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Gaudin RGN, Figueiro G, Flores-Gutiérrez S, Mut P, Vega-Requena Y, Luna-Andrada L, Ackermann E, Hidalgo PC, Carracedo A, Torres M, Sans M. DNA polymorphisms associated with lactase persistence, self-perceived symptoms of lactose intolerance, milk and dairy consumption, and ancestry, in the Uruguayan population. Am J Hum Biol 2023; 35:e23868. [PMID: 36695417 DOI: 10.1002/ajhb.23868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 01/02/2023] [Accepted: 01/05/2023] [Indexed: 01/26/2023] Open
Abstract
Uruguay has one of the highest per capita milk intakes worldwide, even with a limited supply of lactose-free products; furthermore, the admixed nature of its population is well known, and various frequencies of lactase persistence (LP) are observed in the source populations. We aimed to contribute to the understanding of the relation between allelic variants associated with LP, milk consumption, digestive symptoms, and genetic ancestry in the Uruguayan population. Samples of saliva or peripheral blood were collected from 190 unrelated individuals from two regions of Uruguay, genotypes for polymorphic sites in a fragment within the LCT enhancer were determined and allelic frequencies calculated in all of them. Data were collected on frequency of milk and dairy consumption and self-reported symptoms in a subsample of 153 individuals. Biparental and maternal ancestry was determined by analyzing individual ancestry markers and mitochondrial DNA. Twenty-nine percentage of individuals reported symptoms attributed to the ingestion of fresh milk, with abdominal pain, bloating and flatulence being the most frequent. European LP-associated allele T-13910 showed a frequency of 33%, while other LP-associated alleles like G-13915 and T-14011 were observed in very low frequencies. Associations between self-reported symptoms, fresh milk intake, and C/T-13910 genotype were statistically significant. No evidence of association between genetic ancestry and C/T-13910 was found, although individuals carrying one T-13910 allele appeared to have more European ancestry. In conclusion, the main polymorphism capable of predicting lactose intolerance in Uruguayans is C/T-13910, although more studies are required to unravel the relation between genotype and lactase activity, especially in heterozygotes.
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Affiliation(s)
- Raúl Germán Negro Gaudin
- 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
| | - Sara Flores-Gutiérrez
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
| | - Patricia Mut
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
| | - Yasser Vega-Requena
- Polo de Desarrollo Universitario Diversidad Genética Humana, Centro Universitario Regional Noreste, Tacuarembó, Universidad de la República, Montevideo, Uruguay
| | - Lorena Luna-Andrada
- Polo de Desarrollo Universitario Diversidad Genética Humana, Centro Universitario Regional Noreste, Tacuarembó, Universidad de la República, Montevideo, Uruguay
| | - Elizabeth Ackermann
- Polo de Desarrollo Universitario Diversidad Genética Humana, Centro Universitario Regional Noreste, Tacuarembó, Universidad de la República, Montevideo, Uruguay
| | - Pedro C Hidalgo
- Polo de Desarrollo Universitario Diversidad Genética Humana, Centro Universitario Regional Noreste, Tacuarembó, Universidad de la República, Montevideo, Uruguay
| | - Angel Carracedo
- Grupo de Medicina Xenómica, Centro en Red de Enfermedades Raras (CIBERER), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Fundación Pública Galega de Medicina Xenómica (SERGAS)-CIBERER, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - María Torres
- Fundación Pública Galega de Medicina Xenómica (SERGAS)-CIBERER, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Mónica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
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De Oliveira TC, Secolin R, Lopes-Cendes I. A review of ancestrality and admixture in Latin America and the caribbean focusing on native American and African descendant populations. Front Genet 2023; 14:1091269. [PMID: 36741309 PMCID: PMC9893294 DOI: 10.3389/fgene.2023.1091269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 01/09/2023] [Indexed: 01/21/2023] Open
Abstract
Genomics can reveal essential features about the demographic evolution of a population that may not be apparent from historical elements. In recent years, there has been a significant increase in the number of studies applying genomic epidemiological approaches to understand the genetic structure and diversity of human populations in the context of demographic history and for implementing precision medicine. These efforts have traditionally been applied predominantly to populations of European origin. More recently, initiatives in the United States and Africa are including more diverse populations, establishing new horizons for research in human populations with African and/or Native ancestries. Still, even in the most recent projects, the under-representation of genomic data from Latin America and the Caribbean (LAC) is remarkable. In addition, because the region presents the most recent global miscegenation, genomics data from LAC may add relevant information to understand population admixture better. Admixture in LAC started during the colonial period, in the 15th century, with intense miscegenation between European settlers, mainly from Portugal and Spain, with local indigenous and sub-Saharan Africans brought through the slave trade. Since, there are descendants of formerly enslaved and Native American populations in the LAC territory; they are considered vulnerable populations because of their history and current living conditions. In this context, studying LAC Native American and African descendant populations is important for several reasons. First, studying human populations from different origins makes it possible to understand the diversity of the human genome better. Second, it also has an immediate application to these populations, such as empowering communities with the knowledge of their ancestral origins. Furthermore, because knowledge of the population genomic structure is an essential requirement for implementing genomic medicine and precision health practices, population genomics studies may ensure that these communities have access to genomic information for risk assessment, prevention, and the delivery of optimized treatment; thus, helping to reduce inequalities in the Western Hemisphere. Hoping to set the stage for future studies, we review different aspects related to genetic and genomic research in vulnerable populations from LAC countries.
