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Pezo-Lanfranco L, Mut P, Chávez J, Fossile T, Colonese AC, Fernandes R. South American Archaeological Isotopic Database, a regional-scale multi-isotope data compendium for research. Sci Data 2024; 11:336. [PMID: 38575659 PMCID: PMC10995213 DOI: 10.1038/s41597-024-03148-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 03/18/2024] [Indexed: 04/06/2024] Open
Abstract
The South American Archaeological Isotopic Database (SAAID) is a comprehensive open-access resource that aggregates all available bioarchaeological stable and radiogenic isotope measurements, encompassing data from human individuals, animals, and plants across South America. Resulting from a collaborative effort of scholars who work with stable isotopes in this region, SAAID contains 53,781 isotopic measurements across 24,507 entries from individuals/specimens spanning over 12,000 years. SAAID includes valuable contextual information on archaeological samples and respective sites, such as chronology, geographical region, biome, and spatial coordinates, biological details like estimated sex and age for human individuals, and taxonomic description for fauna and flora. SAAID is hosted at the PACHAMAMA community within the Pandora data platform and the CORA repository to facilitate easy access. Because of its rich data structure, SAAID is particularly well-suited for conducting spatiotemporal meta-analyses. It serves as a valuable tool for addressing a variety of research topics, including the spread, adoption, and consumption intensification of food items, paleo-environmental reconstruction, as well as the exploration of mobility patterns across extensive geographic regions.
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Affiliation(s)
- Luis Pezo-Lanfranco
- Institute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain.
- Department of Prehistory, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain.
| | - Patricia Mut
- Departamento de Antropología Biológica, Universidad de la República, Montevideo, Uruguay
| | - Juan Chávez
- Department of Anthropology, University of California, Riverside, USA
- Observatorio de Patrimonio Cultural y Arqueológico - Instituto de Investigaciones Antropológicas y Arqueológicas, Universidad Mayor de San Andrés, La Paz, Bolivia
| | - Thiago Fossile
- Institute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Department of Prehistory, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - André Carlo Colonese
- Institute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Department of Prehistory, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Ricardo Fernandes
- Department of Archaeology, Max Planck Institute of Geoanthropology, Jena, Germany.
- Faculty of Archaeology, University of Warsaw, Warsaw, Poland.
- Arne Faculty of Arts, Masaryk University, Brno, Czech Republic.
- Climate Change and History Research Initiative, Princeton University, Princeton, USA.
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Figueiro G, Mut P, Ale L, Flores-Gutiérrez S, Greif G, Hidalgo PC, Luna L, Ackermann E, Negro RG, Spangenberg L, Naya H, Sans M. Filogeografía de mitogenomas indígenas de Uruguay. RevArgAntropBiol 2022. [DOI: 10.24215/18536387e042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recientemente, diversos estudios sobre la población uruguaya han demostrado que está conformada por desiguales aportes de europeos, africanos y pueblos originarios, entre otros. El aporte indígena es mayor cuando se analiza la contribución por línea materna, aunque su origen étnico/geográfico no es claro, ni tampoco cuándo ni cómo llegaron los distintos grupos. Para aportar al conocimiento del poblamiento prehistórico e histórico del territorio y sus relaciones con otras poblaciones se analizan, por secuenciación masiva, 32 genomas mitocondriales completos (mitogenomas) de habitantes actuales del país, identificados previamente por sus regiones hipervariables como correspondientes a los cuatro haplogrupos principales de origen americano. Se determinaron siete nuevos subhaplogrupos (A2be, A2bf, B2an, C1d1h, C1b30, C1b31 y D1x), otro se redenominó (C1d1d - actual C1d1g) y se plantea la revisión de los criterios de asignación de B2b6 y D1g5. Se estimó la antigüedad de los subhaplogrupos nuevos, que varía entre 4554 y 11985 años, con la excepción de C1d1g, cuya edad fue estimada en 20736 años. Algunas secuencias pudieron ser vinculadas a distintos grupos étnicos o a diversas regiones geográficas, como Amazonia, Chaco, Pampa, o Andes. Se discuten las nuevas asignaciones desubhaplogrupos y las de algunos previamente definidos, así como su distribución geográfica y antigüedad, con relación al panorama general de América del Sur.
