unit, Faculty of Medicine, 1007, Tunis, Tunisia.,INSERM U676, 75935, Paris Cedex 19, France
| | - Rym Kefi
- Laboratoire de Génomique Biomédicale et Oncogénétique, Institut Pasteur de Tunis, BP 74, 13 Place Pasteur, 1002, Tunis, Belvédère, Tunisia
| | - Najla Kharrat
- Bioinformatics Unit, Centre of Biotechnology of Sfax, 3018, Sfax, Tunisia
| | - Eleonore Eymard-Pierre
- Faculté de Médecine, INSERM UMR 931, GReD, 63000, Clermont-Ferrand, France.,Department of Genetics and Cytogenetics, CHU de Clermont-Ferrand, 63003, Clermont-Ferrand Cedax 1, France
| | - Majdi Nagara
- Laboratoire de Génomique Biomédicale et Oncogénétique, Institut Pasteur de Tunis, BP 74, 13 Place Pasteur, 1002, Tunis, Belvédère, Tunisia
| | - Lilia Romdhane
- Laboratoire de Génomique Biomédicale et Oncogénétique, Institut Pasteur de Tunis, BP 74, 13 Place Pasteur, 1002, Tunis, Belvédère, Tunisia
| | | | - Ahmed Rebai
- Bioinformatics Unit, Centre of Biotechnology of Sfax, 3018, Sfax, Tunisia
| | - Najoua Miladi
- Child Neurological Diseases Unit, Faculty of Medicine, 1007, Tunis, Tunisia
| | - Odile Boespflug-Tanguy
- INSERM U676, 75935, Paris Cedex 19, France.,Assistance Publique des Hôpitaux de Paris (APHP), Centre de Reference « leucodystrophies », Hôpital Robert Debré, 75019, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, 75205, Paris Cedex 13, France
| | - Sonia Abdelhak
- Laboratoire de Génomique Biomédicale et Oncogénétique, Institut Pasteur de Tunis, BP 74, 13 Place Pasteur, 1002, Tunis, Belvédère, Tunisia
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Ouchari M, Romdhane H, Chakroun T, Abdelkefi S, Jarrey I, Houissa B, Jemni Yacoub S. The Duffy blood group system in the Tunisian population. Transfus Clin Biol 2015; 22:76-9. [PMID: 25936942 DOI: 10.1016/j.tracli.2015.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 03/20/2015] [Indexed: 11/17/2022]
Abstract
BACKGROUND Tunisia was described to as genetically heterogenous. Besides the 1% native Berber, the genetically influence of the Europeans seems much larger than that of sub-Saharan populations. Due to their ethnic variability, blood group variants have the potential to support population analyses. The aim of this study was to estimate the Duffy blood group system in this mixed population with enhanced characterization of samples with aberrant expression. MATERIALS AND METHODS Standard serological testing for the Duffy antigen was done for 105 Tunisian blood donors. Samples with altered Fy expression underwent DNA sequencing of the DARC, RHD and RHCE genes. RESULTS The Fy(a-b+) was the most common phenotype identified in the Tunisian population (38.1%). Five samples with Fy(a-b-) phenotype were determined as FY*02N.01/FY*02N.01 by a homozygous occurrence of the FY*B-67C>T alteration. Another three individuals exhibited a Fy(b+(w))Fy(x) expression, confirmed by a FY*A/FY*02M.01 (n = 1) and a FY*02M.01/FY*02M.01 (n = 2) genotype. RHD and RHCE sequencing (n= 8) revealed altered alleles observed in black populations in 5 samples. One individual with FY*02M.01/FY*02M.01 have the silent 165C>T nucleotide substitution each in the RHD and RHCE gene. DISCUSSION The composition of blood group variants determined in this study confirms the genetically proximity of Tunisia to Europe. The small sub-Saharan genetic influence was approved by a limited number of variant samples associated with the black population.
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Affiliation(s)
- M Ouchari
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia
| | - H Romdhane
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia
| | - T Chakroun
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia
| | - S Abdelkefi
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia
| | - I Jarrey
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia
| | - B Houissa
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia
| | - S Jemni Yacoub
- Centre régional de transfusion sanguine, hôpital Farhat Hached, Sousse, Tunisia.