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Affiliation(s)
- Thais C. De Oliveira
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil,The Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
| | - Rodrigo Secolin
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil,The Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
| | - Iscia Lopes-Cendes
- Department of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil,The Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil,*Correspondence: Iscia Lopes-Cendes,
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Zavala VA, Casavilca-Zambrano S, Navarro-Vásquez J, Castañeda CA, Valencia G, Morante Z, Calderón M, Abugattas JE, Gómez H, Fuentes HA, Liendo-Picoaga R, Cotrina JM, Monge C, Neciosup SP, Huntsman S, Hu D, Sánchez SE, Williams MA, Núñez-Marrero A, Godoy L, Hechmer A, Olshen AB, Dutil J, Ziv E, Zabaleta J, Gelaye B, Vásquez J, Gálvez-Nino M, Enriquez-Vera D, Vidaurre T, Fejerman L. Association between Ancestry-Specific 6q25 Variants and Breast Cancer Subtypes in Peruvian Women. Cancer Epidemiol Biomarkers Prev 2022; 31:1602-1609. [PMID: 35654312 PMCID: PMC9662925 DOI: 10.1158/1055-9965.epi-22-0069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/07/2022] [Accepted: 05/23/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Breast cancer incidence in the United States is lower in Hispanic/Latina (H/L) compared with African American/Black or Non-Hispanic White women. An Indigenous American breast cancer-protective germline variant (rs140068132) has been reported near the estrogen receptor 1 gene. This study tests the association of rs140068132 and other polymorphisms in the 6q25 region with subtype-specific breast cancer risk in H/Ls of high Indigenous American ancestry. METHODS Genotypes were obtained for 5,094 Peruvian women with (1,755) and without (3,337) breast cancer. Associations between genotype and overall and subtype-specific risk for the protective variant were tested using logistic regression models and conditional analyses, including other risk-associated polymorphisms in the region. RESULTS We replicated the reported association between rs140068132 and breast cancer risk overall [odds ratio (OR), 0.53; 95% confidence interval (CI), 0.47-0.59], as well as the lower odds of developing hormone receptor negative (HR-) versus HR+ disease (OR, 0.77; 95% CI, 0.61-0.97). Models, including HER2, showed further heterogeneity with reduced odds for HR+HER2+ (OR, 0.68; 95% CI, 0.51-0.92), HR-HER2+ (OR, 0.63; 95% CI, 0.44-0.90) and HR-HER2- (OR, 0.77; 95% CI, 0.56-1.05) compared with HR+HER2-. Inclusion of other risk-associated variants did not change these observations. CONCLUSIONS The rs140068132 polymorphism is associated with decreased risk of breast cancer in Peruvians and is more protective against HR- and HER2+ diseases independently of other breast cancer-associated variants in the 6q25 region. IMPACT These results could inform functional analyses to understand the mechanism by which rs140068132-G reduces risk of breast cancer development in a subtype-specific manner. They also illustrate the importance of including diverse individuals in genetic studies.
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Affiliation(s)
- Valentina A. Zavala
- Department of Public Health Sciences, University of California Davis, Davis, California
| | | | | | | | | | - Zaida Morante
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | | | | | - Henry Gómez
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | | | | | | | - Claudia Monge
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | | | - Scott Huntsman
- Division of General Internal Medicine, Department of Medicine, University of California, San Francisco, San Francisco, California
| | - Donglei Hu
- Division of General Internal Medicine, Department of Medicine, University of California, San Francisco, San Francisco, California
| | - Sixto E. Sánchez
- Universidad Peruana de Ciencias Aplicadas, Lima, Peru and Asociación Civil Proyectos en Salud (PROESA), Lima, Peru
| | - Michelle A. Williams
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Angel Núñez-Marrero
- Department of Biochemistry, Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Puerto Rico
| | - Lenin Godoy
- Department of Biochemistry, Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Puerto Rico
| | - Aaron Hechmer
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | - Adam B. Olshen
- Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California
| | - Julie Dutil
- Department of Biochemistry, Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Puerto Rico
| | - Elad Ziv
- Division of General Internal Medicine, Department of Medicine, University of California, San Francisco, San Francisco, California
| | - Jovanny Zabaleta
- Department of Pediatrics and Stanley S. Scott Cancer Center LSUHSC, New Orleans, Louisiana
| | - Bizu Gelaye
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Jule Vásquez
- Instituto Nacional de Enfermedades Neoplasicas, Lima, Peru
| | | | | | | | - Laura Fejerman
- Department of Public Health Sciences, University of California Davis, Davis, California
- UC Davis Comprehensive Cancer Center, University of California Davis, Davis, California
- Corresponding Author: Laura Fejerman, UC Davis Comprehensive Cancer Center, 451 Health Sciences Drive, Davis, CA 95616. Phone: 530-754-1690; E-mail:
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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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Abstract
Surname distribution can be a useful tool for studying the genetic structure of a human population. In South America, the Uruguay population has traditionally been considered to be of European ancestry, despite its trihybrid origin, as proved through genetics. The aim of this study was to investigate the structure of the Uruguayan population, resulting from population movements and surname drift in the country. The distribution of the surnames of 2,501,774 people on the electoral register was studied in the nineteen departments of Uruguay. Multivariate approaches were used to estimate isonymic parameters. Isolation by Distance was measured by correlating isonymic and geographic distances. In the study sample, the most frequent surnames were consistently Spanish, reflecting the fact that the first immigration waves occurred before Uruguayan independence. Only a few surnames of Native origin were recorded. The effective surname number (α) for the entire country was 302, and the average for departments was 235.8 ± 19. Inbreeding estimates were lower in the south-west of the country and in the densely populated Montevideo area. Isonymic distances between departments were significantly correlated with linear geographic distance (p < 0.001) indicating continuously increasing surname distances up to 400 km. Surnames form clusters related to geographic regions affected by different historical processes. The isonymic structure of Uruguay shows a radiation towards the east and north, with short-range migration playing a major role, while the contribution of drift, considering the small variance of α, appears to be minor.