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Colistro V, Mut P, Hidalgo PC, Carracedo A, Quintela I, Rojas-Martínez A, Sans M. Differential admixture in Latin American populations and its impact on the study of colorectal cancer. Genet Mol Biol 2020; 43:e20200143. [PMID: 33306774 PMCID: PMC7783724 DOI: 10.1590/1678-4685-gmb-2020-0143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/14/2020] [Indexed: 11/22/2022] Open
Abstract
Genome-wide association studies focused on searching genes responsible for
several diseases. Admixture mapping studies proposed a more efficient
alternative capable of detecting polymorphisms contributing with a small effect
on the disease risk. This method focuses on the higher values of linkage
disequilibrium in admixed populations. To test this, we analyzed 10 genomic
regions previously defined as related with colorectal cancer among nine
populations and studied the variation pattern of haplotypic structures and
heterozygosity values on seven categories of SNPs. Both analyses showed
differences among chromosomal regions and studied populations. Admixed
Latin-American samples generally show intermediate values. Heterozygosity of the
SNPs grouped in categories varies more in each gene than in each population.
African related populations have more blocks per chromosomal region, coherently
with their antiquity. In sum, some similarities were found among Latin American
populations, but each chromosomal region showed a particular behavior, despite
the fact that the study refers to genes and regions related with one particular
complex disease. This study strongly suggests the necessity of developing
statistical methods to deal with di- or tri-hybrid populations, as well as to
carefully analyze the different historic and demographic scenarios, and the
different characteristics of particular chromosomal regions and evolutionary
forces.
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Affiliation(s)
- Valentina Colistro
- Universidad de la República, Facultad de Medicina, Departamento de Métodos Cuantitativos, Montevideo, Uruguay
| | - Patricia Mut
- Universidad de la República, Facultad de Humanidades y Ciencias de la Educación, Departamento de Antropología Biológica, Montevideo, Uruguay
| | - Pedro C Hidalgo
- Universidad de la República, Centro Universitario de Tacuarembó, Polo de Desarrollo Universitario Diversidad Genética Humana, Tacuarembó, Uruguay
| | - Angel Carracedo
- Universidad de Santiago de Compostela, Centro Nacional de Genotipado (CEGEN), Spain.,Universidade de Santiago de Compostela, CIBER de Enfermedades Raras (CIBERER)-Instituto de Salud Carlos III, Grupo de Medicina Xenómica, Santiago de Compostela, Spain
| | - Inés Quintela
- Universidad de Santiago de Compostela, Centro Nacional de Genotipado (CEGEN), Spain
| | | | - Mónica Sans
- Universidad de la República, Facultad de Humanidades y Ciencias de la Educación, Departamento de Antropología Biológica, Montevideo, Uruguay
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Sans M, Figueiro G, Bonilla C, Bertoni B, Cappetta M, Artagaveytia N, Ackermann E, Mut P, Hidalgo PC. Ancestría genética y estratificación social en Montevideo, Uruguay. RevArgAntropBiol 2020. [DOI: 10.24215/18536387e029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Diversos estudios genéticos han demostrado que la población uruguaya es trihíbrida, formada por europeo/mediterráneos, indígenas y africanos, cuyo aporte varía en distintas regiones del país. Pese a que Montevideo es la capital de la República, hay escasos estudios sobre los orígenes de su población, que pueden diferir de otras regiones. En este trabajo se propone indagar sobre estos orígenes a partir de información genética en una muestra derivada de una previamente publicada, profundizando en algunas características para determinar su posible influencia en la estimación de la ancestría. Se consideró una muestra de 269 mujeres (casos y controles de un estudio de cáncer de mama) en quienes se analizaron haplogrupos y secuencias de las regiones hipervariables del ADN mitocondrial (ADNmt) y marcadores individuales de ancestría (AIMs) del ADN nuclear. Se observó que había diferencias en los porcentajesde ancestría cuando se analizaban separadamente las personas que se atendían en el sistema público de salud en relación a las que lo hacían en el sistema mutual, con diferencias significativas para el aporte indígena y el europeo/mediterráneo. Luego de corregidos los valores por lugar de atención de salud, se estimaron los siguientes aportes: 24.6% indígena, 67,7% europeo/mediterráneo y 7,7% africano para herencia materna, y de 11,1% indígena, 81,4% europeo/mediterráneo, y 7,5% africano para la herencia biparental. Se analizaron particularmente los aportes indígena y africano y se discutieron los resultados con relación a otros estudios. Debido a las diferencias encontradas relacionadas con la heterogeneidad de la población montevideana, se alerta sobre el muestreo y valores de referencia para estudios poblacionales futuros.