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Salem AH, Bahri R, Jarjanazi H, Chaabani H. Geographical and social influences on genetic diversity within the Egyptian population: analyses ofAluinsertion polymorphisms. Ann Hum Biol 2013; 41:61-6. [DOI: 10.3109/03014460.2013.826734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bentayebi K, Ramon M, Castro J, Barbaro A, Bouabdeallah M, Amzazi S, Picornell A. Inferring ethnicity from the X-chromosome ALU insertions: Data from Western Mediterranean human groups. FORENSIC SCIENCE INTERNATIONAL GENETICS SUPPLEMENT SERIES 2011. [DOI: 10.1016/j.fsigss.2011.08.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Gayà-Vidal M, Dugoujon JM, Esteban E, Athanasiadis G, Rodríguez A, Villena M, Vasquez R, Moral P. Autosomal and X chromosome Alu insertions in Bolivian Aymaras and Quechuas: two languages and one genetic pool. Am J Hum Biol 2010; 22:154-62. [PMID: 19593738 DOI: 10.1002/ajhb.20967] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Thirty-two polymorphic Alu insertions (18 autosomal and 14 from the X chromosome) were studied in 192 individuals from two Amerindian populations of the Bolivian Altiplano (Aymara and Quechua speakers: the two main Andean linguistic groups), to provide relevant information about their genetic relationships and demographic processes. The main objective was to determine from genetic data whether the expansion of the Quechua language into Bolivia could be associated with demographic (Inca migration of Quechua-speakers from Peru into Bolivia) or cultural (language imposition by the Inca Empire) processes. Allele frequencies were used to assess the genetic relationships between these two linguistic groups. Our results indicated that the two Bolivian samples showed a high genetic similarity for both sets of markers and were clearly differentiated from the two Peruvian Quechua samples available in the literature. Additionally, our data were compared with the available literature to determine the genetic and linguistic structure, and East-West differentiation in South America. The close genetic relationship between the two Bolivian samples and their differentiation from the Quechua-speakers from Peru suggests that the Quechua language expansion in Bolivia took place without any important demographic contribution. Moreover, no clear geographical or linguistic structure was found for the Alu variation among South Amerindians.
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Affiliation(s)
- Magdalena Gayà-Vidal
- Unitat d'Antropologia, Biologia Animal, Universitat de Barcelona, Barcelona, Spain
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Athanasiadis G, González-Pérez E, Esteban E, Dugoujon JM, Stoneking M, Moral P. The Mediterranean Sea as a barrier to gene flow: evidence from variation in and around the F7 and F12 genomic regions. BMC Evol Biol 2010; 10:84. [PMID: 20346176 PMCID: PMC2853540 DOI: 10.1186/1471-2148-10-84] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 03/27/2010] [Indexed: 11/30/2022] Open
Abstract
Background The Mediterranean has a long history of interactions among different peoples. In this study, we investigate the genetic relationships among thirteen population samples from the broader Mediterranean region together with three other groups from the Ivory Coast and Bolivia with a particular focus on the genetic structure between North Africa and South Europe. Analyses were carried out on a diverse set of neutral and functional polymorphisms located in and around the coagulation factor VII and XII genomic regions (F7 and F12). Results Principal component analysis revealed a significant clustering of the Mediterranean samples into North African and South European groups consistent with the results from the hierarchical AMOVA, which showed a low but significant differentiation between groups from the two shores. For the same range of geographic distances, populations from each side of the Mediterranean were found to differ genetically more than populations within the same side. To further investigate this differentiation, we carried out haplotype analyses, which provided partial evidence that sub-Saharan gene flow was higher towards North Africa than South Europe. Conclusions As there is no consensus between the two genomic regions regarding gene flow through the Sahara, it is hard to reach a solid conclusion about its role in the differentiation between the two Mediterranean shores and more data are necessary to reach a definite conclusion. However our data suggest that the Mediterranean Sea was at least partially a barrier to gene flow between the two shores.
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Affiliation(s)
- Georgios Athanasiadis
- Unitat d'Antropologia, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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Athanasiadis G, Esteban E, Gayà -Vidal M, Dugoujon JM, Moschonas N, Chaabani H, Bissar-Tadmouri N, Harich N, Stoneking M, Moral P. Different Evolutionary Histories of the Coagulation Factor VII Gene in Human Populations? Ann Hum Genet 2010; 74:34-45. [DOI: 10.1111/j.1469-1809.2009.00557.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tian W, Wang F, Cai JH, Li LX. Polymorphic insertions in 5 Alu loci within the major histocompatibility complex class I region and their linkage disequilibria with HLA alleles in four distinct populations in mainland China. ACTA ACUST UNITED AC 2008; 72:559-67. [DOI: 10.1111/j.1399-0039.2008.01152.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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