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Pereyra S, Sosa C, Bertoni B, Sapiro R. Transcriptomic analysis of fetal membranes reveals pathways involved in preterm birth. BMC Med Genomics 2019; 12:53. [PMID: 30935390 PMCID: PMC6444860 DOI: 10.1186/s12920-019-0498-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 03/10/2019] [Indexed: 12/21/2022] Open
Abstract
Background Preterm birth (PTB), defined as infant delivery before 37 weeks of completed gestation, results from the interaction of both genetic and environmental components and constitutes a complex multifactorial syndrome. Transcriptome analysis of PTB has proven challenging because of the multiple causes of PTB and the numerous maternal and fetal gestational tissues that must interact to facilitate parturition. The transcriptome of the chorioamnion membranes at the site of rupture in PTB and term fetuses may reflect the molecular pathways of preterm labor. Methods In this work, chorioamnion membranes from severe preterm and term fetuses were analyzed using RNA sequencing. Functional annotations and pathway analysis of differentially expressed genes were performed with the GAGE and GOSeq packages. A subset of differentially expressed genes in PTB was validated in a larger cohort using qRT-PCR and by comparing our results with genes and pathways previously reported in the literature. Results A total of 270 genes were differentially expressed (DE): 252 were upregulated and 18 were down-regulated in severe preterm births relative to term births. Inflammatory and immunological pathways were upregulated in PTB. Both types of pathways were previously suggested to lead to PTB. Pathways that were not previously reported in PTB, such as the hemopoietic pathway, appeared upregulated in preterm membranes. A group of 18 downregulated genes discriminated between term and severe preterm cases. These genes potentially characterize a severe preterm transcriptome pattern and therefore are candidate genes for understanding the syndrome. Some of the downregulated genes are involved in the nervous system, morphogenesis (WNT1, DLX5, PAPPA2) and ion channel complexes (KCNJ16, KCNB1), making them good candidates as biomarkers of PTB. Conclusions The identification of this DE gene pattern will help with the development of a multi-gene disease classifier. These markers were generated in an admixed South American population in which PTB has a high incidence. Since the genetic background may differentially impact different populations, it is necessary to include populations such as those from South America and Africa, which are usually excluded from high-throughput approaches. These classifiers should be compared to those in other populations to obtain a global landscape of PTB. Electronic supplementary material The online version of this article (10.1186/s12920-019-0498-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Silvana Pereyra
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Av. General Flores 2125, C.P, 11800, Montevideo, Uruguay
| | - Claudio Sosa
- Clínica Ginecotologica "C", Centro Hospitalario Pereira Rossell, Facultad de Medicina, Universidad de la República, Bvar. General Artigas 1590, C:P.11600, Montevideo, Uruguay
| | - Bernardo Bertoni
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Av. General Flores 2125, C.P, 11800, Montevideo, Uruguay
| | - Rossana Sapiro
- Departamento de Histología y Embriología, Facultad de Medicina, Universidad de la República, Av. General Flores 2125, C.P, 11800, Montevideo, Uruguay.