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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 Med Genet 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] [What about the content of this article? (0)] [Affiliation(s)] [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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González-Cao M, Arance A, Piulats JM, Marquez-Rodas I, Manzano JL, Berrocal A, Crespo G, Rodriguez D, Perez-Ruiz E, Berciano M, Soria A, Castano AG, Espinosa E, Montagut C, Alonso L, Puertolas T, Aguado C, Royo MA, Blanco R, Rodríguez JF, Muñoz E, Mut P, Barron F, Martin-Algarra S. Pembrolizumab for advanced melanoma: experience from the Spanish Expanded Access Program. Clin Transl Oncol 2017; 19:761-768. [DOI: 10.1007/s12094-016-1602-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/16/2016] [Indexed: 11/28/2022]
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Algarra SM, Alonso L, Valdivia J, Castaño AG, Escrig V, Mut P, Ballesteros A, Puertolas T, Ortega E, Berrocal A. Spanish Melanoma Multidisciplinary Group (GEM) Experience with Ipilimumab (IPI) in the Expanded Access Programme (EAP). Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33706-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Alarcon J, Guillot M, Mut P, Luna P. Analysis of management of rectal carcinoma (RC) after the establishment of Multidisciplinary Rectal Cancer Committee (MRCC). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Pafundo DE, Mut P, Pérez Recalde M, González-Lebrero RM, Fachino V, Krumschnabel G, Schwarzbaum PJ. Effects of extracellular nucleotides and their hydrolysis products on regulatory volume decrease of trout hepatocytes. Am J Physiol Regul Integr Comp Physiol 2004; 287:R833-43. [PMID: 15217790 DOI: 10.1152/ajpregu.00199.2004] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In trout hepatocytes, hypotonic swelling is followed by a compensatory shrinkage called regulatory volume decrease (RVD). It has been postulated that extracellular ATP and other nucleotides may interact with type 2 receptors (P(2)) to modulate this response. In addition, specific ectoenzymes hydrolyze ATP sequentially down to adenosine, which may bind to type 1 receptors (P(1)) and also influence RVD. Accordingly, in this study, we assessed the role of extracellular nucleoside 5'-tri- and diphosphates and of adenosine on RVD of trout hepatocytes. The extent of RVD after 40 min of maximum swelling was denoted as RVD(40), whereas the initial rate of RVD was called v(RVD). In the presence of hypotonic medium (60% of isotonic), hepatocytes swelled 1.6 times followed by v(RVD) of 1.7 min(-1) and RVD(40) of 60.2%. ATP, UTP, UDP, or ATPgammaS (P(2) agonists; 5 microM) increased v(RVD) 1.5-2 times, whereas no changes were observed in the values of RVD(40). Addition of 100 microM suramin or cibacron blue (P(2) antagonists) to the hypotonic medium produced no effect on v(RVD) but a 53-58% inhibition of RVD(40). Incubation of hepatocytes in the presence of either 5 microM [gamma-(32)P]ATP or [alpha-(32)P]ATP induced the extracellular release of [gamma-(32)P]P(i) (0.21 nmol.10(-6) cells(-1).min(-1)) and [alpha-(32)P]P(i) ( approximately 8 x 10(-3) nmol.10(-6) cells(-1).min(-1)), suggesting the presence of ectoenzymes capable of fully dephosphorylating ATP. Concerning the effect of P(1) activation on RVD, 5 microM adenosine, both in the presence and absence of 100 microM S-(4-nitrobenzil)-6-tioinosine (a blocker of adenosine uptake), decreased RVD(40) by 37-44%, whereas 8-phenyl theophylline, a P(1) antagonist, increased RVD(40) by 15%. Overall, results indicate that ATP, UTP, and UDP, acting via P(2), are important factors promoting RVD of trout hepatocytes, whereas adenosine binding to P(1) inhibits this process.
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Affiliation(s)
- D E Pafundo
- Instituto de Química y Fisicoquímica Biológicas (Facultad de Farmacia y Bioquímica Universidad de Buenos Aires, C1113AAD Buenos Aires, Argentina
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