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Larrandaburu M, Vianna FL, Griot K, Queijo C, Monzón G, Ugarte C, Nacul L, Schuler-Faccini L, Sanseverino MTV. Rare Diseases in Uruguay: Focus on Infants with Abnormal Newborn Screening. JOURNAL OF INBORN ERRORS OF METABOLISM AND SCREENING 2019. [DOI: 10.1590/2326-4594-jiems-2019-0002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Mariela Larrandaburu
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Ministerio de Salud, Uruguay
| | - Fernanda L.S Vianna
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Hospital de Clinicas de Porto Alegre, Brazil; Instituto Nacional de Genética Médica Populacional, Brazil
| | | | - Cecilia Queijo
- Laboratorio de Pesquisa Neonatal del Instituto de la Seguridad Social, Uruguay
| | | | | | - Luis Nacul
- London School of Hygiene and Tropical Medicine School, United Kindom
| | - Lavinia Schuler-Faccini
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Hospital de Clinicas de Porto Alegre, Brazil; Instituto Nacional de Genética Médica Populacional, Brazil
| | - Maria Teresa V. Sanseverino
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Hospital de Clinicas de Porto Alegre, Brazil; Instituto Nacional de Genética Médica Populacional, Brazil; Pontificia Universidade Catolica do Rio Grande do Sul, Brazil
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Sans M, Figueiro G. From Genetics to Identity and Back Again: Genetic Continuity and Indian Reemergence in Uruguay. AMERICAN ANTHROPOLOGIST 2018. [DOI: 10.1111/aman.13046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Skowronek MF, Velazquez T, Mut P, Figueiro G, Sans M, Bertoni B, Sapiro R. Associations between male infertility and ancestry in South Americans: a case control study. BMC MEDICAL GENETICS 2017; 18:78. [PMID: 28747152 PMCID: PMC5530489 DOI: 10.1186/s12881-017-0438-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 07/13/2017] [Indexed: 01/20/2023]
Affiliation(s)
| | - Tatiana Velazquez
- Departamento de Genética, Facultad de Medicina UDELAR, Montevideo, Uruguay
| | - Patricia Mut
- Departamento de Genética, Facultad de Medicina UDELAR, Montevideo, Uruguay
| | - Gonzalo Figueiro
- Departamento de Antropología, Facultad de Humanidades y Ciencias de la Educación, UDELAR, Montevideo, Uruguay
| | - Monica Sans
- Departamento de Antropología, 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.
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Prevalence of EGFR Mutations in Lung Cancer in Uruguayan Population. J Cancer Epidemiol 2017; 2017:6170290. [PMID: 28744312 PMCID: PMC5506465 DOI: 10.1155/2017/6170290] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/22/2017] [Accepted: 05/29/2017] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Incorporation of molecular analysis of the epidermal growth factor receptor (EGFR) gene into routine clinical practice represents a milestone for personalized therapy of the non-small-cell lung cancer (NSCLC). However, the genetic testing of EGFR mutations has not yet become a routine clinical practice in developing countries. In view of different prevalence of such mutations among different ethnicities and geographic regions, as well as the limited existing data from Latin America, our aim was to study the frequency of major types of activating mutations of the EGFR gene in NSCLC patients from Uruguay. METHODS We examined EGFR mutations in exons 18 through 21 in 289 NSCLC Uruguayan patients by PCR-direct sequencing. RESULTS EGFR mutations were detected in 53 of the 289 (18.3%) patients, more frequently in women (23.4%) than in men (14.5%). The distribution by exon was similar to that generally reported in the literature. CONCLUSIONS This first epidemiological study of EGFR mutations in Uruguay reveals a wide spectrum of mutations and an overall prevalence of 18.3%. The background ethnic structure of the Uruguayan population could play an important role in explaining our findings.
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12
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Pereyra S, Bertoni B, Sapiro R. Interactions between environmental factors and maternal–fetal genetic variations: strategies to elucidate risks of preterm birth. Eur J Obstet Gynecol Reprod Biol 2016; 202:20-5. [DOI: 10.1016/j.ejogrb.2016.04.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 04/06/2016] [Accepted: 04/23/2016] [Indexed: 12/19/2022]
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Larrandaburu M, Matte U, Noble A, Olivera Z, Sanseverino MTV, Nacul L, Schuler-Faccini L. Ethics, genetics and public policies in Uruguay: newborn and infant screening as a paradigm. J Community Genet 2015; 6:241-9. [PMID: 26021874 PMCID: PMC4524831 DOI: 10.1007/s12687-015-0236-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 05/13/2015] [Indexed: 10/23/2022] Open
Abstract
Uruguay is a middle-income country and the smallest in South America. Its population is under 3.3 million. The demographic and epidemiological characteristics are similar to those of developed countries, with a high burden associated with congenital anomalies. Infant mortality rate (IMR) decreased from 37/1000 live births, in 1980, to 8.8/1000, in 2013. This is largely explained by medical and social policies. IMR related to congenital anomalies, however, remained unchanged for the last 30 years. Therefore, programmes for prevention of congenital disorders were developed, such as the National Newborn Screening Programme. Mandatory, universal, free infant screening was implemented two decades ago. The Ministry of Public Health created the Comprehensive Plan on Birth Defects and Rare Diseases (PIDCER), to develop a strategic public policy tool enabling comprehensive, universal, quality care during their entire lifetime. Recent national legislation created provisions for newborn and infant screening, including for congenital hypothyroidism, phenylketonuria, congenital adrenal hyperplasia, cystic fibrosis and medium-chain acyl-CoA dehydrogenase, via blood spot test, otoacoustic emissions, systematic physical examination and hip ultrasound. We discuss how this programme was implemented, the current situation of rare diseases, the institution managing disability in Uruguay and the development of new laws based on the MPH's PIDCER. It illustrates how Uruguay is developing public policies in the genomic era, based both on science and bioethics.
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Affiliation(s)
- Mariela Larrandaburu
- />Ministry of Public Health of Uruguay, 18 de Julio 1892, 11200 Montevideo, Uruguay
- />Post-Graduate Program in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, RS Brazil
- />Born Healthy Program, National Institute of Population Medical Genetics - INAGEMP, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS Brazil
| | - Ursula Matte
- />Post-Graduate Program in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, RS Brazil
| | - Ana Noble
- />Ministry of Public Health of Uruguay, 18 de Julio 1892, 11200 Montevideo, Uruguay
| | - Zully Olivera
- />Ministry of Public Health of Uruguay, 18 de Julio 1892, 11200 Montevideo, Uruguay
| | - Maria Teresa V. Sanseverino
- />Post-Graduate Program in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, RS Brazil
- />Born Healthy Program, National Institute of Population Medical Genetics - INAGEMP, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS Brazil
| | | | - Lavinia Schuler-Faccini
- />Post-Graduate Program in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, Porto Alegre, RS Brazil
- />Born Healthy Program, National Institute of Population Medical Genetics - INAGEMP, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS Brazil
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Cappetta M, Berdasco M, Hochmann J, Bonilla C, Sans M, Hidalgo PC, Artagaveytia N, Kittles R, Martínez M, Esteller M, Bertoni B. Effect of genetic ancestry on leukocyte global DNA methylation in cancer patients. BMC Cancer 2015; 15:434. [PMID: 26012346 PMCID: PMC4445803 DOI: 10.1186/s12885-015-1461-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 05/21/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The study of genetic variants alone is not enough to explain a complex disease like cancer. Alterations in DNA methylation patterns have been associated with different types of tumor. In order to detect markers of susceptibility for the development of cutaneous melanoma and breast cancer in the Uruguayan population, we integrated genetic and epigenetic information of patients and controls. METHODS We performed two case-control studies that included 49 individuals with sporadic cutaneous melanoma and 73 unaffected controls, and 179 women with sporadic breast cancer and 209 women controls. We determined the level of global leukocyte DNA methylation using relative quantification of 5mdC by HPLC, and we compared methylation levels between cases and controls with nonparametric statistical tests. Since the Uruguayan population is admixed and both melanoma and breast cancer have very high incidences in Uruguay compared to other populations, we examined whether individual ancestry influences global leucocyte DNA methylation status. We carried out a correlation analysis between the percentage of African, European and Native American individual ancestries, determined using 59 ancestry informative markers, and global DNA methylation in all participants. RESULTS We detected global DNA hypomethylation in leukocytes of melanoma and breast cancer patients compared with healthy controls (p < 0.001). Additionally, we found a negative correlation between African ancestry and global DNA methylation in cancer patients (p <0.005). CONCLUSIONS These results support the potential use of global DNA methylation as a biomarker for cancer risk. In addition, our findings suggest that the ancestral genome structure generated by the admixture process influences DNA methylation patterns, and underscore the importance of considering genetic ancestry as a modifying factor in epigenetic association studies in admixed populations such as Latino ones.
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Affiliation(s)
- Mónica Cappetta
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
| | - María Berdasco
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de LLobregat, Barcelona, Catalonia, Spain.
| | - Jimena Hochmann
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
| | - Carolina Bonilla
- School of Social and Community Medicine, University of Bristol, Bristol, UK.
| | - Mónica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay.
| | - 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.
| | - Nora Artagaveytia
- Departamento Básico de Medicina, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
| | - Rick Kittles
- Department of Surgery and Public Health, University of Arizona, Tucson, USA.
| | - Miguel Martínez
- Cátedra de Dermatología, Hospital de Clínicas "Manuel Quintela", Universidad de la República, Montevideo, Uruguay.
| | - Manel Esteller
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de LLobregat, Barcelona, Catalonia, Spain.
- Department of Physiological Sciences II, School of Medicine, University of Barcelona, Barcelona, Spain.
- Institucio Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain.
| | - Bernardo Bertoni
- Departamento de Genética, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay.
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15
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Bonilla C, Bertoni B, Hidalgo PC, Artagaveytia N, Ackermann E, Barreto I, Cancela P, Cappetta M, Egaña A, Figueiro G, Heinzen S, Hooker S, Román E, Sans M, Kittles RA. Breast cancer risk and genetic ancestry: a case-control study in Uruguay. BMC WOMENS HEALTH 2015; 15:11. [PMID: 25783644 PMCID: PMC4341228 DOI: 10.1186/s12905-015-0171-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 01/27/2015] [Indexed: 01/26/2023]
Abstract
Background Uruguay exhibits one of the highest rates of breast cancer in Latin America, similar to those of developed nations, the reasons for which are not completely understood. In this study we investigated the effect that ancestral background has on breast cancer susceptibility among Uruguayan women. Methods We carried out a case–control study of 328 (164 cases, 164 controls) women enrolled in public hospitals and private clinics across the country. We estimated ancestral proportions using a panel of nuclear and mitochondrial ancestry informative markers (AIMs) and tested their association with breast cancer risk. Results Nuclear individual ancestry in cases was (mean ± SD) 9.8 ± 7.6% African, 13.2 ± 10.2% Native American and 77.1 ± 13.1% European, and in controls 9.1 ± 7.5% African, 14.7 ± 11.2% Native American and 76.2 ± 14.2% European. There was no evidence of a difference in nuclear or mitochondrial ancestry between cases and controls. However, European mitochondrial haplogroup H was associated with breast cancer (OR = 2.0; 95% CI 1.1, 3.5). Conclusions We have not found evidence that overall genetic ancestry differs between breast cancer patients and controls in Uruguay but we detected an association of the disease with a European mitochondrial lineage, which warrants further investigation. Electronic supplementary material The online version of this article (doi:10.1186/s12905-015-0171-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Carolina Bonilla
- School of Social and Community Medicine, University of Bristol, Oakfield House, Oakfield Grove, Bristol, BS8 2BN, UK,
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16
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Hidalgo PC, Mut P, Ackermann E, Figueiro G, Sans M. Questioning the "melting pot": analysis of Alu inserts in three population samples from Uruguay. Hum Biol 2014; 86:83-92. [PMID: 25397699 DOI: 10.3378/027.086.0202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2014] [Indexed: 11/05/2022]
Abstract
The way that immigrants integrate into recipient societies has been discussed for decades, mainly from the perspective of the social sciences. Uruguay, as other American countries, received diffferent waves of European immigrants, although the details of the process of assimilation, when it did occur, are unclear. In this study we used genetic markers to understand the process experienced by the Basques, one of the major migration waves that populated Uruguay, and their relation to other immigrants, as well as to Native American and African descendants. For this purpose, we analyzed the allele frequencies of 10 ALU loci (A25, ACE, APOA1, B65, D1, F13B, PV92, TPA25, HS2.43, and HS4.65) in three samples from Uruguay (two of Basque descendants, one of non-Basque descendants) from two locations: Montevideo and Trinidad. No departure from Hardy-Weinberg expectations was observed, with the exceptions of the APOA1 and D1 loci in the non-Basque descendants' samples. Our data show that the major genetic contribution in the three samples comes from Europe (78-88%), with minor African (10-15%) and Native American (0-10%) contributions. Genetic distances reveal that Basque descendants from Trinidad cluster with Europeans, whereas both Montevideo samples cluster together and are separate from other populations, showing two diffferent types of integration, related to the general characteristics of each regional population.
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Affiliation(s)
- Pedro C Hidalgo
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay AND Polo de Desarrollo Universitario, Variabilidad Genetica Humana, Centro Universitario de Tacuarembo, Universidad de la República, Tacuarembó, Uruguay
| | - Patricia Mut
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
| | - Elizabeth Ackermann
- 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
| | - Monica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, Montevideo, Uruguay
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17
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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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18
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Allelic frequencies and statistical data from 30 INDEL loci in Uruguayan population. Forensic Sci Int Genet 2014; 9:e27-9. [DOI: 10.1016/j.fsigen.2013.07.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 07/22/2013] [Accepted: 07/25/2013] [Indexed: 11/19/2022]
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19
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Stanganelli C, Travella A, Bezares R, Slavutsky I. Immunoglobulin gene rearrangements and mutational status in argentinian patients with chronic lymphocytic leukemia. CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2013; 13:447-457.e2. [PMID: 23665144 DOI: 10.1016/j.clml.2013.02.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 12/28/2012] [Accepted: 02/01/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND Chronic lymphocytic leukemia (CLL) is a clinically heterogeneous disease. The mutational status of the immunoglobulin heavy chain variable (IGHV) region represents one of the best prognostic markers and defines 2 disease subgroups: mutated (M-CLL) and unmutated (UM-CLL), with different clinical course. MATERIALS AND METHODS IGHV-D-J gene rearrangements and mutational status were analyzed in 73 Argentinian patients with CLL, 22 previously treated, by reverse transcriptase-polymerase chain reaction and bidirectional sequencing. The results were compared with those reported in other geographic regions. Fluorescence in situ hybridization analysis was also performed. RESULTS A total of 43 (58.9%) cases were of patients with M-CLL, and 30 (41.1%) were patients with UM-CLL. Deletion of chromosome 13q14 as a single alteration was more frequently observed in the M-CLL group (48%) than in the UM-CLL group (24%). In the M-CLL group, the proportion of cases with deletion of chromosome 13q14 was significantly higher than those with +12 and those with deletions of chromosomes 17p and 11q (P = .003). The most frequently used IGHV families were IGHV3 > IGHV1 > IGHV4, which are different from those observed in Asian, Brazilian, and Uruguayan series. The IGHV3-23 gene (10.8%) was the most commonly used, followed by IGHV1-69 (9.5%), IGHV4-59 and IGHV2-5 (6.8% each), and IGHV3-21 and IGHV3-30 (5.4% each). IGHV4-34 showed the lowest frequency (2.7%) in our cohort compared with published data, whereas IGHV4-59, IGHV3-72, and IGHV2-5 were overexpressed in our series. Stereotyped HCDR3 (heavy chain complementary determining region 3) was found in 9.5% of patients. CONCLUSIONS Our results showed that Argentinian patients with CLL display an IGHV gene usage that resembles that observed in Western countries and exhibited interesting similarities and differences with respect to published series from other Latin American populations, which reflect variations in the genetic background.
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Affiliation(s)
- Carmen Stanganelli
- Laboratorio de Genética de Neoplasias Linfoides, Instituto de Medicina Experimental CONICET- Academia Nacional de Medicina, Buenos Aires, Argentina
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20
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Sans M, Figueiro G, Hidalgo PC. A new mitochondrial C1 lineage from the prehistory of Uruguay: population genocide, ethnocide, and continuity. Hum Biol 2013; 84:287-305. [PMID: 23020097 DOI: 10.3378/027.084.0303] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Uruguayan population has been considered as of European descent, as its Native populations victims of genocide apparently disappeared in the 19th century. Contradicting this national belief, genetic studies have shown a substantial Native contribution. However, the continuity between prehistoric, historic, and present populations remains unproved. With the aim of adding elements to prove a possible population continuity, we studied a mitochondrial lineage, part of haplogroup C1, analyzing the complete genome of a modern Uruguayan individual and the hypervariable region I (HVRI) in prehistoric, historic, and contemporary individuals. Several individuals carried the mutations that characterize this lineage: two from an archaeological mound located in the east of the country, the Charrúa Indian chief Vaimaca Perú and five individuals from the present population. The lineage was initially characterized by its HVRI sequence, having the four typical C1 mutations and adding 16051G and 16288C; other mutations were also found: 16140C was found in all but the oldest individual, dated 1,610 years BP, while 16209C, 16422C, and 16519C were found only in some individuals. Hypervariable region II showed the typical C1 mutations and 194T. The coding region, analyzed in modern individuals, was characterized by 12378T, while other mutations found were not common to all of them. In summary, we have found and described a new lineage that shows continuity from prehistoric mound builders to the present population, through a representative of the extinct Charrúa Indians. The lineage appeared at least 1,600 years ago and is carried by approximately 0.7% of the modern Uruguayan population. The continuity of the lineage supports alternative perspectives about Uruguayan national identity and the meaning of the genocide, best labeled as ethnocide because of its consequences. It also contributes to the discussion about who the prehistoric mound builders were, and to the origin, at least in the maternal line, of a Charrúa Indian. From a more general perspective, we can conclude that the characteristics, evolution, and expansion of founder haplogroup C in America have not yet been elucidated.
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Affiliation(s)
- Monica Sans
- Department of Biological Anthropology, College of Humanities and Educational Sciences, University of the Republic, Magallanes 1577, 11,200 Montevideo, Uruguay.
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21
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Sans M, Figueiro G, Ackermann E, Barreto I, Egaña A, Bertoni B, Poittevin-Gilmet E, Maytia D, Hidalgo PC. Mitochondrial DNA in Basque descendants from the city of Trinidad, Uruguay: Uruguayan- or Basque-like population? Hum Biol 2011; 83:55-70. [PMID: 21453004 DOI: 10.3378/027.083.0104] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Like other countries in the Americas, during its colonization Uruguay was the recipient of immigrants from several ethnic groups from Europe, as well as of enslaved Africans. After its independence in 1830, Basques were the first group of Europeans to arrive in the country. In this paper, we aim to contribute to the understanding of the process of integration of these migratory waves into the Uruguayan society. For that purpose, individuals of Basque origin from the city of Trinidad, Uruguay, were chosen to participate in this study. Particularly, we wanted to determine if Basque descendants in Uruguay remained relatively isolated or if they mixed with other ethnic groups. Mitochondrial DNA (mtDNA) of 60 self-identified Basque descendants, taken from a larger sample of subjects with Basque ancestors, was analyzed. The origin of mtDNA haplogroups was 77.8% European, 20.4% Amerindian, and 1.8% African, showing similar frequencies to other Uruguayan regions. Very few sequences showed a clear Basque origin, although other sources such as the Canary Islands are likely. Moreover, genetic distances clearly show that Basque descendants are genetically closer to other Uruguayan groups than to European populations, including Basques. It is possible to conclude that Basques and their descendants in the region of Trinidad did not remain isolated and that their marriage behavior was similar to that of other Uruguayan populations. However, to have a more accurate picture of the way Basques intermarried with other populations in Uruguay, new analyses are needed that take into account paternal lineages as well as biparental genetic markers.
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Affiliation(s)
- M Sans
- Department of Biological Anthropology, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, 11200 Montevideo, Uruguay
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22
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Bianchi S, Moreno P, Landoni AI, Naya H, Oppezzo P, Dighiero G, Gabús R, Pritsch O. Immunoglobulin heavy chain V-D-J gene rearrangement and mutational status in Uruguayan patients with chronic lymphocytic leukemia. Leuk Lymphoma 2010; 51:2070-8. [PMID: 20929321 DOI: 10.3109/10428194.2010.522283] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
B-cell chronic lymphocytic leukemia (CLL) is characterized by the accumulation of long-lived circulating clonal leukemic B-cells, although the etiopathogenesis remains unclear. The incidence of CLL is variable in different regions around the world. While it is the most frequent chronic leukemia in Western countries, it has a low incidence in Asia. In this work we have investigated the immunoglobulin heavy chain gene rearrangements and mutational status in 80 Uruguayan patients with CLL, and compared these results with those obtained in other geographic regions. Our results demonstrate that Uruguayan patients with CLL display an IGHV gene usage which resembles that observed in Mediterranean countries and exhibits certain differences compared with Brazilian and Asian series, as expected, considering the ethnic basis of the Uruguayan population. This suggests that genetic influences could be important in the development and etiopathogenesis of CLL, but larger studies are necessary to substantiate this possibility.
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Simms TM, Rodriguez CE, Rodriguez R, Herrera RJ. The genetic structure of populations from Haiti and Jamaica reflect divergent demographic histories. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2010; 142:49-66. [PMID: 19918989 DOI: 10.1002/ajpa.21194] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The West Indies represent an amalgamation of African, European and in some cases, East Asian sources, but the contributions from each ethnic group remain relatively unexplored from a genetic perspective. In the present study, we report, for the first time, allelic frequency data across the complete set of 15 autosomal STR loci for general collections from Haiti and Jamaica, which were subsequently used to examine the genetic diversity present in each island population. Our results indicate that although both Haiti and Jamaica display genetic affinities with the continental African collections, a stronger African signal is detected in Haiti than in Jamaica. Although only minimal contributions from non-African sources were observed in Haiti, Jamaica displays genetic input from both European and East Asian sources, an admixture profile similar to other New World collections of African descent analyzed in this report. The divergent genetic signatures present in these populations allude to the different migratory events of Africans, Europeans, and East Asians into the New World.
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Affiliation(s)
- Tanya M Simms
- Department of Molecular and Human Genetics, College of Medicine, Florida International University, Miami, FL 33199, USA
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24
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Rey G, Skowronek F, Alciaturi J, Alonso J, Bertoni B, Sapiro R. Toll receptor 4 Asp299Gly polymorphism and its association with preterm birth and premature rupture of membranes in a South American population. Mol Hum Reprod 2008; 14:555-9. [PMID: 18723631 DOI: 10.1093/molehr/gan049] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Preterm birth (PTB) is a worldwide health problem and remains the leading cause of perinatal morbidity and mortality. Systemic and local intrauterine infections have been implicated in the pathogenesis of preterm labor and delivery. Common pathways between PTB, premature rupture of ovular membranes (PROM) and altered molecular routes of inflammation have been proposed. There is evidence to support a genetic component in these conditions. Lipopolysaccharide (LPS), a component of the cell wall of Gram-negative bacteria, is thought to play a key role in eliciting an inflammatory response. LPS is recognized by proteins of the innate immune system, including Toll-like receptor 4 (TLR4). Individuals from some European countries carrying the variant alleles resulting in an amino acid substitution (Asp299Gly) are at increased risk of Gram-negative infections and premature birth. The objective of this study was to determine if preterm newborns have different allele frequency of the Asp299Gly TLR4 variant from healthy term neonates in Uruguay. The impact of PROM was also examined. There was an increase in the risk for fetuses carrying the Asp299Gly substitution in TLR4 of being severely premature (<33 weeks) and to present PROM at the same time.
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Affiliation(s)
- G Rey
- Laboratory of Molecular Biology of Reproduction, Department of Histology and Embryology, School of Medicine, Gral. Flores 2125, CP 11800 Montevideo, Uruguay
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25
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Sans M, Merriwether DA, Hidalgo PC, Bentancor N, Weimer TA, Franco MHLP, Alvarez I, Kemp BM, Salzano FM. Population structure and admixture in Cerro Largo, Uruguay, based on blood markers and mitochondrial DNA polymorphisms. Am J Hum Biol 2006; 18:513-24. [PMID: 16788895 DOI: 10.1002/ajhb.20520] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Recent studies of the Uruguayan population revealed different amounts of Amerindian and African genetic contributions. Our previous analysis of Afro-Uruguayans from the capital city of the Department of Cerro Largo showed a high proportion of African genes, and the effects of directional mating involving Amerindian women. In this paper, we extended the analysis to a sample of more than 100 individuals representing a random sample of the population of the whole Department. Based on 18 autosomal markers and one X-linked marker, we estimated 82% European, 8% Amerindian, and 10% African contributions to their ancestry, while from seven mitochondrial DNA site-specific polymorphic markers and sequences of hypervariable segment I, we determined 49% European, 30% Amerindian, and 21% African maternal contributions. Directional matings between Amerindian women and European men were detected, but differences involving Africans were not significant. Data about the specific origins of maternal lineages were also provided, and placed in a historical context.
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MESH Headings
- Black People/ethnology
- Black People/genetics
- Blood Group Antigens/blood
- Blood Group Antigens/classification
- Chromosomes, Human, Y/classification
- Chromosomes, Human, Y/genetics
- DNA, Mitochondrial/classification
- DNA, Mitochondrial/genetics
- Demography
- Emigration and Immigration
- Gene Frequency/genetics
- Genetics, Population
- Genotype
- Haplotypes/genetics
- Humans
- Indians, South American/ethnology
- Indians, South American/genetics
- Phenotype
- Phylogeny
- Polymorphism, Genetic
- Sequence Analysis, DNA
- Uruguay/ethnology
- White People/ethnology
- White People/genetics
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Affiliation(s)
- Mónica Sans
- Departamento de Antropología Biológica, Facultad de Humanidades y Ciencias de la Educación, Universidad de la República, 11200 Montevideo, Uruguay.
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